US3570498A - Trocar and cannula for veterinary use - Google Patents

Trocar and cannula for veterinary use Download PDF

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Publication number
US3570498A
US3570498A US3570498DA US3570498A US 3570498 A US3570498 A US 3570498A US 3570498D A US3570498D A US 3570498DA US 3570498 A US3570498 A US 3570498A
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cannula
trocar
instrument
end portion
curved end
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Expired - Lifetime
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Charles Weighton
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Charles Weighton
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3415Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters

Abstract

A veterinary instrument having a trocar with a curved end and a cannula with its end curved to lie within the trocar during insertion, the cannula being rotatable with respect to the trocar to open out the curved ends after insertion and thereby lock the instrument in position. The parts are held in the closed and open conditions by a pin and slot connection and a biassing spring. A disc can be adjusted to bear against the animal''s skin and thus secure the instrument more firmly.

Description

I United States Patent [1113,570,498 72] inventor Charles Weighton [56] References Cited 64, Nettleham Road, Lincoln, England UNITED STATES PATENTS [21] P 1,798,124 3/1931 l-lunn 128/20 [22] 2 779 335 1/1957 n 128/347 45 Patented Mar. 16 1971 2,790,442 4/1957 Donaldson 128/348 [32] Priorlty Sept. 9, 1966 FOREIGN PATENTS [33] Great Britain 31 4044 69,722 8/1949 Denmark 128/347 Continuation of application Primary Examiner-Dalton L. Truluck 6 g 1967' now abandoned' Attorney-Roberts, Cushman and Grover ABSTRACT: A veterinary instrument having a trocar with a [54] if- W? FOR VETERINARY USE 22999 sa and 9 92999 49 itasai msd F999 ith u 5 .9 .9!" 9 995-19992999299 995195 1959995, e tab t [52] 0.8. CI. 128/347, respect to the trocar to open out the curved ends after inser- 128/20 tion and thereby lock the instrument in position. The parts are [51] Int. Cl. A61b 17/34 held in the closed and open conditions by a pin and slot con- [50] Field of Search 128/347- nection and a biassing spring. A disc can be adjusted to bear -351, 341343, 356, 303, 328, 20, 214.4, 215, against the animals skin and thus secure the instrument more 221 1 firmly.

, 1 TROCAR'AND CANNULA FOR VETERINARY USE This application is a continuation of Ser. No. 662,617 filed Aug. 23, 1967, now abandoned.

The invention relates to a trocar and cannula for veterinary use.

A cannula is a tube which may be inserted into the rumen of an ox to release trapped air -or other fluid. The insertion is made through the abdominal wall of the ox with the aid of a trocar, a sharp, pointed instrument. The cannula may be a straight tube in which the trocar is placed, during insertion, so as to project from the end of the cannula by say, half an inch. After insertion the trocar is removed to release the trapped air or other fluid. When it is desired to leave the cannula in position for some time then it may be attached to the animal's skin by means of adhesive applied to a flange projecting from the cannula. In such an arrangement the cannula may be loosened by movement of the animals body so that it may come partially out of the body.

According to the present invention there is provided a veterinary instrument comprising a cannula having a straight portion and a curved end portion, and a trocar having a tubular portion within which the straight portion of the cannula is rotatably received and an end portion which fits over one side of the curved end portion of the cannula and has a pointed tip,

the cannula being rotatable to a position in which its curved and trocar against relative rotation in either of two positions, in one of which the end portion of the trocar fits over the cannula and in the other of which the end portions are at an angle to one another. The cannula and trocar may be held in the locked positions by a spring against which they can be axially displaced for rotation of one relative to the other.

The instrument may also include a disc displaceable along the trocar to assist the anchorage of the instrument. After insertion of the trocar and rotation of the cannula to anchor the instrument within the rumen the disc is advanced to press against the skin of the animal and hold the instrument in place.

