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Publication numberUS3851646 A
Publication typeGrant
Publication dateDec 3, 1974
Filing dateApr 13, 1973
Priority dateApr 13, 1973
Publication numberUS 3851646 A, US 3851646A, US-A-3851646, US3851646 A, US3851646A
InventorsR Sarns
Original AssigneeSarns Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Connector for open heart surgery
US 3851646 A
Abstract
A connector for open heart surgery to allow blood from the superior vena cava and the inferior vena cava to pass to the pump oxygenator in a smooth and coordinated flow including a plastic connector body having a straight flow passage and parallel branch passages entering the body and joining the flow passage at spaced points but lying in the same plane and having about the same obtuse angle with the axis of the flow passage.
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States Patent [191 [451 Dec. 3, 1974 CONNECTOR F OR OPEN HEART SURGERY [75] Inventor: Richard N. Sarns, Ann Arbor, Mich. [731 Assignee: Sarns, Inc., Ann Arbor, Mich.

[22] Filed: Apr. 13, 1973 [2]] Appl. No.: 351,083

[52] US. Cl 128/214 R, 23/2585, 137/602, l28/DIG. 3, 285/150, 128/348 [51] Int. Cl. A61m 5/00, A61m 25/00, F161 41/02 [58] Field of Search... 23/2585; 128/DIG. 3, 214 R, 128/348; 137/602, 604; 285/150 56] References Cited UNITED STATES PATENTS 2,674,265 4/1954 Dennis 128/214 R UX 2,800,904 7/1957 Bellato 128/214 R 2,962,193 11/1960 Totten 128/214 R UX SUPER/01? FOREIGN PATENTS OR APPLICATIONS 695,784 8/1953 Great Britain 285/150 Primary ExaminerChanning L. Pace Attorney, Agent, or Firm-Barnes, Kisselle, Raisch & Choate [5 7] ABSTRACT A connector for open heart surgery to allow blood from the superior vena cava and the inferior vena cava to pass to the pump oxygenator in a smooth and coordinated flow including a plastic connector body having a straight flow passage and parallel branch passages entering the body and joining the flow passage at spaced points but lying in the same plane and having about the same obtuse angle with the axis of the flow passage.

1 Claim, 1 Drawing Figure Pal/91004919) 1 CONNECTOR FOR OPEN HEART SURGERY BACKGROUND OF THE INVENTION In open heart surgery, there are certain extracorporeal connections that must be made to cause the venous blood to divert from the heart and flow to a pump oxygenator which temporarily serves to perfonn the functions of the heart and lungs of the patient. In the past a standard Y-connector has been used to connect the inferior and superior vena cava to the oxygenator. Problems have developedwith this type of connector in that venous blood has sometimes bypassed the oxygenator by back flow in the Y-connector, thus destroying the efficiency of the support system for the patient.

THE DISCLOSAED INVENTION It is an object of the present invention to provide a venous connector which assures smooth and integrated flow from the heart connecting tubes and avoids any bypass or shunting of venous blood from the pump oxygenator.

Other objects of the invention will be apparent in the following description and claims taken with the accompanying drawing in which there are disclosed the principles of operation of the invention and the best mode presently contemplated for the practice thereof.

A drawing accompanies the disclosure and the single view illustrates the new connector and the relationship to the heart passages and the oxygenator.

In the drawing, a diagrammatic view of the heart illustrates aortic arch, pulmonary artery and pulmonary veins as well as the superior vena cava and inferior vena cava as the left side of the heart. When heart surgery is to take place, access is provided to the heart, and cannulae (hollow needles) are inserted into the inferior and the superior venae cavae. The surgeon punctures the wall of these passages and the cannulae in the form of plastic tubes are inserted into the respective passages and the walls of the passage are then tied or clamped around the tube to cause a diversion of the blood. The cannulae are then connected to the pump oxygenator.

In the drawing the inferior and superior venae cavae are shown at and 22 respectively and the cannulae are shown at 24 and 26. The closing ties are shown at 28 and 30.

The connector constructed in accordance with the present invention is shown having a body portion 32 in the form of an elongate plastic block having a blind hole or passage 34 which opens to a ribbed outer connector nipple 36. Two hollow side branches 38 and 40 are formed intergrally with the body extending in the same plane from one side of the body. These side branches are disposed at an obtuse angle A to the axis of the passage in body 32, this angle being preferably in the range of to Each end of the side branches 38 and 40 is provided with a ribbed connector surface to which the flexible cannulae tubes 24, 26 are fitted. The upper branch 38 enters passage 34 at approximately the blind end while the other branch 40 is spaced downwardly about 1 inch. The passage 34 is preferably about equal in area to the combined areas of the entering branch passages. The inside diameter of the cannula tube may vary with the patient but for an adult, it will be about 36 inch. The combined flow through the passage 34 may be as high as 5 liters per minute during an operation.

