Pneumothorax during manned chamber operations: A summary of reported cases
Undersea Hyperb Med. 2024 First Quarter;51(1):29-35.ABSTRACTIn-chamber pneumothorax has complicated medically remote professional diving operations, submarine escape training, management of decompression illness, and hospital-based provision of hyperbaric oxygen therapy. Attempts to avoid thoracotomy by combination of high oxygen partial pressure breathing (the concept of inherent unsaturation) and greatly slowed rates of chamber decompression proved successful on several occasions. When this delicate balance designed to prevent the intrapleural gas volume from expanding faster than it contracts proved futile, chest drains...
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Richard E Clarke Keith Van Meter Source Type: research
Surviving cardiac arrest after carbon monoxide poisoning treated with hyperbaric oxygen therapy
Undersea Hyperb Med. 2024 First Quarter;51(1):37-40.ABSTRACTCarbon monoxide (CO) and cyanide poisoning are frequent causes of morbidity and mortality in cases of house and industrial fires. The 14th edition of guidelines from the Undersea and Hyperbaric Medical Society does not recommend hyperbaric oxygen (HBO2) treatment in those patients who have suffered a cardiac arrest and had to receive cardiopulmonary resuscitation. In this paper, we describe the case of a 31-year-old patient who received HBO2 treatment in the setting of cardiac arrest and survived.PMID:38615351 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Vladimir Bronshteyn Stephen M Hendriksen Samantha J Lee Christopher Logue Source Type: research
Decompression sickness followed by diabetic ketoacidosis and sepsis shock: an unusual case report
Undersea Hyperb Med. 2024 First Quarter;51(1):41-46.ABSTRACTDecompression sickness (DCS) is caused by abrupt changes in extracorporeal pressure with varying severity. Symptoms range from mild musculoskeletal pain to severe organ dysfunction and death, especially among patients with chronic underlying disease. Here, we report an unusual case of a 49-year-old man who experienced DCS after a dive to a depth of 38 meters. The patient's symptoms progressed, starting with mild physical discomfort that progressed to disturbance of consciousness on the second morning. During hospitalization, we identified that in addition to DCS, ...
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Anwei Liu Xiaogan Hou Jing Nie Qiang Wen Zhiguo Pan Source Type: research
Barodontalgia during hyperbaric oxygen therapy of an 8-year-old male: A case report
In conclusion, caries lesions and faulty restorations should be examined before hyperbaric oxygen therapy sessions. Even though barodontalgia is a rare phenomenon, dental examination is essential to avoid these kinds of pain-related complications. All carious lesions and defective restorations must be treated, if necessary. Removal of faulty restorations and management of inflammation as part of the treatment is suggested before exposure to pressure changes.PMID:38615353 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Melisa Öçbe Selin Gamze S ümen B üşra Dilara Altun Asim Dumlu Source Type: research
Chondronecrosis of the cricoid treated with hyperbaric oxygen therapy: A case series
We present two cases of cricoid chondronecrosis treated with hyperbaric oxygen (HBO2) therapy. Both patients presented with biphasic stridor and dyspnea several weeks after an intubation event. Tracheostomy was ultimately performed for airway protection, followed by antibiotic treatment and outpatient HBO2 therapy. Both patients were decannulated within six months of presentation and after at least 20 HBO2 therapy sessions. Despite a small sample size, our findings are consistent with data supporting HBO2 therapy's effects on tissue edema, neovascularization, and HBO2 potentiation of antibiotic treatment and leukocyte func...
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: John David Spencer Tyler Connely Jeffrey Cooper Jayme Rose Dowdall Source Type: research
Relation between resting spleen volume and apnea-induced increases in hemoglobin mass
CONCLUSION: Larger spleen volume is not associated with a greater rise in apneas-induced increases in Hbmass in non-apnea-trained healthy adults.PMID:38615355 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Jason M Keeler Hayden W Hess Erica Tourula Robert F Chapman Blair D Johnson Zachary J Schlader Source Type: research
In-field use of I-VED electrical impedance sensor for assessing post-dive decompression stress in humans
CONCLUSIONS: I-VED was used for the first time in humans and operated to provide qualitative in-vivo electrical impedance measurements that may contribute to the assessment of decompression stress. Compared to ultrasound imaging, the proposed method is less expensive, not operator-dependent and compatible with continuous monitoring and application of multiple probes. This study provided preliminary insights; further calibration and validation are necessary to determine I-VED sensitivity and specificity.PMID:38615356 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Sotiris P Evgenidis Konstantinos Zacharias Virginie Papadopoulou Sigrid Theunissen Costantino Balestra Thodoris D Karapantsios Source Type: research
Physical and Physiological Predictors Determining the Maximal Static Apnea Diving Time of Male Freedivers
This study aimed to investigate what factors determine freedivers' maximal static apnea dive time. We correlated some physical/physiological factors with male freedivers' maximum apnea diving duration. Thirty-six experienced male freedivers participated in this study. The divers participated in two days of the experiments. On the first day, apnea diving time, blood oxygen saturation (SpO2), heart rate (HR), blood pressure (BP), stress index, and blood parameters were measured before, during, and after the apnea diving in the pool. On the second day, body composition, lung capacity, resting and maximal oxygen consumption (V...
