Thousands of Artificial Knees and Hips Wear Out Prematurely

By Fred Schulte, KFF Health News

Ron Irby expected the artificial knee implanted in his right leg in September 2018 would last two decades — perhaps longer.

Yet in just three years, the Optetrak implant manufactured by Exactech in Gainesville, Florida, had worn out and had to be replaced — a painful and debilitating operation.

“The surgery was a huge debt of pain paid over months,” said Irby, 71, a Gainesville resident and retired medical technologist with the Department of Veterans Affairs.

Irby is one of more than 1,100 patients suing Exactech after it began recalling artificial knees, hips, and ankles, starting in August 2021. A letter Exactech sent to surgeons blamed a packaging defect dating back as far as 2004 for possibly causing the plastic in a knee component to wear out prematurely in about 140,000 implants.

Many patients argue in hundreds of lawsuits that they have suffered through, or could soon face, challenging and risky operations to replace defective implants that failed.

Although Exactech does not offer an express warranty on its products, the company stresses the durability of its implants in advertising, even suggesting they likely will outlive their human recipients.

RON IRBY

Exactech, which grew over three decades from a mom-and-pop device manufacturer into a global entity that sold for $737 million in 2018, declined comment, citing the “ongoing litigation,” said company spokesperson Tom Johnson. In court filings, Exactech has argued that its products are not defective and have “an excellent history.”

A KFF Health News review of thousands of pages of court filings in patient lawsuits, a pending whistleblower lawsuit, and other government records shows that the company is being accused of downplaying or concealing evidence of product failures from patients and federal regulators for years. In hundreds of instances, according to government records, the company took years to report adverse events to a federal database that tracks device failures.

In his suit, Irby alleges that Exactech “knew or should have known” that the Optetrak “had an unacceptable failure and complication rate.” He said Exactech used packaging materials of “an inferior grade or quality.”

“I think they were cutting corners to improve their bottom line,” Irby told KFF Health News.

Exactech denied the allegations in a legal filing in Irby’s suit, in which it described the Optetrak device as “safe and effective.”

‘Trailblazing’ Implant

Surgeon William “Bill” Petty chaired the orthopedics department at the University of Florida in Gainesville, when he, his wife, Betty, and Gary Miller, a biomedical engineer and fellow faculty member, formed Exactech in November 1985. The Pettys served in corporate roles until retiring in early 2020. Their first hire was their son David in 1988, who remains on Exactech’s board of directors.

Exactech’s fortunes started to take off in 1994, when it inked a major deal to license and market the Optetrak knee implant based on designs by surgeons and engineers at the prestigious Hospital for Special Surgery in New York City. That alliance won Exactech instant credibility in the fiercely competitive device industry.

So did its pedigree as a “surgeon-focused” business with a family-run vibe, small enough that surgeons considering its wares could meet the owners and tour its Florida plant.

Building on that goodwill, Exactech’s sales shot past $124 million in 2007, about half generated by the Optetrak knee system.

“It’s not just a road we’re on, it’s a trail we’re blazing,” the company boasted in sales literature aimed at surgeons.

Exactech’s corporate confidence belies years of warnings and doubts about the durability of the Optetrak, according to whistleblowers — one whistleblower called it an “open secret” inside the company.

Notably, there were concerns about the fragility of a finned tibial tray, one of the four pieces of the knee replacement that fits into the shin bone, according to the whistleblower lawsuit.

For starters, several surgeons complained that the knee implants loosened prematurely, causing patients pain and limiting their ability to move around, court records allege.

While 95% of artificial knees should last at least a decade, surgeons had to pull out and replace many Optetrak components — a complex operation known as revision surgery — much sooner, according to allegations in patient lawsuits.

Optetrak knee implant

Christopher Hutchins, a Connecticut orthopedic surgeon who relied on the Optetrak finned devices for more than 350 knee surgeries, said in a court deposition that some loosened in as little as two to three years. He called that “awfully premature” and “extraordinary.”

Hutchins vented his frustrations in a brief meeting with Exactech co-founder Bill Petty at a Rhode Island hospital in either 2006 or 2007, according to his deposition. Petty told him at the meeting he “realized that it was a problem” with the device, according to Hutchins.

“I was somewhat struck that if they knew there was a problem why it wasn’t being addressed and why the product wasn’t being pulled from the market,” Hutchins testified in the November 2021 deposition.

“There was no disclosure or transparency.”

Older patients not only suffered physical pain, but also felt an “emotional burden” from facing revision surgery in which results often are “not as good as the first go around,” Hutchins explained during his deposition testimony.“I’m in the business to try to make people better, and when things fail, I take it to heart.”

Hutchins was not the only surgeon alarmed by what he says were early failures of the Optetrak devices and the company’s tepid response.

‘Popping Out Right and Left’

In August 2005, Maine orthopedic surgeon Wayne Moody told company officials that Optetrak had loosened and needed to be revised in 25 out of 385 operations he had performed over the previous four years, according to meeting minutes filed in court.

One knee implant gave out in just nine months, Moody told the group, according to the minutes.

In a deposition, Robert Farley, a former Exactech sales agent who filed a whistleblower lawsuit in 2018 alleging fraud by the company, alleged that he heard two colleagues joke about Moody’s tribulations at a national sales conference.

Moody “probably had 50-something revisions. … They’re just popping out right and left,” the sales agent said, according to Farley’s suit.

Fellow whistleblower Manuel Fuentes, a former Exactech senior product manager, testified in a deposition that pulling the product off the market around 2008 “would have been the ethical and moral thing to do.”

At a meeting in early 2008 attended by the company’s top brass, including Bill Petty, the company’s marketing director at the time, Charley Rye, floated the idea of a recall, Fuentes said. Company executives shot that down as “financially detrimental,” Fuentes testified in a sworn declaration filed with the court.

Asked about the meeting during a December 2021 deposition, Petty replied, “I don’t recall that anyone suggested a recall.”

