Extract: Serial studies of arterial and alveolar oxygen, carbon dioxide, and nitrogen tensions, arterial pH, and ratios of dead space: tidal volume were made in 24 nondistressed premature infants. By ...

The influence of gravity on the distributions of ventilation and blood flow, as demonstrated by the effects of posture, is discussed and explained on the theoretical basis of gravitational gradients ...

This article, the last in a five-part series on nuclear medicine imaging techniques, explains how ventilation/perfusion scintigraphy works and what precautions are required when it is used Nuclear ...

Reports on the promise of MRI in selection of stroke patients for thrombolysis have been considerable. [44] However, there are some practical disadvantages of MRI compared with CT. First, an MRI scan ...

When you breathe, a certain fraction of your air enters the lungs and blood flows through the capillaries. When this ratio is above or below 0.8, you may have ventilation/perfusion (V/Q) mismatch. A V ...

Thrombolytic agents, including tenecteplase, are generally used within 4.5 hours after the onset of stroke symptoms. Information on whether tenecteplase confers benefit beyond 4.5 hours is limited. We ...

BMC Clin Pharmacol. 2010;10:1-27. However, there are some notable exceptions to this general rule where the adipose-blood exchange of several highly lipid soluble molecules seems to be diffusion ...

Establishing the Standard of Care for Patients with Newly Diagnosed and Recurrent Glioblastoma Magnetic resonance imaging (MRI) is the most useful imaging tool in the evaluation of patients with brain ...

Nuclear medicine provides imaging modalities that can be used to observe physiological processes in the human body, particularly in the bones, heart, lungs, renal system and brain.