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https://www.readbyqxmd.com/read/28777907/elimination-of-ct-detected-gas-bubbles-derived-from-decompression-illness-with-abdominal-symptoms-after-a-short-hyperbaric-oxygen-treatment-in-a-monoplace-chamber-a-case-report
#1
Takuya Oyaizu, Mitsuhiro Enomoto, Toshihide Tsujimoto, Yasushi Kojima, Atsushi Okawa, Kazuyoshi Yagishita
We report the case of a 54-year-old male compressed-air worker with gas bubbles detected by computed tomography (CT). He had complained of strong abdominal pain 30 minutes after decompression after working at a pressure equivalent to 17 meters of sea water for three hours. The initial CT images revealed gas bubbles in the intrahepatic portal vein, pulmonary artery and bilateral femoral vein. After the first hyperbaric oxygen treatment (HBO₂ at 2.5 atmospheres absolute/ATA for 150 minutes), no bubbles were detected on repeat CT examination...
March 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/28768090/erratum-regarding-inaccurate-authorship-attributions-noted
#2
(no author information available yet)
For the paper 'Hyperbaric programs in the United States: Locations and capabilities of treating decompression sickness, arterial gas embolisms, and acute carbon monoxide poisoning: survey results,' authorship and affiliations in UHM 43-1 read as: Chin W, Jacoby L, Simon O, Talati N, Wegrzyn G, Jacoby R, Proano J, Sprau SE, Markovitz G, Hsu R, Joo E. Undersea Hyperb Med. 2016 Jan-Feb; 43(1): 29-43. The corrected authorship reads as: Chin W, Jacoby L, Simon O, Talati N, Wegrzyn G, Jacoby R, Proano J, Sprau SE, Markovitz GH, Hsu R, Joo E...
January 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/28745648/fizzy-extraction-of-volatile-organic-compounds-combined-with-atmospheric-pressure-chemical-ionization-quadrupole-mass-spectrometry
#3
Hao-Chun Yang, Cheng-Hao Chang, Pawel L Urban
Chemical analysis of volatile and semivolatile compounds dissolved in liquid samples can be challenging. The dissolved components need to be brought to the gas phase, and efficiently transferred to a detection system. Fizzy extraction takes advantage of the effervescence phenomenon. First, a carrier gas (here, carbon dioxide) is dissolved in the sample by applying overpressure and stirring the sample. Second, the sample chamber is decompressed abruptly. Decompression leads to the formation of numerous carrier gas bubbles in the sample liquid...
July 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28740100/quantification-of-cell-bubble-interactions-in-a-3d-engineered-tissue-phantom
#4
C Walsh, N Ovenden, E Stride, U Cheema
Understanding cell-bubble interactions is crucial for preventing bubble related pathologies and harnessing their potential therapeutic benefits. Bubbles can occur in the body as a result of therapeutic intravenous administration, surgery, infections or decompression. Subsequent interactions with living cells, may result in pathological responses such as decompression sickness (DCS). This work investigates the interactions that occur between bubbles formed during decompression and cells in a 3D engineered tissue phantom...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720994/early-migration-of-bone-graft-causing-sigmoid-colon-perforation-after-trans-foraminal-lumbar-interbody-fusion
#5
Bhavuk Garg, Amit Singla, Sahil Batra, Senthil Kumar
BACKGROUND: Tran foraminal lumbar interbody fusion (TLIF) is a well accepted and standard technique of achieving spinal fusion using pedicle screws, cage and bone graft. We are presenting here a case of L4-L5 lumbar canal stenosis managed with TLIF that presented with sigmoid colon perforation due to bone graft migration 4 days after surgery. CASE REPORT: A 35 years old female underwent open TLIF (from right side) with decompression for L4-L5 lumbar canal stenosis...
April 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28661230/circle-co2-reabsorbing-breathing-systems-human-applications
#6
Patrick Magee
Artificial breathing systems to help humans survive extreme environments are used over a range of ambient pressures, using various gases of different volumetric concentrations. These activities include anaesthesia and intensive care activity, high-altitude mountaineering, firefighting, aerospace extravehicular space activity and underwater diving operations. A circle breathing system is one in which the exhaled carbon dioxide is absorbed by an alkali substance and the remaining unused gases are recirculated, usually for the sake of economy and environment...
July 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28641811/tension-pneumocephalus-following-suboccipital-sitting-craniotomy-in-the-pediatric-population
#7
P Daszkiewicz, D Dziedzic
BACKGROUND: Sitting craniotomy often results in entrapment of air in fluid-filled intracranial cavities. Gas under pressure exerts a deleterious effect on adjacent nervous tissue, resulting in clinical deterioration. AIM OF STUDY: To assess the incidence of tension pneumocephalus (TP) and to define risk factors associated therewith. MATERIAL AND METHOD: Analysis included 100 consecutive patients (57 boys, 43 girls, mean age 9.7 y) undergoing suboccipital sitting craniotomy since 2012 to 2014...
