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Pulse oximeter

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https://www.readbyqxmd.com/read/29134264/oxygen-desaturation-in-daily-life-and-during-a-laboratory-based-protocol-of-activities-of-daily-living-in-copd-is-there-relationship
#1
Thaís Sant'Anna, Leila Donária, Nidia A Hernandes, Karina C Furlanetto, Décio S Barbosa, Rik Gosselink, Fabio Pitta
PURPOSE: To analyze the relationship between oxygen desaturation episodes during a laboratory-based ADL protocol and in real-life routine in patients with stable chronic obstructive pulmonary disease (COPD). METHODS: Twenty patients with stable COPD (12 men, 70 ± 7 years, FEV1% 54 ± 15 predicted) with no indication for long-term oxygen therapy (LTOT) were submitted to assessments including ADL performance by the Londrina ADL Protocol (LAP) and level of physical activity in daily life, both while submitted to simultaneous activity and pulse oximeter monitoring...
November 13, 2017: Lung
https://www.readbyqxmd.com/read/29124562/video-based-heart-rate-monitoring-across-a-range-of-skin-pigmentations-during-an-acute-hypoxic-challenge
#2
Paul S Addison, Dominique Jacquel, David M H Foo, Ulf R Borg
The robust monitoring of heart rate from the video-photoplethysmogram (video-PPG) during challenging conditions requires new analysis techniques. The work reported here extends current research in this area by applying a motion tolerant algorithm to extract high quality video-PPGs from a cohort of subjects undergoing marked heart rate changes during a hypoxic challenge, and exhibiting a full range of skin pigmentation types. High uptimes in reported video-based heart rate (HRvid) were targeted, while retaining high accuracy in the results...
November 9, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29109315/assessment-of-alteration-in-capnometry-monitoring-during-intravenous-sedation-with-midazolam-for-oral-surgical-procedures
#3
Kavitha G, Pallavi K Kakade, Madhavi Singh, Mahesh Ahire, Melvin Augustine, Kinjal D Jain
INTRODUCTION: Capnography is routinely used for monitoring of patients subjected to sedation for different surgical procedures. There is still paucity of data highlighting the capnographic assessment of patients on midazolam sedation undergoing oral surgical procedures. Hence, we planned the present study to assess the alterations occurring in the end-tidal carbon dioxide (ETCO2) values monitored during intravenous (IV) sedation with midazolam during various oral surgical procedures. MATERIALS AND METHODS: The present study included assessment of alteration in ETCO2 values occurring during oral surgical procedure...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29102826/a-motion-tolerant-approach-for-monitoring-spo2-and-heart-rate-using-photoplethysmography-signal-with-dual-frame-length-processing-and-multi-classifier-fusion
#4
Feiyi Fan, Yuepeng Yan, Yongzhong Tang, Hao Zhang
Monitoring pulse oxygen saturation (SpO2) and heart rate (HR) using photoplethysmography (PPG) signal contaminated by a motion artifact (MA) remains a difficult problem, especially when the oximeter is not equipped with a 3-axis accelerometer for adaptive noise cancellation. In this paper, we report a pioneering investigation on the impact of altering the frame length of Molgedey and Schuster independent component analysis (ICAMS) on performance, design a multi-classifier fusion strategy for selecting the PPG correlated signal component, and propose a novel approach to extract SpO2 and HR readings from PPG signal contaminated by strong MA interference...
November 2, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29099872/a-pilot-randomized-controlled-trial-of-ekg-for-neonatal-resuscitation
#5
Anup Katheria, Kathy Arnell, Melissa Brown, Kasim Hassen, Mauricio Maldonado, Wade Rich, Neil Finer
BACKGROUND: The seventh edition of the American Academy of Pediatrics Neonatal Resuscitation Program recommends the use of a cardiac monitor in infants that need resuscitation. Previous trials have shown that EKG heart rate is available before pulse rate from a pulse oximeter. To date no trial has looked at how the availability of electrocardiogram (EKG) affects clinical interventions in the delivery room. OBJECTIVE: To determine whether the availability of an EKG heart rate value and tracing to the clinical team has an effect on physiologic measures and related interventions during the stabilization of preterm infants...
2017: PloS One
https://www.readbyqxmd.com/read/29067213/assessment-of-clinical-application-of-pulse-oximetry-probes-in-llamas-and-alpacas
#6
Tamara L Grubb, David E Anderson
The placement and accuracy of pulse oximeter probes can vary markedly among species. For our study, we aimed to assess the accuracy of pulse oximetry and to determine the most clinically useful sites for probe placement in llamas and alpacas. The objectives included an analysis of pulse oximetry probes for accurate assessment of llamas and alpacas and to determine the best placement of the probes to achieve accurate readings. For study 1, saturation of haemoglobin with oxygen was measured in 184 arterial blood gas samples (SaO2) using a co-oximeter and compared to saturation of haemoglobin with oxygen simultaneously measured using a pulse oximeter (SpO2)...
