Adding time grade calculation method and practice in heliox conventional decompression scheme

VernacularTitle:氦氧常规潜水减压表增档计算方法与实践
Author: Changbo LIAO ¹ ; Gang LI ; Qingyuan ZHANG ; Guoju FU ; Xiaochen BAO ; Tao YANG
Author Information

1. 200433　上海，海军军医大学海军特色医学中心
Publication Type:Journal Article
Keywords: Heliox conventional diving; Decompression scheme; Supersaturation safety coefficient
From: Chinese journal of nautical medicine and hyperbaric medicine 2020;27(5):608-610
CountryChina
Language:Chinese
Abstract: Objective:To calculate a new depth-time heliox conventional diving decompression scheme for improving the training efficiency of deep heliox conventional diving.Methods:Based on the classical calculation model of Haldane’s diving decompression scheme, we used its supersaturation safety coefficient for 60-120 m heliox conventional diving decompression scheme, calculated the decompression schemes for 80 m/15 min, 100 m/15 min, and 120 m/15 min depth-time diving, and verified them by training.Results:The total decompression time of the three schemes were shortened by 20, 31, and 36 min respectively than those of the depth/ 20 min scheme at the same depth. After 54 person/times heliox conventional diving trials, no decompression sickness symptoms were found.Conclusion:A new heliox conventional diving decompression scheme with every 5 minutes as an interval for underwater operation can effectively improve the diving training efficiency while ensuring divers’ safety.