May 11, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28641319/understanding-scuba-diving-fatalities-carbon-dioxide-concentrations-in-intra-cardiac-gas
#8
Vincent Varlet, Alejandro Dominguez, Marc Augsburger, Maisy Lossois, Coraline Egger, Cristian Palmiere, Raquel Vilarino, Silke Grabherr
INTRODUCTION: Important developments in the diagnosis of scuba diving fatalities have been made thanks to forensic imaging tool improvements. Multi-detector computed tomography (MDCT) permits reliable interpretation of the overall gaseous distribution in the cadaver. However, due to post-mortem delay, the radiological interpretation is often doubtful because the distinction between gas related to the dive and post-mortem decomposition artifactual gases becomes less obvious. METHODS: We present six cases of fatal scuba diving showing gas in the heart and other vasculature...
June 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28600260/diving-into-research-of-biomedical-engineering-in-scuba-diving
#9
Tobias Cibis, Alistair McEwan, Bjoern Eskofier, John Lippmann, Karl Friedl, Michael Bennett
The physiologic response of the human body to different environments is a complex phenomenon to ensure survival. Immersion and compressed gas diving, together trigger a set of responses. Monitoring those responses in real-time may increase our understanding of these and help to develop safety procedures and equipment. This review outlines diving physiology and diseases and identifies physiological parameters worthy of monitoring. Subsequently, we have investigated technological approaches matched to those in order to evaluated their capability for underwater application...
June 7, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28572687/defining-risk-variables-causing-gas-embolism-in-loggerhead-sea-turtles-caretta-caretta-caught-in-trawls-and-gillnets
#10
Andreas Fahlman, Jose Luis Crespo-Picazo, Blair Sterba-Boatwright, Brian A Stacy, Daniel Garcia-Parraga
Incidental capture, or 'bycatch' in fishing gear is a major global threat to sea turtle populations. A recent study showed that underwater entrapment in fishing gear followed by rapid decompression may cause gas bubble formation within the blood stream (embolism) and tissues leading to organ injury, impairment, and even mortality in some bycaught individuals. We analyzed data from 128 capture events using logistic and ordinal regression to examine risk factors associated with gas embolism in sea turtles captured in trawls and gillnets...
June 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28531363/beneficial-effect-of-enriched-air-nitrox-on-bubble-formation-during-scuba-diving-an-open-water-study
#11
Anne-Kathrin Brebeck, Andreas Deussen, Ursula Range, Costantino Balestra, Sinclair Cleveland, Jochen D Schipke
Bubble formation during scuba diving might induce decompression sickness. This prospective randomised and double-blind study included 108 advanced recreational divers (38 females). Fifty-four pairs of divers, 1 breathing air and the other breathing nitrox28 undertook a standardised dive (24 ± 1 msw; 62 ± 5min) in the Red Sea. Venous gas bubbles were counted (Doppler) 30-<45 min (early) and 45-60 min (late) post-dive at jugular, subclavian and femoral sites. Only 7% (air) vs. 11% (air28®) (n.s.) were bubble-free after a dive...
May 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28518001/propranolol-effects-on-decompression-sickness-in-a-simulated-dissub-rescue-in-swine
#12
Angela S Forbes, David P Regis, Aaron A Hall, Richard T Mahon, William A Cronin
INTRODUCTION: Disabled submarine (DISSUB) survivors may face elevated CO2 levels and inert gas saturation, putting them at risk for CO2 toxicity and decompression sickness (DCS). Propranolol was shown to reduce CO2 production in an experimental DISSUB model in humans but its effects on DCS in a DISSUB rescue scenario are unknown. A 100% oxygen prebreathe (OPB) reduces DCS incidence and severity and is incorporated into some DISSUB rescue protocols. We used a swine model of DISSUB rescue to study the effect of propranolol on DCS incidence and mortality with and without an OPB...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28517999/venous-gas-emboli-and-ambulation-at-4-3-psia
#13
Johnny Conkin, Neal W Pollock, Michael J Natoli, Stefanie D Martina, James H Wessel, Michael L Gernhardt
INTRODUCTION: Ambulation during extravehicular activity on Mars may increase the risk of decompression sickness through enhanced bubble formation in the lower body. HYPOTHESES: walking effort (ambulation) before an exercise-enhanced denitrogenation (prebreathe) protocol at 14.7 psia does not increase the incidence of venous gas emboli (VGE) at 4.3 psia, but does increase incidence if performed after tissues become supersaturated with nitrogen at 4.3 psia. METHODS: VGE results from 45 control subjects who performed exercise prebreathe without ambulation before or during a 4-h exposure to 4...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28505552/probabilistic-pharmacokinetic-models-of-decompression-sickness-in-humans-part-1-coupled-perfusion-limited-compartments
#14
F Gregory Murphy, Ethan A Hada, David J Doolette, Laurens E Howle
Decompression sickness (DCS) is a disease caused by gas bubbles forming in body tissues following a reduction in ambient pressure, such as occurs in scuba diving. Probabilistic models for quantifying the risk of DCS are typically composed of a collection of independent, perfusion-limited theoretical tissue compartments which describe gas content or bubble volume within these compartments. It has been previously shown that 'pharmacokinetic' gas content models, with compartments coupled in series, show promise as predictors of the incidence of DCS...
