Milestones of the deep diving resarch laboratory Zurich.

Rubicon Research Repository/Manakin Repository

Milestones of the deep diving resarch laboratory Zurich.

Show full item record


Title: Milestones of the deep diving resarch laboratory Zurich.
Author: Wendling, J; Nussberger, P; Schenk, B
Abstract: Between 1959 and 1963 the deep diving pioneer Hannes Keller performed a series of depth records using heliox. He was assisted by the lung physiologist Professor AA Bühlmann of Zurich University. In 1961 application of a modified multi-tissue, perfusion limited, decompression algorithm for nitrogen and helium enabled an open sea dive to 305 m at Santa Catalina Island off California. However the price was a fatality. This dive was a break through for commercial diving, proving the feasibility of deep diving with helium. A research contract with Shell, to develop decompression tables for offshore work, allowed the restructured research team at Zurich to construct a 100 ATA hyper- and hypobaric, multichamber, research and treatment facility, planned and directed by one of the authors (BS), an engineer. Experimental dives were continued down to 220 and 350 m at Alverstoke, UK, in 1969, and to 575 m in Zurich in 1981. The original decompression tables were empirically modified and became widely used. The problems of calculated tables and true reality will be discussed. Altitude dive tables for scuba bounce diving were produced to meet the needs of military and police divers in Switzerland. Dive tables using the same algorithms as used for the deep dive experiments were calculated and tested for different altitude ranges. Bühlmann postulated a linear relationship of his supersaturation tolerance coefficients to the external pressure. In 1972 the first altitude table was produced using a 12-tissue model and in 1986 the actual set of tables was produced based on 16 tissues. In a period of general rejection of any diving practices using computers as on-line dive planners, Bühlmann supported the adaptation of the Zurich tables for diving computers. The 1986 model has been further adapted to take into account workload, temperature, respiratory rate and inadequate decompression procedures specially considering the bubbles load of the lungs during certain phases. The actual activities of the hyperbaric facility can be divided into the development of deep dive breathing apparatus and research into clinical hyperbaric oxygen (HBO) therapy.
Description: Journal of the South Pacific Underwater Medicine Society.
URI: http://archive.rubicon-foundation.org/6003
Date: 1999

Files in this item

Files Size Format View
SPUMS_V29N2_7.pdf 548.8Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Browse

My Account