A trocar

Trocart

Abstract

A generally cylindrical trocar, for forming a hole in the abdominal wall of a patient to receive a cannula, comprises: cutting means (6); support means (10, 14) for the cutting means, a guard (24) mounted on the support means for axial movement between a forward position in which the guard covers the cutting means and a retracted position in which the cutting means are exposed, and a spring (42) acting between the support means and the guard to bias the guard towards its forward position. The cutting means is provided by two generally triangular blades (2, 4) forming a cruciform blade arrangement with cutting edges (3) inclined to the axis of the trocar.
Un trocart généralement cylindrique servant à percer un trou dans la paroi abdominale d'un patient, afin de passer une canule, comprend: des moyens coupants (6); des moyens de support (10, 14) des moyens coupants; une garde (24) montée sur le moyen de support pour effectuer un déplacement axial entre une position vers l'avant, dans laquelle la garde recouvre les moyens coupants, et une position retirée, dans laquelle les moyens coupants sont découverts; ainsi qu'un ressort (42) agissant entre les moyens de support et la garde, de façon à solliciter celle-ci vers sa position avancée. Les moyens coupants sont constitués par deux lames (2, 4) généralement triangulaires formant une disposition cruciforme, dont les bords coupants (3) sont inclinés vers l'axe du trocart.

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NO-Patent Citations (0)

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Cited By (22)

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    DE-4429744-A1February 29, 1996Martin StorzSafety trocar for use by surgeons
    DE-4429744-C2October 21, 1999Martin StorzChirurgischer Sicherheitstrokar
    EP-0768064-A1April 16, 1997Ethicon Endo-Surgery, Inc.Trokar mit einer verbesserten Spitzgestaltung
    EP-0769278-A3May 21, 1997United States Surgical CorporationSystème de trocart modulaire et ses procédés d'assemblage
    EP-1402827-A1March 31, 2004United States Surgical CorporationModular trocar system
    ES-2088372-A1August 01, 1996Wais Med LtdInstrumento quirurgico para la insercion por impacto de una aguja trocar intraosea
    GB-2295319-AMay 29, 1996Microsurgical Equipment LtdGuarded cannula for a trocar system
    US-5709671-AJanuary 20, 1998Ethicon Endo-Surgery, Inc.Trocar having an improved tip configuration
    US-5776112-AJuly 07, 1998Ethicon Endo-Surgery, Inc.Trocar having an improved tip configuration
    US-5807338-ASeptember 15, 1998United States Surgical CorporationModular trocar system and methods of assembly
    US-5980493-ANovember 09, 1999United States Surgical CorporationModular trocar system and methods and assembly
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    US-9078698-B2July 14, 2015Covidien LpBladeless obturator for use in surgical trocar assembly
    US-9226774-B2January 05, 2016Covidien LpVisual obturator with tip openings
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    WO-0191653-A3May 16, 2002Genicon LcSysteme de trocart a trocart protege, canule a elements de prehension, logement d'extremite amovible, systeme de clapet souple, et methodes associees