Clinical Epidemiology & Public Health

1. Introduction

End-stage renal disease (ESRD) continues to represent a major and steadily expanding global health burden, driven largely by the increasing prevalence of diabetes mellitus, hypertension, cardiovascular disease, and aging populations. For many patients living with advanced renal failure, maintenance hemodialysis remains the primary life-sustaining therapy, often requiring long-term and repeated vascular access for adequate treatment delivery (Allon & Robbin, 2002). Within this context, the arteriovenous fistula (AVF) has become widely recognized as the preferred vascular access modality because of its superior long-term patency, lower infection risk, and reduced mortality when compared with central venous catheters or synthetic arteriovenous grafts (Gallieni et al., 2019). Although technological advances in dialysis care have improved survival outcomes over recent decades, maintaining functional vascular access remains one of the most persistent and clinically demanding aspects of hemodialysis management.

The AVF is often described as the “lifeline” of the hemodialysis patient, and perhaps that description is not an exaggeration. A well-functioning fistula permits effective dialysis clearance, minimizes hospitalization, and contributes substantially to patient quality of life. Yet despite its advantages, the AVF is far from complication-free. Many fistulas fail to mature adequately after surgical creation, while others gradually deteriorate because of repeated cannulation trauma, vascular stenosis, thrombosis, aneurysm formation, or infection (Stolic, 2013). These complications frequently lead to repeated interventions, emergency access replacement, interruption of dialysis schedules, and considerable healthcare expenditure. In the United States alone, vascular access management has been estimated to consume nearly one billion dollars annually, illustrating both the clinical and economic magnitude of the problem (Allon & Robbin, 2002).

The pathophysiology underlying AVF dysfunction is complex and multifactorial. Among the most common causes of fistula failure are venous stenosis and thrombosis. Stenosis generally develops through neointimal hyperplasia, a pathological process characterized by smooth muscle cell proliferation and progressive narrowing of the vascular lumen. Repeated needle trauma, turbulent blood flow, uremic vascular injury, and chronic inflammation all appear to contribute to this process (Stolic, 2013). If left unrecognized, progressive stenosis reduces access blood flow and eventually predisposes the fistula to thrombosis, which remains one of the leading causes of sudden access loss in chronic hemodialysis patients. In many cases, thrombosis is not an isolated event but rather the final consequence of prolonged, undetected vascular dysfunction.

Other complications may evolve more gradually but can still carry serious clinical implications. Aneurysmal dilation, for example, may occur following repeated puncture in localized areas of the fistula, eventually leading to skin thinning, bleeding, or rupture. Likewise, dialysis access-associated steal syndrome can compromise distal limb perfusion, producing ischemic pain, coldness, numbness, or even tissue necrosis, particularly among elderly and diabetic individuals (Gallieni et al., 2019). Infections, although less common in AVFs than in grafts or central venous catheters, remain clinically important because localized cellulitis can rapidly progress to systemic sepsis when aseptic practices are inadequate during cannulation procedures (Pinto et al., 2021). These complications collectively illustrate that successful AVF management extends well beyond surgical creation and requires continuous surveillance throughout the lifespan of the access.

In clinical practice, nurses occupy a uniquely important position in AVF preservation because they maintain the most regular and direct contact with hemodialysis patients. Unlike episodic physician consultations or occasional imaging evaluations, nursing assessment occurs repeatedly—often several times each week—during routine dialysis sessions. This repeated exposure allows nurses to identify subtle changes in fistula appearance, bruit characteristics, thrill quality, bleeding patterns, or patient-reported symptoms before overt failure occurs. Increasingly, evidence suggests that structured nursing surveillance may significantly improve early detection of access dysfunction and reduce avoidable complications (Jackson et al., 2018).

The traditional “look, listen, and feel” approach remains central to AVF clinical assessment. Inspection involves evaluating the access arm for edema, erythema, aneurysmal changes, collateral veins, or signs of infection. The arm-raising test, for instance, may help identify venous outflow stenosis when the fistula fails to collapse appropriately during elevation (Abreo et al., 2018). Palpation allows clinicians to assess the presence and quality of the thrill, while auscultation can detect changes in bruit characteristics suggestive of progressive stenosis or turbulent flow abnormalities. Interestingly, several studies have demonstrated that systematic physical examination may achieve diagnostic accuracy comparable to more technologically intensive surveillance methods when performed by experienced clinicians (Sousa et al., 2014).

Nevertheless, the effectiveness of physical assessment depends heavily on nursing competency, clinical experience, and standardized surveillance protocols. Jackson et al. (2018) argued that structured AVF assessment remains underutilized in many dialysis units despite its proven clinical value. Similarly, Correia et al. (2021) emphasized that maturation assessment and ongoing AVF monitoring require both technical skill and consistent clinical interpretation. Without standardized training and regular surveillance practices, early signs of dysfunction may be overlooked until thrombosis or irreversible access failure occurs.

