- Research article
- Open Access
Implementation of simple telehealth to manage hypertension in general practice: a service evaluation
BMC Family Practice volume 16, Article number: 83 (2015)
Hypertension is common and conveys significant risk of morbidity and mortality. However, inadequate control of hypertension is common. Following a successful local use of a simple telehealth intervention (‘Florence’) for the diagnosis and management of hypertension, the Advice & Interactive Messaging (AIM) for Health simple telehealth programme was launched across England in March 2013. Four protocols were developed to diagnose and monitor blood pressure (BP). The aim of this service evaluation was to identify the extent to which predefined service outcomes, regarding ascertainment of a diagnosis of hypertension, and achievement of hypertension control, were met for the hypertension protocols.
Patients with opportunistic raised BP in general practice or diagnosed hypertension were selected by their usual primary care providers to register onto diagnostic or monitoring hypertension protocols, respectively. Florence sent patients prompts via text messaging to submit readings, educational messages and user satisfaction questions. Patient responses were stored on Florence for review by their primary care health providers. This service evaluation used data from 2963 patients from general practices across England registered onto one of four AIM hypertension protocols from inception to January 2014. Data were extracted from Florence and underwent descriptive analysis.
1166/1468 (79 %) patients were eligible to have a diagnosis of hypertension confirmed/refuted, of which 740 (63 %) had a mean BP in the hypertensive range from one week’s readings. BP control was achieved by only 5-22 % of 1495 patients signed up to one of the three monitoring protocols. Patient engagement with the monitoring protocols was initially good but reduced over time.
Although simple telehealth may be an acceptable tool for diagnosing and monitoring hypertension among responding patient users, and can have a useful role in diagnosis of hypertension (particularly if ambulatory blood pressure monitoring (ABPM) is not possible or is declined), problems were identified. Reduced patient engagement over longer periods and acceptance of suboptimal BP control among patients on monitoring protocols need to be urgently addressed. Empirical work is required to identify barriers to achieving BP control among hypertensive patients using simple telehealth and, consequently, services be developed to address these issues.
Hypertension affects 42 % of adults in England  and is a key risk factor for cardiovascular and renal disease . Despite its significant negative health consequences it is commonly inadequately controlled . Patient compliance with prescribed medication regimes is also known to be suboptimal due to factors that make adhering to treatment regimens difficult (unintentional non-adherence) and patient choice (intentional non-adherence); the latter may arise from lack of understanding and/or misconceptions about the medication and/or hypertension, may lead to an imbalance in the perceived need or risk of taking medication, and, associated with this, a paucity of information given in consultations may all contribute to intentional non-adherence [3–5]. The 2011 National Institute for Health and Care Excellence (NICE) hypertension guidelines  recognised the impact of the ‘white coat effect’ and that diagnosis of hypertension should be made from out-of-clinic measurements, particularly advocating ambulatory blood pressure monitoring (ABPM) or, as an alternative, home blood pressure monitoring (HBPM) over the course of a week . Patients in whom treatment is indicated should be managed to a target of <140/90 mm Hg if aged under 80 years  or <130/80 mm Hg in the presence of chronic kidney disease (CKD) if their urinary albumin:creatinine ratio (ACR) is ≥70 mg/mmol . Treatment is usually titrated against clinic readings but ABPM or HBPM can be used if white coat effect is suspected, or according to patient choice. If home readings are used blood pressure (BP) targets should be adjusted by -5/-5 mm Hg . Patients undertaking ongoing HBPM can have small but significant improvements in their BP control compared with those being managed using traditional care models [8–11] but this effect is not consistent across all studies .
