Surgery – Truss – Pad
Patent
1984-02-21
1986-11-25
Pinkham, Richard C.
Surgery
Truss
Pad
128335, A61B 1704, A61B 1708
Patent
active
046242570
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This application, which is based upon PCT/SE83/00253, June 17, 1983, and which claims priority from Swedish application No. 8203966-0 filed June 24, 1982, is related to U.S. application Ser. No. 516,462, filed July 22, 1983.
The present invention concerns a surgical instrument for joining two vessel ends or other tubular organs and establishing liquid connection between them, i.e. anastomosis, by the aid of annular clamping means, anastomosis rings, provided with axially directed pins, on which the vessel ends are threaded before the joining. The invention also concerns anastomosis rings to be used in anastomosis with this surgical instrument. The instrument and the anastomosis rings are shaped and adapted to be utilized mainly in microsurgery.
From the U.S. Pat. No. 3,258,012, Nakayama et al, it is previously known to join two blood vessel ends by means of a pair of needle discs having alternately spaced projecting needles and holes for these on an annular base element. For the joining of two blood vessel ends by means of these needle discs or anastomosis rings two forceps are used retaining the needle discs during threading of the blood vessel end into the needles and holding the needle disc in a suitable position so that it can be secured to the needle disc on the other vessel end by the needles being pressed through the holes on the opposite needle disc and bent when the guided forceps are pressed together.
One difficulty in using Nakayama's method is that two different separate forceps are needed to perform the anastomosis. The guides in these two forceps are to be fitted into each other before the two forceps are pressed together by means of a third instrument. Another difficulty may arise as the tips of the blades of the two anastomosis forceps i.a. carry one of the guides, why they extend considerably outside the needle disc which may create problems as the surgical area is limited.
Another difficulty in the known method is that the needles of the needle discs are intended to be bent around the opposite needle disc, why they are rather long. At small vessel dimensions they will be easily exposed to bending and wrong alignment in handling and threading of the blood vessel end, and a malfunction may be the result due to the fact that during the compression all needles are not brought through the correct hole in the opposite needle disc.
Said difficulties are overcome effectively by means of an instrument and anastomosis rings according to the invention. Thus, one object of the invention is to provide a surgical instrument retaining two anastomosis rings while threading the vessel ends and embodied so that the anastomosis rings are directed towards each other and that the instrument, moreover, comprises means for pressing the anastomosis rings together without any requirement of additional tools or instruments.
It is also an object of the invention to provide anastomosis rings being adapted to the surgical instrument according to the invention.
Another object of the invention is to achieve an anastomosis instrument and anastomosis rings being adapted for the joining of vessels having small dimensions and for narrow surgical areas.
These and other objects are met by means of an anastomosis instrument and anastomosis rings having the characterizing features defined in the claims .
The invention will be described more in detail in connection with the embodiments shown in the drawings where
FIG. 1 shows an enlarged portion of an instrument according to the invention at one moment of its use,
FIG. 2 shows the same part of the instrument as FIG. 1 at a later moment,
FIG. 3 shows an enlargement, partly in section, of the whole instrument of FIGS. 1 and 2 with a central portion cut off,
FIG. 4 shows the section IV--IV in FIG. 3. as further enlarged,
FIG. 5 shows enlarged parts of the front portion of the instrument,
FIG. 6 shows a great enlargement of an embodiment of a fastening means according to the invention,
FIG. 7 shows a great enlargement of another embodiment of
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Berggren Anders
Ostrup Leif T.
Rohman Hakan A. E.
Layno Benjamin
Pinkham Richard C.
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