Published: Nov. 26, 2024
Language: Английский
Physiological Measurement, Journal Year: 2025, Volume and Issue: 13(2), P. 025004 - 025004
Published: Jan. 24, 2025
Objective.This paper presents a novel dual-branch framework for estimating blood pressure (BP) using photoplethysmography (PPG) signals. The method combines deep learning with clinical prior knowledge and models different time periods (morning, afternoon, evening) to achieve precise, cuffless BP estimation.Approach.Preprocessed single-channel PPG signals are input into two feature extraction branches. first branch converts dimensions 2D uses pre-trained Mobile Vision Transformer-v2 (MobileViTv2) Visual Geometry Group19 (Vgg19) backbones extract features based on the mechanisms of systolic (SBP) diastolic (DBP) formation. second calculates multi-dimensional parameters relationship between waveforms factors affecting BP. We fuse from both branches consider diurnal variations, AutoML strategy construct specific SBP DBP estimation periods. algorithm was developed human resting state dataset (HRSD) validated MIMIC-IV generalization performance.Main results.The mean absolute error (MAE) is 6.42 mmHg 4.96 in morning, 4.84 3.73 2.65 2.56 evening. Performance database 4.34 3.11 (DBP). meets standards Association Advancement Medical Instrumentation achieves Grade A British Hypertension Society (BHS) standards.Significance. This indicates that it an accurate reliable non-invasive monitoring technology, applicable continuous health cardiovascular disease prevention.
Language: Английский
Citations
0
Clinica Chimica Acta, Journal Year: 2025, Volume and Issue: unknown, P. 120271 - 120271
Published: April 1, 2025
Increased cardiovascular mortality due to multifactorial progressive arterial stiffness in chronic kidney disease is influenced by the disturbed balance between inducers and inhibitors of vascular calcification. The potential enhance protective effects calcification through effective therapy could stimulate further research collaboration. This systematic review aims give a grounded overview their serum levels different stages demonstrate dynamics during declining function renal replacement therapy. was registered PROSPERO database on August 30th, 2023 (CRD42023459169). conducted accordance with Preferred Reporting Items for Systematic Reviews Meta-Analyzes (PRISMA). We screened 463 articles, which 192 were eligible, investigated or included values levels. Serum fetuin-A, vitamin D, FGF-23, Klotho, osteopontin, matrix GLA protein, osteoprotegerin, magnesium, sclerostin are demonstrated tables sparingly studied substances perspective towards better treatment options found Supplementary Table. Endogenous serve role valuable biomarkers detect process earlier estimate effect treatment. presented propose practical feedback personalized strategies. Manifold possible under set promising starting point more therapeutic interventions.
Language: Английский
Citations
0
Photonics, Journal Year: 2025, Volume and Issue: 12(5), P. 430 - 430
Published: April 29, 2025
Asymptomatic peripheral artery disease (PAD) poses a silent risk, potentially leading to severe conditions if undetected. Integrating new screening tools into routine general practitioner (GP) visits could enable early detection. This study investigates the feasibility of photoplethysmography (PPG) monitoring for assessing vascular health across different blood pressure (BP) conditions. Custom femoral phantoms representing healthy (0.82 MPa), intermediate (1.48 and atherosclerotic (2.06 MPa) vessels were tested under hypertensive, normotensive, hypotensive evaluate PPG’s ability distinguish between states. Extracted features from PPG signal, including amplitude, area curve (AUC), median upslope–downslope ratio, end datum difference, analysed. Kruskal–Wallis tests revealed significant differences unhealthy BP states, supporting as tool. The fiducial points second derivative signal (SDPPG) ba ratio was most pronounced hypertensive (ranging –2.13 –2.06), suggesting change in wall distensibility. Under normotensive conditions, difference ratios smaller (0.01), no meaningful observed reduced sensitivity this metric at lower perfusion pressures. Intermediate states challenging detect, particularly hypotension, need further research. Nonetheless, highlights promise identifying stiffness.
Language: Английский
Citations
0
Life, Journal Year: 2024, Volume and Issue: 14(9), P. 1105 - 1105
Published: Sept. 2, 2024
This study evaluated the relationship of non-invasive arterial stiffness parameters with an individual 10-year risk fatal and non-fatal atherosclerotic cardiovascular disease (ASCVD) events in cohort post-coronavirus 2019 (COVID-19). The group included 203 convalescents aged 60.0 (55.0–63.0) 115 (56.7%) women. ASCVD was assessed as low to moderate very high based on medical history (for 62 participants pre-existing ASCVD/diabetes/chronic kidney entire cohort) or calculated percentages using Systemic Coronary Risk Evaluation 2 (SCORE2) algorithm age, sex, smoking status, systolic blood pressure (BP), non-high-density lipoprotein cholesterol 141 healthy participants). index (SI) reflection (RI) measured by photoplethysmography, well pulse (PP), difference between diastolic BP, were markers stiffness. Stiffness increased significantly increase cohort. In 30 (14.8%) patients low- moderate-risk group, median SI 8.07 m/s (7.10–8.73), RI 51.40% (39.40–65.60), PP 45.50 mmHg (40.00–57.00); 111 (54.7%) high-risk 8.70 (7.40–10.03), 57.20% (43.65–68.40), 54.00 (46.00–60.75); (30.5%) very-high-risk 9.27 (7.57–10.44), 59.00% (50.40–72.40), 60.00 (51.00–67.00). participants, ≤ 9.0 (sensitivity 92.31%, area under curve [AUC] 0.686, p < 0.001) receiver operating characteristics most sensitive variable for discriminating risk, > 56.0 74.36%, AUC 0.736, used risk. multivariate logistic regression, younger female 50 mmHg, m/s, triglycerides 150 mg/dL had best SCORE2 turn, older currently smoking, 68.6%, BP ≥ 90 related conclusion, is post-COVID-19 can be helpful a single marker everyday practice. Cut-off points determined may help make decisions about implementing lifestyle changes pharmacological treatment factors
