FR2688684A1 - Surgical pin extractor using kinetic force and automatic blocking of the pin on the apparatus - Google Patents

Surgical pin extractor using kinetic force and automatic blocking of the pin on the apparatus Download PDF

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Publication number
FR2688684A1
FR2688684A1 FR9201982A FR9201982A FR2688684A1 FR 2688684 A1 FR2688684 A1 FR 2688684A1 FR 9201982 A FR9201982 A FR 9201982A FR 9201982 A FR9201982 A FR 9201982A FR 2688684 A1 FR2688684 A1 FR 2688684A1
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France
Prior art keywords
spindle
pins
pin
plate
guide
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Withdrawn
Application number
FR9201982A
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French (fr)
Inventor
Bergue Bertrand
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Individual
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Individual
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Publication date
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Priority to FR9201982A priority Critical patent/FR2688684A1/en
Publication of FR2688684A1 publication Critical patent/FR2688684A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices

Abstract

Device making it possible to pull out surgical pins. The invention allows easy and adapted extraction of surgical pins with different diameters, without bearing on the support into which they are driven. It consists of an outer part (1, 2) sliding on an inner part (3, 4, 6) until it abuts thereon. Throwing the body (1) facilitates extraction of the pin by the kinetic energy released at the moment of this arrival in abutment. Furthermore, the inner part (3, 4, 6) produces automatic blocking of the pin introduced into the apparatus by bracing of a plate (6) which lies in the inner part and which is positioned obliquely with respect to the axis of the pin, either by gravity or by the inertia created at the moment of throwing the body (1). The device according to the invention is particularly intended for extracting surgical pins.

Description

La présente invention concerne un arracheur de broches chirurgicales composte d'un système réalisant le coincement de la broche et d'un corps qui,mis en mouvement par l'opérateur, fourni l'energie nécessaire à son extraction. The present invention relates to a surgical pin puller made up of a system which pinches the pin and a body which, set in motion by the operator, provides the energy necessary for its extraction.

Tout ceci sans prendre appui sur le support dans lequel les broches sont enfoncées.All this without leaning on the support in which the pins are inserted.

L'éxtraction des broches chirurgicales est traditionnellement effectue selon des modes opératoires gui sont:
*A l'aide d'instruments standards de chirurgien qui permettent d'extraire les broches.Les problémes essentiels sont l'utilisation d'outils non adaptés qui peuvent etre détériorés et l'inéffiacité de ces outils qui rendent l'extraction anormalement lonue et delicate.The extraction of surgical pins is traditionally carried out according to procedures which are:
* Using standard surgeon's tools to extract the pins. The main problems are the use of unsuitable tools which can be damaged and the ineffectiveness of these tools which make the extraction abnormally long and delicate.

*A l'aide de moteur muni de mandrin pouvant etre serrez sur l'extrmîtô de la broche ,les problémes résultant de cette méthode sont la complexité de mise en place dri moteur, la mauvaise maniabilité du moteur et enfin l'utilisation inadaptée d'un moteur que l'on met en rotation sous charge. * Using a motor fitted with a mandrel that can be tightened on the end of the spindle, the problems resulting from this method are the complexity of setting up the motor, the poor maneuverability of the motor and finally the unsuitable use of a motor which is rotated under load.

*A l'aide d' un mandrin å bl ocage rapide monte sur une poignée en té.Les deux principaux inconvônients sont la durée de l'opération et le manque de confort. * Using a quick release chuck mounts on a tee handle. The two main drawbacks are the duration of the operation and the lack of comfort.

A l'aide d'une pince pou certaines broches munies d'une tête mais il faut toujours soit taper sous la pince soit faire des mouvements circulaires d'extraction.  With the help of pliers for certain pins provided with a head but it is always necessary either to tap under the pliers or to make circular movements of extraction.