In a heart operation, it is easier, because of the limited space, to attach the cannulae to the same side of a connector, but it has also been discovered that the flow characteristics at the very low venous pressure (as distinguished from arterial pressure) are such that the best fluid dynamic conditions must prevail and experience has shown that there is a minimum of back pressure from either branch line against the flow of the other and a minimum of upstream pressure in comparison with the previously used Y-connectors. In addition, in clamping off either the upper or lower branch, fluid flowing freely through the open line develops less pressure on the line that is clamped.

I claim:

1. In apparatus for open heart surgery wherein cannulae are adapted to lead from the inferior vena cava and the superior vena cava, respectively, for transmitting low pressure venous blood to a tube leading to a pump oxygenator, the improvement which comprises:

a. a connector including an elongate body having an axial passage blind at one end of the body and open at the other end,

b. means at said other end for connection to the tube leading to the pump oxygenator,

c. a pair of spaced branch arms integrally connected with said body lying on one side of said body in a plane common to the axis of said axial passage and extending at an angle to said body and having passages to flow into said axial passage, one at about the blind end of said passage and the other spaced approximately an inch from said blind end, said arms having an obtuse angle of about 130 to 140 to the axis of said axial passage, and

d. means on the ends of said branch arms for connection of the respective cannulae from said inferior and superior venae cavae.

III

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2674265 *Apr 25, 1952Apr 6, 1954Lee Dennis RobertDiverter for blood transfusion apparatus
US2800904 *Jul 12, 1955Jul 30, 1957Emily G WhiteheadFeed circuit for surgical pumps
US2962193 *Dec 6, 1957Nov 29, 1960Trilex Engineering IncLiquid dispensing device
GB695784A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4129129 *Mar 18, 1977Dec 12, 1978Sarns, Inc.Venous return catheter and a method of using the same
US4217895 *May 26, 1978Aug 19, 1980Terumo CorporationIntravascular catheter
US4248224 *Aug 1, 1978Feb 3, 1981Jones James WDouble venous cannula
US4299217 *Dec 17, 1979Nov 10, 1981Terumo CorporationIntravascular catheter
US4586919 *Apr 6, 1984May 6, 1986Taheri Syde AExternal shunt and method for procuring and preserving the endothelium of a vein used in arterial bypass
US4639252 *Apr 5, 1985Jan 27, 1987Research Medical, Inc.Venous return catheter
US4823833 *Sep 11, 1984Apr 25, 1989Baxter Healthcare CorporationFluid communication device
US5443445 *Oct 8, 1993Aug 22, 1995Clinical Product Development LimitedSurgical device
US6238369 *Jun 15, 1999May 29, 2001Vasco, Inc.Method and systems for establishing vascular access
US7008535Aug 4, 2000Mar 7, 2006Wayne State UniversityApparatus for oxygenating wastewater
US7294278Nov 4, 2005Nov 13, 2007Wayne State UniversityMethod for oxygenating wastewater
US8420380Apr 8, 2008Apr 16, 2013Transmedics, Inc.Systems and methods for ex vivo lung care
US8608727Mar 1, 2004Dec 17, 2013Smiths Medical Asd, Inc.Delivery system and method
US8608728Sep 14, 2012Dec 17, 2013Smiths Medical Asd, Inc.Delivery system and method
US8822203Sep 28, 2010Sep 2, 2014Transmedics, Inc.Systems and methods for ex vivo organ care
US20090197324 *Apr 8, 2008Aug 6, 2009Robert FishmanSystems and methods for ex vivo lung care
EP0159773A1 *Feb 14, 1985Oct 30, 1985Sherwood Medical CompanyVena caval catheter and tip therefor
EP0425963A1 *Oct 22, 1990May 8, 1991DIDECO S.p.A.Device for conveying blood flow during liver surgery
WO2009058775A2 *Oct 28, 2008May 7, 2009Saudi Arabian Oil CoHeart pump apparatus and method for beating heart surgery
Classifications
U.S. Classification604/93.1, 285/125.1, 137/602, 422/45, 128/DIG.300, 604/284
International ClassificationA61M39/10, A61M1/36
Cooperative ClassificationA61M1/3653, A61M1/3655, A61M2039/1088, Y10S128/03
European ClassificationA61M1/36C7A, A61M1/36C7
Legal Events
DateCodeEventDescription
Jul 13, 1981ASAssignment
Owner name: MINNESOTA MINING AND MANUFACTURING COMPANY, ST. PA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SARNS, INC.,;REEL/FRAME:003883/0150
Effective date: 19810601
Owner name: MINNESOTA MINING AND MANUFACTURING COMPANY, A COR
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SARNS, INC.,;REEL/FRAME:003883/0150