Choi Jae-Kap, Goldman Michael, Koyal Sankar, Clark Glenn
Department of Oral Medicine, School of Dentistry, Kyungpook National University, Taegu, Korea.
Sleep Breath. 2000;4(4):163-168. doi: 10.1007/s11325-000-0163-1.
This study evaluated whether changes in jaw and neck position caused substantial airway resistance (Raw) changes in normal controls and obstructive sleep apnea (OSA) subjects. Subject groups included 12 male nocturnal polysomnographically diagnosed OSA patients and 16 healthy male control subjects. Raw was assessed plethysmographically and measured under the following conditions: neutral head posture with 0/3, 1/3, 2/3, or 3/3 of the subjects maximum forward jaw position; normal jaw (0/3 forward) with fully flexed, extended, right or left rotated head position. Both groups showed a similar significant decrease in Raw upon jaw protrusion. OSA patients showed a significantly higher baseline (normal jaw, neutral head posture). Raw and both subject groups also had a clear increase in their airway resistance with flexion and to a lesser extent with neck rotation and extension. These data document that airway resistance can be significantly influenced by head and jaw positioning with protrusion of the jaw reducing Raw and flexing the neck increasing Raw.
本研究评估了下颌和颈部位置的变化是否会在正常对照组和阻塞性睡眠呼吸暂停（OSA）受试者中引起显著的气道阻力（Raw）变化。受试者组包括12名经夜间多导睡眠图诊断的男性OSA患者和16名健康男性对照受试者。通过体积描记法评估Raw，并在以下条件下进行测量：头部保持中立姿势，下颌处于受试者最大前伸位置的0/3、1/3、2/3或3/3；正常下颌（前伸0/3），头部完全屈曲、伸展、向右侧或左侧旋转。两组在颌前突时Raw均有类似的显著下降。OSA患者的基线（正常下颌，头部中立姿势）Raw显著更高。两个受试者组在颈部屈曲时气道阻力也明显增加，在颈部旋转和伸展时气道阻力增加程度较小。这些数据表明，气道阻力会受到头部和下颌位置的显著影响，下颌前突会降低Raw，而颈部屈曲会增加Raw。
