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Implantable heart assist system and method of applying same
| Details |
Inventors: Bolling, Steven F.; Viole, Anthony; O'Leary, Shawn;
Assignee: Orqis Medical Corporation (Lake Forest, CA)
Primary Examiner: Layno; Carl
Assistant Examiner:
Attorney, Agent or Firm: Knobbe, Martens, Olson & Bear LLP
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. One embodiment provides a vascular graft that has a first end that is sized and configured to couple to a non-primary blood vessel and a second end that is fluidly coupled to a pump to conduct blood between the pump and the non-primary blood vessel. An outflow conduit is also provided that has a first end sized and configured to be positioned within the same or different blood vessel, whether primary or non-primary, through the vascular graft. The outflow conduit is fluidly coupled to the pump to conduct blood between the pump and the patient. The vascular graft may be connected to the blood vessel subcutaneously to permit application of the extracardiac pumping system in a minimally-invasive procedure. |
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DETAILED DESCRIPTION The object of the present invention is to address the aspect of CHF that results from altered pump function and abnormal circulatory dynamics while overcoming the limitations of prior art heart assist systems.
Without functioning as a bypass to one or more of a patient's organs, the present invention comprises an extracardiac pumping system for supplementing the circulation of blood through the patient without any component thereof being connected to the patient's heart or primary vessels.
Thus, it is extracardiac in nature.
With the ability to be applied within a minimally invasive procedure, the present invention significantly improves the condition of the patient suffering from CHF, resulting in the patient feeling much better, even where CHF continues.
By supplementing the pumping action of the heart, in lieu of replacing it, the various embodiments of the present invention take advantage of the pulsatile action of the heart, despite its weakened condition, to effectively deliver blood to body organs that benefit from pulsatile delivery of oxygenated blood.
As a result, the present invention is capable of being operated in a continuous flow fashion or, if desired, in a pulsatile flow fashion.
An ancillary but important benefit of the present invention is the ability to apply the present invention in such a way as to also reduce the pumping load on the heart and/or to reduce ventricular loading, thereby potentially permitting the heart to recover during use.
With the present invention, no bulky pump, valves or oxygenator are required, and no thoracic invasion with major cardiac surgery is required.
Indeed, a significant advantage of the present invention is its simplicity while achieving extraordinary results in improving the condition of a patient suffering from CHF.
It is contemplated that the present invention be applied such that the heart experiences a reduced pressure at the aortic root during systole (afterload) and/or a reduced left ventricular end diastolic pressure (pre-load), thus reducing the hemodynamic burden or workload on the heart and, thus, permitting the heart to recover
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Heart Surgery 
