Constricting Mesh Specimen Retrieval for Smaller Incision Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The limitation of removing large specimens using minimally invasive techniques is the port size, as current methods require extra force or a larger hole due to specimen bunching in retrieval bags, necessitating the need for additional devices.
Innovation Solution
A specimen retrieval device with a contractible tubular mesh or braid structure that constricts to minimize specimen profile, allowing removal through smaller incisions, featuring a proximal and distal opening, a flexible elongated body, and surface protrusions to resist specimen movement, with optional cinching mechanisms for containment and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laparoscopic specimen retrieval bag is used to remove large specimens, then the specimen can be contained, but the specimen bunches at the bottom requiring extra force or a larger hole for extraction
Solution Approach 1:
The retrieval device employs a dynamic mesh structure that transitions from a relaxed state during insertion to a constricted state during extraction. The mesh actively changes its geometric configuration, transforming from an expanded cylinder that accommodates the specimen to a compressed configuration that reduces the specimen profile for removal through smaller ports
Solution Approach 2:
The device changes the physical parameters of the specimen containment system by altering the mesh structure's dimensions. The mesh transitions between expanded and compressed states, changing the effective volume and cross-sectional area of the contained specimen to enable extraction through ports smaller than the original incision
2Object-affected harmful factors
If the port size is reduced for minimally invasive surgery, then patient trauma is minimized, but large specimens cannot be removed
Solution Approach 1:
The mesh structure dynamically adjusts its volume and shape characteristics. During insertion, the mesh is in an expanded state allowing easy passage through small ports. During extraction, the mesh is compressed to reduce the specimen profile, enabling removal of large specimens through small ports while maintaining minimal patient trauma
Solution Approach 2:
The device transforms the three-dimensional specimen volume into a more compact configuration by utilizing the mesh's ability to change dimensions. The specimen is converted from a bulky three-dimensional object to a compressed form that can pass through the two-dimensional plane of the small port
3Productivity
If extra force is applied to extract the specimen from the retrieval bag, then the specimen can be removed, but tissue damage or port disruption may occur
Solution Approach 1:
The device changes the physical state of the specimen containment by compressing the mesh structure. This parameter change reduces the specimen profile and allows extraction through small ports without requiring excessive force, thereby preventing tissue damage and port disruption while maintaining efficient specimen removal
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 efficient removal of surgical specimens through smaller incisions by minimizing specimen profile and preventing slippage, maintaining specimen orientation, and containing body fluids during extraction.
Implementation Method 1
a contractible tubular interwoven mesh or braid structure extending from the proximal opening to the distal opening
Implementation Method 2
a directionally resistant high friction wall capable of reducing slippage of the specimen during removal
Data Source
AI summary
Disclosed is a specimen retrieval device that utilizes a constricting mesh to assist with the contained retrieval of specimens during minimally invasive surgical procedures. The device can facilitate isolation and removal of specimens and allows the specimen to be removed through a smaller incision than a traditional extraction bag through constricting and elongating of the specimen by tension provided from pulling the specimen retrieval device and activating the inner woven fibers. The two-hole opening allows for optimal specimen orientation. In certain aspects the device is configured to disperse pulling tension over a larger area reducing the likelihood of specimen tearing during removal. Large specimens are safely reduced to an easily removable size and shape.