Source: https://patents.google.com/patent/US6074375A/en
Timestamp: 2018-05-24 20:13:08
Document Index: 294755852

Matched Legal Cases: ['arts 5', 'art 53', 'art 55', 'art 54', 'arts 53', 'arts 52', 'art 1997']

US6074375A - Heart muscle irrigation device, applicator and method - Google Patents
Heart muscle irrigation device, applicator and method Download PDF
US6074375A
US6074375A US09378724 US37872499A US6074375A US 6074375 A US6074375 A US 6074375A US 09378724 US09378724 US 09378724 US 37872499 A US37872499 A US 37872499A US 6074375 A US6074375 A US 6074375A
US09378724
Stiles; Frank B.
This application is a continuation-in-part of U.S. application Ser. No. 08/965,382 filed Nov. 6, 1997 now abandoned which is derived prior to Ser. No. 60/031,254, filed Nov. 12, 1996 (now abandoned).
When used, the head 4 is eased into the heart muscle to form an aperture therein. Its placement into the muscle is carefully monitored by known imaging means. It is inserted until the head 4 has entered a heart chamber or ventricle which contains oxygenated blood. The plunger is then used to eject the irrigation device by deflecting the head parts 5, 6, etc. whilst at the same time slowly withdrawing the insertion device. By coordinating the movement inwardly of the plunger 7, and outwardly of the barrel 2, the irrigation device is left inserted into the aperture made in the heart muscle by the head 4.
In FIG. 3 there is shown an irrigation device mounted, ready for use, in a barrel 21. This barrel 21 can be either of those shown in FIGS. 1 or 2. The irrigation device 20 includes a cylindrical body portion 22, a first closed end 23, and a second open end 24. The body portion 22 is a sliding fit into the barrel 21. The closed end 23 of the body portion is located adjacent the end 24 of a plunger 25. It can also be seen that when loaded into the insertion device the two radial members 26 and 27 are each bent inwardly from the radial position (see FIG. 4) to be essentially coaxial with the body portion 22, but pointing in opposite directions. This serves to locate the irrigation device in the insertion device whilst it is being assembled, amongst other things. This irrigation device is also provided with a plurality of slots 28 to enable blood to reach the heart muscle tissues from the hollow interior of the body portion 22.
In FIG. 4 there is shown schematically a different irrigation device 29 lodged into a heart muscle 30. The body portion wall 31 is provided with a plurality of small holes 32 allowing blood access to the tissues of the muscle 30A: via the said holes, slots, an area mesh or a grid and hence on into and through the continuously expanding number of colateral blood delivery vessels. As shown a unitary construction is used; a plurality of suitable small holes is also obtainable in a three part construction, in which a portion of the body wall comprises a suitable mesh material. The irrigation device is held in place by the members 33, and 34, which have returned to their essentially radial positions; this happens at each end as the irrigation device is ejected from the barrel.
Referring first to FIG. 5, applicator 40 has a hollow shaft 41 which conveniently has a soft elastomer handle 42. One end of the hollow shaft is provided with a suitable attachment for a surgical vacuum device (not shown). At the other end the hollow tube a substantially planar tip face 43 extends from the handle. For ease of use, the tip should be at an angle of about 45° to the axis of the hollow shaft. This angle is not critical, and other angles both higher and lower could be used: the angle facilitates location the insertion device more or less perpendicular to the heart muscle. The angle can be obtained in any suitable way: the hollow shaft can include a bend as at 44, or, as shown at 45 in FIG. 7, the hollow shaft can be attached to the tip at a suitable angle. The tip is also of tubular construction, and communicates with the hollow shaft. The underside of the tip has a layer of soft elastomeric material 46 attached to it. The construction of the shaft and of the tip is discussed further below in the context of FIG. 10.
An alternative construction is shown in FIG. 10. This construction is still based on a vacuum tube 41, which carries a soft elastomer handle 42. Instead of a single tip 43 provided with a soft elastomer layer 46, two separate tips 43A and 43B are provided, each having a soft elastomer layer 46 (the layer for tip 43B is not visible). Each tip is connected to the hollow shaft 41 by a short hollow shaft including a first tubular part 53A, 53B, a flexible part 55A, 55B and a second short tubular part 54A, 54B. The first two tubular parts are both connected into an adapter 56, which is attached to the hollow shaft 41. Additionally, the hollow shaft 41 includes a flexible portion 52. Further, if desired the three joints between the hollow shaft 41 and the two short tubular parts 53A and 53B are constructed so that any or all of them can rotate relative to the adapter 56. Rotatable joints of this type are well known. In FIG. 10 the three flexible parts 52, 53A and 53B are shown as ribbed concertina-like elements: it is also contemplated that each of them can be made by using a plastics material which will provide a tube which is both stiff enough not to collapse under the applied vacuum, and which is flexible enough to be bent into and then retain a desired configuration. Surgically acceptable plastics materials of this type are well known. The same type of plastics material can also be used for the two tips 43A and 43B, and for the other constructions described above if desired.
1. A heart muscle irrigation device insertion applicator comprising a hollow tubular member having a first end constructed and arranged to be connected to a surgically acceptable source of vacuum; a substantially planar hollow tip portion having a substantially circular shape attached to the other end of the hollow tubular member and in communication therewith; the tip portion being at an angle to the hollow tubular member, and including a foraminous underside; and a soft elastomeric layer attached to the underside of the tip portion including holes in communication with the foramens in the tip underside.
2. An applicator according to claim 1 wherein the angle is about 45°.
3. An applicator according to claim 1 wherein the hollow tubular member includes a bend of about 45°.
4. An applicator according to claim 1 wherein the tip is attached to the hollow tubular member at an angle of about 45°.
5. An applicator according to claim 1 wherein the tip portion is circular.
6. An applicator according to claim 1 wherein the applicator is an arc of a circle of horse shoe shape.
7. An applicator according to claim 1 wherein the foraminous area comprises a plurality of holes.
8. An applicator according to claim 1 wherein the foraminous area comprises a plurality of slots.
9. An applicator according to claim 1 wherein the foraminous area comprises a grid or mesh.
US09378724 1996-11-12 1999-08-23 Heart muscle irrigation device, applicator and method Expired - Fee Related US6074375A (en)
US3125496 true 1996-11-12 1996-11-12
US96538297 true 1997-11-06 1997-11-06
US09378724 US6074375A (en) 1996-11-12 1999-08-23 Heart muscle irrigation device, applicator and method
US10319581 US6783517B2 (en) 1996-11-06 2002-12-16 Heart muscle irrigation device, applicator and method
US96538297 Continuation-In-Part 1997-11-06 1997-11-06
US6074375A true US6074375A (en) 2000-06-13
ID=26707003
US09378723 Expired - Fee Related US6558359B1 (en) 1996-11-12 1999-08-23 Heart muscle irrigation device, applicator and method
US09378724 Expired - Fee Related US6074375A (en) 1996-11-12 1999-08-23 Heart muscle irrigation device, applicator and method
US (2) US6558359B1 (en)
CA (1) CA2220734A1 (en)
WO2006041014A1 (en) * 2004-10-14 2006-04-20 Sumitomo Bakelite Co., Ltd. Treatment instrument for coronary artery bypass operation
CN100556372C (en) * 2004-10-14 2009-11-04 住友电木株式会社 Treatment instrument for coronary artery bypass operation
KR100872673B1 (en) * 2004-10-14 2008-12-10 스미토모 베이클라이트 가부시키가이샤 Coronary artery bypass grafting device
CA2220734A1 (en) 1998-05-12 application
US6558359B1 (en) 2003-05-06 grant