An embodiment of the invention will be described with reference to the accompanying drawings, in which:

FIG. 1 is a view of an instrument constructed according to the invention in the position occupied during insertion, the closed position.

FIG. 2 is a view of the instrument shown in FIG. 1 in the position occupied after insertion, the open position.

The instrument includes a cannula which, as shown in F IG. 1 is an open tube 1 having a straight portion and a curved end portion. When inserted through the side of an ox, into its rumen, collected fluid may enter the cannula by way of a hole 2 and leave by way of the outer end 3. A trocar is formed by a tubular element 4 which fits over the straight portion of the cannula and has an end portion 5 which fits over the inside of the curved end of the cannula and a pointed tip 6.

A knob 7 is fixed to the outer end of the cannula. The knob is pressed outwardly with respect to the trocar by a spring 8 and the outward motion is limited by a pin 9 projecting from the cannula and guided in a slot 10 in the trocar.

The instrument can be locked with the pin in two positions at the opposite ends of the slot and preferably at to each other.

One'locked position, the closed position is shown in F l6. 1. With the end of the cannula resting against the trocar, the instrument is inserted in the animal's side with a short stab. The knob 7 is then pressed to release the cannula which is then rotated to the other locked position, the open position, shown in FIG. 2.. This provides an anchorage preventing the withdrawal of the instrument until the lock is released. A movable disc 11 is mounted on the trocar and, after insertion of the instrument, is pressed on to the side of the animal and held by the fastening of a thumbscrew 12. This disc supplements the anchorage by firmly holding the instrument in position, with the end portions of the trocar resting against the internal wall of the rumen.

In the embodiment descrlbed, the trocar rests on the inner side of the curve of the cannula. In an alternative embodiment the trocar may rest on the outer side of the curve. In the latter case the spring would act in the opposite direction so as to retain the end of the cannula against the trocar in the 'closed' locked position.

I claim: 1. A veterinary instrument comprising: a cannula having a tubular straight portion and a tubular curved end portion;

a trocar having a tubular portion within which the tubular .straight portion of said cannula is rotatably received and a curved end portion having a concave inner surface adapted to fit over one side of the curved end portion of said cannula, said end portion having a pointed tip;

means for rotating said cannula between a first position in which its curved end portion is fitted within the curved end portion of said trocar and a second position in which its curved end portion is outside of and at an angle to the curved end portion of said trocar whereby said instrument may be anchored in position after insertion; and

an opening in the sidewall of said cannula substantially in alignment with the straight portion of said cannula.

2. An instrument as claimed in claim 1 including means for locking said cannula and trocar against relative rotation in either of said two positions.

3. An instrument as claimed in claim 2 comprising spring means for holding said cannula and trocar in the locked positions.

4. An instrument as claimed in claim 3 including a pin and slot connection between said cannula and said trocar, said slot having angularly spaced locking portions.

5. An instrument as claimed in claim 1 including a disc displaceable along said trocar to assist the anchorage of the instrument.

Claims (5)

