Hans van den Heuvel

4 Table 5. Accuracy of the BP telemonitoring platform alarm system. (BP, blood pressure) Alarm type n (%) After manual check Clinical impact Total BP submitted 186 BP alarms Exceeded threshold 4 (2.1%) No false positive alarms Diagnosis of chronic hypertension in 1 participant 20 mmHg raise 3 (1.7%) No false positive alarms Because of absence of preeclampsia symptoms; expectant management No BP alarms 179 (96.2%) No false negative alarms Participant experience Participants reported that the provided instructions about the use of the monitor and the elements of the app were clear and that the BP monitor was easy to use. Only 1 woman requested additional explanation on the second day of the study.. It took the participants 2-5 minutes a day (mean 3.4 minutes) to take measurements and reply to the checklist in the app or the web portal. The usability of the BP monitor is rated an average of 8.9 on a 1-10 scale (range 8-10), the app/web portal 7.6 (range 5-10) and the content of the app 8.0 (range 7-10). Two participants reported that the web portal used by Android users was not considered user-friendly, as the design of the webpage was not suitable for their screen. Not all participants (3 out of 10 iOS users) managed to connect the iHealth monitor to the iOS app with Bluetooth. After referral to the Luscii helpdesk, technical issues could be fixed. The platform was considered useful to gain more insight in BP trend (77%, 10/13), to feel involved in prenatal care (85%, 11/13) and to feel engaged in care participation (77%, 10/13) (Figure S3). The majority of participants (12/13) strongly agreed to the statement “I would use the telemonitoring platform if there would be a reason for frequent monitoring”. All participants (13/13) would recommend telemonitoring by the blood pressure monitor and the Luscii app to other patients. No differences were found in the results of users of iOS users versus Android users. Research team evaluation From the perinatal care professional point of view, all stages of the feasibility trial were discussed to evaluate the concept of the telemonitoring strategy and to improve it for further implementation. The medical professionals stated the dashboard was clear with easy reviewing of alarms, due to the connection with our hospitals’ electronic health record. In some cases of alerts, the participants were contacted by telephone. The patients appreciated this extra form of attention, information and reassurance. Additional patient instructions about when to measure and when not to measure (e.g. outside office hours or in case of subacute onset of symptoms) was found an essential aspect of the strategy and to assure patient safety in a high risk population. FEASIBILITY STUDY OF BLOOD PRESSURE TELEMONITORING IN PREGNANCY 61