Measurement of flow in infusion systems

Area of Science:

• Biomedical Engineering
• Fluid Dynamics
• Sensor Technology

Background:

• Accurate flow measurement is critical for the safe and effective operation of medical infusion systems.
• Existing flow sensor technologies may have limitations in terms of accuracy, reusability, or applicability to various infusion fluids.
• Development of novel sensors is needed to enhance the performance and reliability of infusion therapies.

Purpose of the Study:

• To develop and present three distinct types of flow sensors for use in infusion systems.
• To evaluate the unique characteristics and potential applications of each sensor design.
• To offer advanced solutions for precise fluid delivery monitoring in medical settings.

Main Methods:

• Sensor 1: Time-of-flight measurement of an air bubble, incorporating a reusable bubble design.
• Sensor 2: Determination of pressure drop across a hydraulic bridge analogous to an electrical Wheatstone bridge.
• Sensor 3: Measurement based on heat transmission principles into the flowing liquid.

Main Results:

• Successful development of three distinct flow sensor prototypes for infusion systems.
• The air bubble sensor allows for repeated measurements within a single cycle.
• Each sensor exhibits unique performance characteristics influenced by its underlying physical principle and design.

Conclusions:

• The presented flow sensors offer diverse approaches to monitoring fluid dynamics in infusion applications.
• The novel designs provide potential for improved accuracy and functionality in medical fluid delivery.
• Further investigation into the specific performance metrics and clinical integration of each sensor is warranted.