Ultrasound could help doctors track blood loss during spine surgery
NCT ID NCT07549165
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether a simple ultrasound test can help doctors monitor blood volume changes in patients having lower back surgery. About 128 adults will have their blood vessels measured before, during, and after surgery. The goal is to find a non-invasive way to predict drops in blood pressure and improve patient safety.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 128 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2026
- Expected to finish
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Jul 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Adult patients (≥18 years) scheduled for elective lumbar spine stabilization surgery under general anesthesia at Trabzon University Faculty of Medicine Hospital will be included in this study. All participants will be classified as ASA physical status I-II-III and will undergo surgery in the prone position. Inferior vena cava (IVC) diameter and collapsibility index will be measured using ultrasonography at predefined perioperative time points.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
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
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Trabzon University Faculty of Medicine Kanunı Training and Research Hospital ,Trabzon
RECRUITINGTrabzon, 61080, Turkey (Türkiye)
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Trabzon University Faculty of Medicine, Kanuni Training and Research Hospital
RECRUITINGTrabzon, 61080, Turkey (Türkiye)
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