Saturday, July 10, 2010

Schwann Cell and Action Potential (Why teenagers have quick responses!!)

This video demonstrates the development of myelin in the peripheral nervous system and the propagation of action potential along a myelinated axon. The video was completed by Marziah Karch as her 2008 sabbatical project from the script and voiceover of Professor Marilyn Shopper.

This is close captioned, but in some cases a few of the words were left out to make it possible to read it at all.

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How Klebsiella infection appears on chest X-ray

Imaging Findings :
Homogeneous parenchymal consolidation containing air bronchograms (simulates pneumococcal pneumonia). Primarily involves the right upper lobe. Typically induces a large inflammatory exudate, causing increased volume of the affected lobe and characteristic bulging of an adjacent interlobar fissure.See this figure below:

Small Comment:
Most commonly develops in alcoholics and in elderly patients with chronic pulmonary disease. Unlike acute pneumococcal pneumonia, Klebsiella pneumonia causes frequent and rapid cavitation, and there is a much greater incidence of pleural effusion and empyema.

For Comparison with pneumococcal pneumonia :

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General Ultrasound in the Critically

General Ultrasound in the Critically III by Daniel A. Lichtenstein
Publisher: Springer 2007 | ISBN: 3540736239 | PDF | 199 Pages | 14.9 MB

General ultrasound in the critically ill describes a new clinical tool: ultrasound for the intensive care and emergency physician. Written by an intensivist familiar with ultrasound, it specifically details findings of immediate clinical relevance throughout its approx. Through a whole-body approach, this book considers new emergency applications regarding the abdomen, venous system, head, heart, and the most original topic, the lung. Flow charts are proposed to resolve daily intensive care and emergency occurrences: acute dyspnea, shock, unexplained fever, etc. The strong points and pitfalls of ultrasound are reviewed in detail. This book shows just how critical ultrasound has proven to be in satisfying a major concern in the intensive care and emergency medicine fields: speed and accuracy. With this ever-present requirement for rapid diagnosis in mind, General ultrasound in the critically ill provides a key to practicing a visual medicine, a great benefit to the critically ill patient, especially since ultrasound is noninvasive and can be done at the bedside. This volume is not only an exhaustive atlas dealing with the most variable aspects of the critically ill patient, but it is above all a guide, a permanent aid in the therapeutic decision.

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