Medical Suture Needle

Abstract

The goal is to provide a medical suture needle having, as the material, austenite stainless steel with a structure that is elongated in a fiber form while improving the hardness and flexural strength of the cutting portion. A medical suture needle (A) is made of austenite stainless steel having a structure that is elongated in fiber form, and has a cutting portion ( 1 ) and a body portion ( 2 ) with a triangular cross-sectional shape that is continuous with said cutting portion ( 1 ). The cutting portion ( 1 ) has cutting edges ( 13 ), at least one surface of which is formed by a pressed surface ( 11 ), and which are formed by the intersection of said pressed surface ( 11 ) with two sharpened surfaces ( 12 ), and a cutting edge ( 14 ) that is formed by the intersection of the two sharpened surfaces ( 12 ). The tip ( 15 ) where the various cutting edges ( 13 ) and ( 14 ) converge is positioned in the center of the pressed surface ( 11 ). Moreover, the cutting edges ( 13 ) formed by the intersection of the above pressed surface ( 11 ) with the two sharpened surfaces ( 12 ) are longer than the cutting edge ( 14 ) that is formed by the intersection of the two sharpened surfaces ( 12 ).

1 . A medical suture needle that is made of an austenitic stainless steel having a structure that is elongated in a fiber, the needle comprising:
 a cutting portion; and   a body portion that is continuous with the cutting portion and that has a triangular cross-section,   wherein the cutting portion has one surface made of a pressed surface, cutting edges formed by the intersection of the pressed surface and two grinded surfaces, and a cutting edge that is formed by the intersection of two grinded surfaces, wherein a leading end where the respective cutting edges are concentrated is positioned at the center of the pressed surface.   
     
     
         2 . The medical suture needle according to  claim 1 , wherein the cutting edges formed by the intersection of the pressed surface and two grinded surfaces are longer than the cutting edge formed by the intersection of the two grinded surfaces. 
     
     
         3 . The medical suture needle according to  claim 1 , wherein a crest is formed on the surface opposite to the pressed surface, and the grinded surfaces are formed by grinding the surface on which the crest is formed. 
     
     
         4 . The medical suture needle according to  claim 3 , wherein one end of the cutting edge formed by the intersection of two grinded surfaces is connected to a sharp tip of the medical suture needle, while the other end is continuous with an extension line of the crest at the cutting portion. 
     
     
         5 . A medical suture needle that is made of an austenitic stainless steel having a structure that is elongated in a fiber, the needle comprising:
 a cutting portion; and   a body portion that is continuous with the cutting portion and that has an elliptic shape,   
       wherein
 the cutting portion has upper and lower surfaces made of pressed surfaces, cutting edges formed by the intersection of one of the upper and lower pressed surfaces and two grinded surfaces, and a cutting edge that is formed by the intersection of two grinded surfaces, wherein a leading end where the respective cutting edges are concentrated is positioned at the center of the pressed surface that intersects the two grinded surfaces to form the cutting edges. 
 
     
     
         6 . The medical suture needle according to  claim 5 , wherein the cutting edges formed by the intersection of the pressed surface and two grinded surfaces are longer than the cutting edge formed by the intersection of the two grinded surfaces. 
     
     
         7 . The medical suture needle according to  claim 5 , wherein one end of the cutting edge formed by the intersection of two grinded surfaces is connected to a sharp tip of the medical suture needle, while the other end is continuous with the pressed surface, of one of the upper and lower pressed surfaces, which does not form the cutting edge. 
     
     
         8 . The medical suture needle according to  claim 6 , wherein one end of the cutting edge formed by the intersection of two grinded surfaces is connected to a sharp tip of the medical suture needle, while the other end is continuous with the pressed surface, of one of the upper and lower pressed surfaces, which does not form the cutting edge.