[Abbreviated diurnal polysomnographic records in the diagnosis of sleep obstructive apnea syndrome].
OBJECTIVE
To demonstrate the validity of diurnal polysomnography for the diagnosis of obstructive sleep apnea syndrome (OSAS).


METHODS
Twenty-five patients with suspect of OSAS were studied with two serial polysomnographic recordings: one during nighttime-nocturnal polysomnography (NPLS) and then a second polysomnographic study during the following morning (DPLS). In both recordings the Sensor Medic Polysomnograph 4250 was used. The certainty OSAS diagnosis was considered when an apnea-hypopnea index (AHI) > or = 10 in the nocturnal recording was obtained. The statistical study was performed with the R-Sigma Horus SA software and sensitivity and specificity values following formulas next indicated.


RESULTS
The male/female ratio was 72%/28%. All patients were snorers and 64% had diurnal hypersomnia. Fourteen out of the 25 patients were true positive, five true negative, five false negative and one false positive patients. The specificity and sensitivity of DPLS were 83% and 73%, respectively, with a positive predictive value of 93% and a negative predictive value of 50%.


CONCLUSIONS
Abbreviated diurnal polysomnographic recordings, performed with conventional polysomnography, have a good sensitivity and specificity for the diagnosis of OSAS. Given the possibility of false negative results in DPLS, a NPLS should be performed in the patient with presumed OSAS and negative diurnal polysomnographic study.
Cordero Montero
P
P
Departamento de Medicina Interna, Hospital Universitario Infanta Cristina, Badajoz.
Márquez Pérez
F L
FL
Rodŕiguez Blanco
I
I
Iñigo Naranjo
P
P
Antona Gómez
J M
JM
Fuentes Otero
F
F
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012680:Sensitivity and Specificity; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000503:physiopathology