August 2017: Veterinary Medicine and Science
https://www.readbyqxmd.com/read/29060715/detecting-obstructive-sleep-apnea-in-children-by-self-affine-visualization-of-oximetry
#7
Ainara Garde, Parastoo Dekhordi, Christian L Petersen, J Mark Ansermino, Guy A Dumont
Obstructive sleep apnea (OSA), characterized by cessations of breathing during sleep due to upper airway collapse, can affect the healthy growth and development of children. The gold standard for OSA diagnosis, polysomnography(PSG), is expensive and resource intensive, resulting in long waiting lists to perform a PSG. Previously, we investigated the time-frequency analysis of blood oxygen saturation (SpO2) to screen for OSA. We used overnight pulse oximetry from 146 children, collected using a smartphone-based pulse oximeter (Phone Oximeter), simultaneously with standard PSG...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060602/development-of-a-smartphone-based-pulse-oximeter-with-adaptive-snr-power-balancing
#8
Tom Phelps, Haowei Jiang, Drew A Hall
Millions worldwide suffer from diseases that exhibit early warnings signs that can be detected by standard clinical-grade diagnostic tools. Unfortunately, such tools are often prohibitively expensive to the developing world leading to inadequate healthcare and high mortality rates. To address this problem, a smartphone-based pulse oximeter is presented that interfaces with the phone through the audio jack, enabling point-of-care measurements of heart rate (HR) and oxygen saturation (SpO2). The device is designed to utilize existing phone resources (e...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060248/development-of-an-intraluminal-intestinal-photoplethysmography-sensor
#9
Zaibaa Patel, Mohamed A Thaha, Panayiotis A Kyriacou
Intestinal ischemia is a serious medical condition and can lead to life threatening sepsis. Currently, there are no reliable techniques available for directly monitoring intestinal viability for prolonged periods of time, and intraoperatively, the majority of the surgeons still rely on subjective methods, such as visual inspection to assess viability of the intestine. The development of an intraluminal optical sensor for monitoring intestinal viability is being proposed. The sensor will continuously monitor changes in blood volume and oxygen saturation...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059977/running-wavelet-archetype-aids-the-determination-of-heart-rate-from-the-video-photoplethysmogram-during-motion
#10
Paul S Addison, David M H Foo, Dominique Jacquel
The extraction of heart rate from a video-based biosignal during motion using a novel wavelet-based ensemble averaging method is described. Running Wavelet Archetyping (RWA) allows for the enhanced extraction of pulse information from the time-frequency representation, from which a video-based heart rate (HRvid) can be derived. This compares favorably to a reference heart rate derived from a pulse oximeter.
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059975/a-novel-hardware-implementation-for-detecting-respiration-rate-using-photoplethysmography
#11
Joseph Prinable, Peter Jones, Cindy Thamrin, Alistair McEwan
Asthma is a serious public health problem. Continuous monitoring of breathing may offer an alternative way to assess disease status. In this paper we present a novel hardware implementation for the capture and storage of a photoplethysmography (PPG) signal. The LED duty cycle was altered to determine the effect on respiratory rate accuracy. The oximeter was mounted to the left index finger of ten healthy volunteers. The breathing rate derived from the oximeter was validated against a nasal airflow sensor. The duty cycle of a pulse oximeter was changed between 5%, 10% and 25% at a sample rate of 500 Hz...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29046768/smartphones-and-e-tablets-in-perioperative-medicine
#12
REVIEW
Frederic Michard
Smartphones and electronic tablets (e-tablets) have become ubiquitous devices. Their ease of use, smartness, accessibility, mobility and connectivity create unique opportunities to improve quality of surgical care from prehabilitation to rehabilitation. Before surgery, digital applications (Apps), serious games and text messaging may help for a better control of risk factors (hypertension, overweight), for smoking cessation, and for optimizing adherence to preoperative recommendations (e.g., regarding anticoagulation or antihypertensive treatments)...
October 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29045578/effectiveness-of-enhanced-pulse-oximetry-sonifications-for-conveying-oxygen-saturation-ranges-a-laboratory-comparison-of-five-auditory-displays
#13
E Paterson, P M Sanderson, N A B Paterson, R G Loeb
Background: Anaesthetists monitor auditory information about a patient's vital signs in an environment that can be noisy and while performing other cognitively demanding tasks. It can be difficult to identify oxygen saturation (SpO2) values using existing pulse oximeter auditory displays (sonifications). Methods: In a laboratory setting, we compared the ability of non-clinician participants to detect transitions into and out of an SpO2 target range using five different sonifications while they performed a secondary distractor arithmetic task in the presence of background noise...
