MECHANICAL-PROPERTIES OF THE HARBOR PORPOISE LUNG, PHOCOENA-PHOCOENA
MECHANICAL-PROPERTIES OF THE HARBOR PORPOISE LUNG, PHOCOENA-PHOCOENA
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DOI：
10.1016/0034-5687(79)90042-2
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发表时间：
1979-01-01
期刊：
影响因子：
--
通讯作者：
SINNETT, EE
中科院分区：
文献类型：
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作者：
KOOYMAN, GL;SINNETT, EE
测定了5只江豚离体肺的压力-容积和压力-流量特性。与陆生哺乳动物相比，肺体积相对于体重较大。肺能够排空至<总肺容量的17%。5-10肺活量（VC）的峰值呼气流速。s-1对哺乳动物来说相对较高。等容压力流量曲线显示40- 80%VC的流速平台聚集，在20%VC时流速平台显著下降。流量-体积曲线的轮廓是不寻常的正方形，流量保持在2 VC以上。s ~（-1）。该特性使排空时间短至< 0.2 s。软骨气道强化，延伸到肺泡囊，可能是负责不寻常的流量容量属性。这些鼠海豚有能力在短暂通过空气-水界面的过程中非常迅速地交换大部分肺部气体。
The pressure-volume and pressure-flow characteristics of the excised lungs of 5 harbor porpoise (P. phocoena) were determined. In comparison to terrestrial mammals the lung volume relative to body wt is large. The lungs are capable of emptying to < 17% of total lung capacity. Peak expiratory flow rates of 5-10 vital capacities (VC) .cntdot. s-1 are relatively high for mammals. Isovolume pressure flow curves showed a clustering of flow rate plateaus from 40-80% VC, with a marked drop in the flow rate plateau at 20% VC. The profile of flow-volume curves is unusually square shaped with flows remaining above 2 VC .cntdot. s-1 at a lung volume of 20% VC. This feature is responsible for the short emptying time of < 0.2 s. Cartilaginous airway reinforcement, which extends to the alveolar sac, is probably responsible for the unusual flow-volume properties. These porpoises have the capability of exchanging a large percent of their lung gas very rapidly during their brief pass through the air-water interface.