JHL Consultants

Medical Applications

Overview

BP Companion is a native iOS application designed for patients to record home blood pressure measurements longitudinally over time on their iPhone or iPad. Beyond simple data logging, the application automatically computes four haemodynamically significant derived metrics from each reading: Fractional Pulse Pressure (FPP), Pulse Pressure (PP), Rate-Pressure Product (RPP), and Average Real Variability (ARV). Each metric is displayed with reference ranges and age-stratified normative values, enabling both patients and their treating clinicians to place individual readings into an appropriate clinical context.

The application exports data as both PDF reports and CSV files, facilitating review during consultations and integration with clinical workflows. It is also capable for exporting blood pressure readings and heart rate to the Apple Health APP. This article outlines the physiological basis and clinical interpretation of each derived measurement, with reference to the supporting peer-reviewed literature.

Data Capture

Each entry records the following:

•     Systolic and diastolic blood pressure (mmHg)

•     Heart rate (beats per minute)

•     Date and time of measurement

•     Current medications as free-text entries

Four metrics are computed automatically from these inputs and displayed alongside the raw measurements. Trend graphs and summary statistics are available within the application.

Privacy Policy

No data collected by the app is made available to any external source apart from data transferred by the user to their medical practitioner.