scholarly journals In-Ear Pulse Rate Measurement: A Valid Alternative to Heart Rate Derived from Electrocardiography?

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3641 ◽  
Author(s):  
Passler ◽  
Müller ◽  
Senner
Keyword(s):  
Heart Rate ◽  
Pulse Rate ◽  
Gold Standard ◽  
Rate Measurement ◽  
Motion Artefacts ◽  
Promising Technique ◽  
Intra Class Correlation ◽  
Accuracy And Precision ◽  
Measurement Devices ◽  
Intra Class Correlation Coefficient

Heart rate measurement has become one of the most widely used methods of monitoring the intensity of physical activity. The purpose of this study was to assess whether in-ear photoplethysmographic (PPG) pulse rate (PR) measurement devices represent a valid alternative to heart rate derived from electrocardiography (ECG), which is considered a gold standard. Twenty subjects (6 women, 14 men) completed one trial of graded cycling under laboratory conditions. In the trial, PR was recorded by two commercially available in-ear devices, the Dash Pro and the Cosinuss°One. They were compared to HR measured by a Bodyguard2 ECG. Validity of the in-ear PR measurement devices was tested by ANOVA, mean absolute percentage errors (MAPE), intra-class correlation coefficient (ICC), and Bland–Altman plots. Both devices achieved a MAPE ≤5%. Despite excellent to good levels of agreement, Bland–Altman plots showed that both in-ear devices tend to slightly underestimate the ECG’s HR values. It may be concluded that in-ear PPG PR measurement is a promising technique that shows accurate but imprecise results under controlled conditions. However, PPG PR measurement in the ear is sensitive to motion artefacts. Thus, accuracy and precision of the measured PR depend highly on measurement site, stress situation, and exercise.

scholarly journals Intra-Subject Variability of 5 Km Time Trial Performance Completed by Competitive Trained Runners

2017 ◽  
Vol 57 (1) ◽  
pp. 139-146 ◽  
Author(s):  
James Fisher ◽  
Thomas Clark ◽  
Katherine Newman-Judd ◽  
Josh Arnold ◽  
James Steele
Keyword(s):  
Heart Rate ◽  
Correlation Coefficient ◽  
Perceived Exertion ◽  
Time Trial ◽  
Rating Of Perceived Exertion ◽  
Intra Class Correlation ◽  
Subject Variability ◽  
Trained Runners ◽  
Intra Class Correlation Coefficient ◽  
Trial Performance

AbstractTime-trials represent an ecologically valid approach to assessment of endurance performance. Such information is useful in the application of testing protocols and estimation of sample sizes required for research/magnitude based inference methods. The present study aimed to investigate the intra-subject variability of 5 km time-trial running performance in trained runners. Six competitive trained male runners (age = 33.8 ± 10.1 years; stature = 1.78 ± 0.01 m; body mass = 69.0 ± 10.4 kg, $\it V^{.}$ O2max = 62.6 ± 11.0 ml·kg·min-1) completed an incremental exercise test to volitional exhaustion followed by 5 x 5 km time-trials (including a familiarisation trial), individually spaced by 48 hours. The time taken to complete each trial, heart rate, rating of perceived exertion and speed were all assessed. Intra-subject absolute standard error of measurement and the coefficient of variance were calculated for time-trial variables in addition to the intra-class correlation coefficient for time taken to complete the time-trial. For the primary measure time, results showed a coefficient of variation score across all participants of 1.5 ± 0.59% with an intra-class correlation coefficient score of 0.990. Heart rate, rating of perceived exertion and speed data showed a variance range between 0.8 and 3.05%. It was concluded that when compared with related research, there was observed low intra-subject variability in trained runners over a 5 km distance. This supports the use of this protocol for 5 km time-trial performance for assessment of nutritional strategies, ergogenic aids or training interventions on endurance running performance.

scholarly journals Heart Rate Measurement based on Color Signal Extraction

2019 ◽  
Vol 8 (10) ◽  
pp. 1990-1993
Keyword(s):  
Heart Rate ◽  
Pulse Rate ◽  
Vital Signs ◽  
The Body ◽  
Signal Extraction ◽  
Rate Measurement ◽  
Heart Rate Measurement ◽  
Blue Channel ◽  
Color Channels

