Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/32—Surgical cutting instruments
  • A61B17/3205—Excision instruments
  • A61B17/32053—Punch like cutting instruments, e.g. using a cylindrical or oval knife
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/00008—Vein tendon strippers

Definitions

• the present invention relates to a tendon stripper for removing tendons from the body of patients, comprising at least one stripper head, a guide tube and a handle, according to the preamble of patent claim 1.
• Tendon strippers in particular those according to Schöttle, are known, by means of which only a small skin incision in the area for removing tendons from the human - or animal - body, for example the tendon of the Plantaris longus muscle that is not required for functional purposes, after an archilles tendon tear in order to sew the tear of the archilles tendon tear is necessary.
• a second skin incision for the purpose of severing the tendon to be removed at the point of its transition into the muscle can be omitted, since the tendon can be severed there with the aid of the tendon stripper inserted along the tendon sliding bearing, or the knife contained in the tendon stripper head.
• the known tendon stripper mentioned above has the disadvantages, among other things, that it does not contain any means which enable the tendon to be exposed in its slide bearing and a severing of the tendinaculi as well as a peeling of the tendon from the muscles and adhesions or the like.
• the use of the known tendon stripper is not without problems, because when the stripper head is closed around the tendons to be removed, there is an unwanted severing or injury to the tendon, especially when the tendon stripper is withdrawn, in which the knife in this working position is in direct mechanical contact with the tendon .
• the present invention has for its object to eliminate the disadvantages of the known tendon stripper and to create a tendon stripper that has more possibilities offers as that and avoids an unwanted injury to the tendon to be removed from the body. Furthermore, the tendon stripper according to the invention is to be provided with mechanical means which, during the advancement of the stripper head along the tendon, enables it to be cut free from the muscles and from adhesions or the like.
• this object is achieved by a tendon stripper as defined in claim 1.
• FIG. 2 shows a cross section through this tendon stripper along the line A-A in Fig. 1.
• FIG. 6 is a front view of the stripper head with an inserted knife
• FIG. 1 shows a partial longitudinal section through an advantageous embodiment variant of a tendon stripper according to the invention with a double-edged and rotatable knife.
• a handle 1 which can be designed like a pistol grip to ensure controllable handling of the device and carries an actuating lever 2, similar to a trigger cock, with finger rest 2a and guide pin 2b, and also accommodates a guide tube 3 together with drive mechanism 4.
• the guide tube 3, within which a knife actuation axis 5 runs rotatably, carries on its free end a stripper head 6, which in turn encloses the rotatably mounted knife 7.
• the vision stripper according to the invention does not have a rotatable, but a fixed knife 7 and the actuating lever 2 together with the mechanism connected to it and the knife actuating axis 5 are missing.
• the actuating lever 2 is operatively connected to a drive mechanism 4 and for this purpose advantageously carries a drive pin 8 which engages in a groove 9 in an advantageously ball-bearing rotating cylinder 10, such that when the actuating lever 2 is completely retracted , or when moving the drive pin 8 along the entire length of the groove 9, the rotary cylinder 10 and the knife actuation axis 5 which can be connected to it advantageously accomplishes approximately a 220 "rotation about its longitudinal axis VV.
• the knife 7, which is firmly connected to the knife actuation axis 5, is accordingly also around can be rotated about 220 ° about the longitudinal axis VV with respect to the guide tube 3.
• FIG. 2 shows this using a cross section along the line AA in FIG. 1.
• this can have an adjusting mechanism which, in the embodiment variant shown here, consists of an adjusting ring 13 which is placed on the handle 1 so as to be rotatable about the longitudinal axis VV and which interacts with the drive pin 8 by the latter, and thus the actuating lever 2 can be restricted and offset in its axis-parallel movement by means of a guide groove 14, the shape of which can best be seen from the development of the adjusting ring 13 in FIG. 3.
• the limitation and displacement of the longitudinal movement of the actuating lever 2 results in a limitation and displacement of the rotary movement of the knife actuation axis 5 and thus of the knife 7 itself.