Exactech discussed the loosening problem in an internal memo that said between 2006 and 2009 the company “began to get some negative feedback” about the Optetrak “that was at times confounding and difficult to process,” court records show.

The discouraging reports ranged from complaints of early revisions from at least 10 U.S. surgeons and surgery practices in several of the more than 30 countries where Exactech sold the implant, court records show.

The results did little to dim Exactech’s prospects. From 1994 through April 2022, Exactech sold 58,763 Optetrak devices with finned trays for use by 514 surgeons nationwide, according to an affidavit by a company official.

Many lawsuits argue that instead of warning patients and surgeons about the loosening problem, Exactech replaced the finned tray component in its newest products, a strategy device industry critics refer to as a “silent recall.” Exactech denies that and said in a court filing that design changes it made were part of a “natural evolution” of the Optetrak.

Even as Exactech rolled out newer generations of the Optetrak, the company faced lawsuits and other criticism alleging it had failed to come clean about unusually high surgical revision rates.

Late Reporting to FDA

The Food and Drug Administration runs a massive, public, searchable databank called MAUDE to warn the public of dangers linked to medical devices and drugs.

Manufacturers must advise the FDA when they learn their device may have caused or contributed to a death or serious injury, or malfunctioned in a way that might recur and cause harm.Those reports must be submitted within 30 days unless a special exemption is granted.

But court and government records show that reports of adverse reactions tied to Exactech’s implant sometimes took years to show up in the government database — if they were reported at all.

Exactech failed to advise the FDA of dozens of Optetrak early revision complaints lodged by orthopedic surgeons Moody and Hutchins, a company representative acknowledged in a court filing.

KFF Health News downloaded the FDA data and found about 400 examples in which Exactech reported adverse events to the MAUDE database two years or more after learning of them.

FDA inspectors who combed through Exactech’s internal files in 2017 cited the company for failing to undertake an “adequate investigation” of complaints, according to FDA records cited in court filings.

In court filings, Exactech steadfastly denied Optetrak has any defects. Instead, it blamed the loosening problem on surgeons, saying they had failed to cement the knee implants into place correctly or misaligned them.

The company said it had no obligation to report poor outcomes tied to mistakes by surgeons — even though the FDA requires companies to report injuries involving “user error.” In 2022, a federal judge in the whistleblower case, in denying a motion to dismiss, found that Exactech was “hard-pressed” to claim it was not obligated to report the adverse events.

The three whistleblowers are accusing Exactech of fraud for allegedly selling defective products to Medicare and other federal health care programs. The case is pending in federal court in Alabama and Exactech has denied any wrongdoing. Exactech in mid-August filed a motion to dismiss the case.

Lawyers for more than 300 injured patients suing in Alachua County Circuit Court in Florida are pressing for full disclosure of 2,435 complaints to the company alleging deficiencies with Exactech knee products, which the company admits receiving as of the end of April.

Cutting Corners

In other pending lawsuits, patients argue the company pointedly ignored evidence of chronic safety issues to fuel profits.

Keith Nuzzo, of Litchfield, Maine, is one. He alleged that Exactech “cut corners, utilized inferior manufacturing practices … [and] only disclosed information or took corrective action if contacted by regulatory authorities.”

Nuzzo had a right knee replacement done by orthopedic surgeon Moody in February 2012 and a left knee implanted a week afterward.

His right knee became painful and wobbly about four years later and a second surgeon replaced it in August 2016. The left knee gave out in November 2020, also requiring replacement, according to the suit.

Despite the revisions, Nuzzo lives with “daily knee pain and discomfort,” which limits his “activities of daily living and recreation,” according to the suit. The case is pending. As of mid-September, Exactech had not filed an answer.

In advertising directed at surgeons, Exactech boasts about the long life of its implants.

One sales brochure states that the Optetrak “demonstrated 91-99 percent implant survival rates” over just under a decade. That is consistent with, if not superior to, industry standards, though as a rule of thumb many surgeons expect implants to last 15 to 20 years, sometimes longer.

The mounting legal claims allege many Exactech knee and hip implants have worn out well before their time.

The KFF Health News analysis of more than 300 pending cases in Alachua County found that surgeons removed about 200 implants after less than seven years. Some people in the sample, whose surgeries spanned more than two dozen states, were awaiting revision procedures. In the federal court sample, patients alleged that half of the 400 implants that were removed lasted less than six years.

Advertising materials aside, Exactech is circumspect in describing the reliability of its implants when it speaks to courts. In a 2021 filing, the company noted that the Optetrak comes with no express warranty.

How long it lasts “depends on a multitude of factors, including those pertaining to surgical technique and the particular patient,” the company said.

Consulting Fees

Exactech’s focus on its surgeon customers includes paying handsome consulting fees to some orthopedists who have used the company’s implants in the operating room or promoted them in advertising.

Exactech paid surgeon consultants $23.2 million combined from the start of 2013 through the end of 2022, the most recent year available, according to a government database called Open Payments.

In promoting the Optetrak in sales materials, Exactech touted “excellent results” achieved by orthopedic surgeon Raymond Robinson. Left unsaid: Exactech paid Robinson more than $900,000 in consulting fees and other payments from 2013 through 2022. In a court filing, Exactech denied any consultants “were compensated in exchange for product promotion.” Robinson could not be reached for comment.

Exactech’s sales brochures also boast that surgeons “around the world have documented excellent results with the Optetrak knee system.”

Yet Exactech bottled up a succession of sharply negative reports from other countries, while working to discredit others, according to internal company records filed in court by the whistleblowers.

One surgery group in France concluded in 2012 that nine of 110 Optetrak procedures required revision due to loosening in under three years, for instance. Exactech disputed the findings in a published response, and in a court filing said the conclusions were “based on incorrect information and a flawed understanding of the true causes.”

A hospital in Buenos Aires, Argentina, reported that 25% to 30% of Optetrak knees required revisions in under two years, according to whistleblower Fuentes.

