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Updated: Aug 4, 2025
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Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
Published on: May 30, 2011
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Dyspnea: perfusion index and triage status
Cumhur Murat Tulay1, Ekim Saglam Gurmen2
1Thoracic Surgery Department, Manisa Celal Bayar University School of Medicine, Manisa, Turkey.
Journal of Clinical Monitoring and Computing
|April 2, 2023
Summary
Perfusion index (PI) can aid emergency triage for patients with dyspnea. A PI of 0.9 or below significantly increases the odds of requiring urgent red triage.
Area of Science:
- Emergency Medicine
- Critical Care
- Physiology
Background:
- Dyspnea is a common emergency department complaint.
- Accurate and rapid triage is crucial for effective patient management.
- Perfusion index (PI) offers a non-invasive measure of peripheral circulation.
Purpose of the Study:
- To investigate the correlation between perfusion index (PI) and emergency triage classification in dyspnea patients.
- To compare the utility of PI versus oxygen saturation in emergency triage.
Main Methods:
- Adult patients presenting with dyspnea were enrolled.
- Perfusion index (PI) was measured using the Masimo Radical-7 device upon admission, and at 1 and 2 hours.
- PI and oxygen saturation were compared for their effectiveness in emergency triage.
Main Results:
- A PI cutoff of 0.9 demonstrated significant correlation with triage status (Sensitivity: 79.25%, Specificity: 78.12%).
- Patients with PI ≤ 0.9 had 13.63 times higher odds of receiving a red triage.
- A PI cutoff of 1.1 was identified as optimal for discharge decisions.
Conclusions:
- Perfusion index (PI) is a valuable tool for emergency triage of dyspnea patients.
- PI measurements can assist in prioritizing care and determining disposition in the emergency department.
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