This prospective, single-center observational study aims to evaluate the predictive value of the internal jugular vein collapsibility index (IJVCI) for spinal anesthesia-associated hypotension in preeclamptic parturients (gestational age ≥28 weeks) undergoing cesarean delivery classified as Lucas category 3-4. Preoperative IJVCI will be measured using ultrasonography before spinal anesthesia during spontaneous and deep respiration. The incidence of hypotension within the first 20 minutes after spinal anesthesia will be recorded. The diagnostic performance of IJVCI in predicting hypotension will be analyzed.
Age between 18 and 45 years
ASA physical status II-III
Diagnosed with preeclampsia
Scheduled for cesarean delivery under spinal anesthesia with cesarean urgency classified as Lucas category 3-4
Cesarean urgency classified as Lucas category 1-2
Gestational age <28 weeks
ASA physical status ≥ IV
Known renal disease
Pregnant women diagnosed with preeclampsia who are scheduled for cesarean delivery under spinal anesthesia at Ankara Bilkent City Hospital, with cesarean urgency classified as Lucas category 3-4. Eligible participants are aged 18-45 years, have ASA physical status II-III, and have a gestational age ≥28 weeks. Participants will be evaluated for the development of spinal anesthesia-associated hypotension within the first 20 minutes after spinal anesthesia..
Cohort
Prospective
Internal Jugular Vein Collapsibility Index Measurement
Other interventionPreoperative ultrasonographic measurement of the internal jugular vein collapsibility index (IJVCI) performed before spinal anesthesia in preeclamptic parturients (gestational age ≥28 weeks) undergoing cesarean delivery classified as Lucas category 3-4.
Predictive Value of Internal Jugular Vein Collapsibility Index for Spinal Anesthesia-Induced Hypotension
Diagnostic performance of the preoperative internal jugular vein collapsibility index (IJVCI) for predicting spinal anesthesia-associated hypotension within the first 20 minutes after spinal anesthesia, assessed by receiver operating characteristic (ROC) curve analysis. Hypotension will be defined as a ≥30% decrease in mean arterial pressure from baseline or systolic blood pressure \<100 mmHg.
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