Rotary Lacing System for Surgical Boot Limb Immobilization
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Solution Overview
Problem
Current surgical support apparatuses lack effective mechanisms to securely restrain patient limbs during procedures, leading to potential movement and instability.
Innovation Solution
A surgical support apparatus featuring a surgical boot or arm sheath with a rotary lacing system and strap mechanism that applies clamping forces to immobilize the limb, utilizing a rotary tightening mechanism and cable guides to secure the tongue to the shell, and a secondary strap mechanism for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surgical support apparatus uses a simple structure without a tightening mechanism, then the device complexity is reduced, but the limb cannot be securely restrained leading to movement and instability during procedures
Solution Approach 1:
The surgical boot incorporates an adjustable tightening mechanism that allows the restraint force to be dynamically modified during the surgical procedure. The mechanism includes a tightening member with engagement features that can be adjusted to different positions, enabling the clinician to optimize the clamping force on the limb as needed during different stages of the procedure.
Solution Approach 2:
The tightening mechanism is divided into discrete functional components including a tightening member, engagement features, and a ratchet mechanism. This segmentation allows each component to perform its specific function independently while contributing to the overall restraint system, making the complex mechanism more manageable and reliable.
2Reliability
If the surgical boot includes an adjustable tightening mechanism to secure the limb, then the limb restraint stability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The ratchet mechanism provides automatic one-way locking of the tightening member at the desired tension level. Once the clinician adjusts the tightening member to the appropriate position, the ratchet mechanism automatically engages to maintain that tension without requiring continuous adjustment or additional components to hold the position, thereby reducing overall system complexity.
Solution Approach 2:
The engagement features act as an intermediary between the tightening member and the boot structure, transferring the tightening force efficiently. These engagement features include protrusions and recesses that interface the tightening member with the boot, simplifying the connection mechanism while ensuring reliable force transmission.
Data Source
AI summary
A surgical support apparatus comprising a surgical boot sized to receive a portion of a limb of a patient therein and a tightening device positioned between a first end and a second end of the surgical boot. The tightening device is configured to apply a clamping force to the portion of the limb of the patient positioned in the surgical boot.