Montserrat JM, Lloberes P, Ballester E, Rodriguez-Roisin R; International Society of Technology Assessment in Health Care. Meeting.
Annu Meet Int Soc Technol Assess Health Care Int Soc Technol Assess Health Care Meet. 1997; 13: 122.
Hospital Clinic, Department de Medicina, Universitat de Barcelona, Spain.
Because of the high demands of sleep studies for diagnostic and CPAP titration purposes in patients with suspected or known sleep apnea/hypopnea syndrome (SAHS), alternatives to full polysomnography (PSG) are required. Automatic CPAP (auto-CPAP) is engineered to automatically adjust a positive pressure to the upper airway in response to apnea, hypopnea, airflow limitation or snoring occurrence. AIM: To investigate the performance of auto-CPAP in response to sleep respiratory disturbances and to assess the value of partially attended auto-CPAP regulation as an alternative method to the conventional polysomnography-controlled CPAP titration. MATERIAL AND METHODS: Study 1): in 9 patients we evaluated the auto-CPAP performance through full PSG. Study 2): the optimal CPAP obtained using full PSG was compared to that obtained with auto-CPAP in 20 patients with SAHS. RESULTS: 1) The auto-CPAP pressure increase in response to apneas was fast (3.1 +/- 2.1 min); 2) After adequate CPAP was reached, up and downwards fluctuations of CPAP level had no significant effect on sleep fragmentation; and 3) there were no significant differences between optimal CPAP level achieved during full PSG with that obtained with auto-CPAP. CONCLUSIONS: Although pressure increase until first stabilization is rapid, auto-CPAP performance has no significant influence on sleep fragmentation and allows for a reasonable choice of CPAP level to abolish all the respiratory events in most patients. Therefore, most of the patients do not need full PSG for CPAP titration.
Publication Types:
Keywords:
- Continuous Positive Airway Pressure
- Humans
- Polysomnography
- Sleep Apnea Syndromes
- Sleep Deprivation
- Snoring
- Titrimetry
- hsrmtgs
Other ID:
UI: 102233239
From Meeting Abstracts