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Publication numberUS3181533 A
Publication typeGrant
Publication dateMay 4, 1965
Filing dateJan 15, 1962
Priority dateJan 15, 1962
Publication numberUS 3181533 A, US 3181533A, US-A-3181533, US3181533 A, US3181533A
InventorsWilliam C Heath
Original AssigneeWilliam C Heath
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surgical snare
US 3181533 A
Images(1)
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Description  (OCR text may contain errors)

May 4, 1965 w. c. HEATH SURGICAL SNARE Filed Jan. 15, 1962 INVENTOR. WILLIAM C. HEATH a zzdrus iarb Ai'forneys United States Patent 3,181,533 SURGIQAL SNARE William C. Heath, 1121 N. Waverly Place, Milwaukee, Wis. Filed Jan. 15, 1962, Ser. No. 166,198 Claims. (Cl. 128-320) This invention relates to a surgical snare used by surgeons for cutting cartilage and various parts of the anatomy in the performance of operations.

In the performance of operations time is an important factor, and where a snare is to be employed there must be certainty of its functioning. Various ways have been employed in making up snares from surgical wire and in many instances these have been very crude.

The present invention provides a ratchet type surgical snare with improved features facilitating its assembly and actuation and protecting against errors in assembly and in actuation.

The loop of the snare is always made of a given maximum size and by actuation of the ratchet device it can be gradually reduced in size to zero thereby serving to cut or to take hold of any object of the anatomy during an operation. The reduction in size of the loop is accomplished always by pulling both sides of the loop into a nozzle, so that there is no tendency to turn or twist the object that is gripped or being out by the loop.

The surgical wire forming the loop has its ends crimped in situ and secured in a plunger which draws the wire through the nozzle in reducing the loop.

The nozzle may have a plug in its mouth to guide the two sides of the loop as they enter the nozzle and prevent any kinking of the wire in the nozzle or plunger upon shock movements as when a cartilage is cut through.

The plunger has ratchet teeth along one side only and is adapted to be turned to disengage-the teeth from the ratchet actuating pawls so that the plunger can be rapidly returned to starting position for a new operation. A lock is provided to prevent accidental removal of the plunger from the actuating mechanism, which then might delay assembly for a pending operation.

The invention will be better understood by reference to the accompanying drawing which shows an embodiment thereof with the several features stated above.

In the drawing:

FIGURE 1 is a side elevation of the snare with the actuating mechanism sectioned axially of the plunger and nozzle;

FIGURE 2 is an end view of the device;

FIGURE 3 is a detail side elevation of the outer end of the plunger;

FIGURE 4 is a schematic illustration taken as a section on line 44 of FIG. 1;

FIG. 5 is a view similar to FIG. 4 with the plunger turned 90 from its position in FIG. 4 for release of the ratchet teeth from the pawls and providing a rapid return of the plunger to starting position;

FIG. 6 is a detail view similar in sectioning to FIG- URE 1 showing the plunger pulled to its outermost position and the lock engaged;

FIG. 7 is a detail perspective view showing the end of the nozzle with plug prior to insertion; and

FIG. 8 is an enlarged detail section taken on line 8--8 of FIGURE 1.

The surgical snare illustrated has a tubular body 1, carrying a removable nozzle 2 threaded thereto at one end, and a ratchet actuating device 3 at the other end.

A tubular plunger 4 is disposed axially Within the tubular body 1 and extends outwardly through the actuating device 3 for axial movement relative to body 1. The plunger 4 is cylindrical and fits within a cylindrical bore in body 1 to slide freely therein and to be turnable therein.

Ratchet teeth 5 are cut into the surface of the plunger along one side only and have their perpendicular sides facing axially toward the nozzle 2.

The actuating device 3 comprises two relatively mov able heads or blocks 6 and 7, each carrying a spring pressed pawl 8 which has teeth 9 complemental to teeth 5 and normally in engagement therewith. Block 6 is secured to the end of body member 1 in fixed relation thereto while the block 7 is movably carried by the body member 1 by means of the pivotal arms 10 hereinafter described. The blocks 6 and 7 have aligned bores therethrough serving as extensions of the bore of body 1 to receive the plunger 4.

A pair of laterally extending arms 10 are pivotally secured together at 11 intermediate the ends thereof, and have one end of each arm pivoted as at 12 to a corresponding block, and the other ends 13 of the arms serving as handles or a hand grip actuator. The handles 13 are similar to the handles of a pair of pliers and can be gripped in one hand of the operator and pivoted inwardly toward each other against a spring 14 which biases the arms 10 to a normal position where blocks 6 and 7 are closely adjacent. In operation, when handles 13 are squeezed toward each other against spring 14 block 7 will be moved axially away from block 6 and the ratchet pawl S in block 7 will pull the plunger 4 outwardly to the right from body 1. During this movement of plunger 4 the ratchet pawl 8 in block 6 moves outwardly against its spring 15 to ride over the ratchet teeth 5 on plunger 4.

