[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"noninvasive-hemoglobin-monitoring\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:noninvasive-hemoglobin-monitoring":25},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":11,"sex":16,"minAge":17,"maxAge":4,"enrollmentInfo":18,"targetDuration":4,"studyType":21,"phases":4,"briefSummary":22,"conditions":23,"keywords":26,"overallStatus":32,"whyStopped":4,"lastUpdateSubmitDate":33,"lastUpdatePostDateStruct":34,"startDateStruct":37,"completionDateStruct":38,"leadSponsor":40,"locationsCount":5},"100656236","effect-of-prone-position-on-continuous-noninvasive-hemoglobin-measurement-100656236",false,"NCT07823569","Effect of Prone Position on Continuous Noninvasive Hemoglobin Measurement","Does the Prone Position Affect Continuous Noninvasive Hemoglobin Measurement?","Inclusion Criteria:\n\n* Age 18 years or older\n* American Society of Anesthesiologists (ASA) physical status I-III\n* Scheduled to undergo lumbar stabilization surgery under general anesthesia\n* Provision of written informed consent for participation in the study\n\nExclusion Criteria:\n\n* Refusal to participate in the study\n* ASA physical status IV-V\n* Hemoglobin level \\\u003C10 g\u002FdL\n* Presence of peripheral arterial disease","ALL","18 Years",{"count":19,"type":20},80,"ESTIMATED","OBSERVATIONAL","This prospective observational study aims to evaluate whether the prone position affects the agreement between noninvasive hemoglobin (SpHb) measurements and laboratory hemoglobin values in patients undergoing lumbar stabilization surgery under general anesthesia.\n\nSpHb provides continuous, noninvasive monitoring of hemoglobin using multi-wavelength pulse CO-oximetry. However, its accuracy may be affected by changes in peripheral perfusion, hemodynamic status, and patient position. The prone position used during spine surgery may alter cardiovascular function and peripheral perfusion and may therefore influence SpHb measurements.\n\nIn this study, SpHb values obtained in the supine and prone positions will be compared with simultaneously obtained laboratory hemoglobin values. The study will also evaluate the ability of SpHb to follow changes in hemoglobin during surgery. The results may help clarify the clinical usefulness of continuous noninvasive hemoglobin monitoring during surgery performed in the prone position.",[24,25],"Lumbar Stabilization Surgery","Noninvasive Hemoglobin Monitoring",[27,25,28,29,30,31],"Prone Position","SpHb","Laboratory Hemoglobin","Pulse CO-Oximetry","Perioperative Monitoring","RECRUITING","2026-09-11",{"date":35,"type":36},"2026-09-16","ACTUAL",{"date":33,"type":36},{"date":39,"type":20},"2026-12-31",{"name":41,"class":42},"Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital","OTHER"]