Eckenhoff R G, Vann R D
Undersea Biomed Res. 1985 Mar;12(1):41-52.
Seventy-seven subjects were decompressed from air or nitrogen-oxygen (nitrox) saturation exposures at 18.3 to 40.2 meters sea water (msw) [60 to 132 feet sea water (fsw)] using four different decompression schedules. A h schedule for decompression from an air saturation-excursion profile at 18.3 msw (60 fsw) resulted in pain-only decompression sickness (DCS) symptoms in 2 of 23 subjects. A 32 and 35 h schedule from a different air saturation profile at 19.8 and 22.9 msw (65 and 75 fsw), respectively, resulted in DCS symptoms in 1 of 24 subjects. A third and fourth schedule for air or nitrox saturation at 40.2 msw (132 fsw) resulted in DCS symptoms in 3 of 12 and 1 of 18, respectively. No serious (type II) symptoms were observed as a result of any of the decompressions. All DCS cases consisted of knee pain occurring either in the last 3 msw of the decompression or shortly after surfacing. Doppler ultrasound monitoring revealed venous gas emboli (VGE) in several subjects, but generally only shallow to 6.1 msw (20 fsw). Results demonstrate an overall DCS incidence of 9%, and all cases were pain-only and localized to the knee. The third schedule (U.S. Navy heliox saturation decompression schedule) seems to produce a higher incidence of DCS than the other schedules when used in air or nitrox exposures. Differentiation between the schedules designed for nitrox was impossible due to the limited number of subjects in each and the variable nature of the exposures.
77名受试者在18.3至40.2米海水深度（相当于60至132英尺海水深度）下进行了空气或氮氧混合气（高氧氮）饱和潜水减压，采用了四种不同的减压方案。在18.3米海水深度（60英尺海水深度）下，按照一种针对空气饱和潜水行程剖面的h方案进行减压，23名受试者中有2人出现了仅表现为疼痛的减压病（DCS）症状。分别在19.8米和22.9米海水深度（65和75英尺海水深度）下，按照不同的空气饱和潜水剖面采用32小时和35小时的减压方案，24名受试者中有1人出现了DCS症状。在40.2米海水深度（132英尺海水深度）下，针对空气或高氧氮饱和潜水的第三种和第四种减压方案，分别有12名受试者中的3人以及18名受试者中的1人出现了DCS症状。所有减压过程均未观察到严重（II型）症状。所有DCS病例均表现为在减压的最后3米海水深度期间或浮出水面后不久出现膝盖疼痛。多普勒超声监测发现部分受试者存在静脉气体栓塞（VGE），但一般仅出现在浅至6.1米海水深度（20英尺海水深度）处。结果显示，DCS的总体发生率为9%，所有病例均仅表现为疼痛且局限于膝盖。当用于空气或高氧氮潜水时，第三种减压方案（美国海军氦氧饱和减压方案）似乎比其他方案产生更高的DCS发生率。由于每种方案下的受试者数量有限以及潜水暴露情况的多变性，无法区分针对高氧氮设计的减压方案。