1. A veterinary instrument comprising: a cannula having a tubular straight portion and a tubular curved end portion; a trocar having a tubular portion within which the tubular straight portion of said cannula is rotatably received and a curved end portion having a concave inner surface adapted to fit over one side of the curved end portion of said cannula, said end portion having a pointed tip; means for rotating said cannula between a first position in which its curved end portion is fitted within the curved end portion of said trocar and a second position in which its curved end portion is outside of and at an angle to the curved end portion of said trocar whereby said instrument may be anchored in position after insertion; and an opening in the sidewall of said cannula substantially in alignment with the straight portion of said cannula.
2. An instrument as claimed in claim 1 including means for locking said cannula and trocar against relative rotation in either of said two positions.
3. An instrument as claimed in claim 2 comprising spring means for holding said cannula and trocar in the locked positions.
4. An instrument as claimed in claim 3 including a pin and slot connection between said cannula and said trocar, said slot having angularly spaced locking portions.
5. An instrument as claimed in claim 1 including a disc displaceable along said trocar to assist the anchorage of the instrument.
US3570498A 1970-03-09 1970-03-09 Trocar and cannula for veterinary use Expired - Lifetime US3570498A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906956A (en) * 1974-07-03 1975-09-23 Max I Gilbert Cricothyrostomy instrument
US4003381A (en) * 1974-07-03 1977-01-18 Gilbert Max I Cricothyrostomy instrument
US4083370A (en) * 1976-11-03 1978-04-11 Taylor John D Bloat relief tube and holder
US4172458A (en) * 1977-11-07 1979-10-30 Pereyra Armand J Surgical ligature carrier
EP0430594A1 (en) * 1989-11-24 1991-06-05 Medical Device Technologies, Inc. Stabilized aspiration biopsy needle assembly
US5309894A (en) * 1991-08-03 1994-05-10 Richard Wolf Gmbh Endoscope for introduction into a hollow organ of a living thing
US5336206A (en) * 1989-08-15 1994-08-09 United States Surgical Corporation Trocar penetration depth indicator and guide tube positioning device
US5354279A (en) * 1992-10-21 1994-10-11 Bavaria Medizin Technologie Gmbh Plural needle injection catheter
US5370625A (en) * 1989-08-15 1994-12-06 United States Surgical Corporation Trocar guide tube positioning device
US5512037A (en) * 1994-05-12 1996-04-30 United States Surgical Corporation Percutaneous surgical retractor
US5755661A (en) * 1993-06-17 1998-05-26 Schwartzman; Alexander Planar abdominal wall retractor for laparoscopic surgery
US6007487A (en) * 1996-03-22 1999-12-28 Sdgi Holdings, Inc. Tissue retractor for use through a cannula
US6206826B1 (en) 1997-12-18 2001-03-27 Sdgi Holdings, Inc. Devices and methods for percutaneous surgery
US6217509B1 (en) 1996-03-22 2001-04-17 Sdgi Holdings, Inc. Devices and methods for percutaneous surgery
US6443910B1 (en) 2000-04-18 2002-09-03 Allegiance Corporation Bone marrow biopsy needle
US20030050574A1 (en) * 2000-04-18 2003-03-13 John Krueger Bone biopsy instrument having improved sample retention
US6533734B1 (en) * 1999-06-11 2003-03-18 The Board Of Trustees Of The University Of Illinois Time-integrated sampler of bodily fluid
US20030073998A1 (en) * 2000-08-01 2003-04-17 Endius Incorporated Method of securing vertebrae
US6730043B2 (en) 2000-04-18 2004-05-04 Allegiance Corporation Bone marrow biopsy needle
US20040149451A1 (en) * 1998-08-24 2004-08-05 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US20040176763A1 (en) * 1996-03-22 2004-09-09 Foley Kevin T. Methods for percutaneous surgery
US20050171478A1 (en) * 1998-01-13 2005-08-04 Selmon Matthew R. Catheter system for crossing total occlusions in vasculature
US20060241350A1 (en) * 2005-04-22 2006-10-26 Sdgi Holdings, Inc. Instruments and methods for selective tissue retraction through a retractor sleeve
US20080255563A1 (en) * 2006-11-03 2008-10-16 Innovative Spine Instrumentation and method for providing surgical access to a spine
US7985247B2 (en) 2000-08-01 2011-07-26 Zimmer Spine, Inc. Methods and apparatuses for treating the spine through an access device
US20110196205A1 (en) * 2010-02-05 2011-08-11 Tyco Healthcare Group Lp Surgical portal locking system
US8540746B2 (en) 1998-08-20 2013-09-24 Zimmer Spine, Inc. Cannula for receiving surgical instruments
US8840621B2 (en) 2006-11-03 2014-09-23 Innovative Spine, Inc. Spinal access systems and methods
USD774192S1 (en) * 2014-12-19 2016-12-13 Karl Storz Gmbh & Co. Kg Trocar

