Tissue Access Closure System with Suture Guide and Passer
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Solution Overview
Problem
Conventional methods for closing trocar access portals in laparoscopic surgical procedures are difficult to perform, time-consuming, and do not provide a simple, reproducible, and reliable means of closure, often leading to complications such as trocar-site hernias due to inadequate closure techniques and the use of non-endogenous materials that can cause adverse reactions.
Innovation Solution
The development of a tissue access and closure system comprising a cannula sub-system, suture guide sub-system, tissue positioning sub-system, and suture passer sub-system that allows for precise tissue access and closure of laparoscopic ports or incisions, facilitating effective approximation, ligation, and fixation of biological tissue using a combination of cannula, suture guide, and suture passer components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional trocar access portal closing methods are used, then closure of the portal is achieved, but the procedure is difficult to perform and time-consuming
Solution Approach 1:
The tissue approximation device enables self-service closure by allowing the surgeon to approximate the trocar access portal using only one hand, without requiring assistance from another surgeon or complex manual manipulation. The device's mechanical structure automatically guides the suture through the tissue layers and secures the closure with minimal surgical intervention.
Solution Approach 2:
The tissue approximation device acts as an intermediary tool between the surgeon and the tissue, providing a mechanical advantage system that translates simple surgical movements into effective tissue approximation. The device includes intermediate components such as the suture guide, S-shaped wire, and locking mechanism that facilitate the closure process without requiring direct manual manipulation of the tissue.
2Reliability
If conventional closing methods are used, then portal closure is attempted, but the procedure requires considerable time to execute
Solution Approach 1:
The device performs preliminary actions by pre-configuring the suture path and tensioning mechanism before final closure. The S-shaped wire is pre-formed to guide the suture through the necessary tissue layers, and the locking mechanism is pre-positioned to secure the closure once achieved, eliminating the need for time-consuming manual suture manipulation and knot-tying during the procedure.
Solution Approach 2:
The invention replaces complex manual mechanical manipulation with a simplified mechanical system. Instead of requiring the surgeon to manually pass sutures through tissue layers and tie knots, the device uses a pre-configured S-shaped wire and locking mechanism that automatically secures the tissue approximation with minimal surgical movement, significantly reducing the time required for closure.
3Reliability
If conventional closing methods are used, then closure is attempted, but the method does not provide a simple, reproducible, and reliable means of closing
Solution Approach 1:
The tissue approximation device is segmented into distinct functional components: the suture guide, the S-shaped wire, the locking mechanism, and the tissue engagement elements. Each component performs a specific function in the closure sequence, making the overall process more reproducible and reliable. The segmentation allows for standardized manufacturing and consistent performance across multiple procedures.
Solution Approach 2:
The device is designed with universal applicability to close trocar access portals of various sizes and locations. The S-shaped wire configuration and locking mechanism can accommodate different tissue thicknesses and portal dimensions, providing a reproducible closure method across diverse surgical scenarios without requiring multiple specialized tools or techniques.
4Reliability
If non-endogenous materials are used for closure, then portal closure is achieved, but adverse reactions occur
Solution Approach 1:
The device uses homogenous, endogenous materials throughout its construction, particularly the S-shaped wire and suture components, which are made from biocompatible metals or polymers that match the mechanical properties of human tissue. This homogeneity reduces the risk of adverse immune reactions and promotes better tissue integration and healing outcomes.
Solution Approach 2:
The device employs composite material construction combining biocompatible metal components (for the S-shaped wire and structural elements) with biocompatible polymer components (for the suture and tissue engagement elements). This composite approach optimizes both the mechanical strength required for reliable closure and the biocompatibility needed to minimize adverse reactions.
Data Source
AI summary
A system for piercing through biological tissue and providing access to internal structures; particularly, intra-abdominal structures, and closing an opening in the tissue. The system includes a suture guide sub-system having a tissue positioning sub-system for engaging segments of tissue disposed proximate the tissue opening and a suture passer sub-system that slideably engages the suture guide sub-system. The suture passer sub-system includes suture deployment and capture means that is configured to removably secure a suture thereto and deliver the suture to the segments of tissue disposed proximate the tissue opening.