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Publication numberUS3470872 A
Publication typeGrant
Publication date7 Oct 1969
Filing date25 Nov 1966
Priority date25 Nov 1966
Publication numberUS 3470872 A, US 3470872A, US-A-3470872, US3470872 A, US3470872A
InventorsGrieshaber Herman R
Original AssigneeGrieshaber Herman R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pivoted retractor with shielded spacer teeth
US 3470872 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)


HERMAN R. GR/ESHABER BY PEA/OLE TON, lVEUMA/V SE/BOLD 8 WILLIAMS A TTORNEYS United States Patent 3,470,872 PIVOTED RETRACTOR WITH SHIELDED SPACER TEETH Herman R. Grieshaber, Kenilworth, Ill. (7020 W. Cullom Ave., Norridge, Ill.) Filed Nov. 25, 1966, Ser. No. 596,938 Int. Cl. A61b 17/50 US. Cl. 128-17 4 Claims ABSTRACT- OF THE DISCLOSURE A surgical retractor employing pivotally connected arms having finger-engaging handle portions connected thereto utilizes a spacer strip mounted on one of the handle portions. The spacer strip has projections adapted to mesh with the teeth of a pivotal detent which is resiliently biased by means of an encased spring assembly. A shield disposed over the projections of the spacer strip prevents the retractor manipulator from coming into contact with the spacer projections.

This invention relates to a surgical retractor or like instrument, and more particularly pertains to an instrument containing a toothed spacer member extending between finger-engaging portions of the instrument in which a novel shield is provided to prevent contact of the user with the spacer teeth.

In tong-like instruments such as retractors wherein forces are exerted at the ends of the pivotally connected arms during use tending to collapse or close the same, means must be employed to maintain such arms in the desired open position. In a surgical retractor having opposed pivotal arms, tines or similar means are normally disposed at one terminal end of each arm for purposes of engaging and maintaining in spaced relationship tissue defining a surgical incision. Finger-engaging grip portions are disposed on the opposite ends of the arms of the retractor. One means commonly employed to maintain said arms spaced apart comprises an arcuate spacer plate extending from one pivotal arm to the other on which a pivotally mounted detent is mounted.

The teeth of the spacer strip directed in the direction of the instrument grip portions engage meshing teeth in the detent, which prevent closing of the retractor arms unless pivotally moved out of engagement with said spacer strip. However, because of the proximity of the teeth of the arcuate member to the retractor fingerengaging portion, tearing of gloves of the surgeon or his assistant oftentimes results. Such tearing not only confuses the operative procedures but also may on occasion provide a threat of infection.

In accordance with this invention the dangers inherent in the presence of such teeth are avoided by the placement of a novel shield over the teeth. Such shield prevents catching of adjacent materials while in no way interfering with the normal functioning of the retractor.

It is an object of this invention therefore to provide a surgical retractor or the like, in which teeth normally found in a spacer strip thereof provide no danger or problem whatsoever during normal instrument use.

It is another object of this invention to provide a surgical retractor or the like which may be simply modified so as to eliminate problems heretofore commonly encountered during use of such well known retractor construction.

In one embodiment of this invention a tong-like retractor is provided in which tines disposed at one distal end of each of two pivotal arm portions are adapted to engage tissue such as define an incision for maintaining the same in spaced relation. Finger-engaging openings or grip portions disposed at the opposite ends of such arms enable the tines and engaged tissue to be spread apart by a surgeon or assistant by pivotally moving the tines apart. An arcuate spacer strip having a toothed edge disposed adjacent the grips coacts with a pivotal toothed detent for locking the arms in their spaced relationship. In accordance with this invention a novel shield for the teeth of the spacer strip is disposed thereover to obviate engagement with the surgeons gloves or with other adjacent matter such as sponges, as will hereinafter be explained in greater detail.

For a more complete understanding of this invention reference will now be made to the drawing wherein:

FIG. 1 is a bottom plane view of one embodiment of a surgical retractor made in accordance with this invention;

FIG. 2 is a fragmentary elevational view partly broken away illustrating the manner in which the detent of a retractor of this invention is pivotally mounted to one of the instrument arms and the manner in which such detent is spring biased into engagement with a spacer strip fragmentarily illustrated;

FIG. 3 is an enlarged fragmentary perspective view of a toothed spacer strip employed in the retractor illustrated in FIG. 1; and

FIG. 4 is a fragmentary perspective view illustrated on a greatly enlarged scale of tines which may be employed on the terminal ends of each of the retractor arms for purposes of effecting a retracting function.