Photoplethysmography measures vital signs through to extraction of signals from the body. The paper explains the technique for extraction of pulse rate from the videos for three color channels namely; red, green and blue. The DMIMS database is used for experimentation which consists of total 720 videos out of which 25 videos are used for analysis. The results presented in this paper depict that our algorithm works best for blue channel followed by green and then red channel. The main focus of paper is to extract pulse rate from the recorded video and compare the output for different channels and find the best channel for heart rate extraction.

scholarly journals Fusion of intra-oral scans in cone-beam computed tomography scans

2020 ◽  
Vol 25 (1) ◽  
pp. 77-85 ◽  
Author(s):  
F. Baan ◽  
R. Bruggink ◽  
J. Nijsink ◽  
T. J. J. Maal ◽  
E. M. Ongkosuwito
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Gold Standard ◽  
Degrees Of Freedom ◽  
Cone Beam ◽  
Intra Class Correlation ◽  
Six Degrees Of Freedom ◽  
Software Packages ◽  
High Level ◽  
Intra Class Correlation Coefficient

Abstract Purpose The purpose of this study was to evaluate the clinical accuracy of the fusion of intra-oral scans in cone-beam computed tomography (CBCT) scans using two commercially available software packages. Materials and methods Ten dry human skulls were subjected to structured light scanning, CBCT scanning, and intra-oral scanning. Two commercially available software packages were used to perform fusion of the intra-oral scans in the CBCT scan to create an accurate virtual head model: IPS CaseDesigner® and OrthoAnalyzer™. The structured light scanner was used as a gold standard and was superimposed on the virtual head models, created by IPS CaseDesigner® and OrthoAnalyzer™, using an Iterative Closest Point algorithm. Differences between the positions of the intra-oral scans obtained with the software packages were recorded and expressed in six degrees of freedom as well as the inter- and intra-observer intra-class correlation coefficient. Results The tested software packages, IPS CaseDesigner® and OrthoAnalyzer™, showed a high level of accuracy compared to the gold standard. The accuracy was calculated for all six degrees of freedom. It was noticeable that the accuracy in the cranial/caudal direction was the lowest for IPS CaseDesigner® and OrthoAnalyzer™ in both the maxilla and mandible. The inter- and intra-observer intra-class correlation coefficient showed a high level of agreement between the observers. Clinical relevance IPS CaseDesigner® and OrthoAnalyzer™ are reliable software packages providing an accurate fusion of the intra-oral scan in the CBCT. Both software packages can be used as an accurate fusion tool of the intra-oral scan in the CBCT which provides an accurate basis for 3D virtual planning.

scholarly journals The smartphone as a tool to screen for scoliosis, applicable by everyone

2021 ◽  
Author(s):  
H. M. van West ◽  
J. Herfkens ◽  
J. P. H. J. Rutges ◽  
M. Reijman
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Research Question ◽  
Bending Test ◽  
Trunk Rotation ◽  
Intra Class Correlation ◽  
Orthopedic Surgeon ◽  
Accuracy And Precision ◽  
Forward Bending ◽  
Intra Class Correlation Coefficient

Abstract Purpose (main purposes and research question) The purpose of this study is to assess the accuracy and precision of the smartphone with application and casing (Scolioscreen) compared to the Scoliometer. Methods The Axial Trunk Rotation (ATR) was measured in adolescent scoliosis patients visiting the outpatient clinic while performing the Adam Forward Bending Test. The Scolioscreen measurements were performed by the orthopedic surgeon and a parent. They were compared to the measurement with the Scoliometer by the orthopedic surgeon, the gold standard. The accuracy was determined with the Pearson’s correlation coefficient, and precision was determined by assessing the intra- and inter-variability with the intra-class correlation coefficient (ICC). Results Fifty patients with adolescent idiopathic scoliosis (44 girls) were included with a mean age of 14.1 years and a mean Cobb angle of 38.5°. The accuracy of both the parents and orthopedic surgeon was excellent with a Pearson correlation coefficient of 0.92 and 0.97, respectively. All the ICC’s, both intra- and inter-observer, were over 0.92 demonstrating excellent precision. Conclusion This study confirms the accuracy and precision of the Scolioscreen when measuring the ATR on patients with AIS. Therefore, the Scoliometer can be replaced by the more easily available Scolioscreen which can be used by both physician and parents.

