scholarly journals Diagnostic importance of pulse oximetry in the determination of the stage of chronic arterial insufficiency of lower extremities

2010 ◽  
Vol 138 (5-6) ◽  
pp. 300-304 ◽  
Author(s):  
Nebojsa Ignjatovic ◽  
Marina Vasiljevic ◽  
Dragan Milic ◽  
Jelena Stefanovic ◽  
Miroslav Stojanovic ◽  
...  
Keyword(s):  
Pulse Oximetry ◽  
Arterial Oxygen Saturation ◽  
Lower Extremities ◽  
Arterial Oxygen ◽  
Critical Ischemia ◽  
High Incidence ◽  
Arterial Insufficiency ◽  
Peripheral Arterial ◽  
Diagnostic Importance

Introduction Chronic arterial insufficiency (CAI) of lower extremities is important socio-economical and healthcare problem, due to its high incidence of morbidity, disability and mortality. Objective The aim of our work was to determine the diagnostic importance of pulse oximetry in the early detection of stage of lower extremities CAI based on peripheral arterial oxygen saturation of haemoglobin (SpO2). Methods Prospectively, we analyzed a group of 50 patients, admitted at the Vascular Department of Surgical Clinic in Nis during the period from September 2006 to October 2007, with evident symptoms and signs of different stages of lower extremities CAI verified by ultrasonography. In patients with lower extremity disorder of tissue arterial capillaries, SpO2 was determined by pulse oximetry. Results Using pulse oximetry, depending on the of stage of lower extremities CAI, we revealed a considerable difference in the stages of functional ischemia SpO2: Fontaine I - 95.33?1.41%, Fontaine IIa - 92.14?2.27% and Fontaine IIb - 79.67?2.73%; in stage critical ischemia SpO2: Fontaine III - 62.54?4.39% and Fontaine IV - 47.67?6.16%. In 3 patients with gangrenous foot and fingers SpO2 was immeasurable and progressive decrease in SpO2 of arterial capillaries (p<0.01 between stages). Conclusion Due to the reliability and simplicity of pulse oximetry it can be a routinely used diagnostic device for patients with early determined stage of lower extremities CAI. .

scholarly journals Accuracy of Pulse Oximetry in the Presence of Fetal Hemoglobin—A Systematic Review

Children ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 361
Author(s):  
Ena Pritišanac ◽  
Berndt Urlesberger ◽  
Bernhard Schwaberger ◽  
Gerhard Pichler
Keyword(s):  
Pulse Oximetry ◽  
Neonatal Intensive Care ◽  
English Language ◽  
Arterial Oxygen Saturation ◽  
Fetal Hemoglobin ◽  
Arterial Oxygen ◽  
Cochrane Library ◽  
Preterm Neonates ◽  
Neonatal Blood ◽  
The Impact

Continuous monitoring of arterial oxygen saturation by pulse oximetry (SpO2) is the main method to guide respiratory and oxygen support in neonates during postnatal stabilization and after admission to neonatal intensive care unit. The accuracy of these devices is therefore crucial. The presence of fetal hemoglobin (HbF) in neonatal blood might affect SpO2 readings. We performed a systematic qualitative review to investigate the impact of HbF on SpO2 accuracy in neonates. PubMed/Medline, Embase, Cumulative Index to Nursing & Allied Health database (CINAHL) and Cochrane library databases were searched from inception to January 2021 for human studies in the English language, which compared arterial oxygen saturations (SaO2) from neonatal blood with SpO2 readings and included HbF measurements in their reports. Ten observational studies were included. Eight studies reported SpO2-SaO2 bias that ranged from −3.6%, standard deviation (SD) 2.3%, to +4.2% (SD 2.4). However, it remains unclear to what extent this depends on HbF. Five studies showed that an increase in HbF changes the relation of partial oxygen pressure (paO2) to SpO2, which is physiologically explained by the leftward shift in oxygen dissociation curve. It is important to be aware of this shift when treating a neonate, especially for the lower SpO2 limits in preterm neonates to avoid undetected hypoxia.

