The High Pressure Nervous Syndrome During Human Deep Saturation and Excursion Diving
Abstract
The High Pressure Nervous Syndrome (HPNS) is a condition found in deep diving in excess of 400 feet (13 ATA) whilst breathing oxygen-helium. It is characterized by tremors, an increase in theta activity (4-7 c/sec) in the electroencephalogram (EEG) accompanied by a depression of faster activities and if sufficiently severe, lapses of consciousness. In animals, convulsions occur, but to date these have not been seen in man The HPNS is a complex phenomenon comprised of effects, some of which are a function of the hydrostatic pressure. Others seem due to a complex combination of the two. This paper describes briefly some of the relevant factors responsible for the HPNS in saturation and excursion diving.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1973
- Accession Number
- ADA004668
Entities
People
- A. J. Bachrach
- P. B. Bennett
Organizations
- Naval Medical Research Center