Figure 3.

Validation of hematuria monitor across differing concentrations of blood in continuous bladder irrigation (CBI) effluent. Eight known volume/volume (mL blood to mL saline) dilutions of thawed, heparinized pig’s blood in saline were prepared and placed within the spectrophotometer shroud. On the X-axis, values to the right correspond to higher concentrations of blood. Hemoglobinuria estimates from the spectrophotometer shroud were recorded and plotted alongside values of known dilutions. An image of the dilution tubes is included for reference to assess the subjective color range of the tubes.