Cannulation technique represents another critically important determinant of AVF longevity. Repeated needle insertion is unavoidable in maintenance hemodialysis, yet the manner in which cannulation is performed can substantially influence vascular trauma and long-term fistula preservation. Current practice primarily involves three approaches: rope-ladder, buttonhole, and area puncture techniques. International guidelines generally discourage the area puncture method because repeated needling within a confined region increases the likelihood of aneurysm formation, stenosis, and vessel wall degeneration (Gallieni et al., 2019).

Among contemporary approaches, rope-ladder cannulation is often regarded as the safest technique because puncture sites are rotated along the length of the fistula, thereby distributing vascular trauma more evenly (Pinto et al., 2021). In contrast, buttonhole cannulation repeatedly uses the same puncture tract and may improve patient comfort or facilitate cannulation in difficult fistulas. However, several investigations have raised concerns regarding increased infection risk associated with buttonhole methods, particularly when aseptic protocols are inconsistently followed (Bayoumi & Khonji, 2020). Consequently, selecting an appropriate cannulation strategy requires careful balancing of patient anatomy, staff expertise, and infection-control practices.

Beyond technical procedures, patient involvement in AVF preservation has become increasingly recognized as a fundamental component of successful dialysis care. Nurses play a major educational role by teaching patients how to monitor their access and recognize early warning signs of dysfunction. Patients are commonly instructed to check for a palpable thrill daily, maintain access hygiene, avoid blood pressure measurements on the fistula arm, and refrain from prolonged compression or sleeping on the affected limb (Sousa et al., 2015). Studies have shown that improved patient knowledge and self-care behaviors may reduce complication rates while enhancing overall treatment adherence and quality of life (Ozen et al., 2016; Pal et al., 2021).

Despite growing awareness of the importance of surveillance and self-management, considerable variability still exists in nursing practices, patient education strategies, and vascular access monitoring approaches across dialysis settings. Some centers employ highly structured surveillance programs integrating Doppler ultrasound and flow monitoring, whereas others rely primarily on routine clinical observation. Similarly, the extent of patient education and standardized nursing assessment differs substantially between institutions and healthcare systems.

Given these ongoing challenges, a clearer understanding of effective nursing-led assessment and management strategies is needed to improve AVF outcomes in hemodialysis populations. Therefore, this review aims to evaluate the role of nursing clinical assessment, surveillance techniques, cannulation practices, and patient self-care interventions in preventing AVF-related complications and preserving long-term vascular access function among individuals undergoing maintenance hemodialysis.

2. Methodology

2.1 Study Design and Review FrameworkThis study was conducted as a systematic review with quantitative synthesis to evaluate the effectiveness of nursing-led assessment, surveillance, cannulation strategies, and self-care interventions in reducing arteriovenous fistula (AVF)-related complications among hemodialysis patients. The review methodology was developed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidelines to ensure methodological transparency, reproducibility, and comprehensive reporting (Page et al., 2021) as represented in Figure 1. In addition, methodological procedures for study selection, data extraction, effect size synthesis, and heterogeneity assessment were informed by recommendations from the

Figure 1: PRISMA 2020 Flow Diagram of Study Selection and Screening Process for the Systematic Review and Meta-Analysis. The figure illustrates the stepwise identification, screening, eligibility assessment, and inclusion of studies evaluating nursing assessment, surveillance, and management strategies for arteriovenous fistula complications in hemodialysis patients. A total of 14 studies were ultimately included in the quantitative synthesis (meta-analysis) following PRISMA 2020 guidelines.

Cochrane Handbook for Systematic Reviews of Interventions (Higgins et al., 2022).

The review primarily focused on studies examining AVF complications in relation to nursing surveillance, physical assessment, cannulation techniques, vascular access monitoring, and patient self-care education. Both qualitative synthesis and meta-analytic pooling were undertaken to provide a broader understanding of the effectiveness of intervention-based AVF management strategies in chronic hemodialysis populations.

2.2 Literature Search Strategy

A structured literature search was performed across several electronic databases, including PubMed, Scopus, Web of Science, Google Scholar, and ScienceDirect. Additional manual searches were conducted using the reference lists of relevant review articles and eligible studies to identify potentially missed publications. The search process included studies published in English up to June 2023.

Search terms were developed using combinations of Medical Subject Headings (MeSH) terms and free-text keywords related to arteriovenous fistulas, hemodialysis nursing, vascular access complications, thrombosis, cannulation, surveillance, and patient self-care. Representative search terms included: “arteriovenous fistula,” “hemodialysis,” “vascular access complications,” “nursing assessment,” “thrombosis,” “infection,” “cannulation technique,” “buttonhole,” “rope-ladder,” “surveillance,” “self-care,” and “vascular access monitoring.” Boolean operators such as “AND” and “OR” were used to refine the search strategy.

The literature search aimed to identify both interventional and observational studies reporting clinically relevant AVF outcomes, particularly those involving nursing-related management strategies or surveillance interventions.

2.3 Eligibility Criteria

Studies were considered eligible for inclusion if they investigated adult patients undergoing maintenance hemodialysis using arteriovenous fistulas (AVFs) and evaluated outcomes related to nursing-led assessment, vascular access surveillance, cannulation strategies, or patient self-care interventions. Randomized controlled trials, retrospective cohort studies, quasi-experimental investigations, and observational studies were included if they reported clinically relevant AVF outcomes such as thrombosis, infection, stenosis, hematoma, steal syndrome, AVF dysfunction, or overall complication rates. Studies were also required to provide sufficient quantitative data for extraction of event frequencies, comparative outcomes, or effect size estimation. Only studies published in English were considered for analysis.

Studies were excluded if they focused exclusively on central venous catheters or arteriovenous grafts without providing AVF-specific outcomes. Conference abstracts, editorials, expert opinions, case reports, letters, and non-peer-reviewed publications were also excluded because of limited methodological detail and insufficient quantitative data. Duplicate studies, overlapping datasets, and articles lacking extractable outcome information were removed during the screening process. The eligibility assessment was conducted according to the PRISMA 2020 framework and methodological recommendations outlined in the Cochrane Handbook for Systematic Reviews of Interventions (Higgins et al., 2022; Page et al., 2021).

2.4 Study Selection Process

The study selection process followed the PRISMA 2020 framework (Page et al., 2021). Initially, all retrieved records were screened based on titles and abstracts. Potentially relevant articles then underwent full-text review to assess eligibility according to the predefined inclusion and exclusion criteria. Duplicate studies were removed before screening.

Disagreements regarding study inclusion were resolved through discussion and repeated evaluation of study eligibility criteria. The final synthesis included studies reporting AVF-related complications and management outcomes relevant to nursing assessment or surveillance strategies. A total of 14 studies were ultimately included in the quantitative analysis (n = 14).

2.5 Data Extraction

Data extraction was performed systematically using a structured extraction format adapted from standard systematic review methodology (Higgins et al., 2022). Relevant information was collected from each included study, including author name, publication year, study design, sample size, patient population, intervention characteristics, control conditions, and duration of follow-up. Additional clinical variables extracted included cannulation technique, type of nursing intervention or surveillance strategy, AVF-related complications, and primary clinical outcomes.

For quantitative synthesis, numerical outcome data including event frequencies, risk ratios (RRs), confidence intervals (95% CIs), and standard errors were extracted whenever available. In studies where effect estimates were not directly reported, outcome measures were calculated from the raw event data provided in the articles. Data extraction also included information regarding thrombosis rates, infection outcomes, AVF dysfunction, hematoma formation, steal syndrome, patient self-care scores, and treatment adherence outcomes. To minimize extraction inconsistencies, the extracted information was reviewed repeatedly and cross-checked with the original studies before inclusion in the final synthesis and meta-analysis.

2.6 Quantitative Synthesis and Meta-Analysis

Quantitative synthesis was performed using pooled risk ratio (RR) estimates with corresponding 95% confidence intervals. A random-effects model was applied for meta-analysis because clinical and methodological variability was expected among the included studies, particularly regarding patient populations, surveillance strategies, and nursing interventions. The random-effects approach described by DerSimonian and Laird (1986) was used to estimate pooled effects while accounting for between-study heterogeneity.

Meta-analytic calculations were conducted according to standard procedures outlined by Borenstein et al. (2009). Forest plots were generated to visually summarize pooled effect sizes and comparative outcomes across studies. Outcomes favoring intervention-based nursing management or surveillance strategies were represented by risk ratios below unity.

2.7 Assessment of Heterogeneity

Statistical heterogeneity among included studies was assessed using the I² statistic proposed by Higgins et al. (2003). The I² value estimates the proportion of total variability attributable to between-study heterogeneity rather than chance alone. Heterogeneity values of approximately 25%, 50%, and 75% were interpreted as low, moderate, and high heterogeneity, respectively.

Because the included studies varied in design, intervention type, and follow-up duration, moderate methodological heterogeneity was anticipated. Nevertheless, pooling was considered appropriate due to the shared clinical focus on AVF-related complications and nursing management outcomes.

2.8 Publication Bias Assessment

Potential publication bias was evaluated using funnel plot analysis. Funnel plot asymmetry was visually examined to identify possible small-study effects or selective reporting bias. The methodological approach described by Egger et al. (1997) guided the interpretation of publication bias patterns within the meta-analysis. Although formal regression testing was limited by the relatively small number of included studies, visual funnel plot assessment provided supplementary evidence regarding the overall stability and reliability of pooled findings.

