Diving and hyperbaric medicine最新文献_第9页

How fit are military hyperbaric personnel after an asymptomatic or mild symptomatic COVID-19 infection? A retrospective study. 在无症状或轻度症状的新冠肺炎感染后，军事高压人员的健康状况如何？回顾性研究。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.120-128

Jan-Peter Schaap, Margy E Zuluaga Fernandez, Antoinette Houtkooper, Edwin L Endert, Pieter-Jan A M van Ooij

{"title":"How fit are military hyperbaric personnel after an asymptomatic or mild symptomatic COVID-19 infection? A retrospective study.","authors":"Jan-Peter Schaap, Margy E Zuluaga Fernandez, Antoinette Houtkooper, Edwin L Endert, Pieter-Jan A M van Ooij","doi":"10.28920/dhm53.2.120-128","DOIUrl":"10.28920/dhm53.2.120-128","url":null,"abstract":"Introduction: In the diving community there is a special need to know if asymptomatic or mild COVID-19 disease impacts the cardiopulmonary functioning of individuals with occupational exposure to extreme environments. To date, no controlled studies have been conducted comparing COVID-19-infected hyperbaric employees and non-COVID-19-infected peers in a military setting.Methods: Between June 2020 and June 2021, healthy, hyperbaric, military personnel aged between 18 and 54 years old, who had recovered from asymptomatic or subclinical COVID-19 disease at least one month earlier, were analysed. Non-COVID-infected peers with medical assessments during the same period were used as the control group. Somatometry, spirometry, VO₂ max, and DLCO were measured for each group.Results: No clinically relevant differences in somatometry, lung function tests, and exercise testing were found between the COVID-19 group and the controls. However, the percentage of individuals with a decrease in estimated VO2-max of 10% or more was significantly greater in the COVID group than in the control group (24 vs. 7.8%, P = 0.004).Conclusions: After asymptomatic or mild symptomatic COVID-19 infections, military hyperbaric employees are as fit as those who had not encountered COVID-19. As this research was based on a military population, it cannot be extrapolated to a nonmilitary population. Further studies in nonmilitary populations are necessary to determine the medical relevance of the present findings.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"120-128"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10584392/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9692075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effectiveness of hyperbaric chamber ventilation. 高压舱通气的有效性。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.85-91

Lyubisa Matity, Francois Burman, Jacek Kot, Joseph Caruana

{"title":"Effectiveness of hyperbaric chamber ventilation.","authors":"Lyubisa Matity, Francois Burman, Jacek Kot, Joseph Caruana","doi":"10.28920/dhm53.2.85-91","DOIUrl":"10.28920/dhm53.2.85-91","url":null,"abstract":"Introduction: Hyperbaric chamber ventilation (HCV) refers to the intentional introduction of fresh gas, whether air, oxygen, or heliox, into a pressurised hyperbaric chamber in order to remove stale or otherwise compromised gas. The minimum required continuous HCV rate is usually determined by mathematical models derived from the contaminant mass balance within a well-stirred compartment. Non-uniform contaminant distribution patterns inside a hyperbaric chamber could emerge and invalidate the predictions of well-stirred models.Methods: Contaminant distribution was investigated inside a clinical hyperbaric chamber with the aim of comparing well-stirred model predictions with the actual contaminant concentration measurements.Results: Local ventilation effectiveness inside a clinical hyperbaric chamber may be compromised, leading to higher contaminant concentration values compared to the predictions of a mathematical model with a well-stirred assumption.Conclusions: A well-stirred assumption in mathematical models is a useful simplification that allows reasonably accurate estimates of HCV requirements. However, local ventilation effectiveness values in a particular hyperbaric chamber might vary, with the potential for hazardous contaminant accumulation in under-ventilated zones.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"85-91"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10586871/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10067067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hyperbaric oxygen and treadmill exercise partially prevented bone loss and bone microarchitecture deterioration in ovariectomized rats. 高压氧和跑步机运动部分预防了去卵巢大鼠的骨丢失和骨微结构恶化。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.111-119

