Elongated Tissue Retrieval Bag Nested in Introducer
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Solution Overview
Problem
Laparoscopic surgery faces challenges in efficiently retrieving tissue from body cavities due to limited access and the need for minimal invasiveness, with existing devices being bulky and inefficient, particularly when dealing with infected or cancerous tissues that pose infection risks if not contained properly.
Innovation Solution
A tissue retrieval system comprising an elongate introducer, a tissue retrieval bag with an elongate profile, and an actuator that deploys from a stowed position within the introducer to an open position, allowing for containment and removal of tissue through a small incision, with features like hybrid material properties and reinforced sections to enhance strength and compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a single laparoscopic port with small size is used to reduce invasiveness, then patient invasiveness is reduced, but tissue retrieval efficiency deteriorates due to limited access
Solution Approach 1:
The tissue retrieval bag is nested within the introducer device, allowing the bag to be delivered through a small trocar and then deployed within the body cavity. This nesting approach enables access through minimal incisions while providing sufficient retrieval capacity once deployed.
Solution Approach 2:
The retrieval bag transitions from a compact one-dimensional rolled or folded state during delivery to a three-dimensional expanded state within the body cavity. This dimensional transformation allows the device to pass through small access ports while providing large retrieval volume at the surgical site.
2Reliability
If existing retrieval devices are used, then tissue containment is achieved, but device complexity and bulkiness increase
Solution Approach 1:
The introducer and retrieval bag are combined into a single integrated device. The bag is delivered pre-loaded within the introducer, eliminating the need for separate delivery mechanisms and reducing overall device complexity while maintaining reliable containment.
Solution Approach 2:
The retrieval bag is constructed from flexible thin-film material that can be rolled or folded into a compact configuration for delivery through small trocars, then expanded to provide adequate containment volume. This flexible film approach reduces device bulkiness while maintaining containment reliability.
3Object-affected harmful factors
If minimal disturbance to surgical site is desired, then infection risk is reduced, but tissue retrieval difficulty increases
Solution Approach 1:
The retrieval bag is pre-positioned within the introducer and deployed at the surgical site before tissue manipulation begins. This preliminary placement ensures immediate containment capability, minimizing disturbance to the surgical site and reducing infection risk while facilitating easy tissue retrieval.
Solution Approach 2:
The retrieval bag acts as an intermediary between the surgical site and the external environment. Tissue is captured within the sealed bag, allowing manipulation and removal without direct exposure of the surgical site to external contaminants, thereby reducing infection risk while maintaining ease of operation.
Data Source
AI summary
A tissue retrieval system can include a tissue retrieval bag with an elongate profile. The tissue retrieval bag can have a relatively large volume, but be rollable to a stowed configuration to fit in a relatively small diameter introducer. The tissue retrieval system can include one or more support arms coupled to the tissue retrieval bag, the support arms biased to position the tissue retrieval bag in an access position once deployed from the introducer. A tissue retrieval system can have a hybrid tissue retrieval bag including material properties that vary along the depth of the bag from an open end to a closed end. A tissue retrieval bag can be used in conjunction with an introducer, or as a stand alone tissue retrieval bag.