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798124A (en) * 1929-08-15 1931-03-24 Josiah Brinkerhoff Urethral sound and axis-traction prostatic retractor
US2779335A (en) * 1955-05-13 1957-01-29 Will N Hausser Self-retaining cattle trocar
US2790442A (en) * 1955-09-06 1957-04-30 Donaldson John Shearman Cannular surgical instrument

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798124A (en) * 1929-08-15 1931-03-24 Josiah Brinkerhoff Urethral sound and axis-traction prostatic retractor
US2779335A (en) * 1955-05-13 1957-01-29 Will N Hausser Self-retaining cattle trocar
US2790442A (en) * 1955-09-06 1957-04-30 Donaldson John Shearman Cannular surgical instrument

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906956A (en) * 1974-07-03 1975-09-23 Max I Gilbert Cricothyrostomy instrument
US4003381A (en) * 1974-07-03 1977-01-18 Gilbert Max I Cricothyrostomy instrument
US4083370A (en) * 1976-11-03 1978-04-11 Taylor John D Bloat relief tube and holder
US4172458A (en) * 1977-11-07 1979-10-30 Pereyra Armand J Surgical ligature carrier
US5336206A (en) * 1989-08-15 1994-08-09 United States Surgical Corporation Trocar penetration depth indicator and guide tube positioning device
US5370625A (en) * 1989-08-15 1994-12-06 United States Surgical Corporation Trocar guide tube positioning device
EP0430594A1 (en) * 1989-11-24 1991-06-05 Medical Device Technologies, Inc. Stabilized aspiration biopsy needle assembly
US5309894A (en) * 1991-08-03 1994-05-10 Richard Wolf Gmbh Endoscope for introduction into a hollow organ of a living thing
US5354279A (en) * 1992-10-21 1994-10-11 Bavaria Medizin Technologie Gmbh Plural needle injection catheter
US5755661A (en) * 1993-06-17 1998-05-26 Schwartzman; Alexander Planar abdominal wall retractor for laparoscopic surgery
US5512037A (en) * 1994-05-12 1996-04-30 United States Surgical Corporation Percutaneous surgical retractor
US20030139648A1 (en) * 1996-03-22 2003-07-24 Foley Kevin Thomas Devices and methods for percutaneous surgery
US7993378B2 (en) 1996-03-22 2011-08-09 Warsaw Orthopedic, IN. Methods for percutaneous spinal surgery
US6206822B1 (en) 1996-03-22 2001-03-27 Sdgi Holdings, Inc. Devices and methods for percutaneous surgery
US6217509B1 (en) 1996-03-22 2001-04-17 Sdgi Holdings, Inc. Devices and methods for percutaneous surgery
US6425859B1 (en) 1996-03-22 2002-07-30 Sdgi Holdings, Inc. Cannula and a retractor for percutaneous surgery
US6007487A (en) * 1996-03-22 1999-12-28 Sdgi Holdings, Inc. Tissue retractor for use through a cannula
US6520907B1 (en) 1996-03-22 2003-02-18 Sdgi Holdings, Inc. Methods for accessing the spinal column
US20040176763A1 (en) * 1996-03-22 2004-09-09 Foley Kevin T. Methods for percutaneous surgery
US20070156020A1 (en) * 1996-03-22 2007-07-05 Foley Kevin T Methods for percutaneous spinal surgery
US6206826B1 (en) 1997-12-18 2001-03-27 Sdgi Holdings, Inc. Devices and methods for percutaneous surgery
US20050171478A1 (en) * 1998-01-13 2005-08-04 Selmon Matthew R. Catheter system for crossing total occlusions in vasculature
US8540746B2 (en) 1998-08-20 2013-09-24 Zimmer Spine, Inc. Cannula for receiving surgical instruments
