An in-line microfluidic blood sampling interface between patients and saline infusion systems

Area of Science:

• Biomedical Engineering
• Microfluidics
• Clinical Diagnostics

Background:

• Hospitalized patients require frequent blood sampling, often via invasive needle punctures or catheters.
• Existing automated systems are typically large, research-grade, and not suitable for routine patient care.
• A need exists for a disposable, user-friendly device for repeated blood collection in clinical settings.

Purpose of the Study:

• To develop and demonstrate a microfluidic device for routine blood sampling in hospitalized patients.
• To mitigate risks of sample cross-contamination and microbial contamination.
• To enhance the technical ease and efficiency of blood sample collection.

Main Methods:

• Design and fabrication of a 3-layered rigid polymer microfluidic device.
• Integration of polymer pinch valves for inline blood sampling.
• Demonstration of the device's functionality within a simulated clinical workflow.

Main Results:

• Successful fabrication and demonstration of the microfluidic blood sampling device.
• The device integrates seamlessly with existing saline infusion systems.
• Potential for reduced contamination and improved sampling efficiency was shown.

Conclusions:

• The developed microfluidic device offers a promising solution for routine blood sampling in hospitalized patients.
• It addresses key challenges including contamination and ease of use.
• The device is designed for backward compatibility with current clinical protocols and point-of-care testing devices.