# eRHC Calculator PRO

> Hemodynamic Calculation Tool

Canonical page: [https://chrome-stats.com/d/id6753905333](https://chrome-stats.com/d/id6753905333)

## Overview

- **ID:** `id6753905333`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Andreas Kuhl
- **Category:** Utilities
- **Version:** 1.6.1
- **Last updated:** 2026-05-05
- **First published:** 2025-10-13
- **Size:** 4.30 MB
- **Data as of:** 2026-09-20
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/erhc-calculator-pro/id6753905333)
- **Website:** [https://kuhl-con.net](https://kuhl-con.net/)
- **Privacy policy:** [https://sites.google.com/view/erhccalculatordatsaprotection/startseite](https://sites.google.com/view/erhccalculatordatsaprotection/startseite)

## Description

eRHC Calculator PRO is a hemodynamic calculator app for qualified healthcare professionals, used during right heart catheterization (RHC) procedures. Here's what it contains:

App Purpose
A clinical calculation and documentation tool for invasive hemodynamic measurements — specifically tied to the ALLAY-HF and ALLAY-HFrEF clinical studies.

Key Features
Patient data management — save/load/share patient records as JSON files, with patient ID, institution, weight/height (kg/lb, cm/in), DOB, and BSA calculation
Multi-stage calculator — timed hemodynamic measurements across stages (rest, exercise, etc.) with vitals, pressures, V-waves, CO via thermodilution or Fick method
Threshold system — configurable alert thresholds with rules (lower/upper bound, range, special PCWP rules)
Time synchronization — reference clock offset for procedure timing
Print/share results — formatted report output
Formula reference — all formulas listed (BSA, mPAP, PCWP, TPG, VO₂, CO, CI, PVR)
Formulas Implemented
BSA: Mosteller (general) and Du Bois (Fick-specific)
mPAP: (sPAP + 2×dPAP) / 3
PCWP from V-Wave: ((V-High − V-Low)/3) + V-Low
TPG: mPAP − PCWP
VO₂: Gender-specific regression equations (Dehmer et al.)
O₂ content: (Sat/100 × Hb × 1.36) + dissolved O₂
CO (Fick): VO₂ / (arteriovenous O₂ difference × 10)
CI: CO / BSA
PVR: (mPAP − PCWP) / CO (in Wood units)

Legal/Info
Developer: Andreas Kuhl, Germany
Fully offline — no data collection, no internet, all data stays on device
Medical disclaimer: intended as a calculation aid only, not for standalone clinical decisions
© 2025-2026 Andreas Kuhl

Clinical References
Citations link to PubMed/journals for Mosteller, Chemla, Rajagopalan, Simonneau, ESC/ERS 2022 PH Guidelines, Du Bois, Dehmer, Severinghaus, Fick, and others.

## Rankings

- #1,329,608 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6753905333)