Xiaoling Peng, Binli Gao, Xiangxiu Wang, Xiaohong Qin, Mei Peng, Xianrong Zeng

{"title":"Hyperbaric oxygen and treadmill exercise partially prevented bone loss and bone microarchitecture deterioration in ovariectomized rats.","authors":"Xiaoling Peng, Binli Gao, Xiangxiu Wang, Xiaohong Qin, Mei Peng, Xianrong Zeng","doi":"10.28920/dhm53.2.111-119","DOIUrl":"10.28920/dhm53.2.111-119","url":null,"abstract":"Introduction: Previous studies have demonstrated the beneficial effects of treadmill exercise (EX) on osteoporosis, and of hyperbaric oxygen (HBO) on osteoblast and osteoclast formation in vitro. We investigated the effects of HBO and the combination of HBO and EX on osteoporosis in ovariectomized rats.Methods: Forty 3-month-old female Sprague-Dawley rats were randomly divided into 5 groups (n = 8): a sham control group (Control); an ovariectomy group; an ovariectomy with treadmill exercise treatment group; an ovariectomy with HBO treatment group; and an ovariectomy with HBO treatment combined with treadmill exercise group. The HBO exposures were 203 kPa, 85-90% O₂, 90 min and the exercise regimen was 20 m·min⁻¹, 40 min·day¹, 5° slope. Both treatments were administered once daily, five days a week for 12 weeks until the rats were sacrificed.Results: All three treatments (HBO, exercise, and both combined) significantly promoted the expression of the osteoblast-related gene and oxidative metabolism-related gene (PGC-1α). They also exerted significant inhibitory effects on the osteoclast-related mRNA expression (RANKL) and bone resorption marker CTX-I. Additionally, exercise and the combination exercise-HBO treatment increased serum superoxide dysmutase (SOD) and sclerostin expression. No significant between-group difference was observed.Conclusions: Hyperbaric oxygen, exercise, and the combination ameliorated bone microarchitecture deterioration and ovariectomy-induced bone loss in rats, and these inhibitory effects may be associated with the increased SOD and up-regulated PGC-1α.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"111-119"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10584393/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10067069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Successful hyperbaric oxygen treatment of a patient with a HeartMate III left ventricular assist device. 使用HeartMate III左心室辅助装置成功对一名患者进行高压氧治疗。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.147-150

Arun Ilancheran, Ian Millar, Theo Tsouras

引用次数: 0

Successful delayed treatment of acute glans penis ischaemia after adult circumcision: a case report. 成功延迟治疗成人包皮环切术后急性阴茎头缺血：一例报告。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.151-154

Kenneth Lo, Darren Katz, Vincent Chan, Ian Miler

引用次数: 0

Rebreather Forum Four consensus statements. 重建论坛四项共识声明。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.142-146

Simon J Mitchell, Neal W Pollock

{"title":"Rebreather Forum Four consensus statements.","authors":"Simon J Mitchell, Neal W Pollock","doi":"10.28920/dhm53.2.142-146","DOIUrl":"10.28920/dhm53.2.142-146","url":null,"abstract":"Closed circuit rebreathers have been widely adopted by technical divers as tools for reducing gas consumption and extending depth and duration capabilities. Rebreathers are technologically complex with many failure points, and their use appears associated with a higher accident rate than open circuit scuba. Rebreather Forum Four (RF4) was held in Malta in April 2023 attracting approximately 300 attendees and representatives of multiple manufacturers and training agencies. Over two and a half days a series of lectures was given by influential divers, engineers, researchers and educators on topics of contemporary relevance to rebreather diving safety. Each lecture was followed by a discussion session with audience participation. Potential consensus statements were drafted by the authors (SJM and NWP) during the course of the meeting. These were worded to be confluent with some important messages emerging from the presentations and subsequent discussions. The statements were presented one by one in a half-day plenary session of participants, and discussion was invited on each. After discussion and any necessary revision, the participants voted on whether to adopt the statement as a position of the forum. A clear majority was required for acceptance. Twenty-eight statements embracing thematic areas designated 'safety', 'research', 'operational issues', 'education and training', and 'engineering' were adopted. Those statements are presented along with contextualising narrative where necessary. The statements may help shape research and teaching initiatives, and research and development strategies over subsequent years.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"142-146"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10584388/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9692077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compressed gas diving fatalities in Australian waters 2014 to 2018. 2014年至2018年，澳大利亚水域发生压缩气体潜水死亡事件。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.76-84

