Tissue Extraction Bag With Offset Cutters for Contained Removal
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Solution Overview
Problem
Conventional tissue extraction devices, such as laparoscopic morcellators, are inefficient, require prolonged operating times, and pose risks of unintended injuries and the spread of occult malignancy, worsening patient prognosis.
Innovation Solution
A tissue extraction device with a bag and cutters, featuring a detachable section, rolling ring, and frame with cutters extending through the bag interior, allowing for controlled tissue cutting and extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sharp spinning blades are used for tissue cutting, then cutting function is achieved, but operating time is prolonged and efficiency is reduced
Solution Approach 1:
The tissue extraction device divides the cutting function into multiple independent cutters (first cutter, second cutter, third cutter) that can simultaneously cut different portions of the tissue specimen. This segmentation of the cutting task allows parallel processing, significantly reducing the time required compared to a single blade approach.
Solution Approach 2:
The device performs preliminary positioning and securing of the tissue specimen within the bag before cutting begins. The tissue is firmly held and positioned in advance, allowing the multiple cutters to immediately begin efficient cutting without delay for repositioning or securing during the cutting process.
2Productivity
If conventional laparoscopic morcellators are used, then tissue extraction is performed, but risk of unintended injuries and malignancy spread increases
Solution Approach 1:
A bag serves as an intermediary barrier between the cutters and the surrounding surgical field. The tissue specimen is placed inside the bag, which contains the cutting action and prevents direct contact between the cutters and adjacent tissues or organs. This intermediary structure eliminates the risk of unintended injuries and contains any potential malignancy cells within the bag during extraction.
Solution Approach 2:
The extraction process is segmented into distinct phases: securing the tissue in the bag, cutting the tissue into portions, and extracting the portions through the incision. This segmentation allows controlled containment of the tissue throughout the process, preventing spread of occult malignancy while maintaining extraction capability.
3Productivity
If multiple cutters are used for tissue cutting, then cutting efficiency is improved, but device complexity increases
Solution Approach 1:
The device uses a single actuator mechanism that performs multiple functions: it advances all three cutters simultaneously, controls their reciprocating motion, and coordinates their cutting action. This multi-functional actuator reduces the number of separate control systems needed, managing the complexity while maintaining high cutting efficiency through coordinated multi-cutter operation.
Data Source
AI summary
In accordance with an aspect of the present disclosure, a tissue extraction device may include a bag having an interior and a plurality of cutters elements extending along an interior surface of the bag. The cutters can be offset to facilitate collapsing of the bag prior to introducing the bag into a patient.