# US 5,706,889 A · Wound heat exchanger oxygenator

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- Number: US 5,706,889 A
- Document ID: US5706889A
- Status: Granted
- Kind: A
- Application number: 08/703,857
- Filed: 1996-08-27
- Granted: 1998-01-13
- Earliest claimed: 1994-03-28
- Assignees: Minntech Corporation
- Inventors: Ulf-Eiel F. Bach; Paul D. Brinda; Louis C. Cosentino
- Web page: https://patentgrep.com/patent/US5706889A

## CPC

- B01D 63/026: {Wafer type modules or flat-surface type modules}
- A61M 1/1629: {with integral heat exchanger}
- A61M 1/1698: {Blood oxygenators with or without heat-exchangers (intracorporal A61M1/1678; manufacturing of membranes therefor B01D67/00; semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi-permeable membranes characterised by their material B01D71/00)}
- A61M 1/3623: {Means for actively controlling temperature of blood}
- B01D 63/0232: {using hollow fibers mats as precursor, e.g. wound or pleated mats}
- B01D 63/031: {Two or more types of hollow fibres within one bundle or within one potting or tube-sheet}
- B01D 63/043: {with separate tube sheets}
- F28F 21/062: {the heat-exchange apparatus employing tubular conduits}
- B01D 2313/105: Supply manifolds
- B01D 2313/221: Heat exchangers
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A low prime, high heat exchange efficiency oxygenator is provided which includes an oxygenation portion and a heat exchanger portion. Disposed within the heat exchanger portion is a hollow tube heat exchanger wound bundle which includes a plurality of hollow tubes knitted into a mat, the mat wound under tension into a bundle which includes from 16 to 24 layers of the mat. The oxygenator provided permits prime volumes of 180 to 240 mLs.

## Claims

### Claim 1

A hollow tube heat exchanger bundle used in open heart surgery for regulating the temperature of a patient's blood, said heat exchanger comprising a hollow heat tube mat including a plurality of substantially parallel hollow heat exchange tubes, each having a lumen, said heat exchange tubes weft knitted together by warp thread means in a spaced apart relationship, said warp thread means extending generally transversely to said heat exchange tubes and defining a spacing therebetween, said hollow heat exchange tube mat forming layers of stacked, substantially parallel plies, wherein the patient's blood uniformly flows around the exterior surface of each of said hollow heat exchange tubes and through said layers of stacked, substantially parallel plies as an exchange media passes through each of said lumens of said heat exchange tubes to heat and cool the blood during open heart surgery.

### Claim 2 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein said hollow heat exchange tube mat comprises from about 5.7 to 9.5 hollow heat exchange tubes per centimeter.

### Claim 3 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein interval spacing between said hollow heat exchange tubes is from about 0.175 cm to about 0.105 cm.

### Claim 4 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein said hollow tube heat exchanger bundle comprises from about 18 to about 22 layers of said substantially parallel plies.

### Claim 5 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein said warp thread means comprise a multifilament warp thread.

### Claim 6 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein said warp thread means comprise a hollow fiber tape.

### Claim 7 (depends on 1)

The hollow tube heat exchanger bundle of claim 1 wherein said plurality of substantially parallel hollow heat exchange tubes form a pattern of interdigitation within said hollow tube heat exchanger bundle.

### Claim 8

A hollow fiber membrane wound bundle used in open heart surgery for oxygenating a patient's blood, said hollow fiber membrane wound bundle comprising a hollow fiber mat including a plurality of substantially parallel hollow fiber membranes, each of said membranes having a lumen, said hollow fiber membranes weft knitted together by warp thread means in a spaced apart relationship, said warp thread means extending generally transversely to said hollow fiber membranes and defining a spacing therebetween, said hollow fiber mat forming layers of stacked, substantially parallel plies, wherein the patient's blood uniformly flows around the exterior surface of each of said hollow fiber membranes and through said layers of stacked, substantially parallel plies as an oxygenation media passes through each of said lumens of said hollow fiber membranes to oxygenate the blood during open heart surgery.

### Claim 9 (depends on 8)

The hollow fiber membrane wound bundle of claim 8 wherein said stacked layers of hollow fiber mat comprise from about 80 to about 120 substantially parallel plies.

### Claim 10 (depends on 8)

The hollow fiber membrane wound bundle of claim 8 wherein said hollow fiber mat comprises from about 15 to about 21 hollow fiber membranes per centimeter.

### Claim 11 (depends on 8)

The hollow fiber membrane wound bundle of claim 8 wherein said warp thread means comprise a multifilament warp thread.

### Claim 12 (depends on 8)

The hollow fiber membrane wound bundle of claim 8 wherein said warp thread means comprise a hollow fiber tape.

### Claim 13 (depends on 8)

The hollow fiber membrane wound bundle of claim 8 wherein said plurality of substantially parallel hollow fiber membranes form a pattern of interdigitation within said hollow fiber membrane wound bundle.