Abdulhamid I, Vauthy P A, Barnett B A, Hufford D R, Reddy R P, Hunt C E
Department of Pediatrics, Medical College of Ohio, Toledo 43699-0008.
Pediatr Pulmonol. 1992 Aug;13(4):245-9. doi: 10.1002/ppul.1950130413.
To determine whether the addition of air flow and O2 saturation (SaO2) channels improves sensitivity of the pneumogram in identifying cardiorespiratory pattern abnormalities, 2- and 4-channel pneumograms (PG-2 and PG-4) were simultaneously recorded in 91 consecutive infants. Forty-one infants (45%) had cardiorespiratory symptoms, and 50 were asymptomatic. Pneumograms were considered abnormal for any of the following: apnea greater than or equal to 20 seconds, heart rate less than 80 bpm for greater than 5 seconds in preterm and less than 60 bpm in full-term infants (bradycardia), shorter apnea with bradycardia or desaturation, periodic breathing greater than 7% of total sleep time in preterm and greater than 4% in full-term infants, or SaO2 less than 85% for greater than 5 seconds. Both recordings were normal in 72% of infants and abnormal in 24%. In only 4% were the PG-4 abnormal when the PG-2 were normal, in all instances due to minimum SaO2 levels of 77-84% for 5-19 seconds associated with central apnea of intermediate duration (three infants) or with mixed apnea. The difference in frequency of abnormal results between the PG-2 and PG-4 recordings was not statistically significant (X2). In conclusion, although PG-4 do increase the scope of physiological information obtained in infants with cardiorespiratory events, this short-term study does not establish whether this increase results in any long-term benefits. Further, at least in this number and these types of at-risk infants, PG-4 do not improve the sensitivity of cardiorespiratory recordings for detecting abnormalities.
为了确定增加气流和血氧饱和度（SaO2）通道是否能提高呼吸运动图识别心肺模式异常的敏感性，对91例连续的婴儿同时记录了双通道和四通道呼吸运动图（PG - 2和PG - 4）。41例婴儿（45%）有心肺症状，50例无症状。呼吸运动图在出现以下任何一种情况时被视为异常：呼吸暂停大于或等于20秒；早产儿心率低于80次/分钟持续超过5秒，足月儿低于60次/分钟（心动过缓）；伴有心动过缓或血氧饱和度下降的较短呼吸暂停；早产儿周期性呼吸超过总睡眠时间的7%，足月儿超过4%；或血氧饱和度低于85%持续超过5秒。72%的婴儿两种记录均正常，24%异常。仅4%的婴儿PG - 2正常而PG - 4异常，所有这些情况均是由于最低血氧饱和度水平在77 - 84%持续5 - 19秒，伴有中度持续时间的中枢性呼吸暂停（3例婴儿）或混合性呼吸暂停。PG - 2和PG - 4记录结果异常频率的差异无统计学意义（X2）。总之，虽然PG - 4确实增加了在有心肺事件的婴儿中获得的生理信息范围，但这项短期研究并未确定这种增加是否会带来任何长期益处。此外，至少在这类数量和类型的高危婴儿中，PG - 4并未提高心肺记录检测异常的敏感性。
