{"title":"Complications After Covid-19 Infection In Singapore Military Divers: A Retrospective Cohort Study.","authors":"Nah Chung Wei, Kwek Wei Ming","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Studies suggest that COVID-19 infections may have longer-term and more significant complications, even with mild or absent symptoms. This may predispose divers to pulmonary barotrauma, arterial gas embolisms, and reduced exercise tolerance, and impact physical and cognitive performance during diving. Military diving is physically, physiologically, and psychologically taxing on the individual. This study aims to assess the incidence of complications after COVID-19 infections in a cohort of active military divers and the incidence of diving-related injuries such as decompression sickness and barotrauma following recovery from acute COVID-19 infections. A single-center, retrospective cohort study of complications after COVID-19 infections was done in a cohort of the Republic of Singapore Navy (RSN) Naval Diving Unit (NDU) Divers and involved the collection of retrospective data for 329 military divers who were diagnosed with COVID-19 infection from 25 Mar 2020 and 13 Feb 2023. We found no clinical or subclinical complications after COVID-19 infection in our fully vaccinated, low-risk population of NDU divers after asymptomatic or mild COVID-19 infection. There were also no incidences of diving-related injuries related to COVID-19 after recovery from the acute illness. Based on the study results, it is recommended that all military divers with asymptomatic or mild COVID-19 infections return to military diving activities immediately after recovery from acute COVID-19 infection with resolution of symptoms. As existing guidelines recommend, divers with moderate to critical COVID-19 infection should be reviewed by a diving physician and undergo necessary investigations before returning to military diving.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 3","pages":"221-229"},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Stroke on ECG: a cerebral T-wave change secondary to acute carbon monoxide poisoning.","authors":"Xin Xiao, Xiuna Jing, Yun Zhao, Fei Yao, Qing Sun","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In clinical management of carbon monoxide (CO) poisoning, serum cardiac enzyme biomarkers and electrocardiogram (ECG) are both highly recommended emergency check-ups to evaluate myocardial injuries. Medical imaging - including head CT or MRI - are not routine for CO poisoning emergency management. We herein report on a comatose patient who was diagnosed with cerebral infarction secondary to 24 hours previous acute CO poisoning, warned by a typical cerebral-type T waves on ECG in advance, and confirmed by a head MRI. Fortunately, the patient made a full recovery based on a timely treatment with medications and hyperbaric oxygen (HBO<sub>2</sub>) therapy. We would like to propose that a vital, stable, conscious CO poisoning patient who remains a higher risk for hemorrhagic or ischemic stroke should be closely monitored for potential neurological abnormalities, and a continuous ECG monitoring should be reinforced throughout the treatment. A head MRI or CT is a priority in evaluating the secondary cerebral stroke and should be arranged immediately in the event of an abnormal ECG or if unusual new symptoms are apparent.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 3","pages":"237-240"},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mass Carbon Monoxide Poisoning on a Train in Italy, March 1944. History Reconstructed.","authors":"Neil B Hampson","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>World War II was approaching its end in Italy in 1944 when one of the worst train disasters in world history occurred near the small town of Balvano in the Apennine Mountains. The train did not derail or crash into something as in most major train disasters. Instead, it entered a mountainous railway tunnel, and when it emerged, over 500 passengers were dead from carbon monoxide poisoning. The event was not allowed to be publicized for almost two decades. This manuscript reconstructs the story of possibly the most significant incident of carbon monoxide mortality ever recorded.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 3","pages":"247-251"},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of hyperbaric oxygen therapy on diabetes-related oral complications.","authors":"Busra Dilara Altun, Selin Gamze Sümen, Melisa Öçbe, Asim Dumlu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Background: </strong>Diabetes Mellitus is a chronic disease characterized by uncontrolled blood sugar levels, which lead to end-organ damage. While the diagnosis and treatment of its complications have been extensively studied, the effect of Hyperbaric Oxygen Therapy (HBO<sub>2</sub>) on diabetes-related oral complications remains unexplored.</p><p><strong>Aim: </strong>This prospective clinical study aims to investigate the effect of HBO<sub>2</sub> on diabetes-related oral complications.</p><p><strong>Methods: </strong>Twenty patients diagnosed with diabetic foot ulcers and scheduled for HBO<sub>2</sub> were included in this study. We recorded stimulated and unstimulated saliva pH, buffering capacity, flow rate, and subjective symptoms such as dry mouth, halitosis, taste loss, difficulty swallowing, and clinical examination findings before HBO<sub>2</sub> and after the 21st session.</p><p><strong>Results: </strong>Upon comparing the findings, we observed a significant decrease in dry mouth and halitosis, periodontal disease severity, and healing of candida-related stomatitis and angular cheilitis. Despite not reaching statistical significance for other saliva parameters, the unstimulated salivary flow rate increased to normal limits (0.3-0.4 ml/min) in 6 out of 8 patients with a flow rate of less than 0.25 ml/min.</p><p><strong>Conclusion: </strong>Our study investigated the effect of HBO<sub>2</sub> on diabetes-related oral complications for the first time, highlighting symptomatic relief for dry mouth and halitosis. Although our results are insufficient to report a definitive benefit, they underscore the need for further research on the oral health effects of HBO<sub>2</sub>.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"101-106"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Donald Lamont, Andrew Colvin, Adrian Heili, Tony Ridley, Roy Slocombe, Jurg Wendling
