Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2525329 A
Publication typeGrant
Publication dateOct 10, 1950
Filing dateSep 16, 1948
Priority dateSep 16, 1948
Publication numberUS 2525329 A, US 2525329A, US-A-2525329, US2525329 A, US2525329A
InventorsAndrew Wyzenbeek
Original AssigneeAndrew Wyzenbeek
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Trocar apparatus
US 2525329 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Oct. 10, 1950 Filed Sept. 16, 1948 A. WYZENBEEK TROCAR APPARATUS 2 Sheetsheet 1 @ha V y/m( Oct. l0, 1950 A. WYZENBEEK TRoCAR APPARATUS 2 'Sheets-Sheet 2 Filed Sept. 16, 1948 /ffI 7 El .MEV

@Agg um.

Patented Oct. 10, 195.0

OFFICE YtragarAPIAMfl-IJS Andpeyv Wyzenbeek, Chicago, Ill.

Applicationv September 16, 1948, Serial No. 49,564

This invention relates to Ytrocar apparatus.

Under the present practice, the trocar instrument comprises a tube having a pointed end and with inlet apertures near the pointed end. A suction tube leads from the rear end of the instrument to a vacuum pump which may be of various types. The hollow tube described becomes easily clogged with tissues and the withdrawal of internal liquids becomes diiiiult. The instrument has to be repeatedly withdrawn and cleaned by means of a rod, etc. Thus, the operation is one involving considerable time and often with unsuccessful results inthe withdrawal of liquids.

An object of the present invention is to provide trocar apparatus effective in cleaning itself without requiring the withdrawal of the instru- `ment. Yet another object is to provide simple apparatus in which the injected tube may be repeatedly cleaned of tissue to permit the eiective withdrawal of liquids Without requiring the removal of the injected tube. Astill further object is to provide apparatus of unique structure in which a handle is rotatably or reciprocatingly mounted between the injected tube and the suction tube for electively moving the cutter for maintaining vports or slots open Within the injected tube. Yet another object is ,to provide such an apparatus in which the cuttenwhile effectively held in"position for movement within the outer or slotted tube, may be readily separated for cleaning upon the' withdrawal of the outer tube. Other specific objects and advantages will appear as the specication proceeds.

The invention is illustrated in a single embodiment, by the accompanying drawing, in which; Fig. 1 is a plan view of a trocar instrument embodying my invention; Fig. 2, a vertical sectional view; Eig. 3, a broken detail sectional view showingrthe forward vportion of Athe instrument; lFigjl, `a planview of the flat metal strip employed for iormingthe cutter; Fig. 5, a plan view of the cutter for-med@ from the dat strip shown in Eig; el; Fig. 6,`a` perspective .View of the end of the tube adapted to receive the rear portion of the cutter; Fig. 7, a longitudinal sectional view of a modified form ofthe invention; and

Fig. 8, a longitudinal sectional View ofanother modified form of the invention.

In the illustration given in Figs. 1 to 6 inclusive, I designates a handle member equipped at its rear with a Athreaded tubular member II. The member II may be threaded into a recess at the rear of handle Ill so that the passage I2 within the tube II is aligned with the longitudnal passage I3 within the handle I0. Rotat- VClaimS. (Cl. 12S-347) ably mounted upon the member I! .is a swivel member I4 adapted to receive a Aflexible :tube I5 leading to a source of suction. Thus, the handle I0 is free to rotate without turning the tube I5 by reason of the swivel member I4 interposed between tube I5 and the xed ttingl I.

The handle I il is also provided with-a'threaded tting I 6 at its forward end, as shown. more clearly in Fig. 2. The tting IEis provided with an outer spaced flange I1 providing between vit and the handle wall a recess adapted to receive the swivel ring I8, The swivel ringlhas an inwardly extending portion received .withinlthe recess and adapted to rotateupon the member I6. At its forward end, the ringrIB threadedly engages a nut I9. The hollow nut I9 is fixed 'to an outer tube 2@ by sweating or byanyfother suitable means. Thus, in the structure shown, the outer tube 2li, nut I9, and the swivel ring IB are joined together so that they rotate with respect to the member I6.

The outer tube 20 is internally threaded at its forward end to receive the threaded `neck 2| of a point member'22. The point 22Mmay beof any suitable form so as to .provide a penetrating edge or point, but I prefer to have a pointed portion which has concave lines, as indicatedv at 23. To the rear of the point 2l, the outer-tube'Z is provided with a plurality of inlet slots 324, as shown more clearly in Figs. 1 and 3.

