PEAK-FLOW MONITOR

摘要

A peak-flow monitor (10.1) comprises a body or tube (12) having an expiratory air inlet (18) and defining a flow path (14) for the expiratory air. A whistle (16) of the beating reed type is arranged in the flow path (14). The monitor (10.1) includes an annular wall (20) in which are located a plurality of removable pieces (24). In use any one or more of the removable pieces (24) may be removed to form a leak opening of a predetermined and variable size, depending on the size and number of the removable pieces (24) removed, through which part of the expiratory air can blow to bypass the whistle (16). The peak-flow monitor (10.1) is particularly useful in the treatment of asthma.