Effect of the definition of hypopnea on apnea/hypopnea index
Medicina (B.Aires)
;
63(2): 119-124, 2003. tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-338575
ABSTRACT
The objective of this study was to determine whether different decreases in oxygen saturation (SaO2) or the presence of electroencephalographic arousals (EEGA) in the definition of hypopnea modify hypopnea index and apnea/hypopnea index and the prevalence of obstructive sleep apnea/hypopnea syndrome (OSAHS). A total of 20 polysomnographies performed in patients with OSAHS were analyzed. There are four different definitions of hypopnea > or = 30% reduction in airflow or 50% decrease in abdominal movement associated with decreases SaO2 > or = 3% (type 1); decreases SaO2 > or = 3% or EEGA (type 2); decreases SaO2 > or = 4% (type 3); decreases SaO2 > or = 4% or EEGA (type 4). The prevalence of OSAHS was calculated for an apnea/hypopnea index (AHI) > or = 10 and > or = 15. Hypopnea index (HI) and AHI types 2 and 4 were higher than type 3 (HI type 2 20 +/- 10.6, type 4 18.6 +/- 10, type 3 11.4 +/- 10, p < 0.001; AHI type 2 23.3 +/- 11.6, type 4 21.4 +/- 11.2, type 3 14.7 +/- 11.6, p < 0.001). No differences were observed between HI and AHI types 1 and 2 (HI type 1 17.4 +/- 10, type 2 20 +/- 10.6; AHI type 1 20.6 +/- 11.8, type 2 23 +/- 11.6, p > 0.05). The prevalence of OSAHS was 30-55% in type 3, 70-85% in type 4 (p < 0.05), and 70-85% in types 1 and 2 (p > 0.05). In our patient's population, the presence of EEGA in the definition of hypopnea significantly increased the HI, the AHI and the prevalence of OSAHS when associated with a > or = 4% decrease in SaO2
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Apnea
/
Terminología
Tipo de estudio:
Estudio diagnóstico
/
Estudio de prevalencia
/
Factores de riesgo
Límite:
Adulto
/
Humanos
País/Región como asunto:
America del Sur
/
Argentina
Idioma:
Inglés
Revista:
Medicina (B.Aires)
Asunto de la revista:
Medicina
Año:
2003
Tipo del documento:
Artículo
País de afiliación:
Argentina
Institución/País de afiliación:
Hospital Alemán/AR
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