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Corrected Carotid Flow Time for Predicting Spinal Anesthesia-induced Hypotension

NCT06905535 · Status: NOT_YET_RECRUITING · Type: OBSERVATIONAL · Enrollment: 50

Last updated 2025-04-09

No results posted yet for this study

Summary

Spinal anaesthesia is a standard technique frequently preferred for caesarean section. However, spinal anaesthesia-induced hypotension remains a critical problem causing undesirable maternal symptoms such as nausea, vomiting and dyspnoea and adverse consequences for umbilical acidosis and the fetus. One of the reasons aggravating hypotension is aortocaval compression of the growing uterus and consequent decrease in preload and stroke volume . Therefore, left lateral tilt position is recommended in pregnant women after the 20th gestational week to prevent supine hypotension. This position decreases uterine compression on the vena cava and increases venous return to the heart and thus stroke volume. Recently, carotid artery Doppler has been used to assess stroke volume. Many studies have shown that carotid corrected flow time increases significantly after expansion of intravascular volume in hypovolaemic patients . In one study, it was reported that the change in carotid artery blood flow time induced by passive leg raising predicts fluid sensitivity in critically ill patients. It has been reported that changes in carotid artery blood flow time against hemodynamic interventions (such as Trendelenburg position) reflect maternal hypovolemic status and distinguish hypovolemic patients with a higher risk of spinal anesthesia-related hypotension. The investigators also think that the left lateral tilt position may increase the corrected carotid flow time by affecting hemodynamics and may differentiate the patient with a high risk of hypotension.

Conditions

Sponsors & Collaborators

  • Selcuk University

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
40 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-04-01
Primary Completion
2025-05-30
Completion
2025-06-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06905535 on ClinicalTrials.gov