"SmartDop-15 MGE" is also intended for conducting long-term extracranial Doppler studies of blood circulation and intravascular gas embolus detection under prolonged hypobaric conditions at altitudes ranging from 0 to 6,000 meters (lasting from 2 to 4 hours or more), without the need for special protective equipment, provided that the orientation and fixation of the ultrasound transducer probes on the subject are maintained after initial positioning and alignment with the target vessels.