NCT07496788

Investigation of the Role of Internal Jugular Vein Collapsibility Index in Predicting Spinal Anesthesia-Induced Hypotension in Preeclamptic Parturients

• Status: Not Yet Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 96 (estimated)
• Sponsor: Ankara City Hospital Bilkent · Academic / Other
• Sex: Female
• Age: 18 Years – 45 Years
• Healthy volunteers: Not accepted

Summary

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.

Detailed description

This prospective, single-center observational study is designed to evaluate the predictive value of the internal jugular vein collapsibility index (IJVCI) for spinal anesthesia-associated hypotension in preeclamptic parturients undergoing cesarean delivery classified as Lucas category 3-4. Eligible patients aged 18-45 years with ASA physical status II-III and singleton pregnancies at ≥28 weeks of gestation will be enrolled. Preoperative ultrasonographic measurements of the right internal jugular vein will be performed to calculate IJVCI using M-mode imaging. Maximum and minimum diameters during spontaneous and deep respiration will be recorded. Spinal anesthesia will be performed with hyperbaric bupivacaine. Hemodynamic parameters (systolic, diastolic and mean arterial pressure, heart rate, and oxygen saturation) will be monitored with blood pressure measurements every 2 minutes during the first 20 minutes and then every 5 minutes thereafter. Hypotension will be defined as a ≥30% decrease in mean arterial pressure from baseline or systolic blood pressure \<100 mmHg. Hypotension will be treated according to the study protocol with ephedrine boluses as needed. The primary outcome is the incidence of spinal anesthesia-associated hypotension within the first 20 minutes after spinal anesthesia. Secondary outcomes include total ephedrine consumption, number and duration of hypotensive episodes, estimated blood loss, and neonatal outcomes (Apgar scores). The diagnostic performance of IJVCI will be evaluated using receiver operating characteristic (ROC) curve analysis.

Conditions

• Spinal Anesthesia-Induced Hypotension
• Preeclampsia
• Cesarean Section

Interventions

Type	Name	Description
OTHER	Internal Jugular Vein Collapsibility Index Measurement	Preoperative 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.

Timeline

• Start date: 2026-05-01
• Primary completion: 2026-07-25
• Completion: 2026-07-25
• First posted: 2026-03-27
• Last updated: 2026-03-27

Locations

1 site across 1 country: Turkey (Türkiye)