SMS-facilitated home blood pressure monitoring: A qualitative analysis of resultant health behavior change

ObjectiveHypertension is largely asymptomatic and, as a result, patients often fail to sufficiently engage in medication adherence and other health behaviors to control their blood pressure (BP). This study explores the mechanisms by which MyBP, an automated SMS-facilitated home blood pressure monitoring (HBPM) program, helps facilitate healthy behavior changes.MethodsA thematic analysis of transcribed audio-recordings from semi-structured post-intervention interviews (n = 40) was conducted.ResultsThree primary themes were identified as contributing most to patients’ decision to initiate a behavior change: 1) increased hypertension literacy attributed to educational videos presented at enrollment, 2) increased day-to-day salience of blood pressure levels as a result of consistent HBPM, and 3) use of BP readings as feedback, with high readings triggering motivations to make behavior changes. These themes and most accompanying sub-themes correspond to constructs in the Health Belief Model and Social Cognitive Theory.ConclusionPatient-centered HBPM interventions such asMyBP appear to promote improvements in hypertension self-management via several mechanisms consistent with recognized models of behavior change.Practice implicationsSMS-supported HBPM, paired with video-based education, may provide a simple and scalable way of encouraging health behavior adherence in hypertensive patients.     

Patients' experiences of self-monitoring blood pressure and self-titration of medication: the TASMINH2 trial qualitative study

Background

Self-management of hypertension, comprising self-monitoring of blood pressure with self-titration of medication, improves blood pressure control, but little is known regarding the views of patients undertaking it.

Aim

To explore patients’ views of self-monitoring blood pressure and self-titration of antihypertensive medication.

Design and setting

Qualitative study embedded within the randomised controlled trial TASMINH2 (Telemonitoirng and Self Management in the Control of Hypertension) trial of patient self-management of hypertension from 24 general practices in the West Midlands.

Method

Taped and transcribed semi-structured interviews with 23 intervention patients were used. Six family members were also interviewed. Analysis was by a constant comparative method.

Results

Patients were confident about self-monitoring and many felt their multiple home readings were more valid than single office readings taken by their GP. Although many patients self-titrated medication when required, others lacked the confidence to increase medication without reconsulting with their GP. Patients were more comfortable with titrating medication if their blood pressure readings were substantially above target, but were reluctant to implement such a change if readings were borderline. Many planned to continue self-monitoring after the study finished and report home readings to their GP, but few wished to continue with a self-management plan.

Conclusion

Participants valued the additional information and many felt confident in both self-monitoring blood pressure and self-titrating medication. The reluctance to change medication for borderline readings suggests behaviour similar to the clinical inertia seen for physicians in analogous circumstances. Additional support for those lacking in confidence to implement prearranged medication changes may allow more patients to undertake self-management.     

Variability of office, 24-hour ambulatory, and self-monitored blood pressure measurements

Background

The diagnosis of hypertension is difficult when faced with several different blood pressure measurements in an individual. Using the average of several office measurements is recommended, although considerable uncertainty remains. Twenty-four-hour ambulatory monitoring is often considered the gold standard, but self-monitoring of blood pressure has been proposed as a superior method.

Aim

Determination of within-individual variability of blood pressure measured in the office, by ambulatory monitoring, and by a week of self-monitoring.

Design of study

Retrospective analysis of a clinical trial of 163 subjects.

Method

Within-patient variability of office and ambulatory blood pressure was determined from measurements at 0 and 6 weeks. Subjects had performed self-monitoring of blood pressure twice each morning and evening, for at least 6 weeks; variability was determined from the means of week 1 and week 6.

Results

The within-individual coefficients of variation (CVs) for systolic blood pressure were: office, 8.6%; ambulatory, 5.5%; self, 4.2%. Equivalent values for diastolic blood pressure were 8.6%, 4.9%, and 3.9%. CVs tended to be lower with longer self-monitoring duration, and higher with longer intervals between self-monitoring.

Conclusion

Office blood pressure is impractical for precise assessment, as 10–13 measurements are required to give the accuracy required for rational titration of antihypertensive drugs. Twenty-four-hour ambulatory monitoring is better than a single office measurement, but considerable uncertainty remains around the estimate. A week of self-monitoring appears to be the most accurate method of measuring blood pressure, but remains imperfect. Further research may identify superior self-monitoring schedules. Given the inherent accuracy in blood pressure measurement, the importance of considering overall cardiovascular risk is emphasised.     

Reference data for ambulatory blood pressure monitoring: What results are equivalent to the established limits of office blood pressure?

Summary In 1039 subjects ambulatory blood pressure monitoring was performed to define threshold values, which are equivalent to the established limits of the office blood pressure.Mean values and proportions of elevated single readings were correlated to office blood pressure by regression analyses. To avoid impact of varying sleeping periods on 24 h blood pressure, only daytime readings were considered.Correlations between average daytime blood pressure and office blood pressure were linear: Mean daytime values of 135 mmHg (systolic) and of 84 mmHg (diastolic) were equivalent to the casual blood pressure limits of 140 mmHg and 90 mmHg.Correlations between percentages of elevated single readings and office blood pressure were nonlinear: Proportions of 25% systolic readings > 140 mmHg and of 17% diastolic readings > 90 mmHg were equivalent to casual blood pressure limits of 140 mmHg and 90 mmHg.On the basis of the regression equations, any result of ambulatory blood pressure recording during daytime can now be evaluated in terms of the established standards of office blood pressure.     

Improving management and effectiveness of home blood pressure monitoring: a qualitative UK primary care study

Background

Self-monitoring blood pressure (SMBP) is becoming an increasingly prevalent practice in UK primary care, yet there remains little conceptual understanding of why patients with hypertension engage in self-monitoring.

Aim

To identify psychological factors or processes prompting the decision to self-monitor blood pressure.

Design and setting

A qualitative study of patients previously participating in a survey study about SMBP from four general practices in the West Midlands.

Method

Taped and transcribed in-depth interviews with 16 patients (6 currently monitoring, 2 used to self-monitor, and 8 had never self-monitored). Thematic analysis was undertaken.

Results

Three main themes emerged: ‘self’ and ‘living with hypertension’ described the emotional element of living with an asymptomatic condition; ‘self-monitoring behaviour and medication’ described overall views about self-monitoring, current practice, reasons for monitoring, and the impact on medication adherence; and ‘the GP–patient transaction’ described the power relations affecting decisions to self-monitor. Self-monitoring was performed by some as a protective tool against the fears of a silent but serious condition, whereas others self-monitor simply out of curiosity. People who self-monitored tended not to discuss this with their nurse or GP, partly due to perceiving minimal or no interest from their clinician about home monitoring, and partly due to fear of being prescribed additional medication.

Conclusion

The decision to self-monitor appeared often to be an individual choice with no schedule or systems to integrate it with other medical care. Better recognition by clinicians that patients are self-monitoring, perhaps utilising the results in shared decision-making, might help integrate it into daily practice.     

Blood pressure measurements taken by patients are similar to home and ambulatory blood pressure measurements

OBJECTIVE: To compare blood pressure measurements taken at home by physicians, nurses, and patients with office blood pressure measurement , ambulatory blood pressure monitoring and home blood pressure measurement. METHODS: A total of 44 patients seen by a home care program were studied. Protocol 1 a) blood pressure was measured by the patient, a physician and a nurse during a regular home visit (Home1); b) home blood pressure measurement was measured for 4 days (HBPM1); c) office blood pressure measurement was measured by a physician, a nurse, and the patient; and by 24-hour ambulatory blood pressure monitoring. Protocol 2 blood pressure was measured by the patient, a physician, and a nurse during a special home visit in the presence of a physician and a nurse only (Home2); and b) home blood pressure measurement was taken for the second time (HBPM2). Echocardiography, guided by a two-dimensional echocardiograph, was performed. RESULTS: Protocol 1: a) office blood pressure measurement and Home1 were significantly higher than ambulatory blood pressure monitoring, except for systolic and diastolic office blood pressure measurement taken by the patient or a family member, systolic blood pressure taken by a nurse, and diastolic blood pressure taken by a physician. b) ambulatory blood pressure monitoring and HBPM1 were similar. Protocol 2: a) HBPM2 and Home2 were similar. b) Home2 was significantly lower than Home1, except for diastolic blood pressure taken by a nurse or the patient. There were significant relationships between: a) diastolic blood pressure measured by the patient and the thickness of the interventricular septum, posterior wall, and left ventricular mass; and b) ambulatory and HBPM2 diastolic and systolic blood pressure taken by a physician (home2) and left ventricular mass. Therefore, the data indicate that home blood pressure measurement and ambulatory blood pressure monitoring had good prognostic values relative to "office measurement." CONCLUSION: This study showed that the measurement most similar to home blood pressure measurement and ambulatory blood pressure monitoring was blood pressure measured by the patient, and that home blood pressure measurement and ambulatory blood pressure monitoring had good prognostic value relative to "office measurements".     

