Browsing by Author "Yildirim, Tulin"

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Diagnosis and Management of Retained Foreign Objects
(2015) Yildirim, Tulin; Parlakgumus, Alper; Yildirim, Sedat; 0000-0001-7788-9416; 0000-0002-5735-4315; 26008665; AAQ-7559-2021; AAF-4610-2019
Retained surgical foreign objects (RFO) include surgical sponges, instruments, tools or devices that are left behind following a surgical procedure unintentionally. It can cause serious morbidity as well as even mortality. It is frequently misdiagnosed. It should be considered in the differential diagnosis of any postoperative case with unresolved or unusual problems. Risk factors for RFOs include emergency procedures, unplanned change in operation, and body mass index and are clarified as being more frequent approximately 1 in 700 emergent cases. Although human errors cannot be completely prevented, medical training and consistency to rules seem to reduce the incidence to a minimum. It is a legal issue and potentially dangerous medical error. The definition, types, incidence, risk factors, complications and prevention strategies from RFOs are reviewed, from the comprehensive series until the year 2014.
Evaluation of brain perfusion in Alzheimer disease with perfusion computed tomography and comparison to elderly patient without dementia
(2016) Yildirim, Tulin; Karakurum Göksel, Basak; Demir, Senay; Tokmak, Naime; Tan, Meliha; 27513264
Background/aim: The aim of this study was to evaluate perfusion computed tomography (PCT) findings in patients with Alzheimer disease and to compare them with those of patients without dementia. Materials and methods: PCT was performed in 35 patients: 20 with Alzheimer disease (mean age, 69.7 +/- 5.5 years) and 15 control subjects (mean age, 67.5 +/- 3.5 years). Control subjects were elderly individuals with no cognitive problems who were admitted with headaches. All PCT examinations were performed on a 4-slice CT unit. The PCT analysis software program was used to calculate regional cerebral blood flow (rCBF), regional cerebral blood volume (rCBV), regional time-to-peak (rTTP) values in the bilateral frontal, temporal, and occipital cortices, and bilateral lentiform nucleus. Results: rCBF values in the bilateral frontal and temporal cortices and bilateral lentiform nucleus were significantly lower in the patients with Alzheimer disease than in the control subjects. There were no significant differences in rCBV values between Alzheimer disease and the control group. rTTP values in all cortical areas and bilateral lentiform nucleus were significantly higher in the patients with Alzheimer disease than in the control subjects. Conclusion: PCT is a rapid and reliable imaging modality for evaluating brain perfusion in Alzheimer disease.
Evaluation of the possible effect of magnetic resonance imaging noise on peripheral hearing organ with the otoacoustic emission
(2020) Turay, Cevahir Bulut; Ozer, Fulya; Yildirim, Tulin; 0000-0001-5381-6861; 0000-0002-8453-6069; 32629148; ABC-1809-2020; AAJ-2445-2021
Purpose: The aim of this study is to evaluate the effect of noise produced by magnetic resonance imaging (MRI) device on hearing by using objective and subjective audiological assessments. Methods: A total of 38 patients between the ages of 18 and 50 without hearing loss, and had performed MRI for brain, head, neck or cervical imaging were included in this prospective clinical study. Pure tone audiometry, speech audiometry, high frequency audiometry, transient evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emission (DPOAE) were performed before and after MRI. Results: There was no statistically significant difference in TEOAE, pure tone audiogram, high frequency audiogram and speech audiogram thresholds. In DPOAE, the median value before and after MRI at the frequency of the left ear at 4.0 kHz was 13.6 (8.5-19.9) and 15.7 (8.9-20.7) SNR respectively (p > .05). The median value before MRI at the right ear 4.0 kHz frequency was 14.1 (9.1-20.5) SNR, whereas the median value after MRI was 13.2 (8.8-19.8 SNR (p = 0,03). There was no statistically significant difference in other frequencies in DPOAE. Conclusions: This is the first objective study that examines the MRI noise on speech audiometry and otoacoustic emission together. However, the effect of MRI noise on hearing pathway is still doubt. Based on the difference at 4 kHz frequency on DPOAE; on-earphones may not sufficiently protect the patients from the MRI noise and this issue should deserve further research.