Vieira, PedroRosa, Nuno G.Castanha, GuidaSilva, Gil2019-12-272019-12-272015Clinical Nephrology, Vol. 84 – No. 3/2015 – Letter to the editorhttp://hdl.handle.net/10400.26/30671Hemodialysis catheter dysfunction (CDys) has been defined by Kidney Disease utcomes Quality Initiative (K/DOQI) guidelines as “failure to maintain an extracorporeal blood flow sufficient to perform hemodialysis without significantly lengthening the hemodialysis treatment” [1], influencing stage 5 chronic kidney disease (CKD) patients’ morbidity and mortality [2]. Among the causes of CDys, those occurring within the first 2 weeks of placement are defined as early dysfunction commonly resulting from mechanical problems, which include inadequate positioning, kinking, or constriction, while late dysfunction usually results from thrombus formation [1]. However, this case report demonstrates that one must also consider other causes of CDys.engsitus ambiguousinferior vena cavafemoral hemodialysis catheterPortugalMadeira IslandCDysHemodialysis catheter dysfunctionjournal article10.5414/CN108513