Arterial blood is the standard sample for blood gas analysis but arterial blood sampling is more painful and hazardous to the patient. Such is the relative convenience and safety of sampling venous blood that several studies have sought to investigate the validity of its use as a substitute for arterial blood.  The...

The integrity and function of all cells depend on an adequate supply of oxygen. Severe acute illness is frequently associated with inadequate tissue perfusion and/or reduced amount of oxygen in blood (hypoxemia) leading to tissue hypoxia.  If not reversed, tissue hypoxia can rapidly progress to multiorgan failure and ...

Part 2: Red flags The transition from fetus to newborn is a process of rapid physiological adaptation that is sometimes delayed by complications. Most newborns complete the process of transition with little or no delay.  These infants may demonstrate normal transitional findings, including tachypnea and tachycardia, ...

In 2005, acutecaretesting.org interviewed Dr Michael Astion, an active spokesperson for patient safety and reduction of lab errors, on the main issues surrounding the topic. Since then, a lot has changed… or has it? In a follow-up interview with Astion, acutecaretesting.org gauges the status of patient safety year...

Tartu University Hospital has improved the quality of blood gas testing in its clinical laboratory and critical care units by introducing an automatic system for blood gas analysis [1].

Part 1: The physiology of transition The transition from fetus to neonate is a critical time of physiological adaptation. While the majority of term infants complete this process in a smooth and organized fashion, some infants experience a delay in transition or exhibit symptoms of underlying disease. Careful...

This essay is a follow-up to the 2006 series expressing concern that there is a widespread gap between QC theory and QC practice. Now we are giving you, the reader, the opportunity to rate your own QC practice and to help prove or disprove that gap.  If the QC theories generally recommended by recognized QC experts ...

Homeostatic mechanisms ensure that in health the extracellular fluid (ECF) concentration of electrolytes, including calcium, is maintained within well-defined limits. Abnormality in ECF calcium concentration can have profound adverse effects.  The most common means of assessing calcium status is to measure total...

Results of hemoglobin (Hb) and hematocrit (Hct) measurement are routinely used to assess blood loss among trauma patients. But is it necessary to measure both parameters and if not, is one more reliable than the other? There is evidence to suggest that many physicians believe hematocrit is a more sensitive indicator...

Despite the fact that self-monitoring of blood glucose (SMBG) apparently accounts for an amazing 20 % of the expenses of the total in vitro diagnostic market worldwide (27 % in the US), there remains a woeful lack of evidence that SMBG is actually effective in improving the clinical outcome of diabetic patients.  In...