Wire-stranded hollow coil body, a medical equipment made from the same

Abstract

A wire-stranded hollow coil body ( 1 ) has a multitude of coil line elements ( 2 ) stranded along a predetermined circular line to form a flexible wire tube having a central axial hollow portion ( 3 ), the flexible wire tube is stranded under a strand-turn resistant load and heat treated to remove a residual stress upon formation so as to provide a high rotation-following capability and a high straightness.

1 . A wire-stranded hollow coil body, comprising: a multitude of coil line elements stranded along a predetermined circular line to form a flexible linear tube having a central axial hollow portion, whereby said flexible linear tube is stranded under a strand-turn resistant load and heat treated to remove a residual stress upon formation so as to provide a high rotation-following capability and a high straightness.  
   
   
       2 . A wire-stranded hollow coil body according to  claim 1 , wherein said flexible linear tube is lengthwisely divided into pluralistic sections, each of which has different a number of strand turns.  
   
   
       3 . A wire-stranded hollow coil body according to  claim 1 , wherein said flexible linear tube is lengthwisely divided into pluralistic sections, each of which has residual stresses removed in different degrees.  
   
   
       4 . A wire-stranded hollow coil body according to any one of  claims 1  to  3 , wherein an outer surface of said flexible linear tube is ground in concentric relationship with said predetermined circular line.  
   
   
       5 . A wire-stranded hollow coil body according to  claim 1 , wherein an outer surface of said flexible linear tube is ground by an electrolytic polishing in concentric relationship with said predetermined circular line.  
   
   
       6 . A wire-stranded hollow coil body according to  claim 1 , wherein said coil line elements are austenitic stainless steel.  
   
   
       7 . A medical endscope having a cloak tube including said wire-stranded hollow coil body according to  claim 1 .  
   
   
       8 . A medical endscope treating tool having a coil sheath portion including said wire-stranded hollow coil body according to  claim 1 .  
   
   
       9 . A medical endscope treating tool having a manipulating sheath portion including said wire-stranded hollow coil body according to  claim 1 .  
   
   
       10 . A medical guide wire having a main wire body including said wire-stranded hollow coil body according to  claim 1 .  
   
   
       11 . A pressure sensor type medical guide wire having a main wire component including said wire-stranded hollow coil body according to  claim 1.