Differential Diagnosis of Respiratory Dyskinesia: A Prevalence Study Using Computer Analysis of Spirograph Data
✍ Scribed by TADASHI NISHIKAWA; HIROO KUWAHARA; TERUO HAYASHI; SHIGETO YAMAWAKI; MASATOSHI TANAKA
- Book ID
- 101279529
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 104 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0885-6222
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✦ Synopsis
A survey of respiratory dyskinesia for 248 inpatients receiving neuroleptic drugs was undertaken to explore the prevalence and subtype of respiratory dyskinesia using computer analysis of spirograph data monitored by both a Somniprobe nasal thermistor and a strain-gauge. By clinical examination, 23 patients showing irregular respiratory rate, tachypnea, or grunting were suspected to have respiratory dyskinesia. These 23 patients were then examined by nasal thermister for air ¯ow, and strain gauge for thoracic movement. The coecient of variation (CV) in distance from bottom to bottom of respiratory movements over 3 min was measured for each patient. For seven patients, their CVs were 2 SD greater than the mean CV found among 10 normal controls. The number of bursts of air ¯ow (thermistor) was subtracted from the number of respiratory movements (strain gauge) as an estimate of desynchronization or obstruction. For three patients, this dierence was 2 SD greater than the mean dierence found among 10 normal controls. All three of these desynchronized' or obstructive' patients were among the seven who met `irregularity' criteria as above. The prevalence of respiratory dyskinesia was 2 . 8 per cent (seven out of 248 subjects surveyed) and 13 per cent among those with TD populations. Respiratory dyskinesia was classi®ed into two subtypes: the obstructive type with irregular respiratory movement and the irregular respiratory type. A computer analysis of spirograph data will be useful for the investigation of respiratory dyskinesia. # 1997 by