Telehealth is being increasingly embedded within the English National Health Service (NHS) . However, the evidence to support telehealth is variable  and limited , not least because ‘telehealth’ refers to a wide range of technologies, some of which may involve complex, costly or specific brands of equipment to manage a plethora of conditions. The simple telehealth system, ‘Florence’ or ‘Flo’, utilises a patient’s mobile phone. It uses text messages to prompt patients to return clinical data via text and to send information to support self-management and education; in return, patients can submit clinical readings (e.g. self-taken blood pressure measurements) and information. Thus the Florence system accentuates previously agreed clinical management between patient and clinician and is not a medical device. Patient responses are collected onto a central server to be reviewed intermittently by their responsible clinician. Simple telehealth is therefore well placed for the diagnosis and management of hypertension as it enables clinicians to make decisions based on a number of readings, systematises haphazard use of HBPM results , mitigates against lost or forgotten readings, allows patients to send readings at their convenience and, in the case of hypertension diagnosis, potentially saves face-to-face follow-up appointments if healthcare professionals can remotely confirm and relay that the patient is normotensive. Because using simple telehealth to manage hypertension, or suspected hypertension, uses the patient’s own mobile phone, specific training is only required to instruct on the use of an automated sphygmomanometer; the costs of these and associated text messages are relatively low. Although automatic transmission of clinical data from more complex equipment would negate the problems introduced by poor dexterity or visual or cognitive impairment, the rationale underlying simple telehealth is that patients are active participants in their care. It is anticipated that the process of measuring and relaying clinical information adds to the impact of the educational messages given by the clinical team, rather than patients being passive recipients of automated care. Telemonitoring appears to be associated with a reduction in BP among hypertensive patients; the majority of patients remain compliant with this type of monitoring and patients are generally satisfied with this type of service delivery [11, 17, 18]. However, there remains a paucity of data outlining the exact role of simple telehealth among the primary care population. Results from a recent service evaluation of Florence for the management of hypertension [19, 20] were consistent with these findings and enabled access to care for those who found it difficult to attend GP surgeries due to occupational or personal commitments . Reductions in BP were observed among patients who were using the system .
This service evaluation was undertaken to identify the extent to which the predefined service outcomes were met for hypertension diagnosis and range of BP monitoring protocols used in the national Advice & Interactive Messaging (AIM) for Health simple telehealth programme.
The AIM programme was rolled out across England in March 2013 in 425 general practices across 31 Clinical Commissioning Groups (CCGs) with a choice of ten clinical applications. Using Florence, patients were supported to take responsibility for the monitoring and shared management of their BP. Four hypertension protocols were developed to assist with i) diagnosis of hypertension (AIM01), ii) controlling BP in those who were newly diagnosed or who have had poor BP control (AIM02) for two months, iii) monitoring patients with stable BP (AIM03) for three months and iv) controlling BP in those who were newly diagnosed or who have had poor BP control among patients with CKD or diabetes and/or ACR ≥70 mg/mmol (AIM10) for three months (Table 1). Individual patients were invited to use and registered onto Florence hypertension protocols by their responsible general practice clinicians; patient selection criteria were suggested in each clinical protocol that each general practice team could choose to adhere to. Each patient using a hypertension protocol required their own mobile phone (any type) or ready access to another person’s mobile phone such as a trusted family member, a sphygmomanometer (lent for one week or three months period depending on protocol, or bought) and were given a shared management plan. The management plan provided information about acceptable and concerning BP readings and agreed actions that the patient should take if BP readings fell outside of the acceptable range. Since 2004, general practices in England have been incentivised to support their registered patients to reach target levels for BP that reflect national best practice guidance. Clinical protocols developed for this project were therefore based on current NICE guidelines for hypertension , allowing for a 5/5 mmHg deduction from clinic based target levels expected for patients’ home based blood pressure readings. However, practices were required to ensure that shared management plans between clinician and patient signed up to Florence matched their own clinical practice protocols. Patients were prompted to submit BP readings at the required times defined by the protocol. Florence served to reinforce the information on their shared management plan by sending automatic responses detailing the actions patients should take if they submitted readings outside of the acceptable range. The patients’ responsible clinicians were required to periodically (e.g. weekly) check patients’ submitted BP readings on the Florence website and contact patients if necessary (e.g. by personal text or telephone call) with further instructions.
