Longitudinal ultrasound scan of the neck as part of a routine scan to identify the cricothyroid membrane with the ”String of pearls”1, 2 method. The transducer is in the saggital midline over the caudal part of the trachea. The anterior part of the tracheal rings are seen as ”dark pearls on a white string”.  A large pulsating blood-vessel  is seen superficial to the midline of the caudal part of the trachea, cranially to the jugular notch.  
Go to top