The Australian implant registry criticized Optetrak’s reliability as early as 2007 and in several later years. In response, Exactech executives said in depositions and court filings that they traced many of the poor results to a single hospital and three surgeons who failed to align the implants correctly.

The Australian registry pegged Exactech’s revision rate at 19.4% at seven years and 22% at 10 years, the worst of any knee implant on the market, which led the government health system to stop purchasing it, court records allege. Exactech denied the allegations in a court filing.

James Brooks, a retired Texas orthopedic surgeon, said in a court affidavit that he believed Exactech had an obligation to tell surgeons about the poor outcomes overseas rather than touting rosy results tied to doctors on its payroll.

In the 2021 affidavit, Brooks recalled implanting the Optetrak knee in a Dallas man in 2011, only to confirm from X-rays that it was failing in 2017 and needed to be replaced two years later. Brooks said he would have steered clear of Optetrak had he known of its “much higher failure rate than comparable products.”

‘Dear Patient’

Laura Grandis is suing Ohio orthopedic surgeon and Exactech consultant Ian Gradisar, who received $132,720 from the company, including research payments, from 2013 through 2022, according to government records.

Gradisar’s father, Ivan, also an orthopedic surgeon, served on the original Optetrak design team. In 2008, Ian Gradisar helped his father with an audit of “patient outcomes” commissioned by Exactech. The audit showed that 12 of 47 Optetrak patients operated on over the course of 15 months required revisions, giving the son “first-hand knowledge of the failing and defective Optetrak,” Grandis alleges in her suit.

Ian Gradisar put an Exactech implant in Grandis’ left knee in Akron, Ohio, in November 2020.

In early 2021, she had “severe” pain in her knee and needed a cane or a walker to get around, according to the suit.

Gradisar told her the knee had failed, which he said was “very rare and only happened 5% of the time,” according to the suit.

Grandis had revision surgery in July 2021 with an Optetrak implant. Some seven months later, she felt pain that worsened throughout the day. She tried ice and rest, but that did not work. Her knee hurt when she put weight on it and started making a clicking sound when she moved, according to the suit.

In June 2022, Grandis received a “Dear Patient” form letter from the hospital where her surgery was performed notifying her of the Exactech recall.

Gradisar’s office told her the surgeon could not see her until October 2022 “as he was inundated with phone calls from patients about the Exactech recall,” according to the suit.

In response to the suit, Exactech denied the allegations, including that its knee implants had “increased failure rates.” The case is pending. Gradisar and his lawyer did not respond to requests for comment.

But in a court filing, Gradisar denied any defects in the implant and said he “provided quality care and treatment” to Grandis.

In December 2022, Grandis ended up having a second revision operation that kept her hobbling around on crutches for six weeks, according to her suit.

Total Recall

Two years after the initial recall, Exactech and its owners — past and present — face a rush of lawsuits demanding accountability for alleged patient injuries.

Most of the suits in the Alachua County group name Bill, Betty, and David Petty and Miller as defendants for their roles at Exactech. Their attorney did not respond to requests for comment, but in May, the defendants jointly filed a motion to dismiss, arguing that the suits fail “to allege sufficient facts to impose liability.”

Many suits in the federal court cluster also name as a defendant TPG Capital, a Texas-based private equity firm that paid $737 million to acquire Exactech in February 2018. TPG declined to comment but has filed a motion to dismiss the cases.

In one recall letter sent to surgeons, Exactech acknowledged that the data from the Australian registry confirmed that Optetrak had “statistically significant” higher rates of revisions than knee implants made by other companies — a conclusion it had previously disputed.

The letter adds that Exactech is “uncertain” if the packaging defect is the “root cause” of Optetrak’s poor performance. An FDA “safety communication” issued in March said the agency is working with Exactech to assess whether other implants packaged in the defective bags pose similar risks.

Exactech lawyers say the company may not be to blame for every implant that wears out unexpectedly.

In a November 2022 hearing, Exactech attorney Michael Kanute said wear of polyethylene implant components is a “known risk no matter who makes them.” He said the patient’s size and activity level as well as the technique of the surgeons could also be factors.

“So every case is different,” he said.

KFF Health News is a national newsroom that produces in-depth journalism about health issues.

Experimental Gel Could Replace Damaged Knee Cartilage

By Pat Anson, PNN Editor

Clinical trials on humans may begin as soon as next year on an experimental hydrogel designed to replace damaged cartilage in arthritic knees, according to researchers at Duke University, who say the gel is up to three times stronger than natural cartilage.   

Implants made of the material are currently being tested on sheep by Sparta Biomedical, a medical device company that is developing a line of synthetic cartilage.

“If everything goes according to plan, the clinical trial should start as soon as April 2023,”  Benjamin Wiley, PhD, Sparta’s chief technology officer and a Duke chemistry professor, said in a press release. “I think this will be a dramatic change in treatment for people.”

Wiley says hydrogel implants could someday be used as an alternative to total knee replacement surgery, one of the fastest growing elective procedures in the United States. About one in six adults suffer from knee osteoarthritis, a painful disorder that leads to thinning of cartilage and progressive joint damage.

Often considered the treatment of last resort, knee replacement surgery can be problematic. Studies have found that about a third of the patients who have their knees replaced continue to experience chronic pain. The artificial joints also have a limited life span and sometimes need to be replaced after a few years.   

“There's just not very good options out there,” said Wiley.

To make the hydrogel, Wiley and his team took thin sheets of cellulose fibers and infused them with a water absorbing polymer, creating a Jello-like material that is surprisingly strong. The cellulose fibers act like the collagen in natural cartilage, giving the gel strength when pulled or stretched.

Natural cartilage can withstand up to 8,500 pounds per inch of tugging and squishing before reaching a breaking point. The hydrogel can handle even more pressure and is 66% stronger than cartilage when compressed, the equivalent of parking a car on a postage stamp.

“It’s really off the charts in terms of hydrogel strength,” Wiley says.

Duke researchers first reported in 2020 that they had developed a hydrogel strong enough for knees, but using it to replace cartilage presented some design challenges. Hydrogels are difficult to attach directly to bone or cartilage to keep them from breaking loose or sliding off during intense activities.

