Clinical trials

This prospective observational cohort study will evaluate maternal and fetal blood gas parameters in women undergoing cesarean delivery under spinal or general anesthesia. Maternal venous blood samples will be obtained immediately before anesthesia induction, and umbilical arterial blood samples will be obtained after delivery and cord clamping. Blood gas parameters, including pH, pCO2, pO2, bicarbonate, base excess, lactate, and fetal carboxyhemoglobin levels, will be compared between the spinal and general anesthesia groups. The study will also evaluate maternal-fetal blood gas gradients, Apgar scores, neonatal intensive care requirements, and the relationship between smoking exposure and fetal carboxyhemoglobin levels.

Overactive bladder (OAB) is associated with systemic chronic inflammation. Indices derived from complete blood count (such as neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and systemic immune-inflammation index (SII)) have shown associations with OAB presence. However, whether baseline inflammatory status predicts response to beta-3 adrenergic agonist therapy remains untested. This prospective observational cohort study evaluates the predictive ability of baseline NLR, PLR, and SII for 3-month treatment response to mirabegron 50 mg in women with OAB.

This prospective, single-center observational study will evaluate the performance of an artificial intelligence (AI)-based automated image-analysis method that will be developed, internally tested, and locked before prospective enrollment. The method will estimate the position of totally implantable venous access port catheter tips in adults undergoing right internal jugular vein port implantation as part of routine care. The automated estimate will be compared with a prespecified manual measurement method. Reference measurements of the catheter tip and the cavoatrial junction will be obtained from clinically indicated chest computed tomography images when both structures are visible. No additional chest radiography or computed tomography will be performed for research purposes, and the automated output will not guide catheter placement or alter clinical decisions. The primary performance measure will be the mean absolute error of the automated estimate in the prospective cohort.

Study Description (For Patients, Families, and Healthcare Providers) Purpose: The aim of this study is to evaluate the effectiveness and safety of methotrexate treatment in women with ectopic pregnancy who belong to a group for whom this treatment is relatively contraindicated. Background: Methotrexate is a medication commonly used in the treatment of ectopic pregnancy (a pregnancy that occurs outside the uterus, usually in the fallopian tube). However, in certain conditions - such as kidney or liver dysfunction - methotrexate use may carry increased risks. These situations are known as relative contraindications. This study will retrospectively examine treatment outcomes in this specific patient population. Method: The study will analyze medical records of patients who were previously treated with methotrexate for ectopic pregnancy. No new interventions will be performed. The analysis will be based solely on existing clinical data. Why Is This Important? The findings of this study may help us better understand the safety limits of methotrexate therapy and guide healthcare providers in managing similar cases in the future.

The optic nerve sheath is a continuation of the dura mater, extending along the subarachnoid space surrounding the optic nerve. Consequently, changes in intracranial pressure cause an augmentation or contraction in the diameter of the optic nerve sheath, which is coreleted with intracranial pressure. Participants undergoing lower extremity operations (ankle, distal tibia and fibula surgeries) using a tourniquet under spinal anesthesia will be investigated. Spinal anesthesia will be performed with a 25 G Whitacre, 25 G Quincke, or 27 G Quincke needle, depending on the study group. Optic nerve sheath diameter (ONSD) measurements will be performed before spinal anesthesia; and 5 minutes, 15 minutes,,24 hours after spinal block, respectively.The 4th measurement will be performed after tourniquet is opened. Measurements will be done with 15 MHz linear ultrasound (US) probe in B mode, 3 mm behind the posterior globe in the transverse plane from both eyes, on upper eyelid. Values will be recorded numerically. The impact of spinal anesthesia administered using various needle designs (Quincke and Whitacre) and sizes (25G-27G) on intracranial pressure will be investigated.