Holbery-Morgan Lachlan, Carew James, Angel Cara, Simpson Nick, Steinfort Dan, Radford Sam, Murphy Michelle, Douglas Ned, Johnson Douglas
Lifesaving Victoria, Port Melbourne, VIC 3207, Australia.
Barwon Health - University Hospital Geelong, Geelong, VIC 3220, Australia.
Resusc Plus. 2021 Jun 29;7:100147. doi: 10.1016/j.resplu.2021.100147. eCollection 2021 Sep.
This study aimed to determine if pulse oximetry could reliably be used after immersion in water, and if so, which of the finger, earlobe or nose most reliably produced a functional waveform.
Pulse oximetry data was recorded from the ear, nose and finger before and after 30 min of immersion in water. The primary outcome was the ability to measure pulse oximetry at any of the sites.
A total of 119 participants were enrolled (with a median age of 16 years, 55% male). A useful pulse oximetry waveform was obtained after immersion from at least one of the measurement sites in 118 (99.2%) participants. Waveforms were usable after immersion in 96% of participants at the nostril, compared to 92% at the finger, and 41% at the ear lobe. The likelihood of success at the ear was significantly lower than either the finger or the nose (41% vs 92% and 96% respectively, p < 0.0001 for both comparisons). The finger and nostril were similar. Oxygen saturations were not significantly different after immersion at the nostril (100% vs 100%, p = 0.537) and finger (100% vs 100%, p = 0.032) sites but were different at the ear (100% vs 96%, p < 0.0001).
This study demonstrates that pulse oximetry is feasible and reliable in a large cohort of participants who have been immersed in water for 30 min. The results support the nostril as the most reliable location. Only pulse oximeters registered for clinical use should be employed for patient care.
本研究旨在确定脉搏血氧饱和度测定法在浸入水中后是否能可靠使用，若能，则确定手指、耳垂或鼻子中哪个部位能最可靠地产生功能性波形。
在浸入水中30分钟前后，记录耳朵、鼻子和手指的脉搏血氧饱和度数据。主要结果是在任何一个部位测量脉搏血氧饱和度的能力。
共招募了119名参与者（中位年龄16岁，55%为男性）。118名（99.2%）参与者在浸入水中后，至少从一个测量部位获得了有用的脉搏血氧饱和度波形。浸入水中后，96%的参与者在鼻孔处可获得可用波形，手指处为92%，耳垂处为41%。耳垂处成功的可能性显著低于手指或鼻子（分别为41%对92%和96%，两项比较p均<0.0001）。手指和鼻孔处相似。浸入水中后，鼻孔处（100%对100%，p = 0.537）和手指处（100%对100%，p = 0.032）的血氧饱和度无显著差异，但耳垂处不同（100%对96%，p < 0.0001）。
本研究表明，脉搏血氧饱和度测定法在一大群浸入水中30分钟的参与者中是可行且可靠的。结果支持鼻孔为最可靠的部位。仅应使用注册用于临床的脉搏血氧仪进行患者护理。
