Clinical Research Directory

Value of the Time-Weighted Average (TWA) of Mean Arterial Pressure (MAP) and Cerebral Oximetry (rSO₂) as Predictors of Postoperative Tissue Perfusion Impairment in Patients Undergoing Cardiac Surgery

Neurological problems after heart surgery are common and include confusion, memory loss, and difficulty thinking clearly. These issues may appear hours or days after surgery and can negatively affect recovery. During heart surgery, blood flow and oxygen delivery to the brain may decrease, causing changes in blood pressure and cerebral oxygenation. Previous studies suggest that prolonged drops in mean arterial pressure (MAP) or cerebral oxygenation (rSO₂) are linked to worse postoperative outcomes. Continuous monitoring of blood pressure and cerebral oxygenation is standard in cardiac surgery. This study aims to evaluate the duration and severity of intraoperative drops in MAP and cerebral oxygenation. These measures may provide a more accurate assessment of neurological risk than isolated measurements. The primary objective is to determine whether decreases in MAP and cerebral oxygenation, as well as their duration and intensity during surgery, are associated with postoperative neurological complications. This is a prospective, observational study in adult patients undergoing cardiac surgery, with or without cardiopulmonary bypass (CPB). CPB diverts blood through a machine that performs the work of the heart and lungs while the heart is operated on. All patients will receive standard monitoring, including continuous MAP and cerebral oxygenation measurements. No additional interventions will be performed. Neurological status will be assessed using validated clinical scales before and after surgery. Other outcomes include kidney function, ICU and hospital stay length, postoperative complications, and in-hospital mortality. Validating these measures as a predictive tool could enable early identification of patients at higher risk of neurological injury and allow more individualized intraoperative management to reduce morbidity, hospital stay, and healthcare costs.

Preoperative Carotid Doppler Ultrasound Parameters for Prediction of Post-Induction Hypotension in Elective Non-Cardiac Surgery

This prospective observational study aims to evaluate the predictive value of preoperative carotid Doppler ultrasound parameters, including carotid velocity-time integral (carotid VTI) and corrected carotid flow time (ccFT), for post-induction hypotension in adult patients undergoing elective non-cardiac surgery under general anesthesia. Hemodynamic instability during anesthesia induction is a common and clinically important problem associated with adverse perioperative outcomes. Carotid Doppler ultrasonography provides a rapid and non-invasive method for assessing hemodynamic status at the bedside. In this study, carotid Doppler measurements will be performed in the preoperative period and their association with post-induction hypotension will be analyzed. The results of this study may help identify patients at risk for hypotension and improve perioperative hemodynamic management.

Preoperative Cardiac Power Output and P-POSSUM Score

This study aims to investigate the relationship between preoperative Cardiac Power Output (CPO), which reflects the pumping capacity of the heart, and the P-POSSUM score, a widely used surgical risk assessment tool, in patients aged 65 years and older undergoing abdominal surgery. Simple and non-invasive measurements performed in the preoperative period will be used to obtain CPO values and to evaluate whether these measurements are helpful in predicting postoperative morbidity and mortality. No additional procedures beyond routine clinical care will be performed as part of this observational study. The findings of this study may contribute to a more accurate assessment of surgical risk and help improve patient safety in the perioperative period.

Palatal Wound Healing After Free Gingival Graft Surgery

This randomized controlled clinical trial aims to evaluate the effects of topical triamcinolone acetonide application on wound healing and patient-reported outcomes at the palatal donor site following free gingival graft (FGG) surgery. A total of 36 patients with mucogingival deficiencies requiring FGG will be randomly assigned to either a control group receiving a collagen hemostatic sponge or a test group receiving topical triamcinolone acetonide at the donor site. All palatal donor areas will be protected with a periodontal dressing. Clinical assessments will be performed on postoperative days 7, 14, and 30. Wound epithelialization will be evaluated using the hydrogen peroxide bubbling test, while wound healing and scar formation will be assessed using the Landry, Turnbull, and Howley index and the modified Manchester Scar Scale, respectively. Patient-centered outcomes, including postoperative pain, discomfort, analgesic consumption, and oral health-related quality of life, will be assessed using visual analog scales and the Oral Health Impact Profile-14 questionnaire. The findings of this study are expected to provide evidence regarding the potential benefits of topical corticosteroid use in reducing palatal donor site morbidity following FGG surgery.

The Effect of Different Flap Closure Techniques on Postoperative Morbidity in Impacted Third Molar Surgery

1\. ABSTRACT This study is a randomized controlled trial comparing the clinical efficacy and safety of four different flap closure techniques in reducing postoperative morbidity (pain, swelling, trismus, wound healing) and improving patient quality of life (GOHAI) following impacted mandibular third molar extraction. The methods include conventional suturing, sutureless technique, surgical drain, and cyanoacrylate tissue adhesive, which are commonly used in oral surgery practice. The study aims to scientifically evaluate the effects of each method on patients and to determine the most appropriate clinical approach.