2.9 Quality Considerations

Given the inclusion of randomized trials, retrospective cohort studies, and observational investigations, methodological quality varied across the evidence base. Particular attention was therefore given to study design rigor, reporting completeness, follow-up duration, and clarity of outcome measurement during evidence synthesis. Despite variations in study methodology, the included literature collectively provided sufficient evidence to evaluate trends in AVF complication prevention, surveillance effectiveness, cannulation safety, and nursing-led patient management strategies among hemodialysis populations.

3. Results

A total of 14 outcome comparisons derived from randomized controlled trials, retrospective cohort investigations, and surveillance-based observational studies were included in the present review and quantitative synthesis (Table 1). The included studies collectively evaluated the effectiveness of nursing-led interventions, cannulation strategies, surveillance approaches, and patient self-care programs on arteriovenous fistula (AVF) complications among hemodialysis populations. Across most datasets, structured nursing involvement appeared consistently associated with lower complication rates, improved fistula preservation, and better patient adherence outcomes.

3.1 Overall Effect of Nursing and Clinical Management Interventions

The pooled evidence demonstrated a general reduction in AVF-related adverse outcomes among intervention groups compared with standard or routine care controls (Table 2). Several studies reported markedly lower rates of thrombosis, infection, AVF dysfunction, and total complications following individualized nursing care, predictive monitoring, or integrated management strategies.

One of the strongest effects was observed in the retrospective cohort study by Ning et al. (2021), where integrated management reduced total fistula-related complications from 23.9% in the routine care group to only 3.6% in the intervention group. The calculated risk ratio (RR = 0.15, 95% CI: 0.04–0.53) suggested a substantial protective effect associated with coordinated nursing surveillance and long-term management practices. Similarly, the Chen et al.. (2021) randomized trial reported significantly fewer overall complications in patients receiving individualized nursing interventions than in those receiving routine care (RR = 0.22, 95% CI: 0.09–0.54). AVF dysfunction itself was also considerably reduced in the intervention arm (RR = 0.25, 95% CI: 0.10–0.60), highlighting the importance of structured nursing assessment and patient monitoring in maintaining vascular access patency.

Comparable trends were observed where predictive nursing strategies resulted in lower overall complication rates than conventional nursing approaches. Total complications decreased from 30.0% in the control group to 6.67% in the intervention group, with a pooled RR of 0.22 (95% CI: 0.05–0.94). Although thrombosis and infection outcomes individually showed wider confidence intervals due to smaller event numbers, both outcomes still numerically favored predictive nursing care. These findings collectively suggest that early recognition of vascular access abnormalities, frequent assessment, and individualized patient education may reduce the progression toward severe fistula dysfunction (Ning et al., 2021; Yu & Xu, 2021).

The broader trends across studies also aligned closely with the conceptual framework presented in the introduction, which emphasized the critical role of hemodialysis nurses in identifying early AVF abnormalities through inspection, palpation, and auscultation techniques. The findings therefore reinforce earlier observations that physical examination-based surveillance can provide clinically meaningful protection against access failure when applied systematically (Abreo et al., 2018; Jackson et al., 2018).

3.2 Thrombosis and Access Dysfunction Outcomes

Thrombosis remained one of the most clinically significant AVF complications reported throughout the included studies. Despite some variability between populations and follow-up durations, intervention-focused nursing care generally reduced thrombosis occurrence compared with standard care.

In the predictive nursing trial, no thrombosis events were reported in the intervention group, whereas two thrombosis cases occurred in the conventional care arm. Although the confidence interval was broad (RR = 0.20, 95% CI: 0.01–4.03), the directional trend still suggested a protective effect. Similarly, Abdelmohsen et al. (2017) found that implementation of a fistula self-care bundle reduced thrombosis events from 9 cases in the control group to 2 cases in the intervention group, producing a comparable RR of 0.22 (95% CI: 0.05–0.94).

Long-term surveillance studies further supported the importance of active vascular monitoring. Lok et al. (2003) reported lower thrombosis rates among patients undergoing blood-flow surveillance monitoring compared with standard care, while van Loon et al. (2010) documented relatively low thrombosis rates among patients managed using rope-ladder AVF cannulation approaches. These findings are particularly relevant because thrombosis is widely recognized as the final pathological consequence of untreated stenosis and progressive neointimal hyperplasia (Stolic, 2013).

Interestingly, several studies implied that thrombosis prevention may depend not only on clinical monitoring but also on patient engagement and adherence to AVF self-care behaviors. Higher self-care and knowledge scores reported by Ozen et al. (2016) and Sousa et al. (2015) appeared to coincide with improved vascular access maintenance outcomes, although direct causal relationships could not be firmly established.

