An observational study in Respiratory Mechanics, sponsored by Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey. Not yet recruiting. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2026-07-23.
Sponsored by Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey · Observational
This prospective observational study aims to evaluate the association between preoperative abdominal subcutaneous fat thickness measured by ultrasonography and intraoperative driving pressure in adult patients undergoing elective spinal surgery in the prone position under general anesthesia. Anthropometric measurements including body mass index, waist circumference, waist-to-height ratio, and neck circumference will also be evaluated for their association with respiratory mechanics. No additional intervention beyond routine clinical care will be performed.
Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey is the lead sponsor of 108 studies on the registry; 31 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Adult patients undergoing elective spinal surgery in the prone position under general anesthesia at a single tertiary care hospital.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Adults aged 18 years or older Elective spinal surgery General anesthesia Prone position I-III 18.5-39.9 kg/m²
Exclusion Criteria:
Emergency surgery Pregnancy Severe restrictive or obstructive pulmonary disease Hemodynamic instability \<18.5 or ≥40 kg/m² Incomplete study measurements
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
ASA physical status
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Adult patients undergoing elective spinal surgery in the prone position under general anesthesia. Preoperative ultrasonographic abdominal subcutaneous fat thickness and intraoperative respiratory mechanics will be evaluated.
Intraoperative Driving Pressure
Time frame: 10 minutes after prone positioning, before surgical manipulation
No study locations are listed for this record.
Plan to share: Undecided
No publications or documents are linked to this record.
Start is estimated for Jul 2026; primary completion for Nov 2026, 4 months later.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey →