| Document ID (ISN) | 49909 |
| CIS number |
88-1334 |
| ISSN - Serial title |
0047-1879 - Japanese Journal of Industrial Health - Sangyō-Igaku |
| Year |
1987 |
| Convention or series no. |
|
| Author(s) |
Shibayama M., Mano Y., Okubo J. |
| Title |
Study of Eustachian tube function in fishermen (oikomi-gyohō) divers |
| Original title |
Gyogyō (oikomi-gyohō) daibā no jikan kinō ni kansuru kenkyū [in Japanese] |
| Bibliographic information |
July 1987, Vol.29, No.4, p.265-270. Illus. 15 ref. |
| Abstract |
The intranasal pressure at the opening of the auditory tube was compared by Valsalva's method with that of normal adults under atmospheric pressure to assess the auditory tubal function of divers often exposed to hyperbaric conditions. The mean auditory tube opening pressure was higher in the divers than in the controls. There are 2 ways of accommodating human auditory tubal ventilation: active opening and passive opening - the former is predominant in adults, the latter in children. The function in divers resembles the child type. This finding suggested that their auditory tube might not open and close with each swallowing movement under atmospheric pressure, or the auditory tube and the middle ear themselves no longer needed the opening with each swallowing movement under atmospheric pressure. Moreover, divers take various postures while they are diving, including a head-down posture. The auditory tube opens less readily in the head-down position. This phenomenon appears to represent the effect of hydrostatic venous pressure in water. |
| Descriptors (primary) |
hyperbaric pressure; ear; fishing; diving |
| Descriptors (secondary) |
venous blood pressure |
| Document type |
D - Periodical articles |
| Subject(s) |
Agriculture, fishing, animal husbandry
|
| Broad subject area(s) |
Physical hazards
|
| Browse category(ies) |
Hyperbaric pressure
Fishing
|
