Spinal anesthesia is commonly used in transurethral prostate resection (TUR-P) surgeries; however, post-spinal hypotension remains a frequent and clinically significant complication, particularly in elderly patients. Early prediction of hypotension may allow timely interventions and improve patient safety.
This prospective observational study aims to evaluate the predictive value of preoperative ultrasound-based inferior vena cava collapsibility index (IVC-CI) and femoral vein collapsibility index (FVCI) for post-spinal hypotension in patients undergoing elective TUR-P under spinal anesthesia. Before spinal anesthesia, IVC and femoral vein measurements will be obtained using ultrasonography. Hemodynamic parameters will be recorded before and after spinal anesthesia, and the occurrence of hypotension will be assessed according to predefined criteria.
The study seeks to compare the diagnostic performance of IVC-CI and FVCI in predicting post-spinal hypotension and to identify potential clinical predictors associated with hypotension in this patient population.
Adult patients aged 18-75 years
American Society of Anesthesiologists (ASA) physical status I-III
Scheduled for elective transurethral resection of the prostate (TUR-P)
Planned spinal anesthesia
Refusal to participate in the study
Body mass index (BMI) >30 kg/m²
Use of angiotensin-converting enzyme inhibitors or angiotensin receptor blockers
Emergency surgery
The study population consists of adult male patients aged 18-75 years with American Society of Anesthesiologists (ASA) physical status I-III who are scheduled to undergo elective transurethral resection of the prostate (TUR-P) under spinal anesthesia. All participants will be recruited from a single tertiary care center. Patients will be evaluated preoperatively, and eligible individuals who provide written informed consent will be included in the study.
Cohort
Prospective
Not listed
Prediction of Post-Spinal Hypotension Using Inferior Vena Cava and Femoral Vein Collapsibility Indices
The primary outcome is the predictive value of the inferior vena cava collapsibility index (IVC-CI) and femoral vein collapsibility index (FVCI) for the development of post-spinal hypotension. Hypotension is defined as a systolic blood pressure \<90 mmHg, a decrease in systolic blood pressure \>30% from baseline, or a mean arterial pressure \<60 mmHg within 15 minutes after spinal anesthesia.
Comparison of Diagnostic Performance of IVC-CI and FVCI for Post-Spinal Hypotension
Comparison of the diagnostic performance of inferior vena cava collapsibility index (IVC-CI) and femoral vein collapsibility index (FVCI) for predicting post-spinal hypotension using predefined hypotension criteria.
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