Rotatable Barrel Surgical Apparatus for Transanal Endoscopic Microsurgery
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Solution Overview
Problem
Conventional surgical apparatuses for transanal endoscopic microsurgery (TEM) face challenges with lateral rotation, causing inconvenience in adjusting the operation area, leading to interference between the endoscope and surgical instruments, and increased risk of injury due to a larger barrel diameter.
Innovation Solution
A surgical apparatus with a rotatable barrel that allows independent rotation of surgical instruments, maintaining a uniform visual field and reducing the barrel's outer diameter, preventing interference and minimizing patient injury, by incorporating a rotary part and rotation angle adjustment unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conventional surgical apparatus for TEM is entirely rotated to adjust the operation area, then the operation area can be changed, but the endoscope screen is unintentionally rotated causing inconvenience of re-adjustment
Solution Approach 1:
The apparatus is divided into independently rotatable components: the barrel can rotate around the longitudinal axis while the endoscope remains fixed in its insertion port. This segmentation allows the barrel to be rotated to access different operation areas without rotating the endoscope, thus maintaining stable screen orientation while providing operational flexibility.
2Device complexity
If the surgical apparatus for TEM is disposed in a barrel together with the endoscope and various surgical instruments, then all components are integrated, but the outer diameter of the barrel is enlarged increasing probability of injury to the patient's anus
Solution Approach 1:
The surgical instruments are designed to be inserted through the barrel in a nested configuration, with instruments passing through the hollow interior of the barrel rather than being housed alongside the endoscope within the barrel structure. This nesting approach maintains component integration while minimizing the barrel's outer diameter, thereby reducing injury risk to the patient's anus.
3Device complexity
If the conventional surgical apparatus for TEM is disposed in a barrel together with the endoscope and various surgical instruments, then all components are integrated, but interference between the endoscope and the surgical instruments occurs making it difficult to freely move the surgical instruments
Solution Approach 1:
Surgical instruments are configured to pass through the hollow interior of the barrel in a nested arrangement, allowing them to move freely along their insertion paths without occupying the same spatial volume as the endoscope. This eliminates interference between instruments and the endoscope while maintaining the integrated barrel structure, enabling free movement of surgical instruments during the procedure.
4Adaptability or versatility
If lateral rotation of the surgical apparatus for TEM is needed during the operation, then the operation area can be adjusted, but changes of the patient's posture or separation of the apparatus from the fixing frame is required
Solution Approach 1:
The barrel is designed with a rotatable joint that allows lateral rotation while remaining connected to the fixing frame. This dynamic structure enables the barrel to be rotated to access different operation areas without requiring separation from the fixing frame or changes to patient posture, maintaining apparatus stability while providing rotational adaptability.
Data Source
AI summary
Provided is a surgical apparatus for transanal endoscopic microsurgery (TEM) in which a thin and long endoscope and surgical instruments are inserted through a natural orifice of a human body and the endoscope and surgical instruments are conveyed to the operation area in the body to perform the operation area in the body. According to the surgical apparatus for TEM, a rotation function is added to a barrel of the surgical apparatus for TEM to enable manual rotation of the barrel to a required extent and adjustment of an operation area, without separation of the surgical apparatus for TEM from a fixing frame during an operation. In addition, since the endoscope is disposed outside the barrel, it is possible to reduce the outer diameter of the barrel and uniformly maintain a visual direction of the endoscope even when the barrel is rotated. Further, since the rotation function is added to both the barrel and the surgical instrument insertion hole, more convenient operation is possible.