Disease relevance of Oximetry

• Peak expiratory flow, dyspnea scores, arterial hemoglobin oxygen saturation by pulse oximetry, maximal inspiratory and expiratory pressures, and vital signs were monitored for 45 minutes after the start of magnesium sulfate or placebo treatment [1].
• Apnea was diagnosed exclusively by continuous recording of heart rate, respiratory impedance, end-tidal CO2, and either or both transcutaneous oxygen and pulse oximetry [2].
• Dapsone-induced methemoglobinemia and pulse oximetry [3].
• OBJECTIVE: To address the ability and reliability of the INVOS 3100A (Somanetics, Troy, MI) cerebral oximeter to detect cerebral desaturation in patients and the interpretation of cerebral oximetry measurements using the INVOS 3100A in stroke and cardiac arrest [4].
• BACKGROUND: Methacholine-induced bronchoconstriction is associated with significant hypoxemia, which can be assessed noninvasively by transcutaneous oxygen tension and pulse oximetry [5].

High impact information on Oximetry

• Using a combination of enzyme oximetry, pulse radiolysis, and chemical oxidation, the study of structurally modified dopaquinones provides firm evidence of nonenzymatic catechol formation during tyrosinase oxidation of phenols and reveals significant differences in their modes of reaction [6].
• Left-to-right shunt (by oximetry in 16 of 17 patients) was 2.4 to 16.2 L/min, and the Qp/QS ratio was 1.4 to 4 [7].
• Lithium phthalocyanine: a probe for electron paramagnetic resonance oximetry in viable biological systems [8].
• Among the 33 patients recatheterized at 6 months, oximetry had detected AS in 10, and dilution curves detected AS in an additional nine (total, 58%) immediately after PMV [9].
• MC 540-mediated photooxidation of histidine, arachidonate, and unsaturated phospholipid vesicles was assessed by spin label oximetry and shown to involve type II (singlet oxygen) chemistry [10].

Chemical compound and disease context of Oximetry

• Although the threshold for cerebral hypoxia in jugular bulb oximetry (measurement of O2 saturation in the jugular vein (SjvO2)) is generally accepted to be 50% oxygen saturation, a comparable value in brain tissue PO2 (PtiO2) monitoring, a new method for direct assessment of PO2 in the cerebral white matter, has not yet been established [11].
• HYPOTHESIS: The changes reported with pulse oximetry after the injection of isosulfan blue for sentinel lymph node identification in patients with breast cancer are consistent and predictable [12].
• Benzocaine-induced methemoglobinemia in an adult: accuracy of pulse oximetry with methemoglobinemia [13].
• Noninvasive tissue oximetry may be useful to evaluate the effect of coenzyme Q10 supplementation to patients with mitochondrial encephalomyopathy including MELAS [14].
• We present two cases in which methylene blue injection during urological surgery appeared to cause arterial oxygen desaturation by pulse oximetry and methemoglobinemia by arterial blood gas co-oximetry [15].

Biological context of Oximetry

• Progress of lipid peroxidation, induced by aerobic photoexcitation of rose bengal, was monitored by the detection of lipid hydroperoxides and by electron spin resonance oximetry [16].
• This work broadens the scope and improves the time resolution of spin-probe oximetry, a technique in which small nitroxide spin probes detect oxygen consumption via change in their relaxation properties [Froncisz, W., Lai, C.-S., & Hyde, J. S. (1985) Proc. Natl. Acad. Sci. U.S.A. 82, 411-415] [17].
• A detailed study of the kinetics of iron(II) oxidation by molecular oxygen in natural and recombinant human apoferritins has been carried out using electrode oximetry to better understand the ferroxidase activity of the protein shell [18].
• Variables monitored during these 5-min periods included heart rate, respiratory rate, mean arterial pressure, mean airway pressure (Paw), end-tidal CO2 (PetCO2), pulse oximetry oxygen saturation, PaO2, and PaCO2 [19].
• Blood pressure, heart rate, hemoglobin oxygen saturation via finger pulse oximetry, and ventilatory and occlusion pressure responses to CO2 were obtained before and 20, 40, 60, 90, 120, 180, 240, 300, and 360 min after administration of drug or drug combination [20].

