Contained Tissue Extraction Device with Oscillating Wire Segments
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current morcellation methods and devices face challenges in safely extracting large intracorporeal tissues without disseminating malignant tissue fragments or causing damage to adjacent tissues, and they often hinder postoperative histopathological evaluation due to tissue fragmentation or paste-like consistency.
Innovation Solution
A contained tissue extraction device featuring an impermeable outer bag with an inner bag and wire segments that are oscillated to morcellate tissue within the bag, preventing dissemination and allowing for accurate histopathological evaluation by maintaining tissue integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If electromechanical morcellation devices are used to fragment large intracorporeal tissue, then tissue can be divided into small segments for extraction through small incision, but tissue fragments may disseminate to surrounding organs or intraperitoneal space causing malignancy spread
Solution Approach 1:
The device employs a nested bag structure with an inner bag containing the tissue and an outer bag providing additional containment. The morcellation occurs entirely within the inner bag, which is itself contained within the outer bag. This nested configuration ensures that tissue fragments remain confined during the fragmentation process, preventing dissemination to surrounding organs or intraperitoneal space while still allowing effective morcellation of large tissues through small incisions.
Solution Approach 2:
The impermeable bag acts as an intermediary barrier between the morcellation process and the surrounding body cavity. By containing the tissue within this intermediate structure, the device enables safe fragmentation without direct exposure of tissue fragments to the intraperitoneal space, thus preventing malignancy spread while maintaining the benefits of minimally invasive extraction.
2Productivity
If electromechanical morcellation devices with rotating blades are used, then tissue can be efficiently fragmented, but the tissue is ground into paste-like consistency that hinders histopathological evaluation
Solution Approach 1:
The device replaces the traditional rotating blade mechanical system with an oscillating wire morcellation mechanism. The wire, when oscillated, cuts through tissue by creating clean fractures rather than grinding it down. This substitution maintains high productivity through efficient fragmentation while preserving tissue fragment integrity, allowing adequate samples to be obtained for accurate histopathological evaluation.
Solution Approach 2:
The morcellation process utilizes periodic oscillating motion of the wire rather than continuous rotation. This periodic action creates clean cutting planes through the tissue as the wire moves back and forth, efficiently fragmenting the tissue while maintaining structural integrity of the resulting segments. The oscillating motion prevents the tissue from being ground into paste-like consistency, ensuring suitable specimens for histopathological analysis.
3Object-affected harmful factors
If manual morcellation with scalpel or scissors is performed inside contained bag, then tissue can be segmented without dissemination risk, but the process is time-consuming and labor-intensive
Solution Approach 1:
The oscillating wire morcellation system enables the tissue to be fragmented automatically through the mechanical oscillation of the wire, eliminating the need for manual cutting operations. The wire, when oscillated, self-generates the cutting action through its motion, efficiently segmenting the tissue without requiring manual intervention. This self-service mechanism dramatically reduces the time and labor required compared to manual morcellation while maintaining containment safety.
Solution Approach 2:
The periodic oscillating motion of the wire provides continuous, automated cutting action that efficiently fragments the tissue over time. This rhythmic back-and-forth movement allows the wire to systematically work through the tissue, creating multiple cuts in succession without requiring repositioning or manual intervention between cuts. The result is a time-efficient process that maintains the safety benefits of manual containment while eliminating the labor-intensive nature of manual morcellation.
4Manufacturing precision
If wire segments are oscillated to morcellate tissue, then clean-cut segmentation is achieved for accurate histopathological evaluation, but the device complexity increases with inner bag and outer bag structure
Solution Approach 1:
The device utilizes a nested bag configuration where the inner bag is placed inside the outer bag. This nested structure provides dual containment functionality while maintaining a relatively simple overall design. The inner bag directly contacts the tissue and contains the oscillating wire, while the outer bag provides an additional containment barrier. This nesting approach achieves the required tissue segment quality for histopathology without creating excessive device complexity, as the bags can be manufactured as separate, straightforward components.
Solution Approach 2:
The inner bag serves as an intermediary structure between the oscillating wire and the outer bag. It provides a direct containment environment for the morcellation process while protecting the outer bag from direct contact with the wire and tissue fragments. This intermediary configuration enables clean-cut segmentation for accurate histopathological evaluation while maintaining device simplicity, as each bag layer can be designed and manufactured independently with straightforward functions.
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 morcellates tissues without spreading malignancy or causing damage, enabling safe extraction and accurate histopathological evaluation of large tissue specimens through controlled, clean-cut segmentation.
Implementation Method 1
the wire segments are oscillated back and forth to cut and morcellate the target tissue
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A contained tissue extraction device for morcellating a tissue inside an intracorporeal cavity is disclosed. Particularly, the contained tissue extraction device includes serrated-blade wire segments that are sandwiched between an inner bag and an outer bag. The contained tissue extraction device may capture a target tissue such that a surgeon may pull the contained tissue extraction device taught through an incision that is smaller than the target tissue. The contained tissue extraction device allows a surgeon to morcellate the contained tissue by oscillating wire ends of the wire segments back and forth.