Management of Transplant Renal Artery Stenosis

Transplant renal artery stenosis is a recognised vascular complication following kidney transplantation that can lead to refractory hypertension, progressive allograft dysfunction and, in severe cases, graft loss. Lesions most commonly arise at the arterial anastomosis but may also occur in the body of the graft artery owing to kinking, intimal hyperplasia or atherosclerotic change. Early detection is essential to prevent irreversible injury; clinical suspicion is raised by deteriorating renal function, difficult-to-control blood pressure and characteristic Doppler ultrasound findings. A multidisciplinary strategy encompassing nephrologists, transplant surgeons and interventional radiologists underpins optimal care. Current management prioritises minimally invasive endovascular techniques—percutaneous transluminal angioplasty with selective stent placement—aiming to restore perfusion while minimising procedural morbidity. In cases refractory to endovascular treatment or with complex anatomy, surgical revision of the anastomosis remains a valuable option. Adjunctive measures include meticulous control of immunosuppression, optimisation of cardiovascular risk factors and regular surveillance imaging to detect restenosis at an early stage.

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Management of Transplant Renal Artery Stenosis publication trend

The graph below shows the total number of articles in management of transplant renal artery stenosis across all publications each year (not limited to Nature Index journals).

Technical terms

Transplant renal artery stenosis: Narrowing of the renal artery supplying a transplanted kidney, most often at the surgical anastomosis, leading to reduced perfusion.

Duplex ultrasound: A non-invasive imaging technique combining B-mode and Doppler modalities to assess vessel anatomy and blood flow velocity.

Percutaneous transluminal angioplasty (PTA): A catheter-based procedure that dilates a stenosed vessel segment using a balloon.

Stent placement: Deployment of a tubular scaffold within an artery to maintain luminal patency after angioplasty.

Delayed graft function: A period of impaired allograft performance immediately post-transplant, often necessitating dialysis.

Peak systolic velocity (PSV): The highest blood flow speed recorded during systole, used to quantify severity of arterial stenosis.

References

1. Standardized Duplex Ultrasound‐Based Protocol for Early Diagnosis of Transplant Renal Artery Stenosis: Results of a Single‐Institution Retrospective Cohort Study. BioMed Research International (2018).
2. Evaluation of the efficacy and safety of endovascular management for transplant renal artery stenosis. Clinics (2017).
3. Risk factors of transplant renal artery stenosis in kidney transplant recipients. Clinics (2022).