RecruitingNCT07399093

Preoperative Evaluation of IVC Collapsibility Index and Caval Aorta Index After Induction of General Anesthesia

Preoperative Evaluation of IVC Collapsibility Index and Caval Aorta Index for Prediction of Hypotension After Induction of General Anesthesia in Patients Undergoing Craniotomy Surgeries

Sponsor

Ain Shams University

Enrollment

36 participants

Start Date

Jan 14, 2024

Study Type

OBSERVATIONAL

Conditions

General Anesthesia Craniotomy Inferior Vena Cava Collapsibility Index Caval Aorta Index Induction

Summary

This study aims to assess the accuracy, repeatability, and reproducibility of preoperative evaluation of Inferior Vena Cava (IVC) collapsibility index and caval aorta index for prediction of hypotension after induction of general anesthesia.

Eligibility

Min Age: 18 YearsMax Age: 40 Years

Inclusion Criteria6

Age from 18 to 40 years.
Both sexes.
Body Mass Index\< 40 kg/m².
American Society of Anesthesiologists (ASA) physical status I, II.
Fasted according to the ASA guidelines: 2 hours for clear fluids, 6 hours after light meal, 8 hours after a full meal with high calorie or fat content.
Scheduled for elective craniotomy surgeries before induction of general anesthesia.

Exclusion Criteria4

Current or recent pregnancy (within 3 months).
Pre-existing cardiac disease or hypertension.
On medications affecting blood pressure \[Beta-blockers (BBs) and calcium channel blockers (CCBs)\] .
Refusing to undergo the study.

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Interventions

OTHERInferior vena cava collapsibility index

Inferior vena cava (IVC) collapsibility index (IVCCI) will be measured. The IVCCI is calculated using the following formula: IVCCI = (maximum IVC diameter - minimum IVC diameter) / maximum IVC diameter \* 100

OTHERCaval Aorta Index

The Inferior vena cava (IVC): Ao index will be derived by taking the ratio of the maximum IVC diameter during expiration and the maximal abdominal aortic diameter during systole. \- The caval aorta index (IVC/Ao) is calculated using the following formula: IVC/Ao index = IVC diameter / aortic diameter.