Le dispositif selon l'invention permet de remédier à ces inconvénients.En effet selon une premiers caracteristique la partie interne cylindrique de l'appareil réalise un blocage automatique de la broche à retirer dis sa mise en place â l'intérieur d'un trou qui traverse d'axe en axe l'ensemble de l'appareil.Cette partie interne constituée de deux éléments (le guide et le coulisseau) dessine un cylindre perce d'axe en axe dont l'extrémité supérieure a un épaulement ;elle posséde un évidement dont le plan inférieur est utilement incliné.C'est dans cet évidement que se trouve une plaquette dont le diamétre du trou est légérement supérieur à celui de la broche pour une épaisseur inférieure a ce meme diamétre.La mise en place de la broche tend â positionner perpendiculairement à son axe la plaquette pour pouvoir la traverser.La gravite de la plaquette ou l'inertie provoquée par l'utilisation de l'appareil tend a rapprocher la plaquette du plan incliné réalisant par arc-boutement le blocage de la broche sur cette partie interne.Selon une seconde caractéristique cette partie interne est inclue a A l'intérieur d'un manchon cylindrique,elle a une mobilité axiale réduite par tin bouchon fixé sur la partie supérieure de 11appareil et un épaulement interne à la partie inférieure qui limite le glissement vers le bas de la partie interne.L'opérateur utilise alors la course du manchon qu'il lance le long de la partie interne jusqu'à le metttre en butte sur l'épaulement de la partie interna.L'energie cinétique ainsi libérée facilite l'extraction de la broche,Un ressort inclus entre les parties internes et externes met la partie interne en position rétractée quand l'appareil est au repos. The device according to the invention makes it possible to remedy these drawbacks. In fact, according to a first characteristic, the cylindrical internal part of the device automatically locks the spindle to be withdrawn when it is placed inside a hole which crosses the entire device from axis to axis. This internal part consists of two elements (the guide and the slide) draws a cylinder drilled from axis to axis whose upper end has a shoulder; it has a recess whose lower plane is usefully inclined. It is in this recess that there is a plate whose diameter of the hole is slightly greater than that of the spindle for a thickness less than this same diameter. The positioning of the spindle tends to position the plate perpendicular to its axis to be able to cross it. The gravity of the plate or the inertia caused by the use of the device tends to bring the plate closer to the inclined plane ant by bracing blocking of the spindle on this internal part. According to a second characteristic this internal part is included inside a cylindrical sleeve, it has a reduced axial mobility by a plug fixed on the upper part of 11apparatus and an internal shoulder at the lower part which limits the sliding down of the internal part. The operator then uses the race of the sleeve which he launches along the internal part until he hits it on the shoulder of the internal part. The kinetic energy thus released facilitates the extraction of the spindle, A spring included between the internal and external parts puts the internal part in the retracted position when the device is at rest.

Selon des modes particuliers de réalisation:
-Un ressort peut etre mis en place pour maintenir I, plaquette appuyée sur le plaii incline quelque soit la position d'utilisation.According to particular embodiments:
-A spring can be put in place to maintain I, plate pressed on the plaii inclines whatever the position of use.

-Le guide et le colllisseau peuvent être réalises en une seule pince possédant une fenêtre pour la mise en place de la plaquette. -The guide and the collisseau can be made in a single clamp having a window for the positioning of the plate.

-Le guide et la plaquette pourront être unique pour différents diamètres de broches. -The guide and the plate can be unique for different pin diameters.

-On pourra utiliser différents guides et différentes plaquettes suivant le diamètre des broches. -We can use different guides and different pads depending on the diameter of the pins.

Les dessins annexes illustrent l'invention:
-la figure 6 représente le dispositif selon l'invention.The accompanying drawings illustrate the invention:
FIG. 6 represents the device according to the invention.

-les figures 1 à 5 représentent des piéces particuliéres de l'invention. FIGS. 1 to 5 represent particular parts of the invention.