Anatomical context of Oximetry

• OBJECTIVE: To compare the clinical performance of three pulmonary artery oximetry catheters (Oximetrix 3, SAT-2, and HEMOPRO2) in intensive care unit (ICU) patients [21].
• Radial artery pressure, brain electrical activity, arterial and cerebral venous oximetry (dual oximetry), end-tidal CO2 and nasopharyngeal temperature were recorded continuously in each patient [22].
• Arteriovenous O2 saturation for temporal and nasal vascular segments of the affected eyes, evaluated by retinal vessel oximetry, was 12% +/- 9% higher than in the fellow eyes (seven patients) [23].
• Effects of conjugated linoleic acid on oxygen diffusion-concentration product and depletion in membranes by using electron spin resonance spin-label oximetry [24].
• STUDY OBJECTIVE: To compare the PercussiveTech HF (PTHF) device (Vortran Medical Technology 1; Sacramento, CA) to standard manual chest physiotherapy (CPT) with respect to acute changes in pulmonary function, sputum production, and pulse oximetry in patients with cystic fibrosis (CF) [25].

Associations of Oximetry with chemical compounds

• During FOB and the 30 min thereafter, pulse oximetry values (Sp(O(2))) were significantly higher in the CPAP than the Oxygen group (95.7 +/- 1.9% versus 92.6 +/- 3.1, p = 0.02) [26].
• Ventilation was compared in the two groups by continuous pulse oximetry, by venous blood gases on postoperative day 1 (POD 1) and by CO2 response curves [27].
• Blood glucose levels were determined by oximetry before and 30, 60, and 120 min after the glucose administration [28].
• To correct for damping of the S state synchronization during the flash sequence, the Kok parameters were estimated by measuring the oxygen flash pattern in situ using nitroxide-based EPR oximetry [29].
• Oxygen consumption by tyrosinase during oxidation of the monohydric phenol substrates tyrosine and 4-hydroxyanisole (4HA) was monitored by oximetry in order to determine the stoichiometry of the reactions [30].

Gene context of Oximetry

• All patients were monitored with EKG, NIBP and pulse oximetry (SPO2) during the operation [31].
• Combined with continuous pulse oximetry they can be used as an alternative to arterial blood gas measurements in patients with acute exacerbations of COPD [32].
• In 16 patients with an atrial septal defect, the Qp/Qs ration measured by oximetry ranged from 1.34 to 4.61 and by pulsed Doppler echocardiography from 1.31 to 4.46 (p = NS) [33].
• CONCLUSIONS--The BTS pulse oximetry criteria are highly specific when positive (specificity = 100%), but may miss patients with the SAHS who have hypopnoeic episodes which cause arousal but not significant oxygen desaturation (sensitivity = 31%) [34].
• Total hospitalization respiratory care costs for COPD patients were higher, $4,064 ($2,422-$9,572) vs. $2,342 ($1,186-$4,591), (p = .0001), and 74.4% of the median difference in cost between COPD patients and others was accounted for by spontaneous nebulizers (p = .001), metered dose inhalers (p = .01), and pulse oximetry (p = .02) [35].

Analytical, diagnostic and therapeutic context of Oximetry

• All patients were weaned by intermittent mandatory ventilation, but each was assigned randomly to either a control group monitored with periodic ABG sampling or to an experimental group, monitored by following PetCO2 and O2 Sat via pulse oximetry [36].
• Vital signs, pulse oximetry, laser Doppler flowmetry, and toe temperature were measured to evaluate diaspirin cross-linked hemoglobin solution's pharmacodynamic effects [37].
• Tumor oximetry: demonstration of an enhanced dynamic mapping procedure using fluorine-19 echo planar magnetic resonance imaging in the Dunning prostate R3327-AT1 rat tumor [38].
• MR examinations, blood (serum creatinine, S-ASAT, S-ALAT, S-bilirubin, alkaline phosphatase) and urine (proteins, blood, others) sampling before sedation and after examination, heart rate (electrocardiography) and oxygen saturation (pulse oximetry) during examination, adverse events, and efficacy parameters were analyzed [39].
• Patients and measurements: All patients > or = 35 years old who underwent spirometry, diffusing capacity of the lung for carbon monoxide (DLCO), lung volumes, and pulse oximetry during 3-min submaximal step-test exercise during 1996 were included (4,545 men and 3,472 women) [40].

References