Patients' perceptions of GP non-verbal communication: a qualitative study

Background

During doctor–patient interactions, many messages are transmitted without words, through non-verbal communication.

Aim

To elucidate the types of non-verbal behaviours perceived by patients interacting with family GPs and to determine which cues are perceived most frequently.

Design of study

In-depth interviews with patients of family GPs.

Setting

Nine family practices in different regions of Poland.

Method

At each practice site, interviews were performed with four patients who were scheduled consecutively to see their family doctor.

Results

Twenty-four of 36 studied patients spontaneously perceived non-verbal behaviours of the family GP during patient–doctor encounters. They reported a total of 48 non-verbal cues. The most frequent features were tone of voice, eye contact, and facial expressions. Less frequent were examination room characteristics, touch, interpersonal distance, GP clothing, gestures, and posture.

Conclusion

Non-verbal communication is an important factor by which patients spontaneously describe and evaluate their interactions with a GP. Family GPs should be trained to better understand and monitor their own non-verbal behaviours towards patients.     

Girculation model for monitoring arterial systolic blood pressure

The theoretical basis of a new technique for monitoring systolic blood pressure is explained. This method permits continuous beat-by-beat monitoring of systolic pressure. The circulatory system is considered as a simple elastic reservoir emptying through a resistance. If certain assumptions and conditions hold, the time rate of blood-volume change in a peripheral vascular region, during diastole or systole, can be related to the arterial systolic pressure. A critical element of the technique is the maintenance of the measured peripheral vascular region at near maximal vasodilatation. If the peripheral vascular bed is well dilated, and the subject is resting or doing light exercise, the technique should permit following of blood-pressure changes with a good approximation after calibration against a standard method of measuring blood pressure (sphygmomanometer).     

Lung cancer patients' perceptions of access to financial benefits: a qualitative study.

BACKGROUND: Financial worries may add to the stress experienced by patients and their families, but they are often not discussed with health professionals. People with lung cancer usually have to give up work, and many are terminally ill. AIM: To explore the financial concerns, perceptions and experiences of claiming benefits of people with lung cancer. DESIGN OF STUDY: Qualitative study using narrative interviews. SETTING: United Kingdom. METHOD: Interviews with a maximum variation sample of 45 people with lung cancer, recruited through general practitioners, consultants, nurses and support groups. RESULTS: Some people did not know that they could claim financial benefits, others found claim forms complicated, or were unaware that they had no legal right for important allowances to be backdated. Some people had to 'struggle' to obtain much needed benefits to which they were entitled. Patients below retirement age said that they would prefer to be working, and many were shocked by how hard it was to obtain the information needed to make claims. There was some evidence that even those who are seriously ill, and life-time tax payers, feel stigma in claiming financial help. Nurses, doctors and other patients sometimes offered valuable guidance, but many patients did not receive timely advice. The special social security rules (and DS1500 report form), which might have allowed them to claim benefits more rapidly than usual and at a higher rate, were not always understood. CONCLUSION: Many reasons were found as to why people with lung cancer have difficulty getting the benefits that they are entitled to. Hospital and primary care staff who handle the issue sensitively and help set claims in motion provide a valuable service that should be replicated throughout the National Health Service.     

动态血压监测系统血压测量模块的研制

本文是动态血压监测系统研究课题的系列论文之一，介绍血压测量模块的设计，通过对传统的示波法测量技术的改进，大大减小了测量系统的功耗和体积，解决了动态血压监测的关键技术，临床实验表明，该血压测量系统具有功耗低，体积小，测量时间短，个体适应范围大等优点。     

Understanding the potential role of mobile phone-based monitoring on asthma self-management: qualitative study

BACKGROUND: National and international healthcare policy increasingly seeks technological solutions to the challenge of providing care for people with long-term conditions. Novel technologies, however, have the potential to change the dynamics of disease monitoring and self-management. We aimed to explore the opinions and concerns of people with asthma and primary care clinicians on the potential role of mobile phone monitoring technology (transmitting symptoms and peak flows, with immediate feedback of control and reminder of appropriate actions) in supporting asthma self-management. METHODS: This qualitative study recruited 48 participants (34 adults and teenagers with asthma, 14 asthma nurses and doctors) from primary care in Lothian (Central Scotland) and Kent (South East England). Thirty-nine participated in six focus groups, which included a demonstration of the technology; nine gave in-depth interviews before and after a 4-week trial of the technology. RESULTS: Participants considered that mobile phone-based monitoring systems can facilitate guided self-management although, paradoxically, may engender dependence on professional/technological support. In the early phases, as patients are learning to accept, understand and control their asthma, this support was seen as providing much-needed confidence. During the maintenance phase, when self-management predominates, patient and professionals were concerned that increased dependence may be unhelpful, although they appreciated that maintaining an on-going record could facilitate consultations. CONCLUSION: Mobile phone-based monitoring systems have the potential to support guided self-management by aiding transition from clinician-supported early phases to effective self-management during the maintenance phase. Continuing development, adoption and formal evaluation of these systems should take account of the insights provided by our data.     

