Prone Position and Noninvasive Hemoglobin Monitoring in Spine Surgery
Official title: Does the Prone Position Affect Continuous Noninvasive Hemoglobin Measurement?
Run by Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital · NCT07823569 · Data updated 2026-11-12
This study tests whether being in the prone position changes how closely a finger-based hemoglobin monitor (SpHb) matches lab hemoglobin in adults undergoing lumbar stabilization surgery under anesthesia.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 80 (estimated) |
| Sponsor | Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital Academic / other |
| Locations | 1 site (Istanbul, Istanbul) |
| Status | Recruiting |
| Started | September 11, 2026 |
| Main results expected | December 31, 2026 |
| Study ends | December 31, 2026 |
| Registry record updated | September 16, 2026 |
| Trial ID | NCT07823569 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults 18 years or older with ASA I–III scheduled for lumbar stabilization surgery under general anesthesia who consent to participate.
✕Probably not a fit
Patients with ASA IV–V, peripheral arterial disease, or hemoglobin <10 g/dL may not benefit from SpHb monitoring in this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This prospective, single-center observational study will compare SpHb measurements taken in supine and prone positions with laboratory hemoglobin values obtained from blood gas analyses during lumbar stabilization surgery. It will also assess whether SpHb can track intraoperative changes in hemoglobin. Eligible participants are adults (18+) with ASA I–III undergoing the procedure and able to consent. Data collected include intraoperative hemodynamics, blood loss, transfusions, ICU stay, and total hospital stay to evaluate the performance and potential clinical utility of continuous noninvasive hemoglobin monitoring in the prone position.
Why it matters
Potential benefit: If successful, the study could validate SpHb as a reliable continuous monitor during spine surgery, potentially aiding real-time decision-making about blood management.
How similar studies have gone: Prior research suggests SpHb can track hemoglobin trends but accuracy may be influenced by position and perfusion; this study adds prospective data in the prone setting.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age 18 years or older * American Society of Anesthesiologists (ASA) physical status I-III * Scheduled to undergo lumbar stabilization surgery under general anesthesia * Provision of written informed consent for participation in the study Exclusion Criteria: * Refusal to participate in the study * ASA physical status IV-V * Hemoglobin level \<10 g/dL * Presence of peripheral arterial disease
Where it's running
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Sancaktepe Sehit Prof. Dr. Ilhan Varank Training and Research Hospital
Istanbul, Istanbul, Turkey (Türkiye) Recruiting
Study contacts
- Principal investigator: Altuncu — Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital
- Study coordinator: Şule Altuncu, MD
- Email: sancaktepeetikkurul@gmail.com
- Phone: 02166063300
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.