Adjustable Finger Tendon Sheath Brace for Stable Compression
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Solution Overview
Problem
Conventional finger tendon sheath braces are complex, inconvenient to wear, and unable to adjust pressure consistently, which hampers tendon sheath healing by allowing pressure fluctuations and potential tissue compression.
Innovation Solution
A finger tendon sheath brace with an adjustable pressure mechanism, including a compression screw, spring, and push rods, allows for customizable pressure adjustment and includes a transparent display to monitor pressure levels, ensuring stable skin surface pressure and preventing tissue necrosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional plaster fixation is used, then the tendon sheath can be initially stabilized, but the structure is complex and inconvenient to wear, and cannot adjust pressure consistently
Solution Approach 1:
The brace is divided into multiple functional components: a fixing plate for stabilization, a compression screw for pressure adjustment, a push rod for force transmission, and a spring for pressure regulation. Each component performs a specific function, allowing the system to achieve reliable tendon sheath stabilization while maintaining ease of adjustment and wearability through modular design.
2Reliability
If fixed compression pressure is applied to stabilize the tendon sheath, then healing can be promoted, but pressure fluctuations and excessive compression occur, causing tissue necrosis and blocking blood circulation
Solution Approach 1:
The compression pressure is made dynamically adjustable through the compression screw mechanism, which allows the user to precisely control and maintain optimal pressure levels. The spring component provides dynamic pressure regulation, ensuring that the compression force remains within the safe range of 30-100 mmHg and automatically compensates for pressure fluctuations during finger movement, thereby preventing tissue necrosis while maintaining tendon sheath stability.
Solution Approach 2:
The spring mechanism acts as a feedback element that automatically adjusts the compression pressure based on the position and movement of the finger. When the finger moves or swells, the spring compresses or expands to maintain consistent pressure, preventing both excessive compression that would cause necrosis and insufficient compression that would allow displacement.
3Reliability
If the compression pressure is increased to prevent displacement, then tendon sheath stability improves, but blood and lymph reflux is blocked, causing local blood circulation disorder
Solution Approach 1:
The compression pressure parameter is precisely controlled within the physiological range of 30-100 mmHg through the adjustable compression screw and spring mechanism. This parameter optimization ensures sufficient compression to prevent tendon sheath displacement while remaining below the threshold that would block blood and lymph circulation, thereby eliminating the harmful effect of circulation disorder.
4Ease of operation
If the brace structure is simplified for ease of wear, then comfort and usability improve, but the ability to adjust and maintain constant pressure is lost
Solution Approach 1:
The spring mechanism provides self-regulating pressure maintenance without requiring continuous external adjustment. Once the compression screw is set to the desired pressure level, the spring automatically compensates for pressure changes caused by finger movement or swelling, maintaining constant compression pressure throughout the healing process and eliminating the need for frequent manual adjustments.
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 brace effectively stabilizes tendon sheath pressure, accelerates healing, prevents tissue compression, and enhances comfort and usability, while maintaining a normal physiological environment for the tendon.
Implementation Method 1
a spring arranged in the compression screw and used for adjusting a pressure applied on the compression plate by the compression screw
Data Source
AI summary
Provided is a finger tendon sheath brace capable of adjusting fixing pressure, including a brace fixing plate, a compression screw, a compression plate, an adjustable pressure push rod and a spring. The brace fixing plate is configured as a fixing structure for accommodating a finger to extend in the finger tendon sheath brace, and is provided with a threaded opening in a center of the brace fixing plate in a vertical direction perpendicular to the finger. The compression screw is embedded in the threaded opening of the brace fixing plate through threads to make an end of the compression screw slightly higher than the brace fixing plate and a head end of the compression screw pass through the brace fixing plate and enter a cavity for accommodating the finger. The compression plate is connected with a head end of an adjustable pressure push rod inner sleeve.