Browsing by Author "Comez, Mehmet"

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Comparative Investigation of Protective Effects of Metyrosine and Metoprolol Against Ketamine Cardiotoxicity in Rats
(Humana Press inc, 2015) Ahiskalioglu, Ali; Ince, Ilker; Aksoy, Mehmet; Ahiskalioglu, Elif Oral; Comez, Mehmet; Dostbil, Aysenur; Suleyman, Bahadir
This study investigated the effect of metyrosine against ketamine-induced cardiotoxicity in rats and compared the results with the effect of metoprolol. In this study, rats were divided into groups A, B and C. In group A, we investigated the effects of a single dose of metyrosine (150 mg/kg) and metoprolol (20 mg/kg) on single dose ketamine (60 mg/kg)-induced cardiotoxicity. In group B, we investigated the effect of metyrosine and metoprolol, which were given together with ketamine for 30 days. In group C, we investigated the effect of metyrosine and metoprolol given 15 days before ketamine and 30 days together with ketamine on ketamine cardiotoxicity. By the end of this process, we evaluated the effects of the levels of oxidant-antioxidant parameters such as MDA, MPO, 8-OHGua, tGSH, and SOD in addition to CK-MB and TP I on cardiotoxicity in rat heart tissue. The experimental results show that metyrosine prevented ketamine cardiotoxicity in groups A, B and C and metoprolol prevented it in only group C.
İntraoperatif Anestezi İlişkili Mortalite: Bir Yükseköğretim Hastanesinde 10 Yıllık Bir Araştırma
(2021) Comez, Mehmet; Demirkiran, Hilmi
Purpose: This study aimed to determine anesthesia-related mortality and intraoperative mortality (IOM) incidences and the associated risk factors. Material and Methods: The operations between the years of 2010-2019 were retrospectively reviewed. It was found that 87 of 351,930 patients who were anesthetized in the last 10 years died. Each patient who died was recruited into one of the patient/condition-related, surgical-related, or anesthesia-related mortality groups. Patient characteristics were determined as age, gender, ASA PS score, and comorbidities. Surgical procedures were classified as minor/intermediate, major, and major complex. Anesthesia type was recorded. Operative time, the requirement for vasopressor and the invasive monitoring were determined. Results: The incidence of IOM and anesthesia-related mortality were 2.47 and 0.28 per 10,000 patients, respectively. The IOM group had a higher rate of out-of-hours work, surgical emergency, prolonged operative time, high comorbidity rate, high ASA PS score, major complex surgeries, use of VP, and invasive monitoring. Surgical emergency (p: 0.000), use of VP (p: 0.002), and invasive monitoring (p: 0.000) were independent determinants of IOM. Major complex surgeries (p: 0.007), surgical emergency (p: 0.000), use of VP (p: 0.002), and invasive monitoring (0.000) were potentially associated factors in anesthesia-related mortality. Conclusion: The incidence of IOM and anesthesia-related mortality were 2.47 and 0.28 per 10,000 patients, respectively. The fact that anesthesia-related mortality was associated with drug administration is important for the development of preventive measures. Primary prevention may play a key role in reducing the high fatality. These results indicate the need for improving medical perioperative practices in high-risk and emergency patients