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https://www.readbyqxmd.com/read/29450499/otorhinolaryngology-and-diving-part-2-otorhinolaryngological-fitness-for-compressed-gas-scuba-diving-a-review
#1
Matt Lechner, Liam Sutton, Jonathan M Fishman, David M Kaylie, Richard E Moon, Liam Masterson, Christoph Klingmann, Martin A Birchall, Valerie J Lund, John S Rubin
Importance: Self-contained underwater breathing apparatus (scuba) diving has become increasingly popular with millions of people diving each year. Otorhinolaryngologists are often consulted either by patients or diving physicians regarding fitness to dive, and at present, the guidelines do not provide comprehensive information regarding the evaluation of this patient cohort. The aim of this review is to provide a comprehensive overview of existing otorhinolaryngological guidelines for fitness to dive recreationally...
February 15, 2018: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29450472/otorhinolaryngology-and-diving-part-1-otorhinolaryngological-hazards-related-to-compressed-gas-scuba-diving-a-review
#2
Matt Lechner, Liam Sutton, Jonathan M Fishman, David M Kaylie, Richard E Moon, Liam Masterson, Christoph Klingmann, Martin A Birchall, Valerie J Lund, John S Rubin
Importance: Scuba diving is becoming increasingly popular. However, scuba diving is associated with specific risks; 80% of adults and 85% of juvenile divers (aged 6-17 years) have been reputed to have an ear, nose, or throat complaint related to diving at some point during their diving career. Divers frequently seek advice from primary care physicians, diving physicians, and otorhinolaryngologists, not only in the acute setting, but also related to the long-term effects of diving. Observations: The principles underpinning diving-related injuries that may present to the otorhinolaryngologist rely on gas volume and gas saturation laws, and the prevention of these injuries requires both that the diver is skilled and that their anatomy allows for pressure equalization between the various anatomical compartments...
February 15, 2018: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29445874/new-evidence-of-predation-on-humans-by-cookiecutter-sharks-in-kauai-hawaii
#3
Agathe Ribéreau-Gayon, David O Carter, Stephanie Regan
The feeding patterns of species of large sharks on human corpses are well documented in the literature however, that of smaller sharks are less known. This may introduce uncertainty in the medicolegal conclusions. For that reason, accurate identification of patterns of shark predation is very relevant, specifically in areas bordered by the sea. In the case described here, an unidentified lesion was noted on the body of a victim of a scuba diving accident off the island of Kauai, in Hawaii. The aim of this study was to identify the origin of the lesion and investigate its potential to inform on the context of death and/or decomposition...
February 14, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29334806/effect-of-scuba-diving-on-the-oxidant-antioxidant-status-sirt1-and-sirt3-expression-in-recreational-divers-after-a-winter-nondive-period
#4
Antonija Perović, Sandra Sobočanec, Sanja Dabelić, Tihomir Balog, Jerka Dumić
The aim of this study was to examine the effects of scuba diving on oxidative damage markers in erythrocytes and plasma, antioxidant system in peripheral blood mononuclear cells (PBMCs), as well as sirtuin 1 (SIRT1) and sirtuin 3 (SIRT3) gene expressions in recreational divers after a winter nondive period (at least 5 months). For that purpose, 17 male recreational divers performed an immersion at a depth of 30 m for 30 min. Blood samples were collected immediately before and after diving, 3 and 6 h after diving...
January 15, 2018: Free Radical Research
https://www.readbyqxmd.com/read/29306625/epidemiology-of-morbidity-and-mortality-in-us-and-canadian-recreational-scuba-diving
#5
P Buzzacott, D Schiller, J Crain, P J Denoble
OBJECTIVES: This study investigates morbidity and mortality suffered by divers in the USA and Canada. STUDY DESIGN: Prospectively recruited probability-weighted sample for estimating the national burden of injury and a weighted retrospective survey for estimating exposure. METHODS: The National Electronic Surveillance System and Canadian Hospitals Injury Reporting and Prevention Program (CHIRPP) were searched for scuba diving injuries. The Divers Alert Network diving fatality database was searched for deaths, and Sports and Fitness Industry Association estimates for diving were obtained from annual surveys...