scholarly journals Accuracy of two pulse-oximetry measurements for INTELLiVENT-ASV in mechanically ventilated patients: a prospective observational study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shinshu Katayama ◽  
Jun Shima ◽  
Ken Tonai ◽  
Kansuke Koyama ◽  
Shin Nunomiya
Keyword(s):  
Oxygen Saturation ◽  
Pulse Oximetry ◽  
Prospective Observational Study ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Arterial Blood Gas ◽  
Mechanically Ventilated ◽  
Mechanically Ventilated Patients ◽  
Arterial Blood ◽  
Ventilated Patients

AbstractRecently, maintaining a certain oxygen saturation measured by pulse oximetry (SpO2) range in mechanically ventilated patients was recommended; attaching the INTELLiVENT-ASV to ventilators might be beneficial. We evaluated the SpO2 measurement accuracy of a Nihon Kohden and a Masimo monitor compared to actual arterial oxygen saturation (SaO2). SpO2 was simultaneously measured by a Nihon Kohden and Masimo monitor in patients consecutively admitted to a general intensive care unit and mechanically ventilated. Bland–Altman plots were used to compare measured SpO2 with actual SaO2. One hundred mechanically ventilated patients and 1497 arterial blood gas results were reviewed. Mean SaO2 values, Nihon Kohden SpO2 measurements, and Masimo SpO2 measurements were 95.7%, 96.4%, and 96.9%, respectively. The Nihon Kohden SpO2 measurements were less biased than Masimo measurements; their precision was not significantly different. Nihon Kohden and Masimo SpO2 measurements were not significantly different in the “SaO2 < 94%” group (P = 0.083). In the “94% ≤ SaO2 < 98%” and “SaO2 ≥ 98%” groups, there were significant differences between the Nihon Kohden and Masimo SpO2 measurements (P < 0.0001; P = 0.006; respectively). Therefore, when using automatically controlling oxygenation with INTELLiVENT-ASV in mechanically ventilated patients, the Nihon Kohden SpO2 sensor is preferable.Trial registration UMIN000027671. Registered 7 June 2017.

scholarly journals The Effect of Supplemental Oxygen on the Incidence of Hypoxaemia after Premedication in Patients Undergoing Cardiac Surgery

1997 ◽  
Vol 25 (4) ◽  
pp. 347-349 ◽  
Author(s):  
C. F. Royse ◽  
R. J. B. Tiernan ◽  
S. M. Portelli ◽  
S. Davies ◽  
R. Arblaster ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Arterial Oxygen Saturation ◽  
Supplemental Oxygen ◽  
Arterial Oxygen ◽  
Patient Demographics ◽  
Routine Administration ◽  
High Incidence ◽  
Patient Groups ◽  
To Receive ◽  
Elective Patients

Opiate premedication may cause significant respiratory depression, particularly when other sedative agents such as scopolamine or benzodiazepines are added. This can cause hypoxaemia with potential for worsening myocardial ischaemia in cardiac surgery patients. The aim of this study was to investigate the incidence of hypoxaemia (SpO2 <90%) in elective patients undergoing cardiac surgery and to assess the efficacy of supplemental oxygen in preventing it. One hundred elective patients without significant respiratory disease or cardiac failure, who received both an opiate and a sedative premedication, were prospectively randomized to receive either oxygen via a facemask at 4 l/min or no oxygen. Continuous arterial oxygen saturation was recorded using a pulse oximeter from the time of premedication until the patient arrived in theatre. An SpO2 <90% was recorded as a significant event and oxygen was administered to the patients. Six patients were excluded because of equipment failure or protocol violations. The patient groups were comparable with respect to patient demographics, premedication type and dose or the duration of monitoring. In patients receiving oxygen (n=48) there were no episodes of hypoxaemia (0%). In patients not receiving oxygen (n=46) there were 14 episodes of hypoxaemia (30%, P<0.0001). We conclude that there is a significantly high incidence of hypoxaemia in cardiac surgery patients following combined opiate and sedative premedication and that it can be reduced by the routine administration of supplemental oxygen.

