Accession Number : ADA297456

Title :   Statistical Bubble Dynamics Algorithms for Assessment of Altitude Decompression Sickness Incidence.

Descriptive Note : Final technical rept. Jun 92-Oct 94,

Corporate Author : DUKE UNIV MEDICAL CENTER DURHAM NC

Personal Author(s) : Gerth, Wayne A. ; Vann, Richard D.

PDF Url : ADA297456

Report Date : JUL 1995

Pagination or Media Count : 103

Abstract : Air Force personnel are routinely exposed to atmospheric decompressions that often incur significant risk of decompression sickness (DCS). Management of these risks requires analytic methods able to: (a) define risk/hazard envelopes for all routine and emergency decompressions, (b) assess the DCS risks included or introduced in the contemplation or design of new operational procedures and equipment, and; (c) support real-time monitoring of DCS risk incurred by personnel during various chamber and aircraft operations. Present work contributed to meeting these requirements through development and application of methods by which DCS risks during decompression profiles are determined from statistical/biophysical models of in vivo gas exchange and bubble growth and resolution using maximum likelihood, both logistic and survival models were fit to DCS incidence data from the USAF Armstrong Laboratory (USAFAL) for a wide variety of decompression profiles. The models were incorporated into software that operates on personal computers. System software, including a data transcription routine to serve as a software interface between the USAFAL Hypobaric Decompression Sickness Database and the present modeling system, was delivered for use and evaluation of USAFAL personnel.

Descriptors :   *ALGORITHMS, *DYNAMICS, *DECOMPRESSION SICKNESS, COMPUTER PROGRAMS, DATA BASES, MATHEMATICAL MODELS, EMERGENCIES, AIRCRAFT, MODELS, MONITORING, INTERFACES, GROWTH(GENERAL), MAXIMUM LIKELIHOOD ESTIMATION, STATISTICS, SURVIVAL(GENERAL), AIR FORCE PERSONNEL, PROFILES, BUBBLES, LOGISTICS, MICROCOMPUTERS, STATISTICAL ANALYSIS, NUMERICAL METHODS AND PROCEDURES, IN VIVO ANALYSIS, HYPOBARIC CONDITIONS, GAS EXCHANGE(BIOLOGY), BIOPHYSICS, ALTITUDE SICKNESS.

Subject Categories : Stress Physiology
      Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE