scholarly journals Design And Evaluation of a New Auditory Display for the Pulse Oximeter

2019 ◽  
Author(s):  
Estrella Paterson ◽  
Penelope Sanderson ◽  
Neil Paterson ◽  
Robert Loeb
Keyword(s):  
Heart Rate ◽  
Pulse Oximeter ◽  
Acoustic Properties ◽  
High Fidelity ◽  
Auditory Display ◽  
Laboratory Studies ◽  
Auditory Displays ◽  
Patient Deterioration ◽  
Pulse Oximeters ◽  
Treat Patient

During surgery the pulse oximeter device provides information about a patient’s oxygen saturation (SpO2) and heart rate via visual and auditory displays. An audible tone is emitted after every detected pulse (indicating heart rate), and the pitch of the tone is mapped to SpO2. However, clinicians cannot reliably judge SpO2 using only the current auditory display. In a series of three studies, we compared auditory displays based on current pulse oximeters with displays designed to provide more information about SpO2 levels using additional acoustic properties. Results from the first two laboratory studies show that the new auditory displays support better identification of specified ranges of SpO2, and better detection of when saturation transitions a critically relevant threshold. The analysis of a third study in a high-fidelity simulator is currently under way. An auditory display that provides more information about SpO2 levels and when SpO2 changes from one range to another may be useful for clinicians when they are engaged in other visually demanding tasks but have to detect and treat patient deterioration, often in time-pressured and stressful situations.

scholarly journals How well are heart rates measured by pulse oximeters and electronic sphygmomanometers? Practice-based evidence from an observational study of acutely ill medical patients during hospital admission

2019 ◽  
Vol 18 (3) ◽  
pp. 144-147
Author(s):  
Mary Rimbi ◽  
◽  
Immaculate Nakitende ◽  
Teopista Namujwiga ◽  
John Kellett ◽  
...  
Keyword(s):  
Heart Rate ◽  
Observational Study ◽  
Hospital Admission ◽  
Pulse Oximeter ◽  
Medical Patients ◽  
Limits Of Agreement ◽  
Heart Rates ◽  
Electrocardiogram Ecg ◽  
Pulse Oximeters

Background: heart rates generated by pulse oximeters and electronic sphygmomanometers in acutely ill patients may not be the same as those recorded by ECG Methods: heart rates recorded by an oximeter and an electronic sphygmomanometer were compared with electrocardiogram (ECG) heart rates measured on acutely ill medical patients. Results: 1010 ECGs were performed on 217 patients while they were in the hospital. The bias between the oximeter and the ECG measured heart rate was -1.37 beats per minute (limits of agreement -22.6 to 19.9 beats per minute), and the bias between the sphygmomanometer and the ECG measured heart rate was -0.14 beats per minute (limits of agreement -22.2 to 21.9 beats per minute). Both devices failed to identify more than half the ECG recordings that awarded 3 NEWS points for heart rate. Conclusion: Heart rates of acutely ill patients are not reliably measured by pulse oximeter or electronic sphygmomanometers.

scholarly journals Accuracy of pulse oximeters in estimating heart rate at rest and during exercise.

1991 ◽  
Vol 25 (3) ◽  
pp. 162-164 ◽  
Author(s):  
Y Iyriboz ◽  
S Powers ◽  
J Morrow ◽  
D Ayers ◽  
G Landry
Keyword(s):  
Heart Rate ◽  
Pulse Oximeters

IoT Based Pulse Oximeter

2021 ◽  
Vol 9 (8) ◽  
pp. 2946-2951
Author(s):  
G Sidhartha
Keyword(s):  
Heart Rate ◽  
Signal Processing ◽  
Oxygen Saturation ◽  
Data Transmission ◽  
Pulse Oximeter ◽  
Mobile Application ◽  
Preventive Measures ◽  
Vital Signs ◽  
Home Treatment ◽  
Portable Devices

Abstract: In recent times, we have realized the importance of vital signs such as Oxygen saturation and heart rate i.e beats per minute (BPM) due to the covid-19 situation worldwide. SpO2 and BPM are being used as preliminary indicators for testing a person’s health, the drop in the oxygen saturation is perceived as one of the symptoms of a person suffering from coronavirus. Oximeters are portable devices that are used to measure the SpO2 and BPM of a person. Timely measurements of oxygen saturation can aid in taking preventive measures. This paper discusses the construction and development of an IoT-based pulse oximeter that is capable of transmitting the reading obtained to any remote location wirelessly. The proposed system uses Arduino as the microcontroller which is used for signal processing and Esp-01 as the Wifi platform to enable remote data transmission. The data is communicated remotely through Blynk mobile application. This project is aimed at reducing the manual effort undergone in regularly updating the oxygen saturation to the doctor, in the case of a person undergoing home treatment. Though an oximeter is not a screening te st, it is a primary indicator of a person’s health. Keywords: Heart rate, SpO2, IoT, Arduino, BLYNK server, Red, IR.

