SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Biotech / Medical : World Heart Corp - WHRT and TSE/WHT
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Dan Hamilton who wrote (212)2/18/1999 8:16:00 PM
From: Mindshare  Read Replies (1) of 500
 
Dan,

I am very familiar with the DeBakey device. It's called the DeBakey VAD. It's a very small axial flow pump about the size of a D-cell battery (motor included). It spins at 10,000 - 12,000 RPM and pumps about 5 liters per minute at 100 mm Hg. The implants have gone extremely well with one patient making it to transplant recently. I don't know if its the clear winner, but it has a lot of advantages over large pulsatile pumps.

On the issue of pulsatility, for a VAD it really doesn't matter. The natural heart still provides a pulse. Animal studies have shown that a steady flow is acceptable if the total flow rate is about 20% higher than the pulsed flow rate. The issue is not completely resolved yet. Pulsaltility may be important in the long term (> 1 year). The DeBakey VAD has a unique feature which allows it to pump vigorously when the heart is contracting, but pumps less when the heart is filling. This "passive" pulse is better than the "forced" pulse of a pulsatile VAD.

There are some other articles I have, but I don't know how to provide the link in a message. Maybe you could let me know how?

The field of VAD's is heating up rapidly. The need is there and opportunity is huge. It will pay to keep up to date on the latest news like you are doing.

Best Regards,
Mindshare

+
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News