En référence à ces dessins , le dispositif posséde un corps cylindrique creux (1) sur lequel a été réalisé un filetage externe sur l'une des extrémités.A l'intérieur sur l'autre extrémité sont réalisés deux épaulements.Sur l'épaulement de diamétre supérieur vient s'appuyer un ressort de rappel (5) de telle sorte que l'autre extrt-nite du ressort se situe du cotè du filetage réalisé sur le corps(1).Sur l'épaulement de diamétre inférieur vient taper le coulisseau (3) quand l'appareil est en fonction.Ce coulisseau (3) de forme cylindrique a un épaulement externe à l'extrémité supérieur , à l'extrémité opposée il a un évidement interne dont l'entrée est filetée et enfin il est percé longitudinalement å un diamètre correspondant å celui des broches.La réunion du coulisseau (3) et du guide (4) réalise un logement cylindrique dont le plan supérieur est orthogonal A l'ase de 11appareil et dont le plan inférieur, réalisé sur le guide, est incliné par rapport fi ce meme axe.Ce logement contient une plaquette (6) percée en son centre comme le guide ,au diamétre des broches 4 retirer.Cette partie interne(3,4,6) se trouve à l'intèrieur du corps (1) en conservant un mouvement de translation par rapport a celui-ci et étant maintenll au repos par un ressort (5) compris entre l'épaulement interne du corps et l'épaulement externe du coulisseau.Le corps contenant l'ensemble (3,4,6) est fermé en sa partie supérieure filetée par un bouchon (2).La mise en place de la broche 9 l'intérieur de l'appareil positionne la plaquette Q l'horizontal pour permettre le passage de celle-ci.Puis par gravité ou par l'inertie due au lancement du corps la plaquette tend å s'incliner et fi coincer la broche.Le glissement du corps sur la partie interne (3,4,6) emmagasine l'énergie cinétique qui permet en arrivant en butée sur le coulisseau(3) d'extraire plus facilement la broche.  With reference to these drawings, the device has a hollow cylindrical body (1) on which an external thread has been produced on one of the ends. Inside on the other end are made two shoulders. On the shoulder of upper diameter comes to bear a return spring (5) so that the other end of the spring is located on the side of the thread made on the body (1). On the shoulder of smaller diameter comes to strike the slide (3) when the appliance is in operation. This cylindrical slide (3) has an external shoulder at the upper end, at the opposite end it has an internal recess whose entry is threaded and finally it is pierced longitudinally to a diameter corresponding to that of the pins. The union of the slide (3) and the guide (4) produces a cylindrical housing whose upper plane is orthogonal to the base of the apparatus and whose lower plane, produced on the guide, is tilted relative to the same axis. This housing contains a plate (6) pierced in its center as the guide, to the diameter of the pins 4 remove. This internal part (3,4,6) is located inside the body (1 ) maintaining a translational movement relative thereto and being maintll at rest by a spring (5) between the internal shoulder of the body and the external shoulder of the slide. The body containing the assembly (3,4 , 6) is closed in its threaded upper part by a plug (2). The installation of the pin 9 inside the device positions the plate Q horizontally to allow the passage thereof. gravity or by the inertia due to the launching of the body the plate tends to tilt and fi wedge the spindle. The sliding of the body on the internal part (3,4,6) stores the kinetic energy which allows arriving at the stop on the slide (3) to extract the spindle more easily.

Claims (5)