In 2013/4 the Department of Health provided financial incentives to encourage general practice teams to provide digital delivery of care (eg telehealth, telemedicine, skype). With this in mind, the AIM programme was funded by the Department of Health in order to introduce general practice to the potential of digital delivery of care for long term conditions on a wide scale. The part-time programme team included a national manager, clinical lead, technical lead, three AIM national telehealth facilitators, an administrator and an academic lead for evaluation for the first 18 months of the programme. These roles covered the promotion of the programme, development of clinical protocol content and associated technical telehealth protocols, agreeing a memorandum of understanding of what was required with each CCG, arranging introductory workshops and supporting ongoing training and rollout in each CCG, extraction and collation of data from patient texted responses to automated questions from Florence, and evaluation. Clinical and administrative input in each participating general practice team varied according to their own interests. The programme team offered each CCG an example job description for the recommended clinical telehealth facilitator; then each CCG acted independently in appointing someone to that role (average 4 hours per week) and overseeing them, with a £2000 contribution from the national programme funds. Sixteen introductory workshops were run for local clinicians and CCG leads (including CCG managers, commissioning leads, long term conditions lead, locality leads, medicines optimisations leads, GPs, practice nurses) across England between March – December 2013 and covered all available clinical protocols and ‘how to do it’. After these workshops, participating CCGs recommended a specific choice of clinical protocols to clinical users via the AIM national telehealth facilitators, their local CCG clinical telehealth facilitator or from online resources with substantive workbooks that included suggested paperwork for patient information, consent, learning, shared management plans and clinical protocols. Each practice team was responsible for their own choice of clinical protocols, patient selection and sign up, clinical management, oversight of patient texted responses and subsequent clinical management (e.g. change in medication) in line with their usual practice. The programme team gave monthly feedback to each participating CCG on their progress in engaging numbers of practices and protocol usage (type and numbers of patients signed up). The programme funded the annual licence for each participating CCG and Mediaburst Limited funded 15,000 texts, with extra texts paid for by the responsible CCG so that neither patient nor clinician paid for Florence texts.
This work evaluates a service improvement against pre-defined success criteria. This service was rolled out independently of the service evaluation. It is not a research project and therefore ethical approval was not required.
Prior to undertaking the national roll-out of the AIM programme, expected success criteria relating to the clinical BP readings for each protocol were defined by the team who developed the programme. These criteria were chosen to reflect the aims of the programme and the expected outcomes outlined in the AIM programme protocols; the criteria are summarised in Table 1. In addition to the protocol specific data an overall aim of the AIM programme was to enhance patient experience of shared management of their long term condition(s) via Florence telehealth.
Patients who registered on one of four hypertension protocols (AIM01, AIM02, AIM03, AIM10) between 1st March 2013 and 31st January 2014 were included in this part of the service evaluation; the other AIM protocols (AIM04-09) are described elsewhere . Anonymous data relating to these patients entered from registration to the 30th April 2014, inclusive, were extracted from Florence using automatic data processing. Extracted data included readings submitted to Florence by the patient. Data were excluded if the ‘patient’ was clearly labelled with a ‘demo’, ‘test’, ‘development’ or ‘training’ identity, if the patient was not on a hypertension protocol, if the patient started the protocol after 31st January 2014 or if readings were identified as being implausible (Table 2).
To calculate mean BP, readings were excluded from day zero (as readings were not required by the protocol) and day one, as per NICE guidelines . Mean BPs were not calculated if there were fewer than four separate days’ readings for AIM01 following these exclusions . For protocols AIM02, AIM03 and AIM10, mean BP was calculated for the last two weeks of protocol use. Practices were given standardised AIM protocols to use but these could be adapted for individual patients in line with clinical judgement or preferences. Therefore, there were some variations in the frequency and timing at which responses were requested.
To identify whether one of the primary aims of the AIM programme, to enhance patient experience, had been met, patients were sent up to three evaluation questions at the end of each month of use (or end of week one for AIM01). To prevent confusion and reduce the burden on patients, questions two and three were only sent on receipt of questions one and two, respectively. Evaluation questions were:
An adapted version of the national ‘family and friends’ test: ‘Please text #1 if you agree with the statement "I would recommend this service to my family and friends", or #2 if you disagree’.
If on AIM01: ‘Now please tell us if you feel confident about taking your blood pressure. Please text #1 if you do, or #2 if you don't. Thanks, Flo.’
If on AIM02, AIM03 and AIM10: ‘Now do you feel confident you understand your blood pressure better? Please text #1 if you do or #2 if you do not. Thanks, Flo.’
If on AIM01, AIM02 and AIM10: ‘Please text #1 if you agree with the statement "I prefer to send my readings to my practice via Flo, rather than go in person", or #2 if you disagree’.
If on AIM03: ‘Finally, please text #1 if you agree with the statement "I take my tablets regularly", or #2 if you disagree’.
