Collapsible Tissue Extraction Bag for Minimally Invasive Morcellation
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Solution Overview
Problem
Existing medical procedures for removing tissue specimens or organs through small incisions or natural openings often result in the dispersion of unwanted tissue cells or biological material into the peritoneal cavity, posing risks, especially if the tissue is cancerous.
Innovation Solution
A tissue specimen or organ isolating device comprising a flexible bag-like structure with a semi-flexible ring-like member that collapses for insertion and automatically opens within the body, allowing for the collection and removal of the specimen without the need for power morcellators, thereby minimizing the dispersion of biological material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a power morcellator is used to reduce tissue specimen size, then the tissue can be removed through a small incision, but biological material is dispersed into the peritoneal cavity
Solution Approach 1:
The device places a collapsible bag inside the patient's body through a small incision, then expands it to contain the tissue specimen for morcellation. The bag acts as an inner container nested within the body cavity, allowing size reduction while preventing biological material dispersion.
Solution Approach 2:
The collapsible bag serves as an intermediary containment structure between the morcellation process and the peritoneal cavity. It mediates the tissue reduction process by providing a controlled environment that prevents harmful biological material from escaping into the body cavity.
2Object-generated harmful factors
If a large tissue specimen is removed through a small incision without size reduction, then no biological material is dispersed, but the specimen cannot be extracted
Solution Approach 1:
The collapsible bag is inserted in a compressed state through the small incision, then expanded within the body cavity to accommodate the large tissue specimen. After morcellation, the bag is collapsed again to contain the reduced tissue pieces for extraction through the same small incision.
Solution Approach 2:
The bag transitions between different states: collapsed for insertion, expanded for containment and morcellation, and collapsed again for extraction. This dynamic state change enables the bag to perform multiple functions through a single small incision.
3Ease of operation
If a traditional incision is used to remove the tissue specimen, then extraction is easy, but scarring and infection risk increase
Solution Approach 1:
The device separates the extraction function from the containment function. The collapsible bag is inserted through a small incision, and the tissue specimen is morcellated into smaller pieces that can be extracted through the same small opening, eliminating the need for a large incision.
Solution Approach 2:
The collapsible bag is made of flexible material that can be compressed for insertion through a small incision, then expanded to contain the tissue specimen. This flexible shell structure enables minimally invasive access while providing adequate containment space.
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 contains and removes tissue specimens or organs through small incisions, reducing the risk of dispersing cancerous cells or other biological material into the body cavity, facilitating safe and efficient minimally invasive procedures.
Implementation Method 1
The mouth is formed of a semi-flexible ring-like member that is collapsible by squeezing it to close the mouth
Data Source
AI summary
A system and method for facilitating the removal of a tissue specimen from a patient is disclosed. The system includes a bag or pouch, a tissue cutter device, a support and a stabilizer. The tissue cutter device includes a passer, a wire, and a handle. The support is an elongated member. The passer is an elongated member configured to be coupled to the support and introduced as a temporary unit into the mouth of the bag or pouch in the patient's body holding the tissue specimen. The wire is attached to the passer. The temporary unit is configured to pass around the tissue specimen and out of the opening in the bag or pouch to carry the wire through that path so that a distal portion of the wire and a proximal portion of the wire are outside the patient's body. Those portions of the wire can be pulled to cut into the tissue specimen. The stabilizer holds the tissue specimen as the wire cuts into it.