Showing posts with label Myxo. Show all posts
Showing posts with label Myxo. Show all posts

Saturday, September 1, 2012

How about a Lemon Law for medical devices?

Gigamole was delighted to read about the Lemon Law for Singapore. Kicks in today! Gigamole wonders why it had taken so long to want to protect consumers, but ne'er mind, better later than never.

Gigamole also wonders how the Lemon Law might protect the patient consumers from faulty medical devices such as heart stents, and other prostheses. It would seem that that the prostheses itself should be covered under the current Lemon Law, since the patient did "purchase" a device. The surgery to implant the device is not covered, as it would be a "service". On the other hand, the surgeon would actually be the retailer of the device, so should be responsible for the replacement of the device if it were faulty within 6 months.

The problem with medical devices is that defects often do not reveal themselves within 6 months. So the patient often has to shoulder the burden of proving that the defect did not live up to expectations of quality.

This raises a further question of who actually provides assurance of quality of the product and who protects the patient consumer from exploitation by manufacturers. One may expect that the HSA, as the government regulator to provide assurances that any device entering the market has an acceptable level of quality and safety. But this is not the case at the moment. The nascent attempts to regulate medical devices ran into bad publicity, and the HSA has since appeared to shrink from doing the right thing.

So now no one knows if the medical devices that are stuck into a patient's body is of acceptable quality and safety. No one knows who is actually protecting the patient consumer. Recently Gigamole has flagged up issues with metal on metal hip implants, transvaginal meshes, cardiac stimulators, heart valves, which have increasingly been cited in various regulatory withdrawals and law suits overseas. But locally, there has only been a deathly silence from the HSA. So no one apparently wants to inform the patient consumer the bad news. No one wants to point the finger at surgeons for retailing faulty devices. Seems to be that the patient's only recourse is through litigation. Even so,  there should be adequate awareness among patient-consumers that there is a problem. Sadly, there is so little local information available for the patient-consumer to use. HSA's silence is certainly not helpful.

Gigamole believes we need a Lemon Law for medical devices. But not just a law,  we need a healthy consumer protection movement for drugs and medical devices.

Friday, June 8, 2012

More loopy unregulated medical devices horror stories - the Myxo annuloplasty ring

Gigamole had posted previously on the Edwards SAPIEN heart valve operation recently carried out at the National Heart Centre. It seems that the Edwards Lifesciences company has been getting into all kinds of problems recently also with respect to their Myxo annuloplasty ring. (Online references at the end of this post)

Essentially, the problem was triggered by the complaints from one patient at the Northwestern University research hospital, who claimed that the valve that was inserted into her heart in 2006 was not a FDA approved device, and she was not made aware that it was an experimental option. Furthermore, the surgeon who operated on her was an inventor of the valve and also received royalties from the marketing of the device. The fallout from her complaints have been significant and protracted. Although the university has denied any wrong doing, the patient's position has been supported by another of her doctors at Northwestern.

The background information, very simply outlined here, about this saga, are as follows:
a] In 2001, the FDA apparently rubber-stamped the industry's petition to reclassify heart valve annuloplasty rings to a lower risk category so that it can qualify for the 510(k) regulatory loophole. This meant that the industry can avoid doing clinical trials of an innovation if it can be shown to be insignificantly different from an earlier invention. Edwards Lifesciences used this loophole to launch their Myxo annuloplasty rings, even though they had filed for patents documenting significant differences from older versions.
b] Consequently, at the time the patient received the implant, the FDA did not even know of its existence. The FDA says it therefore never gave any approval. If it is an unapproved device, it should be regarded as an experimental device. The company and the university says it is not experimental, and that it did not require FDA approval under the 510(k) loophole. Meanwhile the surgeon has published the data as part of a clinical study.

The controversy continues to brew and has provoked cries for the FDA to review its approval procedures for medical devices.

Further readings here:
http://www.theheart.org/article/1230079.dohttp://www.theheart.org/article/960385.do http://articles.chicagotribune.com/2011-05-22/health/ct-met-medical-devices-20110521_1_annuloplasty-rings-faulty-heart-valve-diana-zuckerman
http://online.wsj.com/article/SB126151643854401921.html http://www.medicaldevicestoday.com/2009/07/medical-device-fda-510k-policy-modifications-faces-mounting-scrutiny-.html

What have all these got to do with us here in small, faraway Singapore?

For starters, we should not be too over-reliant on decisions made by FDA, and should develop our own opinions on the matter. This is not to say we have to duplicate all the evaluations, but merely we need to scrutinize all innovative medical devices to form our own opinion as to how much pre-marketing data is required. The FDA is wrong to say "... companies, not the agency, are best qualified to determine whether modifications affect a device's safety or effectiveness." Companies are motivated by self interest. Mostly of the commercial sort. Interestingly the HSA has a pdf file on this Myxo ring, but the file is mysteriously not accessible.

Secondly, doctors do not have the inalienable right to stick all kinds of experimental devices into patients with firstly getting ethics approval, and regulatory approval. It is unclear how many similar annuloplasty rings have been used on our patients without notification and approval of the HSA, or even ethics committees. It remains unclear whether the previously blogged about SAPIENS tricuspid valve prosthesis was approved by the ethics committee as an experimental procedure, since it was not an approved medical device.

Thirdly, proper informed consent by the patient is required. Gigamole notes the favorable developments recently to develop better informed consent procedures. This has been long overdue. Gigamole hopes that the consent process will make the distinction between routine accepted practice and experimental procedures using methods that have not been approved by the HSA. Patients are not all willing to be guinea pigs.

Just a parting trivia...... The company Edwards Lifesciences makes exciting new valves here in small faraway Singapore. Their factory in Changi North Crescent, opened in 2008.