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Articles by J. A. Widness
Showing articles by "J. A. Widness"
Article
January 2001
Hyperbilirubinemia and requirements to the determination of the concentration of bilirubin
60 % of all neonates develop jaundice during their first week of life and thereby run a risk of getting hyperbilirubinemia.
Although different approaches for establishing treatment criteria have been suggested, treatment of neonatal hyperbilirubinemia is usually still based on the measurement of total bilirubin...
Preanalytical phase
Bilirubin
Neonatology
Hemoglobins
Article
December 2000
Blood gases, acid-base balance, muscle mass and exercise capacity at the upper tolerable limit for humans of acute and chronic hypoxia
An altitude of 5,000 meters above sea level or just above is just about what humans can bear - be it during an acute ascent or for permanent living. This study describes how bodily functions of crucial importance to survival at high altitude adjust after abrupt exposure to severe hypoxia.
Blood gases/acid-base
Glucose
Article
November 2000
Myocardinal oxygen extraction after two months of adaptation to high altitude
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.
Point-of-care testing
Blood gases/acid-base
Lactate
Hemoglobins
Article
May 2000
Laboratory supervision of point-of-care blood gas
Providing continuous technical support and reliable test data collection for point-of-care blood gas testing is a difficult task for many laboratories. Here we describe how the implementation of an integrated instrument control and data management system for point-of-care blood gas testing has streamlined these...
Point-of-care testing
Glucose
Lactate
Hemoglobins
Article
April 2000
Measurement of transcutaneous oxygen tension in patients with diabetic foot complications
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...
Blood gases/acid-base
Article
April 2000
Clinical cases on detection of critical limb ischemia
How relevant is transcutaneous measurements in the detection of critical limb ischemia? Acutecaretesting.org has asked a group of respected researchers and clinicians in the US and Europe to describe how they use transcutaneous measurements in their daily work.
Blood gases/acid-base
Article
November 1999
Point-of-care testing for blood gases and electrolytes
The pro-con debate on the advisability of introducing POCT deals with the likely clinical benefits but – to an even higher degree – with the economic aspects. We discuss various models for determining the costs, and some caveats.
Blood gases/acid-base
Electrolytes
Point-of-care testing
Glucose
Article
November 1999
Management of point-of-care testing
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,...
Point-of-care testing
Glucose
Hemoglobins
Article
May 1999
Carbon monoxide intoxication - diagnosis and treat
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.
Blood gases/acid-base
Hemoglobins
Article
May 1999
Application of hemoglobin derivatives in STAT analysis
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,...
Blood gases/acid-base
Glucose
Lactate
Hemoglobins