Referring now more particularly to FIG. 1, a retractor 10 is illustrated having opposed arm portions 12 and 14 which are pivotally connected by means of pin 16. Attaohed to a terminal end of each arm 12 and 14 are a plurality of tines 18 more clearly seen in FIG. 4. Each time 18 has an outwardly disposed distal end 20 adapted to facilitate the spreading apart of engaged tissue. Each retractor arm 12 and 14 has integrally formed therewith at the end portion oppositely disposed to the tines 18 a fingenengaging grip portion. Grip 22 is formed with arm 12, and grip 24 is formed integrally with arm 14. The

. portions of the arms 12 and 14 extending from the pivot pin 16 to the grip portions 22 and 24 comprise handle portions 26 and 28 disposed to one side of pin 16 while the tines 18 are disposed on the opposite side.

In the normal course of retractor operation the tines 18 are disposed downwardly into an incision, and the engaged tissue spread apart by moving the handle portions and finger-engaging grip portions of a retractor together. It is apparent from the arrows shown in FIG. 1 that as the handle portions move together, the tines 18 of the handles to which attached are spread apart.

In order to position the tines and arms in a desired spaced relationship which shall remain fixed, arcuate spacer strip 30 is affixed to handle portion 26 of the retractor 10 by keying, pinning or the like. The strip 30 extends beyond the opposed handle portion 28 of the retractor as illustrated in FIG. 1.

Pivotally mounted on pin 40 of handle portion 28 of the retractor is a detent 32 more clearly seen in FIG. 2. The spacer strip 30 has projecting teeth disposed in the general director of the underlying grip portions of the retractor, and more particularly, angled so as to point in the direction of the grip portion 22 of the device. 'These teeth 34 are adapted to mesh with mating teeth 36 which are angled in a direction opposite to that of teeth 34. Inasmuch as the detent 32 is pivotally mounted in offcenter condition, it is seen that as the handle portions and finger engaging grips are moved together, the teeth 34 of the spacer strip 30 will slidably move over the underlying teeth of the cam 32 which will be pivoted out of engagement with the teeth 34.

A spring loaded cylindrical pin 38 illustrated in FIGS. 1 and 2, and partially broken away in FIG. 2, urges the detent 32 and the teeth 36 thereof against the overlying spacer strip 30 and the teeth 34. When the handles 26 and 24 are pulled together, the teeth of detent 32 will be pushed from engagement with teeth 34 as the detent pivots about its pin 40 in opposition to spring 42 mounted in an opening in handle portion 28 of the retractor 10. However, should any force be exerted tending to push the opposed tines 18 of the arms and 14 together, the teeth 36 of the detent 32 will function as a catch preventing movement of the handle portions 26 and 28 in an outward direction or movement of the tine portions 18 in an inward direction.

In order to collapse or bring together the tine portions 18 of the illustrated retractor, the detent 32 must be manually pivoted out of engagement with the teeth of the spacer strip 30 by means of handle portion 33 of the detent which may be easily pushed inwardly in opposition to the spring 42. After the restraining teeth 36 of the detent 32 are disengaged fnom the teeth 34 of the spacer strip 30 the tine portions may obviously be readily brought together and disengaged from the tissue with which they were initially engaged.

In utilizing instruments such as that above described, difficulty had previously been encountered in the course of instrument use as the result of the sharp teeth 34 of the spacer strip engaging and tearing the thin rubber gloves of the surgeon or his assistant manipulating the same. In addition such sharp teeth could readily engage a sponge or other material which might be brought into contact therewith.

In accordance with this invention, an arcuate plate or shield 44 is mounted on the upper surface of the spacer strip 30 in such manner so as to project beyond the terminal ends of teeth 34 in the manner illustrated in FIG. 3. As a result of such plate it is virtually impossible for a surgeon to contact such teeth in the normal course of instrument use inasmuch as the surgeons glove will first engage the plate 44.

The plate 44 is securely adhered to the spacer strip 30 so as to insure a full surface-to-surface contact with no open spaces between the plate and strip which would function as a breeding or harboring place for germs or bacteria. Shield plates may be employed on opposed surfaces of the spacer strip as indicated in FIG. 2 wherein shield plate 44a is oppositely disposed to shield 44. Plate 44a is of course adhered to the strip 30 similarly to plate 44. It is apparent that the most common diificulty previously encountered was the tearing of the surgeons gloves when the surgeons forefinger was employed to engage the detent handle portion 33 thereby releasing the detent from engagement with the spacer strip. In the course of such release operation, the glove portion of the finger tripping the detent 32 oftentimes came into engagement with the sharp teeth 34 in the spacer strip and in many instances the glove was torn.