When the handles 13 are released, spring 14 will separate them and cause the return of block 7 toward block 6 during which time the pawl 8 in block 7 will move outwardly against its spring 16 and ride over the ratchet teeth 5 on plunger 4.

Alternate squeezing and release of the handles 13 effects a step by step movement of plunger 4 outwardly in a direction to reduce the loop 17 of the snare, and at all times when one pawl 8 is riding over ratchet teeth 5 the other pawl engages the ratchet teeth 5 to secure the plunger 4 against inward movement.

The loop 17 is formed of surgical wire and is made up new just prior to use in each instance from a single wire of predetermined length. Informing the loop the ends 18 of the wire are threaded through the nozzle 2 and plunger 4 until they both engage the clamp head 19 which is secured on the outer end of plunger 4 and which provides an abutment or stop means for locating the ends 18 of the Wire during assembly and thereby determining the size of the loop 17. In this position and with plunger 4 moved all the way into body 1, the loop 17 will be of maximum size.

The ends 1% are secured tightly within clamp head 19 by individually crimping the same between the corrugated inner surface 29 of a recess 21 in the head and a complementary corrugated surface of a clamp member 22 inserted in the recess 21 and secured in clamping position by a screw 23. For best clamping action one of the wire ends 18 extends on one side of screw 23 and the other wire end extends on the opposite side of screw 23 so that the latter enters clamp head 19 between the wire ends. The plunger 4 and the head 19 fixed thereto and clamping the ends 18 of the wire, together with the actuating mechanism for the plunger constitute pull means for pulling the wire of the loop 17 into and through the nozzle 2 of body 1, thereby reducing the size of the loop.

A cap 24 slides over clamp head 19 and protects clamp 22 from accidental loosening. Cap 24 has a knurled outer cylindrical surface 25 to facilitate turning and is secured on the clamp head 19 by a screw 26. An arrow 27, or other indicia is marked on the outer end of cap 24' to indicate to the operator the rotational position of plunger 4 so that he knows when the the ratchet teeth 9 and are and are not engaged.

After a given operation in which the plunger 4 is ratcheted outwardly it is desired to move it back to starting position. For this purpose, a turn of the clamp head 19 and with it the plunger 4 by about 90 to release the ratchet teeth as shown in FIG. 5 will permit manual pushing of the plunger inwardly to starting position, after which it may be turned back to engage the ratchet teeth 9 and 5.

In order to prevent accidental removal of the plunger by pulling it out of the bore in body 1 and in blocks 6 and 7, a spring detent 28 is disposed in block 6 to bear against the plunger 4 on the side opposite to pawl 8. A circumferential groove 29 is provided encircling the inner end of plunger 4 with an, outwardly facing perpendicular wall 30 to engage spring detent 28 and stop further outward movement of the plunger, as shown in FIG. 6. The opposite wall 31 of groove 29 is slanting to serve as a cam for moving the detent spring 28 outwardly when plunger 4 is pushed inwardly.

Should it become desirable to remove the plunger 4 from body 1, the spring lock 28 may be removed from the body 1 and then the plunger may be pulled out all the way.

Whena cartilage or other member is cut through there may be a considerableshock on the snare and the wire may tend to kink in the nozzle 2 or plunger 4. In order to prevent this a plug 32 is inserted in the end of the nozzle against a shoulder 33 in the bore of the nozzle, and provides two openings 34'for receiving the corresponding wires forming the opposite sides of loop 17. The openings 34 may be either drilled in plug 32 or they may be formed as separate slots in the outer surface of the plug.

Upon completion of an operation the loop 17 will be removed and replaced by a new loop. For this purpose it is only necessary to turn and push the plunger 4 inwardly, remove cap 24, loosen clamp 22 and pull on the loop 17 to'withdraw ends 18 from the device. A new surgical wire is then inserted as previously described to form a new loop 17 and is clamped by member 22, after which cap 24 is replaced.

The invention provides a surgical snare that is quick and powerful to operate, with no danger of the, loop ratchet actuating means carried by said body and including pawl means engageable with said teeth, and means to actuate said pawl means relative to said ratchet teeth to effect movement of said plunger in a direction to pull said wire, and said plunger being rotatable in said body to disengage said ratchet teeth from said pawl means and thereby release said plunger for rapid return in a direction opposite to said wire pull direction. 7

2. A surgical snare employing a replaceable loop of surgical wire having free ends, comprising a tubular nozzle for receiving the free ends of the surgical wire and having .a head fixed to the end thereof opposite the loop, a tubular plunger axially movable within said nozzle and extending outwardly through said fixed head, clamp means on the outer end of said plungerfor securing the free ends of the surgical wire thereto, a movable head slidable on said plunger and disposed adjacent said fixed head, a series of ratchet teeth on one side of said plunger, spring pressed pawl means carried by each of said heads and adapted to engage said ratchet teeth, and lever means pivotally secured to said heads and disposed for manual alternate relative reciprocation of said heads toward and away from each other to effect step movement of said plunger outwardly of said'nozzle to contract the wire loop.

