Clinical trial NCT02552030: iPhone App Compared to Standard RR-measurement
Official title: iPhone App Compared to Standard RR-measurement - iPARR Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hypertension
Blood Pressure
Lead sponsor: University Hospital, Basel, Switzerland
Sponsor class: OTHER
Collaborators: name: Preventicus GmbH
First posted: 2015-09-16
Enrollment: 1019
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: In this Trial we compare a new application (App) running on an iPhone (Apple inc., Model 4S) to determine systolic blood pressure (RR) and compare it to conventional oscillometric measurements using an Omron HBP-1300-E Pro device. We will include 1000 participants and perform seven repetitive blood pressure measurements (3 iPhone, 4 Omron) in each person. Primary parameter will be the absolute difference (Delta) between the correlating blood pressure measurements in mmHg.

Detailed description: Participants will be asked for consent at the University Hospital Basel at random based on availability. Recruitment is not limited to patients. After consenting patients will accompanied to a RR-measurement unit, positioned in a chair and kept at rest for 4 minutes. Then 7 blood pressure measurements at the same arm will be performed (Cuff/iPhone/Cuff/iPhone/Cuff/iPhone/Cuff). The Cuff measurement results will be documented in the source documents (mmHg) and transferred to a trial database. The iPhone data will be transferred with patient ID to "Preventicus" for calculation of the systolic blood pressure values (mmHg) based on the pulse waves recorded by transillumination of the index fingers of the participants. "Preventicus" will have NO access to the Cuff-measurement data. Then this data will be retransferred to the trial site and merged with help of the patient ID. Absolute and relative differences of the measured (Omron) and calculated (iPhone) systolic blood pressure values (mmHg) for will be calculated and published.

A subgroup of 40 participants will be evaluated in a highly standardized fashion according the ESH (European Society Hypertension) guidelines for validation studies. These data will then be published separately for validation purposes.

Eligibility criteria: Inclusion Criteria:

* able to give informed consent
* in Sinus rhythm
* no anatomical limitation to take blood pressure

Exclusion Criteria:

* Atrial fibrillation
* Dialysis shunt

Primary outcomes:
measure: Absolute difference between systolic blood pressure values determined with an oscillometric cuff device and an iPhone 4s (Delta mmHg)
timeFrame: 1 day
Secondary outcomes:
measure: Relative difference between oscillometric blood pressure measurement and iPhone based blood pressure measurement
timeFrame: 1 day
measure: Percent of invalid measurements
timeFrame: 1 day
measure: Comparison of primary outcome in the subgroup of patients with atherosclerosis compared to the participants without arteriosclerosis.
timeFrame: 1 day
Other outcomes:
Locations:
city: Basel
country: Switzerland
facility: Universityhospital
state: BS
Study officials:
affiliation: University Hospital, Basel, Switzerland
name: Jens Eckstein, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Dorr M, Weber S, Birkemeyer R, Leonardi L, Winterhalder C, Raichle CJ, Brasier N, Burkard T, Eckstein J. iPhone App compared with standard blood pressure measurement -The iPARR trial. Am Heart J. 2021 Mar;233:102-108. doi: 10.1016/j.ahj.2020.12.003. Epub 2020 Dec 13.
citation: Vischer AS, Socrates T, Winterhalder C, Eckstein J, Mayr M, Burkard T. How should we measure blood pressure? Implications of the fourth blood pressure measurement in office blood pressure. J Clin Hypertens (Greenwich). 2021 Jan;23(1):35-43. doi: 10.1111/jch.14130. Epub 2020 Dec 14.
citation: Vischer AS, Mayr M, Socrates T, Winterhalder C, Leonardi L, Eckstein J, Burkard T. Impact of Single-Occasion American vs. Canadian Office Blood Pressure Measurement Recommendations on Blood Pressure Classification. Am J Hypertens. 2019 Jan 15;32(2):143-145. doi: 10.1093/ajh/hpy159.
citation: Raichle CJ, Eckstein J, Lapaire O, Leonardi L, Brasier N, Vischer AS, Burkard T. Performance of a Blood Pressure Smartphone App in Pregnant Women: The iPARR Trial (iPhone App Compared With Standard RR Measurement). Hypertension. 2018 Jun;71(6):1164-1169. doi: 10.1161/HYPERTENSIONAHA.117.10647. Epub 2018 Apr 9.
citation: Burkard T, Mayr M, Winterhalder C, Leonardi L, Eckstein J, Vischer AS. Reliability of single office blood pressure measurements. Heart. 2018 Jul;104(14):1173-1179. doi: 10.1136/heartjnl-2017-312523. Epub 2018 Mar 12.