scholarly journals Development of a Radiographic Index for Periodontitis

2021 ◽  
Vol 9 (2) ◽  
pp. 19
Author(s):  
Zeyad M. H. Shaker ◽  
Azin Parsa ◽  
Keyvan Moharamzadeh
Keyword(s):  
Correlation Coefficient ◽  
Gold Standard ◽  
Alveolar Bone ◽  
Strong Association ◽  
Visual Interpretation ◽  
Intra Class Correlation ◽  
Furcation Involvement ◽  
The Mean ◽  
Examiner Agreement ◽  
Intra Class Correlation Coefficient

The use of radiographic indices is noticeably diminished due to the lack of simplicity and standardisation among the existing ones. The aim of this study was to introduce a radiographic index to aid clinicians in determining the extent and severity of interproximal alveolar bone loss (iABL), in relation to individual root lengths, among patients suffering from periodontitis. A retrospective analysis of 50 anonymised dental panoramic tomograms (DPTs) of patients with periodontitis was conducted. Visual interpretation of iABL was recorded by a single investigator and by 20 volunteering clinicians for the ‘worst site’ in each quintet. Results were compared to a gold standard quantification method. Intra-examiner and inter-examiner agreement were measured using the Kappa coefficient and the intra-class correlation coefficient, respectively. Validity was assessed using Cramér’s V test. The mean intra-examiner agreement on the severity and pattern of iABL was 0.808 (K) and 0.802 (K), respectively. A stronger overall inter-examiner agreement was noted when the severity in contrast to the pattern of iABL and presence/absence of furcation involvement were analysed. The statistically significant total mean agreement values from this correlation coefficient were 0.892 and 0.739, respectively. A very strong association between all the visual interpretations carried out by all participants and the gold standard measurements was evident. Within the limitations of this study, the proposed radiographic index may serve as a simple, yet valid and reliable, adjunctive screening tool to further assist clinicians in determining the extent and severity of iABL in patients with periodontitis.

scholarly journals The endoscopic evaluation of the oral phase of swallowing (Oral-FEES, O-FEES): a pilot study of the clinical use of a new procedure

2017 ◽  
Vol 37 (3) ◽  
pp. 201-206
Author(s):  
D. Farneti ◽  
B. Fattori ◽  
L. Bastiani
Keyword(s):  
Pilot Study ◽  
Gold Standard ◽  
Repeated Measure ◽  
Clinical Use ◽  
Endoscopic Evaluation ◽  
Intra Class Correlation ◽  
Measure Analysis ◽  
Repeated Measure Analysis ◽  
Single Score ◽  
Intra Class Correlation Coefficient

O-FEES (O-FEES) è una procedura endoscopica, concepita per visualizzare direttamente la fase orale della deglutizione. Nella prospettiva di un utilizzo clinico, la fattibilità, la sicurezza e l’accettabilità dell’O-FEES è stata inizialmente valutata. Successivamente, la procedura è stata confrontata con il gold standard radiologico. L’accettabilità dell’O-FEES è stata confrontata con quello della FEES per mezzo di un questionario a dieci punti, sottoposto ad un campione di 52 pazienti ambulatoriali che lamentavano di disturbi della deglutizione. Il modello Repeated measure analysis of variance (rm-ANOVA) è stato utilizzato per testare la differenza media di accettabilità delle due procedure nello stesso soggetto. Successivamente un altro campione di 8 pazienti ambulatoriali di sesso maschile, è stato sottoposto alla registrazione simultanea di O-FEES e videfluoroscopia (VFSS). L’affidabilità inter-individuale, utilizzando 10 parametri radiologici di riferimento, fra O-FEES e VFSS, è stata determinata alla cieca tra due giudici. La concordanza inter-individuale tra i due giudici, per i punteggi di O-FEES e della VFSS è stata determinata con il Single score intra-class correlation coefficient (ICC). Le differenze FEES e O-FEES tra le risposte per ogni domanda e tra tutte le domande considerate, sono risultate statisticamente significative (rm-ANOVA; F-statistica p < 0,001). La concordanza inter-individuale fra la valutazione endoscopica e radiologiche tra i due valutatori, ha mostrato una forte correlazione intra-classe (ICC) (intervallo di confidenza al 95%): 0,875 (0,373-0,979) e 0,921 (0,542-0,986) rispettivamente. Il test di Bland-Altman suggerisce che le due metodiche producono risultati analoghi. Nella pratica clinica e confrontata con la FEES, l’O-FEES è una procedura tollerata e sicura. Rispetto al gold standard radiologico, l’O-FEES offre informazioni affidabili sulla preparazione e propulsione orale del bolo.

