Tiep B L, Burns M, Hererra J
Pulmonary Rehabilitation, Casa Colina Center for Rehabilitation, Pomona, CA.
Chest. 1989 Apr;95(4):857-60. doi: 10.1378/chest.95.4.857.
Multiple benefits of oxygen therapy for hypoxemic patients with chronic lung disease are well established. Steady flow oxygen therapy is inefficient, wasteful and has a high cost. The Oxymizer pendant improves efficiency of oxygen delivery compared with SF. However, the device requires that the patient inhale and exhale nasally to maximize its oxygen-saving properties. When patients do PLB they may not receive full oxygen-saving benefit of the pendant. Yet PLB itself can increase SaO2. We evaluated an AP, which does not require nasal exhalation, in nine patients with COPD. We measured SaO2 while breathing oxygen via SF and the AP with nasal-only breathing and PLB. Results indicate that the AP maintains an increase in SaO2 over SF during nasal-only breathing and a further increase during PLB. We conclude that AP acts as an oxygen conserver during PLB; PLB with the AP achieves greater savings than with nasal-only breathing.
氧疗对慢性肺病低氧血症患者的多重益处已得到充分证实。持续流量氧疗效率低下、浪费且成本高昂。与持续流量氧疗相比，Oxymizer吊坠提高了氧气输送效率。然而，该设备要求患者通过鼻腔吸气和呼气，以最大限度地发挥其节省氧气的特性。当患者进行缩唇呼吸时，他们可能无法充分获得吊坠节省氧气的益处。然而，缩唇呼吸本身可以提高动脉血氧饱和度（SaO2）。我们评估了一种无需通过鼻腔呼气的辅助装置（AP），对9名慢性阻塞性肺疾病（COPD）患者进行了研究。我们测量了患者在通过持续流量氧疗和该辅助装置仅经鼻腔呼吸及缩唇呼吸时吸氧过程中的动脉血氧饱和度。结果表明，在仅经鼻腔呼吸时，该辅助装置能使动脉血氧饱和度高于持续流量氧疗，在缩唇呼吸时动脉血氧饱和度进一步升高。我们得出结论，在缩唇呼吸过程中，该辅助装置起到了节省氧气的作用；使用该辅助装置进行缩唇呼吸比仅经鼻腔呼吸节省更多氧气。