• This possibility of restricting and displacing the rotation of the knife 7 is, as described further below, essential and makes it possible to set a plurality of working positions of the knife 7 with a longitudinal movement of the actuating lever 2 which is constant in itself and can only be adjusted differently in terms of its length and relative position.
• four working positions can be set with the adjusting ring 13, namely in a first position, at the top in FIG. 3, keeping the stripper head 6 open for the purpose of inserting the tendon to be removed, in a second position locking the stripper head 6 by means of the Knife 7, in order to prevent the threaded tendon from sliding out, in position 3 cutting the forehead with knife 7, to cut the tendon free from the tendon sliding channel and the muscle, and in the offset position 4, at the bottom in FIG. 3, cutting through the tendon, to release them from the muscle.
• the stripper head 6 is advantageously designed in such a way that, as a widened end of the guide tube 3, it is partially milled on one side in such a way that it has an essentially oval opening 15 (FIG. 1) on this side. A tendon can then be threaded centrally into the stripper head 6 from the front and pulled through the oval lateral opening 15.
• the threading of the tendon can be replaced by an insertion if the stripper head 6 is provided with a slot 16 which creates a passage between the stripper head end and the oval opening 15.
• a knife 7 according to FIG. 5 is advantageously arranged within the stripper head 6 designed in this way, which is also essentially shaped as a cylindrical tube and has a cutout 18 which approximately corresponds to the oval opening 15 of the stripper head 6, but is larger than this.
• the knife 7 advantageously has a channel 19 which, when the knife 7 is in the first position of the adjusting ring 13, is congruent with the slot 16 of the stripper head 16 and is inserted a tendon.
• the channel 19 may advantageously have no sharp edges and has rounded portions 19a at its front end, whereas one edge, in FIG. 5 the edge 18a, of the cutout 18 should be sharpened with a knife such that it is described as follows , the tendon can be severed in the fourth position of the adjusting ring 13.
• the knife 7 In the second position of the adjusting ring 13, the knife 7 is rotated relative to the guide tube 3 and thus the stripper head 6 so far about the longitudinal axis VV that the slot 16 is covered. The tendon is thus inserted through the stripper head 6 and can no longer escape from it. The tendon stripper according to the invention can now be pushed forward along the tendon and the tendon sliding channel.
• the adjusting ring 13 can be brought into its third position, in which the slot 16 is covered and the oval opening 16 remains open, but the knife 7 can be rotated back and forth by actuating the actuating lever 2 by a predetermined angle of, for example, 40 ° about the longitudinal axis VV.
• the frontal area of the knife 7, which is ground as a substantially all-round cutting edge 20 (FIGS. 1 and 6) is actuated in such a way that the tendon running centrally can itself be cut out of the muscle attachment without being severed.
• the inner side 21 (FIG. 1) of the knife 7 adjoining the all-round cutting edge 20 is advantageously rounded in order to prevent the tendon within the knife 7 from being injured. This also results in better guidance of the tendon in the knife 7.
• the tendon If the tendon has been exposed to a sufficient length and / or has been cut free from the muscle attachment, it can be in the fourth position of the adjusting ring 13, that is to say when the actuating lever 2 is retracted to the maximum, in such a way that the knife actuation axis 5 can achieve its maximum rotation with respect to the longitudinal axis VV relative to the guide tube 3, through which the razor-sharp edge 18a of the cutout 18 is cut so that it can be pulled out of the surgical wound.
• the tendon stripper according to the invention according to FIGS. 1 to 6 the tendon remains connected to the body in the area of the surgical wound.
• the tendon stripper according to the invention which has no slot 16 in the stripper head 6 and no channel 19 in the knife 7, the tendon, which has been removed from the muscle attachment by means of the frontal knife without severing the tendon, can be removed from the surgical wound from the body.
• the actuating lever 2 is spring-loaded, in such a way that it is always pressed into its starting position by a spring, not shown in FIG. 1, in which it is as far as possible protrudes from the handle 1. It can then be moved back and forth by simply bending and stretching the index finger, which leads to an oscillating rotational movement of the knife 7 in the guide tube 3, which is smaller or larger depending on the set position of the adjusting ring 13 and displaced with respect to its center line.
