IOS impulse spirometry

Spirometric and airway resistance diagnostics combined in one compact device.

Tidal breathing analysis with Impulse Oscillometry (IOS) has demonstrated to be informative and differentiated in the early detection and follow up of pulmonary diseases like asthma, COPD and idiopathic pulmonary fibrosis. Therefore IOS oscillometric airway measurements complement spirometry.

  • Almost independent of patient cooperation, IOS can test a larger patient range than spirometry alone, from children, adult and geriatric patients.
  • Assessment and differentiation of airway function under quiet breathing conditions.
  • Sensitive and early detection of pulmonary obstruction. View More...
  • Allows differentiation of central (proximal) airways resistance and peripheral (distal) airways resistance.
  • Bronchodilator therapy often does not reach the peripheral airways. IOS can provide objective response to drug therapy even when FEV1 can't.
  • Monitor the effect of bronchial provocation on airway tone.
  • Automated classification and interpretation of test results.
Flow/volume measurements
Range:0 to ±20 L/s
Resolution:10 mL/s
Accuracy:0.1 to 14 L/s ±5% or 0.2 L/s (whichever is greater) or 0.2 to 12 L/s: ±2% or L/s (whichever is greater)
Resistance:< 0.05 kPa/L/s (0.5cmH2O/L/s) at 10 L/s
CMRR:60 dB at 50 Hz
Range:± 20 L
Accuracy:0.5 to 8 L: ± 3% or ± 0.05 L (whichever is greater)
Range:1 mL
MOUTH PRESSURE (PM)Type:Piezo Resistive
Range:± 2 kPa (±15 mmHg)
Accuracy:± 2%
Resolution:0.003 kPa (0.023 mmHg)
CMRR60db at 50Hz
TEST SIGNALType:Impulse of alternating direction
Pulse interval:0.1 to 6 sec
Impulse length:45 ms
Frequency Range of single impulse: 0 to 100 Hz
Power spectrum:-20 dB at 40 Hz
CALIBRATIONReference Impedance:0.2 kPa/(L/s) (2 cmH2O/(L/s))
Accuracy:< ± 2%

Due to continual product innovation, CareFusion designs and specifications are subject to change without notice.

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