July 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28482432/-quick-confirmation-of-nasointestinal-tube-placed-below-pylorus-in-critically-ill-patients-by-duodenal-bulb-ultrasonic-anatomy-locating-method
#15
R Z Ye, X M Fan, R H Sun, F Zhang, L G Wang, Z Zeng, Y Liu, B C Hu, Y X Tu
Objective: To investigate the value of duodenal bulb ultrasonic anatomy locating method quickly confirm nasointestinal tube placed below pylorus in critically ill patients. Methods: A total of 56 critically ill patients with nasointestinal tube posting surgery by blindly inserting method were collected from March 1 st, 2016 to August 1 st, 2016 in the Department of Critical Care Medicine of Zhejiang Provincial People's Hospital.In these patients, the duodenal bulbs were rapidly detected and located by ultrasonic anatomy locating method and at the same time observed whether nasointestinal tube echogram were in them or not...
May 9, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28417835/objective-vs-subjective-evaluation-of-cognitive-performance-during-0-4-mpa-dives-breathing-air-or-nitrox
#16
RANDOMIZED CONTROLLED TRIAL
Peter Germonpré, Costantino Balestra, Walter Hemelryck, Peter Buzzacott, Pierre Lafère
BACKGROUND: Divers try to limit risks associated with their sport, for instance by breathing enriched air nitrox (EANx) instead of air. This double blinded, randomized trial was designed to see if the use of EANx could effectively improve cognitive performance while diving. METHODS: Eight volunteers performed two no-decompression dry dives breathing air or EANx for 20 min at 0.4 MPa. Cognitive functions were assessed with a computerized test battery, including MathProc and Ptrail...
May 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28411929/updates-in-decompression-illness
#17
REVIEW
Neal W Pollock, Dominique Buteau
Decompression sickness and arterial gas embolism, collectively known as decompression illness (DCI), are rare but serious afflictions that can result from compressed gas diving exposures. Risk is primarily determined by the pressure-time profile but is influenced by several factors. DCI can present idiosyncratically but with a wide range of neurologic symptoms. Examination is critical for assessment in the absence of diagnostic indicators. Many conditions must be considered in the differential diagnosis. High-fraction oxygen breathing provides first aid but definitive treatment of DCI is hyperbaric oxygen...
May 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/28407706/gas-containing-cervical-epidural-abscess-accompanying-bacterial-meningitis-in-an-adult
#18
Dong Min Kim, Seok Won Kim
Gas-containing spinal epidural abscesses are uncommon. Moreover, acute spinal epidural abscesses rarely complicate bacterial meningitis in adults. Here, we report a rare case of a gas-containing cervical epidural abscess accompanying bacterial meningitis. In spite of aggressive fluid and continuous antibiotic therapy after the isolation of Streptococcus anginosus and Streptococcus constellatus in the cerebrospinal fluid cultures, the patient showed remaining motor dysfunction and bladder involvement. Our experience suggests that the effort to prevent neurologic deterioration by emergent surgical decompression and drainage of pus is mandatory to avoid additional spinal cord dysfunction in patients with spinal epidural abscesses accompanying bacterial meningitis...
March 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/28371463/microbial-cell-disruption-for-improving-lipid-recovery-using-pressurized-co2-role-of-co2-solubility-in-cell-suspension-sugar-broth-and-spent-media
#19
Md Shamim Howlader, William Todd French, Sara A Shields-Menard, Marta Amirsadeghi, Magan Green, Neeraj Rai
The study of in situ gas explosion to lyse the triglyceride-rich cells involves the solubilization of gas (e.g., carbon dioxide, CO2 ) in lipid-rich cells under pressure followed by a rapid decompression, which allows the gas inside the cell to rapidly expand and rupture the cell from inside out. The aim of this study was to perform the cell disruption using pressurized CO2 as well as to determine the solubility of CO2 in Rhodotorula glutinis cell suspension, sugar broth media, and spent media. Cell disruption of R...
April 3, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28357819/a-comparative-evaluation-of-two-decompression-procedures-for-technical-diving-using-inflammatory-responses-compartmental-versus-ratio-deco
#20
COMPARATIVE STUDY
Enzo Spisni, Claudio Marabotti, Luigia De Fazio, Maria Chiara Valerii, Elena Cavazza, Stefano Brambilla, Klarida Hoxha, Antonio L'Abbate, Pasquale Longobardi
INTRODUCTION: The aim of this study was to compare two decompression procedures commonly adopted by technical divers: the ZH-L16 algorithm modified by 30/85 gradient factors (compartmental decompression model, CDM) versus the 'ratio decompression strategy' (RDS). The comparison was based on an analysis of changes in diver circulating inflammatory profiles caused by decompression from a single dive. METHODS: Fifty-one technical divers performed a single trimix dive to 50 metres' sea water (msw) for 25 minutes followed by enriched air (EAN50) and oxygen decompression...
March 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
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