The impact of rheolytic percutaneous mechanical thrombectomy on glomerular filtration rate levels

Abstract

ObjectiveRheolytic percutaneous mechanical thrombectomy (PMT) has been established as an endovascular technique for thrombus removal. Initial studies reporting on postinterventional kidney dysfunction have surfaced. The aim of this study was to investigate glomerular filtration rate (GFR) changes after PMT. MethodsA total of 45 interventions were included; 21 were performed in the venous system and 24 in the arterial system. Renal function was evaluated through assessment of GFR value changes from baseline to a minimum of two postinterventional values, and RIFLE criteria (Risk, Injury, Failure, Loss of kidney function, End-stage kidney disease) were applied. ResultsThe univariate analysis of variance revealed a significant association of GFR increase between time points and the type of intervention (arterious or venous; P = .002), whereas there was no significant association of intervention duration (P = .382), quantity of administered contrast medium (P = .544), or use of urokinase (P = .377). Repeated measures analysis of variance revealed a significant difference in GFR values between the four time points for venous interventions (P = .008) but not for arterial interventions (P = .908). In venous interventions, postinterventional GFR values were significantly lower compared with preinterventional values (P = .008) and the two measurements after intervention (P = .017 and P = .014, respectively). According to the RIFLE criteria, 1 of the 21 patients in the venous group had a complete loss of kidney function and 2 patients progressed to the risk group (GFR decreases >25%). ConclusionsPMT in the venous system has a significant impact on GFR levels, although there is only a low risk for clinically important renal dysfunction. The occurrence of renal impairment should be taken into account in evaluating PMT treatment, especially because of the associated morbidity.