They got around that problem by cementing and clamping the hydrogel to a titanium base, which is then anchored into a small hole where the damaged cartilage used to be. Tests showed the design stays fastened 68% more firmly than natural cartilage on bone.

In wear tests, the researchers took the hydrogel and natural cartilage and spun them against each other a million times, with a pressure similar to what the knee experiences during walking. Using high-resolution X-ray imaging, they found that the artificial cartilage held up three times better than the real thing.

DUKE UNIVERSITY IMAGE

And because the hydrogel mimics the smooth and cushiony nature of real cartilage, it protects other joint surfaces from being damaged as they slide against the implant. Other researchers have tried replacing cartilage with implants made of metal or polyethylene, but because those materials are stiffer than cartilage, they can chafe against other parts of the knee.

The research study, published in the journal Advanced Functional Materials, was funded by Sparta Biomedical and Duke University.

An experimental gel also shows promise as a treatment for low back pain caused by degenerative disc disease, according to a recent small study. Hydrafil – an injectable gel developed by ReGelTec – fills in cracks and tears in damaged discs, restoring the disc’s structural integrity. The injection procedure is minimally invasive and only takes about 30 minutes.

Hospitals Hit Hard by Loss of Joint Replacement Surgeries

By Bernard J. Wolfson, Kaiser Health News

Dr. Ira Weintraub, a recently retired orthopedic surgeon who now works at a medical billing consultancy, saw a hip replacement bill for over $400,000 earlier this year.

“The patient stayed in the hospital 17 days, which is only 17 times normal. The bill got paid,” mused Weintraub, chief medical officer of Portland, Oregon-based WellRithms, which helps self-funded employers and workers’ compensation insurers make sense of large, complex medical bills and ensure they pay the fair amount.

Charges like that go a long way toward explaining why hospitals are eager to restore joint replacements to pre-COVID levels as quickly as possible — an eagerness tempered only by safety concerns amid a resurgence of the coronavirus in some regions of the country. Revenue losses at hospitals and outpatient surgery centers may have exceeded $5 billion from canceled knee and hip replacements alone during a roughly two-month hiatus on elective procedures earlier this year.

The cost of joint replacement surgery varies widely — though, on average, it is in the tens, not hundreds, of thousands of dollars. Still, given the high and rapidly growing volume, it’s easy to see why joint replacement operations have become a vital chunk of revenue at most U.S. hospitals.

The rate of knee and hip replacements more than doubled from 2000 to 2015, according to inpatient discharge data from the Agency for Healthcare Research and Quality. And that growth is likely to continue: Knee replacements are expected to triple between now and 2040, with hip replacements not far behind, according to projections published last year in the Journal of Rheumatology.

Joint procedures are usually not emergencies, and they were among the first to be scrubbed or delayed when hospitals froze elective surgeries in March — and again in July in some areas plagued by renewed COVID outbreaks. Loss of the revenue has hit hospitals hard, and regaining it will be crucial to their financial convalescence.

“Without orthopedic volumes returning to something near their pre-pandemic levels, it will make it difficult for health systems to get back to anywhere near break-even from a bottom-line perspective,” said Stephen Thome, a principal in health care consulting at Grant Thornton, an advisory, audit and tax firm.

Billions in Revenue Lost

It’s impossible to know exactly how much knee and hip replacements are worth to hospitals, because no definitive data on total volume or price exists.

But using published estimates of volume, extrapolating average commercial payments from published Medicare rates based on a study, and making an educated guess of patient coinsurance, Thome helped KHN arrive at an annual market value for American hospitals and surgery centers of between $15.5 billion and $21.5 billion for knee replacements alone.

That suggests a revenue loss of $1.3 billion to $1.8 billion per month for the period the surgeries were shut down. These figures include ambulatory surgery centers not owned by hospitals, which also suspended most operations in late March, all of April and into May.

If you add hip replacements, which account for about half the volume of knees and are paid at similar rates, the total annual value rises to a range of $23 billion to $32 billion, with monthly revenue losses from $1.9 billion to $2.7 billion.

The American Hospital Association projects total revenue lost at U.S. hospitals will reach $323 billion by year’s end, not counting additional losses from surgeries canceled during the current coronavirus spike. That amount is partially offset by $69 billion in federal relief dollars hospitals have received so far, according to the association. The California Hospital Association puts the net revenue loss for hospitals in that state at about $10.5 billion, said spokesperson Jan Emerson-Shea.

Hospitals resumed joint replacement surgeries in early to mid-May, with the timing and ramp-up speed varying by region and hospital. Some hospitals restored volume quickly; others took a more cautious route and continue to lose revenue. Still others have had to shut down again.

At the NYU Langone Orthopedic Hospital in New York City, “people are starting to come in and you see the operating rooms full again,” said Dr. Claudette Lajam, chief orthopedic safety officer.

At St. Jude Medical Center in Fullerton, California, where the coronavirus is raging, inpatient joint replacements resumed in the second or third week of May — cautiously at first, but volume is “very close to pre-pandemic levels at this point,” said Dr. Kevin Khajavi, chairman of the hospital’s orthopedic surgery department. However, “we are constantly monitoring the situation to determine if we have to scale back once again,” he said.

In large swaths of Texas, elective surgeries were once again suspended in July because of the COVID-19 resurgence. The same is true at many hospitals in Florida, Alabama, South Carolina and Nevada.

The Mayo Clinic in Phoenix suspended nonemergency joint replacement surgeries in early July. It resumed outpatient replacement procedures the week of July 27, but still has not resumed nonemergency inpatient procedures, said Dr. Mark Spangehl, an orthopedic surgeon there. In terms of medical urgency, joint replacements are “at the bottom of the totem pole,” Spangehl said.

In terms of cash flow, however, joint replacements are decidedly not at the bottom of the totem pole. They have become a cash cow as the number of patients undergoing them has skyrocketed in recent decades.

