کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2614278 1135012 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Doppler Detection in Ama Divers of Japan
ترجمه فارسی عنوان
تشخیص داپلر در غواصان آمیا ژاپن
کلمات کلیدی
حباب ها، بیماری فشاری، غواصی ام
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی طب اورژانس
چکیده انگلیسی

ObjectiveSymptoms consistent with neurological decompression sickness (DCS) in commercial breath-hold (Ama) divers has been reported from a few districts of Japan. The aim of this study was to detect circulating intravascular bubbles after repetitive breath-hold diving in a local area where DCS has been reported in Ama divers.MethodsThe participants were 12 partially assisted (descent using weights) male Ama divers. The equipment (AQUALAB system) consisted of continuous-wave Doppler with a 5-MHz frequency, and the Doppler probe was placed in the precordial site with the ultrasonic wave directed into the pulmonary infundibulum. We carried out continuous monitoring for 10 minutes at the end of the series of repetitive dives, and the recordings were made on numerical tracks and graded in a blind manner by 2 experienced investigators, according to the Spencer Doppler code.ResultsDepths and number of dives were 8 to 20 m and 75 to 131 times. Mean diving duration and surface interval were 64 ± 12 seconds and 48 ± 8 seconds, respectively (mean ± SD). We detected the lowest grade of intravascular bubbles (Spencer’s grade I) in an Ama diver whose mean surface interval was only 35.2 ± 6.2 seconds. His mean descending, bottom, and ascending times were 10.4 ± 1.6 seconds, 39.2 ± 8 seconds, and 18.2 ± 3.0 seconds, respectively, over the course of 99 dives.ConclusionsIntravascular bubbles may be formed after repetitive breath-hold dives with short surface intervals or after a long breath-holding session in Ama divers. Symptoms consistent with neurological accidents in repetitive breath-hold diving may be caused in part by the intravascular presence of bubbles, indicating the need for safety procedures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wilderness & Environmental Medicine - Volume 25, Issue 3, September 2014, Pages 258–262
نویسندگان
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