DEVICE: Vmax (10846446021387)

A device used to measure the function of the respiratory system in adults and compliant children. It usually includes a spirometer with volume-sensing (e.g., rolling-seal, bellow) and flow-sensing (e.g., pneumotachometer) devices, a gas analyser for evaluation of absolute lung volumes and gas-diffusing capacity of the lungs, and computer capabilities for data processing and recording; a total-body plethysmograph to measure both lung volumes and airway resistance may be included. The device is mostly used for outpatient or presurgical screening, and may also be used in the diagnosis and evaluation of common diseases in older children [e.g., asthma, cystic fibrosis (CF), chest deformities].

A computerized instrument designed to assess lung volume, flow, and mechanical parameters (including airway compliance and resistance) in young children and infants. It is different from an adult version in absolute dimensions and in the special procedures required for adaption to the pediatric patient (e.g., use of a small constant-volume chamber in which the infant reclines for plethysmography, use of a pressure jacket to obtain forced exhalation); also, parameters that require subject cooperation (e.g., vital capacity, forced expiratory volume) can't be determined. The device is used for pulmonary function testing in diagnostic studies and for evaluation of diseases and chest deformities.