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Идёт набор NCT07399093

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

Наблюдательное Inferior Vena Cava Collapsibility Index Caval Aorta Index Induction

Ориентир для пациента и семьи

Простыми словами

Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.

Что изучают
В протоколе указаны: Inferior vena cava collapsibility index, Caval Aorta Index.
Кому может быть актуально
Состояния в реестре: Inferior Vena Cava, Collapsibility Index, Caval Aorta Index, Induction. Базовые параметры: 18 лет — 40 лет · Все.
Что важно проверить
Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
Где проводится
Египет
Следующий шаг
Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →
Официальное название

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

Обзор

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.

Подробное описание

Post- anesthesia hypotension is of common occurrence, and it hampers tissue perfusion. The magnitude of hypotension is determined by the preoperative volume status, which varies depending on American Society of Anesthesiologists (ASA) physical status, preoperative comorbidities, preoperative medications, and fasting.

General anesthesia causes significant alterations in hemodynamics, as both inhalational and intravenous anesthetics cause bradycardia, decrease in systemic vascular resistance and vasodilatation, and decrease in myocardial contractility, cardiac output and stroke volume, with the absence of surgical stimulus, making induction of anesthesia is the most crucial period at which hypotension occurs.

Due to different definitions of hypotension and diverse patient populations, the effect of volume preload on prevention of hypotension is still controversial. Many recommendations to identified sonographic determination of inferior vena cava (IVC) collapsibility index (IVCCI) as non-invasive, and easy technique for evaluating volume status. Recent guidelines from the American Society of Echocardiography support the general use of IVCCI in assessing volume status.

Вмешательства

  • Другое Inferior 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
  • Другое Caval 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.

Первичные конечные точки

  • Sensitivity of ultrasound guided Aorto-Caval index (IVC-AO) [Срок оценки: 15 minutes post-induction of general anesthesia.]
Вторичные конечные точки (3)
  • Specificity of ultrasound guided Aorto-Caval index (IVC-AO) [Срок оценки: 15 minutes post-induction of general anesthesia.]
  • Sensitivity of inferior vena cava (IVC) collapsibility index [Срок оценки: 15 minutes post-induction of general anesthesia.]
  • Specificity of inferior vena cava (IVC) collapsibility index [Срок оценки: 15 minutes post-induction of general anesthesia.]

Критерии участия

Критерии включения

  • 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.

Критерии исключения

  • 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.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Да

Дизайн исследования

Модель наблюдения
Когортное

Центры проведения

Египет · 1 центр
  • Ain Shams University Hospitals — Cairo

Идентификаторы

NCT: NCT07399093 · FMASU MD08/2024

Первоисточники (государственные реестры)

Открыть это исследование на ClinicalTrials.gov ↗