1. The maximal midexpiratory flow time
- Author
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J.J. Segall and B.A. Butterworth
- Subjects
Pulmonary and Respiratory Medicine ,Spirometry ,Adult ,Male ,medicine.medical_specialty ,Time Factors ,Adolescent ,Pulmonary Fibrosis ,Respiratory Tract Diseases ,Airflow obstruction ,Chest disorders ,Internal medicine ,medicine ,Humans ,Bronchitis ,Aged ,medicine.diagnostic_test ,business.industry ,Respiration ,Ventilatory function ,respiratory system ,Middle Aged ,Asthma ,respiratory tract diseases ,Pulmonary Emphysema ,Chronic Disease ,Cardiology ,Physical therapy ,Female ,business ,Flow time ,circulatory and respiratory physiology - Abstract
Summary In 54 adult subjects (46 patients with chronic chest disorders and 8 normal individuals) the maximal midexpiratory flow-time (MMFT) was found to be closely related to the FEV1%. The MMFT can thus be used as an index for airflow obstruction, and an argument is made for including it in routine clinical spirometry. It is not well related to the FEV1, indicating that it does not test ventilatory capacity. The MMFR was more closely related to the FEV1 than to the FEV1%. It seems less satisfactory than the FEV1 and MMFT as a test of ventilatory function.
- Published
- 1968