Disposable Vertebral Spacer Size Indicator for Spinal Fusion
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Solution Overview
Problem
Surgeons face challenges in accurately selecting and placing intervertebral implants during spinal fusion and total disc replacement surgeries due to the lack of precise measurement tools for the intervertebral disc space, leading to potential complications from improper sizing and placement.
Innovation Solution
A disposable, minimally invasive measuring device capable of measuring the width, height, and depth of the intervertebral disc space using a medical-grade polymer, featuring slidable cursors and a detachable stop for precise dimension assessment, with optional X-ray markers for depth detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surgeons use trial devices made from expensive metals to measure intervertebral space, then measurement precision is improved, but device cost increases and disposal becomes difficult
Solution Approach 1:
The patent applies this principle by creating a measuring device from inexpensive, disposable materials (polymer or plastic) instead of expensive metals. The device can be discarded after single use, eliminating the need for costly sterilization and storage of metal trial devices while maintaining adequate measurement precision through properly calibrated scales and indicators.
2Device complexity
If surgeons rely on experience and feel to size intervertebral implants, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies this principle by providing a self-contained measuring device that surgeons can use independently without requiring complex imaging systems or additional specialized equipment. The device includes integrated scales, indicators, and insertion guides that enable accurate measurement through straightforward mechanical operation, combining simplicity with precision.
3Ease of operation
If conventional distractors are used for spinal surgery, then ease of operation is improved, but measurement precision deteriorates due to inability to measure all three dimensions
Solution Approach 1:
The patent applies this principle by designing a single measuring device that performs multiple functions: measuring width, height, and depth dimensions, providing implant size indicators, and guiding insertion. This multi-functional design replaces the need for multiple separate tools while maintaining ease of operation through integrated features and straightforward usage procedures.
Data Source
AI summary
A disposable measuring device for use in measuring the width, height and depth of an intradiscal space is provided, the device including an elongated body having an upper surface, a lower surface, a proximal end and a distal end. The elongated body also has a first pair of members configured for receiving a first cursor slidably arranged for measuring a width dimension, a second pair of members configured for receiving a second cursor slidably arranged for measuring a height dimension; and a detachable stop operatively connected to the first pair of members and the second pair of members, the detachable stop insertable into at least one opening located at the proximal end of the elongated body, the detachable stop configured for measuring a depth dimension.