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NAS, ÖMER FATİH

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ÖMER FATİH

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2015 - 2019142020 - 202310
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    Publication
    Direct aspiration thrombectomy experience with the SOFIA 6F catheter in acute ischemic stroke
    (Springer, 2021-01-19) Bilgin, Cem; Durmuş, Yavuz; Haki, Cemile; Nas, Ömer Fatih; Hakyemez, Bahattin; NAS, ÖMER FATİH; HAKYEMEZ, BAHATTİN; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı; 0000-0002-3425-0740; AAG-8561-2021; AAI-2318-2021
    Introduction As the SOFIA (Soft torqueable catheter Optimized For Intracranial Access) 6F catheter has a large luminal diameter, it can be used as an aspiration catheter. Furthermore, it may function as an intermediate catheter when a stent retriever is required. Purpose We aimed to evaluate the usefulness of the SOFIA 6F catheter in mechanical thrombectomy with the direct aspiration first pass technique.Method Patients who had undergone mechanical thrombectomy (September 2017-January 2019) using the SOFIA 6F catheter in two centers were retrospectively analyzed. We used the thrombolysis in cerebral infarction (TICI) scale to evaluate the success of recanalization. National Institutes of Health Stroke Scale scores on admission and discharge were used together with the modified Rankin Scale (mRS) scores at 90 days.Results In 132 (89.1%) of the 148 cases, the thrombus was in the anterior system. The SOFIA 6F catheter reached the thrombus site in 130 (87.8%) cases. The rate of successful recanalization (TICI >= 2b) was 89.1%. The targeted clinical outcome (mRS score <= 2 at 90th days) was achieved in 49.3% of cases. Symptomatic intracranial hemorrhage occurred in 5.4%. The rate of emboli to new vascular territories was 5.4%. Mortality was 14.1%.Conclusion In the majority of our cases, the SOFIA 6F catheter provided effective and rapid recanalization with aspiration thrombectomy.
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    Single-stage endovascular treatment in patients with severe extracranial large vessel stenosis and concomitant ipsilateral unruptured intracranial aneurysm
    (Türk Radyoloji Derneği, 2015-11-01) Kaçar, Emre; Nas, Ömer Fatih; Erdoğan, Cüneyt; Hakyemez, Bahattin; NAS, ÖMER FATİH; Erdoğan, Cüneyt; HAKYEMEZ, BAHATTİN; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; 0000-0002-3425-0740; COE-1124-2022; AAI-2318-2021; AAG-8561-2021
    PURPOSEWe aimed to evaluate the safety and effectiveness of single-stage endovascular treatment in patients with severe extracranial large vessel stenosis and concomitant ipsilateral unruptured intracranial aneurysm.METHODSHospital database was screened for patients who underwent single-stage endovascular treatment between February 2008 and June 2013 and seven patients were identified. The procedures included unilateral carotid artery stenting (CAS) (n=4), bilateral CAS (n=2), and proximal left subclavian artery stenting (n=1) along with ipsilateral intracranial aneurysm treatment (n=7). The mean internal carotid artery stenosis was 81.6% (range, 70%-95%), and the subclavian artery stenosis was 90%. All aneurysms were unruptured. The mean aneurysm diameter was 7.7 mm (range, 5-13 mm). The aneurysms were ipsilateral to the internal carotid artery stenosis (internal carotid artery aneurysm) in five patients, and in the anterior communicating artery in one patient. The patient with subclavian artery stenosis had a fenestration aneurysm in the proximal basilar artery. Stenting of the extracranial large vessel stenosis was performed before aneurysm treatment in all patients. In two patients who underwent bilateral CAS, the contralateral carotid artery stenosis, which had no aneurysm distally, was treated initially.RESULTSThere were no procedure-related complications or technical failure. The mean clinical follow-up period was 18 months (range, 9-34 months). One patient who underwent unilateral CAS experienced contralateral transient ischemic attack during the clinical follow-up. There was no restenosis on six-month follow-up angiograms, and all aneurysms were adequately occluded.CONCLUSIONA single-stage procedure appears to be feasible for treatment of patients with severe extracranial large vessel stenosis and concomitant ipsilateral intracranial aneurysm.
