Figure 3.

Localizing the bedside lung ultrasound in emeregency (BLUE) points [7]. (A) The radiologist first compares their hands with the patient's and places one hand just below the clavicle with fingertips at the midline. The “upper BLUE point” is located at the root of the middle and ring fingers. The other hand is applied just below the upper one, excluding the thumb. The “lower BLUE point” is located in the middle of the palm of the lower hand with the inferior edge of the little finger indicating the “phrenic line.” (B) The “posterolateral alveolar and/or pleural syndrome (PLAPS) point” which lies at the intersection of the posterior continuation of lower BLUE point and posterior axillary line, is used to scan the posterior lung zones in a critically ill patient in supine/semi-recumbent position. It is best performed with a small footprint probe (C, D) which is held like a tennis racket, placed perpendicular to the PLAPS point, and directed as cranially as possible for a wider scanning window.