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50 result(s) for "ARSLAN, H. Hüseyin"
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Clinical spectrum of primary hemophagocytic lymphohistiocytosis: experience of reference centers in Central and Southeast Anatolia
Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening disease, with a high mortality if left untreated. In addition, the disease has unique diagnostic challenges. Therefore, despite the existing guidelines on management, current clinical practice data is informative on the course and outcome. Herein, a retrospective chart review study was conducted through the collaboration of six centers, located in central and southeastern Türkiye. The demographical data, laboratory results, and treatment outcomes were evaluated. Eighty-three patients were enrolled in the study. The mean age was 2 years, whereas the median age was 8 months with a range of a minimum of 1 week and a maximum of 12.6 years. Consanguineous marriage, history of sibling death, and familial history of similar disease were determined in 72.2% (n:60), 34.9% (n:29), and 39.8% (n:33) of the patients, respectively. The most common presentation was fever, followed by hepatosplenomegaly on admission. Disease-causing familial HLH variants were identified in 60.2% (n:50) of the patients. Hematopoietic stem cell transplantation (HSCT) was performed in 39.7% (n:33) of the cohort. The 2-year overall survival (OS) rate was 62.4% for the whole group. Comparing the patients who received HSCT and those who did not; the HSCT group had a 2-year OS of 84.7%, which was significantly better than patients who did not receive HSCT had a 2-year OS of 47.1% (p:0.001). Despite the improvement in HLH diagnostics and treatment options over the last decade, early death remains a leading problem for the survival of these patients. Therefore, appropriate assessment of the patients in experienced centers and HSCT are pivotal for better outcomes.
The effect of spinal versus general anesthesia on intraocular pressure in lumbar disc surgery in the prone position: A randomized, controlled clinical trial
To compare IOP changes between spinal anesthesia (SA) and general anesthesia (GA) in patients who underwent lumbar disc surgery in the prone position. Prospective, randomized, controlled trial. Operating room. Forty ASA I–II patients scheduled for lumbar disc surgery in prone position. Patients were randomly allocated to the SA or GA groups. IOP was measured before anesthesia (IOP1), 10 min after spinal or general anesthesia in supine position (IOP2), 10 min after being placed in the prone position (IOP3), and at the end of the operation in the prone position (IOP4). There was no significant difference between baseline IOP1 (group GA = 19.4 ± 3.2 mmHg; group SA = 18.6 ± 2.4 mmHg) and IOP2 values (group GA = 19.7 ± 4.1 mmHg; group SA = 18.4 ± 1.9 mmHg) between and within the groups. IOP values after prone positioning and group GA measurements (IOP3 = 21.6 ± 3.1 mmHg; IOP4 = 33.9 ± 3.1 mmHg) were significantly higher when compared with the SA group (IOP3 = 19.3 ± 2.7 mmHg, IOP4 = 26.9 ± 2.4 mmHg) (p = 0.018 and p < 0.001, respectively). Furthermore, IOP3 was significantly increased when compared with IOP2 in the GA group but not in the SA group (p = 0.019 and p = 0.525, respectively). In both groups, IOP4 values were significantly higher than the other three measurements (p < 0.001). The results indicated that IOP increase is significantly less in patients who undergo lumbar disc surgery in the prone position under SA compared with GA. •Intraocular pressure increases in prone position under general anesthesia.•We investigate the effects of spinal anesthesia and general anesthesia on intraocular pressure.•Spinal anesthesia decreases intraocular pressure increase compared to general anesthesia.
Does Maintaining a Targeted Abdominal Perfusion Pressure Reduce Renal Damage in Patients with Septic Shock?: A Randomized, Controlled, and Open-label Study
Increased intra-abdominal pressure (IAP) in patients admitted to the intensive care unit leads to reduced abdominal perfusion pressure (APP), causing circulatory insufficiency and organ failure. To investigate the effect of maintaining a targeted APP on renal injury and the effect of increased IAP on the mortality rate in patients with septic shock. Randomized, controlled, open-label study. A total of 72 patients were randomly divided into two groups (MAP65 or APP60). The MAP target for patients in the MAP65 group (n = 36) was 65 mmHg according to the Surviving Sepsis Guidelines. In the APP60 group (n = 36), the target APP was set to > 60 mmHg. The glomerular filtration rate (GFR), inotrope consumption, and IAP were recorded daily. The need for renal replacement therapy, decrease in GFR, and 30- and 90-day mortality rates were compared between the two groups. In both the groups, the IAP was statistically similar ( = 0.458). The decreased in GFR was similar in both groups during the first 2 days. From day 3, there was a more statistically significant rapid decline in GFR in the MAP65 group than in the APP60 group. The GFR p-values on the 3 , 4 , and 5 days were 0.040, 0.043, and 0.032, respectively. Eight patients (22.2%) in the MAP65 group and three patients (8.3%) in the APP group required renal replacement therapy ( = 0.101). The 30-day mortality rates in the MAP65 and APP60 groups were 61.1%, and 47.7%, respectively ( = 0.237). The 90-day mortality rates in the MAP65 and APP60 groups were 66.7% and 66.7%, respectively ( = 1). Setting an APP target limited the reduction in GFR. The mortality rates were similar in the two groups and there was no difference in the rate of end-stage renal failure between the groups.