John Lippmann, Christopher Lawrence, Andrew Fock

{"title":"Compressed gas diving fatalities in Australian waters 2014 to 2018.","authors":"John Lippmann, Christopher Lawrence, Andrew Fock","doi":"10.28920/dhm53.2.76-84","DOIUrl":"10.28920/dhm53.2.76-84","url":null,"abstract":"Introduction: This study aimed to investigate compressed gas diving deaths in Australia from 2014-2018 and make comparison to those from 2001-2013 to identify ongoing problems and assess countermeasures.Methods: Media reports and the National Coronial Information System were searched to identify scuba diving deaths for 2014-2018, inclusive. Data were extracted from the witness and police reports, medical histories, and autopsies. An Excel® database was created and a chain of events analysis conducted. Comparisons were made with the earlier report.Results: Forty-two fatalities were identified, 38 using scuba and four using surface-supplied breathing apparatus involving 30 males and 12 females. The mean age of victims was 49.7 years, six years higher than the previous cohort. Fifty-four percent were obese. Six victims were unqualified, three were under instruction and at least 28 were experienced divers, significantly more than in the previous cohort. Health-related predisposing factors, predominantly obesity and cardiac-related, were identified as likely contributory to 26 incidents, and planning shortcomings to at least 22 deaths. One-third of the disabling conditions were primary drowning and one-quarter were cardiac. Three divers died subsequent to carbon monoxide poisoning and three likely from immersion pulmonary oedema.Conclusions: Advancing age, obesity and the associated cardiac disease have become increasingly prevalent in diving fatalities and the need for appropriate assessment of fitness to dive is evident.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"76-84"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10584389/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9692078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Technical validation of the EMMA capnometer under hyperbaric conditions. 高压条件下EMMA二氧化碳计的技术验证。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.100-110

Alicia Tucker, David Smart

{"title":"Technical validation of the EMMA capnometer under hyperbaric conditions.","authors":"Alicia Tucker, David Smart","doi":"10.28920/dhm53.2.100-110","DOIUrl":"10.28920/dhm53.2.100-110","url":null,"abstract":"Introduction: End-tidal carbon dioxide (ETCO2) monitoring is essential for monitoring intubated critical care patients, yet its use in hyperbaric environments can be problematic. We postulated that the EMMA mainstream capnometer may function accurately under hyperbaric conditions.Methods: Stage 1. The EMMA mainstream capnometer was tested at 101 kPa against a reference side-stream capnometer, Philips IntelliVue M3015B microstream, using 10 customised reference gases of various carbon dioxide (CO₂) concentrations (2.47%-8.09%, or 18.5-60.7 mmHg at 101 kPa) in either air or oxygen. Stage 2. The functionality and accuracy of the EMMA capnometer was tested under hyperbaric conditions, 121-281 kPa, using the same test gases.Results: At 101 kPa, the EMMA capnometer measured CO₂ at levels lower than expected (mean of differences = -2.5 mmHg (95% CI -2.1 to -2.9, P < 0.001)). The Philips capnometer measured CO₂ more closely to expected CO₂ (mean of differences = -1.1 mmHg (95% CI -0.69 to -1.4, P < 0.001). Both devices demonstrated a significant linear relationship with expected CO₂. The EMMA capnometer functioned up to the maximum test pressure (281 kPa). The device over-read CO₂ measurements at pressures > 141 kPa. Although variance increased at pressures in the therapeutic range for hyperbaric treatments, a significant linear relationship between expected and EMMA measured CO₂ was demonstrated. The EMMA capnometer tolerated pressures to 281 kPa, but its display was limited to CO₂ < 99 mmHg.Conclusions: This study validated EMMA capnometer function to 281 kPa in the hyperbaric environment. The device over-read CO₂ measurements at pressures >141 kPa, however there was a linear relationship between expected and measured CO₂. The EMMA capnometer may be clinically useful for monitoring expired CO₂ in patients undergoing hyperbaric oxygen treatment.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"100-110"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10584396/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10048471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining best practice for technical assessment of hookah surface supply diving equipment during diving fatality investigation. 确定潜水死亡调查期间水烟表面供应潜水设备技术评估的最佳实践。