3. The construction of claim 2 in which said lever means comprises a pair of plier-like lever arms pivotally connected intermediate their ends'to provide a handle end and an operating end, a pivotal connection between the operating end of each said lever arm and a corresponding head to effect relative reciprocation of said heads by successive actuation of said lever arms, and spring; means biasing said lever arms in a direction to effect separation of the handle ends thereof and relative movement of said heads toward each other.

loosening or breaking, and that can be assembled and 1. In a surgical snare employing a surgical wire, a

body having a-nozzle through which thefree ends of the surgical wire forming a loop are threaded, and pull means carried by said body securing said free ends to pull the loop into the nozzle in operation by pulling both ends.

simultaneously relative to thenozzle, said pull means comprising a cylindrical tubular plunger axially movable in said body and havingratchet teeth on-one side thereof,

4. The construction of claim 2 in which said clamp means comprises separable clamp elements adapted to crimp the portions of the wire in clamping the same, and abutment means for locating the ends of the'wire'therein to elfect initial formation of a given sized loop with a given length of wire.

5. The construction of claim 2 in which said plunger is rotatable in said nozzle to present a smooth surface toward said ratchet means for free return of said plunger inwardly of said nozzle, and means on said plunger indi-' cating the rotational position thereof.

References Cited by the Examiner UNITED STATES PATENTS RICHARD A. GAUDET, Primary Examiner. JORDAN FRANKLIN, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US668647 *Mar 16, 1900Feb 26, 1901Max JaenickeÉcraseur.
US798839 *May 21, 1904Sep 5, 1905Charles W StoweIlluminated snare.
US1606497 *Aug 12, 1925Nov 9, 1926Berger Alfred A RSurgical instrument
US1609238 *Feb 19, 1925Nov 30, 1926Beck Foster AVacuum tonsillectome
US1772352 *Feb 29, 1928Aug 5, 1930W I Huber IncSurgical instrument
US2054149 *Mar 25, 1935Sep 15, 1936Wappler Frederick CharlesSurgical snare
US2154929 *Jan 29, 1937Apr 18, 1939Willys Overland Motors IncMechanism control
FR724776A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4538611 *Jun 13, 1983Sep 3, 1985Kelman Charles DSurgical instrument and method of cutting a lens of an eye
US4574478 *May 24, 1983Mar 11, 1986Siemens Gammasonics, Inc.Method and device for demounting in a radiation detector a photomultiplier tube
US4590938 *May 4, 1984May 27, 1986Segura Joseph WFor use through the working channel of an endoscope for removing stones
US5141515 *Oct 11, 1990Aug 25, 1992Eberbach Mark AApparatus and methods for repairing hernias
US5163942 *Dec 9, 1991Nov 17, 1992Everest Medical CorporationSurgical instrument with grasping loop for laparoscopic procedures
US5366460 *Aug 24, 1992Nov 22, 1994Cook IncorporatedApparatus and method for laparoscope hernia repair
US5376094 *Aug 19, 1993Dec 27, 1994Boston Scientific CorporationImproved actuating handle with pulley system for providing mechanical advantage to a surgical working element
US5417684 *Aug 12, 1994May 23, 1995Wilson Greatbatch Ltd.Laparoscopic surgical grasper with a loop with gripping formations
US5471992 *Jan 30, 1995Dec 5, 1995Boston Scientific CorporationMulti-motion cutter multiple biopsy sampling device
US5573008 *Oct 29, 1993Nov 12, 1996Boston Scientific CorporationMultiple biopsy sampling coring device
US5601585 *Feb 8, 1994Feb 11, 1997Boston Scientific CorporationMulti-motion side-cutting biopsy sampling device
US5613973 *Mar 10, 1995Mar 25, 1997Wilson Greatbatch Ltd.Laraposcopic surgical grasper having an attachable strap
US5681324 *Jun 7, 1995Oct 28, 1997Ethicon, Inc.Surgical tissue retrieval instrument
US5779648 *Mar 12, 1997Jul 14, 1998Boston Scientific CorporationMulti-motion cutter multiple biopsy sampling device
US5782839 *Oct 20, 1995Jul 21, 1998Wilson Greatbatch Ltd.Laparoscopic surgical grasper having a detachable strap
US5788710 *Apr 30, 1996Aug 4, 1998Boston Scientific CorporationCalculus removal
