| 摘要 |
An improved circular anastomosis surgical stapling instrument (10) for joining hollow tubular organs, has a body (12) having a staple-carrying assembly (20) at its distal end, a centered longitudinally extensible and retractable main shaft (16) centered in the body, (12) and an anvil (22) opposed to the staple-carrying assembly, (20) and is characterized by a separate shaft segment (25) frictionably connectible with the end of the main shaft, (16) the shaft segment (25) having a free end and an end carrying the anvil. The main shaft has a hollow free end and the free end of the shaft segment (25) is releasably receivable in the hollow end of the main shaft (16). In a preferred form the end of the main shaft (16) is provided with a plurality of several radially-extending arms (45) positioned to overlie the main shaft (16) but having spring hinges (48) biasing them radially outwardly away from the main shaft (16). The instrument further includes a second shaft segment (54) releasably receivable in the hollow of the main shaft (16) which second shaft segment (54) has a conical pointed unit (52) at its distal end. |
