Twist Seal Laparoscopic Disk for Hand-Assisted Surgery
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Solution Overview
Problem
Minimally invasive abdominal surgery techniques, such as Hand Assisted Laparoscopic Surgery (HALS), face challenges in providing adequate access and sealing while minimizing trauma, recovery time, and scarring, as existing laparoscopic disks do not fully address patient and surgeon comfort and performance enhancements.
Innovation Solution
A power-assisted adjustable laparoscopic disk with a tubular diaphragm twist seal and resilient retractor skirt, allowing for controlled opening and closing of the access channel using stored energy, enhancing pneumatic sealing and reducing pneumatic insufflation pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large incision is made to accommodate surgeon's hands and instruments, then access to the body cavity is simplified, but trauma, recovery time, and scarring increase
Solution Approach 1:
The incision is divided into multiple smaller openings instead of one large incision. The laparoscopic disk provides a centralized access point that can be opened when needed, while smaller peripheral openings accommodate instruments. This segmentation reduces trauma and scarring while maintaining surgical access capability.
Solution Approach 2:
The laparoscopic disk is designed as a dynamic structure that can transition between closed and open states. When closed, it provides minimal trauma and scarring. When opened, it allows insertion of the surgeon's hand and instruments. This dynamic capability resolves the contradiction between maintaining small incisions and providing adequate access.
2Reliability
If a laparoscopic disk is used to provide adjustable opening for hand insertion, then pneumatic sealing is achieved, but the device complexity increases
Solution Approach 1:
The laparoscopic disk incorporates a spring mechanism that automatically returns the disk to its closed position after hand insertion. This self-service feature maintains pneumatic sealing without requiring complex active control systems, reducing device complexity while ensuring reliable sealing.
Solution Approach 2:
A spring mechanism acts as an intermediary between the manual opening action and the automatic closing action. This simple mechanical intermediary provides the necessary pneumatic sealing function without requiring complex electronic or pneumatic control systems, thus reducing overall device complexity.
3Ease of operation
If existing laparoscopic disks are used, then access channel is provided, but patient and surgeon comfort and performance are not fully enhanced
Solution Approach 1:
The disk design allows for adjustable opening parameters including the size and position of the access channel. This adjustability enables optimization for different surgical scenarios, enhancing surgeon comfort and performance while maintaining reliable sealing through controlled disk closure.
Solution Approach 2:
The dynamic opening and closing capability of the laparoscopic disk allows the surgeon to insert the hand when needed and automatically seals when withdrawn. This dynamic behavior enhances comfort and performance by providing tactile feedback and maintaining sealing effectiveness without requiring additional active control mechanisms.
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
The solution provides improved patient and surgeon comfort by reducing trauma and recovery time, while maintaining effective sealing and tactile feedback, thus enhancing the performance of HALS procedures.
Implementation Method 1
tubular diaphragm twist seal
Implementation Method 2
resilient retractor skirt
Data Source
AI summary
A laparoscopic device assembly provides a tubular diaphragm twist seal that responds to a slight rotation of an actuating ring in a first direction by coupling a motor spring power assisted rotation of a bottom circumference of the twist seal achieves a pneumatic seal in an adjustable access channel defined by the state of the twist seal for maintaining an insufflated body cavity for a hand assisted laparoscopic surgical procedure. A slight rotation of the actuating ring in an opposite second direction releases compression spring energy and energy in the twisted state of the twist seal so that an upper circumference of the twist seal is allowed to open the adjustable access channel.