# VentRef — Vent & Oxygenation Reference

> Clinical reference for mechanical ventilation and oxygen therapy management. (iPhone/iPad app by Rishi Kumar.)

- Source: https://appshunter.io/ios/app/ventref/id6756503414 (this page in markdown: same URL + `.md`)
- Developer: [Rishi Kumar](https://appshunter.io/developer/1434016052)
- Category: Medical, Reference
- Price: Free
- Rating: 5.00/5 from 42 App Store ratings · 3 written reviews indexed
- Age rating: 17+
- Requires: iOS 26.0 · 27 MB
- Languages: American English
- Released: 2025-12-18
- Data updated: 2026-08-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ventref/id6756503414/reviews.md

## What is VentRef?

VentRef is a focused clinical reference for clinicians managing invasive and noninvasive mechanical ventilation and oxygen therapy, grounded in core respiratory physiology and evidence-based critical care practice.

This application is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Calculations and reference values are derived from published peer-reviewed medical literature and textbooks cited in the Sources section of the app. Always seek the guidance of a qualified healthcare professional with any questions regarding medical conditions or clinical decisions, and do not disregard or delay seeking professional advice because of information provided by this app.

About Rishi Kumar, MD, FACC ("RK.MD")
I'm an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist practicing in academic medicine. I'm passionate about teaching with free, open-access medical education. Learn more on my site: https://rk.md

## Key features

- Mechanical ventilation reference
- Oxygen therapy reference
- Respiratory physiology
- Evidence-based critical care
- Clinical decision support

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/ventref/id6756503414/reviews.md

### 5/5 — Extremely helpful and educational

*2026-07-24*

I recently downloaded this app as a medical student applying to anesthesiology residency in his year to familiarize myself with the ventilator as I go through clinical rotations. And I have to say this is one of the most comprehensive sources I’ve found about ventilators. And it’s not just about 1 type of ventilator. There is so much information about the different kinds of elevators and discussion of the physiology. Can’t recommend enough to those in anesthesiology, critical care, and high acuity settings. Dr. Rishi Kumar is clearly an amazing educator! He has several other apps he developed as well that are worth checking out!

**Developer response:** Extremely kind and humbling comment! So glad you find the app useful!

### 5/5 — Amazing!

*2026-01-06*

VentRef is a clear, reliable, and well-organized clinical reference grounded in evidence-based critical care practice. An excellent quick-reference tool for clinicians and trainees.

### 5/5 — Finally!!!!!

*2025-12-27*

❤️❤️❤️

## Frequently asked questions about VentRef

### What is VentRef used for?

VentRef is a clinical reference tool designed for healthcare professionals to manage invasive and noninvasive mechanical ventilation and oxygen therapy. It is grounded in core respiratory physiology and evidence-based critical care practice.

### Is VentRef suitable for medical advice?

No, VentRef is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek guidance from a qualified healthcare professional.

### Where does VentRef get its information?

Calculations and reference values within VentRef are derived from published peer-reviewed medical literature and textbooks, which are cited in the app's Sources section.

### Who developed VentRef?

VentRef was developed by Rishi Kumar, MD, FACC, an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist passionate about free, open-access medical education.

### What devices does VentRef support?

VentRef is available for iPhone and iPad devices.

### How often is VentRef updated?

The latest version of VentRef is 1.3, last updated on February 4, 2026. The app was initially released on December 18, 2025.

### What is the age rating for VentRef?

VentRef has an age rating of 17+, indicating it is suitable for mature users due to its clinical and medical content.

### Does VentRef contain advertisements?

No, VentRef does not contain advertisements. It is a free application without any in-app purchases or ads.