Responses to first evaluation question, the adapted friends and family test, are described elsewhere . This part of the service evaluation focuses on the responses to the second and third evaluation questions which had a clinical focus.
This was designed as a service improvement programme for patients whose clinical team felt that they would benefit from clarification or improved control of their raised BP readings. Therefore, all patients who were deemed to be eligible for the service and wished to take part were invited to register. Thus, there were no control patients. The following data collection descriptive data analysis was undertaken using Microsoft Excel (2007).
During the evaluation period, 2963 patients from 357 practices (number of patients recruited per practice: minimum = 1, maximum = 104), registered onto an AIM hypertension protocol; nearly half of these patients registered onto AIM01 (n = 1468) (Table 3). Of these, over 50 % achieved the minimum target days of texting over the protocol duration for those registered on AIM01 (83 %) and AIM02 (56 %), however this success criterion was not met for AIM03 (15 %) or AIM10 (47 %).
Diagnosis of hypertension
The pre-defined success criterion for AIM01 was that 100 % of patients using the protocol were confirmed as having hypertension or not. This success criterion was not met as the mean BP could only be calculated for 1166/1468 (79 %) patients who registered on the protocol. However, of those for whom a diagnosis of hypertension could be confirmed/refuted, 740 (63 %) were found to have a mean BP in the hypertensive range (≥135/85 mm Hg).
Control of hypertension
Success criteria for the hypertension monitoring protocols, AIM02, AIM03 and AIM10, were that BP had become controlled by the end of protocol use in a pre-defined proportion (75-80 %) of patients (Table 1). However, the proportions outlined in the success criteria were not reached for any of the monitoring protocols (5-22 %) (Table 4).
Patient user feedback
Only patients who were sent, and then responded to, the first evaluative question were sent the second patient evaluation question. Responses to the first evaluative question, the adapted friends and family question, are described elsewhere . The majority of patients responding to the second evaluative question (82-97 %) agreed that they were more confident in taking their BP (AIM01) and understanding their BP (AIM02, AIM03, AIM10) at each time point for each protocol (see Table 5). However, these proportions represented only 9-54 % of the total number of patients ever registered on each protocol, due to non-response to the initial evaluation question, poor response to the second evaluation question (AIM03) and evaluative texts not being sent to patients. Clinical telehealth facilitator intelligence suggests that clinicians discontinued patients' protocols when patients had dropped out or the purpose of the protocol had been met (e.g. presence of hypertension confirmed or refuted; blood pressure adequately controlled); this sometimes occurred before the next monthly evaluative series of texts were sent to patients.
Only patients who responded to the second question were sent the third evaluative question. At each time point, most respondents on AIM01, AIM02 and AIM10 (93-98 %) agreed that they preferred to send their BP readings into their general practice via Florence, rather than consulting in person. Of responding patients on AIM03, at least 89 % of patients reported that they took their tablets regularly and this increased to 97 % by month three (Table 6). However, again, these proportions represented only 9-50 % of the total number of patients ever registered on each protocol, due to the reasons outlined above.
This service evaluation was undertaken to identify the extent to which predefined service outcomes were met for hypertension protocols used in the national AIM simple telehealth programme. Patient engagement with the service was good in the first month, but rapidly started to reduce over the subsequent two months of protocol use. Sufficient readings were obtained for only four out of five patients on the diagnosis protocol (AIM01). Although 100 % may have been an over optimistic target, the proportion in whom a diagnosis of hypertension could be confirmed or refuted was suboptimal compared with ABPM. However, it is well known to practising clinicians and in the literature that ABPM is not always tolerated by patients , nor may sufficient equipment be affordable for some general practices. The results from this service evaluation do indicate that, provided that patients are adequately counselled about the number of BP readings needed, simple telehealth may represent an alternative strategy for diagnosis of hypertension in those who decline ABPM.
