Meta-analysis identifies risk factors for patency loss after PTA in hemodialysis patientsDiabetes and blood pressure threaten dialysis access vessel longevity

Renal failure Published April 23, 2026 Study authors: Zhan Ya, Fu Xinwei, Li Guisen, He Bin PubMed ↗ DOI ↗ Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

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Key Takeaway

Consider diabetes, lesion length, and prior interventions as key risk factors for patency loss after PTA in hemodialysis patients.

This systematic review and meta-analysis pooled data from 6,407 hemodialysis patients to identify risk factors for loss of primary and secondary patency after percutaneous transluminal angioplasty (PTA) for arteriovenous fistula stenosis. The analysis found that diabetes (OR 1.02, 95% CI 1.01-1.02), lesion length >2 cm (OR 2.87, 95% CI 1.38-5.96), previous intervention (OR 3.13, 95% CI 1.69-5.79), failed AVF history (OR 1.69, 95% CI 1.22-2.35), and brachiocephalic configuration (OR 1.73, 95% CI 1.33-2.26) were independent risk factors for compromised primary patency. For secondary patency, diabetes (OR 1.05, 95% CI 1.02-1.08), longer lesions (OR 1.01, 95% CI 1.01-1.02), and residual stenosis (OR 1.02, 95% CI 1.01-1.04) were significant. Restenosis risk was elevated with diabetes (OR 1.72, 95% CI 1.28-2.31) and hypertension (OR 1.59, 95% CI 1.04-2.44), while medical therapy with nitrates was protective (OR 0.20, 95% CI 0.05-0.79). The authors emphasize targeting modifiable procedural and hemodynamic variables to improve outcomes. Limitations include potential heterogeneity across studies and lack of reported follow-up duration. These findings support individualized risk assessment but require confirmation in prospective trials.

Imagine relying on a dialysis access to stay open so you can live. For 6,407 patients, keeping that pathway clear is a constant battle. When the vessel narrows, treatment stops working. This review looked at what makes that happen. It examined factors that threaten the success of the procedure.

A review of studies found that diabetes and high blood pressure make it harder for the access to stay open. Longer blockages and past surgery failures also raised the risk significantly. Even the type of connection used mattered for success. Specific conditions like diabetes increased the odds of the vessel closing.

One bright spot exists. Taking nitrates as medical therapy lowered the chance of the vessel narrowing again. This finding suggests medication might help keep the access working. The data did not report safety issues. This means we do not know about side effects yet.

The study did not track how long patients stayed in the study. Doctors need to focus on these risk factors to help patients. Targeting these variables could improve outcomes for those on dialysis. Understanding these risks helps doctors plan better care.

What this means for you:

Diabetes and blood pressure threaten dialysis access, but nitrates help keep vessels open.

Study Details

Study typeMeta analysis

EvidenceLevel 1

PublishedDec 2026

PMID42020341

View Original Abstract ↓

This systematic review and meta-analysis identified factors influencing patency after percutaneous transluminal angioplasty (PTA) for autogenous arteriovenous fistulae (AVF) in hemodialysis patients. Literature through July 2025 was searched for observational and randomized trials. Two reviewers independently performed study selection, quality assessment (Newcastle-Ottawa Scale/Cochrane tool), and data extraction. Meta-analyses used fixed-/random-effects models in R (per I statistic), with sensitivity and publication bias analyses. Fifty-two studies ( = 6,407) were included, 45 of high quality. For primary patency, independent risk factors were diabetes (OR = 1.02, 95% CI 1.01-1.02), lesion length >2 cm (OR = 2.87, 1.38-5.96), previous intervention (OR = 3.13, 1.69-5.79), failed AVF history (OR = 1.69, 1.22-2.35), brachiocephalic configuration (vs. radiocephalic, OR = 1.73, 1.33-2.26), vascular calcification, and multiple comorbidities. High post-PTA flow was protective, and drug-coated balloons outperformed conventional angioplasty. Secondary patency was compromised by diabetes (OR = 1.05, 95% CI 1.02-1.08), longer lesions (OR = 1.01, 95% CI 1.01-1.02), and residual stenosis (OR = 1.02, 95% CI 1.01-1.04), with procedural success protective. Intimal hyperplasia strongly predicted failure. Restenosis risk was elevated by diabetes (OR = 1.72, 95% CI 1.28-2.31) and hypertension (OR = 1.59, 95% CI 1.04-2.44), while medical therapy with nitrates (OR = 0.20, 95% CI 0.05-0.79) and higher albumin were protective. Conventional biomarkers had limited value. Long-term AVF patency after PTA depends on anatomical, historical, and pathological factors, emphasizing the need to target modifiable procedural and hemodynamic variables in clinical practice.

Meta-analysis identifies risk factors for patency loss after PTA in hemodialysis patientsDiabetes and blood pressure threaten dialysis access vessel longevity

Study Details

Systematic review confirms clip anastomosis improves one and two year primary patency rates for arteriovenous fistula creation compared to suture methods

Vascular Clips Outperform Sutures for Dialysis Access Longevity

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Meta-analysis identifies risk factors for patency loss after PTA in hemodialysis patientsDiabetes and blood pressure threaten dialysis access vessel longevity

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Study Details

Systematic review confirms clip anastomosis improves one and two year primary patency rates for arteriovenous fistula creation compared to suture methods

Vascular Clips Outperform Sutures for Dialysis Access Longevity

Clinical research that matters. Delivered to your inbox.

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