## Version history (last 5 releases)

### 1.7 — 2026-07-22

Added: Many more calculators, terms, and definitions
Updated: Improved text layout and readability
Updated: Calculator logic

### 1.6 — 2026-07-04

Added: Clinical section with common vent modes
Updated: User interface refinements to provide a consistent experience between RKRef apps

### 1.5 — 2026-05-18

Added: New sections for invasive ventilation, artificial airways, and airway adjuncts
Added: Tracheostomy Tube, Laryngectomy Tube, Speaking Valve, Heat Moisture Exchanger (HME), Trach Collar, Laryngectomy Stoma Care, Endotracheal Tube (ETT), Tracheal Cuff Management, Ventilator Circuit Basics, Oropharyngeal Airway (OPA), Nasopharyngeal Airway (NPA), Bag-Valve-Mask (BVM)
Updated: Significant backend codebase changes for efficiency

### 1.4 — 2026-05-07

Added: Desired CO2, Mechanical Power, Inspiratory Time, I:E Ratio, Mean Airway Pressure, Alveolar Gas Equation, ARDS Severity, Winter’s Formula, ROX Index calculators
Added: ROX Index, NIV Failure, Static Compliance, Dynamic Compliance, Mean Airway Pressure, Derecruitment, Overdistension, Airway Resistance, Recruitment, Dead Space Fraction, Ventilatory Ratio, PaCO₂ EtCO₂ Gradient, Oxygenation Index, Oxygen Saturation Index, Mechanical Power, Patient Self Inflicted Lung Injury, Oxyhemoglobin Dissociation Curve, Absorption Atelectasis, Permissive Hypercapnia, Flow, Expiratory Flow Limitation, Cuff Pressure, Airway Protection, Occlusion Pressure P0.1, Tube Resistance, T Piece terms
Updated: Adjusted user interface elements for References tab
Updated: Noninvasive oxygen therapy descriptions
Updated: DO₂, HFNC, CPAP, BiPAP, PEEP, Lung Protective Ventilation, ARDS, Prone Positioning terms

### 1.3 — 2026-02-04

Added: APRV/Bilevel mode
Added: Adjustable parameters for ventilator modes
Added: Zero End Expiratory Pressure (ZEEP), Jackson-Rees circuit, Mapleson circuit terms, Extubation Criteria, Diaphragmatic Dysfunction, Accessory Muscle Use, Negative Inspiratory Force (NIF), Rapid Shallow Breathing Index (RSBI), Vital Capacity, Heart and Moisture Exchanger (HME), Heliox, Tracheostomy, Passy Muir Valve, Bronchopleural Fistula (BPF), Cough Assist
Updated: Fixed full-screen constraints for vent images

## Apps similar to VentRef

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Emergency Manual](https://appshunter.io/ios/app/emergency-manual/id6446658508) | 5.0 (12) | Free | Medical |
| [VentXplorer](https://appshunter.io/ios/app/ventxplorer/id6747533157) | 5.0 (1) | Free | Medical |
| [ABG Calculator - Pulmoro](https://appshunter.io/ios/app/abg-calculator-pulmoro/id6753176045) | 5.0 (7) | Free | Medical |
| [Mechanical Ventilation Expert](https://appshunter.io/ios/app/mechanical-ventilation-expert/id1591944892) | 1.9 (7) | Free | Medical |
| [RTB2 – Respiratory Reference](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847) | 5.0 (2) | Free | Medical |
| [Rapid Vent Calculator](https://appshunter.io/ios/app/rapid-vent-calculator/id6451494244) | 5.0 (45) | Free | Medical |

## More apps by Rishi Kumar

- [EchoRef](https://appshunter.io/ios/app/echoref/id1434016053)
- [CoagRef](https://appshunter.io/ios/app/coagref/id6748641864)
- [LabRef](https://appshunter.io/ios/app/labref/id6751020319)
- [EBMRef](https://appshunter.io/ios/app/ebmref/id6751447390)
- [ECGRef](https://appshunter.io/ios/app/ecgref/id6757675855)

All apps by Rishi Kumar: https://appshunter.io/developer/1434016052

## Related topics

[respiratory therapy](https://appshunter.io/ios/topics/respiratory-therapy) · [ventilator mode map](https://appshunter.io/ios/topics/ventilator-mode-map) · [ventilator guide](https://appshunter.io/ios/topics/ventilator-guide) · [paediatric intensive care](https://appshunter.io/ios/topics/paediatric-intensive-care)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*