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    Decreased brain-derived neurotrophic factor levels may predict early perioperative neurocognitive disorder in patients undergoing coronary artery bypass surgery: A prospective observational pilot study
    (Elsevier Science Inc, 2021) Miniksar, Okkes Hakan; Cicekcioglu, Ferit; Kilic, Mahmut; Honca, Mehtap; Miniksar, Dilsad Yildiz; Gocmen, Ayse Yesim; Kacmaz, Osman
    Study objective: To determine the prognostic value of the change in intraoperative BDNF (Brain-derived neurotrophic factor) levels during cardiac surgery with cardiopulmonary bypass (CPB) on early perioperative neurocognitive disorder (PND). Design: Prospective observational pilot study. Setting: The study was performed in the Medical Faculty Hospital, from January 2020 to August 2020. Patients: 45 adult patients undergoing elective coronary artery bypass surgery (CABG) with CPB. Interventions: None. Measurements: Cognitive function was evaluated 1 day before and 4 days after the surgery. Serum BDNF levels were measured at four time points (T1: after induction; T2: with aortic cross-clamp; T3: without aortic crossclamp; T4: 4 days after surgery) by enzyme-linked immunosorbent assay. Main results: The incidence of PND was 37.8% four days after surgery. Serum BDNF (T2 and T4) levels were significantly lower in PND group compared to non- PND group (p = 0.003 and p = 0.016, respectively). Moreover, lactate, rSO2 (regional cerebral oxygen saturation), aortic cross-clamp time, CPB duration, and the amount of blood transfusion differed between the groups. Logistic regression analysis identified serum BDNF-T2, age, cross-clamp time, and rSO2-T2 as independent risk factors for PND. Based on the ROC analysis, the area under curve (AUC) of BDNF-T2 concentration for prediction of PND was 0.759 with sensitivity of 71.4% and specificity of 64.7% (p < 0.01). Conclusion: Intraoperative BDNF serum levels may be a useful biomarker in predicting PND in patients undergoing CABG surgery. More comprehensive studies is needed in order to confirm the effect of decreasing intraoperative BDNF serum levels on the development of PND. Trial registration number: NCT04250935 www.clinicaltrials.gov.
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    PROGNOSIS OF GERIATRIC COVID-19 PATIENTS ADMITTED TO INTENSIVE CARE UNIT ACCORDING TO VACCINATION STATUS
    (Turkish Geriatrics Soc, 2022) Aydin, Ahmet; Kacmaz, Osman; Koca, Erdinc; Kutlusoy, Sevgi; Kasapoglu, Umut Sabri; Oterkus, Mesut
    Introduction: As of June 27, 2022, the COVID-19 pandemic has caused over 540 million infections and 6.3 million deaths. We aimed to investigate the effect of the vaccine on the clinical course of elderly patients hospitalized in the intensive care unit and to determine the prognosis of the patients according to their vaccination status. Materials and Methods: The study included 157 patients over the age of 65. Patients were divided into two groups. The first group consisted of patients who were vaccinated with two doses of CoronaVac, and the second group consisted of patients who were not vaccinated. Demographic data of the patients, prehospital clinical frailty scales, Charlson Comorbidity Indexes, APACHE II scores, laboratory values, and patient prognoses were recorded. Results: Of the 157 patients, 93 (59.2%) were female, and the median age was 76 years (65-99). 96 (61.1%) patients were vaccinated and 61 (38.9%) patients were unvaccinated. Patients were grouped as survivors (n=26) and deceased. We found that APACHE II, prehospital clinical frailty scales, and Charlson Comorbidity Indexes scores were higher in patients who died. There was a significant difference between blood lymphocyte and ferritin levels and survival. The 28-day survival rate was higher and intensive care unit overall survival time were longer in the vaccinated group. Conclusions: We observed that the vaccinated patients had higher survival times and lower mortality rates than those who were not vaccinated. We think that it is important to vaccinate elderly patients and that additional doses may be needed.