The specific configuration of the elements disposed on the ends of the arms 12 and 14 is of no importance to this invention. This invention is concerned solely with the protection to be afforded the user, and more specifically the protection against tearing action of the teeth 34. In addition, a subsidiary feature of this invention comprises the spring loaded pin 38 which also is free from all projections or cutting surfaces and by virtue of the snug, slidable relationship with the opening in the handle portion 28 of the retractor 10, minimizes the danger of foreign matter accumulation on pin 38. In addition pin 38 is free from all surface configurations or points which may engage a surgeons glove, sponge or the like.

It is seen therefore that a simple protective structural feature has been provided which is adapted for use with retractors and other similar surgical and dental instruments such as dilators with a minimum amount of modification of the basic instrument. The presence of the protective plate or plates, while affording maximum protection in no way detracts from the ability of the instrument to be sterilized in the course of being rendered germ free. Also, a novel spring loaded pin has been provided for purposes of urging the provided detent into engagement with the teeth of the spacer blade.

Without further elaboration, the foregoing will so fully explain the character of our invention that others may, by applying current knowledge, readily adapt the same for use under varying conditions of service, while retaining certain features which may properly be said to constitute the essential items of novelty involved, which items are intended to be defined and secured to us by the following claims.

I claim:

1. In a surgical retractor the combination comprising pivotally connected arms movable about a pivot point, said arms having connected thereto handle portions with finger-engaging openings adapted to be moved into adjacent and spaced relationships, said 'arms and handle portions being arranged relative to said pivot point whereby the distal ends of said arms are in abutting relation when said handle portions are in maximum spaced relation, said arm distal ends being adapted to move apart as said handle portions approach each other; spacer means mounted on one of said handle portions and extending toward the other of said handle pontions and having a plurality of projections extending from an edge portion of said spacer mean-s disposed adjacent said finger-engaging openings; shield means disposed over all of said projections preventing contact between said projections and the fingers of the manipulator of said retractor when said projections are approached in a plane normal to that in which said spacer means is disposed; a resiliently biased, toothed detent mounted on said other of said handle portions and adapted to pivot into engagement with the projections of said spacer means for preventing movement of said arms toward each other when the teeth thereof engage the projections of said spacer means.

2. The device of claim 1 in which said toothed detent is spring loaded into engagement with said spacer means, the spring being mounted in a reciprocally movably cylindrical container extending from said other of said handle portions and urging said detent into engagement with said spacer means.

3. The surgical retractor of claim 1 in combination with a discrete plate means disposed on at least one surface of said spacer means and extending beyond said projections.

4. In a surgical retr-actor. the combination comprising opposed pivotally connected arms pivotal about a pivot point into spaced and adjacent relationship; each of said arms being connected to a finger-engaging handle portion adapted to be manually engaged for moving said arms into desired relationship; spacer means extending between said handle portions attached to one of said handle portions and having projections disposed along an edge adjacent said finger-engaging handle portions; a pivotal detent mounted on the other of said handle portions and having teeth biased into engagement with the projections of said spacer means, the relative angularity of said spacer means projections and said detent teeth enabling relative slidable movement therebetween when said opposed arms are pivotally moved apart and providing for meshing engagement when said arms are piovtally moved toward each other; said detent engaging a spring-loaded projection snugly and reciprocally mounted in a receiving opening disposed in the other of said handle portions; said detent having a handle portion whereby the teeth 5 thereof may be readily pivoted out of engagement with 2,293,984 8/1942 the projections of said spacer means in opposition to said 2,481,007 9/ 1949 spring-loaded projection. 3,038,467 6/ 1962 References Cited 3176682 4/1965 UNITED STATES PATENTS Kirschbaum 128323 Dugdale 12817 XR Sovatkin 128-17 Wexler 128-17 5 RICHARD A. GAUDET, Primary Examiner KYLE L. HOWELL, Assistant Examiner US. Cl. X.R.

