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Carotid Artery Corrected Flow Time and Inferior Vena Cava Collapsibility Index for Prediction of Hypotension After Induction of General Anesthesia in Geriatric Patients Undergoing Elective Surgery

NCT06814054 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 189

Last updated 2025-07-01

No results posted yet for this study

Summary

In this observational study, we will assess cFT by Carotid ultrasound and IVC collapsibility index for prediction of hypotension after induction of general anesthesia in geriatric patients undergoing elective surgery.

Conditions

  • Geriatrics
  • Hypotension on Induction
  • General Anesthetic Drug Adverse Reaction
  • Elective Surgery

Interventions

DIAGNOSTIC_TEST

Carotid Artery Corrected Flow Time measurement

* The cFT is defined as the time between the onset of systolic flow until closure of the aortic valve corrected for the HR and has been found to correlate with the intravascular volume. * carotid ultrasound imaging will be performed 10 minutes before induction of general anesthesia in the preoperative holding area. * Ultrasound measurements will be performed under a vascular setting with a 6.0 to 13.0MHz linear array transducer * The right common carotid artery cFT will be measured in supine position with their heads tilted 30° to the left * After that, a pulse wave Doppler will be chosen, and the sampling frame will be positioned at an angle of less than 60° in the region of the carotid artery with the best color flow to acquire the blood flow spectrum.

DIAGNOSTIC_TEST

Inferior vena cava collapsibility index

* The IVC will be examined while the patient has been spontaneously, quietly breathing and lying in the supine position for at least 5 min before assessment. * A two-dimensional image of the IVC as it entered the right atrium will be obtained through the paramedian long-axis view via a subcostal approach using a curvilinear phased array probe (2-5 MHz) * Then, using M-mode imaging produced at a medium sweep speed, changes in IVC diameter with breathing will be evaluated 2 to 3 cm distal to the right atrium. * During the same respiratory cycle, measurements will be made of the IVC's greatest expiratory diameter (dIVC expiration) and lowest inspiratory diameter (dIVC inspiration). The formula IVCCI = (dIVC expiration - dIVC inspiration) × 100/dIVC expiration will be used to determine IVCCI as a percentage. (12) * IVCCI will be assessed by the same trained anesthesiologist who was blinded to postin duction hemodynamic measurements.

Sponsors & Collaborators

  • Tanta University

    lead OTHER

Principal Investigators

  • tarek Mostafa · tanta university, faculty of medicine

Eligibility

Min Age
65 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-03-01
Primary Completion
2026-04-30
Completion
2026-05-31

Countries

  • Egypt

Study Locations

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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 NCT06814054 on ClinicalTrials.gov