Language: Английский
Citations
3
Sensors, Journal Year: 2024, Volume and Issue: 24(14), P. 4572 - 4572
Published: July 15, 2024
Background: Hypertension and atherosclerotic cardiovascular diseases (ASCVD) increase risk worsen patients’ prognoses. One early predictor of increased is a change in arterial stiffness. This study aimed to evaluate stiffness parameters using the non-invasive photoplethysmography (PPG) method Polish patients with hypertension (AH) and/or atherosclerosis (AS). Methods: The group consisted 333 (Caucasians, both sexes, aged 30–85 years old). Patients were analyzed four groups depending on AH AS (Group I: without or AS, Group II: patients, III: IV: AH/AS patients) and, addition, according sex history SARS-CoV-2 infection. Arterial parameters, i.e., reflection index (RI), peak-to-peak time (PPT), (SI) automatically calculated PPG based analysis pulse wave contour. Results: Mean values RI SI higher men than women (p < 0.001 each). Diastolic blood pressure (DBP) also differed between sexes = 0.010). 0.038) highest found AS/AH lowest—in AS. mean significantly lower compared I II 0.006 p 0.001, respectively). greater for each group). Regarding COVID-19 history, only HR 0.012). In had 0.001). On other hand, (9.66 m/s ± 1.61) (7.98 1.09) 0.045). Conclusions: present confirmed that significant impact parameters. Both affected Heart rate was hypertensive after COVID-19.
Language: Английский
Citations
2
Advanced ultrasound in diagnosis and therapy, Journal Year: 2024, Volume and Issue: 8(4), P. 172 - 172
Published: Jan. 1, 2024
Language: Английский
Citations
1
Sensors, Journal Year: 2024, Volume and Issue: 24(5), P. 1681 - 1681
Published: March 5, 2024
Age-related vessel deterioration leads to changes in the structure and function of heart blood vessels, notably stiffening walls, increasing risk developing cardiovascular disease (CVD), which accounts for 17.9 million global deaths annually. This study describes fabrication custom-made silicon vessels with varying mechanical properties (arterial stiffness). The primary objective this was explore how silicone formulations influenced their correlation features extracted from signals obtained photoplethysmography (PPG) reflectance sensors an vitro setting. Through alterations formulations, it found that is possible create elastomers exhibiting elasticity range 0.2 MPa 1.22 MPa. It observed altering significantly impacted PPG signal morphology, particularly reducing amplitude stiffness (p < 0.001). A p-value 5.176 × 10−15 1.831 10−14 reported red infrared signals, respectively. has been concluded a femoral artery can be recreated using material, addition softener achieve required properties. research lays foundation future studies replicate healthy unhealthy vascular systems. Additional pathologies introduced by carefully adjusting elastomer materials or incorporating geometrical consistent various CVDs.
Language: Английский
Citations
0
Journal of Clinical Sleep Medicine, Journal Year: 2024, Volume and Issue: 20(9), P. 1435 - 1444
Published: Sept. 1, 2024
This study investigated the impact of automatic positive airway pressure (APAP) therapy on vascular behavior and its potential to lower cardiovascular risk in patients with obstructive sleep apnea (OSA), as well differentiating APAP heterogeneity.
Language: Английский
Citations
0
Sensors, Journal Year: 2024, Volume and Issue: 24(19), P. 6222 - 6222
Published: Sept. 26, 2024
A fiber Bragg grating (FBG) pulse and systolic blood pressure (SBP) measurement system based on the edge-filtering method is proposed. The edge filter Mach–Zehnder interferometer (MZI) fabricated by two couplers with a linear slope of 52.45 dBm/nm. developed consists broadband light source, an filter, gratings (FBGs), coarse wavelength-division multiplexer (CWDM), signal-processing circuits field-programmable gate array (FPGA). It can simultaneously measure pulsations radial artery in wrist at three positions: Cun, Guan Chi. SBP be calculated transit time (PTT) principle. results compared to standard monitor showed mean absolute error (MAE) deviation (STD) were 0.93 ± 3.13 mmHg. meets requirements Association for Advancement Medical Instrumentation (AAMI) equipment standards. proposed achieve continuous real-time has advantages fast detection speed, stable performance, no compression sensation subjects. important application value fields human health monitoring medical device development.
Language: Английский
Citations
0
Sensors, Journal Year: 2024, Volume and Issue: 24(20), P. 6505 - 6505
Published: Oct. 10, 2024
Inversion of the photoplethysmographic (PPG) signal is a rarely reported case. This anomaly can have implications for PPG-based cardiovascular assessments. The conditions PPG inversion in vicinity dorsalis pedis (DPA) artery foot were investigated. Wireless multi-wavelength sensing with skin-probe contact pressure and local skin temperature studied at different sensor positions, occurrence (OOI) was Twelve healthy adult volunteers over four LED wavelengths three levels 11 probe positions. A novel algorithm quantified proportion inverted samples respect to abovementioned variables. Our classifying vs. non-inverted pulses achieved 98.3% accuracy. Ten participants had least one identified. impact interindividual variation on prevalence large, but LEDs, relative position DPA also affected OOI. Skin surface room temperatures showed no Lateral measurements 39.6% more maximum compared minimum pressure. Mechanical capillary bed variations arterial reflections during venous engorgement are considered viable explanations our observations. These findings motivate an expanded study inversion.
Language: Английский
Citations
0