Welcome to the new Tamingthesru

Same great content - new look - improved search

Jeffery Hill, MD M.Ed 11/9/15 Jeffery Hill, MD M.Ed 11/9/15

Respiratory Monitoring - An Introduction to Pulse Ox and Capnography

First a bit of physics....

Both pulse oximetry and capnometry rely on the Beer-Lambert Law.

In 1760, Johann Heinreich Lambert proved that the absorbance of light through a material is proportional to the thickness of the material.
In 1852, August Beer proved that the absorbance of light through a material is proportional to the concentration of the attenuating substance in the material.

James Summers, MD 10/5/15 James Summers, MD 10/5/15

What is Useful in the ED to Help Diagnose or Rule Out Septic Arthritis?

History

There are many risk factors for septic arthritis including age >80, Diabetes, Rheumatoid Arthritis, recent joint surgery, prosthesis, cellulitis. The absence of risk factors does not make septic arthritis less likely in an acute monoarticular arthritis

Physical

Monoarticular arthritis is often characterized as a warm, painful, swollen joint with limited range of motion. No studies to date have quantified specificity data on the physical exam. Therefore, clinicians must use their own clinical gestalt when interpreting physical exam findings.