scholarly journals First Evaluation of the PTN-104 Plethysmographic Sensor for Heart Rate Measurement

2021 ◽  
Vol 21 (5) ◽  
pp. 117-122
Author(s):  
Wiesław Szaj ◽  
Wiktoria Wojnarowska ◽  
Bogdan Pajdo
Keyword(s):  
Heart Rate ◽  
Pulse Oximeter ◽  
Gold Standard ◽  
Index Finger ◽  
Rest Period ◽  
Rate Measurement ◽  
Gold Standard Method ◽  
Lower Accuracy ◽  
Validity Criteria ◽  
Healthy Participants

Abstract The purpose of this study was to examine the accuracy of HR measurements by the PTN-104 sensor in comparison to the fingertip pulse oximeter, which is a photoplethysmographic sensor (PPG). Twelve healthy participants underwent the same protocol during a single visit. Measurements were taken after each participant completed an initial rest period of 5 minutes and after 1-minute of exercising comprising of 30 squats. Each subject had the PTN-104 sensor attached to the index finger and a fingertip pulse oximeter to the opposite one. When examining the data in aggregate, there was a strong correlation between the PTN-104 sensor and PPG for HR (r = 0.988) with a mean bias of −2.55 bpm (95 % LoA +5.0, −10.1). The PTN-104 sensor satisfied validity criteria for HR monitors, however, showed a lower accuracy for measurements at rest, which is surprising. Due to the noticed limitations, this study should be repeated with a larger group of subjects and the PTN-104 sensor should be compared to the gold standard method for measuring HR, which is ECG.

Enhanced Brady-Tachy Heart Automotive (BT-Heartomotive) Device for Heart Rate Monitoring during Driving

2020 ◽  
Vol 17 (1) ◽  
pp. 7599-7606
Author(s):  
M. A. H. Mohd Adib ◽  
N. H. M. Hasni
Keyword(s):  
Heart Rate ◽  
Mobile Applications ◽  
Good Accuracy ◽  
Rate Measurement ◽  
Road Accidents ◽  
Heart Rate Monitoring ◽  
Physical Conditions ◽  
Car Accidents ◽  
Heart Rate Level ◽  
Main Components

Driving with brady-tachy syndrome is one of the main causes of car accidents. In order to prevent drivers from brady-tachy driving, there is a strong demand for driver monitoring systems. Other than problems in driving attitudes and skills, road accidents are also caused by uncontrollable factors such as medical conditions and drowsiness. These factors can be avoided by having early detection. Therefore, the brady-tachy heart automotive so-called BT-Heartomotive device is developed. This BT-Heartomotive device can detect early signs of drowsiness and health problems by measuring the heart rate of the drivers during driving. The device also could use the data to send an alert to the passengers that they’re in precaution. The device shows a good accuracy in the detection of the heart rate level. The device comprised three main components; wristband, monitor and integrated mobile applications. Heart rate measurement can reveal a lot about the physical conditions of an individual. The BT-Heartomotive device is simple, easy to use and automated.

Sign in / Sign up

Export Citation Format

Share Document