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Article
Publication date: 3 February 2021

Jian Tian, Jiangan Xie, Zhonghua He, Qianfeng Ma and Xiuxin Wang

Wrist-cuff oscillometric blood pressure monitors are very popular in the portable medical device market. However, its accuracy has always been controversial. In addition…

Abstract

Purpose

Wrist-cuff oscillometric blood pressure monitors are very popular in the portable medical device market. However, its accuracy has always been controversial. In addition to the oscillatory pressure pulse wave, the finger photoplethysmography (PPG) can provide information on blood pressure changes. A blood pressure measurement system integrating the information of pressure pulse wave and the finger PPG may improve measurement accuracy. Additionally, a neural network can synthesize the information of different types of signals and approximate the complex nonlinear relationship between inputs and outputs. The purpose of this study is to verify the hypothesis that a wrist-cuff device using a neural network for blood pressure estimation from both the oscillatory pressure pulse wave and PPG signal may improve the accuracy.

Design/methodology/approach

A PPG sensor was integrated into a wrist blood pressure monitor, so the finger PPG and the oscillatory pressure wave could be detected at the same time during the measurement. After the peak detection, curves were fitted to the data of pressure pulse amplitude and PPG pulse amplitude versus time. A genetic algorithm-back propagation neural network was constructed. Parameters of the curves were inputted into the neural network, the outputs of which were the measurement values of blood pressure. Blood pressure measurements of 145 subjects were obtained using a mercury sphygmomanometer, the developed device with the neural network algorithm and an Omron HEM-6111 blood pressure monitor for comparison.

Findings

For the systolic blood pressure (SBP), the difference between the proposed device and the mercury sphygmomanometer is 0.0062 ± 2.55 mmHg (mean ± SD) and the difference between the Omron device and the mercury sphygmomanometer is 1.13 ± 9.48 mmHg. The difference in diastolic blood pressure between the mercury sphygmomanometer and the proposed device was 0.28 ± 2.99 mmHg. The difference in diastolic blood pressure between the mercury sphygmomanometer and Omron HEM-6111 was −3.37 ± 7.53 mmHg.

Originality/value

Although the difference in the SBP error between the proposed device and Omron HEM-6111 was not remarkable, there was a significant difference between the proposed device and Omron HEM-6111 in the diastolic blood pressure error. The developed device showed an improved performance. This study was an attempt to enhance the accuracy of wrist-cuff oscillometric blood pressure monitors by using the finger PPG and the neural network. The hardware framework constructed in this study can improve the conventional wrist oscillometric sphygmomanometer and may be used for continuous measurement of blood pressure.

Details

Sensor Review, vol. 41 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 27 September 2011

Chi‐Fung Lu, Alyssa B. Schultz, Mary Jenny and Dee W. Edington

The purpose of this paper is to evaluate a mail‐based educational intervention to improve knowledge of blood pressure and cholesterol values among members of a large…

Abstract

Purpose

The purpose of this paper is to evaluate a mail‐based educational intervention to improve knowledge of blood pressure and cholesterol values among members of a large insurance population.

Design/methodology/approach

As part of the 2004 health risk appraisal (HRA) follow‐up program, 48,429 members of WEA Trust received at least two mailings for the mail‐based blood pressure and cholesterol intervention. These members then completed a follow‐up HRA in 2006. Change in the knowledge and risks of blood pressure and cholesterol values were analyzed among two‐time participants. A survey was also completed six to nine months after the first mailing to study participants' awareness and perception of the program.

Findings

The 2004 and 2006 two‐time HRA participants showed a 13.9 percentage point gain (p<0.05) and 12.2 percentage point gain (p<0.05) in people who knew their blood pressure and cholesterol values, respectively, as well as a significant increase in the percent of people taking medication or under medical care for their blood pressure (+2.9 for overall and +11.3 for BP≥140/90 population; p<0.05) or cholesterol conditions (+3.8 for overall and +11.4 for cholesterol≥240 population; p<0.05). Among those who knew their values (BP or cholesterol) in both 2004 and 2006, there was a 3.9 percentage point increase (p<0.05) in the number of people with normal BP (BP<120/80 mmHg) and a 4.8 percentage point increase (p<0.05) in the number of people with normal cholesterol (cholesterol <200 mg/dL) in 2006. The majority (83 percent) of survey respondents found the materials useful for improving health and 22 percent contacted a physician because of the information they received.

