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miércoles, 2 de noviembre de 2016

Pulse oximetry

PulmCrit (EMCrit)
PulmCrit - November 2, 2016 - By Josh Farkas
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"For patients with an adequate oximetry waveform, pulse oximetry is usually superior to ABG for measuring oxygenation. 
The top ten reasons for this are:
  1. Saturation is a more direct measurement of tissue oxygen delivery than PaO2.
  2. ABG is a painful and expensive test.
  3. One ABG typically leads to a cascade of ABGs, multiplying costs and blood loss.
  4. ABGs may be contaminated with venous blood.
  5. Point-of-care ABG monitors calculate oxygen saturation, rather than measuring it directly.
  6. Obtaining an ABG may delay management.
  7. PaO2 values are easily misunderstood.
  8. Measuring the A-a gradient is over-utilized and potentially misleading.
  9. ABG only measures oxygenation at a single time point.
  10. Changes in PaO2 are widely misinterpreted."