January 4, 2018: Public Health
https://www.readbyqxmd.com/read/29299780/the-key-roles-of-negative-pressure-breathing-and-exercise-in-the-development-of-interstitial-pulmonary-edema-in-professional-male-scuba-divers
#6
Olivier Castagna, Jacques Regnard, Emmanuel Gempp, Pierre Louge, François Xavier Brocq, Bruno Schmid, Anne-Virginie Desruelle, Valentin Crunel, Adrien Maurin, Romain Chopard, David Hunter MacIver
BACKGROUND: Immersion pulmonary edema is potentially a catastrophic condition; however, the pathophysiological mechanisms are ill-defined. This study assessed the individual and combined effects of exertion and negative pressure breathing on the cardiovascular system during the development of pulmonary edema in SCUBA divers. METHODS: Sixteen male professional SCUBA divers performed four SCUBA dives in a freshwater pool at 1 m depth while breathing air at either a positive or negative pressure both at rest or with exercise...
January 3, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29281198/alternobaric-vertigo-and-facial-baroparesis-caused-by-scuba-diving-and-relieved-by-chewing-pineapple-a-case-report
#7
Adam Bender-Heine, Zachary W Dillard, Matthew J Zdilla
Equalization of middle ear pressure is an important consideration for scuba divers. When middle ear pressure is asymmetric, a diver may experience alternobaric vertigo. Moreover, individuals with an underlying temporal bone dehiscence are predisposed to facial baroparesis. An understanding on behalf of fellow divers and emergency responders to recognize and differentiate facial baroparesis from decompression illness is critical. Misdiagnosis may lead to inappropriate treatment or unwarranted stoppage of diving...
November 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29279462/recurrence-of-spontaneous-pneumothorax-is-not-associated-with-allegedly-risk-prone-lifestyle-conduct
#8
Volker Steger, Ulrike Sostheim, Marcus Leistner, Thorsten Walles
PURPOSE: Spontaneous pneumothorax (PNTX) is a common disease frequently operated at specialized thoracic surgery units. Videothoracoscopic surgery (VATS) has become the standard for treatment and recurrence prevention. While there is broad consensus regarding indications and techniques of PNTX surgery, postoperative risks and consecutive patient behavioral advice have not been sufficiently elucidated. METHODS: Single-center cohort analysis of 641 patients operated for primary PNTX by VATS over 10 years...
December 27, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29241231/influence-of-repetitive-diving-in-freshwater-on-pressure-equalization-and-eustachian-tube-function-in-recreational-scuba-divers
#9
Stefanie Jansen, Manuela Boor, Moritz F Meyer, Eberhard D Pracht, Ruth Volland, Heinz D Klünter, Karl-Bernd Hüttenbrink, Dirk Beutner, Maria Grosheva
INTRODUCTION: We investigated the effect of repetitive pressure exposure during freshwater dives on Eustachian tube function and the middle ear, assessed by the Eustachian tube function test (ETFT). METHODS: This prospective observational cohort study included 23 divers over three consecutive days of diving in freshwater lakes in Nordhausen, Germany. Participants underwent otoscopy and ETFT before the first dive, between each dive and after the last dive. ETFT included regular tympanometry (R-tymp), tympanometry after Valsalva (V-tymp) and after swallowing (S-tymp)...
December 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/29241230/influence-of-repetitive-diving-in-saltwater-on-pressure-equalization-and-eustachian-tube-function-in-recreational-scuba-divers
#10
Moritz F Meyer, Manuela Boor, Stefanie Jansen, Eberhard D Pracht, Moritz Felsch, Heinz D Klünter, Karl-Bernd Hüttenbrink, Dirk Beutner, Maria Grosheva
INTRODUCTION: We investigated in a prospective, observational trial the feasibility of using the Eustachian tube function test (ETFT) to measure the effect of repetitive pressure exposure during open seawater dives on Eustachian tube function. METHODS: The study included 28 adult divers during six consecutive days of diving in the Red Sea. Participants underwent otoscopy and ETFT before the first dive, between each dive and after the last dive. ETFT included regular tympanometry (R-tymp), tympanometry after Valsalva (V-tymp) and after swallowing (S-tymp)...
December 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/29220368/increased-sediment-load-during-a-large-scale-dam-removal-changes-nearshore-subtidal-communities
#11
Stephen P Rubin, Ian M Miller, Melissa M Foley, Helen D Berry, Jeffrey J Duda, Benjamin Hudson, Nancy E Elder, Matthew M Beirne, Jonathan A Warrick, Michael L McHenry, Andrew W Stevens, Emily F Eidam, Andrea S Ogston, Guy Gelfenbaum, Rob Pedersen
The coastal marine ecosystem near the Elwha River was altered by a massive sediment influx-over 10 million tonnes-during the staged three-year removal of two hydropower dams. We used time series of bathymetry, substrate grain size, remotely sensed turbidity, scuba dive surveys, and towed video observations collected before and during dam removal to assess responses of the nearshore subtidal community (3 m to 17 m depth). Biological changes were primarily driven by sediment deposition and elevated suspended sediment concentrations...
2017: PloS One
https://www.readbyqxmd.com/read/29214659/2d-speckle-tracking-echocardiography-of-the-right-ventricle-free-wall-in-scuba-divers-after-single-open-sea-dive
#12
Zora Susilovic-Grabovac, Ante Obad, Darko Duplančić, Ivana Banić, Denise Brusoni, Piergiuseppe Agostoni, Ivica Vuković, Zeljko Dujic, Darija Bakovic
The presence of circulating gas bubbles and their influence on pulmonary and right heart hemodynamics was reported after uncomplicated self-contained underwater breathing apparatus (SCUBA) dive(s). Improvements in cardiac imaging have recently focused great attention on the right ventricle (RV). The aim of our study was to evaluate possible effects of a single air SCUBA dive on RV function using 2D speckle tracking echocardiography in healthy divers after single open sea dive to 18 meters of seawater, followed by bottom stay of 47 minutes with a direct ascent to the surface...
December 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29161314/conventional-and-technical-diving-surveys-reveal-elevated-biomass-and-differing-fish-community-composition-from-shallow-and-upper-mesophotic-zones-of-a-remote-united-states-coral-reef
#13
Roldan C Muñoz, Christine A Buckel, Paula E Whitfield, Shay Viehman, Randy Clark, J Christopher Taylor, Brian P Degan, Emma L Hickerson
The world's coral reefs appear to be in a global decline, yet most previous research on coral reefs has taken place at depths shallower than 30 m. Mesophotic coral ecosystem (depths deeper than ~30 m) studies have revealed extensive, productive habitats and rich communities. Despite recent advances, mesophotic coral ecosystems remain understudied due to challenges with sampling at deeper depths. The few previous studies of mesophotic coral ecosystems have shown variation across locations in depth-specific species composition and assemblage shifts, potentially a response to differences in habitat or light availability/water clarity...
2017: PloS One
https://www.readbyqxmd.com/read/29117262/benthic-colonization-in-newly-ice-free-soft-bottom-areas-in-an-antarctic-fjord
#14
Cristian Lagger, Natalia Servetto, Luciana Torre, Ricardo Sahade
Extended glacier retreat is among the main consequences of the rapid warming of the West Antarctic Peninsula. Particularly, in the inner part of Potter Cove (South Shetland Islands, Antarctica) large areas are now exposed to open sea conditions owing to the retreat of Fourcade glacier. During the 2010 austral summer, underwater photographic surveys were undertaken by SCUBA diving up to 30 m in these new ice-free areas 80 m from the glacier front. Our main aim was to investigate colonization and early succession of the benthic assemblages on soft-bottom areas...
2017: PloS One
https://www.readbyqxmd.com/read/29116696/spinal-decompression-sickness-in-an-artisanal-diving-fisherman-in-yucat%C3%A3-n-mexico-a-case-report
#15
Daniel Popa, Walter Chin, Oswaldo Huchim-Lara, Ian Grover
Artisanal fishermen around the world employ scuba and surface-supplied diving for their livelihoods and often undergo provocative dive profiles due to economic pressures. Consequently, rates of decompression sickness (DCS) are much greater than in recreational scuba divers. Here we present the case of a surface-supplied diving fisherman from the Yucatán Peninsula of Mexico, who suffered a significant episode of spinal DCS and underwent hyperbaric oxygen therapy treatments, with a favorable outcome. Additionally, we review the proposed mechanisms underlying spinal DCS...
