[Diagnostic role of pulse transit time in children with sleep disordered breathing].
OBJECTIVE
To explore the diagnostic value of pulse transit time (PTT) in children with sleep disordered breathing(SDB).


METHODS
Forty eight randomly selected snorers (2 - 13 years) with SDB were examined by PSG and PTT in the same time. Data obtained were analyzed by different technicians respectively. Statistics and analysis of the data were performed.


RESULTS
Apnea hypopnea index (AHI), obstructive apnea index (OAI), the lowest oxygen and micro-arousal index were obtained by PSG and PTT. The results was described as M [25 percentile; 75 percentile]: 4.9[1.3;10.1], 4.6[1.5;11.8]; 1.2[0.7;4.9], 1.3[0.6;5.0]; 0.93[0.85;0.95], 0.93[0.84;0.95]; 14.5[12.6;16.4], 26.0[17.4;30.6]. The difference of AHI, OAI, and the lowest oxygen were not significant (P > 0.05), while the PTT arousal index detection rate was higher than PSG (Z = -5.19, P < 0.01). There was no significant difference in the diagnosis of obstructive sleep apnea-hypopnea syndrome (OSAHS) and determination of degree of patient's condition (P > 0.05). PTT could identify upper airway resistance syndrome in children without OASHS.


CONCLUSIONS
Both methods can be used to diagnose SDB. However, PTT is easy to use and suitable for the diagnosis of SDB in children, especially for UARS.
Department of Otorhinolaryngology, Guangzhou Children's Hospital, Guangzhou 510120, China.
Jian-wen
JW
Zhong
Da-bo
DB
Liu
Zhen-yun
ZY
Huang
Zong-yu
ZY
Tan
Jian-bo
JB
Shao
Shu-yao
SY
Qiu
Jie
J
Yu
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D017286:Polysomnography; D011674:Pulse; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000503:physiopathology*