Effect of subcutaneous arterial pulsation on determination of cerebral arterial oxygen saturation using NIRS

2000 ◽  
Author(s):  
Ralph J. F. Houston ◽  
Jan Menssen ◽  
Marco C. van der Sluijs ◽  
Willy N. Colier ◽  
Berend Oeseburg
Keyword(s):  
Oxygen Saturation ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Arterial Pulsation

Pulse Oximetry: An Alternative Method for the Assessment of Oxygenation in Newborn Infants

PEDIATRICS ◽  
1987 ◽  
Vol 79 (4) ◽  
pp. 524-528
Author(s):  
Michael S. Jennis ◽  
Joyce L. Peabody
Keyword(s):  
Pulse Oximetry ◽  
Pulse Oximeter ◽  
Arterial Oxygen Saturation ◽  
Newborn Infants ◽  
Fetal Hemoglobin ◽  
Arterial Oxygen ◽  
Skin Injury ◽  
Reliable Technique ◽  
Arterial Blood

Continuous monitoring of oxygenation in sick newborns is vitally important. However, transcutaneous Po2 measurements have a number of limiations. Therefore, we report the use of the pulse oximeter for arterial oxygen saturation (Sao2) determination in 26 infants (birth weights 725 to 4,000 g, gestational ages 24 to 40 weeks, and postnatal ages one to 49 days). Fetal hemoglobin determinations were made on all infants and were repeated following transfusion. Sao2, readings from the pulse oximeter were compared with the Sao2 measured in vitro on simultaneously obtained arterial blood samples. The linear regression equation for 177 paired measurements was: y = 0.7x + 27.2; r = .9. However, the differences between measured Sao2 and the pulse oximeter Sao2 were significantly greater in samples with &gt; 50% fetal hemoglobin when compared with samples with &lt; 25% fetal hemoglobin (P &lt; .001). The pulse oximeter was easy to use, recorded trends in oxygenation instantaneously, and was not associated with skin injury. We conclude that pulse oximetry is a reliable technique for the continuous, noninvasive monitoring of oxygenation in newborn infants.

A Study of Transcutaneous Oxygen Saturation by Pulse Oximetry in Symptomatic Ischaemic Lower Limb – A Cross Sectional Analytical Study in a Tertiary Care Hospital in Tirupathi

2021 ◽  
Vol 8 (32) ◽  
pp. 3018-3022
Author(s):  
Sadhu Nagamuneiah ◽  
Gandikota Venkata Prakash ◽  
Sabitha P ◽  
Jandla Bhulaxmi ◽  
Dintyala Venkata S.S.Dintyala Venkata S.S. Mythri ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Pulse Oximetry ◽  
Analytical Study ◽  
Lower Extremities ◽  
Care Hospital ◽  
Colour Doppler ◽  
Duplex Scan ◽  
Cross Sectional ◽  
Transcutaneous Oxygen ◽  
Arterial Insufficiency

BACKGROUND Chronic arterial insufficiency (CAI) results in stenotic-occlusive disease of vascularized arterial disorders of tissues and organs. CAI of the lower extremities represents a significant medical and socio-economic problem due to a high incidence of morbidity, invalidity and mortality. METHODS A cross sectional analytical study was conducted in a group of 100 patients, admitted at the Vascular Department of the Sri Venkateshwara Ramnaraian Ruia Government General Hospital, Tirupati during the period from September 2018 to August 2019, with evident symptoms and signs of different stages of lower extremities CAI verified by ultrasonography. In patients with lower extremity disorder of tissue arterial capillaries, SpO2 was determined by pulse oximetry. CAI of the lower extremity was determined on the basis of clinical findings and colour Doppler duplex scan echo sonography results. Using the conventional method (single-gate) and colour Doppler duplex scan (multi-gate), the presence and localization of stenosis, the segmental predominance (with multisegmental forms) and the degree of progression of stenotic-occlusive lesions were verified. RESULTS Results Using pulse oximetry, depending on the of stage of lower extremities CAI, we revealed a considerable difference in the stages of functional ischemia Mean SpO2: Fontaine I – 95.50 %, Fontaine II – 92.90; in stage critical ischemia SpO2: Fontaine III – 65.00 % and Fontaine IV – 49.87 %. In 29 patients with gangrenous foot and fingers SpO2 was immeasurable and progressive decrease in SpO2 of arterial capillaries (p<0.01 between stages). CONCLUSIONS Due to the reliability and simplicity of pulse oximetry it can be a routinely used diagnostic device for patients with early determined stage of lower extremities CAI. KEYWORDS Chronic Arterial Insufficiency, SPO2, Pulse Oximetry, Ischemia

scholarly journals Nocturnal oxyhemoglobin desaturation during sleep in congestive heart failure patients