Heart rate assessment using NeoTapAdvancedSupport: a simulation study

2018 ◽  
pp. fetalneonatal-2018-315408 ◽  
Author(s):  
Marco Binotti ◽  
Francesco Cavallin ◽  
Pier Luigi Ingrassia ◽  
Nicolas J Pejovic ◽  
Alice Monzani ◽  
...  
Keyword(s):  
Heart Rate ◽  
Simulation Study ◽  
Mobile Application ◽  
Good Accuracy ◽  
Term Infant ◽  
High Fidelity ◽  
Altman Plot ◽  
External Observer ◽  
Bland Altman Plot ◽  
Limited Availability

BackgroundNeoTapAdvancedSupport (NeoTapAS) is a mobile application, based on a screen tapping method that calculates the heart rate (HR). We aimed to evaluate the accuracy of NeoTapAS in reliably determining HR from auscultation in a high-fidelity simulated newborn resuscitation scenario.MethodsPaediatric residents assessed HR by auscultation plus NeoTapAS in an asphyxiated term infant scenario and orally communicated the estimated HR. An external observer simultaneously documented the actual HR set in the manikin and the communicated HR.ResultsOne hundred and sixty HR measurements were recorded. The agreement between communicated and set HR was good (Cohen’s kappa 0.80, 95% CI 0.72 to 0.87; Bangdiwala’s weighted agreement strength statistic 0.93). Bland-Altman plot showed a mean difference between communicated and set HR values of 1 beats per minute (bpm) (95% agreement limits −9 to 11 bpm).ConclusionNeoTapAS showed a good accuracy in estimating HR and it could be an important resource in settings with limited availability of ECG monitor.

scholarly journals Exploring Design Constructs In Sound Design With A Focus On Perceived Affordance

2019 ◽  
Vol 63 (1) ◽  
pp. 1199-1203
Author(s):  
Myounghoon Jeon
Keyword(s):  
Design Theory ◽  
Theory And Practice ◽  
Auditory Display ◽  
Sound Design ◽  
Visual Displays ◽  
Auditory Displays ◽  
Design Theories ◽  
Future Work

While design theories in visual displays have been well developed and further refined, relatively little research has been conducted on design theories and models in auditory displays. The existing discussions mainly account for functional mappings between sounds and referents, but these do not fully address design aspects of auditory displays. To bridge the gap, the present proposal focuses on design affordances in sound design among many design constructs. To this end, the definition and components of design affordances are briefly explored, followed by the auditory display examples of those components to gauge whether sound can deliver perceived affordances in interactive products. Finally, other design constructs, such as feedback and signifier, are discussed together with future work. This exploratory proposal is expected to contribute to elaborating sound design theory and practice.

Development of pulse oximeter for heart rate monitoring

2019 ◽  
Author(s):  
S. Padmini ◽  
M. D. Shafeulwara ◽  
K. Subha Sharmini ◽  
V. Mridula ◽  
Ishan Kar ◽  
...  
Keyword(s):  
Heart Rate ◽  
Pulse Oximeter ◽  
Heart Rate Monitoring

Engineering geology of nearshore areas off Richards Island, N.W.T.: a comparison of stable and actively eroding coastlines

1991 ◽  
Vol 28 (2) ◽  
pp. 179-188 ◽  
Author(s):  
P J Kurfurst ◽  
S. R. Dallimore
Keyword(s):  
Engineering Geology ◽  
Acoustic Properties ◽  
Coastal Processes ◽  
Considerable Variability ◽  
Laboratory Studies ◽  
Coastal Site ◽  
Spatial Sense ◽  
Main Factors ◽  
Landfast Sea Ice ◽  
Ice Content

Nearshore areas off northern Richards Island can be expected to show considerable variability in lithology, strengths, and geothermal setting both in a temporal and a spatial sense. Drilling and laboratory studies carried out along onshore–offshore transects at a stable coastal site and an actively eroding coastal site have identified six major stratigraphic units of Holocene and pre-Holocene (Wisconsinan) age. The main factors controlling the geotechnical properties of these sediments and their distribution are the occurrence of shallow permafrost beneath areas seasonally covered by landfast sea ice, rapid degradation of permafrost in areas farther offshore, ice content of thawing pre-Holocene sediments, and variability in coastal processes. Key words: nearshore deposits, engineering geology, permafrost, physical properties, acoustic properties.

Effect of opaque wraps for pulse oximeter sensors: randomised cross-over trial

2020 ◽  
Vol 106 (1) ◽  
pp. 57-61
Author(s):  
Prakash Kannan Loganathan ◽  
Joyce E O'Shea ◽  
Chidambara Harikumar ◽  
John C Brigham ◽  
Yacov Rabi ◽  
...  
Keyword(s):  
Pulse Oximeter ◽  
Primary Outcome ◽  
Mean Difference ◽  
Lower Percentage ◽  
Ambient Light ◽  
Valid Data ◽  
Registration Number ◽  
Data Points ◽  
Secondary Outcomes ◽  
Pulse Oximeters

BackgroundEvidence is lacking as to whether ambient light or phototherapy light could interfere with pulse oximeter performance.MethodsIn this randomised cross-over trial, we recruited neonates of gestation >24 weeks. Consented infants were randomly assigned to either pulse oximeter sensor with opaque wrap or without opaque wrap. Nellcor and Masimo sensors were applied simultaneously to different feet for 10 min of recording. Infants were crossed over to the other intervention for a further 10 min, totalling 20 min recording per infant. Primary outcome was faster acquisition of data with shielding of pulse oximeter sensor as compared with not shielding.ResultsA total of 96 babies were recruited. There was no difference in primary outcome of time taken to display valid data between the two groups (opaque wrap: 12.73±3.1 s vs no opaque wrap: 13.16±3.3 s, p=0.27). There was no difference in any of the secondary outcomes (percentage of valid data points, percentage of time saturation below target, and so on) between the two groups in both pulse oximeters. Masimo sensor readings displayed a higher mean oxygen saturation (mean difference of 2.85, p=0.001) and lower percentage of time saturation below 94% (mean difference of −27.8, p=0.001) than Nellcor in both groups. There was no difference in any of the outcomes in babies receiving phototherapy (n=21).ConclusionIn this study, shielding the pulse oximeter sensor from ambient light or phototherapy light did not yield faster data acquisition or better data quality.Trial registration numberISRCTN10302534

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