iPhone App Compared to Standard RR-measurement During Stress Testing
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Enrollment
- 220
- Locations
- 2
- Primary Endpoint
- Absolute difference between conventional blood pressure measurements and the corresponding iPhone blood pressure estimations
Study Overview
Brief Summary
The iPARR DELTA BP Study is designed to evaluate whether a new smartphone app using the photoplethysmography signal of the inbuilt camera can measure blood pressure (BP) fluctuations with sufficient correlation compared to the goldstandard oscillometric BP measurements. Investigators will recruit patients who are scheduled for a routine treadmill stress test and assess their blood pressure before and right after the test with the smartphone app and the standard BP measurements on the opposite upper extremity. Pronounced BP fluctuations are encountered during vigorous activities. The primary endpoint of the iPARR DELTA BP Study is the correlation of the absolute difference of subsequent measurements between both techniques. If the relative chances of BP fluctuations are sufficiently assessed with this new device, BP fluctuations could be monitored continuously after calibration.
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Primary Purpose
- Diagnostic
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to 99 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •able to give informed consent
Exclusion Criteria
- •atrial fibrillation
- •medical reasons why blood pressure measurement is not possible at the upper extremity (Shunt, Lymphedema)
Arms & Interventions
Blood pressure measurement
six repetitive blood pressure measurements with iPhone and conventional oscillometric cuff device during stress testing will be performed
Intervention: cuff device (Device)
Blood pressure measurement
six repetitive blood pressure measurements with iPhone and conventional oscillometric cuff device during stress testing will be performed
Intervention: iphone (Device)
Outcomes
Primary Outcomes
Absolute difference between conventional blood pressure measurements and the corresponding iPhone blood pressure estimations
Time Frame: 1 day
Difference between the delta of two sequential oscillometric measurements and the delta of the two corresponding blood pressure estimates calculated from the PPG signal of an iPhone 4S
Secondary Outcomes
- Number of measurement failures(1 day)