Patents by Inventor Adrian Kantrowitz

Adrian Kantrowitz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4809681
    Abstract: A pair of spaced electrodes are disposed inside the thoracic aorta near the heart and are used to sense R- and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position, which is that where R- and P-waves are sensed to have the same magnitude, the P-wave, which occurs earlier than the R-wave, serving as means for accurately predicting the occurrence of the R-wave. The electrodes are affixed to the distal end of an intra-aortic balloon, which is capable of being disposed at the ideal position by monitoring of the R- and P-waves sensed by the electrodes. The balloon is deflated at the occurrence of the R-wave, which has been correctly predicted by the earlier P-wave.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: March 7, 1989
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Adrian Kantrowitz, Paul S. Freed, Hiroyuki Tachi, Akira Suzuki
  • Patent number: 4733652
    Abstract: An intra-aortic balloon pump apparatus includes a first catheter one end of which is secured to a connector having a gas supply port, a balloon one end of which is secured to the distal end of the first catheter, a central tubular member the distal end of which projects from the distal end of the first catheter and to which the distal end of the balloon is fixedly secured, a second catheter freely insertable into the central tubular member and having a distal end provided with an arterial pressure transduceer, and a second connector to which the other end of the second catheter is secured for feeding a signal from the pressure transducer to the outside of the apparatus. After the balloon, central tubular member and first catheter are placed into the aorta, the second catheter having the pressure transducer at its distal end is inserted through the interior of the central tubular member into the aorta.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: March 29, 1988
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Adrian Kantrowitz, Paul S. Freed, Avi Bar-Lev, Sadahiko Mushika, Akira Suzuki
  • Patent number: 4692148
    Abstract: An apparatus and method for placing an aortic balloon catheter is provided wherein a pair of spaced electrodes on the distal end of the catheter assembly are disposed inside a thoracic aorta near a patient's heart and are used to sense R-waves and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position where the R-waves and P-waves are sensed to have the same magnitude. The P-wave, occurring earlier than the R-wave, serves to accurately predict theoccurrence of the R-wave. The balloon of the catheter is deflated upon sensing the R-wave.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: September 8, 1987
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Adrian Kantrowitz, Paul S. Freed, Hiroyuki Tachi, Akira Suzuki
  • Patent number: 4634422
    Abstract: A percutaneous access device (PAD) is provided with a sleeve or separable member which may be detached from the device to enable the culturing of a multilayer fibroblast coating on the member in a stable and undisturbed environment. The member is constructed so that when it is assembled into the device and the device is implanted in a patient, the cultured coating of the member is exposed to the patient's dermis whose fibroblasts will, after a relatively short healing period, merge with the fibroblasts of the coating to form a barrier layer interlocked with the member to prevent epidermal ingrowth or marsupialization of the implanted device.Implantation techniques for further facilitating the formation of the dermal barrier are also disclosed.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: January 6, 1987
    Inventors: Adrian Kantrowitz, Paul S. Freed, Frizell L. Vaughan, Isadore A. Bernstein, Robert H. Gray
  • Patent number: 4630597
    Abstract: An improved dynamic aortic patch is constructed with an elongate semi-rigid shell member having a concave inner surface and a flexible membrane integrally bonded to the outer surface of the shell to define an inflatable and deflatable chamber between the concave inner surface and the membrane. The pumping capacity of the patch is determined by the concavity of the inner surface of the shell member, thus enabling the construction of a patch which may be implanted in the thoracic cavity (small concavity) or in the abdomen (large concavity). A fabric layer bonded to the membrane over the area overlying the outer surface of the shell has a peripheral suture flange projecting freely clear of the membrane, and a temporary shield adapted to overlie the fabric layer may be employed to assure that sutures placed to attach the patch within an opening in the aorta are not inadvertently passed through the membrane.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: December 23, 1986
    Inventors: Adrian Kantrowitz, Paul S. Freed
  • Patent number: 4092742
    Abstract: A prosthetic myocardium is disclosed for replacing necrotic or scarred myocardial tissue to positively simulate both myocardial contraction and expansion during systole and diastole. The prosthetic device includes several circumferentially arranged tilting arms which are sutured to the periphery of an opening in the heart formed by a medical excision. The tilting arms are pivotally supported and functionally interconnected with an axially reciprocal drive rod which effects synchronized inward and outward pivoting of the tilting arms to simulate the myocardial functions during heartbeat.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: June 6, 1978
    Assignee: Sinai Hospital of Detroit
    Inventors: Adrian Kantrowitz, Paul S. Freed
  • Patent number: 4051840
    Abstract: An improved dynamic aortic patch is surgically implanted in the thoracic aorta and is systematically inflated and deflated to generate pressure waves in the bloodstream. The pressure waves assist the heart by augmenting the circulation of the blood through the body. The patch includes a flexible inflatable bladder and an independent envelope. The envelope has a reinforced surface for limiting and directing inflation of the bladder inwardly toward the lumen of the aorta.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: October 4, 1977
    Assignee: Sinai Hospital of Detroit
    Inventors: Adrian Kantrowitz, Paul S. Freed