Detection Of Oxygen Saturation Research Articles

Comparison of Blood Oxygen Saturation Detection Methods in Patients with Hyperleukocytic Acute Leukemia

To investigate which indicator is more advantageous when using arterial oxygen saturation (SaO2) and fingertip pulse oxygen saturation (SpO2) for blood oxygen detection in patients with hyperleukocytic acute leukemia (HAL). In this prospective research, the difference between SaO2 and SpO2 of 18 HAL patients (observation group) and 14 patients (control group), as well as the relationship between the difference and white blood cell (WBC) counts were analyzed. SaO2 was lower than SpO2 in the observation group (P <0.05), and SpO2-SaO2 difference was positively correlated with WBC counts (r =0.47). However, there was no statistical difference between SaO2 and SpO2 in the control group. SaO2 and PO2 showed a downward trend with the prolongation of detection time after arterial blood was collected in the observation group, but there was no statistical difference. There was no downward trend of SaO2 and PO2 in the control group. HAL patients have a phenomenon where SaO2 is lower than SpO2, that is pseudohypoxemia, and this phenomenon may be caused by excessive consumption of oxygen by the leukemia cells in vitro SpO2 can be monitored bedside in real time and is non-invasive, it is a better way to detect the blood oxygen status of HAL patients.

Design and Analysis of a Through-Body Signal Transmission System Based on Human Oxygen Saturation Detection

Design and Analysis of a Through-Body Signal Transmission System Based on Human Oxygen Saturation Detection

Design and realization of medical remote monitoring system based on computer vision

Abstract Telemedicine systems, with the development of network technology, have gradually become a new trend in the medical field, which can transmit medical information over a long distance so that experts and doctors can diagnose the patient’s condition and provide emergency assistance over a long distance. This paper puts forward the overall design of the remote monitoring system and its construction objectives, and the construction of the monitoring system to demonstrate in detail the objectives, based on the C/S architecture and the TCP protocol cluster is more suitable for the system design program. Machine vision is utilized to simulate the visual function of the human eye, and the parameters are optimized using the excellent likelihood estimation method to process and extract the monitoring image. The blood oxygen saturation, ECG signal, and body temperature information module are designed to capture physiological information from the user. After testing, this designed remote monitoring system successfully realizes the remote monitoring function of the patient’s oxygen saturation, ECG signal, and body temperature. Meanwhile, an error of ±0.1°C was realized in body temperature detection, and the maximum error of blood oxygen saturation detection was 3%, which all meet the relevant standards. With a simple structure and low price, this system proposes a new method for designing a telemedicine monitoring system.

A non-contact oxygen saturation detection method based on dynamic spectrum

Blood oxygen saturation (SpO2) is an important monitoring indicator for many respiratory diseases. Non-contact oximetry offers outstanding advantages in both coronavirus pandemic monitoring and sleep monitoring, but at the same time poses both challenges regarding technology and environment. Therefore, we propose a method for non-contact SpO2 measurement based on the principle of DS (dynamic spectrum) in this paper. A multispectral camera with 24 wavelengths (range in 660 nm-950 nm) is used to capture video of the people's cheek region, and then the two-dimensional images are converted into a one-dimensional temporal PPG signal. After pre-processing the PPG signal, the 24 wavelengths DS values are extracted. The optimal wavelength combination is obtained by wavelength screening using the one-by-one elimination method, and a PLS (partial least squares) model is established using the SpO2 values measured simultaneously by pulse oximetry as the modeled true values. The facial videos of eight healthy subjects were collected, and a total of 140 valid samples were obtained. By analyzing the modeling results, the regression coefficient (R) and root mean square error (RMSE) of the modeled set were 0.6366 and 0.9906, respectively. This method can significantly respond to the variation of SpO2, and the prediction results are approaching to the prediction accuracy (±2%) of most pulse oximeters in the market. Using DS theory in this method eliminates in principle the interference of static tissue, individual differences, and environment. It fully meets the strong demand for non-contact oximetry and provides a new measurement idea.