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    Demonstration of corkscrew collaterals in buerger's disease by superb microvascular imaging
    (Elsevier, 2019-09-01) Kandemirli, Sedat Giray; Gürsel, Başak Erdemli; ERDEMLİ GÜRSEL, BAŞAK; Yolgösteren, Atıf; YOLGÖSTEREN, ATIF; Nas, Ömer Fatih; NAS, ÖMER FATİH; Bursa Uludağ Üniversitesi/Tıp Fakültesi; 0000-0002-4467-3915; AAH-6568-2021; AAG-8561-2021; AAG-2372-2021
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    An assessment of slap type 5 lesions using proton density oblique sagittal imaging in magnetic resonance arthrography
    (Sage Publications, 2021-12-10) Öngen, Gökhan; Gökalp, Gökhan; Nas, Ömer Fatih; ÖNGEN, GÖKHAN; GÖKALP, GÖKHAN; NAS, ÖMER FATİH; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; 0000-0002-3682-2474; FQR-8472-2022; GMO-0473-2022; AAG-8561-2021
    Background Bankart lesions accompany superior labrum anteroposterior (SLAP) lesions; these are called SLAP type 5. Purpose To compare SLAP type 5 lesions using routine magnetic resonance arthrography (MRA) and thin-slice oblique sagittal proton density (PDW) sequences and correlation operation results. Material and Methods In total, 181 patients were admitted with shoulder instability. The study was completed with 44 patients. The presence or absence of isolated Bankart and SLAP type 5 lesions in routine MRA and PDW oblique sagittal images were evaluated separately. Absence of rupture scored 0 points, suspected ruptures scored 1 point, and apparent ruptures scored 2 points. The two scores were compared with the shoulder arthroscopy findings. Results According to the findings in the shoulder arthroscopy, 40 patients had Bankart lesions and 17 patients had accompanying SLAP type 5 lesions. To detect a Bankart lesion, there was no significant difference between routine MRA sequences and PDW oblique sagittal images (P = 0.061). Routine MRA sensitivity was 95%, specificity 25%, positive predictive value (PPV) 92%, negative predictive value (NPV) 33%, while for PDW oblique sagittal images, sensitivity was 75%, specificity 100%, PPV 100%, and NPV 28.5%. In 8/17 type 5 SLAP lesions, routine MRA detected sensitivity 47%, specificity 92.6%, PPV 80%, and NPV 73.5%; in 14/17 SLAP type 5 lesions, PDW oblique sagittal images detected sensitivity 82%, specificity 100%, PPV 100%, and NPV 90% (P = 0.015). Conclusion The PDW oblique sagittal images may play a significant role in assessing the anterior and superior extent of the tears.
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    Spinal Type II arteriovenous malformation and endovascular treatment
    (Elsevier Science, 2015-06-01) Nas, Ömer Fatih; Büyükkaya, Ramazan; Erdoğan, Cüneyt; Hakyemez, Bahattin; NAS, ÖMER FATİH; Erdoğan, Cüneyt; HAKYEMEZ, BAHATTİN; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; 0000-0002-3425-0740; AAG-8561-2021; AAI-2318-2021; COE-1124-2022
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    Evaluation of recurrent vertebral hydatid cyst with computed tomography myelography in a case with spinal instrumentation
    (Elsevier Science, 2015-11-01) Sanal, Bekir; Nas, Ömer Fatih; Büyükkaya, Ramazan; Hacıkurt, Kadir; Hakyemez, Bahattin; NAS, ÖMER FATİH; Hacıkurt, Kadir; HAKYEMEZ, BAHATTİN; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; AAG-8561-2021; AAI-2318-2021; EWW-9360-2022
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    The association between the CT severity index and the pulmonary artery area in COVID-19 pneumonia
    (Sage Publications Ltd, 2022-01-24) Ongen, Gökhan; Gökalp, Gökhan; Nas, Ömer Fatih; Özpar, Rıfat; Candan, Selman; ÖNGEN, GÖKHAN; GÖKALP, GÖKHAN; NAS, ÖMER FATİH; ÖZPAR, RİFAT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; 0000-0001-6649-9287; FQR-8472-2022; GMO-0473-2022; AAG-8561-2021; AAH-5062-2021
    Background The pulmonary artery area (PAA) is a valuable non-invasive method for the diagnosis of pulmonary hypertension. Purpose To compare the change in PAA in patients with COVID-19 with the computed tomography (CT) severity index using follow-up imaging. Material and Methods A total of 81 patients who were followed up and underwent CT assessment more than once at our hospital's pandemic department were evaluated retrospectively. Patients with progression were separated into three groups: progression ranging from mild-to-mild infiltration (Group A, CT severity index of 0-2); progression from mild to severe infiltration (Group B, CT severity index of 0-2 to 3-5); and progression from severe-to-severe infiltration (Group C, CT severity index of 3-5). The PAAs were calculated separately. Results The mean age was 56 +/- 12 years. In terms of those patients showing progression in the CT images, the number of patients in Groups A, B, and C was 29, 40, and 12 in the right lung; 32, 45, and 4 in the left lung; 23, 45, and 13 on both lungs, respectively. There was no significant difference between the main, right, and left PAAs in Group A (P > 0.05). In Group B, there were significant increases in the areas of the main, right, and left PAAs (P < 0.05). There were also significant increases in the areas of the right and main pulmonary arteries in Group C (P < 0.05). Conclusion PAAs increase as disease involvement advances in cases with COVID-19 pneumonia, which is thought to be correlated with progression.
