Are computerized tomography scans being ordered more than necessary?

INTRODUCTION: Computerized tomography (CT) is one of the most common diagnostic imaging methods used in all hospital admissions. The frequency of ordering CT scans has been rapidly increasing since its first use. Due to the X-rays, increased CT scans has been a concerns primarily for patients, and then for healthcare professionals who offer this service. In this study we aim to by determining the number and distribution of all CT scans performed in our hospital prevent the CT demands other than clinical necessity and to decrease the X-ray dose that the society is exposed to. METHODS: Between January 1, 2013 and December 31, 2019, the number of CT scans performed in our hospital was determined according to the departments and compared with the number of patients. RESULTS: While the number of patients admitted to the emergency room (ER) is 30.90% of the total number of patients, the number of CTs performed in ER was 35.92% of the total number of CTs. CT scan was performed in 5.05% of the total number of patients who admitted to the hospital and this figure was 5.88% in ER patients. Changes in the number of CT scans are statistically significant (p<0.005). DISCUSSION AND CONCLUSION: Even though the changes in CT scan numbers were statistically significant, the results were not found to be clinically significant as there was no proportionally increasing demand according to the years. We link this positive result to the measures we have taken

Efficacy of injectable platelet-rich fibrin in the erosive oral lichen planus: a split-mouth, randomized, controlled clinical trial

Objective: Our study compared the effects of injectable platelet-rich fibrin (i-PRF) with those of corticosteroids in the treatment of erosive oral lichen planus (EOLP). Methodology: This split-mouth study included 24 individuals diagnosed histopathologically with bilateral EOLP. One bilateral lesion was injected with i-PRF, whereas the other was injected with methylprednisolone acetate in four sessions at 15-day intervals. Visual analog scale (VAS) for pain and satisfaction, oral health impact profile scale-14, and the lesion size were used. Results: The intragroup comparisons showed a significant decrease in VAS-pain and lesion size in both the i-PRF group (from 81.88±17.74 to 13.33±18.34, and from 4.79±0.41 to 1.88±1.08, respectively) and the corticosteroid group (from 80.21±17.35 to 23.33±26.81, and from 4.71±0.46 to 2.21±1.35, respectively) in the 6th month compared to baseline (p<0.001). Moreover, VAS-satisfaction increased significantly in both the i-PRF group (from 26.67±17.8 to 85.63±16.24) and the corticosteroid group (from 28.33±17.05 to 74.38±24.11) in the 6th month compared to baseline (p<0.001). However, no significant difference in any value occurred in the intergroup comparisons. Conclusion: In patients with EOLP, both methods decreased pain and lesion size similarly, and both increased satisfaction. Therefore, the use of i-PRF may be considered an option in cases refractory to topical corticosteroid therapy. Biochemical and histopathological studies are required to reveal the mechanism of i-PRF action in EOLP treatment

Diagnostic Value of Dynamic Contrast-Enhanced Magnetic Resonance Imaging in the Evaluation of the Biliary Obstruction

Purpose. In this study, our purpose was to investigate the diagnostic efficacy of the dynamic contrast-enhanced magnetic resonance imaging (MRI) method in the patients with bile duct obstruction. Materials and Methods. 108 consecutive patients (53 men, 55 women, mean age; 55.77 ± 14.62, range 18–86 years) were included in this study. All the patients underwent conventional upper abdomen MRI using intravenous contrast material (Gd-DTPA) and MRCP in 1.5 Tesla MRI scanner. MRCP images were evaluated together with the T1 and T2w images, and both biliary ducts and surrounding tissues were examined for possible pathologies that may cause obstruction. Results. MRI/MRCP findings compared with final diagnoses, MRI/MRCP in the demonstration of bile duct obstruction sensitivity 96%, the specificity 100%, and accuracy 96.3%, in the detection of presence and level of obstruction, the sensitivity 96.7%, specificity 100%, and accuracy 97.2%, in the diagnosis of choledocholithiasis, the sensitivity 82.3%, specificity 96%, and accuracy 91.7%, and in the determination of the character of the stenosis, sensitivity 95.6%, specificity 91.3%, and accuracy 94.5% were found. Conclusion. The combination of dynamic contrast-enhanced MRI and MRCP techniques in patients with suspected biliary obstruction gives the detailed information about the presence of obstruction, location, and causes and is a highly specific and sensitive method

Brucella Endocarditis Caused By Brucella Melitensis

Brucellosis is a zoonotic disease endemically seen in Turkey, which occurs with various clinical findings. It can lead to complications affecting many systems. Endocarditis is an infrequent, but serious complication of brucellosis.The aim of this case presentation is to remind that endocarditis can be a complication of brucellosis and if is undiagnosed or misdiagnosed, progresses fatal in a high rate

High-order epistasis in catalytic power of dihydrofolate reductase gives rise to a rugged fitness landscape in the presence of trimethoprim selection