• a driver coupling 12 which brings the rotary cylinder 10 and the knife actuation axis 5 into operative connection, is advantageously designed in such a way that the assembly of the tendon stripper according to the invention, or respectively the placement of the guide tube 3 with the knife actuation axis 5 therein, only in a single relative rotational position of the knife actuation axis 5 compared to the rotary cylinder 10 is possible.
• driver clutches are known in their construction.
• the tendon stripper according to the invention can be used with a single handle 1 and guide tubes 3 and stripper heads 6 of different lengths and thicknesses for different tendon withdrawals.
• the tendon stripper according to the invention can be pushed during its advancement can be moved back and forth almost arbitrarily in the body along the tendon and the tendon sliding channel and rotated around the longitudinal axis VV without the risk of the tendon passing through the stripper head 6 being injured. Removing a tendon from the body is therefore much easier with the tendon stripper according to the invention than with the known device of this type mentioned at the beginning.
• the different and permanently adjustable working positions of the tendon stripper according to the invention additionally simplify the surgeon's work.
• the handle 1 of the tendon stripper according to the invention can be designed differently from a pistol grip, as described below with reference to FIGS. 7 and 8.
• the stripper head 6 and the knife 7 rotatably mounted therein can also be designed differently, but it must be noted that the tendon to be removed from a body remains centrally insertable and laterally executable at the front and any unwanted contact between the ground edges of the knife and the tendon is avoided become.
• adjusting ring 13 another adjusting mechanism can be provided which, if necessary, does not limit the rotary movements of the knife 7 in certain working positions by restricting the longitudinal movement of the actuating lever 2, but rather acts on a rotating part. Furthermore, it is entirely possible to provide a separate end cutting knife which is mechanically separated from the chord cutting knife and can be actuated via a separate axis, for example in the form of a tube arranged between the guide tube 3 and the knife actuation axis 5. This allows, for example, electrical actuation of the face cutting knife. Further changes to the construction of a tendon stripper according to the invention described above are quite possible and are within the scope of the inventive concept.
• FIG. 7 shows a second advantageous embodiment variant of a tendon stripper according to the invention in partial longitudinal section. It differs from that according to FIGS. 1 to 6 essentially in that its handle 25 is not pistol grip-shaped but screwdriver-shaped and the adjusting mechanism is actuated by rotary instead of linear movements.
• the recess 29 advantageously merges into a blind hole 30 into which the positioning pin 28 can enter, in such a way that without pushing the longitudinal slide 27 against the spring force of the lever 26 can no longer be rotated. It is so that a fixed working position of the stripper head 6 with respect to the knife 7 is fixed, in which the stripper head 6 is laterally closed, as described above. This working position is shown with reference to FIG. 8 a, which shows the stripper head 6 and the knife 7 from the front. The channel 19 is offset from the slot 16 and a chord drawn into the stripper head 6 cannot therefore slide out of the latter.
• the tendon stripper according to the invention certainly does can also be used to tear out other vessels than tendons from the body of a human or animal. Varicose veins in particular can be easily removed.

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• Health & Medical Sciences (AREA)
• Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Medical Informatics (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Molecular Biology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Rheumatology (AREA)
• Knives (AREA)
• Surgical Instruments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4195909

Family Applications (1)

Country Status (5)

Cited By (1)

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• 1988
  • 1988-03-05 CH CH81888A patent/CH677440A5/de not_active IP Right Cessation
• 1989
  • 1989-03-06 EP EP19890902736 patent/EP0362316A1/de not_active Withdrawn
  • 1989-03-06 AU AU31865/89A patent/AU3186589A/en not_active Abandoned
  • 1989-03-06 JP JP50252989A patent/JPH02503999A/ja active Pending
  • 1989-03-06 WO PCT/CH1989/000039 patent/WO1989007913A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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