Laboratory-based blood pressure recovery is a predictor of ambulatory blood pressure

The recovery phase of the stress response is an individual difference characteristic that may predict cardiovascular risk. The purpose of this study was to examine whether laboratory-based blood pressure (BP) recovery predicts ambulatory BP (ABP). One hundred and eighty-two participants underwent a standard laboratory stress protocol, involving a 20-min baseline rest period, and four stressors presented in a counterbalanced order, each followed by a 10-min recovery period. Participants also wore an ABP monitor for 24h during a typical workday. Hierarchical regression analyses showed that BP recovery accounted for significant additional variance for daytime SBP (p<0.001), nighttime SBP (p<0.001), daytime DBP (p<0.001), and nighttime DBP (p<0.001), after controlling for baseline and reactivity BP. Results suggest that persistence of the BP response following stress may be a more salient characteristic of the stress response in understanding its potential impact on longer term cardiovascular regulation.     

Ambulatory instrument for monitoring indirect beat-to-beat blood pressure in superficial temporal artery using volume-compensation method

A portable instrument, based on a volume-compensation technique, is designed for ambulatory monitoring of indirect beat-to-beat blood pressure (BP) in the superficial temporal artery. The instrument consists of a small disc-type cuff and a portable unit carried by the subject. Several components are integrated in the cuff for applying counter-pressure to the artery, i.e. a reflectance-type photo-plethysmographic sensor for arterial volume detection, a pressure sensor for cuff pressure P_c measurement and a nozzle flapper-type electro-pneumatic convertor for controlling P_c. The portable unit includes volume servo control circuitry and a microprocessor-based signal-processing and recording unit. This automatically performs all the necessary measurement procedures and stores into a memory IC element the processed systolic, mean and diastolic blood pressure data, together with pulse intervals on a beat-to-beat basis from the servo-controlled P_c (indirectly measured BP waveform). With this instrument, momentary changes in BP during ambulatory situations such as bicycle ergometer exercise and daily activities including motorway driving are successfully recorded. From the results of simultaneous measurement of the subject's posture changes, the effect of posture change on blood pressure, e.g. baroreceptor-cardiac reflex, is also clearly demonstrated.     

Prevalence of pre-high blood pressure and high blood pressure among non-overweight children and adolescents using international blood pressure references in developed regions in China

Background: There is a lack of data on the prevalence of pre-high blood pressure (PreHBP) and high blood pressure (HBP), based on recent international blood pressure references, in non-overweight children and adolescents.

Aim: To describe the prevalence of PreHBP and HBP in non-overweight children and adolescents in developed regions of China.

Subjects and methods: In total, 588?097 non-overweight children and adolescents aged 6–17?years from the National Surveys on Chinese Students’ Constitution and Health in 2015 were included.

Results: The prevalence of PreHBP was 13.41% and subjects in urban areas had a higher prevalence of PreHBP (14.14%) than those in rural areas (12.92%). Subjects in regions with a high (13.56%) or moderate (13.61%) socioeconomic status showed a higher prevalence of PreHBP than those in regions with a relatively low socioeconomic status (12.76%). A similar pattern was found for the prevalence of HBP, and the prevalence of HBP was 18.25% for all participants, 20.55% for subjects in urban areas, 16.71% in rural areas, 18.76% in high socioeconomic areas, 18.62% in moderate socioeconomic areas and 16.70% in relatively low socioeconomic areas.

Conclusion: A large proportion of non-overweight children and adolescents had elevated blood pressure and there were urban–rural and socioeconomic disparities in the prevalence of elevated blood pressure.     