Champ 81393 Hooks 29223 Sovatkin 128325 Stephens 81-328 10 29239; 81-328; 128321

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1123243 *13 Nov 19135 Jan 1915John K ChampPliers.
US1616621 *14 Mar 19258 Feb 1927Hooks William NPiston-ring remover
US1852542 *26 Dec 19295 Apr 1932Sklar Mfg Co Inc JCutlery
US2250400 *27 Apr 193922 Jul 1941Stephens Paul MWrench
US2293984 *21 Apr 194125 Aug 1942Kirschbaum Harry MObstetrical forceps
US2481007 *1 Oct 19476 Sep 1949Robert DugdaleFish mouth spreader
US3038467 *29 Aug 196012 Jun 1962Sklar Mfg Co JSurgical instrument
US3176682 *18 Mar 19636 Apr 1965Wexler David JSelf-retaining vaginal surgical retractor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3762400 *26 Oct 19712 Oct 1973Donald B McMedical examining instrument
US4034746 *1 Aug 197512 Jul 1977Williams Robert WRetractor
US4318388 *27 Oct 19809 Mar 1982Fogarty A EdwardLaunching device using pinching force
US4356821 *17 Sep 19802 Nov 1982Bruce RindAirway
US4365625 *20 Apr 198128 Dec 1982Bruce RindExpandable oral airway
US4722339 *6 Aug 19862 Feb 1988Fritz Gegauf Ag Bernina - NahmaschinenfabrikSurgical instrument
US4754746 *25 Sep 19865 Jul 1988Cox Kenneth LSelf-retaining metatarsal spreader
US4896661 *5 Feb 198830 Jan 1990Pfizer, Inc.Multi purpose orthopedic ratcheting forceps
US5176702 *7 Feb 19925 Jan 1993Symbiosis CorporationRatchet locking mechanism for surgical instruments
US5320637 *7 Jun 199314 Jun 1994Borders Jr Jack CSafety skin hook and method
US5476479 *11 Jan 199519 Dec 1995United States Surgical CorporationHandle for endoscopic surgical instruments and jaw structure
US5483952 *15 Feb 199416 Jan 1996United States Surgical CorporationHandle for surgical instruments
US5843125 *7 Jun 19951 Dec 1998Jempolsky; LawrenceSkin contractor
US619696921 May 19996 Mar 2001Lab Engineering & Manufacturing, Inc.Tissue retractor adapted for the attachment of an auxiliary element
US6336386 *21 Jul 20008 Jan 2002Yung Jen LeePlier device having an adjustable opening
US6416466 *28 Mar 20019 Jul 2002Ray-Ling HsiaoStructure for vagina speculum
US663507220 Jul 200021 Oct 2003SynthesSafety ratchet mechanism
US671178914 Aug 200230 Mar 2004Great Neck Saw Manufacturers, Inc.Clamp
US6860179 *3 Jun 20021 Mar 2005Irwin Industrial Tool CompanyClamp device
US6921263 *7 Jun 200226 Jul 2005Terrence L. HoranAdjustable dental instrument having a multi-detent latch
US692960613 May 200316 Aug 2005Depuy Spine, Inc.Retractor and method for spinal pedicle screw placement
US69669104 Apr 200322 Nov 2005Stephen RitlandDynamic fixation device and method of use
US700843130 Oct 20017 Mar 2006Depuy Spine, Inc.Configured and sized cannula
US709764725 Jan 200329 Aug 2006Christopher Paige SeglerTarsal joint space distractor
US716607328 Mar 200523 Jan 2007Stephen RitlandMethod and device for microsurgical intermuscular spinal surgery
US720799230 Sep 200224 Apr 2007Stephen RitlandConnection rod for screw or hook polyaxial system and method of use
US721418622 Dec 20038 May 2007Stephen RitlandMethod and device for retractor for microsurgical intermuscular lumbar arthrodesis
US745563916 Sep 200525 Nov 2008Stephen RitlandOpposing parallel bladed retractor and method of use
US748176613 Aug 200427 Jan 2009Synthes (U.S.A.)Multiple-blade retractor
US76550251 Mar 20052 Feb 2010Stephen RitlandAdjustable rod and connector device and method of use
US76823758 May 200323 Mar 2010Stephen RitlandDynamic fixation device and method of use
US769549830 Jan 200713 Apr 2010Stephen RitlandConnection rod for screw or hook polyaxial system and method of use
US772725626 Sep 20051 Jun 2010Arthrex, Inc.Grasper assembly
US775393910 Feb 200413 Jul 2010Stephen RitlandPolyaxial connection device and method
US776304720 Feb 200327 Jul 2010Stephen RitlandPedicle screw connector apparatus and method
