The concept of “metrological traceability” is important when establishing comparable clinical decision limits for a measured analyte at different hospitals within one country and in different countries.  This can only be achieved if all instrument manufacturers establish the performance characteristics of their...

What quality is being controlled in laboratories today?  The definition of a quality requirement for each laboratory test is the starting point of quantitative quality management. Different types of requirements may be used as long as there are appropriate quality-planning models for translating those requirements...

The results of laboratory tests are used in many clinical settings. In the main, results obtained in point-of-care testing (POCT) are used either in monitoring or in diagnosis. Analytical quality does affect outcomes in these clinical situations. Numerical estimates of the quality required for laboratory tests to...

Whether performed by one "traditional" or several "point-of-care" devices, all Multi-Profile Blood Gas (MPBG) results must be accurate and precise if they are to be effective in managing critically ill patients. Optimal analytical quality control of multi-profile blood gas analysis requires a good quality assurance...

Two months of acclimatization to high altitude leads to an adaptation of the aerobic capacity of the myocardium, characterized by an increased ability to extract O₂ from the coronary vascular bed. An increased mitochondrial volume and activity of oxidative enzymes or improved diffusion conditions could be involved.

Examination of peripheral pulses and peripheral blood pressures are commonly used methods for investigation of macrocirculation. However, falsely elevated peripheral blood pressures may complicate the accurate prediction of ulcer healing in diabetic patients.  Because tcpO₂ also measures the nutritive skin capillary...

Point-of-care testing (POCT) is a delivery option for performing laboratory testing closer to the patient. Due to increasing healthcare pressures for faster turnaround of laboratory results and the development of a broader menu of testing devices, POCT is growing in popularity. Devices today are more portable,...

The effects of carbon monoxide poisoning have been found to be greatly alleviated, or in some cases eliminated, through the use of hyperbaric oxygen therapy. This paper discusses the pathophysiology of carbon monoxide intoxication and presents an overview of its treatment.

Our ability to assess the oxygenation status in critical care with a high degree of accuracy has improved as a result of recent developments in optical technology. The determination of the oxygenation status, however, remains a complex issue due to its multifaceted nature. This review discusses the definitions,...

The possibility of continuously monitoring arterial blood oxygen and carbon dioxide using heated surface electrodes on human skin was discovered in the early 1970s and made commercially available by 1976.  These devices were applied initially to premature infants in an effort to reduce the incidence of blindness due...