| 摘要 |
A natural orifice translumenal endoscopic surgery (NOTES) device includes a puncture needle, dilator sheaths and working sheaths. The puncture needle includes a puncture end and a protruding safety stud situated substantially at a middle section of the puncture needle. Each dilator sheath has an insert end and a position limit end, and each dilator is sheathed sequentially onto the puncture needle, and the position limit end is stopped by the safety stud of the puncture needle, such that the insert end will not exceed the puncture end and will form a safety interval from the puncture end. The working sheath is provided for inserting and retracting the dilator sheaths and the puncture needle to form a space required for a surgical operation after the dilator sheaths have expanded a natural orifice, so as to provide a safe and convenient use of NOTES.
|
