1
Helmut Reul: Artificial heart valve. Medac Gesellschaft fur Klinische Spezialpraparate mbH, Cushman Darby and Cushman, September 29, 1981: US04291420 (305 worldwide citation)

An artificial, triple-lobed semilunar valve is disclosed for replacing the aortic or pulmonary valve in the heart. The valve includes a flexible suture ring which conforms to the shape of the aortic root and three flexible pockets which are mounted within the suture ring. When fluid flows through th ...


2
Hanns Pietsch, Holger Kartheus, Helmut Reul: Heart valve prosthesis. Beiersdorf Aktiengesellschaft, Sprung Horn Kramer & Woods, February 17, 1987: US04643732 (186 worldwide citation)

A heart valve prosthesis with a valve housing in the form of a ring and a curved valve which is mounted within the housing and which is hinged to the valve ring by means of a flat flexible small lug which, if appropriate, is drawn in one region through a slot in the valve ring, is characterized in t ...


3
Thorsten Siess, Helmut Reul, Gunther Rau, Michael Kast: Method and apparatus for cardiac blood flow assistance. Guidant Corporation, Fulwider Patton Lee & Utecht, June 15, 1999: US05911685 (126 worldwide citation)

An intravascular microaxial pump has an integrated configuration that enables both the drive unit as well as the pumping segment to be advanced through a patient's vasculature. The device includes elements that enhance pumping efficiency and performance while minimizing shear and cavitation. Cost re ...


4
Horst Peter Heimes, Helmut Reul: Pump assembly. Medac Gesellschaft fur Klinische Spezialpraparate mbH, Cushman Darby & Cushman, June 29, 1976: US03966358 (118 worldwide citation)

A pump assembly is disclosed which includes a pump which is externally controlled to vary with time the volume and/or the pressure of fluid pumped therethrough. A memory unit is programmed to provide a desired volume-time and/or pressure-time characteristic. The output of the memory is utilized to d ...


5
Hanns Pietsch, Holger Kartheus, Hans Joachim Holtzmann, Gunther Sachau, Helmut Reul: Heart valve prosthesis and process for its production. Beiersdorf, Sprung Horn Kramer & Woods, October 18, 1988: US04778461 (114 worldwide citation)

A heart valve prosthesis for replacing the aortic valve or the pulmonary valve, consisting of a support ring with at least two commissure supports in each case and flexible cusps, is characterized in that the height of the support ring including the commissure supports is less than the total height ...


6
Guenter Rau, Helmut Reul, Thorsten Siess: Intravascular blood pump. Impella Cardiotechnik, Fulwider Patton Lee & Utecht, January 23, 2001: US06176848 (112 worldwide citation)

A blood pump having a motor housing and a pump housing which are rigidly connected to one another in an axially spaced relationship. Both housings are of substantially the same diameter and are sized to enable the pump to be introduced via catheter through the body's blood-vessel system. The im ...


7
Thorsten Siess, Helmut Reul: Method and apparatus for cardiac blood flow assistance. Guidant Corporation, Fulwider Patton Lee & Utecht, October 12, 1999: US05964694 (110 worldwide citation)

An intravascular microaxial pump has an integrated configuration that enables both the drive unit as well as the pumping segment to be advanced through a patient's vasculature. The device includes elements that enhance pumping efficiency and performance while minimizing shear and cavitation. Cost re ...


8
Josef Jansen, Helmut Reul, Gunter Rau: Method of producing a closing member having flexible closing elements, especially a heart valve. Andrus Sceales Starke & Sawall, May 26, 1992: US05116564 (102 worldwide citation)

A method of producing flexible closing members, especially artificial heart valves, and a flexible closing member, especially an artificial heart valve, which can be produced according to such a method. According to the method of producing the housing of the closing member is radially expanded, the ...


9
Dieter Westphal, Helmut Reul, Guenter Rau: Blood pump as centrifugal pump. Baxter International, Diller Ramik & Wight PC, May 5, 1998: US05746575 (83 worldwide citation)

In a pump housing (10), the blood pump comprises an impeller (13) with a flat plate (30) and blades (34) projecting therefrom. The impeller (13) is supported between balls (18,20) forming an axial sliding bearing. The front wall (35) and the back wall (14) of the pump housing extend substantially pa ...


10
Thorsten Siess, Helmut Reul, Gunter Rau, Jens Hutzenlaub, Peter Brown: Cannula having constant wall thickness with increasing distal flexibility and method of making. Impella Cardiotechnik Aktiengesellschaft, Fulwider Patton Lee & Utecht, December 28, 1999: US06007478 (75 worldwide citation)

A cannula for use as for example on the inflow end of an implantable intravascular heart pump. The stiffness of the cannula is differentiated along its length, wherein its proximal end is stiffer than its distal end, while a substantially constant wall thickness is maintained along its entire length ...