• Title/Summary/Keyword: Rebreather

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A study on the improvement of ROK navy salvage and rescue activity using technical diving technique (테크니컬 잠수기술을 이용한 해군 해난구조 활동 효율성 향상방안)

  • Kim, Tae-Hyun;Park, Jung-Sik;Yu, Ho-Hwi;Kang, Sin-Young
    • Journal of Advanced Marine Engineering and Technology
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    • v.37 no.8
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    • pp.969-976
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    • 2013
  • This study suggests the improvement of ROK Navy salvage and rescue diving system. ROK Navy system experiences characteristic restrictions for the environmental loading. These restrictions are known to deteriorate the efficiency of Navy salvage and rescue diving activity. In this study, the measurements were suggested to improve the efficiency. To achieve the goal, a comprehensive analysis is conducted using the published data including those of USN, NOAA and IANTD. Based on the analysis, suggestions were made. The technical diving techniques may be introduced to improve current ROK Navy diving system in limited areas. By adopting that technique, decompression procedures and underwater operation can be improved.

A Preliminary Study for Effect of High Flow Oxygen through Nasal Cannula Therapy in Carbon Monoxide Poisoning (일산화탄소 중독 환자에서 고유속 비강 캐뉼라 산소치료 효과에 대한 예비 연구)

  • Kim, Young-Min;Kim, Sang-Chul;Park, Kwan-Jin;Lee, Seok-Woo;Lee, Ji-Han;Kim, Hoon
    • Journal of The Korean Society of Clinical Toxicology
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    • v.17 no.2
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    • pp.102-107
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    • 2019
  • Purpose: Acute carbon monoxide (CO) poisoning is one of the most common types of poisoning and a major health problem worldwide. Treatment options are limited to normobaric oxygen therapy, administered using a non-rebreather face mask or hyperbaric oxygen. Compared to conventional oxygen therapy, high-flow nasal cannula oxygen (HFNC) creates a positive pressure effect through high-flow rates. The purpose of this human pilot study is to determine the effects of HFNC on the rate of CO clearance from the blood, in patients with mild to moderate CO poisoning. Methods: CO-poisoned patients were administered 100% oxygen from HFNC (flow of 60 L/min). The fraction of COHb (fCOHb) was measured at 30-min intervals until it decreased to under 10%, and the half-life time of fCOHb (fCOHb t1/2) was subsequently determined. Results: At the time of ED arrival, a total of 10 patients had fCOHb levels ≥10%, with 4 patients ranging between 10% and 50%. The mean rate of fCOHb elimination patterns exhibits logarithmic growth curves that initially increase quickly with time (HFNC equation, Y=0.3388*X+11.67). The mean fCOHbt1/2 in the HFNC group was determined to be 48.5±12.4 minutes. Conclusion: In patients with mild to moderate CO poisoning, oxygen delivered via high flow nasal cannula is a safe and comfortable method to treat acute CO toxicity, and is effective in reducing the COHb half-life. Our results indicate HFNC to be a promising alternative method of delivering oxygen for CO toxicity. Validating the effectiveness of this method will require larger studies with clinical outcomes.