Fig. 2From: An easier and safe affair, pleural drainage with ultrasound in critical patient: a technical noteVisualisation of intercostal vessels using Doppler ultrasound. The probe marker is facing the patient’s head (on the right of the screen). The colour Doppler box should be placed on the bottom edge of the rib and the depth reduced until the rib does not occupy the entire screen. Pulse repetition frequency (PRF) should be reduced until pulsation is detectedBack to article page