# CPAPdata > Every night on your ResMed SD card, explained in plain words and checked value by value. Verified accounts, data hosted in Europe. Built by a sleep technologist. ## Notes - Built by a clinician: 20 years in sleep medicine, not just software. - Hosted in Europe: Your health data stays in the EU. Not the USA. - Verified accounts: Every sign-up is verified: no anonymous access, no bots. - Every brand, one place: ResMed today. Löwenstein & Philips next. - Contact: hello@cpapdata.com ## Key resources - [Access with a verified account](https://www.cpapdata.com/): CPAPdata is used with a verified account. Sign up to be told when access opens. - [Mask Finder](https://www.cpapdata.com/mask-finder): Answer 4 quick questions to find your best-fit CPAP mask type. - [Understand your CPAP data](https://www.cpapdata.com/learn): What AHI, leak, EPR, central apnea and flow limitation actually mean on your CPAP report, explained by a sleep technologist with 20 years in the field. (8 terms) - [CPAPdata compared](https://www.cpapdata.com/compare): An honest comparison of the tools that read CPAP data: OSCAR, SleepHQ, ResMed myAir and CPAPdata. What each one is genuinely best at, and when to pick it. ## CPAPdata compared - [CPAPdata vs OSCAR](https://www.cpapdata.com/compare/cpapdata-vs-oscar): OSCAR wins on depth and breadth. We win on getting an answer in under a minute, in your own language. - [CPAPdata vs SleepHQ](https://www.cpapdata.com/compare/cpapdata-vs-sleephq): SleepHQ wins on convenience and community. We win on European hosting, on accuracy checked value by value against OSCAR and the machine's own summary, and on speaking your language. - [CPAPdata vs myAir](https://www.cpapdata.com/compare/cpapdata-vs-myair): myAir is effortless and motivating. It is not a data tool, and it is not trying to be. ## Understand your CPAP data - [AHI, Apnea-Hypopnea Index](https://www.cpapdata.com/learn/ahi-apnea-hypopnea-index): The average number of breathing events per hour of therapy. It is the single number most clinicians look at first. - [Leak, Mask leak rate](https://www.cpapdata.com/learn/cpap-mask-leak): Air escaping around the mask or through the mouth. Past a threshold it stops your machine from detecting events reliably. - [Central apnea, reported as Clear Airway](https://www.cpapdata.com/learn/central-apnea-clear-airway): A pause where your airway is open but no effort is made to breathe. It comes from the brain, not from the throat. - [EPR, Expiratory Pressure Relief](https://www.cpapdata.com/learn/epr-expiratory-pressure-relief): A comfort setting that drops the pressure while you breathe out, by 1, 2 or 3 cmH2O. - [Compliance, or usage hours](https://www.cpapdata.com/learn/cpap-compliance-usage-hours): How many hours per night you actually wear the mask. In Belgium it also decides whether your therapy stays reimbursed. - [Flow limitation, Inspiratory flow limitation](https://www.cpapdata.com/learn/flow-limitation): A partly narrowed airway that never closes enough to score as an event. It is the earliest visible sign of obstruction. - [APAP vs CPAP, Auto-adjusting versus fixed pressure](https://www.cpapdata.com/learn/apap-vs-cpap): CPAP delivers one pressure all night. APAP moves within a range, following what your airway needs. - [95th percentile pressure](https://www.cpapdata.com/learn/95th-percentile-pressure): The pressure your machine stayed below for 95 percent of the night. The most honest single figure for what your therapy needs. ## Main topic: reading CPAP data Straight answers about CPAP data, from someone who reads it every day. ### What is a normal AHI on CPAP therapy? Most clinicians consider therapy well controlled when the AHI stays under 5 events per hour, and under 1 is excellent. A single bad night is rarely meaningful on its own. Look at the trend across several weeks, and bring it to your care team rather than changing anything yourself. ### How do I read my ResMed SD card? Take the SD card out of your machine, put it in a card reader, and drop the whole folder onto CPAPdata. We read the STR.edf summary file and the DATALOG folder that your AirSense or AirCurve writes every night. Nothing is uploaded: the files are parsed inside your browser. ### Does my CPAP data leave my browser? The card is read in your browser. Only the nights you choose to save go to your account, hosted in the European Union. ### What counts as a large leak, and why does it matter? On a ResMed device, a leak above roughly 24 litres per minute is flagged as a large leak. Past that threshold the machine can no longer detect events reliably, so a very leaky night can show a falsely reassuring AHI. Leak is usually a mask fit or mouth breathing problem, not a machine problem. ### Which CPAP machines does CPAPdata support? ResMed AirSense and AirCurve devices, which write standard EDF files, work today. Löwenstein Prisma and Philips DreamStation are next. If your machine writes to an SD card, it is on the roadmap. ### Can CPAPdata replace my doctor? No, and it is not meant to. CPAPdata is a self-monitoring and consultation-aid tool: it helps you read your own therapy data and arrive at your appointment with better questions. Any change to your pressure, mask or settings belongs to your prescribing physician. ## Pages - [Legal notice](https://www.cpapdata.com/legal-notice) ## Languages - en: https://www.cpapdata.com/ (https://www.cpapdata.com/llms.txt) - fr: https://www.cpapdata.com/fr (https://www.cpapdata.com/fr/llms.txt) - nl: https://www.cpapdata.com/nl (https://www.cpapdata.com/nl/llms.txt) - de: https://www.cpapdata.com/de (https://www.cpapdata.com/de/llms.txt)