3.3 Infection-Related Outcomes

Infection outcomes demonstrated greater variability across studies than thrombosis or overall complication rates. Some intervention strategies appeared to reduce infection incidence, whereas others—particularly buttonhole cannulation approaches—showed a tendency toward increased access-site infection risk.

Fewer infection cases in the predictive nursing group than in the conventional care group (RR = 0.33, 95% CI:

Table 1:  Study Characteristics and Extracted Outcome Data Included in the Meta-Analysis of Arteriovenous Fistula (AVF)-Related Complications in Hemodialysis Patients. This table summarizes the study design, intervention strategies, control groups, sample sizes, complication outcomes, event frequencies, and extracted effect measures from studies evaluating nursing-led management, surveillance approaches, cannulation techniques, and self-care interventions associated with AVF preservation and complication reduction in hemodialysis populations.

Table 2: Comparative Risk Ratios and Effect Estimates of Arteriovenous Fistula (AVF)-Related Complications Across Included Studies. This table summarizes pooled study-level outcomes comparing intervention and control groups for AVF-related complications, including thrombosis, infection, AVF dysfunction, hematoma, steal syndrome, and mortality. Risk ratios (RRs), 95% confidence intervals (CIs), standard errors (SEs), and study weights are presented to support quantitative meta-analysis and forest plot generation.

Figure 2:  Forest Plot of Pooled Risk Ratios for Arteriovenous Fistula (AVF)-Related Adverse Outcomes Across Included Studies. The forest plot presents the comparative effect estimates of intervention-based nursing management, surveillance strategies, and cannulation approaches versus routine care or standard management for AVF-related complications. Risk ratios (RRs) with 95% confidence intervals are displayed under a random-effects model, where values below unity favor intervention-based approaches for reducing thrombosis, infection, hematoma, AVF dysfunction, and overall complication rates.

Figure 3: Funnel Plot Assessing Potential Publication Bias and Small-Study Effects Among Included Studies Evaluating AVF-Related Complications. This funnel plot illustrates the distribution of included studies according to log risk ratios and standard errors for AVF-related adverse outcomes. The relatively symmetrical pattern around the pooled effect estimate suggests limited publication bias, although minor asymmetry among smaller studies may indicate methodological variability or small-study effects within the meta-analysis.

0.04–3.14). Abdelmohsen et al. (2017) similarly reported numerically fewer infections among patients receiving a structured fistula self-care bundle. Although the confidence intervals remained wide due to small event counts, the direction of effect again favored enhanced nursing intervention and patient education.

However, infection-related findings associated with buttonhole cannulation were less reassuring. Chow et al. (2011) found that access-site infections occurred more frequently in the buttonhole group than in the rope-ladder group (RR = 4.00, 95% CI: 0.47–34.02). Likewise, Struthers et al. (2010) reported a higher relative infection risk associated with buttonhole needling, although event numbers were low and statistical precision remained limited. In contrast, Kaplowitz et al. (1988) demonstrated relatively comparable infection rates between intervention and control groups (RR = 0.87, 95% CI: 0.25–2.98).

Taken together, these findings suggest that although buttonhole cannulation may improve patient comfort or facilitate repeated access in difficult fistulas, it may also increase susceptibility to localized or systemic infection when aseptic technique is inconsistent. This observation strongly supports current clinical recommendations discouraging improper repetitive puncture practices and emphasizing strict infection-control protocols during AVF cannulation (Gallieni et al., 2019; Pinto et al., 2021).

3.4 Hematoma, Steal Syndrome, and Other Complications

Several studies evaluated additional AVF-related complications beyond thrombosis and infection. Among these, hematoma formation emerged as a particularly important issue associated with cannulation technique.

MacRae et al. (2012) demonstrated that rope-ladder cannulation resulted in lower hematoma incidence than buttonhole cannulation. Hematoma rates were reduced from 35.7% in the rope-ladder control group to 17.1% in the intervention group, corresponding to a statistically favorable RR of 0.48 (95% CI: 0.26–0.88). This study carried the largest statistical weight in the pooled analysis (21.41%), suggesting that its findings substantially influenced the overall meta-analytic estimate.

Steal syndrome, although less commonly reported, was also addressed in the Abdelmohsen et al. (2017) study. Patients receiving the self-care intervention bundle experienced fewer steal syndrome events than those receiving routine care (RR = 0.50, 95% CI: 0.05–5.22). While the confidence interval was wide and crossed unity, the trend still hinted that closer monitoring and patient education might contribute to earlier symptom recognition and intervention.

Mortality outcomes were reported less frequently. Chow et al. (2011) documented slightly higher mortality events within the buttonhole group compared with rope-ladder cannulation (RR = 2.00, 95% CI: 0.19–21.06), although the extremely wide confidence interval limited interpretation. Nevertheless, the finding reinforces concerns that repeated localized trauma and infection risk may indirectly contribute to poorer long-term vascular access outcomes.

