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Evidence & resources
Evidence you can examine.
Respiratory insights you can trust.
Explore clinical studies, technical documentation, case studies and product-specific regulatory information.
Browse all resources →Better respiratory care through evidence
OscillometryResistance vs frequency
Illustrative trace — not patient data.
Product-specific regulatory information
Product documentation, regional availability and intended use, stated per device.
Product status and documentation
US FDA 510(k) cleared · CDSCO approved (2022) · ISO 13485 · MDSAP.
Regional availability and intended use
Available in India and the United States. Intended for pulmonary function testing in adults and children.
Product status and documentation
US FDA 510(k) pending — not cleared · CDSCO approved · ISO 13485 · MDSAP.
Regional availability and intended use
Available in India. Intended for measuring respiratory impedance during tidal breathing.
Language note: a 510(k) is a clearance, not an approval. All copy and imagery should say “FDA cleared”.
How we evaluate performance
Our solutions are developed and evaluated using established scientific methods and industry standards. This section explains key aspects of our approach.
Measurement
We assess the accuracy, repeatability and reliability of our measurements across a range of conditions.
Test quality
We use objective quality criteria to support reliable and reproducible testing in clinical practice.
Clinical interpretation
Our tools provide clear, standardised outputs to help clinicians interpret results in context.
Charts are illustrative of method, not results from a specific study. Replace with real validation data before publication.
Research & collaborations
Materials related to research, scientific exchange and real-world implementation.
Published research
Peer-reviewed publications relevant to our technology and its clinical applications.
View resourcesPosters & presentations
Conference posters, presentations and other scientific materials.
View resourcesImplementation reports
Real-world implementation and use in clinical settings.
View resourcesWhere the platform is in use
Confirm current logo usage permission for each organisation before publication.
Specifications & standards
| Spirometry standards | ATS/ERS. Acceptability and repeatability implemented as automated validators: cough, early termination, incomplete exhalation, excessive extrapolated volume, cessation of airflow. |
| Oscillometry standards | ERS 2020 (King et al., ERJ 2020;55:1900753) — ≥3 accepted breath cycles, CoV ≤10% adults / ≤15% children. Conformance statement to be published. |
| Reference equations | GLI and ethnicity-aware Indian reference values, reported as Z-scores with lower limit of normal, plus derived lung age. |
| Interoperability | HL7 FHIR diagnostic reports · ABDM Health Information Provider · OAuth 2.0 / JWT |
| Device datasheets | Weight, power, connectivity and validated age range to be published for all devices. |
Frequently asked questions
View all FAQsWhere can I find regulatory documents?
Product status, quality system certification and regional availability are listed per device in the product-specific regulatory section above. For submission-level documentation, contact our regulatory team.
How do spirometry and oscillometry complement each other?
Spirometry measures airflow during a forced manoeuvre; oscillometry measures airway mechanics during quiet breathing. Oscillometry is sensitive to small-airway change earlier, and works on patients who cannot perform a forced manoeuvre. alveoflow® performs both.
Can I request technical documentation?
Yes. Specifications, software requirements, integration guides and sandbox access are available on request — contact our team.
Are Indian reference values supported?
Yes. The platform computes ethnicity-aware Z-scores with lower limit of normal against Indian reference equations alongside GLI, and derives lung age.
Get in touch
Need evidence for your evaluation?
Our team can help you find the right resources for your clinical, technical or regulatory questions.
Research enquiries
Identify distal airway dysfunction that spirometry often fails to detect, enabling intervention months earlier
COPD & Small Airway Disease
Lung Transplant Rejection Monitoring
King, G. G., Bates, J., Berger, P. J., Calverley, P., Dellacà, R. L., Farré, R., et al. (2020). Technical standards for respiratory oscillometry. European Respiratory Journal, 55(2), 1900753
Athavale T, Athavale A. Comparison of Forced Oscillation Technique, Lung Volumes by Body Plethysmography, and Spirometry in Moderate Persistent Adult Asthma. J Assoc Physicians India. 2024 May;72(5):29-35. doi: 10.59556/japi.72.0520. PMID: 38881107
Bhattarai P, Grigorenko M, Lu W, Chia C, Myers S, Sohal SS, Williams A. Early detection of small airway dysfunction in smokers and people with COPD via forced oscillation technique and its association with biomarkers: a pilot study. Am J Physiol Lung Cell Mol Physiol. 2026 Mar 1;330(3):L211-L221. doi: 10.1152/ajplung.00155.2025. Epub 2026 Jan 20. PMID: 41556836
Tirelli C, Mira S, Italia M, Maggioni S, Intravaia C, Zava M, Contino S, Parazzini EM, Mondoni M. Applications of Forced Oscillatory Technique in Obstructive and Restrictive Pulmonary Diseases: A Concise State of the Art. J Clin Med. 2025 Aug 12;14(16):5718. doi: 10.3390/jcm14165718. PMID: 40869544; PMCID: PMC12386753
Clinical Research & Data Inquiry
alveoflow® is committed to scientific transparency. For medical professionals and researchers seeking detailed validation studies, raw data metrics, or collaboration on prospective clinical trials, our medical science team is available for consultation
COVID-19 and respiratory recovery
Oscillometry and spirometry help assess lasting changes in respiratory mechanics after COVID-19 infection
Post-COVID respiratory symptoms can persist long after recovery, and small-airway changes may not appear in a standard spirometry result. Oscillometry measures resistance and reactance during quiet breathing, which is sensitive to peripheral airway change
Testing without forced effort
Patients recovering from severe infection often cannot produce a maximal forced exhalation. alveoflow® measures during tidal breathing, so assessment is possible when spirometry is not
Repeat testing on the same platform tracks recovery over months, with results held against one patient record