Corkscrew Tissue Resecting Device with Integrated Suction
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Solution Overview
Problem
Endoscopic tissue resection procedures face challenges in effectively distending the uterus and efficiently removing tissue debris while maintaining a clear working space, especially during fluid management in procedures like hysteroscopic surgeries.
Innovation Solution
A tissue resecting device with a cork-screw retraction mechanism, where a barb on a rotating cork-screw member engages and withdraws tissue through a window with a proximal cutting edge, aided by a motor and fluid management system for negative pressure to facilitate tissue excision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional resection device is used, then tissue can be removed, but the working space becomes obscured by tissue debris and fluid management becomes difficult
Solution Approach 1:
The patent combines the tissue resection function with the debris removal function into a single integrated device. The resection device includes a cutting element and a suction channel that work together to simultaneously cut tissue and remove debris through the same device, maintaining a clear working space without requiring separate instruments
Solution Approach 2:
The patent introduces fluid as an intermediary medium that serves multiple functions: it distends the uterus to create working space, facilitates tissue resection, and carries debris away through the suction channel. The fluid management system acts as a mediator between tissue removal and debris clearance
2Illumination intensity
If the uterus is distended with fluid to maintain working space, then visibility is improved, but fluid management complexity increases
Solution Approach 1:
The resection device is designed with multi-functionality, serving both as a cutting instrument and a suction device. The same device that resects tissue also manages fluid and removes debris, reducing the need for separate fluid management instruments and simplifying the overall system
Solution Approach 2:
The patent merges the cutting function and suction function into a single integrated tool. The resection device includes both a cutting element for tissue removal and an integrated suction channel for fluid and debris management, reducing device complexity while maintaining visibility
3Productivity
If tissue is removed in large quantities, then resection effectiveness is improved, but debris clearance becomes more difficult
Solution Approach 1:
The patent enables continuous tissue resection and continuous debris removal through the integrated suction channel. As the cutting element removes tissue, the suction system simultaneously and continuously draws debris away through the same device, maintaining constant productivity without interruption for debris clearance
Solution Approach 2:
The resection and debris removal functions are combined in a single device with the cutting element and suction channel working in unison. This integration allows large quantities of tissue to be removed while debris is continuously cleared through the same instrument, maintaining high productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively pierces, retains, and excises tissue, maintaining a clear surgical site by using the cork-screw mechanism and fluid management to ensure efficient tissue removal and debris clearance during endoscopic procedures.
Implementation Method 1
The cork-screw member includes a barb at a distal end thereof configured to pierce and retain tissue thereon. Upon rotation of the inner shaft, the barb pierces and retains tissue thereon and withdraws tissue proximally along the cork-screw member
Implementation Method 2
excess tissue is excised by the proximal cutting edge of the window as the tissue is withdrawn through the elongated outer shaft
Implementation Method 3
outflow tubing is adapted to connect to a fluid management system configured to provide negative pressure to the elongated outer shaft to draw tissue into the window and through the elongated outer shaft
Data Source
AI summary
A tissue resecting device includes a housing having an outer shaft, the outer shaft including a tool portion disposed at a distal end thereof having a window defined therein with a proximal cutting edge. An inner shaft is disposed within the outer shaft and includes proximal and distal ends, the inner shaft configured to rotate upon actuation thereof. A cork-screw member extends distally from the distal end of the inner shaft and into the window. The cork-screw member is configured to rotate concomitantly with the inner shaft and includes a barb at a distal end thereof configured to pierce and retain tissue thereon. Upon rotation of the inner shaft, the barb pierces and retains tissue and withdraws tissue proximally along the cork-screw member and into the outer shaft and wherein excess tissue is excised by the proximal cutting edge of the window as the tissue is withdrawn through the outer shaft.