Practical implications

This relatively low‐cost and easily implemented educational intervention was successful in increasing knowledge of blood pressure and cholesterol values, taking control of blood pressure and cholesterol risks and in encouraging appropriate follow‐up with a physician.

Originality/value

Knowledge of blood pressure and cholesterol numbers are an important first step in raising awareness of a person's health risks and disease status.

Details

International Journal of Workplace Health Management, vol. 4 no. 3
Type: Research Article
ISSN: 1753-8351

Keywords

Article
Publication date: 4 November 2013

Sebastian H.W. Stanger, Richard Wilding, Evi Hartmann, Nicola Yates and Sue Cotton

Are lateral transshipments an effective instrument to ensure the safe and efficient supply of blood? This paper will use the lens of institutional theory to determine how…

1416

Abstract

Purpose

Are lateral transshipments an effective instrument to ensure the safe and efficient supply of blood? This paper will use the lens of institutional theory to determine how the blood supply chain can benefit from lateral transshipments and what requirements are necessary for their implementation. The paper aims to discuss these issues.

Design/methodology/approach

The research design comprises two stages. First, 16 case studies clustered into two case groups were conducted with transfusion laboratories in UK hospitals resulting in the derivation of eight key themes which were tested using a follow-up survey.

Findings

The blood supply chain acts under the influence of significant institutional pressures. Coercive pressures result from regulations enforced to ensure the safe supply of blood, normative pressures are imposed by society, demanding wastage is minimized and mimetic pressure from other hospitals fosters efficient supply chain operation. Lateral transshipments offer a powerful organizational tool to allow the blood supply chain to conform to these pressures.

Research limitations/implications

This paper offers a novel institutional perspective on a complex supply chain issue where additional external pressures are seen to complicate the context. Due to the special characteristics of the blood supply chain, generalization of the findings to other industries must be done with care.

Practical implications

The paper confirms the benefits of lateral transshipments in a perishable product context. Special requirements for the blood supply chain/health care services are identified.

Originality/value

The key contributions of this paper are five propositions which offer an institutional theory perspective on the application of lateral transshipment relationships in the blood supply chain.

Details

International Journal of Physical Distribution & Logistics Management, vol. 43 no. 9
Type: Research Article
ISSN: 0960-0035

Keywords

Article
Publication date: 1 June 1940

J.P. Lawrie, Rodolfo Margaria and h med.

THE medical problems of flying were first seriously tackled during the latter part of the first world war, when it became obvious that mechanical construction was…

Abstract

THE medical problems of flying were first seriously tackled during the latter part of the first world war, when it became obvious that mechanical construction was indivisible with pilot performance. Research has since proceeded along two main lines: pre‐selection of personnel for flying duties and the maintenance of the physiological efficiency of flying personnel. There is no doubt that the work accomplished is proving invaluable in these times of extended air force expansion and added interest is therefore given to the report of the symposium held at Washington D.C., at which Air‐Commodore H. E. Whittingham represented Great Britain.

Details

Aircraft Engineering and Aerospace Technology, vol. 12 no. 6
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 January 2005

Howard Taylor, George Fieldman and Saadi Lahlou

This article aims to describe the effects of the communication style of the message sender (threatening or neutral), status of the sender (equal to or higher than the…

725

Abstract

Purpose

This article aims to describe the effects of the communication style of the message sender (threatening or neutral), status of the sender (equal to or higher than the recipient) and the power relationship between sender and recipient (from the same department or not) on the blood pressure of the recipient of an e‐mail message

Design/methodology/approach

The study was conducted under controlled laboratory conditions. The experiment was a mixed design, using both within and between subjects variables. The independent variable for the within subjects factor was the task that participants performed. There were three tasks: answering a questionnaire, reading a non‐threateningly worded e‐mail reprimand, and reading a threateningly worded e‐mail reprimand. Although the study used students as participants, the messages they received were from real people in a University College. Discusses the implications in the area of occupational health.