Protective Effects of Bosentan via Endothelin Receptor Antagonism in Experimental Ischemia-Reperfusion Injury in the Lower Limb of Rats
This study aimed to evaluate the protective effects of bosentan, a dual endothelin receptor antagonist, against skeletal muscle ischemia-reperfusion injury (IRI) in rats. A total of 24 male Wistar Albino rats were divided into four groups: control (C, n=6), bosentan-treated (B, n=6), ischemia-reperfusion (IR, n=6), and bosentan plus ischemia-reperfusion (B+IR, n=6). Bosentan (10 mg/kg) was administered 30 minutes prior to reperfusion. In the IR and B+IR groups, ischemia was induced using vascular bulldog clamps for 45 minutes, followed by 120 minutes of reperfusion. Histological and biochemical assessments revealed significant differences among the groups. The disorganization and degeneration scores of the muscle cells in the B+IR group were significantly lower than those in the IR group (P = 0.001). The degree of interstitial edema in the IR group was markedly more severe than in the C and B groups (all P < 0.001), while the interstitial edema score in the B+IR group was significantly lower than that in the IR group (P < 0.001). The total muscle injury scores were markedly reduced in the B+IR group compared to the IR group (P < 0.001). Biochemically, TAS levels were significantly higher in the B+IR group compared to the IR group (1.03 ± 0.18 vs 0.59 ± 0.10 mmol/L, P = 0.016). Conversely, TOS (1.97 ± 0.39 vs 2.86 ± 0.43 IU/mg, P < 0.001) and OSI levels (P < 0.001) were significantly lower in the B+IR group. Additionally, paraoxonase (PON-1) enzyme activity was significantly reduced in the B+IR group compared to the IR group (P < 0.001). These findings suggest that bosentan exerts its protective effects by antagonizing endothelin-1 receptors, thereby mitigating vasoconstriction, oxidative stress, and inflammation. The observed reductions in muscle cell disorganization, interstitial edema, hemorrhage, neutrophil infiltration and oxidative stress markers underscore bosentan's potential as a therapeutic agent for managing ischemia-reperfusion injury. Bosentan demonstrates significant protective effects against skeletal muscle IRI by reducing oxidative stress and inflammation through endothelin receptor antagonism. These findings underscore bosentan's potential as a therapeutic agent for mitigating ischemia-reperfusion injury in vascular surgeries and managing critical limb ischemia in clinical settings. Further research is warranted to explore the long-term effects of bosentan on muscle recovery and systemic health following ischemia-reperfusion injury.
Ozone Administration Reduces Myocardial Ischemia Reperfusion Injury in Streptozotocin Induced Diabetes Mellitus Rat Model
This study aimed to demonstrate whether ozone has cardioprotective effects on the myocardial ischemia-reperfusion injury (IRI) in rats with streptozotocin(STZ)-induced diabetes. A total of 38 male Wistar Albino rats were divided into five groups as follows: control group (group C, =6), diabetic group (group D, =6), diabetic ozone group (group DO,n=6), diabetic-ischemia/reperfusion (group DIR, =6), diabetic-ischemia/reperfusion-ozone (group DIRO, =6). Six rats died during this period and two died because of surgical complications. A myocardial ischemia-reperfusion model was created using a thoracotomy incision from 4th intercostal space. The LAD was ligated using an 8-0 prolene suture for 30min. Ozone was administered intraperitoneally(1mg/kg) 5min before reperfusion. The reperfusion time was 120 min. At the end of the reperfusion procedure, myocardial tissue histopathological examinations, and serum biochemical analyses were performed. The percentage of TUNEL(+) cardiomyocytes/HPF was significantly higher in the DIR group than in the C, D, and DO groups. Conversely, TUNEL positivity was significantly lower in the DIRO group than in the DIR group. The IRI score was significantly higher in the DIR and DIRO groups than that in the C, D, and DO groups. In contrast, the IRI damage score in the DIRO group was significantly lower than that in the DIR group. Serum MDA levels were significantly higher in the DIR group than in the C, D, and DO groups. Similarly, MDA levels were significantly higher in the DIRO group than in the C and D groups. CAT activity was significantly higher in the DIR group than in the C and D groups. SOD activity was significantly higher in the DIR group than in the C and DO groups. Our study showed that ozone exerts cardioprotective effects in STZ-induced diabetic rats through its antioxidant role against oxidative stress. Both biochemical and histological analyses clearly revealed that ozone has beneficial effects against IRI in the diabetic rat myocardium.
