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Spirometry Vs. Oscillometry

Modern healthcare relies on accurate, patient-friendly respiratory machines to assess lung function, diagnose disease early, and monitor treatment response. While spirometry has long been the standard respiratory machine used in pulmonary function labs, newer technologies such as AI-powered oscillometry are redefining how clinicians evaluate airway mechanics.

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Cut-off & Z-score

Z-Scores evaluate patient values relative to normal population curves adjusted for physical factors, making them ideal for precise clinical diagnosis. Cut-Off Values provide quick, fixed reference thresholds, though they do not account for individual growth or biological variations.

Antlia® Cut-off Values

Adults

Suggested cut-off values for Oscillometry by Dr Sundeep Salvi

Only for Adults (>18 years)

1 cmH₂O = 10.197 x kPa/L/s

• R5	4 cmH₂O/L/s
• R19	3 cmH₂O/L/s
• R5-R19	1 cmH₂O/L/s

• X5	-1 cmH₂O/L/s
• AX	4 cmH₂O/L
• Fres	12 Hz

Likely to be different for different devices.
As more and more data will emerge, these cut off values will become sharper

Pediatric

Reference Values for Respiratory Oscillometry Values

Pediatric Population

Age (years)	R5 (cmH₂O/L/s)	X5 (cmH₂O/L/s)	Fres (Hz)
3	14.2	-5.09	Up to 30
5	12.2	-3.56	22
6	10.12	—	—
10	7.13	-2.44	18
15	4.07	-1.0	14

Fres

(Heather Boas, Philadelphia, USA, 2022)

Antlia® Installations

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FAQ's

How to connect the device with laptop

Events

Omega Lung Oscillometry Training at CMC Vellore

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Omega Lung Oscillometry Training at Lucknow

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Publications

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