PURPOSE To measure the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) and the pH of aqueous humor (AH) and arterial blood samples from rabbits using a blood gas analyzer. METHODS Twenty New Zealand rabbits were anesthetized intramuscularly with ketamine and xylazine and were then allowed to breathe room air. Using a gas blood analyzer, arterial blood and AH samples were analyzed f...

42 Abstract Background: Blood gas analysis is a widely used procedure. In clinical practice, the physicians may not always have a blood gas analyzer in their proximity. Not infrequently, blood gas samples are stored in a fridge or on ice and read retrospectively. Continued anaerobic and aerobic metabolism in the blood may alter blood gases in the interval between drawing arterial blood and its ...

effects of acute hypercapnia on the cardiovascular system (cys) were studied in the anesthetized cat. after surgery the animal was exposed to a gas mixture of 12% co2 and 25% o2 in nitrogen, and hypercapnia with low levels of arterial ph (pha) was produced for 20 minutes. in the second run the same level of hypercapnia was induced by ventilating the same cat from the above gas mixture but pha w...

Spirometric studies and arterial blood gas analyses were statistically evaluated in 75 patients with chronic airways obstruction to determine whether any spirometric parameters can predict arterial blood gas status. Radioactive lung scans, both ventilation (using '33Xe gas) and perfusion (using '31-MAA), were performed in selected patients. In all 75 patients as one group, no spirometric parame...

INTRODUCTION Identifying acute hypercapnic respiratory failure is crucial in the initial management of acute exacerbations of COPD. Guidelines recommend obtaining arterial blood samples but these are more difficult to obtain than venous. We assessed whether blood gas values derived from venous blood could replace arterial at initial assessment. METHODS Patients requiring hospital treatment fo...

OBJECTIVES To examine the impact of pulse oximetry on the use of arterial blood gas and other laboratory determinations and to examine predictors of the use of arterial blood gas measurements. DESIGN Before (preoximetry)/after (postoximetry) study. SETTING Thirty-bed multidisciplinary critical care unit. PATIENTS Consecutive admissions of 300 patients (150 before and 150 after oximetry). ...

Twenty-seven patients in cardiopulmonary arrest had simultaneous measurements of arterial and central venous blood gases during cardiopulmonary resuscitation (CPR) with a pneumatic chest comparison and ventilation device. Mean central venous and arterial hydrogen ion concentrations, PCO2 and calculated bicarbonate concentrations were significantly different (P less than 0.01) at all sampling ti...

abstract objective: to determine the correlation between blood gas parameters and central venous pressure (cvp) in patients suffering from septic shock. m e t h od s : forty adult patients with diagnosis of septic shock who were admitted to the emergency department (ed) of shohadaye tajrish hospital affiliated with shahid beheshti university of medical sciences, and met inclusion and exclusion ...

Pulse oximeters are used to noninvasively measure oxygen saturation in arterial blood (SaO2). Although arterial oxygen saturation measured by pulse oximeter (SpO2) is usually indicated in 1% increments, the value of SaO2 from arterial blood gas analysis is not an integer. We have developed a new pulse oximeter that can measure SpO2 to one digit after the decimal point. The values of SpO2 from t...

Neonates with respiratory distress syndrome (RDS), who are treated according to INSURE protocol; require arterial blood gas (ABG) analysis to decide on appropriate management. We conducted this study to investigate the validity of pulse oximetry instead of frequent ABG analysis in the evaluation of these patients. From a total of 193 blood samples obtained from 30 neonates <1500 grams with RDS,...