Surgical Knot Evaluation via Pressure Mapping
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Solution Overview
Problem
Current methods for assessing surgical knot formation are subjective and lack objective feedback, making it difficult for surgeons and trainees to improve their knot-tying skills, especially in minimally invasive procedures where knot tension and distribution are critical to prevent complications like paravalvular leaks.
Innovation Solution
A system using a pressure sensor and controller to transform pressure data from surgically relevant objects into pressure maps, providing objective feedback on knot formation and tension distribution, which can be displayed for training and evaluation purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If subjective assessment methods are used for evaluating surgical knot formation, then the assessment process is simple and quick, but the measurement precision and reliability are poor
Solution Approach 1:
The patent replaces subjective mechanical assessment (visual inspection by surgeons) with an automated sensor-based measurement system. Pressure sensors, load cells, and force sensors objectively measure knot tension, pressure distribution, and formation forces, eliminating human subjectivity and providing quantifiable data for knot evaluation.
Solution Approach 2:
The patent introduces intermediary measurement devices (pressure sensors, load cells, force sensors) that mediate between the knot formation process and the assessment outcome. These sensors act as intermediaries that translate physical knot characteristics into measurable signals, enabling objective evaluation without direct human intervention in the measurement process.
2Reliability
If objective feedback systems are implemented, then the reliability of knot formation evaluation is improved, but the device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where sensor measurements of knot tension and pressure are processed and compared against optimal values. The system provides real-time or post-operative feedback to surgeons about their knot-tying performance, enabling continuous improvement and consistent quality while maintaining reliable objective assessment.
Solution Approach 2:
The evaluation system is designed to autonomously perform measurements and assessments without requiring external expert intervention. The sensors automatically detect knot characteristics, the processor analyzes the data, and the system generates evaluations independently, making the reliable assessment process self-sufficient and reducing operational complexity.
3Measurement precision
If multiple sensors and measurement devices are used to capture comprehensive knot data, then the measurement precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent combines multiple measurement functions (pressure sensing, force measurement, tension detection) into an integrated evaluation system. Multiple sensors are merged into a coordinated measurement network that collectively assesses knot formation, reducing the operational burden of managing separate devices while maintaining comprehensive measurement precision.
Solution Approach 2:
The evaluation system is designed with multi-functional capabilities that allow a single integrated system to perform various knot assessment tasks. The sensor array and processing unit can evaluate different knot types, tension levels, and pressure distributions using the same hardware platform, simplifying operation while providing precise multi-parameter measurement.
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
The system offers a reliable and reusable method for evaluating surgical knot formation, enabling objective assessment and improving knot-tying skills, thereby reducing the risk of complications such as paravalvular leaks by providing immediate and accurate feedback.
Implementation Method 1
a pressure sensor...transform signals from the pressure sensor into a pressure map having pressure magnitudes from a plurality of locations on the pressure sensor
Data Source
AI summary
A system for evaluating surgical knot formation is disclosed. The system includes a first surgically relevant object, a pressure sensor, and at least one pair of suture ends passing through the pressure sensor and the first surgically relevant object. The system also includes a controller coupled to the pressure sensor and configured to 1) transform signals from the pressure sensor into a pressure map having pressure magnitudes from a plurality of locations on the pressure sensor corresponding to one or more knots which may be formed in the at least one pair of suture ends; and 2) format the pressure map for display.