Retractable disposable tip reusable trocar obturator

摘要: A manual dilating trocar uses an automatically retracting stylet. The stylet is threaded through a obturator which is, in turn, inserted into sheath. spring near the handle of serves to urge cutting tip retracted position so that it can be held within obturator. When surgeon seeks pierce body cavity as perform laparoscopic surgery or like, engaged overcome bias stylet's exposed. Upon piercing exterior body-cavity layer, may withdrawn ensure no underlying organs tissue are damaged by sharp tip. Once dilation initial wound has been completed and sheath introduced cavity, also removed from order provide channel cavity. In alternative embodiment, biased expose tip, lock pin used energy stored brought bear upon deliver thrust against any tough obstructive tissue.