2016 ◽  
Vol 29 (3) ◽  
pp. 597-606
Author(s):  
Jéssica Julioti Urbano ◽  
Lilian Nanami Uchiyama ◽  
Anderson Soares Silva ◽  
Roger André Oliveira Peixoto ◽  
Sergio Roberto Nacif ◽  
...  
Keyword(s):  
Heart Failure ◽  
Congestive Heart Failure ◽  
Sleep Apnea ◽  
Pulse Oximetry ◽  
Arterial Oxygen Saturation ◽  
Central Sleep Apnea ◽  
Arterial Oxygen ◽  
Sleep Breathing Disorders ◽  
Breathing Disorders ◽  
Obstructive Sleep

Abstract Introduction: Sleep breathing disorders occur in 45% of patients with heart failure, with 36%-50% manifesting Cheyne-Stokes respiration with central sleep apnea and 12% exhibiting obstructive sleep apnea. Several studies have shown that sleep pathophysiology may negatively affect the cardiovascular system and that cardiac dysfunction alters sleep and respiration. Objective: The aim of this study was to examine oxyhemoglobin desaturation during sleep in patients with congestive heart failure (CHF) using overnight pulse oximetry. Methods: Overnight pulse oximetry was conducted in the patients' homes with wrist pulse oximeters and finger probes that were placed around the forefingers of 15 patients with CHF and ejection fractions less than 50%, who were classified as New York Heart Association functional classes II and III. Results: The patients were divided into two groups. The first group consisted of seven patients with oxyhemoglobin desaturation indices of over 5 events/h, and the second group contained eight patients with oxyhemoglobin desaturation indices of 5 or less events/h. Student's t-tests did not show any significant differences between the groups. The patients' body mass indices correlated positively with the total desaturation episodes and desaturation time less than 90% and correlated negatively with the arterial oxygen saturation nadir. Conclusion: Pulse oximetry monitoring during sleep can be used to detect sleep breathing disorders in stable patients with CHF.

Validation of Arterial Oxygen Saturation Measurements in Utero Using Pulse Oximetry

2008 ◽  
Vol 10 (03) ◽  
pp. 250-254 ◽  
Author(s):  
Andrew Harris ◽  
Michael Sendak ◽  
D. Chung ◽  
Charles Richardson
Keyword(s):  
Oxygen Saturation ◽  
Pulse Oximetry ◽  
Arterial Oxygen Saturation ◽  
In Utero ◽  
Arterial Oxygen

Oxygen pulse

2021 ◽  
pp. 51-55
Author(s):  
William J.M. Kinnear ◽  
James H. Hull
Keyword(s):  
Cardiac Output ◽  
Oxygen Uptake ◽  
Arterial Oxygen Saturation ◽  
Recovery Phase ◽  
Arterial Oxygen ◽  
Low Cardiac Output ◽  
Oxygen Pulse ◽  
A Value ◽  
Peripheral Arterial ◽  
Mixed Venous

This chapter outlines how dividing the volume of oxygen uptake (VO2) by the pulse rate gives an estimate of the stroke volume of the heart. The amount of oxygen taken up with each heartbeat is called the oxygen pulse (O2 pulse). It should increase steadily on exercise to a value above 10 ml/beat and may continue to rise during the recovery phase. A low O2 pulse can be an indicator of low cardiac output. If the maximum VO2 (VO2max) is normal, caution should be used in the interpretation of a low O2 pulse. Sometimes the O2 pulse is abnormal because of a fall in peripheral arterial oxygen saturation (SpO2) or mixed venous oxygen levels.

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