A Simple Mechanical Pulse Duplicator for Cinematography of Cardiac Valves in Action
نویسندگان
چکیده
منابع مشابه
A Simple Versatile Pulse Duplicator.
Recent developments in the surgery of the heart valves have made the pulse duplicator an indispensable research tool; the duplicator also provides a useful aid in the teaching of the movements of normal and pathological heart valves. Many types have been described in the literature, and a review (Austen, Shaw, Scanrell, and Thurlbeck, 1958; Barnard, McKenzie, and de Villiers, 1959; Bjork, Inton...
متن کاملA mechanical pulse duplicator for testing prosthetic mitral and aortic valves.
The purpose of a prosthetic cardiac valve is to restore the function of a diseased aortic or mitral valve, and its role in haemodynamics is a passive one: the opening and closing of such a valve is strictly regulated by the pressure differences in the cardiac chambers which communicate through this valve. Therefore we consider that a prosthetic valve should be tested under conditions simulating...
متن کاملLow-intensity anticoagulation in mechanical cardiac prosthetic valves.
Retrospectively, we reviewed the charts of 101 patients at the University of Kansas Medical Center who received low-intensity anticoagulation for mechanical prosthetic valves implanted over a 17-yr period. The mean duration of follow-up was 4.6 yr, and the total duration of follow-up was 466.5 patient-yr. The patients' records were evaluated for evidence of hemorrhagic or thromboembolic complic...
متن کامل“design and Construction of a New Pulse Duplicator System for in Vitro Evaluation of Prosthetic Heart Valves – Conception of an Experimental Setup on Mitral Position”
Since most complications related to operation of prosthetic heart valves are due to disturbances of flow, its hydrodynamic characterization is a useful aid in the design of new prostheses. Besides durability and biological response to implant, these prostheses should provide a favorable hemodynamic profile, considering that there is a great clinical interest focused on the haemolysis of blood. ...
متن کاملmodification of nanoclay for improving the physico-mechanical properties of dental adhesives
هدف اصلی این مطالعه تهیه یک سامانه نوین چسب عاجی دندانی بر پایه نانورس پیوند شده با پلی متاکریلیک اسید، نانورس پیوند شده با پلی اکریلیک اسید، مخلوط نانوسیلیکا و نانورس پیوند شده با پلی متاکریلیک اسید، مخلوط نانوسیلیکا و نانورس پیوند شده با پلی اکریلیک اسید و نانورس پیوند شده با کیتوسان اصلاح شده با گلایسیدیل متاکریلات است. پیوند پلی متاکریلیک اسید و پلی اکریلیک اسید بر ری سطح نانورس در حضور و ...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annals of Surgery
سال: 1956
ISSN: 0003-4932
DOI: 10.1097/00000658-195604000-00017