Findings

Diastolic blood pressure was significantly higher (p<0.01) when recipients were reading the threateningly worded reprimand compared to reading a non‐threateningly worded reprimand. The effect of status on blood pressure was significant (p<0.05) but only for recipients in the same department as the message sender.

Originality/value

The results add to the evidence that communication style and status can have a direct impact on the recipient's physiological response.

Details

Journal of Managerial Psychology, vol. 20 no. 1
Type: Research Article
ISSN: 0268-3946

Keywords

Article
Publication date: 6 August 2019

Leila Jampour, Hadise Hashemi, Forouzan Behrouzian and Sima Jafarirad

In spite of the importance of food intake in weight management and preventing chronic diseases, it remains difficult to predict how anxious people change their eating…

182

Abstract

Purpose

In spite of the importance of food intake in weight management and preventing chronic diseases, it remains difficult to predict how anxious people change their eating behaviour in exposure to bad or good moods. The purpose of the study was to investigate the interaction effect of anxiety and different moods on food intake and blood pressure in healthy women students.

Design/methodology/approach

A total of 82 women university students (18-30 years) participated in the study. Subjects completed a valid anxiety questionnaire at baseline to measure trait and state anxiety scores, then they were randomly divided into two groups to watch comedy and drama movies for mood induction. After watching, some snacks were presented, and then energy intake and blood pressure were measured.

Findings

Students who suffered from severe state anxiety, consumed more energy from food when they watched a dramatic movie (p = 0.014). Subjects who suffered from moderate level of state anxiety and watched a dramatic movie experienced more systolic and diastolic blood pressure compared with subjects who suffered from moderate state anxiety but watched the comedy (p = 0.043 and p = 0.041, for systolic and diastolic blood pressure respectively). More diastolic blood pressure was shown among students who watched the drama movie and suffered from a severe level of trait anxiety (p = 0.049).

Research limitations/implications

Electrocardiography and stroke volume measurement were not used.

Originality/value

Our findings showed blood pressure elevation in anxious people when they experienced bad feeling such as sadness, and they also consumed more energy from food. Both of these factors are related to the occurrence of chronic disorders such as cardiovascular diseases.

Details

Nutrition & Food Science , vol. 50 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 13 August 2021

Mohammad Alshuniaber, Omar Alhaj, Qasem Abdallah and Haitham Jahrami

This study aims to investigate the antihypertensive effect of camel milk hydrolysate in rats with fructose-induced hypertension.

Abstract

Purpose

This study aims to investigate the antihypertensive effect of camel milk hydrolysate in rats with fructose-induced hypertension.

Design/methodology/approach

The antihypertensive effect of fermented camel milk was determined using 6 groups comprising 36 Wistar male rats. Blood pressure of rats was altered via exposure to a 10% fructose (w/v) diet in drinking water for 3 weeks before conducting 21 days of treatment. The authors conducted the experiment for short and long term using different doses of 800 and 1,200 mg/kg body weight. Serum was used to assay total cholesterol (TC), triglyceride (TG), glucose and insulin levels using standard biochemical kits.

Findings

The group that received 1,200 mg hydrolysate camel milk (HM) has significantly (p = 0.003) reduced systolic and diastolic blood pressure after a short exposure time (4–8 h). These effects were significantly (p = 0.005) comparable to the nifedipine (NIF) drug group. Similar long-term (21 days) effects on blood pressure were observed in 1,200 mg HM and NIF groups. Angiotensin-converting enzyme (ACE) activity and levels were also reduced in a correlation with blood pressure reduction only in HM1200 and HM800 treated groups. The authors observed no significant effect on blood pressure in groups receiving the 800 mg HM or 1,200 mg unhydrolyzed camel milk (UM). Rats receiving the 10% fructose diet showed significant differences from control rats regarding their blood biochemistry, including TG, TC, blood glucose and insulin levels. Rats in groups NIF, HM1200 and HM800 showed a significant (p < 0.05) reduction in serum glucose, insulin, TG and TC levels toward the baseline level.