Long-term ambulatory monitoring of indirect arterial blood pressure using a volume-oscillometric method

A new portable instrument equipped with a microprocessor was designed for the long-term ambulatory monitoring of indirect arterial pressure in the human finger at desired intervals using a volume-oscillometric technique. All the necessary procedures such as (1) programmed control of cuff pressure, (2) detection of the systolic end-point and the point of maximum amplitude of arterial volume pulsations, (3) reading of the cuff pressures corresponding to these two points, (4) its processing and (5) recording of the systolic and mean pressure together with heart rate on a digital memory integrated circuit were performed automatically. After the monitoring, the data were reproduced and analysed by a conventional personal computer. Simultaneous comparison of the data with direct measurement, operation and evaluation of this instrument, and ambulatory monitoring were carried out. With this instrument noninvasive and accurate monitoring of arterial pressure could be made in unrestricted subjects during daily activities.     

Continuous non-invasive blood pressure monitoring using concentrically interlocking control loops

A new method and apparatus for non-disruptive blood pressure (BP) recording in the finger based on the vascular unloading technique is introduced. The instrument, in contrast to intermittent set point readjustments of the conventional vascular unloading technique, delivers BP without interruptions, thus refining the Penáz' principle. The method is based on concentrically interlocking control loops for correct long-term tracing of finger BP, including automatic set point adaptation, light control and separate inlet and outlet valves for electro-pneumatic control. Examples of long-term BP recordings at rest and during autonomic function tests illustrate the potential of the new instrument.     

Elevated nocturnal blood pressure assessed by ambulatory automatic monitoring during a stay at high altitude

The aim of this study was to explore, in healthy children, the arterial blood pressure response to a 3-week stay at high altitude (4200 m). An auscultatory automatic ambulatory pressuremeter was used to avoid undue environmental influence on the measurement. The blood pressure was monitored three times in a group of ten boys, aged 10.5 (CI 0.9 years): at sea level (control values), at an altitude of 2100 m after at least 24 h of acclimatization and after at least 24 h at 4200 m altitude. Each period of monitoring extended over 24 h with 10-min intervals between successive measurements. Arterial blood pressure was evaluated separately for the night and day periods. Nocturnal recordings revealed an increase with altitude in systolic as well as in the diastolic blood pressure. Because of the technique used to gather data, this is thought to have represented an independent effect of altitude without interference from the medical environment or diurnal activity.     

The effect of melatonin on circadian blood pressure in patients with type 2 diabetes and essential hypertension

Introduction

The aim of this study was to evaluate the effect of melatonin on blood pressure in patients with essential hypertension receiving medical treatment and with type 2 diabetes in good metabolic control.

Material and methods

The study lasted 8 weeks. Patients were equipped with a 24-hour ambulatory blood pressure monitor and took melatonin (3 mg a day in the evening) for 4 weeks. The patients were divided into four groups: group 1 (n = 32) including dippers, group 2 (n = 34) non-dippers treated with melatonin; and two control groups: group 3 (n = 28) including dippers and group 4 (n = 30) non-dippers treated without melatonin. After 4 weeks patients took melatonin for the next 4 weeks (5 mg a day). In each visit were analyzed: systolic, diastolic and mean blood pressure in both day and night time.

Results

We observed that 29.5% non-dippers (n = 10) treated with melatonin in a dose of 3 mg/day achieved features of dippers compared to control group (p < 0.05). Five mg of melatonin per day restored normal diurnal blood pressure rhythm in 32.4% non-dippers (n = 11, p < 0.05). In non-dippers treated with melatonin significant decreases of diastolic, systolic and mean night blood pressure values (p < 0.05) were observed.

Conclusions

More than 30% of non-dippers with type 2 diabetes treated with melatonin were restored to the normal circadian rhythm of blood pressure. The effect of melatonin in both doses (3 mg and 5 mg) was significant for non-dippers only and included nocturnal systolic, diastolic and mean arterial pressure.     

Effect of repeated measurements of blood pressure on blood pressure in essential hypertension: Role of anxiety

Over the past years, we repeatedly observed that of the hypertensive population entered into our behavioral treatment programs, more than half were actually false hypertensives. With repeated measurements of blood pressure (BP), only one-third remained hypertensive, while two-thirds showed a significant decrease in BP. The purpose of this study was to determine which factors correlate with the decrease in BP and could be useful in distinguishing the true and the false hypertensives. Of the 24 patients in this study, 15 decreased their mean arterial pressure by at least 5 mm Hg during a 6-week period of home and clinic BP measurement, while 9 did not. The 9 patients with BPs that did not change had lower State Anxiety, Trait Anxiety scores, lower diastolic BP, and lower heart rates compared to the group whose BPs decreased. These results suggest that under certain conditions a relationship exists between anxiety and elevated blood pressure. In a segment of the hypertensive population, anxious patients may be placed on inappropriate anti-hypertensive medication if a BP measurement period is not conducted before intervention.