{"title":"Advanced high pressure hyperbaric techniques in tunnelling.","authors":"Donald Lamont, Andrew Colvin, Adrian Heili, Tony Ridley, Roy Slocombe, Jurg Wendling","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Work in compressed air and diving are both occupational activities that have been around since the mid-19th century, and those undertaking their work under elevated pressure. Meeting the demand to go to \"higher pressure for longer\" in tunneling has lagged in diving, but both activities have found it necessary to adopt mixed gas breathing and saturation exposure techniques. This paper explains how work in hyperbaric conditions at high pressure is undertaken in tunneling and is illustrated by the hyperbaric activity likely to be involved in constructing a large-diameter road tunnel below a body of water such as an estuary. It also explores the practical differences between work in compressed air and diving.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"159-171"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
John J Feldmeier, John P Kirby, Helen B Gelly, Marc Robins, John Peters, Peter Gruhn, Sarmistha Pal
{"title":"Controlled CMS Data Demonstrates a Cost and Clinical Advantage for Hyperbaric Oxygen for Radiation Cystitis.","authors":"John J Feldmeier, John P Kirby, Helen B Gelly, Marc Robins, John Peters, Peter Gruhn, Sarmistha Pal","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Introduction: </strong>Increasing cancer survivorship, in part due to new radiation treatments, has created a larger population at risk for delayed complications of treatment. Radiation cystitis continues to occur despite targeted radiation techniques.</p><p><strong>Materials and methods: </strong>To investigate value-based care applying hyperbaric oxygen (HBO<sub>2</sub>) to treat delayed radiation cystitis, we reviewed public-access Medicare data from 3,309 patients from Oct 1, 2014, through Dec 31, 2019. Using novel statistical modeling, we compared cost and clinical effectiveness in a hyperbaric oxygen group to a control group receiving conventional therapies.</p><p><strong>Results: </strong>Treatment in the hyperbaric group provided a 36% reduction in urinary bleeding, a 78% reduced frequency of blood transfusion for hematuria, a 31% reduction in endoscopic procedures, and fewer hospitalizations when study patients were compared to control. There was a 53% reduction in mortality and reduced unadjusted Medicare costs of $5,059 per patient within the first year after completion of HBO<sub>2</sub> treatment per patient. When at least 40 treatments were provided, cost savings per patient increased to $11,548 for the HBO<sub>2</sub> study group compared to the control group. This represents a 37% reduction in Medicare spending for the HBO<sub>2</sub>-treated group. We also validate a dose-response curve effect with a complete course of 40 or more HBO<sub>2</sub> treatments having better clinical outcomes than those treated with fewer treatments.</p><p><strong>Conclusion: </strong>These data support previous studies that demonstrate clinical benefits now with cost- effectiveness when adjunctive HBO<sub>2</sub> treatments are added to routine interventions. The methodology provides a comparative group selected without bias. It also provides validation of statistical modeling techniques that may be valuable in future analysis, complementary to more traditional methods.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"145-157"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kinjal Sethuraman, Michael Tom, Kin Wah Chew, Jonathan Romero-Casilla, Kevin Hardy
{"title":"Quantification of referrals received at two emergency-capable hyperbaric medicine centers.","authors":"Kinjal Sethuraman, Michael Tom, Kin Wah Chew, Jonathan Romero-Casilla, Kevin Hardy","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Emergency hyperbaric oxygen treatment capability is limited in the United States, and there is little documentation of calls received by centers available 24 hours a day, seven days a week, 365 days a year. Our study aimed to calculate the number of calls received for urgent hyperbaric oxygen (HBO<sub>2</sub>). We logged calls from two HBO<sub>2</sub> chambers on the East Coast of the United States that serve a densely populated region in 2021. The total number of emergency calls was 187 at the University of Maryland (UMD) and 127 at the University of Pennsylvania (UPenn). There were calls on 180/365 (46%) days during the study period at UMD and 239/365 (63%) days at UPenn. The most common indication was carbon monoxide toxicity. The peak month of calls was March. Emergency HBO<sub>2</sub> calls are common, and more centers must accept emergency cases. Data from geographically diverse centers would add generalizability to these results and capture more diving-related emergencies.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"97-100"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Matthew Kelly, Helen Gelly, Owen O'Neill, Dag Shapshak