US782441010 Aug 20042 Nov 2010Depuy Spine, Inc.Instruments and methods for minimally invasive spine surgery
US787904620 Apr 20071 Feb 2011Depuy Mitek, Inc.Suturing apparatus and method
US790984330 Jun 200422 Mar 2011Thompson Surgical Instruments, Inc.Elongateable surgical port and dilator
US79595649 Jul 200714 Jun 2011Stephen RitlandPedicle seeker and retractor, and methods of use
US798524518 Nov 200526 Jul 2011Stephen RitlandConnection rod for screw or hook polyaxial system and method of use
US802139919 Jul 200620 Sep 2011Stephen RitlandRod extension for extending fusion construct
US81924375 Jun 2012Depuy Spine, Inc.Configured and sized cannula
US822145926 Jul 201017 Jul 2012Stephen RitlandPedicle screw connector apparatus and method
US823599910 May 20107 Aug 2012Depuy Spine, Inc.Configured and sized cannula
US826257124 May 200411 Sep 2012Stephen RitlandIntermuscular guide for retractor insertion and method of use
US8267957 *14 Dec 200718 Sep 2012Holmed CorporationCompressor with extended ratchet bar feature
US836115114 Jun 201229 Jan 2013Depuy Spine, Inc.Configured and sized cannula
US844467821 Oct 201021 May 2013Depuy Spine, Inc.Instruments and methods for minimally invasive spine surgery
US848611122 Jun 200616 Jul 2013Stephen RitlandDynamic fixation device and method of use
US854073217 Dec 201024 Sep 2013Depuy Mitek, Inc.Suturing apparatus and method
US855690527 Dec 201215 Oct 2013Depuy Spine, Inc.Configured and sized cannula
US858573923 Mar 201019 Nov 2013Stephen RitlandDynamic fixation device and method of use
US868506223 Mar 20101 Apr 2014Stephen RitlandDynamic fixation device and method of use
US86909221 Mar 20108 Apr 2014Stephen RitlandDynamic fixation device and method of use
US8747410 *26 Oct 201010 Jun 2014Zimmer, Inc.Patellar resection instrument with variable depth guide
US884569419 Sep 201130 Sep 2014Warsaw Orthopedic, Inc.Rod extension for extending fusion construct
US885224413 Sep 20137 Oct 2014DePuy Synthes Products, LLCConfigured and sized cannula
US89323349 Sep 200513 Jan 2015Stephen RitlandDynamic fixation device and method of use
US90285512 Sep 201412 May 2015DePuy Synthes Products, Inc.Configured and sized cannula
US20030083689 *30 Oct 20011 May 2003Simonson Robert E.Non cannulated dilators
US20040147935 *25 Jan 200329 Jul 2004Christopher SeglerTarsal Joint Space Distractor
US20050216002 *6 Jan 200529 Sep 2005Depuy Spine, Inc.Configured and sized cannula
US20060041194 *23 Aug 200423 Feb 2006Mark SorochkinSurgical gripper with foldable head
US20060069407 *26 Sep 200530 Mar 2006Weber Robert MGrasper assembly
US20060079899 *18 Nov 200513 Apr 2006Stephen RitlandConnection rod for screw or hook polyaxial system and method of use
US20120101505 *26 Oct 201026 Apr 2012Zimmer, Inc.Patellar resection instrument with variable depth guide
US20120143241 *2 Dec 20107 Jun 2012Stephen Paul RayTissue Grasping Forceps & Localizing Needle Holder
US20120167728 *19 Dec 20115 Jul 2012Artemio MiramontesLocking Pliers with Fall Arrest Anchoring Device
USRE4252510 Jun 20025 Jul 2011Depuy Spine, Inc.Cannula and sizing insertion method
USRE4557117 Dec 201023 Jun 2015DePuy Synthes Products, Inc.Cannula and sizing insertion method
CN100405984C8 Jun 200130 Jul 2008斯恩蒂斯有限公司Safety ratchet mechanism
EP1053717A117 May 200022 Nov 2000LAB Engineering & Manufacturing, Inc.Tissue retractor
WO1989006939A1 *2 Feb 198910 Aug 1989Pfizer Hospital Product GroupMulti purpose orthopedic ratcheting forceps
WO1993015673A1 *2 Feb 199319 Aug 1993Symbiosis CorpRatchet locking mechanism for surgical instruments
WO2002007614A1 *8 Jun 200131 Jan 2002Synthes AgSafety ratchet mechanism
U.S. Classification600/217, 600/219, 606/207, 600/226, 29/239, 81/328, 606/208
International ClassificationA61B17/02, A61B17/28
Cooperative ClassificationA61B17/0206, A61B2017/2837
European ClassificationA61B17/02A