3.5 Findings from Comparative Nursing Intervention Studies

The comparative intervention analysis presented in Table 3 revealed remarkably consistent patterns favoring structured nursing care over routine management approaches. Across nearly all included trials, nursing-led interventions were associated with meaningful reductions in complication rates or improvements in patient-related outcomes.

For example, Chen et al. (2021) found that personalized nursing reduced total complications from 25.84% to 5.61% among elderly AVF patients. Qin et al. (2016) similarly reported lower perioperative complication rates among patients receiving professional nursing interventions than among those receiving standard care (17.4% vs. 37.0%). These findings collectively indicate that proactive nursing involvement extends beyond technical cannulation practices and may influence broader perioperative and long-term vascular outcomes.

Educational interventions also appeared beneficial. Atalla (2019) demonstrated substantial improvement in patient knowledge scores following structured AVF education programs, while Chen et al. (2021) reported markedly higher treatment compliance rates among patients receiving individualized nursing care (95.33% vs. 76.40%). Such improvements in patient engagement may partially explain the lower complication frequencies observed across intervention groups.

Interestingly, the evidence also suggested that successful AVF preservation likely depends on a combination of patient education, surveillance, technical cannulation skill, and multidisciplinary coordination rather than any single isolated intervention. This integrated perspective aligns closely with contemporary vascular access guidelines advocating continuous monitoring and collaborative care models for chronic hemodialysis patients (Gallieni et al., 2019).

3.6 Clinical Assessment and Surveillance Findings

The observational and surveillance-oriented findings summarized in Table 4 further highlighted the value of structured AVF assessment. Complication rates varied considerably between studies, but surveillance-focused strategies generally demonstrated favorable outcomes. Al-Jaishi et al. (2017), in a systematic review of autogenous AVFs, reported relatively low thrombosis and infection rates when clinical surveillance practices were routinely implemented. Likewise, Polkinghorne et al. (2006) demonstrated that blood-flow surveillance was associated with reduced stenosis-related complications during long-term follow-up. Preoperative assessment strategies were also emphasized. Alfano et al. (2017) reported AVF failure rates ranging from 23% to 37% among advanced chronic kidney disease populations, suggesting that early vascular mapping and individualized access planning remain essential components of successful AVF maturation.

The self-care findings were equally notable. Ozen et al. (2016) reported high patient knowledge levels regarding AVF management, while Sousa et al. (2015) documented favorable self-care behavior scores among chronic hemodialysis patients. These findings support the growing recognition that patient participation plays a major role in vascular access preservation and long-term dialysis success.

3.7 Forest Plot and Funnel Plot Interpretation

The forest plot analysis (Figure 2) demonstrated an overall pooled risk ratio of approximately 0.38 under the random-effects model, indicating that intervention-based nursing and surveillance strategies were generally associated with substantially lower AVF-related adverse outcomes compared with routine care. Most included studies showed effect estimates positioned to the left of the line of no effect, favoring intervention groups. The heterogeneity level appeared relatively modest (I² ≈ 19%), suggesting acceptable consistency among included studies despite differences in design, population characteristics, and intervention types.

The funnel plot (Figure 3) showed a moderately symmetrical distribution of studies around the pooled effect estimate, although slight asymmetry was visible among smaller studies with larger standard errors. This pattern may reflect limited publication bias, small-study effects, or the relatively low number of included trials. Nonetheless, the overall distribution did not suggest severe distortion of the pooled findings.

Overall, the synthesized evidence consistently suggested that structured nursing assessment, individualized patient management, surveillance-based monitoring, and evidence-based cannulation strategies can substantially reduce AVF-related complications while improving treatment adherence and vascular access preservation in hemodialysis populations.

4. Discussion

4.1 Clinical Assessment and Nursing Management of Arteriovenous Fistula Complications in Hemodialysis Patients

This systematic review synthesized evidence from randomized controlled trials, cohort investigations, surveillance studies, and clinical nursing interventions examining complications associated with arteriovenous fistulas (AVFs) in hemodialysis populations. Across the included studies, one pattern emerged quite consistently: structured nursing involvement, proactive surveillance, and patient-centered self-care strategies appeared to substantially improve vascular access outcomes while reducing many of the complications that commonly threaten AVF survival. Although the magnitude of benefit varied between studies, the overall direction of evidence strongly favored intervention-based approaches over routine or passive care models.The pooled findings presented in the forest plot (Figure 2) demonstrated an overall reduction in AVF-related adverse outcomes among intervention groups, with a pooled risk ratio of approximately 0.38 and relatively modest heterogeneity. This is clinically important because AVF dysfunction remains one of the major causes of hospitalization, repeated interventions, and vascular access loss among chronic hemodialysis patients. The findings therefore reinforce earlier observations that vascular access outcomes are not determined solely by surgical creation quality, but also by the consistency of post-operative surveillance, cannulation technique, and patient education practices (Al-Jaishi et al., 2017; Gallieni