‘Industrial-Scale’ Surgeries

The volume is being driven by an aging population, an epidemic of obesity and a significant rise in the number of younger people replacing joints worn out by years of sports and exercise.

It’s also being driven by the cash. Once only done in hospitals, the operations are now increasingly performed at ambulatory surgery centers — especially on younger, healthier patients who don’t require hospitalization.

The surgery centers are often physician-owned, but private equity groups such as Bain Capital and KKR & Co. have taken an interest in them, drawn by their high growth potential, robust financial returns and ability to offer competitive prices.

“Generally the savings should be very good — but I do see a lot of outlier surgery centers where they are charging exorbitant amounts of money — $100,000 wouldn’t be too much,” said WellRithm’s Weintraub, who co-owned such a surgery center in Portland.

After canceling his hip replacement surgery in March because of COVID-19, Matthew Davis overcame his concerns and rescheduled in June because the procedure was performed at an outpatient surgery center, which meant no overnight hospital stay. (Matthew Davis)

Fear of catching the coronavirus in a hospital is reinforcing the outpatient trend. Matthew Davis, a 58-year-old resident of Washington, D.C., was scheduled for a hip replacement on March 30 but got cold feet because of COVID-19, and canceled just before all elective surgeries were halted. When it came time to reschedule in June, he overcame his reservations in large part because the surgeon planned to perform the procedure at a free-standing surgery center.

“That was key to me — avoiding an overnight hospital stay to minimize my exposure,” Davis said. “These joint replacements are almost industrial-scale. They are cranking out joint replacements 9 to 5. I went in at 6:30 a.m. and I was walking out the door at 11:30.”

Joint Replacement Often Unnecessary

Acutely aware of the financial benefits, hospitals and surgery clinics have been marketing joint replacements for years, competing for coveted rankings and running ads that show healthy aging people, all smiles, engaged in vigorous activity.

However, a 2014 study concluded that one-third of knee replacements were not warranted, mainly because the symptoms of the patients were not severe enough to justify the procedures.

“The whole marketing of health care is so manipulative to the consuming public,” said Lisa McGiffert, a longtime consumer advocate and co-founder of the Patient Safety Action Network. “People might be encouraged to get a knee replacement, when in reality something less invasive could have improved their condition.”

McGiffert recounted a conversation with an orthopedic surgeon in Washington state who told her about a patient who requested a knee replacement, even though he had not tried any lower-impact treatments to fix the problem.

“I asked the surgeon, ‘You didn’t do it, did you?’ And he said, ‘Of course I did. He would just have gone to somebody else.’”

Kaiser Health News, a nonprofit health newsroom whose stories appear in news outlets nationwide, is an editorially independent part of the Kaiser Family Foundation.

Experimental Drug Rebuilds Cartilage in Knee Osteoarthritis Patients

By Pat Anson, PNN Editor

An experimental treatment shows promise in slowing the progression of knee osteoarthritis by increasing the thickness of cartilage in the knee joint, according to results of an early clinical trial published in the Journal of the American Medical Association (JAMA).

Researchers at the University of Maryland School of Medicine gave 549 volunteers with knee osteoarthritis injections of the drug sprifermin or a placebo. Sprifermin is a disease modifying drug that stimulated the production of cartilage-producing cells in animal studies.

The researchers found that participants who received a 100 microgram dose of sprifermin either twice or once yearly experienced a statistically significant but slight gain in joint cartilage thickness after two years.  Those given smaller doses had smaller gains in cartilage that were not statistically or clinically significant.

"While the increase in cartilage thickness is a positive sign, we do not know at this point whether it has any clinical significance," said lead investigator Marc Hochberg, MD, a Professor of Medicine at UMSOM. "It is not known whether those who experience increased cartilage thickness over time will be able to avoid or delay knee replacement surgery."

Interestingly, patients treated with a high dose of sprifermin did not experience any significant improvement in their arthritis symptoms – such as pain and stiffness -- compared to those given lower doses or placebo injections.

All of the injections were stopped after 18 months. The Phase 2 study is designed to continue for a total of five years and future analyses of the findings are planned.

About 10 percent of Americans over age 60 have knee osteoarthritis, a progressive condition caused by the breakdown of joint cartilage. Knee osteoarthritis causes pain, physical disability, lower quality of life and is associated with early death and cardiovascular problems.

The pain is usually treated with over-the-counter pain relievers, anti-inflammatory drugs, steroid injections, and sometimes surgery. No disease-modifying osteoarthritis drugs have been approved in the United States or Europe.

Arthroscopic and knee replacement surgeries are increasingly being used to treat knee osteoarthritis. But a number of recent studies have found the arthroscopic surgery does not relieve knee pain any better than physical therapy or over-the-counter pain relievers. Researchers have also found that about a third of patients who had knee replacement surgery continued to have pain after the procedure.

Stem Cells Reduce Pain from Knee Osteoarthritis

By Pat Anson, PNN Editor

A small new study has demonstrated that stem cells collected from a patient’s own bone marrow can significantly reduce pain caused by osteoarthritis of the knee.

In the first clinical trial of its kind in Canada, researchers collected mesenchymal stromal cells (MSCs) from the spines of 12 middle-aged patients with moderate to severe knee osteoarthritis. These “autologous” cells – stem cells derived from a patient’s own fat or bone tissue – were then processed and injected back into the patients’ knees at different doses.

Researchers then followed the patients for the next 12 months, using MRI imaging, biomarkers, molecular fingerprinting and the patient's own assessment of how they felt.

"Our goal was to test for safety as well as to gain a better understanding of MSC dosing, mechanisms of action and donor selection," said lead author Sowmya Viswanathan, PhD, Arthritis Program at the Krembil Research Institute, University Health Network in Toronto.

At the end of the study period, researchers said there were significant improvements in all 12 patients’ pain levels, stiffness and quality of life. The study also showed that the MSCs were safe at all the doses tested and that the higher the dose, the more effective the outcome.