Research limitations/implications

Further mechanistic investigation on the HM antihypertensive activity is highly recommended before suggesting HM as a product to reduce blood pressure. While drug–food interaction between HM and antihypertensive drugs, especially ACE inhibitors, is probable, UM seems not to affect blood pressure or ACE activity and therefore is expected to have no or minimal effects on the activity of other antihypertensive drugs. Investigation of ACE expression from various organs including lungs and leukocytes is highly recommended in future works using sodium dodecyl-sulfate polyacrylamide gel electrophoresis and western blot analysis or reverse transcription polymerase chain reaction.

Originality/value

No previous studies have measured the antihypertensive activity of milk hydrolysate mediated by the reduction of ACE activity and levels in plasma. Mechanisms involved in attenuating the levels of ACE warrant further investigation.

Details

Nutrition & Food Science , vol. 52 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Open Access
Article
Publication date: 6 December 2018

Nanthakan Woodham, Surasak Taneepanichskul, Ratana Somrongthong and Nanta Auamkul

Hypertension is a common disease among elderly. Adherence to antihypertensive medication is a key predictor of optimal blood pressure control that prevents the risk of…

2242

Abstract

Purpose

Hypertension is a common disease among elderly. Adherence to antihypertensive medication is a key predictor of optimal blood pressure control that prevents the risk of cardiovascular disease and potentially death. The purpose of this paper is to assess adherence to antihypertension and identify associated factors among the elderly in a rural area, Buengkan province, Thailand.

Design/methodology/approach

A health facilities based cross-sectional study was conducted in Buengkan district. A simple random sampling method was used to select 408 participants. A structured questionnaire adapted from the World Health Organization STEPwise approach was used to collect data. The medication adherence level was identified by pill count with percentage ⩾70 defined as good adherence. Descriptive and summary statistics were used. Bivariate analysis was done using Pearson’s χ2 test, and multivariable analyses were also carried out.

Findings

A total of 408 (143 males and 265 females) elderly hypertension patients with uncontrolled blood pressure participated in this study. Most of the participants were found to have lower adherence to medication treatment (86.8 percent), whereas the remaining ones (13.2 percent) were found to have good adherence. The multivariable logistic regression analysis showed that having a daughter as a care taker (adjust odd ratio=7.99, 95% confidence interval: 1.23–51.778) was significantly associated with high medical adherence.

Originality/value

Hypertension medication adherence among elderly patients with uncontrolled blood pressure was poor. Having a care taker, especially a daughter, is a key to improve adherence. Effective strategy to improve adherence should focus on and involve family participation into the program.

Details

Journal of Health Research, vol. 32 no. 6
Type: Research Article
ISSN: 2586-940X

Keywords

Article
Publication date: 1 January 1973

The new authorities created by this Act, probably the most important local government measure of the century, will be voted into existence during 1973 and commence…

Abstract

The new authorities created by this Act, probably the most important local government measure of the century, will be voted into existence during 1973 and commence functioning on 1st April 1974. Their responsibilities and the problems facing them are in many ways quite different and of greater complexity than those with which existing councils have had to cope. In its passage through the Lords, a number of amendments were made to the Act, but in the main, it is a scheme of reorganization originally produced after years of discussion and long sessions in the Commons. Local government reorganization in Scotland takes place one year later and for Northern Ireland, we must continue to wait and pray for a return of sanity.

Details

British Food Journal, vol. 75 no. 1
Type: Research Article
ISSN: 0007-070X

Article
Publication date: 1 October 1995

M.R. Law

Shows how blood pressure increases with age in Western communities,where the amount of salt in the diet is relatively high. A reduction insalt consumption would lower blood

1025

Abstract

Shows how blood pressure increases with age in Western communities, where the amount of salt in the diet is relatively high. A reduction in salt consumption would lower blood pressure, which, in turn, would result in a substantial reduction in mortality due to stroke and to heart disease.

Details

British Food Journal, vol. 97 no. 9
Type: Research Article
ISSN: 0007-070X

Keywords

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