Blood Pressure Measurement: Should Technique Define Targets?

Summary

Hypertension is the single most important risk factor for cardiovascular disease and death, yet blood pressure itself is highly influenced by technique and device. Hence, the target blood pressure could vary materially based on BP technique and device used. In the present study, the investigators will compare 4 different methods of measuring blood pressure in the office (casual, resting average of 3 readings with nurse present or absent for resting period, and average of 5 readings) as well as a 24 hour ambulatory measurement. The results of this study will help and enable practicing family physicians and specialists in Canada to target BP for their patients based on algorithm and method of assessment of BP they use in their offices.

Conditions

• Hypertension

Interventions

DIAGNOSTIC_TEST

BpTRU First, Unattended Omron Second

Visit 1: The participants will have the oscillometric device, BpTRU applied to their arm with the higher blood pressure. This will allow assessment with the commonest used Canadian device, which provides an average after 5 unattended readings. This assessment will be followed by the participant wearing a 24 hour ambulatory blood pressure monitor (ABPM) for 24 hours. Visit 2: Upon returning the 24 hour ABPM device, the patient will have their blood pressure measured with an unattended Omron second. The Omron HEM 907XL will be applied to the same arm that the BpTRU was applied to in the first visit. There will be 5 minutes of quiet rest (participant alone) and three readings subsequently while the patient is still alone with the average blood pressure measurement being noted.

DIAGNOSTIC_TEST

Unattended Omron First, BpTRU Second

Visit 1: The participants will have the Omron HEM 907XL will be applied to their arm with the higher blood pressure. There will be 5 minutes of quiet rest (participant alone) and three readings subsequently while the patient is still alone with the average blood pressure measurement being noted.This assessment will be followed by the participant wearing a 24 hour ambulatory blood pressure monitor (ABPM) for 24 hours. Visit 2: Upon returning the 24 hour ABPM device, the participants will have the oscillometric device, BpTRU applied to the same arm that the Omron HEM 907 XL was applied to in the first visit. This will allow assessment with the commonest used Canadian device, which provides an average after 5 unattended blood pressure readings.

DIAGNOSTIC_TEST

Partially Attended Omron First, Unattended Omron Second

Visit 1: The participant will have the Omron HEM 907 XL applied to the arm with the higher blood pressure. There will be five minutes of quiet rest (patient alone) and three reading subsequently, but with the nurse entering the room (i.e., partially attended), with the average being noted. This assessment will be followed by the participant wearing a 24 hour ambulatory blood pressure monitor (ABPM) for 24 hours. Visit 2: Upon returning 24 hour ABPM device, the participant will have the Omron HEM 907 XL applied to same arm that was used during the first visit. There will be five minutes of quiet rest (patient alone) and three readings subsequently (patient still alone) with the average blood pressure measurement being noted.

Sponsors & Collaborators

• The Physicians' Services Incorporated Foundation

  collaborator OTHER

• Ottawa Hospital Research Institute

  lead OTHER

Principal Investigators

• Marcel Ruzicka, MD, PHD · Ottawa Hospital Research Institute

Study Design

Allocation

RANDOMIZED

Purpose

DIAGNOSTIC

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2017-10-12

Primary Completion

2019-06-30

Completion

2019-08-31

Countries

• Canada

Study Locations