Pre-defined success criteria relating to the control of hypertension were not met and fell short by a significant amount. The extent of the failure to achieve control in the pre-defined proportions of patients by the end of the patients’ use of monitoring protocols was disappointing, particularly when compared to control among 51 % of patients being observed in a randomised controlled trial of 110 patients with diabetes to a lower treatment target (<130/80 mmHg) . However, it may not be so surprising when one considers that other empirical trials have shown reductions in BP in excess of those receiving traditional models of care but not always to below the targets used in this evaluation . Indeed, optimal control of hypertension in general is only reported as occurring in 60-70 % cases . Potential reasons for suboptimal control are plentiful  and may include; insufficient time within the protocol to establish full antihypertensive titration, as empirical studies often use longer follow-up periods [18, 24, 25] use of data only from patients who had completed the protocols, thus not assessing patients who have continued using the protocols beyond the defined protocol period, patients recommended to register with Florence may be those who were already difficult to get into range , patients becoming bored with the intervention, messaging being ineffective at reminding patients to take regular medication, or patients becoming frustrated with continuing text messages and prompts for actions. Other reasons for suboptimal control may include clinicians being inadequately proactive when managing hypertension (‘therapeutic inertia’) , or fear (of the patient or GP) of increasing medication . Reasons for suboptimal control need to be identified and rectified with some urgency to ensure that ongoing use of simple telehealth in this way is optimised.
Feedback from patient users is limited by the low absolute proportion of patients responding. This was explained by the lack of engagement over longer periods, in general, poor response to the initial evaluation question and individualised alterations to protocols made by the patients’ clinical teams, such that evaluation questions were not sent. However, results from the responders to the question illustrated that, for those patients who remained actively involved with the protocols, this alternative method of service delivery was valued.
This service evaluation has identified issues with engagement with protocols and timely control of hypertension using this service. However, it has shown that this type of service delivery may be valued by, and provide an alternative means of management of, certain patients. To this end, simple telehealth could be viewed as an alternative service delivery strategy for suitable patients that should join in-practice measurements, HBPM and ABMP in a larger toolkit for managing hypertension and that the method used should be tailored to individual patients’ needs, preferences and ability. However, further empirical work must be undertaken to identify the reasons for suboptimal engagement of patients and control of BP in order to maximise its effectiveness into the future.
Strengths and limitations
The strength of this evaluation is that it has examined real life use among a national primary care population without the influence of programme-linked incentives or ‘cherry picked’ patients, as no inclusion/exclusion criteria were applied to the patients who clinicians signed up to the Florence system. Patients who were using Florence were using their own, or their carer’s, mobile phones; thus reducing the chance of patients being included who could not use these types of devices. The size of the sample was large compared with empirical studies examining similar interventions  and results are likely to be generalisable across the primary care population in England. However, the unscreened nature of the patients included in this service evaluation is also likely to be associated with the lower levels of adherence with these protocols than is seen in empirical research studies [18, 24, 27]. By nature of this being a service evaluation, only information that was collected routinely as part of normal service delivery could be examined (that is, patients’ texted in BP readings and other responses to automated questions from Florence), patients’ medical records were not reviewed and patients and clinical users were not interviewed to gain greater clarity on the issues identified. Thus reasons for lack of ongoing engagement with Florence could also not be confidently ascertained. This is problematic as it may indicate anything from a negative attitude about the service through to cessation of use as the patient feels adequately equipped to follow BP management plans without the prompts from Florence.
The health benefits of the monitoring protocols may have been underestimated in this report as reductions in BP can result in the lowering of cardiovascular risk even if BP is not reduced to target . This sort of positive health effect could not be captured using the dichotomous (controlled or uncontrolled) outcome used in this evaluation.
Implications for future service delivery in general practice
Results pertaining to patient activity and attainment of minimum texting days for each protocol, suggest that protocols delivering shorter bursts of intervention (e.g. few weeks rather than few months) may be preferable when using this type of service. If longer interventions are desirable or necessary, methods to optimise engagement need to be sought, these may include: reduced frequency of contacts to redress the balance between prompts and burden or implementation of strategies to boost motivation. Although HBPM has been associated with reduced therapeutic inertia , this phenomenon may have been an issue contributing to the poor control observed in this service evaluation. Therefore, for similar interventions to be successful in the future, it is essential to identify effective strategies to overcome therapeutic inertia , for example, the use of prompts for clinical users to remind them of the lower target used for home readings and/or to highlight patients who have remained above target for a specified period. Patient education is integral to AIM and could be developed further to enhance patients’ understanding of active management, which in turn may improve compliance with prescribed medication regimes , and to support patients to prompt medication titration if their BP remains uncontrolled. Indeed, giving patients responsibility to titrate medications themselves is a solution that may sidestep the issue of therapeutic inertia and may thus achieve better BP control than usual care . Practice teams could be incentivised to sign-up patients to remote delivery and monitor input – to cover costs of learning and participation in an innovation; as was in place whilst this programme was ongoing as a national remote direct enhanced service .
