ABGuru

Blood Gas Analysis Guide

$1.99

Study blood gas analysis with didactic acid-base interpretation, explanations adapted to your learning level, reference cards, bibliography, and Davenport diagram ABGuru is an educational study tool for blood gas interpretation. Enter pH and pCO₂ and get a complete didactic acid-base analysis in seconds, automatically adapted to your training level. Designed for medical students, residents, specialist physicians, and critical care nurses, ABGuru helps you deepen your understanding of acid-base balance, oxygenation, and ABG pathophysiology — on the ward, in the library, or before an exam. ABGuru is for education and study only. It is not a medical device and must not be used to make decisions about real patients. THREE LEARNING LEVELS Choose your profile and get explanations tailored to your training level: • Medical Student — core concepts, reference values, and basic interpretive logic • Resident — pathophysiology, differential reasoning, and clinical correlations • Specialist Physician — advanced technical detail, compensation formulas, and practical implications You can change your learning level at any time in Settings. WHAT ABGURU CALCULATES • Acid-base disorder type using 23 zones in the pCO₂/Base Excess plane • Calculated Base Excess and HCO₃⁻ • Expected compensation with adequacy assessment • Anion gap and delta ratio • Sodium corrected for glucose • Potassium corrected for pH • Lactate analysis • Alveolar-arterial gradient, when arterial oxygenation data are available • P/F ratio and ARDS severity according to Berlin criteria • PaO₂ corrected for PaCO₂ • PaO₂ expected for age • Arterial oxygen content, CaO₂ • Educational correction for venous samples • Interactive Davenport diagram • pCO₂ and pO₂ unit selection: mmHg or kPa STEP-BY-STEP DIDACTIC REASONING ABGuru includes a visual reasoning flow that shows how the interpretation is built step by step. This helps users understand the logic behind the result, rather than simply reading a final answer. TEACHING CARDS WITH REFERENCES Every parameter includes an info button that opens a teaching card with: • Clear explanations • Reference ranges • Formulas and limitations • Scientific sources and citations References include Siggaard-Andersen, Berend, Schlichtig, Emmett & Narins, Sorbini, the Berlin ARDS Definition, and other standard sources in acid-base and respiratory physiology. PRIVACY ABGuru does not require an account or login. The app does not collect or transmit personal, health, or usage data to remote servers. It does not use analytics, advertising, cloud sync, or third-party tracking. Values entered by the user remain on the device only. For convenience, the app may save the last entered exam locally so it can be restored when the app is reopened. This locally saved exam can be removed using the form reset button. Some preferences are also stored locally, such as disclaimer acceptance, learning level, selected units, settings, and changelog state. IMPORTANT NOTICE ABGuru is an exclusively educational application. It is not a medical device, is not intended for clinical use, and must not be used to diagnose, treat, monitor, or make decisions about real patients. It does not replace clinical judgment, official guidelines, laboratory reference standards, or consultation with qualified healthcare professionals.

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What’s new in this version: added sodium correction for hyperglycemia, with a caution note for very high glucose values. Added potassium estimate corrected for pH, with new teaching sheets and bibliographic references for electrolyte corrections. A new didactic reasoning screen is now available: a step-by-step flow chart shows how pH, pCO₂, Base Excess, bicarbonate, expected compensation, anion gap, lactate, and oxygenation are integrated. Added pressure unit selection for pCO₂ and pO₂, in mmHg or kPa. Also improved the Davenport diagram, sample selector, form reset, bibliographic citations, reference accessibility, and overall stability. ABGuru remains an educational tool for learning blood gas interpretation and does not replace clinical judgment.

Version 1.1.6

The developer, Sarah Pirollo, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Information

    Seller
    • Sarah Pirollo
    Size
    • 22 MB
    Category
    • Education
    Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPad
      Requires iPadOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    13+
    • 13+
    • Learn More
    • Infrequent
      Medical Treatment information
    Copyright
    • © 2026 Sarah Pirollo
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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