Containment Bag for Minimally Invasive Tissue Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Minimally-invasive surgical procedures face challenges in removing large tissue specimens from internal body cavities due to restricted access, which often requires breaking down specimens to facilitate removal, increasing the risk of cancer cell seeding and complicating the process within an enclosed environment.
Innovation Solution
A system comprising an access cannula, a deployment cannula, and a containment bag is used to deploy the bag into the pelvic cavity, allowing for the enclosure and breakdown of large tissue specimens into smaller pieces within the cavity, enabling their removal while maintaining the specimen in an enclosed environment to prevent cancer cell seeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If large tissue specimens are broken down into smaller pieces for removal through minimally-invasive openings, then the ease of removal is improved, but the risk of cancer cell seeding increases
Solution Approach 1:
The containment bag is inserted through the minimally-invasive opening and deployed within the body cavity. The bag encapsulates the entire tissue specimen during the breakdown process, allowing morcellation to occur in a contained environment. This nesting approach enables easy removal of the bag with fragmented tissue while preventing cancer cells from seeding into the surrounding tissue during the fragmentation process.
Solution Approach 2:
The containment bag serves as an intermediary between the tissue specimen and the body cavity environment. It provides a barrier that allows the specimen to be broken down into removable pieces while isolating the process from direct contact with surrounding tissues, thereby eliminating cancer cell seeding risk while maintaining ease of removal.
2Object-affected harmful factors
If a containment bag is deployed into the body cavity to enclose and break down tissue specimens, then the risk of cancer cell seeding is reduced, but the device complexity increases
Solution Approach 1:
The containment bag system employs a nested structure where the bag is stored within a deployment catheter that is inserted through a minimally-invasive opening. The bag deploys from the catheter into the body cavity, creating a contained environment for specimen breakdown. This nested design reduces device complexity by integrating multiple functions into a compact, hierarchical structure.
Solution Approach 2:
The device is segmented into distinct functional components: the containment bag, the deployment catheter, and the access needle. This segmentation allows each component to be optimized independently and simplifies the overall system by breaking down the complex deployment mechanism into manageable, modular parts that can be manufactured and assembled separately.
3Object-affected harmful factors
If minimally-invasive openings are used for tissue removal, then the invasiveness of the procedure is reduced, but the maneuverability and visualization are restricted
Solution Approach 1:
The containment bag is inserted through a small-gauge access needle, demonstrating the nested principle. The bag deploys from within the needle into the body cavity, allowing the system to access deep cavities through minimal incisions. This nested approach maintains low invasiveness while providing sufficient maneuverability for specimen containment and breakdown within the cavity.
Solution Approach 2:
The containment bag transitions from a one-dimensional linear insertion through the needle to a three-dimensional expanded structure within the body cavity. This dimensional change allows the bag to provide full maneuverability and containment capacity within the cavity while maintaining minimal invasiveness during insertion through the small opening.
Data Source
AI summary
A system for removal of a tissue specimen from an internal body cavity includes a cannula arrangement having an access cannula including a first elongated tubular member, a deployment cannula including a second elongated tubular member configured for insertion into the first lumen, a deployment plunger including a proximal base and a plurality of engagement arms extending distally from the proximal base, and an inner cannula including a third elongated tubular member. The system further includes a containment bag selectively deployable from the cannula arrangement. Distal advancement of the deployment cannula relative to the access cannula deploys a first portion of the containment bag from the cannula arrangement, and distal advancement of the deployment plunger relative to the deployment cannula and the access cannula deploys a second portion of the containment bag from the cannula arrangement.