Vertebral Bar Connection Assembly with Pivoting Iliac Rod Interface
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Solution Overview
Problem
Existing vertebral osteosynthesis equipment for iliac anchoring of vertebral bars faces challenges in minimizing muscle and tissue mobilization during placement while ensuring adequate resistance to repeated patient movements, with both axial and transverse engagement methods having drawbacks.
Innovation Solution
The equipment features an independent connection assembly with a first connecting part forming a closed conduit for axial engagement on the vertebral bar and a second connecting part with pivoting capacity, allowing reduced tissue mobilization during placement and enhanced resistance through a screwed connection that immobilizes the parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If axial engagement with closed conduit is used, then resistance to repeated forces is improved, but muscle and tissue mobilization increases
Solution Approach 1:
The connection assembly is divided into two independent connecting parts: a first connecting part with a closed conduit for axial engagement on the vertebral bar, and a second connecting part with a passage for transverse engagement on the iliac rod. This segmentation allows each part to perform its specific function optimally - the closed conduit provides strength while the transverse engagement reduces tissue mobilization.
Solution Approach 2:
The first connecting part acts as an intermediary between the vertebral bar and the second connecting part. It provides a closed conduit that engages axially on the vertebral bar, transferring forces while allowing the second connecting part to engage transversely on the iliac rod, thus mediating between the two engagement methods.
2Object-affected harmful factors
If transverse engagement with open structure is used, then muscle and tissue mobilization is reduced, but resistance to repeated forces decreases
Solution Approach 1:
The invention merges the advantages of both axial engagement (strength through closed conduit) and transverse engagement (reduced tissue mobilization) into a single connection assembly. The first connecting part provides axial engagement with closed conduit for strength, while the second connecting part provides transverse engagement for reduced tissue mobilization, combining both benefits.
3Strength
If independent connecting parts with screwed connection are used, then resistance to repeated forces is improved and tissue mobilization is reduced, but device complexity increases
Solution Approach 1:
The connection assembly with two independent connecting parts serves multiple functions: the first connecting part provides axial engagement and force resistance, the second connecting part provides transverse engagement and reduced tissue mobilization, and together they enable adjustable positioning and secure locking through the screwed connection.
Data Source
Figure 1~4
Figure 5~7
AI summary
This equipment comprises an iliac rod (2), a connection assembly (3, 4) for connecting that iliac rod to a vertebral bar, an iliac anchoring member and an iliac part connecting the iliac rod to that iliac anchoring member; said connecting assembly (3, 4) is independent of the iliac rod (2) and comprises two portions, namely: - a first portion (3), for connecting to said vertebral bar (50), that forms a closed conduit (10) for engagement of that portion (3) on that bar (50); and - a second portion (4), for connecting to said iliac rod (2), that forms a conduit (12) for the engagement of that second portion (4) on the iliac rod (2). According to the invention, - said first portion is formed by a first connecting part (3) and said second portion is formed by a second connecting part (4), said first and second connecting parts (3, 4) being independent of one another; said first connecting part (3) comprises a portion (3a) that forms said closed conduit (10) and a threaded rod (3b) protruding from said portion (3a); said second connecting part (4) forms a passage (11 ) through it for the engagement of said threaded rod (3b) of the first connecting part (3), with a pivoting capacity of said second connecting part (4) relative to said first connecting part (3).