2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29116695/repetitive-freshwater-diving-risk-factors-and-prevalence-of-barotrauma
#16
Stefanie Jansen, Moritz Friedo Meyer, Manuela Boor, Ruth Volland, Eberhard Daniel Pracht, Heinz Dieter Klünter, Karl-Bernd Hüttenbrink, Dirk Beutner, Maria Grosheva
OBJECTIVE: The aim was to investigate the influence of repetitive scuba diving in fresh water on the middle ear mucosa. The prevalence of middle ear barotrauma (MEB) and risk factors for MEB were evaluated. STUDY DESIGN: Prospective cohort study, Level of evidence 1b. METHODS: During three days, 23 divers made 144 repetitive dives in a freshwater lake. Participants underwent otoscopic examinations and were questioned about ENT-related complaints in the morning before the first dive, in between the dives and after the last dive...
2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29116694/efficacy-of-the-u-s-navy-treatment-tables-in-treating-dcs-in-103-recreational-scuba-divers
#17
Walter Chin, Ellie Joo, Scott Ninokawa, Daniel A Popa, Derek B Covington
Despite the fact that current decompression schedules reduce the risk of decompression sickness (DCS), recreational scuba divers continue to experience DCS. Therapy outcomes in these divers are difficult to track. Our study aims to understand the efficacy of the United States Navy (USN) Treatment Tables (5, 6, 6A, 9) in providing symptomatic relief among recreational scuba divers. We conducted a single-center retrospective review of recreational divers treated from 2003 to 2013. A total of 187 divers were identified: 84 divers were excluded, and the charts of the remaining 103 divers were independently reviewed by three clinicians...
2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29109872/severe-decompression-illness-case-report-prehospital-recognition-and-regional-transport-considerations
#18
Julie Estrada, David Meurer, Kevin De Boer, Karl Huesgen
A 46-year-old male presented to our tertiary care emergency department (ED) with shortness of breath and chest pain following an uneventful four-hour SCUBA dive at 100 feet. His prehospital emergency medical services (EMS) assessment revealed transient hypotension and hypoxia. He later developed progressive skin mottling. Serology was significant for acute kidney injury, transaminitis, hemoconcentration, and hypoxia on an arterial blood gas. Computed tomography (CT) angiography demonstrated intravascular gas throughout the mesenteric and pulmonary arteries as well as the portal venous system...
2017: Case Reports in Emergency Medicine
https://www.readbyqxmd.com/read/29056141/the-economy-of-shark-conservation-in-the-northeast-pacific-the-role-of-ecotourism-and-citizen-science
#19
Peter A Mieras, Chris Harvey-Clark, Michael Bear, Gina Hodgin, Boone Hodgin
Historically sharks have been seen either as a source of income through harvesting, or as a nuisance and danger. The economic value of sharks has traditionally been measured as the total value of sharks caught for liver oil, fins, or meat for consumption. Sharks have also been killed to near extinction in cases where they were seen as a threat to fisheries on other species. This is illustrated by the mass extermination of Basking Sharks (Cetorhinus maximus) in British Columbia. They were seen as a nuisance to fishermen as they got entangled in gill nets during the salmon fishing season...
2017: Advances in Marine Biology
https://www.readbyqxmd.com/read/28991099/nonsurgical-management-of-retained-needlefish-jaw
#20
Clarissa Kum, Jessica R Chang, Anna M Gruener, Timothy J McCulley
While scuba diving, the left medial canthus of a 53-year-old man was pierced by a needlefish. He immediately lost vision in his left eye. An orbital computed tomographic scan showed the needlefish jaw in the left optic canal. The left medial orbit was explored surgically but no foreign object was removed. One month later, MRI confirmed the presence of the retained needlefish jaw. A conservative approach was taken and the patient remained stable over 3 months of follow-up.
October 4, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
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