Original scientific paper
Respiratory response to physical exercise in patients with chronic bronchitis and bronchial asthma
B. Kanceljak-Macan
; Institut za medicinska istraživanja i medicinu rada, Zagreb, Hrvatska
E. Žuškin
; Škola narodnog zdravlja »Andrija Štampar« Medicinskog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
F. Pavičić
; Klinika za plućne bolesti Medicinskog fakulteta Sveućilišta u Zagrebu, Zagreb, Hrvatska
Abstract
Respiratory function before and after exercise was analysed in 15 patients (seven with chronic bronchitis and eight with bronchial asthma). The patients were selected on the basis of increase in airway resistance (Raw) of 50% or more after exercise. The patients were tested on a treadmill under a load ranging from 50 to 120 W. Airway resistance, specific airway conductance (SGaw), one-second forced expiratory volume (FEV1) and maximum expiratory flow rate at 50% vital capacity (FEF50) were measured before and again at 5 and 20 minutes after exercise. Arterial partial oxygen pressure (Pa02) was measured before exercise and immediately after it. The patients with chronic bronchitis demonstrated an average increase in Raw after exercise (5 min: + 127%: 20 min: + 96%) and an average decrease in FEF50 (5 min: -12%, 20 min.: -10%). Patients with bronchial asthma demonstrated after exercise an average increase in Raw (5 min: + 147%, 20 min: + 105%) and an average decrease in FEF50 (5 min: - 24%, 20 min: - 21%). The data analysed show a significant decrease in FEF50 5 and 20 minutes after exercise in patients with bronchial asthma, while in patients with chronic bronchitis decrease in FEF50 was not significant. There was a significant increase in Raw as long as 20 minutes after exercise in patients with chronic bronchitis. In patients with bronchial asthma increase in Raw 20 minutes after exercise was not significant indicating better spontaneous reversibility of increased Raw in asthmatics. Pa02 did not show significant changes after exercise in respect to the values before exercise in asthmatic patients. In bronchitic patients there was a significant average increase in Pa02 after exercise (P < 0,01 )
Keywords
Hrčak ID:
152821
URI
Publication date:
31.1.1989.
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