Non-invasive monitoring of arterial oxygen using percutaneous pulse oximetry is well established. Although some studies show a good correlation of transcutaneous end-tidal carbon dioxide partial pressure (PetCO2) with arterial carbon dioxide partial pressure (PaCO2), they were performed in research settings and involved restricted populations such as paediatric, accident and emergency, or inten...

Respiratory acidosis can become a serious problem during protective ventilation of severe lung failure. A pumpless arteriovenous interventional lung assist (iLA) for extracorporeal carbon dioxide removal has been used increasingly to control critical respiratory situations. The present study sought to evaluate the factors determining the efficacy of iLA and calculate its contribution to gas exc...

We have investigated, in 13 artificially ventilated and anaesthetized patients, the cardiovascular effects of peritoneal insufflation of carbon dioxide preparatory to laparoscopy. Stepwise increases of intra-abdominal pressure up to a maximum of 25 cm H(2)O were accompanied by increases of airway pressure, intrathoracic pressure, central venous pressure, and femoral venous pressure and by signs...

to study the effects of carbon dioxide enrichment on morphological, nutrient absorption and yield of wheat (triticum aestivum l. cv. pishtaz) under weed competitive pressure of wild oat (avena ludovicianal.), an experiment was conducted as a split plot based on a randomized completely block design during the 2013-2014 growing season at the research field of tarbiat modares university, iran. car...

LmLEJOHN, A. & BOWLES, FELICITY, 1982. Studies on the physiopathology of c~~r?nic obstructive pulmonary disease in the horse. VI. The alveolar dead space. Onderstepoon Journal ofVetenMry Research, 49. n..:n (1"982!. The alveolar dead space (VDalv) as a percentage of tidal volume was calculated in horses by substituting the values for partial pressure of carbon dioxide in end-expiratory gas (PE'...

A molecular dynamics simulation has been performed on the greenhouse gases carbon dioxide and methane dissolved in a sodium chloride aqueous solution, as a simple model of seawater. A carbon dioxide molecule is also treated as a hydrogen carbonate ion. The structure, coordination number, diffusion coefficient, shear viscosity, specific heat, and thermal conductivity of the solutions have been d...

Mean inspiratory flow, occlusion pressure and end-tidal PCO2 were measured in six healthy, sitting subjects, during breathing air and rebreathing carbon dioxide, before and after pentazocine 0.5 mg kg-1 i.v. and again after naloxone 20 micrograms kg-1. Pentazocine reduced the occlusion pressure and inspiratory flow responses at a given PCO2 during carbon dioxide rebreathing and these effects we...

A two-part experiment was designed to test the hypothesis that myocardial oxygen and carbon dioxide tensions, as measured by coronary venous oxygen and carbon dioxide tensions, determine coronary blood flow during increases in myocardial oxygen consumption. The left main coronary artery was pump-perfused at constant pressure in closed-chest, anesthetized dogs. Oxygenators in the perfusion circu...

BACKGROUND A new automated system of air tonometry (Tonocap; Datex Ohmeda, Helsinki, Finland) allows for frequent (every 15 min) measurement of gastric luminal partial pressure of carbon dioxide. Its use has not been described in cardiac surgical patients. METHODS One hundred patients undergoing coronary artery bypass graft or cardiac valve surgery were enrolled in a prospective cohort study....

Hazards of carbon dioxide insufflation during thoracoscopy Editor,—I read with interest the review article on the anaesthetic implications of thoracoscopic sympathectomy. 1 When endobronchial anaesthesia is used, carbon dioxide may be insufflated only initially into the ipsilateral pleural space to augment lung collapse. In contrast , when a tracheal tube is used, carbon dioxide is insufflated ...