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April 8, 2025Anesthesiology

Hypotension Prediction Index Revalidation: Comment

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Why the study?

Does the Hypotension Prediction Index (HPI) algorithm improve the prediction of hypotensive events compared to current mean arterial pressure?

Design

Letter to the editor / commentary

Authors

RMRamakrishna MukkamalaMSMichael P. SchnetzAMAman Mahajan

Discussion

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Overview

Questions HPI's incremental value over MAP monitoring; leaves open need for outcome trials before routine adoption.

Structured PICO

Does the Hypotension Prediction Index (HPI) algorithm improve the prediction of hypotensive events compared to current mean arterial pressure?

P
Population
2,022 patients (based on the discussed Davies et al. study)
I
Intervention
Hypotension Prediction Index (HPI) algorithm
C
Comparator
Current mean arterial pressure (MAP) algorithm
O
Outcome
Prediction of a hypotensive event (mean arterial pressure < 65 mmHg for at least 1 min) within the next 15 minsurrogate

The Hypotension Prediction Index algorithm appears to offer no clinically significant advantage over current mean arterial pressure monitoring for predicting hypotensive events.

Limitations

  • Forward analysis may have overestimated predictive performance by discarding false negatives
  • Inappropriate use of standard deviation for error bars in the presence of outliers
  • R2 value computed without applying a logistic function to MAP

Cite This Study

Mukkamala et al. (2025) studied this question.

synapsesocial.com/papers/6a7563eaf2cd31a1fadc0aa0https://doi.org/10.1097/aln.0000000000005343
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Comparison of Differences in Cohort (Forward) and Case Control (Backward) Methodologic Approaches for Validation of the Hypotension Prediction Index2024 · 41 citations
  2. 2Hypotension Prediction Index Is Equally Effective in Predicting Intraoperative Hypotension during Noncardiac Surgery Compared to a Mean Arterial Pressure Threshold: A Prospective Observational Study2024 · 55 citations
  3. 3Machine-learning Algorithm to Predict Hypotension Based on High-fidelity Arterial Pressure Waveform Analysis2018 · 626 citations
  4. 4Mathematic Coupling of Data1981 · 309 citations
  5. 5Intraoperative Hypotension Prediction: Current Methods, Controversies, and Research Outlook2024 · 21 citations