Interspinous Vertebral Distractor with Segmented Locking
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Solution Overview
Problem
Existing interspinous vertebral distraction devices are complex, expensive, and suffer from low stability and difficult insertion procedures.
Innovation Solution
A percutaneous interspinous vertebral distractor with a base body designed to fit between spinous processes, featuring expandable locking units and a control mechanism for precise positioning and locking, facilitating easy insertion and high stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile wings with complex locking mechanisms are used, then stability is improved, but device complexity increases and insertion difficulty increases
Solution Approach 1:
The distractor is divided into a base body and separate locking units that can be independently controlled. Each locking unit has its own actuator, allowing independent expansion and locking actions. This segmentation simplifies the overall control mechanism while maintaining stability through modular locking actions.
Solution Approach 2:
The locking units are designed to be dynamically controllable through actuators that enable expansion and contraction. The mobile wings transition from a contracted state during insertion to an expanded locked state for stability, providing dynamic adaptability throughout the procedure.
2Reliability
If expandable locking units are used, then stability is improved, but insertion difficulty increases
Solution Approach 1:
The locking units are designed in a contracted state during insertion to minimize profile and facilitate easy placement between spinous processes. After positioning, they expand to provide stable locking, thus resolving the contradiction between easy insertion and stable fixation.
3Manufacturing precision
If precise positioning mechanisms are used, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The base body includes predefined engagement features and the locking units have corresponding receptacles that guide precise positioning. This segmented design with complementary geometric features achieves accurate positioning without requiring complex active control mechanisms.
Data Source
Figure 1
Figure 2a~7
Figure 2b~2c
AI summary
An interspinous vertebral distractor (1) is provided, which is designed to be placed between two spinous processes and defining a longitudinal axis (1a), a sagittal plane (1b), and a frontal plane (1c); the distractor (1) comprises a base body (2) designed to be placed between the two spinous processes and defining a first end and a second end; an anchoring unit (3) designed to expand attaching the distractor (1) between two spinous processes; an actuator (5) designed to control the passage of the unit (3) between an expanded position and a contracted one; the base body (2) has a sagittal section with two opposing convexities so as to define a profile with two depressions (2a).