Project number
27058
Organization
UA College of Medicine
Offering
ENGR498-F2026-S2027
This invention relates to a novel, real-time blood loss quantification device for use in surgical and obstetric settings. The system estimates blood volume absorbed by surgical gauze or sponges by extracting hemoglobin into a fixed-volume reagent (e.g., Drabkin’s reagent), forming cyanmethemoglobin, and then quantifying absorbance at 540 nm using an optical detection module based on Beer–Lambert Law.
The device includes a disposable gauze cartridge with a sieve, a reagent chamber, and an optical cuvette aligned with dual-wavelength LEDs (540 nm and 850–880 nm) and a photodetector (e.g., OPT101). A microcontroller calculates hemoglobin concentration, compensates for turbidity via secondary IR LED measurement, and estimates total blood loss in mL using patient-entered baseline hemoglobin.
The solution improves accuracy over gravimetric and camera-based methods (e.g., Gauss Triton), minimizes interference from non-blood fluids, and is suitable for clinical, low-resource, and emergency settings.
The device includes a disposable gauze cartridge with a sieve, a reagent chamber, and an optical cuvette aligned with dual-wavelength LEDs (540 nm and 850–880 nm) and a photodetector (e.g., OPT101). A microcontroller calculates hemoglobin concentration, compensates for turbidity via secondary IR LED measurement, and estimates total blood loss in mL using patient-entered baseline hemoglobin.
The solution improves accuracy over gravimetric and camera-based methods (e.g., Gauss Triton), minimizes interference from non-blood fluids, and is suitable for clinical, low-resource, and emergency settings.