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WO1995029640A1 - Instrument chirurgical a corps tubulaire - Google Patents

Instrument chirurgical a corps tubulaire Download PDF

Info

Publication number
WO1995029640A1
WO1995029640A1 PCT/EP1995/000998 EP9500998W WO9529640A1 WO 1995029640 A1 WO1995029640 A1 WO 1995029640A1 EP 9500998 W EP9500998 W EP 9500998W WO 9529640 A1 WO9529640 A1 WO 9529640A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
tube
tubular shaft
extension
electrically insulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1995/000998
Other languages
German (de)
English (en)
Inventor
Markus Nesper
Dieter Weisshaupt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aesculap AG
Original Assignee
Aesculap AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aesculap AG filed Critical Aesculap AG
Publication of WO1995029640A1 publication Critical patent/WO1995029640A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod

Definitions

  • the invention relates to a surgical tubular shaft instrument with a tube, at the end of which a holder for a tool is detachably held, and with an actuating element arranged in the tube and longitudinally movable therein for moving the tool, with electrical insulation of the tube and the bracket.
  • a surgical tubular shaft instrument of this type is known, for example, from German utility model 9318815.
  • the holder on the outside is covered with a special electrically insulating layer.
  • an insulating outer shell, which surrounds the tube of the tubular shaft instrument, adjoins the holder and fixes the tube in a fixing position, in which the tube is axially immovably connected to the holder of the tools.
  • this object is achieved according to the invention in that the holder as a whole consists of an electrically insulating material.
  • This electrically insulating material can be plastic, for example, but it is particularly advantageous if the holder consists of ceramic.
  • the radial Has recesses in which radially displaceable projections of the tube engage and thereby fix the holder axially, can be provided according to a further development that the radial projections extend only over part of the circumference of the extension and in between parallel to the longitudinal axis of the extension Running webs remain that connect the part of the bracket protruding from the tube with its extension.
  • a particularly advantageous embodiment is obtained if the extension tapers in the area of the recesses towards its end inserted into the tube and if the webs extend into the part with a smaller outside diameter as a continuation of the part of the extension with a larger outside diameter .
  • Figure 1 is a schematic side view of a
  • Tube shaft instrument with tools that can be moved in pliers
  • Figure 2 is a partial perspective view of the tubular shaft instrument of Figure 1 in the connection area between the holder of the tool and the tubular shaft and
  • FIG. 3 a longitudinal sectional view in the connection area of the tool holder and the tubular shaft along line 3-3 in FIG. 2.
  • the tubular shaft instrument 1 shown in the drawing comprises a tubular shaft 2, in the front end of which a holder 3 is inserted, on which two jaw-shaped tools 4, 5 are pivotally mounted about a common axis, thus forming a gripping instrument or pliers.
  • the two tools 4 and 5 are moved by a push and pull rod 6 arranged in the interior of the shaft 2, which emerges from the shaft 2 at the rear end and is articulated there to a handle branch 7, which in turn is connected rotatable on a second handle branch 8 is stored.
  • This second grip branch 8 is rigidly connected to the shaft 2, so that when the two grip branches 7 and 8 are pivoted against each other, the push and pull rods 6 are pushed back and forth inside the shaft.
  • the holder 3 shown in more detail in FIGS. 2 and 3 has a front circular cylindrical section 9 with an axially parallel compartment 10 which is open towards the front and into which the two tools 4 and 5 engage. In this area, the tools 4 and 5 are pivotably supported by a transverse shaft 11. Through a through opening 12 extending from the rear end into the compartment 10, the push and pull rod 6 extends into the compartment 10 and is connected there to gear means, not shown in the drawing, which pivot the tools 4 effect around the bearing shaft 11.
  • a central section 13 adjoins the front section 9 of the holder 3, which is set back on an annular step 14 with respect to the front section and thus has a smaller outside diameter than the front section.
  • this middle section 13 merges via a further step 17 into a rear section 15, the outside diameter of which is once again smaller than that of the middle section 13.
  • An annular groove is immediately connected to the ring step 17 16 in the outer circumference of the rear section 15, through which this rear section 15 is further weakened in the direct connection to the central section 13. This annular groove 16 forms a radial recess in this area.
  • the annular groove 16 does not extend over the entire outer circumference of the rear section 15, but is interrupted by webs 18 which, as a continuation of the middle section 13, extend axially parallel over the annular groove 16 and in turn in the form of a step 19 into the Pass over the lateral surface of the rear section 15.
  • These webs 18, which can be offset from one another by 90 °, for example, and each extend over an angular range of, for example, 20 °, thereby bridge the annular groove 16 and reinforce the holder in the transition region from the central section 13 into the rear section cut 15. The weakening effect of the annular groove 16 is thus at least partially eliminated.
  • the entire holder 3 is formed in one piece and consists of an electrically insulating material, preferably ceramic.
  • the rear section 15 of the holder 3 dips into the tubular shaft 2 and lies against the inner wall thereof.
  • the shaft 2 carries a plurality of resilient tongues 20 which are separated from one another by longitudinal cuts 21 and which carry radial projections 22 which protrude inwards.
  • the longitudinal cuts 21 widen step-wise towards the front end and form there open compartments 23 into which the webs 18 enter in the transition area between the middle section 13 and the rear section 15 of the holder 3.
  • the projections 22 dip into the annular groove 16, and in this position the tongues 20 fixed by a tubular sleeve 24 which is displaceably mounted on the tubular shaft 2 in the axial direction and which embraces the tubular shaft 2 and the holder 3 aligned with this in the central section 13 when they are in the front position ( Figure 3), in which the sleeve 24 abuts the ring step 14.
  • the sleeve 24 consists of electrically insulating material, so that in the transition region of the sleeve consisting of electrically insulating material on the one hand and the holder 3 consisting entirely of electrically insulating material on the other hand, no electrical connection to the outside is possible.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Otolaryngology (AREA)
  • Surgical Instruments (AREA)
  • Endoscopes (AREA)

Abstract

L'invention a pour objet un instrument chirurgical à corps tubulaire, comprenant un tube, à l'extrémité duquel un support porte-outil est monté amovible, un élément d'actionnement disposé dans le tube et mobile longitudinalement dans celui-ci, de manière à assurer le déplacement de l'outil, ainsi qu'une isolation électrique du tube et du support. En vue de faciliter la fabrication de l'isolation électrique dans la zone du support, l'instrument chirurgical est caractérisé en ce que le support est entièrement constitué par un matériau électriquement isolant.
PCT/EP1995/000998 1994-05-02 1995-03-17 Instrument chirurgical a corps tubulaire Ceased WO1995029640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944415359 DE4415359C2 (de) 1994-05-02 1994-05-02 Chirurgisches Rohrschaftinstrument
DEP4415359.7 1994-05-02

Publications (1)

Publication Number Publication Date
WO1995029640A1 true WO1995029640A1 (fr) 1995-11-09

Family

ID=6517030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/000998 Ceased WO1995029640A1 (fr) 1994-05-02 1995-03-17 Instrument chirurgical a corps tubulaire

Country Status (2)

Country Link
DE (1) DE4415359C2 (fr)
WO (1) WO1995029640A1 (fr)

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