Tissue everting needle
AssigneeUnited States Surgical Corporation
InventorsYong Hua Zhu, Wolff M. Kirsch, Robert B. Cushman, Frank C. Maffei
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Abstract
A needle for everting body tissue is a linear member having a back portion, an arcuate tissue penetrating portion, and a generally U-shaped tissue everting portion therebetween. The U-shaped tissue everting portion includes a base and first and second tissue abutment arms, the back portion preferably being collinear with the first arm and oriented at an angle with respect to the base. The needle can be incorporated into an instrument for use in endoscopic procedures. In such instruments the needle can be attached in a fixed position with respect to the instrument, or retractable within a tubular sleeve.
Claims20
A needle for everting body tissue which comprises:
- a substantially U-shaped portion defined by a base and first and second tissue stop portions extending from the base, a back portion extending from the first tissue stop portion, and an arcuate tissue penetrating portion extending at an angle to the second tissue stop portion.
A needle for everting body tissue which comprises:
- a substantially U-shaped portion defined by a base and first and second tissue stop portions extending from the base, a back portion extending from the first tissue stop portion, and a tissue penetrating portion extending at an angle to the second tissue stop portion, wherein the tissue penetrating portion is connected to the second tissue stop portion at a first bend region characterized by an angle of from about 110.degree. to about 130.degree..
A surgical needle having a support shaft, an arcuate tissue penetrating tip and a hook for everting body tissue, wherein the hook comprises a U-shaped portion having tissue abutting sides wherein the arcuate tissue penetrating tip extends from an end of the u-shape portion so as to define an angled bend.
A surgical needle comprising a generally J-shaped linear member having a linear back portion, an arcuate tissue penetrating portion, and a U-shaped tissue everting portion between the back portion and the tissue penetrating portion wherein the arcuate tissue penetrating tip extends from an end of the u-shape tissue everting portion so as to define an angled bend.
A tissue everting instrument comprising an elongated body and a generally J-shaped needle operatively associated therewith, the needle having a back portion, an arcuate tissue penetrating portion and a generally U-shaped tissue everting portion between the back portion and the tissue penetrating portion.
A method for everting body tissue comprising:
- a) providing a needle having a back portion, a tissue penetrating portion, and a tissue everting portion between the back portion and the tissue penetrating portion;
- b) inserting the tissue penetrating portion of the needle through a first layer of body tissue from an outside surface of the first layer through an inside surface of the first layer to enable the tissue everting portion of the needle to evert an end portion of the first layer
- c) inserting the tissue penetrating portion of the needle through a second layer of body tissue from the inside surface of the second layer to the outside surface of the first layer, to enable the tissue everting portion of the needle to evert an end portion of the second layer such that the inside surface of the second layer is in contact with the inside surface of the first layer.
Dependencies are inferred from the claim text.