Fig. 4From: Skin temperature changes after ultrasound-guided supra-inguinal fascia iliaca block: a prospective observational studyHeat maps for each site. A temperature increase of >0°C was defined as the success between baseline and 5, 10, or 15 min. The sensitivity and specificity of the temperature increase to the cold loss were 96% and 63%, respectively. Black circle, no cold loss; LFCN, lateral femoral cutaneous nerve; Ob, obturator nerveBack to article page