REVENDICATIONS 1)Le dispositif permet d'arracher des broches chirurgicales de diamètres différents sans prendre appui sur le support dans lequel elles sont enfoncées.L'ensemble de l'appareil est utilement percé dans son axe longitudinal Q un diamètre correspondant aux broches A retirer.La partie interne constituée du coulisseau (3) du guide (4) et de la plaquette (6) réalise le blocage de la broche sur l'appareil.L'ensemble coulisseau (3) et guide (4) réalisent un évidement dont le plan supérieur est orthogonal a 1 'axe de la broche et dont le plan inférieur est incline d'un angle adapté par rapport A celui-ei Cet évidement renferme une plaquette (6) qui se positionne perpendiculairement A l'axe de l'appareil pou permettre l l'introduction de la broche. La plaquette (6) tend à se positionner par gravité ou inertie sur le plan incliné et bloque alors la broche par arc-bout~ement lorsqu'une traction est faite sur l'ensemble (3,4,6).Par ailleurs cet ensemble est disposé à l'intérieur d'un corps (1) fermé par un bouchon (2).Les deux piéces (1,2) ont un mouvement de translation limité sur les piécs (3,4,6) dans l'axe de la broche par la rencontre de l'épaulement interne du corps (1) avec l'épaulement externe du coulisseau (3).Enfin entre la partie interne (3,4,6) et la partie externe (1,2) se trouve un ressort de rappel (5) maintenant la partie interne rétractée å l'intérieur de l la partie externe.L'appareil mis en position sur la broche, l'opérateur le met en mouvement ce qui assure d'abord le blocage de la partie interne (3,4,6) sur la broche par arc-boutement puis emmagasine l'énergie cinétique qui facilite l'extraction de la broche quand en fin de course la partie externe (1,2) vient en buthe sur la partie interne (3,4,6).  1) The device makes it possible to tear off surgical pins of different diameters without resting on the support in which they are inserted. The entire device is usefully pierced in its longitudinal axis Q with a diameter corresponding to the pins to be removed. internal part consisting of the slide (3) of the guide (4) and of the plate (6) locks the spindle on the device. The slide assembly (3) and guide (4) create a recess whose upper plane is orthogonal to the axis of the spindle and the lower plane of which is inclined at a suitable angle with respect to this. This recess contains a plate (6) which is positioned perpendicular to the axis of the device to allow the the introduction of the spindle. The plate (6) tends to be positioned by gravity or inertia on the inclined plane and then blocks the spindle by arch-end when a pull is made on the assembly (3,4,6). is arranged inside a body (1) closed by a plug (2) .The two parts (1,2) have a limited translational movement on the parts (3,4,6) in the axis of the spindle by the meeting of the internal shoulder of the body (1) with the external shoulder of the slide (3). Finally between the internal part (3,4,6) and the external part (1,2) is a return spring (5) keeping the internal part retracted inside the external part. The device placed in position on the spindle, the operator sets it in motion which first ensures the blocking of the internal part (3,4,6) on the spindle by bracing then stores the kinetic energy which facilitates the extraction of the spindle when at the end of the race the external part (1,2) comes into buthe on the internal part (3,4,6). 2)Dispositif selon la revendication 1 caractérisé en ce que le guide (4) et le coulisseau (3) sont réalisées dans une même piNce. 2) Device according to claim 1 characterized in that the guide (4) and the slide (3) are made in the same part. 3)Dispositif selon la revendication 1 et 2 caractérisé en ce qu'un ressort est mis en place pour tendre 9 maintenir la plaquette (6) appuyé sur le plan incline. 3) Device according to claim 1 and 2 characterized in that a spring is put in place to tension 9 keep the plate (6) supported on the inclined plane. 4)Dispositif selon l'une quelconque des revendications caractérisé en ce que le guide est unique pour différents diamètres de broches. 4) Device according to any one of claims characterized in that the guide is unique for different diameters of pins. 5)Dispositif selon l'une quelconque des revendications caractérisé en ce que l'on utilise différents guides et différentes plaquettes suivant le diamètre des broches.  5) Device according to any one of claims characterized in that one uses different guides and different plates according to the diameter of the pins.
FR9201982A 1992-02-21 1992-02-21 Surgical pin extractor using kinetic force and automatic blocking of the pin on the apparatus Withdrawn FR2688684A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9201982A FR2688684A1 (en) 1992-02-21 1992-02-21 Surgical pin extractor using kinetic force and automatic blocking of the pin on the apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9201982A FR2688684A1 (en) 1992-02-21 1992-02-21 Surgical pin extractor using kinetic force and automatic blocking of the pin on the apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100398075C (en) * 2005-07-05 2008-07-02 上海第二工业大学 Hollow soft drill and its manufacturing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301236A (en) * 1951-03-13 1954-08-31 Walter Dr Med Hartenbach Puller for easier removal of nails driven in during treatment of injured or diseased bones.
GB1022328A (en) * 1963-09-26 1966-03-09 Synthes Ag Improvements in or relating to intramedullary nails for use in bone surgery and instruments for use in fitting and extracting such nails
US4009804A (en) * 1974-07-17 1977-03-01 Loctite Corporation Anti-drool extrusion device
GB1555455A (en) * 1976-06-11 1979-11-07 Cox Mastic Appliances Ltd P C Dispensing gun
WO1980000534A1 (en) * 1978-09-04 1980-04-03 Schwarzkopf Dev Co Device for insertion and extraction of medullary nails

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301236A (en) * 1951-03-13 1954-08-31 Walter Dr Med Hartenbach Puller for easier removal of nails driven in during treatment of injured or diseased bones.
GB1022328A (en) * 1963-09-26 1966-03-09 Synthes Ag Improvements in or relating to intramedullary nails for use in bone surgery and instruments for use in fitting and extracting such nails
US4009804A (en) * 1974-07-17 1977-03-01 Loctite Corporation Anti-drool extrusion device
GB1555455A (en) * 1976-06-11 1979-11-07 Cox Mastic Appliances Ltd P C Dispensing gun
WO1980000534A1 (en) * 1978-09-04 1980-04-03 Schwarzkopf Dev Co Device for insertion and extraction of medullary nails

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100398075C (en) * 2005-07-05 2008-07-02 上海第二工业大学 Hollow soft drill and its manufacturing method

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