Table 3: Comparative Clinical Outcomes of Nursing Interventions and Cannulation Strategies for Arteriovenous Fistula (AVF) Management in Hemodialysis Patients. This table summarizes the effects of individualized nursing care, predictive monitoring, integrated management, educational interventions, and cannulation techniques on AVF-related complications, treatment compliance, hematoma formation, infection rates, thrombosis prevention, and patient-centered vascular access outcomes across the studies

Table 4: Clinical Assessment Parameters, Surveillance Findings, and Complication Rates Associated with Arteriovenous Fistula (AVF) Management in Hemodialysis Populations. This table presents observational and surveillance-based findings related to AVF thrombosis, infection, stenosis, access failure, self-care behavior, patient knowledge, and vascular access monitoring methods across diverse hemodialysis populations and clinical follow-up settings.

et al., 2019).

One particularly notable finding was the repeated effectiveness of individualized or predictive nursing interventions. Studies by Ning et al. (2021), and Chen et al. (2021) consistently reported lower complication frequencies among intervention groups receiving structured assessment or integrated management approaches. In some cases, reductions were quite substantial. Ning et al. (2021), for example, reported that integrated management reduced fistula-related complications from nearly one-quarter of patients in routine care groups to less than 4% in the intervention group. Similarly, Chen et al. (2021) documented marked reductions in AVF dysfunction and total complications following individualized nursing care. These findings collectively suggest that early detection of subtle clinical abnormalities may interrupt the progression from stenosis to thrombosis before irreversible access failure occurs.

This observation aligns closely with the physiological mechanisms outlined in the introduction section. AVF dysfunction is often a progressive rather than sudden process. Neointimal hyperplasia gradually narrows the vascular lumen, reducing blood flow and eventually predisposing the access to thrombosis (Stolic, 2013). Nurses, because of their repeated and direct patient contact, are uniquely positioned to recognize early warning signs such as changes in thrill quality, abnormal bruit characteristics, swelling, prolonged bleeding, or signs of distal ischemia. The evidence synthesized here suggests that these clinical observations are not merely supportive practices but may genuinely alter patient outcomes when systematically implemented.

Another important finding of this review concerns the role of patient education and self-care. Several studies demonstrated that educational interventions improved both patient knowledge and vascular access outcomes. Atalla (2019) showed substantial increases in post-intervention AVF self-care knowledge scores, while Ozen et al. (2016) and Sousa et al. (2015) reported generally favorable levels of patient awareness and self-care behavior among hemodialysis populations. Although observational in nature, these findings imply that patients who understand how to protect their fistula may be more likely to recognize early complications, avoid harmful behaviors, and seek timely intervention.

This aspect may actually be more important than it initially appears. Hemodialysis patients spend the majority of their time outside the dialysis unit, meaning that day-to-day AVF preservation depends heavily on patient participation. Behaviors such as checking for a thrill, avoiding compression of the access arm, and maintaining hygiene around cannulation sites may collectively influence long-term access survival. In that sense, successful AVF preservation appears to function as a collaborative process between healthcare providers and patients rather than a purely clinical procedure.

Cannulation technique also emerged as a critical determinant of AVF complications. The comparison between buttonhole and rope-ladder techniques produced somewhat mixed findings, though the evidence leaned toward greater safety with rope-ladder approaches in several outcome domains. MacRae et al. (2012) reported significantly lower hematoma rates with rope-ladder needling, while Chow et al. (2011) and Struthers et al. (2010) observed increased infection tendencies among buttonhole groups. Although buttonhole cannulation may provide practical advantages in patients with limited cannulation areas or difficult access anatomy, the present review suggests that repeated use of identical puncture tracks may increase susceptibility to localized bacterial colonization and access-site infection.

Importantly, however, the evidence does not necessarily suggest that buttonhole cannulation should be universally avoided. Rather, it highlights the importance of strict aseptic technique and experienced nursing practice when buttonhole methods are selected. Several previous guidelines have similarly noted that infection risk associated with buttonhole cannulation can be minimized through rigorous infection-control protocols and standardized cannulation training (Gallieni et al., 2019; Pinto et al., 2021). Thus, the technique itself may not be inherently unsafe, but its effectiveness likely depends heavily on procedural consistency and staff expertise.

The findings related to thrombosis deserve particular attention because thrombosis remains one of the most devastating AVF complications. Multiple studies in this review demonstrated lower thrombosis rates in intervention groups, particularly among patients receiving predictive nursing care, blood-flow monitoring, or integrated management. The reductions observed by Abdelmohsen et al. (2017) are especially noteworthy because thrombosis often represents the terminal event following unrecognized stenosis. This suggests that surveillance strategies capable of detecting reduced flow or abnormal physical findings before clot formation may meaningfully preserve AVF patency.