Evolutionary fitness landscapes of several antibiotic target proteins have been comprehensively mapped showing strong high-order epistasis between mutations, but understanding these effects at the biochemical and structural levels remained open. Here, we carried out an extensive experimental and computational study to quantitatively understand the evolutionary dynamics of Escherichia coli dihydrofolate reductase (DHFR) enzyme in the presence of trimethopriminduced selection. To facilitate this, we developed a new in vitro assay for rapidly characterizing DHFR steady-state kinetics. Biochemical and structural characterization of resistance-conferring mutations targeting a total of ten residues spanning the substrate binding pocket of DHFR revealed distinct changes in the catalytic efficiencies of mutated DHFR enzymes. Next, we measured biochemical parameters (Km, Ki, and kcat) for a mutant library carrying all possible combinations of six resistance-conferring DHFR mutations and quantified epistatic interactions between them. We found that the high-order epistasis in catalytic power of DHFR (kcat and Km) creates a rugged fitness landscape under trimethoprim selection. Taken together, our data provide a concrete illustration of how epistatic coupling at the level of biochemical parameters can give rise to complex fitness landscapes, and suggest new strategies for developing mutant specific inhibitors

Recurrent Intestinal Intussuseption in Adult: A Case Report

Intussusseption is an usually incident that may present in pediatric patients but we encounter rarely in adults. It leads to obstruction of the gastrointestinal tract. In pediatric patients, etiological factors are due to benign incidents usually, but in adults, often depends on tumors. Etiological factors should be investigated after obtaining the reduction of intussusception and intraluminal pathologies should be excluded. It will cause to intussusseption recurrence after years if reduction perform without treating etiological factors

The Effect of Mask Use on the Ocular Surface During the COVID-19 Pandemic

Objectives:The new coronavirus disease 2019 (COVID-19) pandemic emerged in Wuhan, China in October 2019 and spread rapidly all over the world, making extended mask use an inescapable rule of daily life. Literature data indicate that the use of face masks increases the symptoms of dry eye in addition to preventing the spread of COVID-19. The aim of our study was to evaluate the relationship between the clinical signs and symptoms of dry eye and the duration of mask use in healthy individuals using regular face masks.Materials and Methods:Thirty-five patients aged 20-60 years with no additional ophthalmologic pathology were included in the study. Participants were stratified by duration of face mask use: ≤6 hours/day (group 1) and >6 hours/day (group 2). The patients were assessed with the ocular surface disease index (OSDI) questionnaire, fluorescein ocular surface staining, and tear break-up time (TBUT) to evaluate the effect of extended mask use on the ocular surface.Results:A total of 62 eyes of 35 patients, 20 women (57.1%) and 15 men (42.9%), were included in the study. The two mask use duration groups had similar OSDI values (p=0.618). When the ocular surface staining pattern was examined according to the Oxford scale, 50% (10/20) of the eyes in group 1 were assessed as stage 1 and the other 10 eyes as stage 0. In group 2, 47.6% (20/42) of the eyes were assessed as grade 1, 11.9% (5/42) as grade 2, and 4.7% (2/42) as grade 3.Conclusion:Face mask use was shown to cause decreased TBUT and ocular surface staining even in healthy individuals. Further studies are needed to investigate changes in tear film after extended daily mask use

The effect of induction duration on postabortal hemorrhage in second-trimester pregnancy termination with misoprostol

Objective: The aim was to investigate how the duration of induction affects postabortion hemorrhage in second-trimester pregnancy terminations using misoprostol. Methods: This single-center retrospective cohort study was conducted between April 2020 and April 2021 at a university hospital. Singleton pregnant women having gestational age of 13–26 weeks and being hospitalized for termination were included in the study. The misoprostol was administered 200 µg every 4 hours intravaginally to patients already diagnosed with miscarriage, and 400 µg every 3 hours to all remaining patients. Estimated blood loss volume (EBLV) was calculated using a formula previously defined by Stafford et al. A total of 117 singleton pregnant women having gestational age of 13–26 weeks and being hospitalized for pregnancy termination were included in the study. Of these, 78 patients aborted within 0–24 hours (Group 2). The remaining 39 patients aborted in more than 24 hours (Group 1). Results: The EBLV was higher in the study group (p=0.003). In addition, the rate of patients with ≥500 cc and ≥1000 cc blood loss was also significantly higher in the study group (p values 0.049 and 0.016, respectively). After adjusting for potential confounder factors, the probability of blood loss of ≥500 cc and ≥1000 cc was found to be higher in the study group (adjusted OR: 2.720, 95% CI: 1.12–6.58 and adjusted OR: 6.987, 95% CI: 1.25–38.98, respectively). Conclusion: Postabortion hemorrhage risk was found to be higher in patients whose induction period lasted longer than 24 hours in second-trimester terminations with misoprostol. However, there was no deterioration in the patient’s clinical status and no increase in transfusion rates. Care should be taken with regard to vaginal bleeding in misoprostol applications lasting longer than 24 hours