Surgical obturator
1 Assignment
0 Petitions
Accused Products
Abstract
In a surgical obturator for piercing a body wall, comprising a tubular housing that at one end forms an introduction tip with a continuously decreasing diameter, and comprising a blade projecting from the introduction tip for making an incision in the body wall, in order to reduce the risk of injury during piercing of the body wall it is proposed that the introduction tip comprises a central protective cap, which is displaceable in longitudinal direction relative to the introduction tip between an advanced inoperative position and a retracted working position, that the blade in the housing is displaceable in longitudinal direction between an advanced cutting position and a retracted protected position, that disposed in the housing is a retraction device that displaces the blade from the cutting position into the protected position, and that the retraction device may be activated by a displacement of the protective cap from the working position into the inoperative position.
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Citations
37 Claims
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1-18. -18. (canceled)
- 19. Surgical obturator for piercing a body wall, comprising a tubular housing that at one end forms an introduction tip with a continuously decreasing diameter, comprising a blade projecting from the introduction tip for making an incision in the body wall, and comprising a protective element, which is displaceable in longitudinal direction relative to the housing between an advanced inoperative position and a retracted working position, wherein the blade in the housing is displaceable in longitudinal direction between an advanced cutting position and a retracted protected position, wherein disposed in the housing is a retraction device that displaces the blade from the cutting position into the protected position, and wherein the retraction device can be activated by a displacement of the protective element from the working position into the inoperative position, wherein the introduction tip is subdivided into two portions, namely a proximal portion, which is part of the housing, and a central protective cap forming the protective element, wherein the outer surface of the protective cap in the retracted working position merges continuously into the outer surface of the proximal portion, whereas in the advanced inoperative position a step is formed between the protective cap and the proximal portion of the introduction tip, and wherein the blade in the cutting position projects in the region of the retracted protective cap and in an adjoining region of the proximal portion from the contour of the protective cap and of the proximal portion.
Specification