blood pressure monitoring. how do we measure it?
TRANSCRIPT
Estimate (Guess)
Accuracy of the advanced trauma life support guidelines for predicting systolic blood pressure using carotid, femoral, and radial pulses: observational study. Charles D Deakin, J Lorraine Low
Oscillation• Useful for trends• Can be in error in some situations:• Hyper/hypotension• Elderly with calcified arteries• Atrial Fibrillation
Invasive: Intra-Arterial• When to go deep:• Hypotension/Shock• Hypertensive Emergency• Frequent ABG checks (paralysis)• Hypothermia protocol• Expectant (“you have to swell to heal”)
The Fast Flush Test• Record arterial waveform during several brief flushes• Oscillations after the flush are a reflection of the resonance of
the recording system and of the arterial pressure waveform…the actual physics is beyond me at this point.
• But normal, underdampened and overdampened waveforms all will give a stereotypical oscillation pattern: