Key result
During brachial artery compression, the systolic pressure threshold for pulse oximeter failure was higher for Nellcor (47.1 mmHg) than for CSI (38.7 mmHg) or Ohmeda (36.0 mmHg) (P<0.05).
Why the study?
At what degree of systolic hypotension do different pulse oximeters fail and recover under various conditions of reduced perfusion?
Population
9 normal male volunteers
Comparison
Testing of three pulse oximeters during induced… vs Comparison among the three different pulse…
Design
Other
Authors
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Device-specific oximeter failure thresholds during hypoperfusion warrant caution in selection; leaves open validation across clinical scenarios.
At what degree of systolic hypotension do different pulse oximeters fail and recover under various conditions of reduced perfusion?
p-value: p=<0.05
Pulse oximeter failure thresholds vary significantly depending on the specific device and the physiological mechanism of reduced perfusion.
Severinghaus et al. (1990) studied Healthy volunteers (n=9). Experimental reduction of right hand perfusion vs. Different oximeters (CSI 504US, Nellcor N-200, Ohmeda 3740) was evaluated on Systolic pressure threshold of oximeter function (p=<0.05). During brachial artery compression, the systolic pressure threshold for pulse oximeter failure was higher for Nellcor (47.1 mmHg) than for CSI (38.7 mmHg) or Ohmeda (36.0 mmHg) (P<0.05).
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