Rod Reducer Load Feedback for Precise Spinal Rod Seating
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Solution Overview
Problem
Conventional rod-based spinal fixation procedures rely heavily on surgeon expertise for determining proper loading of rod reducers, which can be challenging, especially in multi-level procedures, and there is a need for improved methods to ensure accurate and efficient alignment and seating of spinal rods.
Innovation Solution
The implementation of a rod reduction instrument equipped with a sensor to detect load exerted by the reducer on the spinal rod, coupled with a reduction feedback system that provides real-time indicators to the operator, ensuring accurate and efficient seating of the spinal rod into pedicle screw receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional reduction procedures are used without feedback systems, then the device complexity is low, but the manufacturing precision and reliability of rod seating are compromised due to reliance on surgeon expertise alone
Solution Approach 1:
The patent implements a feedback system that includes sensors (strain gauges, load cells) integrated into the rod reducer instrument to detect load forces during rod seating. This feedback is transmitted to a display device that provides real-time visual or tactile cues to the surgeon, enabling precise control of reduction forces and ensuring accurate rod seating into the pedicle screw receiver.
Solution Approach 2:
The patent replaces reliance on surgeon tactile expertise and manual judgment with an electronic sensing and feedback system. The mechanical reduction process is augmented with electronic load measurement and digital display systems, transforming a purely mechanical/manual operation into a monitored and controlled process with objective feedback.
2Reliability
If surgeon expertise is relied upon to judge load applied by rod reducers, then the device complexity remains low, but the reliability of proper rod seating is reduced due to difficulty in determining which rod reducers are properly loaded
Solution Approach 1:
The feedback system provides real-time load information through visual displays or tactile cues, enabling the surgeon to reliably determine when proper reduction force is applied. This eliminates uncertainty about whether rod reducers are properly loaded and ensures consistent, reliable rod seating across multiple vertebrae.
Solution Approach 2:
The patent introduces an intermediary feedback system that mediates between the mechanical reduction action and the surgeon's decision-making. The sensor and display act as intermediaries that translate mechanical load into comprehensible feedback signals, removing the need for the surgeon to directly judge complex mechanical forces.
3Productivity
If multi-level fixation procedures are performed with multiple vertebrae, then the productivity and comprehensiveness of spinal alignment correction is improved, but the difficulty of detecting and measuring proper loading increases due to challenge in determining which rod reducers are properly loaded
Solution Approach 1:
The feedback system enables simultaneous monitoring of multiple rod reducers during multi-level procedures. Each reducer's load status is displayed, allowing the surgeon to efficiently determine which vertebrae require adjustment and which are properly seated, streamlining the multi-level correction process.
Solution Approach 2:
The feedback system provides universal monitoring capability across all rod reducers regardless of vertebral level. The same sensor and display technology works for single-level or multi-level procedures, making the system adaptable and efficient for various surgical scenarios.
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
Enhances procedural accuracy by providing real-time feedback, reducing the risk of operator error, and improving patient outcomes by ensuring proper loading and alignment of spinal fixation constructs.
Implementation Method 1
a sensor configured to detect a load exerted by the rod reducer on the spinal rod during seating of the spinal rod in the pedicle screw receiver
Data Source
AI summary
Various implementations include rod reduction instruments, spinal fixation monitoring systems, and related methods. Certain implementations include a rod reduction instrument that is adapted for use with a spinal fixation system and includes a sensor configured to detect a load exerted by a rod reducer on a spinal rod, along with a reduction feedback system that provides an indicator of the load exerted by the rod reducer on the spinal rod.