"We also obtained novel insights into a potential anti-inflammatory mechanism of action of these cells in osteoarthritic knee joints. We noted that donor heterogeneity is an important factor, and our assembled panel of genes helps us identify cells which are potent in osteoarthritis. These are important findings which we hope to translate into a larger, powered clinical trial as part of our next steps," said Viswanathan, who reported the findings in the journal Stem Cells Translational Medicine.

Over 250 million people worldwide suffer from knee osteoarthritis (OA), which causes thinning of cartilage and progressive joint damage. Nearly 40 percent of Americans over the age of 45 have some degree of knee OA.

Knee replacement and arthroscopic knee surgeries are commonly used to treat knee OA, even though many studies show they have limited effectiveness. A 2017 study in The British Medical Journal  of over 7,400 patients who had knee replacement surgery found the procedure often had minimal effects on quality of life and wasn’t worth the cost.

Arthroscopic surgery is less invasive than a total knee replacement, but studies also show it is often not effective. In 2017, an international panel of experts reviewed 25 studies involving nearly two million patients and concluded that arthroscopic surgery does not improve long term pain or function in patients with knee conditions such as osteoarthritis.

Because these conventional treatments often fail, there is growing interest in the use of stem cells to treat knee problems. The FDA, however, takes a dim view of autologous stem cells and released guidance in 2017 that requires the cells to undergo “minimal manipulation.”

The FDA recently sent letters to 20 stem cell manufacturers and clinics warning them they were violating FDA regulations. The agency says the science behind autologous cells is still in its early stages and they have not been proven to be safe and effective.

“There’s a false premise being asserted by some in the field that a product derived from a person’s own body and then manipulated and reinserted for another use different from the one it played in its original location is not subject to FDA regulation just because it originated from the person it was given back to,” then FDA commissioner Scott Gottlieb, MD, and Biologics Center Director Peter Marks, MD, said in a statement.

“We’ve seen too many cases of sponsors claiming that cells aren’t subject to FDA regulation just because the cells originated from the same patient to whom the eventual manufactured product is being given. And we’ve seen too many cases of companies making unsubstantiated claims that these treatments prevent, treat, cure or mitigate disease where the products have sometimes led to serious patient harm.”

One Third of Knee Surgery Patients Still Have Pain

By Liz Szabo, Kaiser Health News

Danette Lake thought surgery would relieve the pain in her knees.

The arthritis pain began as a dull ache in her early 40s, brought on largely by the pressure of unwanted weight. Lake managed to lose 200 pounds through dieting and exercise, but the pain in her knees persisted.

A sexual assault two years ago left Lake with physical and psychological trauma. She damaged her knees while fighting off her attacker, who had broken into her home. Although she managed to escape, her knees never recovered. At times, the sharp pain drove her to the emergency room. Lake’s job, which involved loading luggage onto airplanes, often left her in misery.

When a doctor said that knee replacement would reduce her arthritis pain by 75 percent, Lake was overjoyed.

“I thought the knee replacement was going to be a cure,” said Lake, now 52 and living in rural Iowa. “I got all excited, thinking, ‘Finally, the pain is going to end and I will have some quality of life.’”

But one year after surgery on her right knee, Lake said she’s still suffering.

“I’m in constant pain, 24/7,” said Lake, who is too disabled to work. “There are times when I can’t even sleep.”

Most knee replacements are considered successful, and the procedure is known for being safe and cost-effective. Rates of the surgery doubled from 1999 to 2008, with 3.5 million procedures a year expected by 2030.

But Lake’s ordeal illustrates the surgery’s risks and limitations. Doctors are increasingly concerned that the procedure is overused and that its benefits have been oversold.

DANETTE LAKE (khn photo)

Research suggests that up to one-third of those who have knees replaced continue to experience chronic pain, while 1 in 5 are dissatisfied with the results. A study published last year in the BMJ found that knee replacement had “minimal effects on quality of life,” especially for patients with less severe arthritis.

One-third of patients who undergo knee replacement may not even be appropriate candidates for the procedure, because their arthritis symptoms aren’t severe enough to merit aggressive intervention, according to a 2014 study in Arthritis & Rheumatology.

“We do too many knee replacements,” said Dr. James Rickert, president of the Society for Patient Centered Orthopedics, which advocates for affordable health care, in an interview. “People will argue about the exact amount. But hardly anyone would argue that we don’t do too many.”

Although Americans are aging and getting heavier, those factors alone don’t explain the explosive growth in knee replacement. The increase may be fueled by a higher rate of injuries among younger patients and doctors’ greater willingness to operate on younger people, such as those in their 50s and early 60s, said Rickert, an orthopedic surgeon in Bedford, Ind. That shift has occurred because new implants can last longer — perhaps 20 years — before wearing out.

Yet even the newest models don’t last forever. Over time, implants can loosen and detach from the bone, causing pain. Plastic components of the artificial knee slowly wear out, creating debris that can cause inflammation. The wear and tear can cause the knee to break. Patients who remain obese after surgery can put extra pressure on implants, further shortening their lifespan.

The younger patients are, the more likely they are to “outlive” their knee implants and require a second surgery. Such “revision” procedures are more difficult to perform for many reasons, including the presence of scar tissue from the original surgery. Bone cement used in the first surgery also can be difficult to extract, and bones can fracture as the older artificial knee is removed, Rickert said.

Revisions are also more likely to cause complications. Among patients younger than 60, about 35 percent of men need a revision surgery, along with 20 percent of women, according to a November article in the Lancet.

Yet hospitals and surgery centers market knee replacements heavily, with ads that show patients running, bicycling, even playing basketball after the procedure, said Dr. Nicholas DiNubile, a Havertown, Pa., orthopedic surgeon specializing in sports medicine. While many people with artificial knees can return to moderate exercise — such as doubles tennis — it’s unrealistic to imagine them playing full-court basketball again, he said.

