The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2002
Filed:
Jul. 19, 1999
Robert Jarvik, New York, NY (US);
Other;
Abstract
During coronary artery bypass grafting (CABG) surgery in cases when cardio-pulmonary bypass is not used, at times when the heart is manipulated or lifted the inflow to the right ventricle may be kinked and obstructed. Then flow across the lungs will decrease and left ventricular filling may output will be diminished. To avoid this problem a passive shunt, which in the preferred embodiment is a valved shunt, is used to conduct blood from the inferior vena cava (IVC) via the right atrium to the pulmonary artery (PA) bypassing the right ventricle. The shunt uses large diameter cannulae to keep its resistance low. The valve prevents blood from flowing from the PA into the IVC. The shunt may also use a manually actuated shutoff valve or may have a portion which can be clamped. During surgery, the patient may be fluid loaded so that the right atrial pressure is high, such as 25 mmHg. Then, with the shunt open, if the right ventricular inflow becomes obstructed during manipulation of the heart, blood will flow passively across the shunt and across the lungs. The shunt may also be used with a left ventricular bypass pump during CABG surgery.