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Anesthesiology Feb 2019
Review
Topics: Blood Pressure; Blood Pressure Determination; Humans; Hypertension; Hypotension; Medical Missions; Monitoring, Physiologic; Sphygmomanometers
PubMed: 30260896
DOI: 10.1097/ALN.0000000000002469 -
The American Journal of Gastroenterology Nov 2001
Topics: Equipment Design; History, 20th Century; Sphygmomanometers
PubMed: 11721769
DOI: 10.1111/j.1572-0241.2001.05279.x -
Sensors (Basel, Switzerland) Oct 2023There is a worldwide need to improve blood pressure (BP) measurement error in order to correctly diagnose hypertension. Cardiovascular diseases cause 17.9 million deaths...
There is a worldwide need to improve blood pressure (BP) measurement error in order to correctly diagnose hypertension. Cardiovascular diseases cause 17.9 million deaths annually and are a substantial monetary strain on healthcare. The current measurement uncertainty of 3 mmHg should be improved upon. Dynamic pressure measurement standards are lacking or non-existing. In this study we propose a novel method of measuring air pressure inside the sphygmomanometer tubing during BP measurement using a condenser microphone. We designed, built, and tested a system that uses a radiofrequency (RF) modulation method to convert changes in capacitance of a condenser microphone into pressure signals. We tested the RF microphone with a low-frequency (LF) sound source, BP simulator and using a piezoresistive pressure sensor as a reference. Necessary tests were conducted to assess the uncertainty budget of the system. The RF microphone prototype has a working frequency range from 0.5 Hz to 280 Hz in the pressure range from 0 to 300 mmHg. The total expanded uncertainty (k = 2, = 95.5%) of the RF microphone was 4.32 mmHg. The proposed method could establish traceability of BP measuring devices to acoustic standards described in IEC 61094-2 and could also be used in forming dynamic BP standards.
Topics: Humans; Blood Pressure Determination; Sphygmomanometers; Hypertension; Sound; Acoustics; Blood Pressure
PubMed: 37837170
DOI: 10.3390/s23198340 -
Physiotherapy Theory and Practice Feb 2015Muscle strength measurement is a key component of physiotherapists' assessment and is frequently used as an outcome measure. A sphygmomanometer is an instrument commonly... (Review)
Review
BACKGROUND
Muscle strength measurement is a key component of physiotherapists' assessment and is frequently used as an outcome measure. A sphygmomanometer is an instrument commonly used to measure blood pressure that can be potentially used as a tool to assess isometric muscle strength.
OBJECTIVE
To systematically review the evidence on the reliability and validity of a sphygmomanometer for measuring isometric strength of hip muscles.
METHOD
A literature search was conducted across four databases. Studies were eligible if they presented data on reliability and/or validity, used a sphygmomanometer to measure isometric muscle strength of the hip region, and were peer reviewed. The individual studies were evaluated for quality using a standardized critical appraisal tool.
RESULTS
A total of 644 articles were screened for eligibility, with five articles chosen for inclusion. The use of a sphygmomanometer to objectively assess isometric muscle strength of the hip muscles appears to be reliable with intraclass correlation coefficient values ranging from 0.66 to 0.94 in elderly and young populations. No studies were identified that have assessed the validity of a sphygmomanometer.
CONCLUSION
The sphygmomanometer appears to be reliable for assessment of isometric muscle strength around the hip joint, but further research is warranted to establish its validity.
Topics: Hip Joint; Humans; Isometric Contraction; Muscle Strength; Observer Variation; Sphygmomanometers
PubMed: 25286193
DOI: 10.3109/09593985.2014.963905 -
Vascular Jun 2022Iatrogenic guidewire perforation is a well-known complication of lower extremity angioplasty that is often benign or can be easily treated with endovascular techniques....
OBJECTIVES
Iatrogenic guidewire perforation is a well-known complication of lower extremity angioplasty that is often benign or can be easily treated with endovascular techniques. However, perforations that occur in arterial side branches may be more challenging to manage. If bleeding persists, open surgery and fasciotomy may be required to evacuate the resulting hematoma and prevent compartment syndrome. These subsequent procedures increase morbidity and, if the angioplasty was performed in the outpatient setting, necessitate patient transfer to a hospital. To address these challenges, we describe a non-invasive hemostasis technique involving serial sphygmomanometer cuff inflations over the affected site in a series of five patients who experienced this complication at our office.