US7021374B2 (en) 1998-08-24 2006-04-04 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US20040149451A1 (en) * 1998-08-24 2004-08-05 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US6533734B1 (en) * 1999-06-11 2003-03-18 The Board Of Trustees Of The University Of Illinois Time-integrated sampler of bodily fluid
US20030050574A1 (en) * 2000-04-18 2003-03-13 John Krueger Bone biopsy instrument having improved sample retention
US7201722B2 (en) 2000-04-18 2007-04-10 Allegiance Corporation Bone biopsy instrument having improved sample retention
US6443910B1 (en) 2000-04-18 2002-09-03 Allegiance Corporation Bone marrow biopsy needle
US6730043B2 (en) 2000-04-18 2004-05-04 Allegiance Corporation Bone marrow biopsy needle
US9101353B2 (en) 2000-08-01 2015-08-11 Zimmer Spine, Inc. Method of securing vertebrae
US7056321B2 (en) 2000-08-01 2006-06-06 Endius, Incorporated Method of securing vertebrae
US20050021030A1 (en) * 2000-08-01 2005-01-27 Endius Incorporated Method of securing vertebrae
US20050113833A1 (en) * 2000-08-01 2005-05-26 Davison Thomas W. Method of securing vertebrae
US8864785B2 (en) 2000-08-01 2014-10-21 Zimmer Spine, Inc. Method for securing vertebrae
US8777997B2 (en) 2000-08-01 2014-07-15 Zimmer Spine, Inc. Method for securing vertebrae
US9622735B2 (en) 2000-08-01 2017-04-18 Zimmer Spine, Inc. Method for securing vertebrae
US7699877B2 (en) 2000-08-01 2010-04-20 Zimmer Spine, Inc. Method of securing vertebrae
US7722530B2 (en) 2000-08-01 2010-05-25 Zimmer Spine, Inc. Method of securing vertebrae
US7850695B2 (en) 2000-08-01 2010-12-14 Zimmer Spine, Inc. Method of securing vertebrae
US7985247B2 (en) 2000-08-01 2011-07-26 Zimmer Spine, Inc. Methods and apparatuses for treating the spine through an access device
US20040082960A1 (en) * 2000-08-01 2004-04-29 Davison Thomas W. Method of securing vertebrae
US8277486B2 (en) 2000-08-01 2012-10-02 Zimmer Spine, Inc. System for performing a procedure at a spinal location
US20030073998A1 (en) * 2000-08-01 2003-04-17 Endius Incorporated Method of securing vertebrae
US7427264B2 (en) 2005-04-22 2008-09-23 Warsaw Orthopedic, Inc. Instruments and methods for selective tissue retraction through a retractor sleeve
US20060241350A1 (en) * 2005-04-22 2006-10-26 Sdgi Holdings, Inc. Instruments and methods for selective tissue retraction through a retractor sleeve
US8057481B2 (en) 2006-11-03 2011-11-15 Innovative Spine, Llc System and method for providing surgical access to a spine
US8597299B2 (en) 2006-11-03 2013-12-03 Innovative Spine, Llc Instrumentation and method for providing surgical access to a spine
US20080306481A1 (en) * 2006-11-03 2008-12-11 Innovative Spine System and method for providing surgical access to a spine
US20080255563A1 (en) * 2006-11-03 2008-10-16 Innovative Spine Instrumentation and method for providing surgical access to a spine
US8840621B2 (en) 2006-11-03 2014-09-23 Innovative Spine, Inc. Spinal access systems and methods
US8025664B2 (en) 2006-11-03 2011-09-27 Innovative Spine, Llc System and method for providing surgical access to a spine
US8632550B2 (en) 2006-11-03 2014-01-21 Innovative Spine LLC. System and method for providing surgical access to a spine
US20110196205A1 (en) * 2010-02-05 2011-08-11 Tyco Healthcare Group Lp Surgical portal locking system
USD774192S1 (en) * 2014-12-19 2016-12-13 Karl Storz Gmbh & Co. Kg Trocar

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