Pengenalan Oximeter sebagai Deteksi Kejenuhan Oksigen dalam Darah Kepada Satgas Covid-19 Kalurahan Serut, Gunung Kidul

Since the emergence of Covid-19 in Indonesia in early 2020, it has spread throughout Indonesia, including rural areas. The Serut District, which is a border area, namely the Klaten district with Gunung Kidul, cannot be separated from the spread of Covid-19. The condition of the people of Serut Village, which is a genuine rural community, causes a lack of understanding of the dangers of the virus. The confusion of news in the mass media and social media has made the understanding of Covid-19 blurry. One of them is a non-invasive oxygen saturation detection system technology using an oximeter to monitor blood health conditions. This is very important, especially for patients who have confirmed Covid-19 and are self-isolating at home. In this service, the implementing team collaborates with the Serut Village government and the ranks of the Covid-19 task force to mitigate Covid-19 in the Serut Village area. The programs that will be implemented include providing materials and demonstrations for detecting oxygen saturation in the blood using an oximeter to the Covid-19 task force. The provision of materials and demonstrations will be continued with data sampling and analysis to the people of Serut Village. This program aims to introduce the system of measuring oxygen saturation in the blood and how to measure it independently. This is very important considering that oxygen saturation in the blood is one of the parameters in Covid-19 patients. Keywords: Oximeter; Blood Oxygen Saturation ;Satgas Covid-19; Kalurahan Serut

The Association between Postoperative Cognitive Dysfunction and Cerebral Oximetry during Geriatric Orthopedic Surgery: A Randomized Controlled Study.

Background Postoperative cognitive dysfunction (POCD) refers to disorders affecting orientation, attention, perception, consciousness, and judgment that develop after geriatric orthopedic surgery. Cerebral blood oxygen saturation detection is a way to diagnose cerebral oxygen supply during operation. At present, more and more applications are used for early diagnosis of postoperative cognitive function. Therefore, the present study is to analyze the relationship between postoperative cognitive dysfunction and cerebral blood oxygen saturation in elderly orthopedic patients. Methods This study enrolled 90 elderly patients undergoing orthopedic surgery in our hospital. According to the postoperative cognitive dysfunction, they were divided into POCD group (N = 45) and no-POCD (N = 45) group. The cognitive and psychological function and cerebral blood oxygen saturation were analyzed before and 3 months after the operation. Finally, the indicators of cognitive psychological function and the indicators of cerebral blood oxygen saturation are correlated and analyzed. Results Compared with the normal group, patients with cognitive dysfunction at 3 months after surgery time below preoperative rScO2, time below a 10% decrease from preoperative rScO2, CDL preoperative, minimum rScO2 value, and maximum rScO2 value have significant changes. The results of the correlation analysis found that there is also a significant correlation between the postoperative cognitive and psychological function of the patient and the cerebral blood oxygen saturation at 3 weeks after the operation. Conclusion In elderly orthopedic patients, there is a significant relationship between cerebral blood oxygen saturation detection and cognitive function 3 months after surgery.

Problems with evaluating readings of pulse oximeters used at home during the ongoing COVID-19 pandemic

The author presents the problems related to pulse oximetry, taking into account both the current state-of-the-art as well as her own long-standing experience in this field. The COVID-19 pandemic continues and has raised interest in home application of pulse oximeters due to their potential benefit, which may be warning of a drop in blood oxygenation due to lower respiratory capacity. However, it should be emphasized that these devices have limitations, both of a physiological and technical nature, and some problems related to the reliability and scope of the measurements still remain unresolved. Phenomena which limit processing reliability of the quantity to be sensed, i.e., the oxygen saturation SaO2%, are presented. Specific groups of affecting factors are distinguished in an approach of their contribution to the measurement uncertainty components. Full Text: PDF ReferencesJ.W. Severinghaus, "Crediting six discoverers of oxygen", Adv. Exp. Med. Biol. 812 (2014). CrossRef F.A. Duck, "Physical properties of tissue: a comprehensive reference book" (San Diego, Academia Press 1990). CrossRef J.G. Webster, "Design of pulse oximeters" (Bristol, IOP Publishing Ltd 1997). CrossRef A.A. Alian and K.H Shelley, "Photoplethysmography", Anesthesiology 28, 4 (2014). CrossRef N. Moukaddam and A. Shah, "Psychiatrists beware! The impact of COVID-19 and pandemics on mental health", Psychiatric Times 37, 3 (2020). CrossRef S.S. Morse, Proc Nat. Acad Sci 104, 18 (2007). CrossRef W.A. Schrading, B. McCafferty, J. Grove, and D.B. Page, "Portable, consumer‐grade pulse oximeters are accurate for home and medical use: Implications for use in the COVID‐19 pandemic and other resource‐limited environments", JACP Open, 1 (2020). CrossRef K.E.J. Philip, B. Bennet, S. Fuller, et al., "Working accuracy of pulse oximetry in COVID-19 patients stepping down from intensive care: a clinical evaluation ", BMJ Open Resp. Res. 7 (2020). CrossRef S. Seifi, A. Khatony, G. Moradi, A. Abdi, and F. Najafi, "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", BMC Nursing 17, 15 (2018). CrossRef A. Cysewska-Sobusiak, "A modern approach to the determination of expanded uncertainty in noninvasive blood oximetry", Measurement 25 (1999). CrossRef A. Cysewska-Sobusiak, "The importance of the combined teaching and research work in the education of biomedical engineering", Biocybernetics and Biomedical Engineering 22, 4 (2002). CrossRef A. Cysewska-Sobusiak, "Noninvasive optoelectronic monitoring of the living tissues vitality", 3rd Int. Workshop on Robot Motion and Control, Nov. 2002 (2002). CrossRef A. Cysewska-Sobusiak, "Examples of acquisition and application of biooptical signals", Phot. Lett. Poland 11, 2 (2019). CrossRef