“Hospitals are all competing with each other,” DiNubile said. Marketing can mislead younger patients into thinking, “‘I’ll get a new joint and go back to doing everything I did before,’” he said. To Rickert, “medical advertising is a big part of the problem. Its purpose is to sell patients on the procedures.”

Rickert said that some patients are offered surgery they don’t need and that money can be a factor.

Knee replacements, which cost $31,000 on average, are “really crucial to the financial health of hospitals and doctors’ practices,” he said. “The doctor earns a lot more if they do the surgery.”

Ignoring Alternatives

Yet surgery isn’t the only way to treat arthritis.

Patients with early disease often benefit from over-the-counter pain relievers, dietary advice, physical therapy and education about their condition, said Daniel Riddle, a physical therapy researcher and professor at Virginia Commonwealth University in Richmond.

Studies show that these approaches can even help people with more severe arthritis.

In a study published in Osteoarthritis and Cartilage in April, researchers compared surgical and non-surgical treatments in 100 older patients eligible for knee replacement.

Over two years, all of the patients improved, whether they were offered surgery or a combination of non-surgical therapies. Patients randomly assigned to undergo immediate knee replacement did better, improving twice as much as those given combination therapy, as measured on standard medical tests of pain and functioning.

But surgery also carried risks. Surgical patients developed four times as many complications, including infections, blood clots or knee stiffness severe enough to require another medical procedure under anesthesia. In general, 1 in every 100 to 200 patients who undergo a knee replacement die within 90 days of surgery.

Significantly, most of those treated with non-surgical therapies were satisfied with their progress. Although all were eligible to have knee replacement later, two-thirds chose not to do it.

Tia Floyd Williams suffered from painful arthritis for 15 years before having a knee replaced in September 2017. Although the procedure seemed to go smoothly, her pain returned after about four months, spreading to her hips and lower back.

She was told she needed a second, more extensive surgery to put a rod in her lower leg, said Williams, 52, of Nashville.

“At this point, I thought I would be getting a second knee done, not redoing the first one,” Williams said.

Other patients, such as Ellen Stutts, are happy with their results. Stutts, in Durham, N.C., had one knee replaced in 2016 and the other replaced this year. “It’s definitely better than before the surgery,” Stutts said.

Inappropriate Surgeries

Doctors and economists are increasingly concerned about inappropriate joint surgery of all types, not just knees.

Inappropriate treatment doesn’t harm only patients; it harms the health care system by raising costs for everyone, said Dr. John Mafi, an assistant professor of medicine at the David Geffen School of Medicine at UCLA.

The 723,000 knee replacements performed in 2014 cost patients, insurers and taxpayers more than $40 billion. Those costs are projected to surge as the nation ages and grapples with the effects of the obesity epidemic, and an aging population.

To avoid inappropriate joint replacements, some health systems are developing “decision aids,” easy-to-understand written materials and videos about the risks, benefits and limits of surgery to help patients make more informed choices.

In 2009, Group Health introduced decision aids for patients considering joint replacement for hips and knees.

Blue Shield of California implemented a similar “shared decision-making” initiative.

Executives at the health plan have been especially concerned about the big increase in younger patients undergoing knee replacement surgery, said Henry Garlich, director of health care value solutions and enhanced clinical programs.

The percentage of knee replacements performed on people 45 to 64 increased from 30 percent in 2000 to 40 percent in 2015, according to the Agency for Healthcare Research and Quality.

Because the devices can wear out in as little as a few years, a younger person could outlive their knees and require a replacement, Garlich said. But “revision” surgeries are much more complicated procedures, with a higher risk of complications and failure.

“Patients think after they have a knee replacement, they will be competing in the Olympics,” Garlich said.

Danette Lake once planned to undergo knee replacement surgery on her other knee. Today, she’s not sure what to do. She is afraid of being disappointed by a second surgery.

Sometimes, she said, “I think, ‘I might as well just stay in pain.’”

Kaiser Health News, a nonprofit health newsroom whose stories appear in news outlets nationwide, is an editorially independent part of the Kaiser Family Foundation.

Study Questions Value of Knee Replacement Surgery

By Pat Anson, Editor

New research is raising questions about the value of knee replacement surgeries, one of the fastest growing elective procedures in the United States.

In an analysis of over 7,400 patients with osteoarthritis who had knee replacement surgeries, researchers concluded the procedure often had minimal effects on quality of life and wasn’t worth the cost. But when the surgeries are performed on patients with more severe knee pain, their effectiveness increases, researchers reported in The BMJ.

The annual rate of total knee replacements in the U.S. has doubled since 2000, with more than 640,000 surgeries now performed annually at a cost of $10.2 billion.

"Given its limited effectiveness in individuals with less severely affected physical function, performance of total knee replacement in these patients seems to be economically unjustifiable," wrote lead author Bart Ferket, MD, an assistant professor at the Icahn School of Medicine at Mount Sinai in New York City.

"Considerable cost savings could be made by limiting eligibility to patients with more symptomatic knee osteoarthritis,"

Osteoarthritis is a joint disorder that leads to thinning of cartilage and progressive joint damage. Nearly 40 percent of Americans over the age of 45 have some degree of knee osteoarthritis, and those numbers are expected to grow as the population ages.

Ferket and his colleagues found that about a third of the patients who had their knees replaced continued to experience chronic pain after the procedure. Their quality of life generally improved, but the change was small. The improvement in quality of life was higher when patients with lower physical scores before surgery were operated on.

“The practice of total knee replacement as performed in a recent U.S. cohort of patients with knee osteoarthritis had minimal effects on quality of life. If the procedure were restricted to patients with more severe functional status, however, its effectiveness would rise, with practice becoming economically more attractive,” they concluded.

"Our findings emphasize the need for more research comparing total knee replacement with less expensive, more conservative interventions, particularly in patients with less severe symptoms.”

Previous studies have also questioned the value of many knee surgeries. A five year study of 175 knee replacement patients by the National Institutes of Health found that over a third of the surgeries were inappropriate. Many patients had pain and other symptoms that were too mild to justify having their knees replaced.  