An inner tube 25 is fixed to the iittingl I6 by sweating the tube therein or by other means, and the inner tube is provided with a tongue and groove end structure 26, as shown best in Fig. 6. Y

A cutter 2'! is provided also with a tongue and groove structure 28 complementary to the structure 26 of tube 25 so that the cutter 2T may be fitted into interlocking engagement with the forward end 26 of tube 25. The cutter 21 is provided with the forwardly extending cutter blades 28 provided with cutting edges and turned so as to traverse the interior of the outer tube-20-along the slots 24. It will be understoodthatany suitable cutter device lfor effectively cutting tissue extending through the slots 24 may be'employed.

Operation In the operation of the apparatus, the real' swivel connection I4 is connected with a suction tube I5 which leads to any source of suction. The outer pointed tube 2D may be introduced in the Ausual manner for the withdrawal of liquids and during the Withdrawal Qi liquids,

3 the handle l may be rotated periodically to cut away any fragments of tissue extending through the slots 24, thus maintaining the slots 24 open at all times for the withdrawal of fluids.

The apparatus may be readily disassembled, as already indicated, for cleaning. The threaded connections permit a complete disassembly if this should be desired. Ordinarily, the outer tube may be removed by separating nut I9 from the swivel ring IB and upon the withdrawal of the outer tube 20, the cutter 21 may be removed readily from the inner tube 25. Thus effective cleaning of the cutter portion of the instrument may be readily effected and, if desired, the cutter may be replaced by a new cutter structure. If desired, the cutter may be formed as a xed part of the inner tube. I prefer, however, to employ a separable cutter for the purpose of ready cleaning or replacement of the same.

In the illustration given in Fig. the outer 'tube 30 is fixed to a stationary handle member 3i and an inner tube 32 is mounted for reciprocation within the handle 3| and tube 30. The inner tube 32 is provided with a cutter 33 at its forward end so that when the cutter is reciprocated back and forth in line with the inlet open ings 34, any obstructing tissue is cut away. The handle 3| is preferably provided with a stuiing box nut 35 for maintaining packing 36 around the tube 32. Fixed to the outer end of tube 32 is a fitting 31 to which is secured the flexible tube 38 leading to a source of suction. The fitting 37 provides a handle which facilitates the reciprocating of inner .tube 32 in the cutting operation.

In the illustration given in Fig. 8, the outer tube 39 is fixed to a central member 48 having at its rear end an enlargement 4l adapted to be received within the flexible tube 42 leading to a source of suction; The member' 4D is provided centrally with a transfer slot 43 through which extends a pin 44. The pin is fixed at its ends to aslidable handle 45. Pin '44 extends through a 'boss carried by the cutter rod 45 and the rod at its forward end is fixed to a cutter member 4l.

vByl employing a rod, as described, a cutter 47 vture'shown in Fig. 8, the cutter edges 49 and 48 are caused to pass the inlet passages 58 and to f cut away any obstructing tissue.

The structure shown in Figs. 7 and 8 illustrate two of many different types of apparatus which may be used to embody my invention.

While in the foregoing specification, I have set forth certain structures in considerable detail for the purpose of illustrating an embodiment of the invention, it will be understood that such details of structure may be widely varied by those skilled in the art without departing from the spirit of my invention.

rI claim:

l. Trocar apparatus comprising a hollow handle equipped at its front and rear ends with swivel connections, a tube engaging the swivel connection at the rear of said handle andfadapted to lead to a source of suction, an outer tube connected to the swivel connection at the for- 4 ward end of the handle and having a pointed end, said outer tube having slots adjacent said pointed end, an inner tube fixed to said handle and communicating with the passage there-through, and a hollow cutter member carried by the forward end o-f said inner tube for rotation within said outer tube adjacent the slots thereof.

2. Trocar apparatus comprising a handle having a longitudinal passage there-through and equipped at either end with swivel connections, a exible tube connected to the swivel connection at one end and adapted to lead to a source of suction, an outer tube connected to the swivel connection at the other end of said handle and having a pointed end, said outer tube having also drain openings adjacent said pointed end, an inner tube fixed to said handle and communicating With the passage thereof, a rotary cutter mounted within said outer tube for rotation adjacent said openings, and interlocking connections detachably connecting saidcutter to said inner tube. Y

3. In fluid-removing apparatus, an outer tube, a point threadedly connected to the end of said tube and having a concave pointed portion, said outer tube being provided with slots adjacent said point, a cutter mounted within said tube and having blades adapted to traverse the inner surface of said tube for cutting away tissue projecting thereunto, an inner tube connected to said cutter and rotatably mounted within said outer tube, a handle secured to said inner tube and provided with a longitudinal passage communicating with said inner tube, a swivel member` carried by said handle, and a suction tube connected to said swvel'and adapted to lead to a source of suction.

