Adjustable Mesh Basket Opening for Endoscopic Stone Size Measurement
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Solution Overview
Problem
The size of stones cannot be directly judged during stone extraction surgery using existing stone extraction mesh baskets, leading to potential failure in passing the stones through the guide sheath and instrument damage.
Innovation Solution
A mesh basket device equipped with a mode switching device, opening size adjustment, and adjusting amount measurement, allowing for size determination by comparing the mesh basket's opening size with the stones under endoscopic magnification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the endoscope is used to extract stones, then the stones can be removed through the guide sheath, but the size of the stones cannot be directly judged on the display due to magnification
Solution Approach 1:
The patent introduces a mesh basket with a known, adjustable opening size as an intermediary reference object. By adjusting the mesh basket's opening size to match the stone size and comparing the visual appearance under endoscopic magnification, surgeons can indirectly determine the actual stone size without needing direct measurement capability through the endoscope.
Solution Approach 2:
The mesh basket's opening size is made adjustable through a control mechanism that allows changing the basket's dimensions. This parameter change enables the basket to be configured at different sizes, providing a variable reference standard that can be matched against the stone size to determine measurement information.
2Measurement precision
If the mesh basket opening size is fixed, then the structure is simple, but the stone size cannot be determined accurately under endoscopic magnification
Solution Approach 1:
The mesh basket's opening size is transformed from a fixed parameter to a dynamic, adjustable parameter. The control mechanism enables real-time modification of the basket's dimensions during the surgical procedure, allowing adaptation to different stone sizes while maintaining a relatively simple overall structure.
3Adaptability or versatility
If the mesh basket opening size is adjustable, then the stone size can be determined, but the device complexity increases
Solution Approach 1:
The mesh basket is designed to serve multiple functions: it acts as both a retrieval device for removing stones and as a measurement reference tool. The adjustable opening size feature enables it to function as a sizing guide, eliminating the need for separate measurement instruments and justifying the added complexity through multi-functionality.
Data Source
AI summary
A mesh basket device capable of measuring the size of stones includes: a mesh basket, a push rod, a mode switching device, an opening size adjustment device, and an adjusting amount measuring device. The push rod is configured to drive the mesh basket to move. The mode switching device is used to switch between a measurement mode and a stone extraction mode. In the stone extraction mode, the opening size of the mesh basket remains unchanged during the movement of the mesh basket. The opening size adjustment device is connected to the mesh basket. In the measurement mode, the opening size adjustment device is configured to adjust the opening size of the mesh basket during the movement. The adjusting amount measuring device is configured to measure the adjusting amount of the opening size adjustment device, which is in a corresponding relationship with the opening size of the mesh basket.