Horizon - Doctors in the Death Zone 1of2 - [2007-09-23]
Horizon - Doctors in the Death Zone 2of2 - [2007-09-30]
This two-part special follows a team of doctors conducting a series of groundbreaking experiments as they climb Everest, the world's highest peak.
From their laboratory tents, pitched in -25Â°C conditions, the experts use their own bodies for medical tests. They push themselves to the limit to better understand the human body's behaviour in a low-oxygen environment.
The team hopes their work will lead to new, life-saving treatments for intensive care patients suffering from hypoxia, a shortage of oxygen in the body.