IVC collapsibility monitoring during lumbar stabilization surgery

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This prospective observational study uses bedside ultrasonography to measure IVC diameter and calculate the IVC collapsibility index at predefined perioperative time points in adults having elective lumbar stabilization under general anesthesia in the prone position. Measurements will be taken preoperatively, after induction of anesthesia, and before extubation, with additional intraoperative timing as feasible. Routine hemodynamic data such as blood pressure and heart rate will be recorded in parallel. The IVC diameter and collapsibility index will be analyzed to track intravascular volume changes across the perioperative period.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Age ≥ 18 years
* Patients classified as ASA physical status I-II-III
* Patients scheduled for elective lumbar spine stabilization surgery under general anesthesia
* Ability to obtain adequate inferior vena cava (IVC) ultrasonographic imaging
* Provision of written informed consent

Exclusion Criteria:

* Age younger than 18 years

  * Emergency surgery
  * American Society of Anesthesiologists (ASA) physical status IV
  * Patients undergoing revision lumbar stabilization surgery
  * Baseline systolic blood pressure \>180 mmHg or \<90 mmHg
  * Heart failure with ejection fraction (EF) \<40%
  * Pulmonary artery pressure (PAP) \>40 mmHg
  * Presence of intra-abdominal mass, ascites, or increased intra-abdominal pressure
  * Body mass index (BMI) \>30 kg/m²
  * Pregnancy
  * Patients with neurological or psychiatric disorders
  * Inability to obtain adequate inferior vena cava (IVC) ultrasonographic imaging
  * Refusal to provide written informed consent

Where it's running

• Trabzon University Faculty of Medicine Kanunı Training and Research Hospital ,Trabzon
  Trabzon, Turkey (Türkiye) Recruiting
• Trabzon University Faculty of Medicine, Kanuni Training and Research Hospital
  Trabzon, Turkey (Türkiye) Recruiting

Study contacts

• Study coordinator: Şeyma Yüksel Ayar, MD
• Email: balseymayuksel@hotmail.com
• Phone: +905395655853

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.