Resources Contact Us Home
Heart valve with rectangular orifice

Image Number 4 for United States Patent #6699283.

A mechanical heart valve prosthesis has a generally rectangular orifice and two leaflets that move between a closed position nearly perpendicular to blood flow and an open position nearly parallel to blood flow. Due to the uniform dimension of a rectangle, the leaflets are hinged at the periphery of the orifice, and present a single large central flow region to the blood when opened. The base provides several means of constraining the leaflet rotation during opening and closing.

  Recently Added Patents
Electric power steering apparatus
Semiconductor memory device
Image reproduction system and image reproduction processing program
Display screen or portion thereof with graphical user interface
Subscribing to content
Radiation protective garment with forced ventilation and method
Terminal device and image printing method
  Randomly Featured Patents
Method of and apparatus for cell portion and cell fusion using radiofrequency electrical pulse
Secure wireless user localization scheme using transmission range variation
Compositions having pH-dependent viscosity, thickener systems containing the same, and uses therefor
Animal detection system and method
Foot control for snow plows
Apparatus for tracking predetermined data for updating a secondary data base
Loudspeaker for high frequencies
Battery charger
Isotopically altered optical fiber