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

BackgroundHeart surgery patients are more at risk of poor peripheral perfusion, and peripheral capillary oxygen saturation (SpO2) measurement is regular care for continuous analysis of blood oxygen saturation in these patients. With regard to controversial studies on accuracy of the current pulse oximetry probes and lack of data related to patients undergoing heart surgery, the present study was conducted to determine accuracy of pulse oximetry probes of finger, toe, forehead and earlobe in detection of oxygen saturation in patients admitted to intensive care units for coronary artery bypass surgery.MethodsIn this clinical trial, 67 patients were recruited based on convenience sampling method among those admitted to intensive care units for coronary artery bypass surgery. The SpO2 value was measured using finger, toe, forehead and earlobe probes and then compared with the standard value of arterial oxygen saturation (SaO2). Data were entered into STATA-11 software and analyzed using descriptive, inferential and Bland-Altman statistical analyses.ResultsHighest and lowest correlational mean values of SpO2 and SaO2 were related to finger and earlobe probes, respectively. The highest and lowest agreement of SpO2 and SaO2 were related to forehead and earlobe probes.ConclusionThe SpO2 of earlobe probes due to lesser mean difference, more limited confidence level and higher agreement ration with SaO2 resulted by arterial blood gas (ABG) analysis had higher accuracy. Thus, it is suggested to use earlobe probes in patients admitted to the intensive care unit for coronary artery bypass surgery.Trial registrationRegistration of this trial protocol has been approved in Iranian Registry of Clinical Trials at 2018–03-19 with reference IRCT20100913004736N22. “Retrospectively registered.”

New method of extracting information of arterial oxygen saturation based on ∑|𝚫|.

Noninvasive detection of oxygen saturation with near-infrared spectroscopy has been widely used in clinics. In order to further enhance its detection precision and reliability, this paper proposes a method of time domain absolute difference summation (∑|Δ|) based on a dynamic spectrum. In this method, the ratio of absolute differences between intervals of two differential sampling points at the same moment on logarithm photoplethysmography signals of red and infrared light was obtained in turn, and then they obtained a ratio sequence which was screened with a statistical method. Finally, use the summation of the screened ratio sequence as the oxygen saturation coefficient Q. We collected 120 reference samples of SpO2 and then compared the result of two methods, which are ∑|Δ| and peak-peak. Average root-mean-square errors of the two methods were 3.02% and 6.80%, respectively, in the 20 cases which were selected randomly. In addition, the average variance of Q of the 10 samples, which were obtained by the new method, reduced to 22.77% of that obtained by the peak-peak method. Comparing with the commercial product, the new method makes the results more accurate. Theoretical and experimental analysis indicates that the application of the ∑|Δ| method could enhance the precision and reliability of oxygen saturation detection in real time.

The detection of oxygen saturation in the healthy newborn

The birth of a physiological newborn occurs in the daily clinical care, but in the minds of every parent, in a comfortable environment where the adoption of behaviors are expected to respect the natural childbirth. It is preferred to minimize the interference of clinical practices, which may in any way restrict the free expression of the triad parents/newborn. It is true that in a hospital setting, at the same time, it is required to guarantee the safety with respect to possible, although rare, adverse events – whether related to the care practices or health condition of the infant or the mother.

Non-contact detection of oxygen saturation based on visible light imaging device using ambient light

A method that remotely measures blood oxygen saturation through two cameras under regular lighting is proposed and experimentally demonstrated. Two narrow-band filters with their visible wavelength of 660nm and 520nm are mounted to two cameras respectively, which are then used to capture two photoplethysmographic (PPG) from the subject simultaneously. The data gathered from this system, including both blood oxygen saturation and heart rate, is compared to the output of a traditional figure blood volume pulse (BVP) senor that was employed on the subject at the same time. Result of the comparison showed that the data from the new, non-contact system is consistent and comparable with the BVP senor. Compared to other camera-based measuring method, which requires additional close-up lighting, this new method is achievable under regular lighting condition, therefore more stable and easier to implement. This is the first demonstration of an accurate video-based method for non-contact oxygen saturation measurements by using ambient light with their respective visible wavelength of 660nm and 520nm which is free from interference of the light in other bands.