Optical Identification of Parenteral Nutrition Solutions Exploiting Refractive Index Sensing

Area of Science:

• Biomedical Engineering
• Optofluidics
• Medical Diagnostics

Background:

• Parenteral artificial nutrition (PAN) is critical for patients unable to consume food orally.
• Incorrect administration of PAN solutions poses significant risks to patient health.
• Current methods for verifying PAN solutions can be cumbersome or prone to error.

Purpose of the Study:

• To develop and validate an optofluidic sensor for label-free, real-time identification of parenteral artificial nutrition (PAN) solutions.
• To enhance the safety of PAN delivery by preventing the administration of incorrect fluids.
• To create a contactless sensing platform for integration into infusion pumps.

Main Methods:

• An optofluidic sensor utilizing a laser diode and a 1-D position sensitive detector (PSD).
• Measurement of fluid refractive index (RI) by analyzing the displacement of a back-reflected light spot.
• Calibration with water-glucose solutions and testing with commercial PAN formulations.

Main Results:

• The sensor demonstrated high sensitivity (S = 13,960 µm/RIU) in calibration.
• Successfully distinguished between six different commercial PAN solutions based on their RI.
• The system provides a quantitative, label-free method for fluid identification.

Conclusions:

• This novel optofluidic sensor offers a reliable method for identifying PAN solutions.
• The technology has the potential to significantly improve patient safety by preventing medication errors.
• Integration into infusion pumps could provide real-time verification of delivered PAN fluids.