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    Rare use of Atrieve Vascular Snare™ for percutaneous transcatheter retrieval of central venous port catheter fragments
    (Elsevier Masson, 2015-11-01) Nas, O. F.; Kaçar, E.; Doğan, N.; Atasoy, M. M.; Erdoğan, C.; NAS, ÖMER FATİH; Erdoğan, Cüneyt; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; AAG-8561-2021; COE-1124-2022
    Central venous port catheters and peripherally inserted central catheters (PICC lines) are implanted in the central venous system usually for administration of chemotherapeutic agents and parenteral nutrition [1,2]. Long-term use of these catheters may cause such complications as occlusion, thrombosis, infection, fracture and intravascular dislocation of the catheter [2,3]. The incidence of intravascular dislocation of port catheters is rare( 0-3.1%) [1,3]. Fragments of a fractured port catheter might migrate towards the heart or pulmonary artery and cause embolization in the distal region of the organ resulting in mortality [1,4]. Therefore, port catheter fragments must be retrieved as soon as possible[ 1]. Percutaneous retrieval, removal by open thoracotomy and long-term anticoagulant therapy are the treatment options for fractured port catheters. Among these options, percutaneous transcatheter retrieval is usually a safe and effective method [1,5]. In this study, we report the retrieval of port catheter fragments extending from the superior vena cava to the right cardiac cavities using a three-loop 6F 12-20 mm snare( Atrieve Vascular Snare (TM); Angiotech, Gainesville, FL, United States) in two patients who complained of chest pain.
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    Right- versus left-sided approach for transhepatic tunneled catheter placement: Is there a difference?
    (Springer, 2021-04-08) Nas, Ömer F.; Candan, Selman; Öztepe, Muhammed F.; Kandemirli, Sedat G.; Bilgin, Cem; İnecikli, Mehmet F.; Özkaya, Güven; Gökalp, Gökhan; Öngen, Gökhan; Erdoğan, Cüneyt; NAS, ÖMER FATİH; CANDAN, SELMAN; Öztepe, Muhammed F.; İNECİKLİ, MEHMET FATİH; ÖZKAYA, GÜVEN; GÖKALP, GÖKHAN; ÖNGEN, GÖKHAN; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Sağlık Bilimleri Enstitüsünde/Biyoistatistik Bilim Dalı.; 0000-0003-0297-846X; 0000-0002-3682-2474; AAK-5124-2020; HHS-7433-2022; GVS-7682-2022; AAG-8561-2021; DLB-1623-2022; IVU-2672-2023; GMO-0473-2022; FQR-8472-2022
    Objective We aimed to compare the technical difficulties, complications, long-term efficacy, and risks between right- and left-sided approach transhepatic tunneled catheterization. Methods We retrospectively evaluated transhepatic tunneled catheter placement cases in our institution between May 2012 and November 2019. Demographic and procedural parameters were recorded. Statistical tests were used to compare the complication rates of right- and left-sided approach. Furthermore, Cox regression analyses were used to investigate the relationship between functional catheter days and included parameters. Results A total of 83 procedures were performed in 46 patients, with a female to male ratio of 1.88 and a mean age of 55.5 +/- 18.2 years. Indication for catheter placement was chronic renal insufficiency and loss of central venous access through traditional routes in all cases. Median functional catheter durations were 28 days (1-382) and 55.5 days (1-780) for right-sided and left-sided access, respectively. Complication rates were similar for both sides. There was no difference between primary and revision procedures in terms of safety and efficacy outcomes. In univariate Cox regression analysis, gender was the only variable which was found to be statistically significant (HR = 2.014 (1.004-4.038)) for functional catheter days. In multivariate Cox regression model, gender and access side were included which failed to reach statistical significance. Conclusions In our study, both right- and left-sided approaches provided similar safety and efficacy outcomes, suggesting that both techniques can be employed based on physician's preference.
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    Kummel disease and successful percutaneous vertebroplasty treatment
    (Elsevier, 2015-11-01) Sanal, Bekir; Nas, Ömer Fatih; Büyükkaya, Ramazan; Hacıkurt, Kadir; Hakyemez, Bahattin; NAS, ÖMER FATİH; Hacıkurt, Kadir; HAKYEMEZ, BAHATTİN; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı; 0000-0002-3425-0740; AAG-8561-2021; AAI-2318-2021; EWW-9360-2022