Measurements of the rate of uptake of soluble gases such as nitrous oxide or acetylene has been used as the basis of a method of cardiac output estimation since 1912. Using theoretical models of single, multiple and rebreathing techniques of cardiac output measurement, we determined the effect of solubility in blood and lung tissue on the changes in the final expired concentration of the gas. D...

Objective: To determine how well neonatal blood base excess and lactate predict outcome following perinatal asphyxia. Study Design: Over 68 months, with around 9000 deliveries, lactate was measured on all blood gases taken from neonatal admissions, as well as mineral base and organic acid whenever electrolytes were required. Infants were classified according to their outcome more than 10 years ...

Continuous analysis of oxygen and carbon dioxide tension in the blood phase, over periods of 4-5 h, was carried out in the pulmonary artery (93 determinations in six anesthetized dogs) and in the aorta (29 determinations in four anaesthetized dogs). Silastic-covered stainless steel catheters attached to a mass spectrometer were used. The mass spectrometer signals were linearly related to the bl...

Background: Some operating room personnel are occupationally exposed to genotoxic agents such as anesthetic gases and ionizing radiation. Adaptive response, as a defense mechanism, will occur when cells become exposed to a low dose of factors harming DNA (priming dose), which in the subsequent exposure to higher dose of those factors (challenging dose), show more resistance and sensibility.. <b...

Background: The aim of this study was to evaluate the efficacy of arterial blood gases (ABGs) in determining the type of intoxication. Methods: Medical charts of all patients who had referred to the toxicology ward of Baharloo Hospital between January 2009 and December 2009 were evaluated. After excluding the patients with multi-drug toxicity, data, including age, sex, type of intoxication ...

background: the aim of this study was to evaluate the efficacy of arterial blood gases (abgs) in determining the type of intoxication. methods: medical charts of all patients who had referred to the toxicology ward of baharloo hospital between january 2009 and december 2009 were evaluated. after excluding the patients with multi-drug toxicity, data, including age, sex, type of intoxication (the...

Cheyne-Stokes respiration is characterized by rhythmic changes in breathing in which periods of respiratory pause alternate with periods of slowly increasing and decreasing respiratory activity. It may be accompanied by phasic variations in the functions of the heart, nervous system and other organs, and has more recently been found to be associated with periodic variation in the concentration ...