A comparison of the monothermal and bithermal caloric tests.
J Vestib Res
; 13(2-3): 113-9, 2003.
Article
en En
| MEDLINE
| ID: mdl-14757914
This study considered whether the monothermal (MT) caloric test could predict the normality of the full conventional bithermal (BT) caloric test, and therefore be an alternative to full caloric investigation. This would have the advantages of reducing test time and patient discomfort as only two caloric tests would be needed instead of four. 744 BT caloric investigations were examined, and the unilateral weakness and directional preponderance calculated for the BT and the MT stimuli. By defining the BT results as the standard, the false-positive and false-negative results of the MT test were derived. Overall using very strict MT difference criteria of less than 5% and no spontaneous nystagmus, false-negative rates for the cool MT were very low (< 1%) and better than the warm MT (< 7.1%) suggesting that the cool MT was a reliable screen test. However, unacceptably high false-positive rates were produced reflecting more than 3/4 of normal BT results failing the MT criterion. This unacceptable false-positive rate decided against implementing the MT test at our facility. The results of this study however have guided the use of the cool air-stimulus first during BT testing and, when completion of the BT is not possible or inadvisable, satisfying the stringent MT criterion confidently indicates with a probability of > 99% the absence of an abnormal BT result.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Pruebas Calóricas
/
Enfermedades Vestibulares
/
Frío
/
Calor
Tipo de estudio:
Evaluation_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Humans
Idioma:
En
Revista:
J Vestib Res
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Países Bajos