Syringe Needle With Integrated Pressure Sensor
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Solution Overview
Problem
Current needle and syringe systems lack accurate, objective, and real-time feedback for determining the correct placement of the needle tip during injections, leading to risks of intraneural and intravascular injections, which can result in nerve damage and other complications due to subjective interpretation of injection pressure.
Innovation Solution
A needle with a pressure sensor integrated into the shaft that measures injection pressure in real-time and alerts the user with an alarm if the pressure exceeds or falls below predetermined thresholds, allowing for precise detection of inappropriate needle placement and continuous pressure wave profile recording for pattern recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensor is integrated into the needle shaft to measure injection pressure in real-time, then measurement precision and reliability are improved, but device complexity increases
Solution Approach 1:
The pressure sensor is nested within the needle shaft, with the sensor housing positioned inside the hollow needle structure. This allows the measurement function to be integrated into the existing needle geometry without significantly increasing external dimensions or structural complexity.
Solution Approach 2:
The pressure sensor, alarm system, and needle structure are merged into a single integrated device. The sensor measures pressure directly at the needle tip location, and the alarm function is combined with the needle assembly, eliminating the need for separate external monitoring devices.
2Reliability
If real-time pressure monitoring and alarm systems are added to detect inappropriate needle placement, then reliability and safety are improved, but device complexity increases
Solution Approach 1:
The pressure sensor provides real-time feedback on injection pressure to the alarm system. When the pressure exceeds or falls below predetermined thresholds, the alarm immediately alerts the user, enabling continuous monitoring and correction of needle placement without requiring complex manual assessment procedures.
3Measurement precision
If continuous pressure wave profile recording is implemented for pattern recognition, then measurement precision and diagnostic capability are improved, but use of energy and data storage requirements increase
Solution Approach 1:
Pressure threshold values are predetermined and stored in the device before use, based on clinical guidelines for different injection sites and procedures. This preliminary configuration allows the device to immediately begin accurate monitoring without requiring real-time calibration or complex data processing algorithms.
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 solution provides accurate and objective real-time feedback, reducing the incidence of complications by ensuring precise needle placement, minimizing nerve and vascular injuries, and offering evidence for adherence to clinical standards.
Implementation Method 1
a pressure sensor in the needle to measure pressure of liquid in the needle
Data Source
AI summary
It is disclosed a needle for a syringe, including a tip at one end of the needle, adapted to penetrate a body tissue during usage of the syringe, and a hub at the other end of the needle, to attach the needle to the syringe. A pressure sensor is in the needle; means are provided to transmit outside the needle a pressure value sensed by the pressure sensor in the shaft.