Surgical cutting instrument
First Claim
1. A surgical cutting instrument comprising:
- an outer sheath tube having an open distal end and a proximal end secured to a grip of the instrument;
an inner stationary tube having a closed distal end which tube is disposed within said outer sheath tube in such a manner that the distal end of said inner tube projects from said open distal end of said outer sheath tube and its proximal end is secured to said grip;
a cutting opening provided on the peripheral wall of said projected distal end of the inner tube so as to define a cutting edge on the edge of said cutting opening for drawing cut tissue chips;
a sliding member which is slidably provided between said outer sheath tube and said inner tube so that the distal end of said sliding member can open and close said cutting opening, said sliding member having an outer cutting edge which engages said inner cutting edge of said cutting opening on the distal end of said sliding member;
drive means for axially and slidingly reciprocating said sliding member so as to open and close said cutting opening; and
suction and discharge means connected to said inner tube so as to communicate therewith for effecting the suction operation through a suction channel formed in said inner tube.
1 Assignment
0 Petitions
Accused Products
Abstract
A surgical cutting instrument essentially comprises an outer sheath tube, an inner stationary tube which is disposed within said outer sheath tube such that the distal end of the inner tube projects from the distal end of the outer sheath tube and is provided with a cutting opening for drawing cut tissue chips at the peripheral wall of the distal end of the inner tube and a sliding member which is slidably disposed between said outer sheath tube and said inner tube so as to open and close said cutting opening and is provided with an outer cutting edge which engages an inner cutting edge of said cutting opening, on the distal end edge of the sliding member, whereby a body tissue is cut by axially and slidingly reciprocating said sliding member to open and close said cutting opening and cut tissue chips are withdrawn from the body by suction through a suction channel of the inner tube.
369 Citations
10 Claims
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1. A surgical cutting instrument comprising:
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an outer sheath tube having an open distal end and a proximal end secured to a grip of the instrument; an inner stationary tube having a closed distal end which tube is disposed within said outer sheath tube in such a manner that the distal end of said inner tube projects from said open distal end of said outer sheath tube and its proximal end is secured to said grip; a cutting opening provided on the peripheral wall of said projected distal end of the inner tube so as to define a cutting edge on the edge of said cutting opening for drawing cut tissue chips; a sliding member which is slidably provided between said outer sheath tube and said inner tube so that the distal end of said sliding member can open and close said cutting opening, said sliding member having an outer cutting edge which engages said inner cutting edge of said cutting opening on the distal end of said sliding member; drive means for axially and slidingly reciprocating said sliding member so as to open and close said cutting opening; and suction and discharge means connected to said inner tube so as to communicate therewith for effecting the suction operation through a suction channel formed in said inner tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification