Mechanomyography Nerve Function Assessment
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Solution Overview
Problem
Current methods for assessing changes in neural function after surgical procedures, such as decompression, lack a standardized and efficient way to quantify nerve function before and after interventions, often relying on subjective measures and incomplete assessments.
Innovation Solution
A method involving electrical stimulation of nerves and monitoring mechanical motion using mechanomyography to determine the minimum electrical stimulus required to induce muscle motion, both before and after surgical decompression, allowing for objective comparison of nerve function changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surgical decompression procedures are performed to remove impingements, then nerve function may be restored, but the ability to objectively quantify and assess the degree of functional change remains insufficient
Solution Approach 1:
The patent replaces subjective clinical assessment methods with objective mechanical sensing technology. Accelerometers and other mechanical sensors directly measure the mechanical response of muscles innervated by the tested nerve, converting physiological function into quantifiable mechanical data that can be objectively analyzed and compared before and after surgical intervention.
Solution Approach 2:
The patent introduces mechanical sensors as intermediary devices between the nerve stimulation and the assessment outcome. These sensors act as mediators that translate neural function into measurable mechanical signals, providing an objective bridge between the surgical intervention and the functional assessment, thereby preventing information loss in the quantification process.
2Measurement precision
If electrical stimulation and mechanical sensing are used to assess nerve function, then objective quantification is achieved, but the complexity of the assessment system increases
Solution Approach 1:
The patent employs a multi-functional assessment system where electrical stimulation devices and mechanical sensors work together within a unified platform. The system can perform multiple functions including baseline assessment, intraoperative monitoring, and postoperative evaluation, reducing the need for separate specialized equipment and thereby managing complexity through integration rather than proliferation of separate systems.
Solution Approach 2:
The patent utilizes changes in electrical stimulation parameters (such as pulse duration, frequency, and amplitude) to elicit measurable mechanical responses. By systematically varying these parameters and measuring the corresponding mechanical output, the system achieves precise quantification of nerve function without requiring overly complex measurement apparatus, as the complexity is managed through controlled parameter variation rather than system complexity.
3Reliability
If mechanical tissue removal procedures are used to decompress nerves, then impingement is relieved, but the time required for surgical intervention increases
Solution Approach 1:
The patent implements preliminary mechanical assessment of nerve function before surgical decompression. By establishing a baseline mechanical response to electrical stimulation prior to tissue removal, the system enables surgeons to plan more efficient interventions and objectively verify decompression efficacy, potentially reducing overall surgical time by avoiding unnecessary extensive tissue removal and facilitating more targeted, efficient decompression procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides a quantitative and objective assessment of nerve function, enabling precise evaluation of decompression efficacy and identifying changes in nerve sensitivity, thereby guiding surgical interventions more effectively.
Implementation Method 1
providing an electrical stimulus to a nerve
Implementation Method 2
monitoring the mechanical motion of a muscle innervated by the nerve
Data Source
AI summary
A method of determining a change in nerve function attributable to a surgical procedure includes assessing the nerve function via a first, induced mechanomyographic muscle response prior to the surgical procedure, and reassessing the nerve function via a second, induced mechanomyographic muscle response after the surgical procedure. Each mechanomyographic muscle response may be induced through an electrical stimulus provided directly to the nerve of the subject.