METHODS
We retrospectively reviewed the medical records of consecutive patients undergoing lower extremity angioplasty that were found to have an arterial guidewire perforation on completion angiogram at our outpatient center between February 2012 and February 2017. Patients found to have iatrogenic guidewire perforations were administered intravenous protamine sulfate and were transferred to the surgical recovery room. Patients received ibuprofen or acetaminophen for pain management. A blood pressure cuff was placed around the site of perforation, and patients received serial cuff inflation cycles with repeated examinations of both limbs until patients reported cessation of pain and there were no signs of a developing hematoma. Patients were observed for two hours before they were discharged home. A follow-up duplex ultrasound examination was completed within one week of the intervention.
RESULTS
Over the course of five years, 536 angioplasties were performed at our outpatient office. Five of these patients experienced iatrogenic guidewire perforation (0.93%). Perforations occurred in branches of the anterior or posterior tibial artery. All of these patients were successfully managed with the aforementioned hemostasis technique. None of these patients required transfer to a hospital for further management, and no complications were reported at follow-up.
CONCLUSIONS
Complications of iatrogenic guidewire perforations in lower extremity arterial side branches can be safely and effectively managed by applying external compression around the affected site with an automatic blood pressure cuff.
Topics: Angioplasty; Hematoma; Hemostasis; Humans; Iatrogenic Disease; Lower Extremity; Retrospective Studies; Sphygmomanometers; Treatment Outcome
PubMed: 34037487
DOI: 10.1177/17085381211016732 -
Journal of Hypertension Dec 2010Hypertension is a leading risk factor for mortality. Detecting, treating and monitoring hypertensive patients require accurate blood pressure measurements. Protocols for... (Review)
Review
Hypertension is a leading risk factor for mortality. Detecting, treating and monitoring hypertensive patients require accurate blood pressure measurements. Protocols for validation of automatic sphygmomanometers exist, but quality control of validations is limited to peer review of published reports, which has severe limitations. An extensive international measurement framework provides quality assurance, traceability and laboratory accreditation for many measurements that are important to society, including industrial, scientific and trade measurements, medical imaging and medical laboratory testing. An important part of this quality assurance is external accreditation of laboratories that perform testing and calibration to the international standard ISO 17025 General requirements for the competence of testing and calibration laboratories. Automatic sphygmomanometer validation is a form of calibration and deserves quality control at least as good as other tests and calibrations that are important to society. It is suggested that laboratories that perform automatic sphygmomanometer validations should participate in the international measurement framework and be externally accredited by accrediting agencies that are members of the International Laboratory Accreditation Cooperation.
Topics: Automation; Blood Pressure; Humans; Quality Control; Sphygmomanometers
PubMed: 20706130
DOI: 10.1097/HJH.0b013e32833e1011 -
Journal of Public Health Policy Feb 2011The mercury sphygmomanometer was introduced over 100 years ago. Mercury, however, is a potent human neurotoxin. An international effort has developed to eliminate... (Review)
Review
The mercury sphygmomanometer was introduced over 100 years ago. Mercury, however, is a potent human neurotoxin. An international effort has developed to eliminate health-care sources of mercury--the thermometer and sphygmomanometer--and replace them with less toxic alternatives. There is concern regarding the accuracy of these alternative devices. We conducted a literature review of articles published between 1995 and 2009 evaluating the accuracy of mercury, aneroid, and oscillometric blood pressure devices. Mercury sphygmomanometers fared the best although they do not always perform as expected, failing calibration tests between 1 and 28 per cent of the time. Up to 61 per cent of aneroid sphygmomanometers failed. Recently calibrated aneroid devices performed well. Oscillometric devices were less studied and their performance was variable. All three devices showed variable performance. They should be validated before purchase and calibrated on a regular basis.