IF 0.8 4区医学

Diving and hyperbaric medicine Pub Date : 2023-06-30 DOI: 10.28920/dhm53.2.92-99

Darren Meehan, David Smart, John Lippmann

{"title":"Determining best practice for technical assessment of hookah surface supply diving equipment during diving fatality investigation.","authors":"Darren Meehan, David Smart, John Lippmann","doi":"10.28920/dhm53.2.92-99","DOIUrl":"10.28920/dhm53.2.92-99","url":null,"abstract":"Introduction: This study aimed to develop a standard process and checklist for technical investigation of hookah diving equipment and apply it to Tasmanian hookah fatality investigations from the last 25 years.Methods: A literature search was undertaken to identify technical reports and equipment investigations associated with diving accidents. The information was assimilated to create a process and checklist for specifically assessing the hookah apparatus. The checklist was then applied in a gap analysis of Tasmanian hookah diving fatality technical reports from 1995 to 2019.Results: As no papers specifically describing technical evaluation of hookah equipment were identified, references evaluating scuba equipment were used to create a hookah technical assessment process incorporating unique features of the hookah. Features included: owner responsibility for air quality; maintenance, function; exhaust proximity to air intake; reservoir volume; output non-return valves; line pressure; sufficiency of supply; entanglement; hose severance risk; gas supply failure and hosing attachment to the diver. Seven hookah diving deaths occurred in Tasmania (1995-2019) of which three had documented technical assessment. Gap analysis identified inconsistent structure between reports with variability in the case descriptors. Missing technical data included: overview of the hookah systems; accessories; weights; how the apparatus was worn by the diver; compressor suitability; assessment of hookah function; breathing gas output and exhaust position relative to air intake.Conclusions: The study demonstrated a need to standardise technical reporting of hookah equipment after diving accidents. The checklist generated may serve as a resource for future hookah assessments and inform strategies for preventing future hookah accidents.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 2","pages":"92-99"},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10586870/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10048475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The risk of decompression illness in breath-hold divers: a systematic review. 屏气潜水员患减压病的风险:一项系统综述。

IF 0.9 4区医学

Diving and hyperbaric medicine Pub Date : 2023-03-31 DOI: 10.28920/dhm53.1.31-41

S Lesley Blogg, Frauke Tillmans, Peter Lindholm

{"title":"The risk of decompression illness in breath-hold divers: a systematic review.","authors":"S Lesley Blogg, Frauke Tillmans, Peter Lindholm","doi":"10.28920/dhm53.1.31-41","DOIUrl":"https://doi.org/10.28920/dhm53.1.31-41","url":null,"abstract":"Introduction: Breath-hold (BH) diving has known risks, for example drowning, pulmonary oedema of immersion and barotrauma. There is also the risk of decompression illness (DCI) from decompression sickness (DCS) and/or arterial gas embolism (AGE). The first report on DCS in repetitive freediving was published in 1958 and from then there have been multiple case reports and a few studies but no prior systematic review or meta-analysis.Methods: We undertook a systematic literature review to identify articles available from PubMed and Google Scholar concerning breath-hold diving and DCI up to August 2021.Results: The present study identified 17 articles (14 case reports, three experimental studies) covering 44 incidences of DCI following BH diving.Conclusions: This review found that the literature supports both DCS and AGE as potential mechanisms for DCI in BH divers; both should be considered a risk for this cohort of divers, just as for those breathing compressed gas while underwater.","PeriodicalId":11296,"journal":{"name":"Diving and hyperbaric medicine","volume":"53 1","pages":"31-41"},"PeriodicalIF":0.9,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10106275/pdf/DHM-53-31.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9369411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0