Surgery – Instruments – Surgical mesh – connector – clip – clamp or band
Patent
1996-08-09
1998-07-14
Buiz, Michael
Surgery
Instruments
Surgical mesh, connector, clip, clamp or band
606142, 606143, 606157, A61B 1708
Patent
active
057797200
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is related to surgical clips, and more particularly to surgical clip delivery systems.
BACKGROUND OF THE INVENTION
After every surgical operation, the healing of the wound is of major importance. Attempts have therefore been made to create optimal conditions for the most risk-free, pain-free and fastest healing. It is known that wounds whose edges are held together by clips or thread heal faster and cosmetically better than wounds that are left alone to heal (Williams and Harrison 1977). When surgical clips are used, the infection rate is lower, granulomas do not occur and the average length of the patient's hospital stay is shorter than when thread is used (Beresford et al, 1984). Clips are preferred for skin burns, because they are much faster to apply than a suture. A skin transplant can be attached more quickly, and critical anesthesia time can therefore be reduced (Kahn et al. 1984, Hallock et al. 1984).
Due to the reduced traumatization of the tissue compared to a suture, clamping produces better results in healing wounds and less scar formation. According to Neckemann (1965/1968), sutures leave scars at the puncture points and at the places where the thread is tied or presses on the tissue for some time. Surgeons therefore try to keep the number of puncture points and their size as small as possible to prevent the known "rope ladder" syndrome as much as possible.
Not only are surgical clips simple and fast to attach and remove, but the risk of germs growing on the surgical clips is low. In contrast, using sewing materials in the wound increases the risk of virulence from staphylococci some 10,000 times. The abscess rate is roughly three times lower with clip technology. According to Stephens (1990), wounds closed with clips exhibit better mechanical properties on the seventh day post-op than those closed with surgical thread. This means that the modulus of elasticity is greater, the tensile strength higher and the capacity for wound absorption without rupture is better. Lowdon et al. (1992) also found that post-operative complications in the form of anastomotic weaknesses, wound infection and bleeding are around 25% rarer when clips are used.
Conventional clips for attachment to parts of the body penetrate both sides of the skin on the wound to be held together in several places. For one thing, this penetration is painful to the patient and, for another, it is unfavorable for medical reasons. Besides the cosmetic effect due to the puncture, it also increases the risk of infection, since foreign material can get into the wound. And in many clip systems, a special instrument is required to remove the clips.
Most of the disadvantages associated with the use of thread have also occurred with the newer systems with staples. In spite of this, closing a wound with staple systems has become very widespread. In contrast to making a suture, the staple method requires less routine and is extremely fast due to the staplers in which the staples are stored. On the other hand, a special instrument is required to remove the staples.
Various surgical clips with relatively simple designs are known from the patent literature. Thus, U.S. Pat. No. 3,601,127 shows a surgical clip that consists of two semicircular clamping jaws that are connected to one another by a spring-mounted central web. The pressure edges of the jaws are toothed and perforate the edges of the wound.
On the other hand, EP-A-224,500 shows a surgical clip that consists of two movable jaws each with a grip, and pressure edges that are wavy, so there is no perforation of the edges of the wound.
From FR-A-419,096, one-piece spring-mounted, curved surgical clips with two pressure edges facing one another are known, where two jaws connected to one another by a web form the pressure edges. The simplicity of these surgical clips is attractive, but they require a special forceps to be used. Each clip must also be inserted individually into the forceps before it can be used.
WO-88/01487 shows surgical clips, whi
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patent: 5026379 (1991-06-01), Yoon
Dubach Werner Fritz
Walder-Utz Alice
Buiz Michael
Createchnic AG
Pham Tina T. D.
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