Physiological training in Jordan.

The hypobaric chamber is designed as a teaching aid in providing orientation for some of the physiological stresses in flight. Reactions during chamber training vary from mild ear block to neurocirculatory collapse. This is a retrospective study on reactions from 1986-94 in the hypobaric chamber training unit at King Hussien Medical Centre in Jordan; 39 cases were reported among 705 trainees in a 12-person rectangular hypobaric chamber.