Seccombe Leigh M, Rogers Peter G, Mai Nghi, Wong Chris K, Kritharides Leonard, Jenkins Christine R
Dept. of Thoracic Medicine, Concord Repatriation General Hospital, Sydney, NSW 2139, Australia.
J Appl Physiol (1985). 2006 Sep;101(3):799-801. doi: 10.1152/japplphysiol.00075.2006. Epub 2006 May 11.
One technique employed by competitive breath-hold divers to increase diving depth is to hyperinflate the lungs with glossopharyngeal breathing (GPB). Our aim was to assess the relationship between measured volume and pressure changes due to GPB. Seven healthy male breath-hold divers, age 33 (8) [mean (SD)] years were recruited. Subjects performed baseline body plethysmography (TLC(PRE)). Plethysmography and mouth relaxation pressure were recorded immediately following a maximal GPB maneuver at total lung capacity (TLC) (TLC(GPB)) and within 5 min after the final GPB maneuver (TLC(POST)). Mean TLC increased from TLC(PRE) to TLC(GPB) by 1.95 (0.66) liters and vital capacity (VC) by 1.92 (0.56) liters (P < 0.0001), with no change in residual volume. There was an increase in TLC(POST) compared with TLC(PRE) of 0.16 liters (0.14) (P < 0.02). Mean mouth relaxation pressure at TLC(GPB) was 65 (19) cmH(2)O and was highly correlated with the percent increase in TLC (R = 0.96). Breath-hold divers achieve substantial increases in measured lung volumes using GPB primarily from increasing VC. Approximately one-third of the additional air was accommodated by air compression.
竞技屏气潜水者用于增加潜水深度的一种技术是通过舌咽呼吸（GPB）使肺部过度充气。我们的目的是评估因舌咽呼吸导致的测量体积和压力变化之间的关系。招募了7名健康男性屏气潜水者，年龄33（8）[均值（标准差）]岁。受试者进行了基线体容积描记法（TLC（PRE））。在肺总量（TLC）下进行最大舌咽呼吸动作后立即记录体容积描记法和口腔松弛压（TLC（GPB）），并在最后一次舌咽呼吸动作后5分钟内记录（TLC（POST））。平均肺总量从TLC（PRE）增加到TLC（GPB）1.95（0.66）升，肺活量（VC）增加1.92（0.56）升（P < 0.0001），残气量无变化。与TLC（PRE）相比，TLC（POST）增加了0.16升（0.14）（P < 0.02）。TLC（GPB）时的平均口腔松弛压为65（19）cmH₂O，与肺总量增加百分比高度相关（R = 0.96）。屏气潜水者使用舌咽呼吸主要通过增加肺活量实现测量肺容积的显著增加。大约三分之一的额外空气通过空气压缩容纳。
