Article Text

This article has a correction. Please see:

other Versions

PDF
Passive Flooding Of Paranasal Sinuses And Middle Ears As A Method Of Equalisation In Extreme Breath-hold Diving
  1. Peter Germonpré (peter.germonpre{at}mil.be)
  1. Military Hospital Brussels, Belgium
    1. Costantino Balestra (daneuben{at}skynet.be)
    1. Universite Libre de Bruxelles, Haute Ecole Paul Henri Spaak, Belgium
      1. Patrick Musimu (patrick{at}patrickmusimu.com)
      1. DAN Europe Research Division, Belgium

        Abstract

        Breath-hold diving (BHD) is both a recreational activity, performed by thousands of enthusiasts in Europe, and a high-performance competitive sport. Several “disciplines” exist, of which the “no-limits” category is the most spectacular: using a specially designed heavy “sled”, divers descend to extreme depths on a cable, and then re-ascend using an inflatable balloon, on a single breath. The current world record for un-assisted descent stands at more than 200 meters of depth. Equalising air pressure in the paranasal sinuses and middle ear cavities is a necessity during descent to avoid barotraumas. However, this requires active insufflations of precious air, which is thus unavailable in the pulmonary system. We describe a diver who, by training, is capable of allowing passive flooding of the sinuses and middle ear with (sea) water during descent, by suppressing protective (parasympathetic) reflexes during this process. Using this technique, he performed a series of extreme depth breath-hold dives in June 2005, descending to 209 meters of sea water on one breath of air.

        Statistics from Altmetric.com

        Request permissions

        If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

        Linked Articles

        • Corrections
          BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine