Tissue Retrieval Bag with Inflatable Bladder for Secure Containment
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Solution Overview
Problem
Current tissue retrieval devices for endoscopic surgery lack efficient mechanisms for deploying and securing retrieval bags within the body, leading to difficulties in containing and removing tissue samples through small openings or incisions.
Innovation Solution
A tissue retrieval device comprising an introducer tube, actuating rod, and resilient hoop member that deploys a retrieval bag from the introducer tube, with a distal plug and resilient tab mechanism to secure the bag in place, and an optional inflator for bladder inflation to provide structural support for the bag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a retrieval bag is deployed through a small opening or incision, then the patient's recovery time is reduced and surgical trauma is minimized, but the bag may not be securely contained or positioned within the body cavity
Solution Approach 1:
The retrieval bag is nested within the introducer tube during insertion, allowing the bag to be delivered through a small incision while the introducer tube provides protection and guidance. The bag can be collapsed within itself or the introducer tube to facilitate passage through the small opening, then expanded at the target site for secure containment of tissue samples.
Solution Approach 2:
The retrieval bag is constructed from flexible material that can be collapsed into a compact form for insertion through a small incision, then expanded at the surgical site to provide secure containment. The flexible nature of the bag allows it to adapt to the body cavity while maintaining structural integrity for reliable containment.
2Volume of moving object
If a retrieval bag is made large enough to contain tissue samples, then the containment capacity is sufficient, but the bag cannot be inserted through a small opening or incision
Solution Approach 1:
The retrieval bag transitions from a collapsed or compressed state during insertion to an expanded state at the surgical site. This dynamic transformation allows the bag to pass through a small incision in its compact form, then expand to provide sufficient volume for containing tissue samples once positioned within the body cavity.
Solution Approach 2:
The retrieval bag is inserted in a collapsed or nested configuration within the introducer tube, allowing it to pass through a small incision. Once deployed, the bag expands to its full capacity to accommodate tissue samples, effectively nesting the large-volume bag within the small-introduction pathway.
3Productivity
If the retrieval bag is easily deployed, then the surgical procedure time is reduced, but the bag may not be securely positioned or anchored in place
Solution Approach 1:
The retrieval bag incorporates self-deploying features such as self-expanding structures or self-anchoring mechanisms that automatically secure the bag in place upon deployment. This eliminates the need for complex manual positioning or additional anchoring steps, achieving both rapid deployment and secure positioning through the bag's inherent design.
Solution Approach 2:
The retrieval bag is pre-configured with deployment features such as pre-positioned anchors, self-expanding structures, or pre-attached closure mechanisms that automatically activate upon deployment. This preliminary preparation allows the bag to be quickly deployed and securely positioned without requiring time-consuming manual adjustments during the surgical procedure.
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
Enables effective deployment, opening, and secure containment of tissue samples within the retrieval bag, facilitating easy removal through small incisions or ports, reducing the complexity and time required for the surgical procedure.
Implementation Method 1
a tissue retrieval device with bladders
Data Source
AI summary
A tissue retrieval device includes an introducer tube and a tissue retrieval bag. The introducer tube is sized to be inserted into a patient through a trocar. The tissue retrieval bag may be selectively exposed at the distal end of the introducer tube within the patient. The tissue retrieval bag may receive a tissue specimen and be withdrawn from the patient. The tissue retrieval bag may include an inflatable portion. When inflated, the inflatable portion may extend the tissue retrieval bag from a contracted configuration to an expanded configuration. The inflatable portion may substantially seal a tissue specimen within the tissue retrieval bag. The tissue retrieval bag may me formed of an environmentally sensitive material such that the size of the tissue retrieval bag expands when the tissue retrieval bag is exposed within the patient.