Results 171 to 180 of about 15,062 (202)

Shunt effect of carboxyhemoglobin

Critical Care Medicine, 1979
Estimation of intrapulmonary blood shunt fraction requires accurate evaluation of pulmonary capillary, arterial, and mixed venous oxygen contents. The presence of carboxyhemoglobin, as well as methemoglobin and sulfhemoglobin, may lead to large errors in the calculated intrapulmonary blood shunt fraction. The errors are most pronounced at low values of
J D, Cohn, P E, Engler
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Carboxyhemoglobin in Nonsmokers

Archives of Environmental Health: An International Journal, 1975
A study was made of existing mathematical models for both carbon monoxide (CO) and carboxyhemoglobin (COHb) buildup. From these models a combined model was derived for calculating delta%COHb in nonsmokers in an enclosed space in which excess concentrations of CO may occur.
R M, Jones, R, Fagan
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Carboxyhemoglobin Elevation in Trauma Victims

The Journal of Trauma: Injury, Infection, and Critical Care, 1999
Products of the hemeoxygenase enzyme include carboxyhemoglobin (COH) and bilirubin, which have protective effects in stressed states. Hemeoxygenase-1 enzyme up-regulates in states of oxidative stress. We hypothesized that COH is elevated in septic trauma patients compared with nonseptic patients.A prospective study was carried out at a Level I trauma ...
M, Moncure, C E, Brathwaite, E, Samaha, R, Marburger, S E, Ross   +4 more
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Carboxyhemoglobin Concentrations in Normal Cattle

American Journal of Veterinary Research, 1975
SUMMARY Percentage carboxyhemoglobin (HbCO) values were determined in 29 cows and 24 bulls in Minnesota during the summer of 1973. Results indicated that, in normal cattle, the HbCO value was 0.3%. Individual and daily variations in these values were recorded in 2 calves.
D I, Saror, R R, Engel, V, Perman, J B, Stevens   +3 more
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Estimation of Carboxyhemoglobin

Environmental Science & Technology, 1999
Carbon monoxide can be lethal at concentrations of less than 0.1%. The kinetics and mechanism of its toxicology have been described elegantly by Coburn et al. (J. Clin. Invest. 1965, 44, 1899−1910):  CO combines readily with blood hemoglobin to form carboxyhemoglobin (COHb).
William G. Lloyd, Donald R. Rowe
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False Elevation of Carboxyhemoglobin

Pediatric Emergency Care, 2011
Carbon monoxide toxicity in infants and children, like adults, produce nonspecific symptoms with normal vital signs necessitating the serum measurement of carboxyhemoglobin (COHb). In infants, the COHb may be falsely elevated.Our goal was to report a case of suspected carbon monoxide toxicity in an infant and the likely cause of the falsely elevated ...
Shruti, Mehrotra, Marcia, Edmonds, Rodrick K, Lim   +2 more
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Carboxyhemoglobin Levels in Banked Blood

Chest, 1984
To determine the prevalence of carboxyhemoglobin levels in banked blood exceeding Air Quality Standards (level of carboxyhemoglobin greater than 1.5 percent), we analyzed banked blood for the level of carboxyhemoglobin from 101 randomly selected samples. Of 101 units of banked blood, 49 (49 percent) had carboxyhemoglobin levels greater than 1.5 percent,
W S, Aronow, W J, O'Donohue, J, Freygang, M H, Sketch   +3 more
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Carboxyhemoglobin levels in fire fighters

Lung, 1976
The occupational effect of carbon monoxide on blood carboxyhemoglobin levels (COHb) from smoke inhalation was studied in 51 fire fighters.
J, Loke, W C, Farmer, R A, Matthay, J A, Virgulto, A, Bouhuys   +4 more
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Temporal Variation of Carboxyhemoglobin Concentrations

Archives of Environmental Health: An International Journal, 1969
Carboxyhemoglobin concentrations ([COHb]) were measured in 15 subjects by analysis of alveolar air samples collected at two-hour intervals during waking hours on seven consecutive days. Overall mean values were 3.80% COHb for five cigarette smokers and 1.64% COHb for ten nonsmokers. Analysis of the results indicates that long-term average [COHb] can be
P M, McIlvaine, W C, Nelson, D, Bartlett
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Carboxyhemoglobin: a primer for clinicians

Undersea and Hyperbaric Medicine, 2018
One of carbon monoxide’s several mechanisms of toxicity is binding with circulating hemoglobin to form carboxyhemoglobin, resulting in a functional anemia. While patients with carbon monoxide poisoning are often said to be “cherry-red,” such discoloration is rarely seen.
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