Get full text report (pdf file; Read by ADOBE Acrobat Reader)
J Occup Health year 2001 volume 43 number 1 page 56 - 60
Classification Field Study
Title Neurological Diving Accidents in Japanese Breath-Hold Divers: A Preliminary Report
Author Kiyotaka KOHSHI1, 4, Takahiko KATOH3, Haruhiko ABE2 and Toshio OKUDERA5
Organization 1Department of Neurosurgery and 2Internal Medicine, School of Medicine, 3Department of Health Information Science, School of Health Sciences, University of Occupational and Environmental Health, 4Division of Hyperbaric Medicine, University Hospital of Occupational and Environmental Health, and 5Department of Radiology, Akita Research Institute of Brain and Blood Vessels
Keywords Diving accident, Stroke, Cerebral infarction, Breath-hold diving, Japanese male divers
Correspondence K. Kohshi, Department of Neurosurgery and Division of Hyperbaric Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan
Abstract Neurological Diving Accidents in Japanese Breath-Hold Divers: A Preliminary Report: Kiyotaka KOHSHI, et al. Department of Neurosurgery and Division of Hyperbaric Medicine, University of Occupational and Environmental Health-There have been no reports of diving accidents involving Korean or Japanese professional breath-hold (ama) divers except for our 2 recent cases. We investigated a direct interview survey on their village to determine whether other ama divers had experienced any accidents during or after dives. Interview responses were retrospectively obtained from 16 partially assisted male ama divers belonging to the Utsu Union on Mishima Island, Yamaguchi Prefecture in Japan. We questioned the divers about diving history (diving depth, length of the diving shift, number of dives and diving accidents), medical history (hypertension, cardiac arrhythmia, diabetes mellitus, and cerebrovascular diseases) and health habits (smoking and alcohol consumption). Nine of 16 ama divers previously had stroke-like neurological accidents, in which the most common symptom were unilateral motor weakness [7 cases] and sensory abnormalities [4 cases]. All of these neurological problems had manifested transiently. In addition, 13 of 16 divers had occasional episodes of dizziness, nausea and/or euphoria during such dives. Repeated deep breath-hold dives may be harmful to the divers and cause brain involvement.