4. Trocarr apparatus comprising an outer tube having a pointed end and drain openings adjacent said end, a cutter slidably mounted in said tube and having cutting edges at opposite ends thereof, a rod secured to said cutter and mounted for reciprocation within said tube, and a conduit communicating with said outer tube.

`5 Trocar apparatus comprising an outer tube having a pointed end and having drain openings adjacent said end, a handle member xed to said outer tube andA having a longitudinal passage therethrough, said handle member having a slot extending therethrough, a cutter mounted for reeiprocation in said tube, a rod xed to said cutter and extending rearwardly thereof in said tube and handle, a pin extending through a'rear portion of said rod and through the slot in said handle, and a handle sleeve enclosing said handle and iixed to the ends of said pin.


REFERENCES CITED 'Y The following references are of record in the file of this patent:

UNITED. S'lArI'llS PATENTS Smith Mar. 2, 1937

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US387480 *Aug 26, 1886Aug 7, 1888 Joseph j
US737293 *Nov 1, 1900Aug 25, 1903George H SummerfeldtVeterinary surgical instrument.
US1952617 *Aug 24, 1931Mar 27, 1934 Method and means foe surgical
US2072346 *Oct 4, 1934Mar 2, 1937Ward R SmithDrainage tube
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2642873 *Feb 12, 1949Jun 23, 1953Rice Edward RAspirating trocar
US3416532 *Jul 24, 1964Dec 17, 1968Richard Grossman AlanDrainage tube with means for scraping away debris therewithin
US3811442 *Mar 23, 1972May 21, 1974A MarothHypodermic syringe holder and applicator
US4535773 *Mar 26, 1982Aug 20, 1985Inbae YoonSafety puncturing instrument and method
US5030213 *Aug 21, 1989Jul 9, 1991Rumberger William ECatheter router and method of use
US5057082 *Nov 4, 1988Oct 15, 1991Plastic Injectors, Inc.Trocar assembly
US5254106 *Apr 17, 1992Oct 19, 1993Feaster Fred THydrodissection needle
US5431655 *Jun 9, 1993Jul 11, 1995Cook IncorporatedIntraosseous needle
US5458579 *Nov 25, 1992Oct 17, 1995Technalytics, Inc.Mechanical trocar insertion apparatus
US5484442 *May 11, 1992Jan 16, 1996Cook IncorporatedIntraosseous needle
US5538509 *Jan 31, 1994Jul 23, 1996Richard-Allan Medical Industries, Inc.Trocar assembly
US5601559 *Feb 4, 1994Feb 11, 1997Cook IncorporatedIntraosseous needle
US5855566 *Jun 1, 1995Jan 5, 1999Urohealth, Inc. (California)Trocar assembly
US5941852 *Jun 1, 1995Aug 24, 1999Imagyn Medical Technologies California, Inc.Trocar assembly
US6197041Sep 15, 1993Mar 6, 2001United States Surgical CorporationTrocar
US6783533Nov 21, 2001Aug 31, 2004Sythes Ag ChurAttachable/detachable reaming head for surgical reamer
US7682333 *Jan 15, 2002Mar 23, 2010Stryker CorporationPowered surgical handpiece with precision suction control
DE4038952A1 *Dec 6, 1990Jun 11, 1992Hartmut Dr GoebelAtraumatic syringe needle for accurate guidance - has inserted stylet with cone end protruding from teflon stem with external dia. redn. at tip
DE4134655A1 *Oct 19, 1991Apr 22, 1993Hartmut Dr GoebelAtraumatic cannula - has cylindrical shaft from which evolves pointed mandrel whose external dia. corresponds to inner dia. of shaft
EP0546767A2 *Dec 3, 1992Jun 16, 1993Unisurge, Inc.Hand-held surgical device and tools for use therewith
WO1990004364A1 *Oct 23, 1989May 3, 1990Cook IncIntraosseous needle assembly
U.S. Classification604/267, 604/273, 27/24.2
International ClassificationA61B17/34
Cooperative ClassificationA61B17/34
European ClassificationA61B17/34