INTRODUCTION: Distal targeting of intramedullary nails has different solutions worldwide, but none of them is used as a standard. The most common method used in practice is targeting by means of the aforementioned peroperative skiascopy, which increases the dose of Xrays for both the patient and the staff. In 2018, an intramedullary nail for osteosynthesis of humeral diaphyseal fractures with the possibility of targeting the distal locking screws using an electromagnetic system for distal targeting was registered in the Czech Republic. AIM OF THE STUDY: Description of a new method and first experience with distal targeting of the intramedullary humeral nail using an electromagnetic system for distal targeting. MATERIAL AND METHOD: At the Department of Trauma Surgery, Ostrava University Hospital, we have so far performed 6 osteosyntheses of humeral diaphyseal fractures using an intramedullary nail with electromagnetic distal targeting in 6 patients - 5 men and one woman. The average age of patients was 38 years (24-52). Osteosynthesis was indicated for type 12A (n-4) and 12B (n-2) fractures according to the AO/OTA classification. RESULTS: The average operative time was 56 min, the average electromagnetic targeting preparation time was 13.33 min, the average distal fixation time was 8.33 min, the average skiascopic time during the operation was 4,05 min. CONCLUSION: The Austofix Ezy-aim distal targeting system for long humeral studs offers an innovative way of targeting and drilling holes for distal locking screws. Its advantage is the minimization of X-ray radiation during the operation and also the accuracy of drilling. The disadvantage is more complex preparation of the arm for distal targeting and its calibration, as well as connection to the control unit by cables.

Institute of Disaster Medicine of the Faculty of Medicine of the University of Ostrava

Surgery and Trauma Clinic of the University Hospital Ostrava

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$a Osteosynthesis of humeral diaphyseal fracture by intramedullary nail with electromagnetic distal locking - introduction of the method and first experience / $c Roman Madeja, Milan Viskupič, Jiří Demel, Jiří Voves, Ondřej Měrka, Jana Pometlová, Lubor Bialy

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$a INTRODUCTION: Distal targeting of intramedullary nails has different solutions worldwide, but none of them is used as a standard. The most common method used in practice is targeting by means of the aforementioned peroperative skiascopy, which increases the dose of Xrays for both the patient and the staff. In 2018, an intramedullary nail for osteosynthesis of humeral diaphyseal fractures with the possibility of targeting the distal locking screws using an electromagnetic system for distal targeting was registered in the Czech Republic. AIM OF THE STUDY: Description of a new method and first experience with distal targeting of the intramedullary humeral nail using an electromagnetic system for distal targeting. MATERIAL AND METHOD: At the Department of Trauma Surgery, Ostrava University Hospital, we have so far performed 6 osteosyntheses of humeral diaphyseal fractures using an intramedullary nail with electromagnetic distal targeting in 6 patients - 5 men and one woman. The average age of patients was 38 years (24-52). Osteosynthesis was indicated for type 12A (n-4) and 12B (n-2) fractures according to the AO/OTA classification. RESULTS: The average operative time was 56 min, the average electromagnetic targeting preparation time was 13.33 min, the average distal fixation time was 8.33 min, the average skiascopic time during the operation was 4,05 min. CONCLUSION: The Austofix Ezy-aim distal targeting system for long humeral studs offers an innovative way of targeting and drilling holes for distal locking screws. Its advantage is the minimization of X-ray radiation during the operation and also the accuracy of drilling. The disadvantage is more complex preparation of the arm for distal targeting and its calibration, as well as connection to the control unit by cables.

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