Abstract
Preoperative fasting can also lead to physiological deleterious effects such as dehydration, and hypovolemia. The Plethysmographic Variability Index (PVI, Masimo Corp, Irvine, CA, USA), is a dynamic measurement and its variability could be related to hydration status. Objective: Find a correlation between the number of hours of preoperative fasting and the measurements of PVI. Studio and design: Experimental, prospective, longitudinal. Material and methods: During one-year, patients ASA I scheduled for elective general anesthesia, in an outpatient plastic surgery clinic, the nurse staff recorded PVI (%) values by MightySat® Masimo finger oximeter pulse and the hours of fasting carried out the night before their admission by direct interrogation of the patient. a simple linear regression with Pearson correlation coefficient, perfect = 1, to find a relation between fasting hours and PVI, being considered significant with a p< 0.05. Results: 140 patients were included, women (90%), mean age 35 years, the mean PVI values were 21.01 (SD +/- 7.20) means hours of preoperative fasting performed by patients 11.85 (SD+/- 2.34). Pearson correlation coefficient between fasting hours and PVI was 0.005 (t-student 0.0054, p bilateral 0.47) Conclusion: This study did not show a linear relation, direct or inverse, between fasting hours and PVI values. PVI as a dynamic measurement of preload or stroke volume did not show changes in terms of fasting time in our patients.
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More From: Journal of Anesthesia and Critical Care: Open access
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