This prospective observational study aims to evaluate the predictive performance of preoperative Shock Index (SI) and Modified Shock Index (MSI) for hypotension following spinal anesthesia in elective cesarean surgery. Post-spinal hypotension is a common complication that can affect maternal and fetal outcomes, and early identification of at-risk patients is essential for effective perioperative management.
Eligibility
Sex
FEMALE
Min age
18 Years
Max age
—
Healthy volunteers
No
Inclusion Criteria:
* Patients over 18 years old
* ASA II-III patients undergoing elective cesarean section
Exclusion Criteria:
* ASA IV patients
* Patients with known neurologic or psychiatric disorders
* Patients with clinically significant cardiovascular, respiratory, hepatic, renal or metabolic disease
* Patients with alcohol or drug addiction
* Mentally disabled patients
* Patients with BMI\>30
* Patients who develop massive bleeding or coagulopathy
Primary outcome measure(s)
Predictive performances of preoperative shock indexes for intraoperative hypotension — From induction of spinal anesthesia until end of surgery The ability of preoperative SI and MSI to predict intraoperative hypotension will be evaluated using receiver operating characteristic (ROC) analysis; area under the curve (AUC), sensitivity, specificity, and optimal cutoff values will be reported. SI is calculated as heart rate ÷ systolic blood pressure (HR/SBP); MSI is calculated as heart rate ÷ mean arterial pressure (HR/MAP). Hypotension is defined as a decrease of SBP to \<80% of baseline or SBP \<100 mmHg, or MAP \<80% of baseline or MAP \<65 mmHg.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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