• Heart valves derived from transgenic pigs can be valuable for the preparation of tissue-engineered bioprostheses, because of their biomechanical properties, stability, reduced immune response, making them safer for clinical applications. (springer.com)
  • The stress performances of the stentless bioprostheses were similar to the mildly stenosed native aortic valve, whereas the performances of the stented and mechanical prostheses resembled that of native valves with mild-to-moderate stenoses. (bmj.com)
  • A device to provide body fluid flow control in the form of a valve to be located within a duct or passageway. (google.ca)
  • Bulk resilience about a passageway in a valve body provides the mechanism for controlled flow. (google.ca)
  • a valve support about the valve body and attached to the valve body and to the resilient seal, the passage being in communication with the passageway extending longitudinally through the frame. (google.ca)
  • METHODS: Between November 1991 and December 1995, 256 patients (mean age 59.9 +/- 9.8 years) underwent valve replacement with a Bicarbon valve prosthesis. (kuleuven.be)
  • An extracardiac pumping for supplementing the circulation of blood, including the cardiac output, in a patient without any component thereof being connected to the patient's heart, and methods of using same. (freepatentsonline.com)
  • attaching a replacement new heart valve prosthesis comprising a valve mechanism and integral suturing ring to the surgically attached suturing ring by suturing the integral suturing ring to the surgically attached suturing ring. (google.es)
  • If the clots float away from the valve where they can occlude blood flow to another part of the body, the clots are referred to as thromboembolism. (google.com)
  • Hemodynamic performance of a polyurethane heart valve prosthesis was evaluated in comparison with that of Bjork-Shiley Monostrut mechanical valve in steady flow representing the systolic peak flow phase. (koreascience.or.kr)
  • Normally, these valves open to let blood flow through or out of your heart, and then shut to keep it from flowing backward. (icdlist.com)
  • RESULTS: The flow results at the level of the prosthesis differed significantly from the reference flow acquired before the level of the prosthesis. (thepreparedminds.com)
  • Posted in Magnetic Resonance Imaging and tagged Heart Valve Prostheses , Phase Flow . (thepreparedminds.com)
  • In a condition known as mitral insufficiency, the mitral valve does not completely shut, and does not prevent the back-flow of blood to the left atrium from the left ventricle. (google.com)
  • One-way valve operation may be provided through a flap or through a pressure differential on the valve body depending upon the direction of flow. (google.ca)
  • 9 . The body fluid flow control device of claim 1 , the resilient seal, the valve body and the valve support being one piece. (google.ca)
  • 12 . The body fluid flow control device of claim 1 further comprising a flap attached to the valve body adjacent the passage and extending over the passage to restrict flow to one direction through the passage. (google.ca)
  • Natural heart valves are evolved to forms that perform the functional requirement of inducing unidirectional blood flow through the valve structure from one chamber of the heart to another. (wikipedia.org)
  • Tissue heart valves, in contrast, do not require the use of anticoagulant drugs due to the improved blood flow dynamics resulting in less red cell damage and hence less clot formation. (wikipedia.org)
  • When blood pressure in the chamber of the heart exceeds that of the pressure on the outside of the chamber the ball is pushed against the cage and allows blood to flow. (wikipedia.org)
  • Caged ball valves have a high tendency to form blood clots, so the patient must have a high degree of anti-coagulation, usually with a target INR of 2.5-3.5. (wikipedia.org)
  • 8. The apparatus of claim 4, further comprising a plurality of features extending through the outer sheath generally radially from the base portion to help maintain the apparatus at a desired position relative to the heart valve when the apparatus is implanted in the heart valve. (freepatentsonline.com)
  • DESCRIPTION (provided by applicant): Obesity is a well-established risk factor for a number of diseases, including type 2 diabetes and coronary heart disease. (sbir.gov)
  • Pressure losses through the valves were obtained from the streamwise pressure distributions downstream of the valves. (koreascience.or.kr)
  • BY examining the velocity and Reynolds shear stress fields downstream of the polyurethane heart valve, it is known that there is a large recirculation region near the valve and high shear stress regions exist at the interface between strong axial jet flows along the wall and vortical flows in the central area. (koreascience.or.kr)
  • citation needed] Tilting disk valves have a single circular occluder controlled by a metal strut. (wikipedia.org)
  • citation needed] However, current mechanical heart valves all require lifelong treatment with anticoagulants (blood thinners), e.g. warfarin, which requires monthly blood tests to monitor. (wikipedia.org)