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Risk assessment of SWEN21 a suggested new dive table for the Swedish armed forces: bubble grades by ultrasonography.
Hjelte, Carl; Plogmark, Oscar; Silvanius, Mårten; Ekström, Magnus; Frånberg, Oskar.
Afiliación
  • Hjelte C; Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, Respiratory Medicine and Allergology, Lund, Sweden.
  • Plogmark O; Swedish Armed Forces Diving and Naval Medicine Center, Swedish Armed Forces, Karlskrona, Sweden.
  • Silvanius M; Sahlgrenska University Hospital, Anesthesia and Intensive Care, Gothenburg, Sweden.
  • Ekström M; Corresponding author: Dr Carl Hjelte, Kungsladugårdsgatan 113B. 414 76, Gothenburg, Sweden, ORCiD: 0009-0009-5522-8735, carl_hjelte@hotmail.com.
  • Frånberg O; Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, Respiratory Medicine and Allergology, Lund, Sweden.
Diving Hyperb Med ; 53(4): 299-305, 2023 Dec 20.
Article en En | MEDLINE | ID: mdl-38091588
Introduction: To develop the diving capacity in the Swedish armed forces the current air decompression tables are under revision. A new decompression table named SWEN21 has been created to have a projected risk level of 1% for decompression sickness (DCS) at the no stop limits. The aim of this study was to evaluate the safety of SWEN21 through the measurement of venous gas emboli (VGE) in a dive series. Methods: A total 154 dives were conducted by 47 divers in a hyperbaric wet chamber. As a proxy for DCS risk serial VGE measurements by echocardiography were conducted and graded according to the Eftedal-Brubakk scale. Measurements were done every 15 minutes for approximately 2 hours after each dive. Peak VGE grades for the different dive profiles were used in a Bayesian approach correlating VGE grade and risk of DCS. Symptoms of DCS were continually monitored. Results: The median (interquartile range) peak VGE grade after limb flexion for a majority of the time-depth combinations, and of SWEN21 as a whole, was 3 (3-4) with the exception of two decompression profiles which resulted in a grade of 3.5 (3-4) and 4 (4-4) respectively. The estimated risk of DCS in the Bayesian model varied between 4.7-11.1%. Three dives (2%) resulted in DCS. All symptoms resolved with hyperbaric oxygen treatment. Conclusions: This evaluation of the SWEN21 decompression table, using bubble formation measured with echocardiography, suggests that the risk of DCS may be higher than the projected 1%.
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Texto completo: 1 Base de datos: MEDLINE Asunto principal: Enfermedad de Descompresión / Buceo / Embolia Aérea País/Región como asunto: Europa Idioma: En Revista: Diving Hyperb Med Año: 2023 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Enfermedad de Descompresión / Buceo / Embolia Aérea País/Región como asunto: Europa Idioma: En Revista: Diving Hyperb Med Año: 2023 Tipo del documento: Article