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ResumeBackground: Acute rhinosinusitis (ARS) is one of the most common diseases encountered in the out-patient setting. X-ray of the paranasal sinuses is the gold standard in the diagnosis of ARS with its accessibility and accuracy. Ultrasound examination of the paranasal sinuses is a noninvasive diagnostic method which is an acceptable alternative in the follow-up of the treatment. Aim: To present the application of portable sinuson in the out-patient setting on patients with ARS and its effectiveness. Materials and Methods: 22 patients (12m/10f) underwent X-ray of the paranasal sinuses, which resulted in ARS. The results of the X-rays were compared with the ultrasound examination of the paranasal sinuses with a portable sinuson (SINUSULTRA ULTRAMAX). The examination was repeated on the 1-st and 2-nd week and 2 months after the treatment for ARS. Results: From the 22 patients -10 were with unilateral maxillary sinusitis, 7 with bilateral sinusitis and 5 with pansinusitis. 5 (22%) false positives were registered from the ultrasound examination on the initial check-up, 3 (13%) false negatives were registered on the follow-ups on the 1-st and the 2-nd week, 2 (9%) false negatives were registered 2 months after the treatment for ARS. Conclusion: Ultrasound examination of the paranasal sinuses is a noninvasive, painless, fast and with an adequate degree of accuracy. It is a good alternative for children and pregnant women. Ultrasound examination can be applied in the follow-up of ARS.

Background: Functional Endoscopic Sinus Surgery (FESS), supported by a navigation system, is a modern minimally invasive method for diagnosis and surgical treatment of nasal polyposis, acute and chronic sinusitis, benign and malignant tumors of the nasal cavities and skull base, congenital anomalies, severe epistaxis, and a number of other pathological processes in these anatomical areas. Advantages of the method are the improved orientation through navigation, reduced blood loss, sparing of neighboring tissues and structures, optimization of postoperative results, reduction of recovery period and pain as well as the optimized quality of life of the patient. Aim: Presentation of pilot results from the first surgical interventions under Work Package 3 "Endoscopic sinus surgery, supported by a navigation system, in ENT practice", performed in the "Integrated Interdisciplinary Operating Unit with Navigation and Telesurgery Systems" built under the project BG05M2OP001-1.002-0010 "Center of Competence in Personalized Medicine, 3D and Telemedicine, Robot-assisted and Minimally Invasive Surgery" funded by the "Science and education for smart growth" Operational Program and the European Regional Development Fund. Results: The surgical interventions were performed without intraoperative and early postoperative complications; the recovery period was smooth. During the follow-up examinations, we observed good local postoperative status, optimal period of healing and absence of subjective complaints reported by the patients. Conclusion:Our pilot results support the advantages of navigated FESS for safer, more precise and sparing radical treatment of diseases of the nose and nasal cavities. Extended multidisciplinary studies are forthcoming within the project for overall assessment of the significance and applicability of the introduced method in different groups of patients.

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