Tissue fastener

Abstract

This tissue fastening apparatus is a tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, including: a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, the second tissue fixation portion continuing into the first tissue fixation portion, in which when falling off first and second biological tissue necrotized by being clamped between the first tissue fixation portion and the second tissue fixation portion, the tissue fastener moves only from the second tissue fixation portion to the first tissue fixation portion side and falls off.

1 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, the second tissue fixation portion continuing into the first tissue fixation portion, wherein   when falling off first and second biological tissue necrotized by being clamped between the first tissue fixation portion and the second tissue fixation portion, the tissue fastener moves only from the second tissue fixation portion to the first tissue fixation portion side and falls off.   
   
   
       2 . The tissue fastener according to  claim 1 , wherein a diameter of at least a part of the first tissue fixation portion is set to be larger than a diameter of the second tissue fixation portion. 
   
   
       3 . The tissue fastener according to  claim 1 , wherein a tip portion of the first tissue fixation portion is inclined with respect to other portions of the first tissue fixation portion. 
   
   
       4 . The tissue fastener according to  claim 1 , wherein a number of coil turns of the first tissue fixation portion is larger than that of the second tissue fixation portion. 
   
   
       5 . The tissue fastener according to  claim 1 , wherein a coil turn density of the first tissue fixation portion is lower than that of the second tissue fixation portion. 
   
   
       6 . The tissue fastener according to  claim 1 , wherein an anchoring body is attached around the first tissue fixation portion, the anchoring body flowing along a surface of the first biological tissue. 
   
   
       7 . The tissue fastener according to  claim 1 , wherein a diameter of the elastic wire of the first tissue fixation portion is larger than that of the elastic wire of the second tissue fixation portion. 
   
   
       8 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   an elastic wire of at least a linking portion between the first tissue fixation portion and the second tissue fixation portion is made of a multitude of thin wires being stranded.   
   
   
       9 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   around an outer circumference of an elastic wire of at least a linking portion between the first tissue fixation portion and the second tissue fixation portion, a thin wire is wound.   
   
   
       10 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   the first tissue fixation portion is arranged around an outer circumference of the second tissue fixation portion.   
   
   
       11 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in two-tier large and small coils, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, the second tissue fixation portion continuing into the small coil of the first tissue fixation portion.   
   
   
       12 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, the second tissue fixation portion continuing into the first tissue fixation portion, wherein   a linking portion between the first tissue fixation portion and the second tissue fixation portion passes through a central portion of the coil.   
   
   
       13 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue;   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue; and   a cap formed in a cylindrical shape and having a female thread portion to fit onto the first tissue fixation portion therein and a ring-shaped stretching portion that stretches toward the second tissue fixation portion side when the female thread portion is fitted onto the first tissue fixation portion.   
   
   
       14 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of a tubular elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of a tubular elastic wire wound in a coil, that is locked on the second biological tissue.   
   
   
       15 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue;   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue; and   an outer circumference spring portion that extends from a tip of the first tissue fixation portion outwardly in a radial direction and that returns to the second tissue fixation portion side to press the first biological tissue.   
   
   
       16 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   a height of the coil of the first tissue fixation portion is set to 1.5 mm or more.   
   
   
       17 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   a height of the coil of the second tissue fixation portion is set to 0.5 mm or more.   
   
   
       18 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   an initial tension of a part of a tip end side of the second tissue fixation portion is set to be smaller than that of other portions of the second tissue portion.   
   
   
       19 . The tissue fastener according to  claim 18 , wherein an initial tension of substantially one turn of the second tissue fixation portion is set to be smaller than that of other portions of the second tissue portion. 
   
   
       20 . A tissue fastener for clamping first biological tissue and second biological tissue so as to be in close contact with each other, comprising:
 a first tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the first biological tissue; and   a second tissue fixation portion, made of an elastic wire wound in a coil, that is locked on the second biological tissue, wherein   a part of a tip end side of the second tissue fixation portion is not closely wound.   
   
   
       21 . The tissue fastener according to  claim 20 , wherein substantially one turn of the tip end side of the second tissue fixation portion is not closely wound. 
   
   
       22 . The tissue fastener according to  claim 15 , wherein the outer circumference spring portion presses the first biological tissue to the second biological tissue side. 
   
   
       23 . The tissue fastener according to  claim 22 , wherein an initial tension of the coil of the first tissue fixation portion is set to be stronger than an amount of force with which the outer circumference spring portion presses the first tissue fixation portion when the tissue fastener is placed in a living body. 
   
   
       24 . The tissue fastener according to  claim 22 , wherein the outer circumference spring portion is set to be smaller than that of the first and second tissue fixation portions.