Circular Arc Guide Rail Hip Traction Device

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Solution Overview

Problem

Current leg-holding traction devices for hip operations require frequent readjustment of mechanical tension, are cumbersome to operate, and limit the range of leg movement, leading to longer surgery times, especially when used by inexperienced personnel.

Innovation Solution

A leg-holding traction device with a circular arc guide rail that rotates about a perpendicular axis, featuring a longitudinally adjustable piston-like component supported by a bushing, allowing for smooth adjustment and secure fixation, along with a foot securing device and adjustable rollers for stability, enabling precise control and reduced operator effort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional leg-holding traction devices are used, then leg position can be controlled, but frequent readjustment of mechanical tension is required and operation time increases

Engineering Contradiction:

Improveease of leg position adjustmentVSAvoidoperation duration

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent implements a dynamic leg-holding traction device with a circular arc guide rail that allows continuous adjustment of leg position. The rail rotates about a turning axis perpendicular to the guide, enabling smooth transitions between different leg positions without frequent readjustment of mechanical tension, thus reducing operation time while maintaining ease of operation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device pre-configures the leg-holding traction system with a circular arc guide rail that anticipates the required leg positions during surgery. The longitudinal adjustability of the piston-like component allows the system to be pre-positioned, reducing the need for frequent readjustment during the procedure

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If traditional devices are used, then leg movement can be restricted, but the range of leg movement is limited and excessive tissue stress occurs

Engineering Contradiction:

Improverange of leg movementVSAvoidtissue stress

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a circular arc guide rail that follows a curved path, allowing the leg to move through a natural arc motion. This curvature enables a wider range of leg movement while distributing mechanical stress more evenly along the movement path, preventing excessive localized tissue stress that occurs with straight-line restriction devices

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Adaptability or versatility

If fixed trauma beds are used, then leg positioning is possible, but frequent acquisition of new devices is required and cost increases

Engineering Contradiction:

Improvedevice versatilityVSAvoiddevice acquisition cost

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs a universal leg-holding traction device with a circular arc guide rail that can accommodate various leg positioning requirements through a single mechanism. The longitudinal adjustability of the piston-like component and the rotatability of the rail about the turning axis enable one device to replace multiple fixed trauma beds, reducing acquisition costs while maintaining high versatility

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS7762975B2Device for guiding the leg during a hip operation, particularly during an endoprosthesis implantation

Publication Date: 2010.07.27 INNOVATIVE ORTHOPEDIC TECHNOLOGIES LLC

AI summary

Leg-holding traction device (57), especially for hip operations, comprising a rail (31), that contains a circular arc-shaped guide, and is rotatable about a turning axis (71) running perpendicular to the circular arc-shaped guide, and a leg holder (75) that is adjustably supported on the rail (31).