Spinal Instrument Modular Sleeve Assembly for Bone Fastener Alignment
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Solution Overview
Problem
Current spinal implant systems face challenges in efficiently delivering and positioning bone fasteners during surgical procedures for musculoskeletal disorders, particularly in providing stable alignment and support for vertebral members while minimizing tissue disruption and maximizing precision.
Innovation Solution
A surgical instrument comprising an outer and inner sleeve assembly with a detachable inner assembly that allows for guided screw insertion and disengagement, enabling precise alignment and stabilization of bone fasteners, and compatibility with robotic systems for enhanced precision and minimally invasive techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachable inner assembly is used in the surgical instrument, then the ease of operation and instrument reuse are improved, but the device complexity increases
Solution Approach 1:
The surgical instrument is divided into separate components: an outer assembly and a detachable inner assembly. The inner assembly can be removed from the outer assembly after use, allowing the outer assembly to be reused for subsequent procedures. This segmentation improves ease of operation and instrument reuse while managing device complexity through modular design.
2Reliability
If precise alignment and stabilization of bone fasteners is achieved, then the reliability of spinal implant is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The surgical instrument serves as an intermediary tool that provides precise alignment and stabilization of bone fasteners during insertion. The instrument's structured design with guides and support mechanisms ensures accurate positioning, improving reliability while managing the complexity of detection and measurement through mechanical guidance.
3Object-affected harmful factors
If minimally invasive techniques are employed, then the object-affected harmful factors are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The surgical system employs minimally invasive techniques by delivering implants through small incisions using segmented, modular instruments. The detachable inner assembly and outer assembly allow for precise delivery through minimal tissue disruption, reducing harmful effects on the patient while requiring high manufacturing precision for the instrument components and implants.
Data Source
AI summary
An instrument includes an outer sleeve and an inner sleeve positioned in the outer sleeve. The inner sleeve defines a cavity. The shaft extends through the inner sleeve and includes a drive. A latch is positioned in the cavity. An inner sheath extends through an outer sheath and has a proximal end positioned between the inner sleeve and the shaft and a distal end comprising a threaded surface. The proximal end of the inner sheath includes a groove. The inner sleeve is movable relative to the outer sleeve to move the instrument between a first orientation in which the latch is positioned in the groove and the sheaths are prevented from translating relative to the outer sleeve and a second orientation in which the latch is spaced apart from the groove and the sheaths are translatable relative to the outer sleeve. Systems, implants and methods are disclosed.