US5823971 *Nov 12, 1996Oct 20, 1998Boston Scientific CorporationMultiple biopsy sampling coring device
US5860987 *Dec 10, 1996Jan 19, 1999United States Surgical CorporationSurgical retractor
US5871453 *Aug 29, 1996Feb 16, 1999Boston Scientific CorporationMoveable sample tube multiple biopsy sampling device
US5957932 *May 4, 1998Sep 28, 1999Boston Scientific CorporationCalculus removal
US5961534 *Feb 11, 1997Oct 5, 1999Boston Scientific CorporationMulti-motion side cutting biopsy sampling device
US6053877 *Nov 17, 1998Apr 25, 2000Boston Scientific CorporationMovable sample tube multiple biopsy sampling device
US6142957 *Jan 27, 1997Nov 7, 2000Boston Scientific CorporationMultiple biopsy sampling device
US6156043 *Apr 1, 1999Dec 5, 2000Krahn; Henry P.Soft tissue morsellator
US6168604Sep 21, 1999Jan 2, 2001Metamorphic Surgical Devices, LlcGuide wire device for removing solid objects from body canals
US6264663Jan 26, 1998Jul 24, 2001Metamorphic Surgical Devices, LlcDevice for removing solid objects from body canals, cavities and organs including an invertable basket
US6319262Jun 24, 1999Nov 20, 2001Boston Scientific CorporationCalculus removal
US6440138Apr 6, 1998Aug 27, 2002Kyphon Inc.Structures and methods for creating cavities in interior body regions
US6863672Jul 30, 2002Mar 8, 2005Kyphon Inc.Structures and methods for creating cavities in interior body regions
US6923813Jul 16, 2004Aug 2, 2005Kyphon Inc.Devices for creating voids in interior body regions and related methods
US6936052Mar 7, 2002Aug 30, 2005Boston Scientific Scimed, Inc.System for implanting an implant and method thereof
US6991597Mar 7, 2002Jan 31, 2006Boston Scientific Scimed, Inc.System for implanting an implant and method thereof
US7025772Mar 7, 2002Apr 11, 2006Scimed Life Systems, Inc.System for implanting an implant and method thereof
US7080981 *Sep 17, 2002Jul 25, 2006Yoshitsugu TerauchiDevice for removing a broken instrument, assisting instruments, and the method to retrieve a broken instrument from the root canal
US7235043Mar 7, 2002Jun 26, 2007Boston Scientific Scimed Inc.System for implanting an implant and method thereof
US7264622Oct 24, 2003Sep 4, 2007Warsaw Orthopedic, Inc.System for radial bone displacement
US7361138Jul 31, 2003Apr 22, 2008Scimed Life Systems, Inc.Bioabsorbable casing for surgical sling assembly
US7402133Aug 14, 2003Jul 22, 2008Boston Scientific Scimed, Inc.Spacer for sling delivery system
US7824326Feb 29, 2008Nov 2, 2010Boston Scientific Scimed, Inc.Bioabsorbable casing for surgical sling assembly
US7879038Oct 30, 2007Feb 1, 2011Kyphon SarlApparatus, kits, and methods for creating cavities in cancellous bone using an elongated loop structure or bristles
US7909827Apr 24, 2007Mar 22, 2011Kyphon SarlSystems and methods for creating cavities in interior body regions
US8033983Aug 14, 2003Oct 11, 2011Boston Scientific Scimed, Inc.Medical implant
US8162816Mar 7, 2002Apr 24, 2012Boston Scientific Scimed, Inc.System for implanting an implant and method thereof
US8597303 *Nov 1, 2006Dec 3, 2013Cook Medical Technologies LlcArticulating basket with simultaneous basket extension or basket retraction
US8617048Mar 7, 2002Dec 31, 2013Boston Scientific Scimed, Inc.System for implanting an implant and method thereof
US8632453Jul 15, 2008Jan 21, 2014Boston Scientific Scimed, Inc.Spacer for sling delivery system
EP0027704A2 *Oct 9, 1980Apr 29, 1981Dale L. ChamnessSurgical snare apparatus
EP0446020A1 *Mar 5, 1991Sep 11, 1991C.R. Bard, Inc.Surgical gripping instrument
EP0519022A1 *Oct 11, 1991Dec 23, 1992Cook IncorporatedSurgical patch and insertion device
EP1073371A1 *Apr 6, 1999Feb 7, 2001Kyphon Inc.Structures and methods for creating cavities in interior body regions
WO1987005792A1 *Mar 27, 1987Oct 8, 1987Waltap LtdApparatus and method for performing a tracheostomy operation
WO1994020029A1 *Mar 11, 1994Sep 15, 1994Greatbatch W LtdLaparoscopic surgical grasper
Classifications
U.S. Classification606/113, 606/79
International ClassificationA61B17/24, A61B17/26, A61B17/32
Cooperative ClassificationA61B17/32056, A61B17/26
European ClassificationA61B17/26, A61B17/3205S