PDF(Pubmed)
Abstract：
BACKGROUND: Acoustic respiration rate (RRa) monitoring is a method of continuously measuring respiratory rate using a signal from an acoustic transducer placed over the airway. The purpose of the present study is to examine how the averaging time and respiratory pause time settings of an RRa monitor affect the detection time of sudden respiratory rate changes.
METHODS: A total of 40 healthy adult volunteers were included in the study. First, we measured the apnea detection time (apnea test) by dividing them into two groups (N = 20 each), one with a respiratory pause time setting of 20 s and the other with 40 s. Each group performed two apnea tests with an averaging time setting of 10 and 30 s. Next, we measured the tachypnea detection time (tachypnea test) for half of the subjects (N = 20) with two averaging time settings of 10 and 30 s. For each test, three measurements were taken, and the average of the three measurements was recorded.
RESULTS: There was no significant difference in the apnea detection time between the averaging time set at 10 and 30 s regardless of whether the respiratory pause time was set at 20 or 40 s. However, the apnea detection time was significantly shorter with the respiratory pause time of 20 s than 40 s, regardless of whether the averaging time was set at 10 or 30 s (p < 0.001). The tachypnea detection time was shorter with the averaging time of 10 s than 30 s (p < 0.001). Furthermore, the apnea detection time and tachypnea detection time were much longer than the actual settings.
CONCLUSIONS: The results of the current study show that in the measurement of RRa, the apnea detection time is more affected by the respiratory pause time setting than the averaging time setting; however, the tachypnea detection time is significantly affected by the averaging time setting.
METHODS: A total of 40 healthy adult volunteers were included in the study. First, we measured the apnea detection time (apnea test) by dividing them into two groups (N = 20 each), one with a respiratory pause time setting of 20 s and the other with 40 s. Each group performed two apnea tests with an averaging time setting of 10 and 30 s. Next, we measured the tachypnea detection time (tachypnea test) for half of the subjects (N = 20) with two averaging time settings of 10 and 30 s. For each test, three measurements were taken, and the average of the three measurements was recorded.
RESULTS: There was no significant difference in the apnea detection time between the averaging time set at 10 and 30 s regardless of whether the respiratory pause time was set at 20 or 40 s. However, the apnea detection time was significantly shorter with the respiratory pause time of 20 s than 40 s, regardless of whether the averaging time was set at 10 or 30 s (p < 0.001). The tachypnea detection time was shorter with the averaging time of 10 s than 30 s (p < 0.001). Furthermore, the apnea detection time and tachypnea detection time were much longer than the actual settings.
CONCLUSIONS: The results of the current study show that in the measurement of RRa, the apnea detection time is more affected by the respiratory pause time setting than the averaging time setting; however, the tachypnea detection time is significantly affected by the averaging time setting.
摘要：
背景：声呼吸率（RRa）监测是一种使用来自放置在气道上的声换能器的信号连续测量呼吸率的方法。本研究的目的是研究RRa监测器的平均时间和呼吸暂停时间设置如何影响突然呼吸率变化的检测时间。
方法：共纳入40名健康成年志愿者。首先,我们通过将它们分为两组（每组N=20）来测量呼吸暂停检测时间（呼吸暂停测试），一组呼吸暂停时间设置为20s，另一组为40s。每组进行两次呼吸暂停测试，平均时间设置为10和30s。接下来，我们测量了一半受试者（N=20）的呼吸急促检测时间（呼吸急促测试），两个平均时间设置为10和30s。对于每个测试，进行了三次测量，并记录三次测量的平均值。
结果：无论将呼吸暂停时间设置为20或40s，平均时间设置为10和30s之间的呼吸暂停检测时间都没有显着差异。但是，呼吸暂停时间为20s时，呼吸暂停检测时间明显短于40s，无论平均时间设置为10或30s（p<0.001）。平均10s的呼吸急促检测时间短于30s（p<0.001）。此外，呼吸暂停检测时间和呼吸急促检测时间比实际设置长得多.
结论：当前研究的结果表明，在RRa的测量中，呼吸暂停检测时间受呼吸暂停时间设置的影响大于平均时间设置;然而,平均时间设置显著影响呼吸急促检测时间。
方法：共纳入40名健康成年志愿者。首先,我们通过将它们分为两组（每组N=20）来测量呼吸暂停检测时间（呼吸暂停测试），一组呼吸暂停时间设置为20s，另一组为40s。每组进行两次呼吸暂停测试，平均时间设置为10和30s。接下来，我们测量了一半受试者（N=20）的呼吸急促检测时间（呼吸急促测试），两个平均时间设置为10和30s。对于每个测试，进行了三次测量，并记录三次测量的平均值。
结果：无论将呼吸暂停时间设置为20或40s，平均时间设置为10和30s之间的呼吸暂停检测时间都没有显着差异。但是，呼吸暂停时间为20s时，呼吸暂停检测时间明显短于40s，无论平均时间设置为10或30s（p<0.001）。平均10s的呼吸急促检测时间短于30s（p<0.001）。此外，呼吸暂停检测时间和呼吸急促检测时间比实际设置长得多.
结论：当前研究的结果表明，在RRa的测量中，呼吸暂停检测时间受呼吸暂停时间设置的影响大于平均时间设置;然而,平均时间设置显著影响呼吸急促检测时间。
