2024, Number 2
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Rev Mex Anest 2024; 47 (2)
Usefulness of the Surgical Pleth Index as a predictor of pain in the postoperative period
Dávila-Zenteno MA, Meza-Ruiz R
Language: Spanish
References: 10
Page: 81-85
PDF size: 249.38 Kb.
ABSTRACT
Introduction: although there are elements to guide intraoperative analgesia, there is no standardized tool that is also a predictor of postoperative pain. Surgical Pleth Index (SPI) could be that diagnostic test.
Objective: to establish a cut-off value for SPI to predict moderate to severe postoperative pain.
Material and methods: 60 patients who underwent elective surgery with balanced general anesthesia were evaluated. The analyzed variables: heart rate, mean arterial pressure and state entropy (SE) were recorded every 2 minutes during the last 10 minutes of surgery and upon awakening. During recovery, postoperative pain was measured using the numerical rating scale (NRS) every 3 minutes for 15 minutes.
Results: the data obtained were analyzed using a ROC curve that revealed an optimal intraoperative cut-off value of 36 SPI, discriminating between patients without pain or mild pain (NRS = 0-3) vs patients with moderate to severe pain (NRS = 4-10) in the postoperative period. For this cut-off value, both the negative predictive value and the positive predictive value were high (80 and 88.7%, respectively).
Conclusions: an SPI value of 36 can be a useful predictor of postoperative pain, with greater effectiveness than the hemodynamic variables analyzed.
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