Tissue Isolation Device with Ratchet-Clutch Actuator
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Solution Overview
Problem
Laparoscopic surgery faces challenges in efficiently capturing and removing tissue from body cavities due to limited space and the bulkiness of existing devices, which can lead to contamination and complications if not handled properly.
Innovation Solution
A compact tissue isolation and removal device featuring an elongate shaft with support arms, a containment bag with drawstrings, and a ratchet-clutch actuator system that allows for sequential deployment and closure of the bag to ensure containment and directional orientation of the tissue during extracorporeal removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact tissue isolation and removal device is used, then the device size is reduced and ease of operation is improved, but the containment bag closure reliability may be compromised
Solution Approach 1:
The containment bag closure system is segmented into multiple independent drawstrings (first drawstring for initial closure, second drawstring for final sealing) rather than relying on a single closure mechanism. This segmentation allows each drawstring to perform a specific closure function, maintaining high reliability while keeping the overall device compact and manageable.
2Productivity
If tissue is removed quickly from the body cavity, then productivity is improved, but the risk of contamination increases
Solution Approach 1:
The containment bag is pre-positioned and ready for immediate deployment within the body cavity. The bag is inserted and prepared in advance, with drawstrings positioned for quick activation. When tissue needs removal, the surgeon simply activates the pre-positioned bag, which immediately encloses the tissue, preventing contamination while enabling rapid removal through the trocar.
3Ease of operation
If the containment bag is easily deployable, then ease of operation is improved, but the directional orientation control during extracorporeal removal may be lost
Solution Approach 1:
The support arms are designed to be dynamic rather than fixed - they can be extended or retracted based on the procedural needs. During deployment, the arms extend to provide rigid support and maintain directional orientation when the bag is removed from the body. During insertion, the arms can be retracted to allow easy deployment through the trocar. This dynamic adjustability resolves the contradiction between ease of deployment and orientation control.
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
Enables quick and contamination-free removal of tissue through minimal incision, maintaining directional control and efficiency in the limited space of laparoscopic procedures, reducing the risk of infection and complications.
Implementation Method 1
An actuator is connected to another end of the elongate shaft. The actuator has a trigger connected to a ratchet-clutch to regulate movement of the central core support.
Data Source
AI summary
A tissue isolation and removal device has a containment pouch that is opened and supported by the device. The pouch has two open/close portions both able to be closed and reopened. One portion positioned away from tissue being inserted in the pouch and covering the other portion to enclose or isolate any tissue captured in the other portion.