Spinal Probe Pressure Detection for Epidural Positioning
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Solution Overview
Problem
Current medical procedures for accessing the spinal canal, such as epidural anesthesia and lumbar punctures, face challenges due to the lack of sensitivity in detecting accurate needle positioning, leading to complications like cerebrospinal fluid leaks and prolonged procedure times, as the 'loss of resistance' technique is not reliable and often requires time-consuming verification methods.
Innovation Solution
A detection device with a pressure sensing system that indicates probe positioning in the spinal canal by detecting changes in pressure, allowing for real-time monitoring and confirmation of needle entry into the epidural or subarachnoid space, reducing the risk of accidental dural puncture and improving procedure efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the 'loss of resistance' technique is used to identify the epidural space, then the procedure can be performed with simple equipment, but the positioning accuracy is insufficient leading to complications
Solution Approach 1:
The patent replaces the mechanical 'loss of resistance' technique with a pressure sensing system that uses electronic sensors and digital display to detect needle positioning. The pressure sensor detects pressure changes in the spinal canal, and a processor analyzes these changes to provide visual feedback, substituting mechanical tactile detection with electronic sensing and display.
2Productivity
If the 'loss of resistance' technique is used, then the device structure remains simple, but the procedure time increases due to time-consuming verification
Solution Approach 1:
The patent implements a real-time feedback system where the pressure sensor continuously monitors pressure changes, the processor analyzes the data, and the visual display provides immediate feedback to the operator about needle positioning. This continuous feedback loop eliminates the need for time-consuming verification steps by providing real-time confirmation of correct positioning.
Solution Approach 2:
The electronic pressure sensing and visual display system replaces the manual, time-consuming verification processes with automated electronic detection and display, significantly reducing the time required to verify correct needle placement in the epidural space.
3Reliability
If the needle is advanced without precise positioning detection, then the insertion process is simpler, but the risk of dural puncture and CSF leak increases
Solution Approach 1:
The patent replaces manual needle advancement without precise detection with an electronic pressure sensing system that continuously monitors positioning. The pressure sensor detects pressure changes that indicate needle entry into the epidural space, and the visual display provides real-time feedback, eliminating the need for manual estimation and reducing the risk of dural puncture.
Solution Approach 2:
The real-time feedback system provides continuous monitoring of needle positioning through pressure detection and visual display, allowing the operator to stop advancement at the precise moment of epidural space entry. This feedback mechanism prevents over-advancement and dural puncture by providing immediate information about needle position.
4Measurement precision
If catheter misplacement occurs in surrounding muscles, then the initial insertion is easier, but the verification process becomes more complex and time-consuming
Solution Approach 1:
The patent replaces the complex verification process involving drug injection and waiting for effects with a pressure sensing system that provides immediate detection of catheter placement accuracy. The pressure sensor detects pressure changes that confirm correct epidural space placement, eliminating the need for time-consuming pharmacological verification.
Solution Approach 2:
The real-time pressure feedback system continuously monitors catheter positioning, providing immediate visual confirmation of correct placement in the epidural space. This eliminates the need for delayed verification methods and allows for immediate correction if misplacement is detected.
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 device enables precise and rapid identification of needle placement, reducing complications and procedure time, enhancing patient safety and reducing the likelihood of post-dural puncture headaches and bloody taps, while allowing for more efficient measurement and management of cerebrospinal fluid pressure.
Implementation Method 1
detecting a change in pressure about the distal portion of the coupled probe during advancing
Data Source
AI summary
Methods and devices for detecting positioning of a probe in a tissue of a patient. A method can include providing a detection device; advancing a device coupled probe through the tissue of the patient and toward the patient's spinal canal; detecting a change in pressure about the distal portion of the coupled probe during advancing, where the detected pressure change indicates probe positioning in the patient's spinal canal; outputting the detected pressure change or indication of probe positioning to a visual display.