Implications for future empirical work
For those patients who supplied enough readings for a clinical assessment of BP control to be made, empirical work is required to establish reasons why their elevated BPs were not actively managed and controlled by their responsible clinician. Patient data and accompanying medical notes could be interrogated and/or users could be interviewed to establish the pattern of BP over time, to quantify the likely extent of therapeutic inertia and associated barriers to actively managing BP, to establish clinicians’ understanding of the targets (and adjustments needed for HBPM readings) and to identify patient factors that may influence participation, activity and satisfaction with the service, such as ethnicity, age, gender, education and comorbidities which were also not available in this service evaluation . The latter analysis may help to establish a ‘type’ of patient whom appears most suited to undertaking these longer protocols; for example, patients who registered with AIM10 may be older and/or more unwell/frail than those undertaking protocols AIM01 and AIM02. Reasons for disengagement with protocols could be evaluated through patient and clinical user focus groups and follow-up of patients who leave the protocol without the desired clinical outcome being met. The necessity-concerns framework may be a good foundation for this type of work . Finally, healthcare usage data could be examined over time to establish whether simple telehealth helps to reduce practice nurse or GP contacts. However, the timescale for such evaluation would need to be adequately lengthy to investigate beyond the time it takes for a patient to get set up on the system and be a confident, independent user and for practices to develop systems to integrate simple telehealth efficiently into their routine work.
This service evaluation indicates that simple telehealth can be an acceptable tool among patients for diagnosing and monitoring hypertension in a primary care population. It therefore has the potential to have a substantive role in diagnosis of hypertension, particularly if ABPM is not possible or is declined. However, pre-defined success criteria regarding BP control were not met indicating an urgent need to optimise patient engagement with protocols and/or clinician response to abnormal readings. Empirical work is required to identify barriers to achieving BP control among hypertensive patients using simple telehealth and, consequently, services, support and workforce training should be developed to address these issues.
ambulatory blood pressure monitoring
advice and interactive messaging
Clinical Commissioning Group
chronic kidney disease
diastolic blood pressure
home blood pressure monitoring
National Health Service
National Institute for Health and Care Excellence
systolic blood pressure.
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The Department of Health funded the national rollout of the Florence simple telehealth programme described including these four hypertension protocols and six other reminder and smoking cessation protocols. All authors were funded for their time spent working on the project, evaluating the project and writing associated publications from these funds. The Department of Health was not involved in the project design, collection, analysis or interpretation of the data, or in the writing of the manuscript and in the decision to submit the manuscript for publication. Mediaburst Limited, Stoke-on-Trent Clinical Commissioning Group’s licensee funded the initial batch of text messages for each participating CCG.
The Department of Health funded Stoke-on-Trent Primary Care Trust/then CCG to organise and lead the national rollout of Florence telehealth to 31 CCGs. Stoke-on-Trent CCG owns the intellectual property (IP) of Simple Telehealth including the trademarks Florence and Flo. The rollout project part funded a licence for Florence for each participating CCG from Stoke-on-Trent CCG’s licensee. Stoke-on-Trent CCG receives royalties from its licensee; Phil O’Connell, the inventor of Simple Telehealth and Florence, receives royalties from Stoke-on-Trent CCG related to the licensing of the background IP.
RC, TC and PO’C conceived and designed the programme. EC designed the service evaluation and expected success criteria in collaboration with RC, TC and PO’C. PO’C developed the data extraction protocols which were checked by EC. EC analysed the data with contribution from PO’C and TC. EC and RC conceived the paper. EC wrote the first draft of the paper. All authors contributed to the writing, review and revisions of the paper and all approved the final version before submission.
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Cottrell, E., Cox, T., O’Connell, P. et al. Implementation of simple telehealth to manage hypertension in general practice: a service evaluation. BMC Fam Pract 16, 83 (2015). https://doi.org/10.1186/s12875-015-0301-2
- primary health care