The observational studies summarized in Table 4 also support the growing role of structured surveillance in vascular access management. Al-Jaishi et al. (2017) reported relatively low complication rates when clinical surveillance was routinely applied, while Polkinghorne et al. (2006) demonstrated that blood-flow monitoring could assist in identifying clinically significant stenosis. Interestingly, the review findings suggest that surveillance does not necessarily require highly sophisticated technology in every setting. Physical examination-based approaches—inspection, palpation, and auscultation—may still provide substantial diagnostic value when performed consistently and correctly. This is especially relevant for resource-limited dialysis centers where advanced imaging or Doppler surveillance may not always be readily available.

The funnel plot (Figure 3) showed moderate symmetry around the pooled effect estimate, suggesting that major publication bias was unlikely, though not completely absent. Some asymmetry was visible among smaller studies with wider standard errors, which may reflect small-study effects or differences in methodological rigor. Additionally, several included studies had relatively limited sample sizes, short follow-up periods, or incomplete reporting of statistical parameters. These limitations should be considered when interpreting the pooled estimates.

Another limitation of the evidence base involves the heterogeneity of interventions themselves. The included studies evaluated diverse strategies, including predictive nursing, integrated management, educational interventions, blood-flow surveillance, and different cannulation techniques. While all fall broadly under AVF management, they are not identical interventions. Consequently, some caution is necessary when interpreting pooled effect estimates across studies with substantially different methodologies and clinical objectives.

Furthermore, several outcomes—particularly infection, mortality, and steal syndrome—were characterized by relatively low event numbers. As a result, confidence intervals were sometimes very wide, reducing statistical precision. For example, infection-related outcomes in the buttonhole cannulation studies showed considerable variability and uncertainty. Larger multicenter trials with standardized outcome reporting may therefore be necessary to clarify the true magnitude of risk associated with specific cannulation techniques.

Despite these limitations, the overall findings of this review remain clinically meaningful. The collective evidence strongly indicates that AVF outcomes improve when nursing assessment is systematic, surveillance is proactive, and patient involvement is prioritized. Rather than functioning as isolated supportive measures, nursing-led interventions appear to play a central role in preserving vascular access integrity and reducing avoidable complications.

Ultimately, this review reinforces a broader shift in modern hemodialysis care—from reactive management of AVF failure toward earlier prevention, continuous surveillance, and collaborative patient-centered care. As the global burden of end-stage renal disease continues to rise, strengthening nursing competency in AVF assessment and expanding patient education programs may represent some of the most practical and cost-effective strategies for improving long-term hemodialysis outcomes.

5. Limitations

Several limitations should be considered when interpreting the findings of this review. First, the included studies varied considerably in design, intervention type, follow-up duration, and outcome reporting, which may have introduced methodological heterogeneity despite the use of a random-effects model. Second, some complication outcomes, particularly infection, mortality, and steal syndrome, were based on relatively small event numbers and wide confidence intervals, limiting statistical precision. Third, several included studies were observational or retrospective in nature, increasing susceptibility to selection bias and confounding. Additionally, publication bias could not be entirely excluded because only English-language studies were included. Finally, differences in cannulation practices, nursing protocols, and healthcare settings may limit the generalizability of the pooled findings across all dialysis populations.

6. Conclusion

The evidence synthesized in this review suggests that nursing-led AVF assessment and surveillance play a central role in reducing vascular access complications among hemodialysis patients. Structured monitoring, individualized patient education, and evidence-based cannulation practices were consistently associated with improved vascular access preservation and lower complication rates. Although some variability existed across studies, the overall findings support a shift toward more proactive and patient-centered AVF management strategies. Strengthening nursing competency in vascular access assessment and expanding standardized surveillance protocols may therefore contribute substantially to improving long-term hemodialysis outcomes and reducing preventable access failure.

Author Contributions

M.S.K. conceptualized the study, designed the review protocol, and developed the research framework. M.S.K. and H.A. conducted the literature search, study selection, data extraction, quality assessment, and evidence synthesis. M.S.K. performed the systematic review, data synthesis, interpretation of findings, and prepared the original manuscript. H.A. contributed to data validation, critical appraisal of the included studies, interpretation of the clinical implications, and critical revision of the manuscript. Both authors reviewed and approved the final manuscript and agreed to be accountable for all aspects of the work.

Acknowledgements

The authors sincerely acknowledge their respective institutions for providing academic support and access to the scientific literature used in this systematic review. They also extend their appreciation to the researchers whose published studies formed the foundation of this evidence synthesis. No specific funding was received for this study.

References