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Dai-Woo Lee Hongwei Yang Jeong-Sun Ju Source Type: research
Arterial Gas Embolism in Breath-Hold Diver
Undersea Hyperb Med. 2024 First Quarter;51(1):93-95.ABSTRACTAn arterial gas embolism (AGE) is a potentially fatal complication of scuba diving that is related to insufficient exhalation during ascent. During breath-hold diving, an arterial gas embolism is unlikely because the volume of gas in the lungs generally cannot exceed the volume at the beginning of the dive. However, if a diver breathes from a gas source at any time during the dive, they are at risk for an AGE or other pulmonary overinflation syndromes (POIS). In this case report, a breath-hold diver suffered a suspected AGE due to rapidly ascending without exhalat...
Source: Undersea and Hyperbaric Medicine - April 14, 2024 Category: Sports Medicine Authors: Ryan A Gall Rahman R Rahimi Source Type: research
Buoyant ascent rate profiles for the MK10 and MK11 submarine escape and immersion equipment
CONCLUSIONS: The Vt of buoyant ascents is significantly affected by body weight. As the mean ascent rate of the MK11 is slower than that of the MK10, ascent rate profile differences between the suits do not appear to explain the recent increase in pulmonary barotrauma incident rates during escape training.PMID:38055875 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: David M Fothergill Christopher S Frederick Linda M Hughes Source Type: research
Aerobic exercise performance is reduced following prolonged cold-water immersion
Undersea Hyperb Med. 2023 Fourth Quarter;50(4):359-372.ABSTRACTWe tested the hypotheses that self-paced aerobic exercise performance is reduced following four hours of cold-water immersion when breathing air and further reduced when breathing 100% oxygen (O2). Nine healthy adults (four women; age 24 ± 3 years; body fat 17.9 ± 6.4%; VO2max 48±9 mL • kg • minute⁻¹) completed three visits: a no-immersion control trial and two experimental trials consisting of a four-hour cold-water immersion (20.1±0.3°C) either breathing air (FIO2 = 0.21) or O2 (FIO2 = 1.0). During the no-immersion control trial and following imme...
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: Hayden W Hess Zachary J Schlader Blair D Johnson Riana R Pryor David Hostler Source Type: research
Bubble rupture & amp; viability of red blood cells under resonant acoustic standing waves
CONCLUSION: Resonant acoustic standing waves effectively rupture bubbles of 300μm to 900μm within a simplified swine thigh model. The average dissolved gas content was 44% due to resonant acoustic waves at powers above 20W. No significant effect on red blood cell counts was observed.PMID:38055877 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: Edwin L ópez Ramos Manuel Rivera Bengoechea Silvina Cancelos Mancini Carlos Mar ín Martín Source Type: research
Hyperbaric treatment deviations for U.S. Navy divers: Spinal DCS
We describe a detailed recompression treatment regimen that deviated from standard USN protocol for an active-duty USN diver with a severe, delayed presentation of spinal cord DCS.CASE REPORT: A USN diver surfaced from his second of three dives on a standard Navy 'no-Decompression' Air SCUBA dive (Max depth 101 fsw utilizing a Navy Dive Computer) and developed mid-thoracic back pain, intense nausea, paresthesias of bilateral feet, and penile erection. Either not recognizing the con- stellation of symptoms as DCS and after resolution of the aforementioned symptoms, he completed the third planned dive (essentially an in-wate...
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: John DeMis Brian Michael Keuski April Due Source Type: research
Altitude Diving on a Closed Circuit Oxygen Rebreather
Undersea Hyperb Med. 2023 Fourth Quarter;50(4):391-393.ABSTRACTClosed-circuit rebreather diving is becoming more common. Rebreathers are complicated, adding to the stress of diving. Also adding to this complexity in the presented case is diving at a high-altitude, cold-water reservoir in Colorado. One diver experienced an oxygen-induced seizure at depth. The other diver had a rapid ascent with loss of consciousness. In this case, two experienced divers recovered from a possible devastating dive. Fortunately, they both returned to their pre-dive baseline health. Dive plan- ning is important, but as in this case, dive execut...
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: Jonathan Conard Source Type: research
Memory surfacing among veterans with PTSD receiving hyperbaric oxygen therapy
DISCUSSION: Among individuals with PTSD, the surfacing of new memories, accompanied by emotional distress and somatic pain, is common during HBO2. The surfacing of memories sheds light on the biological effect of HBO2 on the brain sequela of PTSD. It is highly important that in treating patients for any indication, HBO2 medical teams be aware and capable of addressing memory surfacing, particularly in those with a history of trauma.PMID:38055880 (Source: Undersea and Hyperbaric Medicine)
Source: Undersea and Hyperbaric Medicine - December 6, 2023 Category: Sports Medicine Authors: Keren Doenyas-Barak Ilan Kutz Erez Lang Gabriela Levi Shai Efrati Source Type: research
