| 摘要 |
PROBLEM TO BE SOLVED: To provide a surgical instrument suitable for performing circular anastomosis and/or treatment to internal walls of hollow tissue organs.SOLUTION: A surgical instrument 10 comprises: a handle assembly 12; an elongated body portion 14 extending distally from the handle assembly 12 and regulating a longitudinal axis "A"; a head portion 16 which is disposed adjacently to the distal end of the elongated body portion 14 and includes an anvil assembly 30 and a shell assembly 31, the anvil assembly 30 being movable between positions spaced from and approximated to the shell assembly 31; and a preload assembly 100 which is disposed in mechanical cooperation with the shell assembly 31 and enables the shell assembly 31 to move longitudinally with respect to the elongated body portion 14. |
