title: [Efficacies of continuous positive airway pressure on mixed sleep respiratory events in patients with sleep apnea].
abstract: OBJECTIVE
  To explore the efficacies of continuous positive airway pressure (CPAP) for mixed sleep apnea (MSA) events in patients with sleep apnea.
  
  
  METHODS
  A total of 21 patients with sleep apnea whose MSA events >10 events/h on overnight polysomnography (PSG) were studied. They were selected from the Sleep Center, Guangzhou Institute of Respiratory Disease. Ten of them were diagnosed only by conventional polysomnography (PSG group) while the diagnosis of another 11 patients was further confirmed by diaphragm electromyogram (EMG) (EMG group). All of them were treated by CPAP titrated manually on PSG.
  
  
  RESULTS
  Manual CPAP titrating pressure in PSG group was (8.1 ± 2.2) cmH2O (1 cmH2O = 0.098 kPa) and it was similar to that in EMG group ((8.9 ± 1.5) cmH2O). Apnea-hypopnea index (AHI) decreased significantly after CPAP in both PSG group (6.9 (3.5, 10.2) vs 62.2 (54.7, 71.4) events/h) and EMG group (1.5 (0.5, 5.5) vs 71.3 (59.5, 79.5) events/h) (both P < 0.01). CPAP could eliminate MSA diagnosed either by conventional PSG (0.1 (0.0, 0.4) vs 29.6 (19.6, 32.4) events/h) or by diaphragm EMG (0.0 (0.0, 0.2) vs 18.1 (9.1, 19.3) events/h) (both P < 0.01).
  
  
  CONCLUSIONS
  CPAP can effectively treat MSA events in patients with sleep apnea.
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China.
authors.forename: Yingxin
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China.
authors.forename: Baiting
authors.initials: B
authors.lastname: He
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China.
authors.forename: Huichan
authors.initials: H
authors.lastname: Yan
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China.
authors.forename: Jiaxu
authors.initials: J
authors.lastname: Hong
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China.
authors.forename: Jiaying
authors.initials: J
authors.lastname: Luo
authors.affiliation: Sleep Center, First Affiliated Hospital, Guangzhou Medical University, Guangzhou 510230, China. Email: y.m.luo@vip.163.com.
authors.forename: Yuanming
authors.initials: Y
authors.lastname: Luo
mesh_terms: D045422:Continuous Positive Airway Pressure; D004576:Electromyography; D006801:Humans; D017286:Polysomnography; D020181:Sleep Apnea, Obstructive