Topics: Blood Pressure Determination; Equipment Failure; Humans; Mercury Poisoning; Reproducibility of Results; Safety; Sphygmomanometers
PubMed: 21109765
DOI: 10.1057/jphp.2010.38 -
Journal of Medical Engineering &... Nov 2021More than quarter of world's population is consumed by hypertension, leading to premature death of thousands of people per year across the globe. One of the major...
More than quarter of world's population is consumed by hypertension, leading to premature death of thousands of people per year across the globe. One of the major reasons behind hypertension misdiagnosis is inaccurate blood pressure (BP) measurements, which can be attributed to various human or instrumentation errors. Currently used BP measuring sphygmomanometers, suffers from poor reliability, performance deterioration over time or are unable to meet environmental protection protocols. In this article, we propose a low-cost, highly portable, light-weight, easily manufacturable, battery operated, mercury free, auscultation based digital sphygmomanometer - Auscl-D, for easy and accurate BP measurements. The proposed device can be made from easily available components with cheap manufacturing processes available throughout globe, even in remote areas. The device demonstrated to have accuracy comparable to mercury sphygmomanometer, which is the gold-standard for BP measurements. The preliminary clinical trials were conducted at Dayanand Medical College & Hospital (DMCH) (Ludhiana, India), to compare the performance of proposed device with commonly used aneroid sphygmomanometers employing the auscultatory method and validated oscillometric sphygmomanometers from MicroLife. The test results show good agreement for systolic and diastolic BP measurements taken using Auscl-D device compared to the aneroid and oscillometric types. This shows the potential of proposed design to serve as low-cost, highly portable replacement for conventionally used sphygmomanometers, without the toxicity and reliability issues.
Topics: Auscultation; Blood Pressure; Blood Pressure Determination; Humans; Reproducibility of Results; Sphygmomanometers
PubMed: 34254871
DOI: 10.1080/03091902.2021.1946182 -
Journal of Human Hypertension Jun 2021
Topics: Blood Pressure Determination; Humans; Mercury; Museums; Sphygmomanometers
PubMed: 33288858
DOI: 10.1038/s41371-020-00462-8 -
Clinical and Experimental Hypertension... Dec 2024The objective was to utilize a smartwatch sphygmomanometer to predict new-onset hypertension within a short-term follow-up among individuals with high-normal blood...
OBJECTIVES
The objective was to utilize a smartwatch sphygmomanometer to predict new-onset hypertension within a short-term follow-up among individuals with high-normal blood pressure (HNBP).
METHODS
This study consisted of 3180 participants in the training set and 1000 participants in the validation set. Participants underwent both ambulatory blood pressure monitoring (ABPM) and home blood pressure monitoring (HBPM) using a smartwatch sphygmomanometer. Multivariable Cox regressions were used to analyze cumulative events. A nomogram was constructed to predict new-onset hypertension. Discrimination and calibration were assessed using the C-index and calibration curve, respectively.
RESULTS
Among the 3180 individuals with HNBP in the training set, 693 (21.8%) developed new-onset hypertension within a 6-month period. The nomogram for predicting new-onset hypertension had a C-index of 0.854 (95% CI, 0.843-0.867). The calibration curve demonstrated good agreement between the nomogram's predicted probabilities and actual observations for short-term new-onset hypertension. In the validate dataset, during the 6-month follow-up, the nomogram had a good C-index of 0.917 (95% CI, 0.904-0.930) and a good calibration curve. As the score increased, the risk of new-onset hypertension significantly increased, with an HR of 8.415 (95% CI: 5.153-13.744, = .000) for the middle-score vs. low-score groups and 86.824 (95% CI: 55.071-136.885, = .000) for the high-score vs. low-score group.
CONCLUSIONS
This study provides evidence for the use of smartwatch sphygmomanometer to monitor blood pressure in individuals at high risk of developing new-onset hypertension in the near future.
TRIAL REGISTRATION
ChiCTR2200057354.
Topics: Humans; Blood Pressure; Cohort Studies; Blood Pressure Monitoring, Ambulatory; Hypertension; Sphygmomanometers; Nomograms
PubMed: 38346228
DOI: 10.1080/10641963.2024.2304023