Syringe Pump Pressure Sensor Assembly for Occlusion Detection
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Solution Overview
Problem
Existing syringe pumps lack efficient mechanisms for accurately delivering fluids and monitoring pressure, leading to potential inaccuracies and safety concerns in medical applications.
Innovation Solution
A syringe pump design incorporating a pressure sensor assembly, a sliding block assembly with a cam mechanism for precise engagement and disengagement with the lead screw, and a clamping mechanism for securing plunger flanges of varying sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure sensor assembly is integrated into the syringe pump, then pressure monitoring capability is improved, but device complexity increases
Solution Approach 1:
The pressure sensor is integrated into the existing syringe pump structure by mounting it on the housing near the syringe barrel, combining pressure monitoring functionality with the fluid delivery system. This merging approach enables pressure monitoring without requiring a completely separate system, thereby improving reliability while controlling the increase in device complexity.
2Manufacturing precision
If a sliding block assembly with cam mechanism is used for lead screw engagement, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The sliding block assembly with cam mechanism is designed to automatically engage and disengage from the lead screw through predetermined motion paths. The cam geometry is pre-configured to ensure precise engagement at specific positions, eliminating the need for complex control systems to achieve manufacturing precision. This preliminary design of the engagement mechanism provides precise positioning while maintaining relatively simple device architecture.
3Adaptability or versatility
If a clamping mechanism for various plunger flange sizes is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The clamping mechanism is designed with adjustable components that can accommodate multiple plunger flange sizes through a single mechanism. By incorporating movable clamping arms and adjustable positioning elements, the system achieves universal compatibility with different syringe types without requiring separate clamping mechanisms for each flange size, thereby improving adaptability while controlling device complexity.
Data Source
AI summary
A syringe pump is disclosed that includes a pressure sensor assembly, a plunger, first and second pressure sensors, and a processor. The pressure sensor assembly senses a force and includes the plunger having a sensing surface configured to receive the force, the first pressure sensor operatively coupled to the plunger and configured to estimate the force applied to the sensing surface, and the second pressure sensor operatively coupled to the plunger and configured to estimate the force applied to the sensing surface. The processor is coupled to the first and second pressure sensors to estimate a magnitude of the force.