1. To know somecommonly used medical devices and their correct locationbased on systemic classification. 2. To recognize radiologicalfindings of abnormally located medical devicesand be aware of possible complications related to them. 3. To emphasize the importance ofhaving checkpoints about medical tubes, catheters, and stentswhen evaluating radiological studies to avoid overlooking malpositioned devices and related complications.

Medical tubes, stents,catheters are used in wide-ranged conditions, play important role in patient management. Functions and imaging findings of these medical devices should be well-known by radiologists. Knowledge of normal anatomic position is key-point for identifying important abnormal conditions which may affect patient treatment/prognosis. Ultrasound, fluoroscopy, other auxiliary methods dramatically increase successful placement of needles/guidewires/catheters. However, significant numbers of catheter misplacements can,still, be encountered. In this study, we will present imaging findings of some abnormally located tubes/catheters/stents. We will examine medical devices in two parts...

A. VASCULAR: Arterial/venous vascular accesses are required in clinical practices for several reasons. Different types of catheters are used to gain vascular access; tunneled/non-tunneled central venous catheters (CVC), peripheral catheters, pulmonary artery catheters, peripherally inserted CVCs, umbilical arterial or venous catheters (UAC/UVC), midline catheters, etc… Vascular catheters can be used for administering drugs, monitoring central venous pressure,measurement of central venous oxygen saturation/ renal replacement therapy/total parenteral nutrition/cardiac catheterization/transvenous cardiac pacing. For well-functioning, ideal position of the catheter must be provided.There are ideal positions for each...

The presence of medical tubes, stents and catheters on radiological images should bechecked when evaluating radiological examination. For correct interpretation of detected medical devices, their definition, function and expected anatomic location should be well known. Once these are fulfilled, the possibility of detecting potential pathological conditions related to misplaced or displaced medical devices may be increased, and great improvements in patient management could be achieved.

Ö. Önder-Ankara/TR - nothing to disclose//A. Azizova- Ankara/TR - nothing to disclose//Y. Yaraşir-Ankara/TR - nothing to disclose//G. Durhan-Ankara/TR - nothing to disclose//O. M. Ariyürek-Ankara/TR - nothing to disclose.

References are shown in Figure 11.