Beat to Beat: A Measured Look at the History of Pulse Oximetry

Meter, Antoinette Van; Williams, Uduak Ursula; Zavala, Acsa M.; Kee, Joshua; Rebello, Elizabeth; Tsai, January; Ifeanyi, Ifeyinwa; Ruíz, Jordi; Lim, Jeffery; Owusu-Agyemang, Pascal

doi:10.1016/j.janh.2016.12.003

Cited by 37 publications

(51 citation statements)

References 10 publications

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“…Although we carry out a standardization of personnel in the use of the pulse oximeter, we cannot totally exclude possibilities of error in the measurement of SpO2 such as incorrect positioning of the probe or insu cient perfusion. 4. In this study we did not set out to compare the SpO2 results between the group that met the inclusion criteria with the excluded group; However, this comparison could provide additional information.…”

Section: Discussionmentioning

confidence: 99%

Pulse oximetry curves in healthy children living at moderate altitude: a cross-sectional study from the Ecuadorian Andes

Mayorga

Andrade

Riofrío

et al. 2020

Preprint

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Background In populations above 3,000 meters above sea level (m.a.s.l.) normal values of oxygen saturation (SpO2) above 90% have been reported. Few studies have been conducted in cities of moderate altitude (between 2,500 and 3,000 m a.s.l). We set out to describe the range of SpO2 values measured with a pulse oximeter in healthy children between 1 month and 12 years of age living in an Ecuadorian Andean city. Methods A cross-sectional study was carried out in Quito, Ecuador, located at 2,810 m a.s.l. SpO2 measurement in healthy children of ages ranging from 1 month to 12 years of age residents in the city were recorded by pulse oximetry. Age and gender were recorded, and median and 2.5 th and 5 th percentile were drawn. Non parametric tests were used to compare differences in SpO2 values by age and gender. Results 1,378 healthy children were included for the study, 719 (52.2%) males. The median SpO2 for the entire population was 94.5%. No differences were observed between SpO2 median values by age and gender. The 2.5 th percentile for global SpO2 measurements was 90%, in children under 5 years of age was 91% and it was 90% in children older than 7. Conclusions Our results provide SpO2 values for healthy children from 1 to 12 years old residents in Quito, a city of moderate altitude. The SpO2 percentile curve could contribute as a healthy range for the clinical evaluation of children residing at this altitude.

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Section: Discussionmentioning

confidence: 99%

Pulse oximetry curves in healthy children living at moderate altitude: a cross-sectional study from the Ecuadorian Andes

Mayorga

Andrade

Riofrío

et al. 2020

Preprint

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“…Respiratory rate monitoring in patients requiring continuous monitoring is typically performed via thoracic bioimpedance from ECG leads or capnography [14]. Blood pressure monitoring in clinical spaces is typically performed via an automated oscillometric cuff [15], while oxygen saturation monitoring is performed using a two-wavelength pulse oximeter, either as a standalone device or integrated into a vital signs monitor [16]. Innovation with these devices over the past decades has been incremental rather than revolutionary.…”

Section: Rationalementioning

confidence: 99%

“…Despite advances in automation or miniaturization of parts, noninvasive blood pressure monitoring continues to rely on the same principle of collapse and reinflation of an artery then measurement by auscultation [17] or oscillemetry. Pulse oximetry, while now present in most smartphones [18] continues to rely on the same principle of the change in the absorbance of visible and infrared light of hemoglobin at different oxygen saturations [16]. Recent incremental innovations to other vital signs monitoring include new algorithms to better detect heart rate and respiratory rate [14] or the combination of multiple measurement devices into a single, more portable unit [19].…”

Section: Rationalementioning

confidence: 99%

“…Finally, it should be noted that the absence of validation does not necessarily imply the absence of valid clinical application. For example, the American Society of Anaesthesiologists adopted the use of pulse oximetry as a standard in 1986 despite the absence of level 1 evidence of its effectiveness [16] at the time. Nonetheless this review will seek to provide further clarity on potential modalities that carry potential to transform patient monitoring.…”

Section: Limitationsmentioning

confidence: 99%

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Novel wearable and contactless monitoring devices to identify deteriorating patients in the clinical setting: a systematic review protocol

et al. 2020

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Background: With technological advances, there has been increasing interest in developing contactless and/or non-invasive wearable technologies that continuously monitor vital signs in the clinical setting, and in particular in the deteriorating patient. These devices as of yet have not been well validated in the clinical setting in the clinical ranges observed in a critically unwell patient. We will perform a systematic review of all novel wearable and contactless devices in the clinical setting with focus on degree of novelty and the range of vital signs captured. Methods: Ovid MEDLINE including Epub Ahead of Print and In-Process & Other Non-Indexed Citations, Ovid Embase, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials (CENTRAL) Health Technology Assessment (HTA) database (Ovid), CINAHL with Full Text, searches of the grey literature, cited references of eligible studies through Web of Science, and reference lists of eligible studies will be searched. Outcomes of interest will include the quality of studies in relation to reporting guidelines, limitations of non-invasive technology, and application in different clinical populations. We will perform a qualitative assessment of the novelty of the device and discuss its validation in deteriorating patients. Discussion: While novel monitoring devices are often proposed as a solution to problems with infection, discomfort, and frequency of monitoring in the clinical setting it has not yet been established which devices have been validated in clinical settings in the pathological ranges of vital signs that reflect patient deterioration. It is equally unclear what additional value these devices might provide. This systematic review will synthesize published data regarding devices that have been tested and validated in patients AND in a clinical setting AND in reference ranges that reflect severe illness. Systematic review registration: PROSPERO CRD42019130091

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“…After that, the questions we were asking about the proper oxygenation of our patients suddenly got upgraded into more detailed and outcome-related inquiries (8). Today, pulse oximetry is regarded as one of the most important advances in patient monitoring (9). We would not be doing such a great job in Anesthesiology if we were still relying on cyanosis as a sign of respiratory compromise!…”

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confidence: 99%