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Summary:This study covers the technique of a custom designed circular external fixator (CEF) in tibial fractures in 7 cats.All tibial fractures were surgically treated. The cases were followed-up using radiographs obtained on 25 and 48 days after surgery. Signalment, fracture localization, complications and implant diameter for each cat were noted. Ring diameters were as follows: in 4 tibial fracture cases 45 mm and in 3 tibial fracture cases 55 mm. Complications were observed in 2 cats, both of which had pin tract infection. Fracture cases were evaluated as follows: 5 of the tibial fractures had excellent results and 2 cases had good results. The CEF system was well tolerated by all the cats during the postoperative follow-up period. First use of the treated limb occurred on postoperative 1-3 day in all cases. Pin deformation or CEF breakage and distortion were not observed in any of the cases. The CEF system designed by the authors was suitable for fixation of tibial fractures in cats. Clinical use of CEF system in tibial fractures of cats is found to be useful and its use is highly recommended to our colleagues.Keywords: Cat, circular external skeletal fixator, fracture, tibial fracture, tibia. Yedi kedide tibia kırıklarının sirküler eksternal fiksasyon kullanılarak sağaltımı

BACKGROUND Chronic otitis media (COM) is an inflammatory disease that lasts for a long time. It is common in developing countries. Hearing loss can result from COM. The relationship between variations in middle ear anatomy and COM was investigated in our study. AIM To compare the prevalence of middle ear anatomic variations between the cases with COM and healthy individuals. METHODS This retrospective study included 500 patients with COM and 500 healthy controls. The presence of those variants was determined: Koerner’s septum, facial canal dehiscence, high jugular bulb, jugular bulb dehiscence, jugular bulb diverticulum, sigmoid sinus anterior location and deep tympanic recesses. RESULTS A total of 1000 temporal bones were examined. The incidences of these variants were respectively (15.4%-18.6%), (38.6%-41.2%), (18.2%-4.6%), (2.6%-1.2%), (1.2%-0%), (8.6%-0%), (0%-0%). It was observed that only high jugular bulb ( P < 0.001) and anteriorly located sigmoid sinus frequencies ( P = 0.002) in the case group were statistically significantly higher than the control groups. CONCLUSION COM is a multifactorial disease and variants of middle ear have always been important in terms of potential risk for complication during surgery but rarely associated with COM as an etiology or as a consequence of the disease. We didn't find a positive correlation between COM and Koerner’s septum and facial canal defect. We ended up with a significant conclusion with the variants of dural venous sinuses -high jugular bulb, dehiscence of jugular bulb, diverticulum of jugular bulb and anteriorly located sigmoid sinus- that have been studied less and frequently associated with inner ear illnesses.

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