Another study found that arthroscopic knee surgery is “not an economically attractive treatment option” compared to physical therapy, exercise and medication.

In arthroscopic surgery, a doctor makes a small incision in the knee and inserts a tiny camera and instruments to repair damaged ligaments or torn meniscus. Arthroscopic surgery is far less invasive than a total knee replacement. Depending on insurance, hospital charges and the surgeon, arthroscopic surgeries cost about $4,000.  A total knee replacement costs about $28,000 according to HealthCare Bluebook.

Hospitals Accountable for Joint Replacement Surgeries

By Pat Anson, Editor

Hospitals will be held accountable for the cost and quality of care given to Medicare patients who undergo hip and knee replacement surgery under a pilot program by the Center for Medicare and Medicaid Services (CMS).

Hip and knee replacements are the most common inpatient surgery for Medicare beneficiaries. In 2014, there were more than 400,000 such procedures, costing Medicare more than $7 billion for hospitalizations alone. Post-surgery complications such as pain and infection often lead to hospital readmissions and extended recovery periods.

Under the Comprehensive Care for Joint Replacement (CJR) model, the hospital where the surgery takes place will be accountable for all services from the time of the surgery through 90 days after hospital discharge. This “bundling” of payments for hospitals, physicians, physical therapists and other health providers is meant to encourage them to work together to deliver more effective and efficient care.

Depending on the hospital’s quality and cost performance, the hospital will either earn a financial reward or be required to refund Medicare for a portion of the cost.

The quality and cost of care for hip and knee replacement surgeries can vary greatly. Currently the average Medicare expenditure for surgery, hospitalization, and recovery ranges from $16,500 to $33,000 across geographic areas. The rate of complications from infections or implant failures can be more than three times higher at some facilities than others.

“Incentives to coordinate the whole episode of care – from surgery to recovery – are not strong enough, and a patient’s health may suffer as a result,” CMS said in a statement. “When approaching care without seeing the big picture, there is a risk of missing crucial information or not coordinating across different care settings. This approach leads to more complications after surgery, higher readmission rates, protracted rehabilitative care, and variable costs. These are not the health outcomes patients want.”

The CJR model is being tested in 67 metropolitan areas throughout the country, and nearly all hospitals in those areas are required to participate. Patients will still be able to choose their doctor, hospital, nursing facility, home health service, and other providers. A list of all 67 areas can be found here.

The aging of the U.S. population is causing a surge in hip and knee replacement surgeries. Over a million joint replacement surgeries are currently performed annually – a number expected to surpass four million by 2030. 

Joint replacement surgery is generally conducted on the elderly to relieve pain from osteoarthritis, a painful and disabling condition caused by a loss of cartilage and the degradation of joints. Twenty-seven million Americans suffer from osteoarthritis.

Recent studies have questioned whether many of the surgeries are appropriate. A five year study of 175 knee replacement patients by the National Institutes of Health found that over a third of the surgeries were inappropriate, according to researchers who found that many patients had pain and other symptoms that were too mild to justify having their knees replaced.  Less than half (44%) of the knee replacement surgeries were classified as appropriate, with 22% rated inconclusive and 34% deemed inappropriate.

Racial Disparities Found in Joint Replacement Surgery

By Pat Anson, Editor

Black, Hispanic and Medicaid patients are significantly more likely to be readmitted to the hospital after total joint replacement (TJR) surgery, while women are less likely to suffer complications, according to new studies presented at the annual meeting of the American Academy of Orthopaedic Surgeons in Las Vegas.

In one study, researchers analyzed race and ethnic data on nearly 53,000 patients admitted to Connecticut hospitals for TJR from 2008 to 2012. The average patient was 67 years of age, white, female and covered by Medicare.

Patients who were African-American were 62% more likely to be readmitted to the hospital within 30 days of TJR. Hispanic patients were 50% more likely and Medicaid patients were 40% more likely to be readmitted than patients with private insurance.

"Our study shows that black patients who undergo total knee replacement may have poorer outcomes," said lead study author and orthopedic surgeon Courtland Lewis, MD. "After controlling for two key variables implicated in race and ethnic disparities in hospital readmission -- preoperative comorbidities and type of insurance coverage -- black patients still have a 35 percent higher likelihood of all-cause, 30-day readmission compared to white patients.”

Lewis said the disparity with white patients may be due to black patients having less access to primary care and less communication with health care providers.

Racial disparities in health care have long been documented, including that black patients utilize hip and total knee replacement at rates nearly 40 percent less than white patients, despite having higher rates of osteoarthritis—a leading cause of joint deterioration. Total hip and knee replacements are common surgical treatments for late-stage arthritis.

The overall 30-day readmission rate for patients in the study was about 5 percent. The most common reasons for readmission were postoperative infection, inflammatory reaction due to a joint prosthesis, hematoma complications, and dislocation of a prosthetic joint.

A second study looked at nearly 60,000 knee and hip replacements at a hospital in Ontario, Canada. Researchers found that men were 15% likely than women to return to the emergency department within 30 days of TJR surgery – even though women who had the surgery were older and more likely to be frail. Over half the patients in the study were women.

The findings contradict the theory that TJR is underutilized in female patients because they have worse outcomes then men.

"Despite the fact that women have a higher prevalence of advanced hip and knee arthritis, prior research indicates that North American women with arthritis are less likely to receive joint replacement than men," said lead study author Bheeshma Ravi, MD, an orthopaedic surgery resident at the University of Toronto. "One possible explanation is that women are less often offered or accept surgery because their risk of serious complications following surgery is greater than that of men.

"In this study, we found that while overall rates of serious complications were low for both groups, they were lower for women than for men for both hip and knee replacement, particularly the latter" said Dr. Ravi. "Thus, the previously documented sex difference utilization of TJR cannot be explained by differential risks of complications following surgery." 

Men in the study were found to be up 70 percent more likely to have a heart attack within three months of TJR surgery and 70 percent more likely to have an infection or require revision surgery within two years of a total knee replacement.