Accuracy of pulse oximetry in detection of oxygen saturation in patients admitted to the intensive care unit of heart surgery: comparison of finger, toe, forehead and earlobe probes

Seifi, Sohila; Khatony, Alireza; Moradi, Gholamreza; Abdi, Alireza; Najafi, Farid

doi:10.1186/s12912-018-0283-1

Cited by 58 publications

(45 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The whole experimental session lasted for approximately 22 min (Figure 1). In addition, SpO 2 was measured by a pulse oximeter (Radical-7 Pulse CO-Oximeter, Masimo, Irvine, CA, USA) placed on the right index finger [55]. HR and RPE were recorded before and after each cognitive task.…”

Section: Methodsmentioning

confidence: 99%

Severe Hypoxia Does Not Offset the Benefits of Exercise on Cognitive Function in Sedentary Young Women

Lei

Kong

Loprinzi

et al. 2019

IJERPH

View full text Add to dashboard Cite

Purpose: To examine the effect of acute moderate-intensity continuous exercise performed under normobaric severe hypoxia on cognition, compared to sea-level normoxia. Methods: Thirty healthy inactive women randomly performed two experimental trials separated by at least three days but at approximately the same time of day. Executive functions were measured during the follicular stage via an interference control task before (rest) and during exercise with 45% peak power output under normobaric normoxia (PIO2 = 150 mmHg, FIO2 = 0.21), and (2) hypoxia (PIO2 = 87 mmHg, FIO2 = 0.12, simulated at an altitude of 4000 m). Reaction time (RT), accuracy rate (AC), heart rate, ratings of perceived exertion, and peripheral oxygen saturation (SpO2) were collected before and during exercise. Results: RT (p < 0.05, η2p = 0.203) decreased during moderate exercise when compared at rest, while a short bout of severe hypoxia improved RT (p < 0.05, η2p = 0.134). Exercise and hypoxia had no effects on AC (p > 0.05). No significant associations were found between the changes of RT and SpO2 under the conditions of normoxia and hypoxia (p > 0.05). Conclusions: At the same phase of the menstrual cycle, a short bout of severe hypoxia simulated at 4000 m altitude caused no impairment at rest. RT during moderate exercise ameliorated in normoxia and severe hypoxia, suggesting that both exercise and short-term severe hypoxia have benefits on cognitive function in sedentary young women.

show abstract

Section: Methodsmentioning

confidence: 99%

Severe Hypoxia Does Not Offset the Benefits of Exercise on Cognitive Function in Sedentary Young Women

Lei

Kong

Loprinzi

et al. 2019

IJERPH

View full text Add to dashboard Cite

show abstract

“…Pulse oximeters are noninvasive medical sensors that monitor heartbeat via photoplethysmography (PPG), a widely used optical technique to detect volume changes in the subcutaneous tissue caused by blood pulses. PPG has been used for a wide range of clinical applications, including measuring blood pressure and cardiac output, [ 1 ] monitoring respiratory rate [ 2,3 ] and depth of anesthesia, [ 4 ] assessing arterial blood oxygenation, [ 5 ] and detecting peripheral vascular disease. [ 6 ] PPG signals are typically acquired by illuminating the skin with light‐emitting diodes (LEDs) and detecting light transmitted or reflected by the tissue with a photodiode.…”

Section: Reference N Opd Pixels Area Sensor [Cm2] Resolution [Ppi] Jdmentioning

confidence: 99%

High‐Accuracy Photoplethysmography Array Using Near‐Infrared Organic Photodiodes with Ultralow Dark Current

