Special receptacle or package – For a fastener – Surgical or wound type
Patent
1999-01-29
2000-12-12
Foster, Jim
Special receptacle or package
For a fastener
Surgical or wound type
206340, B65D 8500
Patent
active
061585831
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a hemostatic clip holder.
A hemostatic clip is a small clamp, that is generally made of metal, that is approximately U-shaped, and that is designed to be placed and closed on a blood vessel during a surgical operation, in order to close off said vessel.
Clips are supplied to users on a support, commonly referred to as a cartridge or a strip, carrying a certain number of clips placed side by side, for example a dozen clips.
During an operation, the surgeon takes clips one by one as they are needed, using special forceps which also serve, once the clip has been taken, to transfer it onto the blood vessel, and to compress it to pinch off and close the vessel.
Clip supports generally have a certain number of housings extending transversely relative to the longitudinal direction of the strip, with the clips being engaged therein in the upside-down position (upside-down U-shape).
Devices of that kind are described, for example, in the documents U.S. Pat. No. 3,326,216 and U.S. Pat. No. 4,696,396.
In those known devices, the clips are retained by friction with the limbs of the U-shapes being prestressed in the closure direction so as to clamp against the strip wall with a certain amount of friction.
This holding force is rather unpredictable, and it is not always easy to extract a clip with the forceps since there is always a tendency for the clip support to be lifted together with the forceps being used for extraction.
It is therefore often necessary to use both hands, which is not practical for the surgeon.
Also known, from document WO-91/04925, is a clip support of the above-mentioned kind in which clips are retained by means of resilient tongues having notches which co-operate with the lateral limbs of an upside-down clip.
Although that device theoretically eliminates the above-mentioned drawback, there nevertheless remains a problem of interference between the forceps and the holding tongues, since the tongues are pressed against the limbs of the clip, and the forceps also press against those portions of the clip.
This gives rise to faulty operation. In addition, the presence of the deformable lateral tongue on each side of the clip considerably increases the width of the strip.
In the device constituting the subject matter of document U.S. Pat. No. 4,961,499, each clip is placed astride a fixed element of complementary shape between a pair of solid transverse walls serving to retain the clip. For this purpose, each of the walls has projections facing the other that are suitable for blocking the central zone of the web of the clip. The walls are flexible to some extent due to the presence of slots formed in the thickness thereof, and they can splay apart from each other temporarily by a camming effect to allow a clip to pass while it is being put into place and while it is being taken out.
In spite of that, the stiffness of the walls is relatively high, and that device does not allow clips to be extracted while applying a force that is small and constant; on the contrary, the operator encounters a hard point, and it is practically impossible to use a tool having open-ended grooves for extraction purposes. With forceps of that type, the connection between the jaws of the forceps and the clip takes place solely by friction and cannot overcome an opposing force that is high and/or suddenly applied.
The same drawbacks are to be encountered with the devices described in documents U.S. Pat. No. 4,076,120 and EP-A-0 482 861 which, like the preceding device, block the central zone of the web of the clip by means of two elements facing each other symmetrically about the plane of the clip, and capable of deforming over a stroke that is very limited.
The device of document EP-A-0 583 151, which is derived from EP-A-0 482 861, relates to a clip having a special shape that is not symmetrical. It has a small resilient tongue in the form of a hook acting laterally against the clip. That device has a configuration which gives the tongue an elastic stroke which is likewise very limited; in ad
REFERENCES:
patent: 4076120 (1978-02-01), Carroll et al.
patent: 4146130 (1979-03-01), Samuels et al.
patent: 4294355 (1981-10-01), Jewusiak et al.
patent: 4961499 (1990-10-01), Kulp
patent: 5908430 (1999-06-01), Appleby
Foster Jim
Vitalitec International
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