{"title":"UHMS Position Statement: Physician's Duties in Hyperbaric Medicine - 99183.","authors":"Matthew Kelly, Helen Gelly, Owen O'Neill, Dag Shapshak","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Introduction: </strong>The Undersea and Hyperbaric Medical Society (UHMS) is at the forefront of advancing medical knowledge and promoting patient safety in the field of hyperbaric medicine. In the dynamic landscape of healthcare, physicians' critical role in overseeing hyperbaric oxygen treatment (HBO<sub>2</sub>) cannot be overstated. This position statement aims to underscore the significance of physician involvement in delivering HBO<sub>2</sub> and articulate UHMS's commitment to maintaining the highest standards of care and safety for patients undergoing hyperbaric treatments.</p><p><strong>Abstract: </strong>Hyperbaric oxygen treatment demands a meticulous approach to patient management. As the complexity of hyperbaric patients continues to evolve, the direct oversight of qualified physicians becomes paramount to ensuring optimal patient outcomes and safeguarding against potential risks. In this statement, we outline the key reasons physician involvement is essential in every facet of HBO<sub>2</sub>, addressing the technical intricacies of the treatment and the broader spectrum of patient care.</p><p><strong>Rationale: </strong>Physician oversight for hyperbaric oxygen treatment is rooted in the technical complexities of the treatment and the broader responsibilities associated with clinical patient care. The responsibilities outlined below delineate services intrinsic to the physician's duties for treating patients undergoing hyperbaric oxygen treatments.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"v-viii"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Omar López-Rebenaque, Luis Solís-Ferrer, José Fierro-Marrero, Francisco de Asís-Fernández
{"title":"Acute effects of apnea bouts on hemoglobin concentration and hematocrit: a systematic review and meta-analysis.","authors":"Omar López-Rebenaque, Luis Solís-Ferrer, José Fierro-Marrero, Francisco de Asís-Fernández","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to systematically analyze the existing literature and conduct a meta-analysis on the acute effects of apnea on the hematological response by assessing changes in hemoglobin (Hb) concentration and hematocrit (Hct) values.</p><p><strong>Methods: </strong>Searches in Pubmed, The Cochrane Library, and Web of Science were carried out for studies in which the main intervention was voluntary hypoventilation, and Hb and Hct values were measured. Risk of bias and quality assessments were performed.</p><p><strong>Results: </strong>Nine studies with data from 160 participants were included, involving both subjects experienced in breath-hold sports and physically active subjects unrelated to breath-holding activities. The GRADE scale showed a \"high\" confidence for Hb concentration, with a mean absolute effect of 0.57 g/dL over control interventions. \"Moderate\" confidence appeared for Hct, where the mean absolute effect was 2.45% higher over control interventions. Hb concentration increased to a greater extent in the apnea group compared to the control group (MD = 0.57 g/dL [95% CI 0.28, 0.86], Z = 3.81, p = 0.0001) as occurred with Hct (MD = 2.45% [95% CI 0.98, 3.93], Z = 3.26, p = 0.001).</p><p><strong>Conclusions: </strong>Apnea bouts lead to a significant increase in the concentration of Hb and Hct with a high and moderate quality of evidence, respectively. Further trials on apnea and its application to different settings are needed.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"173-184"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Youichi Yanagawa, Hiromichi Ohsaka, Shoichiro Yatsu, Satoru Suwa
{"title":"Acute aortic dissection during scuba diving.","authors":"Youichi Yanagawa, Hiromichi Ohsaka, Shoichiro Yatsu, Satoru Suwa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A 60-year-old man with hypertension and dyslipidemia complained of chest pain upon ascending from a maximum depth of 27 meters while diving. After reaching the shore, his chest pain persisted, and he called an ambulance. When a physician checked him on the doctor's helicopter, his electrocardiogram (ECG) was normal, and there were no bubbles in his inferior vena cava or heart on a portable ultrasound examination. The physician still suspected that he had acute coronary syndrome instead of decompression illness; therefore, he was transported to our hospital. After arrival at the hospital, standard cardiac echography showed a flap in the ascending aorta. Immediate enhanced computed tomography revealed Stanford type A aortic dissection. The patient obtained a survival outcome after emergency surgery. To our knowledge, this is the first reported case of aortic dissection potentially associated with scuba diving. It highlights the importance of considering aortic dissection in patients with sudden-onset chest pain during physical activity. In addition, this serves as a reminder that symptoms during scuba diving are not always related to decompression. This report also suggests the usefulness of on-site ultrasound for the differential diagnosis of decompression sickness from endogenous diseases that induce chest pain. Further clinical studies of this management approach are warranted.</p>","PeriodicalId":49396,"journal":{"name":"Undersea and Hyperbaric Medicine","volume":"51 2","pages":"185-187"},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}