Effect of calcium hydroxide mixed with lidocaine hydrochloride on postoperative pain in teeth with irreversible pulpitis and symptomatic apical periodontitis: a preliminary randomized controlled prospective clinical trial
Objectives To investigate the effect of calcium hydroxide mixed with lidocaine HCl on postoperative spontaneous pain. Materials and methods Sixty patients having irreversible pulpitis and symptomatic apical periodontitis with a preoperative spontaneous pain and percussion pain which was more than 50 on a visual analogue scale (100 mm VAS) were included in this study. After the preparation of the root canals, the patients were randomly distributed into two groups according to the calcium hydroxide vehicle, control group (mixed with saline) and calcium hydroxide mixed with lidocaine HCl ( n  = 30). Postoperative spontaneous pain scores were recorded by a VAS every day for a week. Data were analysed using one-way analysis of variance, chi-squared test and Mann-Whitney U tests ( p  = 0.05). Results The calcium hydroxide mixed with lidocaine HCl group resulted in significantly less pain compared with the calcium hydroxide mixed with saline group during days 1 to 4 ( p  < 0.05). There were no significant differences between the groups in terms of postoperative percussion pain levels ( p  > 0.05). Conclusion Within the limitations of this study, it can be concluded that the calcium hydroxide mixed with lidocaine HCl can be beneficial in reducing postoperative pain in teeth with irreversible pulpitis and symptomatic apical periodontitis. Clinical relevance The calcium hydroxide mixed with lidocaine HCl can be beneficial in reducing postoperative pain in teeth with irreversible pulpitis and symptomatic apical periodontitis. Clinical registration number TCTR20181121003
Coupled Fixed Point Theorems for Contractive Mappings Involving New Function Classes and Applications
The aim of this paper is to introduce the notions ofα-(𝓕,H)-(φ,ψ) andμ-(𝓕,H)-(φ,ψ) contractions and present several coupled fixed point theorems for this type of contractions in the set of ordered metric spaces. Several examples are offered to illustrate the validity of the obtained results. As an application, the existence of a solution of Fredholm nonlinear integral equations are also investigated.
Hyaluronan and N-ERC/Mesothelin as Key Biomarkers in a Specific Two-Step Model to Predict Pleural Malignant Mesothelioma
Diagnosis of malignant mesothelioma is challenging. The first available diagnostic material is often an effusion and biochemical analysis of soluble markers may provide additional diagnostic information. This study aimed to establish a predictive model using biomarkers from pleural effusions, to allow early and accurate diagnosis. Effusions were collected prospectively from 190 consecutive patients at a regional referral centre. Hyaluronan, N-ERC/mesothelin, C-ERC/mesothelin, osteopontin, syndecan-1, syndecan-2, and thioredoxin were measured using ELISA and HPLC. A predictive model was generated and validated using a second prospective set of 375 effusions collected consecutively at a different referral centre. Biochemical markers significantly associated with mesothelioma were hyaluronan (odds ratio, 95% CI: 8.82, 4.82-20.39), N-ERC/mesothelin (4.81, 3.19-7.93), CERC/mesothelin (3.58, 2.43-5.59) and syndecan-1 (1.34, 1.03-1.77). A two-step model using hyaluronan and N-ERC/mesothelin, and combining a threshold decision rule with logistic regression, yielded good discrimination with an area under the ROC curve of 0.99 (95% CI: 0.97-1.00) in the model generation dataset and 0.83 (0.74-0.91) in the validation dataset, respectively. A two-step model using hyaluronan and N-ERC/mesothelin predicts mesothelioma with high specificity. This method can be performed on the first available effusion and could be a useful adjunct to the morphological diagnosis of mesothelioma.