The effects of Patent Blue dye on peripheral and cerebral oxyhaemoglobin saturations

摘要: We measured the effect of Patent Blue dye on oxyhaemoglobin saturations after injection into breast tissue: 40 women had anaesthesia for surgery maintained with sevoflurane or propofol (20 randomly allocated to each). Saturations were recorded a digital pulse oximeter, in arterial blood samples and cerebral tissue oximeter before 10, 20, 30, 40, 50, 60, 75, 90, 105 120 min afterwards. did not decrease saturation, but it reduce mean (SD) by 1.1 (1.1) % 6.8 (7.0) %, p < 0.0001 both. The falsely reduced readings persisted at least 2 h. intra-operative lower than propofol, 97.8 (1.2) 98.8 (1.0) respectively, p < 0.0001.