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Urinary vasopressin and aldosterone and plasma volume during a saturation dive to 450 m. 饱和潜水至450米时尿加压素、醛固酮和血浆容量。

Undersea biomedical research Pub Date : 1992-07-01

J R Claybaugh, J M Goldinger, R E Moon, T A Fawcett, A G Exposito, S K Hong, J Holthaus, P B Bennett

{"title":"Urinary vasopressin and aldosterone and plasma volume during a saturation dive to 450 m.","authors":"J R Claybaugh, J M Goldinger, R E Moon, T A Fawcett, A G Exposito, S K Hong, J Holthaus, P B Bennett","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Urinary vasopressin (VP), aldosterone (ALDO), osmotic substances, sodium excretion, and plasma volume were assessed in 4 healthy male divers during 2 predive control days, 2 compression days, 6 days at 46 atm abs, and 26 days of decompression with stops at 37 and 27 atm abs. At pressure the ambient gas was trimix (0.5 atm abs O2:5% N2:remainder He). All urine was collected throughout the dive. Samples were divided into daytime (0700-1900) and nighttime (1900-0700). Indocyanine green dye dilution was used to determine plasma volume at predive 1, 46, and 24 atm abs. In agreement with previous dives at 31 atm abs, there was a decrease in VP excretion during compression lasting until return to 1 atm abs (P less than 0.05). Also similar to the shallower dives at 31 atm abs, the normal diurnal pattern of VP excretion, daytime higher than nighttime (P less than 0.05), disappeared at pressure. Urine osmolality showed alterations compatible with responses to VP. In contrast to previous studies at 31 atm abs, but in agreement with a previous study at 49.5 atm abs, there was no sustained increase in urinary ALDO excretion and only a transient natriuresis during the compression phase, followed by a reduced sodium excretion. In confirmation of earlier conclusions from indirect evidence, direct measurements of plasma volume indicated a reduction of about 20% (P less than 0.05) at 46 atm abs which remained reduced after decompression to 24 atm abs.</p>","PeriodicalId":76778,"journal":{"name":"Undersea biomedical research","volume":"19 4","pages":"295-304"},"PeriodicalIF":0.0,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12526853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Management of herniated intervertebral disks during saturation dives: a case report. 饱和潜水期间椎间盘突出的处理:1例报告。

Undersea biomedical research Pub Date : 1992-05-01

D M Stevens, B G Caras, E T Flynn, A J Dutka, J W Thorp, E D Thalmann

{"title":"Management of herniated intervertebral disks during saturation dives: a case report.","authors":"D M Stevens, B G Caras, E T Flynn, A J Dutka, J W Thorp, E D Thalmann","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>During research saturation dives at 5.0 and 5.5 atm abs, 2 divers developed an acute herniation of the nucleus pulposus of the L5-S1 intervertebral disk. In both cases the pain was severe enough to require intravenous morphine or intramuscular meperidine. Although the symptoms presented by these divers are frequently considered to be an indication for immediate surgical consultation, we decided that emergency decompression posed an unacceptable risk that decompression sickness (DCS) would develop in the region of acute inflammation. In both cases strict bedrest and medical therapy were performed at depth. In the first case, 12 h was spent at depth before initiating a standard U.S. Navy saturation decompression schedule with the chamber partial pressure of oxygen elevated to 0.50 atm abs. In the second case, a conservative He-N2-O2 trimix decompression schedule was followed to the surface. In both cases, no initial upward excursion was performed. The required decompression time was 57 h 24 min from 5.5 atm abs and 55 h 38 min from 5.0 atm abs. During the course of decompression, the first diver's neurologic exam improved and he required decreasing amounts of intravenous narcotic; we considered both to be evidence against DCS. The second diver continued to have pain and muscle spasm throughout decompression, however he did not develop motor, reflex, or sphincter abnormalities. Both divers have responded well to nonsurgical therapy.</p>","PeriodicalId":76778,"journal":{"name":"Undersea biomedical research","volume":"19 3","pages":"191-8"},"PeriodicalIF":0.0,"publicationDate":"1992-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12703425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbiologic hazards for inhabitants of deep diving hyperbaric complexes. 深潜高压复合体居民的微生物危害。

Undersea biomedical research Pub Date : 1992-05-01

A N Victorov, V K Ilyin, N A Policarpov, M P Bragina, V G Sobolevski, A D Syssoev, T J Norkina, I N Kornjushenkova

引用次数: 0

Comparison of two recompression profiles in treating experimental cerebral air embolism. 两种再压缩方式治疗实验性脑空气栓塞的比较。