October 13, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29043113/simultaneous-tracking-of-cardiorespiratory-signals-for-multiple-persons-using-a-machine-vision-system-with-noise-artifact-removal
#14
Ali Al-Naji, Javaan Chahl
Most existing non-contact monitoring systems are limited to detecting physiological signs from a single subject at a time. Still, another challenge facing these systems is that they are prone to noise artifacts resulting from motion of subjects, facial expressions, talking, skin tone, and illumination variations. This paper proposes an efficient non-contact system based on a digital camera to track the cardiorespiratory signal from a number of subjects (up to six persons) at the same time with a new method for noise artifact removal...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29029934/ability-of-pulse-wave-transit-time-to-detect-changes-in-stroke-volume-and-to-estimate-cardiac-output-compared-to-thermodilution-technique-in-isoflurane-anaesthetised-dogs
#15
H Sano, J P Chambers
OBJECTIVE: To evaluate the ability of pulse wave transit time (PWTT) to detect changes in stroke volume (SV) and to estimate cardiac output (CO) compared with the thermodilution technique in isoflurane-anaesthetized dogs. STUDY DESIGN: Prospective, experimental study. ANIMALS: Eight adult laboratory dogs. METHODS: The dogs were anaesthetized with isoflurane and mechanically ventilated. Reference CO (TDCO) was measured via a pulmonary artery catheter using the thermodilution technique and reference SV (TDSV) was calculated...
April 26, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28971391/evaluation-of-pulse-oximetry-knowledge-of-greek-registered-nurses
#16
John Stathoulis, Maria Tsironi, Nikolaos Konofaos, Sofia Zyga, Victoria Alikari, Evangelos C Fradelos, Helen Bakola, George Panoutsopoulos
Proper use and evaluation of the pulse oximeter readings in everyday clinical practice are related to patient safety and quality of provided patient healthcare. Purpose of this study was the evaluation of Greek registered nurses' knowledge in pulse oximetry before and after an educational intervention implemented in a 2-h educational intervention (workshop). Anonymous self-administered validated questionnaire consisted of two parts was used to collect the data, after the written consent of the author, in a sample consisted of 78 participants (12 men and 66 women) and the output data were analyzed with SPSS v...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28920806/accuracy-of-noninvasive-anesthetic-monitoring-in-the-anesthetized-giraffe-giraffa-camelopardalis
#17
Mads F Bertelsen, Carsten Grøndahl, George F Stegmann, Cathrine Sauer, Niels H Secher, J Michael Hasenkam, Mads Damkjær, Christian Aalkjær, Tobias Wang
This study evaluated the accuracy of pulse oximetry, capnography, and oscillometric blood pressure during general anesthesia in giraffes (Giraffa camelopardalis). Thirty-two giraffes anesthetized for physiologic experiments were instrumented with a pulse oximeter transmittance probe positioned on the tongue and a capnograph sampling line placed at the oral end of the endotracheal tube. A human size 10 blood pressure cuff was placed around the base of the tail, and an indwelling arterial catheter in the auricular artery continuously measured blood pressure...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28904271/frequent-oxygen-desaturation-during-sleep-on-the-day-of-bronchoscopy-evaluated-by-continuous-pulse-oximeter-monitoring
#18
Yasuo Chojin, Hiroshi Ishimoto, Shingo Noguchi, Toshinori Kawanami, Tatsuji Kato, Hiroshi Mukae, Kazuhiro Yatera
To perform a bronchoscopy safely, it is very important to make a risk assessment before and after the procedure. There have been no reports of hypoxemia during sleep on the day after a bronchoscopic examination; therefore, we evaluated the oxygen saturation status during sleep on the days before and after bronchoscopy. Thirty patients that underwent bronchoscopy were studied. Continuous pulse oximetry monitoring was performed on the day before bronchoscopy and the day when the bronchoscopy was performed. The average oxygen saturation levels and the oxygen desaturation index (ODI) were evaluated...
2017: Journal of UOEH
https://www.readbyqxmd.com/read/28899539/can-the-analysis-of-built-in-software-of-cpap-devices-replace-polygraphy-in-children
#19
Sonia Khirani, Vincent Delord, Jorge Olmo Arroyo, Livio De Sanctis, Annick Frapin, Alessandro Amaddeo, Brigitte Fauroux
OBJECTIVES: Polysomnography (PSG) is the gold standard for the scoring of residual respiratory events during continuous positive airway pressure (CPAP). Studies comparing PSG scoring with automatic scoring by the built-in software of CPAP devices have reported acceptable agreements except for the hypopnea index (HI) in adult patients, but no study has yet been conducted in children. The aim of the present study was to compare the automatic scoring by CPAP device and manual scoring using the software tracings of the CPAP device integrating pulse oximetry (SpO2) with in-lab polygraphy (PG)...
September 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28893740/an-unusual-presentation-of-chronic-cyanide-toxicity-from-self-prescribed-apricot-kernel-extract
#20
Alex Konstantatos, Malini Shiv Kumar, Aidan Burrell, Joel Smith
Hypoxia under general anaesthesia is a potentially life-threatening condition. A seemingly well 67-year-old man appeared hypoxic with peripheral pulse oximetric measurement during routine anaesthesia. Postoperatively, the patient admitted to daily self-prescription of apricot kernel extract for a period of 5 years. Apricot kernel is a commonly taken extract used for a range of ailments, and is associated with cyanide toxicity, which was confirmed through blood analysis. Our explanation for the hypoxic measurement was the presence of free cyanide interfering with functioning of the peripheral pulse oximeter...
September 11, 2017: BMJ Case Reports
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