Simone

Tordera

Delvitto

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

NIR) spectral region, to estimate the ratio of oxyhemoglobin and deoxyhemoglobin in arterial blood. Transmission pulse oximeters restrict the sensing location to tissues that can be transilluminated, generally fingertips or ear lobes. To overcome this limitation, pulse oximeters should be used in reflective mode, [7] that is, sensing light that slightly penetrates in the tissue and is then reflected. This opens the possibility to monitor pulse rate and blood oxygenation beyond the traditional sensing locations (e.g., fingertip and earlob).Recent developments in the field of organic electronics have led to reflectance oximeters based on organic photodiodes (OPDs). [8][9][10][11] The potential for large-area manufacturing using industrially scalable coating techniques, [12] combined with the wide absorption spectrum and high color selectivity, [13] makes OPDs attractive for this class of optoelectronic sensors. Organic reflectance oximeters on light-weight flexible substrates [14] can easily adapt to complex shapes of the body, thereby potentially providing a versatile alternative to rigid conventional designs. Furthermore, the signal-to-noise ratio (SNR) of flexible oximeters is enhanced by the formation of a conformal sensor-skin interface with lower effective impedance, [15][16][17] which reduces the electronic noise during PPG acquisition. Lochner et al. [8] first combined organic light emitting diodes (OLEDs) with two OPD pixels in an all-organic pulse oximeter. This sensor successfully measured pulse rate and blood oxygenation level within an experimental error of 1% and 2%, respectively. In 2018, Khan et al. [9] presented a reflectance oximeter array composed of four red and four NIR OLEDs, and eight OPDs. Such configuration introduces the functionality of 2D oxygenation mapping capability. The sensor was used to measure oxygen saturation on the forehead with 1.1% error and to create 2D oxygenation maps of adult forearms under under normal and ischemic conditions.Here, we develop an NIR sensitive OPD array of 16 × 16 pixels and demonstrate its potential in reflectance PPG. Each OPD pixel exhibits NIR sensitivity up to ≈ 950 nm together with a low dark current density in the order of 10 −6 mA cm −2 . As the OPD array is operated in reflective mode, a thin semi-transparent top electrode in each pixel is needed not to hinder light that reaches the fingertip and is then reflected. At the same time, the top electrode must form a continuous layer to ensure low series resistance. To fulfill both requirements, we use a 10 nm Ag top electrode. Notably, we use opaque bottom electrodes in combination with the semi-transparent non-patterned top electrode, so that only reflected light is detected by the OPD array.Reflectance oximeters based on organic photodiode (OPD) arrays offer the potential to map blood pulsation and oxygenation via photoplethysmography (PPG) over a large area and beyond the traditional sensing locations. Here, an organic reflectance PPG array based on 16 × 16 OPD pixels is developed. The individual ...

show abstract

“…PPG devices are in common use throughout the healthcare system, providing a quick non-invasive method for obtaining heart rate and blood oxygen saturation (SpO 2 ) in a clinical setting. Most often in these settings transmissive PPG devices are utilised on the patient’s finger, however, sensors designed for the toe, nasal septum, earlobe, and forehead are also utilised where a finger-based sensor is not feasible [4,5]. In recent years, PPG sensors have been integrated into wearable devices designed to be worn on the user’s wrist, such as the Apple Watch and Fitbit devices, for the monitoring of heart rate during exercise and other daily activities [6].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Reflective Photoplethysmography for Detection of Heart Rate, Blood Oxygen Saturation, and Respiration Rate at Various Anatomical Locations

Longmore

Lui

Naik

et al. 2019

Sensors

View full text Add to dashboard Cite

Monitoring of vital signs is critical for patient triage and management. Principal assessments of patient conditions include respiratory rate heart/pulse rate and blood oxygen saturation. However, these assessments are usually carried out with multiple sensors placed in different body locations. The aim of this paper is to identify a single location on the human anatomy whereby a single 1 cm × 1 cm non-invasive sensor could simultaneously measure heart rate (HR), blood oxygen saturation (SpO2), and respiration rate (RR), at rest and while walking. To evaluate the best anatomical location, we analytically compared eight anatomical locations for photoplethysmography (PPG) sensors simultaneously acquired by a single microprocessor at rest and while walking, with a comparison to a commercial pulse oximeter and respiration rate ground truth. Our results show that the forehead produced the most accurate results for HR and SpO2 both at rest and walking, however, it had poor RR results. The finger recorded similar results for HR and SpO2, however, it had more accurate RR results. Overall, we found the finger to be the best location for measurement of all three parameters at rest; however, no site was identified as capable of measuring all parameters while walking.

show abstract

Accuracy of pulse oximetry in detection of oxygen saturation in patients admitted to the intensive care unit of heart surgery: comparison of finger, toe, forehead and earlobe probes

Cited by 58 publications

References 23 publications

Severe Hypoxia Does Not Offset the Benefits of Exercise on Cognitive Function in Sedentary Young Women

Severe Hypoxia Does Not Offset the Benefits of Exercise on Cognitive Function in Sedentary Young Women

High‐Accuracy Photoplethysmography Array Using Near‐Infrared Organic Photodiodes with Ultralow Dark Current

A Comparison of Reflective Photoplethysmography for Detection of Heart Rate, Blood Oxygen Saturation, and Respiration Rate at Various Anatomical Locations

Contact Info

Product

Resources

About