Undersea biomedical research Pub Date : 1992-05-01

J J McDermott, A J Dutka, W A Koller, R R Pearson, E T Flynn

{"title":"Comparison of two recompression profiles in treating experimental cerebral air embolism.","authors":"J J McDermott, A J Dutka, W A Koller, R R Pearson, E T Flynn","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The standard treatment for cerebral arterial gas embolism (CAGE) is an initial recompression to 6 atm abs on air for 30 min followed by oxygen breathing at 2.8 and 1.9 atm abs. It has been suggested that initial recompression to 2.8 atm abs on O2 may be as beneficial, thus avoiding potential treatment complications associated with the deeper depth. To test this hypothesis, we measured the recovery of the somatosensory evoked potential (SEP) following air embolism in anesthetized, ventilated cats. Air was infused into the carotid artery in increments of 0.08 ml until the SEP amplitude was reduced to less than 10% of the baseline value for 15 min. Three groups were studied. A control group (n = 10) received no further treatment after SEP suppression. The second group (6 atm abs/HBO] (n = 8) was compressed to 6 atm abs on air for 30 min followed by O2 breathing at 2.8 atm abs for 100 min. The third group (HBO) (n = 8) was compressed to 2.8 atm abs on O2 for 130 min. The control group recovered 28.8 +/- 18.2% (mean +/- SD) of the baseline amplitude, whereas the 6 atm abs/HBO group recovered 48.6 +/- 22.6%, and the HBO group recovered 62.0 +/- 20.3%. An analysis of variance revealed that only the HBO group had significantly (P less than 0.01) better recovery than the control group. There was no significant difference in SEP recovery between the 2 treatment groups. These results suggest that treating CAGE at 2.8 atm abs with O2 is a viable alternative to the current therapy.</p>","PeriodicalId":76778,"journal":{"name":"Undersea biomedical research","volume":"19 3","pages":"171-85"},"PeriodicalIF":0.0,"publicationDate":"1992-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12762566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lidocaine as an adjunct to hyperbaric therapy in decompression illness: a case report. 利多卡因辅助高压氧治疗减压病1例报告。

Undersea biomedical research Pub Date : 1992-05-01

A Drewry, D F Gorman

引用次数: 0

Simulation of a microbial epidemic on a diving ship. 潜水船上微生物流行病的模拟。

Undersea biomedical research Pub Date : 1992-05-01

A B Syssoev, V K Ilyin, V I Putow

引用次数: 0

Urinary ANP, ADH, and electrolyte excretion during saturation-excursion diving to pressures equivalent to 250 and 300 m. 饱和漂移潜水至250和300 m压力时尿液ANP、ADH和电解质排泄。

Undersea biomedical research Pub Date : 1992-05-01

H Y Tao, H J Chen, H Zhang, J Guo, F K Rong

{"title":"Urinary ANP, ADH, and electrolyte excretion during saturation-excursion diving to pressures equivalent to 250 and 300 m.","authors":"H Y Tao, H J Chen, H Zhang, J Guo, F K Rong","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Four male divers were exposed to an environment of 26 and 31 atm abs He-O2 for 2 days. Urine was collected during the day (0700-1900 h) and at night (1900-0700 h) before (predive 1 atm abs air), during, and after (decompression and postdive 1 atm abs air) the exposure. Urine flow increased markedly and was mostly attributable to the urine flow during 1900-0700 h. The secretion of atrial natriuretic polypeptide (ANP) increased only at night during hyperbaria. On the other hand, the secretion of antidiuretic hormone (ADH) was suppressed, but increased during compression and the early phase of hyperbaric exposure before it decreased. Linear regression analysis showed that urinary excretion of ANP was correlated significantly with urine flow (r = 0.88, P less than 0.01) and that excretion of ADH negatively correlated with urine flow (r = -0.61, P less than 0.01). Urinary excretion of Na, Cl, Ca, and Mg increased significantly at night during hyperbaria, whereas there was no consistent change in the excretion of K and P. These results suggest that both stimulated ANP secretion and suppressed ADH secretion correlate with the increase of urine and that nocturia is mostly attributable to stimulated ANP secretion. We observed that urinary excretion of ANP increased significantly as early as during the compression phase, which suggested that ANP plays a decisive role in the early diuresis.</p>","PeriodicalId":76778,"journal":{"name":"Undersea biomedical research","volume":"19 3","pages":"159-69"},"PeriodicalIF":0.0,"publicationDate":"1992-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12703423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiofrequency energy for rewarming of cold extremities. 射频能量为寒冷的四肢再暖。

Undersea biomedical research Pub Date : 1992-05-01

J R Lloyd, R G Olsen

引用次数: 0

Decompression sickness risk in women. 女性患减压病的风险。

Undersea biomedical research Pub Date : 1992-05-01

A G Robertson

引用次数: 0

A hydrophobic oligolamellar lining to the vascular lumen in some organs. 在某些器官中通往血管腔的疏水寡层。

Undersea biomedical research Pub Date : 1992-03-01

B A Hills

引用次数: 0

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