Tissue Retrieval Bag with Porthole and Pleated Design
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Solution Overview
Problem
Current tissue retrieval devices require multiple instruments and modalities, and lack efficient methods for morcellation within the retrieval bag, posing risks such as cancer cell spread during tissue removal in laparoscopic surgeries.
Innovation Solution
A stand-alone tissue retrieval bag with a foldable design that can be deployed and collapsed using a single motion, featuring a pleat for actuation, a channel for external access, and a porthole for secondary access, allowing minimal hardware usage and easy manipulation within the body cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional tissue retrieval device with attached bag is used, then tissue can be retrieved, but multiple instruments and complex procedures are required, increasing device complexity and operational difficulty
Solution Approach 1:
The bag is designed as a stand-alone unit that can be deployed independently without requiring attachment to other surgical instruments. The foldable structure with pleats allows the bag to be collapsed into a compact form that can be inserted through a trocar, and then deployed inside the body cavity using minimal external manipulation, thereby merging the bag functionality into a self-contained system.
Solution Approach 2:
The stand-alone bag design can be used across different surgical modalities (laparoscopic, natural orifice, and open surgery) without requiring instrument-specific adaptations. The universal design eliminates the need for modality-specific retrieval devices, reducing the overall number of specialized instruments needed in the surgical toolkit.
2Object-affected harmful factors
If morcellation is performed outside the retrieval bag, then tissue can be divided, but cancer cells may spread in the abdominal cavity
Solution Approach 1:
The retrieval bag serves as an intermediary containment structure that isolates the morcellation process from the abdominal cavity. By performing tissue division inside the bag, cancer cells are contained within the bag boundaries rather than being released into the peritoneal space. The bag acts as a protective barrier that mediates between the morcellation action and the surrounding biological environment.
Solution Approach 2:
The bag design allows for effective morcellation through controlled segmentation of tissue samples. The pleated structure and internal geometry of the bag facilitate the division of tissue into smaller segments that can be efficiently packed into the bag for removal, while maintaining containment throughout the process.
3Ease of operation
If the bag requires puncturing for access, then external instruments can reach inside, but the bag integrity is compromised and trauma risk increases
Solution Approach 1:
The bag incorporates a porthole that provides a secondary access point through the lateral wall rather than requiring puncture from the distal end. This dimensional change in access approach allows instruments to enter the bag through a pre-formed opening in the bag wall, eliminating the need to puncture the bag and thereby preserving bag integrity while still enabling internal manipulation.
Solution Approach 2:
The bag design includes self-contained features such as the porthole and pleated structure that enable manipulation and access without external puncturing. The bag essentially serves itself by providing built-in access mechanisms that eliminate the need for damaging modifications during the surgical procedure.
4Productivity
If a foldable bag design is used, then deployment is simplified with single motion, but the bag structure becomes more complex to manufacture
Solution Approach 1:
The bag incorporates dynamic pleated folds that allow the structure to transition from a compact collapsed state to an expanded deployed state. These dynamic elements enable the bag to adapt its shape and volume based on operational requirements, facilitating rapid deployment through simple motion while the folded structure itself remains relatively simple to manufacture using standard fabrication techniques.
Data Source
AI summary
Provided is a tissue retrieval bag. The bag is defined by a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and a channel formed into the exterior surface of the bag, wherein the channel provides access to the interior of the bag through the exterior surface. Also provided is a tissue retrieval defined by a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and at least one porthole on the exterior of the bag, wherein at least one tube extends from the at least one porthole.