During fistulography to treat a stenosis, venography may reveal a narrowing that may represent a stenosis or vasospasm. Preprocedural US has the added advantage of differentiating structural stenoses from transient self-limiting vasospasm [32]. Duplex Doppler US can aid monitoring of the response postangioplasty or stenting. The extent of residual stenoses postangioplasty may also be accurately quantified [33]. Dialysis Fistula Malfunction CTA Extremity Area of Interest With IV Contrast CT angiography (CTA) represents an alternative diagnostic study for many peripheral vascular interventions. However, it carries practical and logistical limitations in imaging of dialysis access imaging. Li et al [11] conducted a meta-analysis with the goal of comparing the diagnostic efficacy of CTA and MR angiography (MRA) in the assessment of autologous hemodialysis accesses and the detection of culprit stenoses. Both CTA and MRA were demonstrated to be accurate modalities with sensitivities of 96.2% and 95.4%, specificities of 97.1% and 96.1%, as well as diagnostic odds ratio of 393.69 and 211.47, respectively, in imaging hemodialysis vascular accesses. Even in subgroup and meta-regression analyses, no statistical difference relative to the 2 modalities was demonstrated. As such, there were no statistically significant differences when comparing the diagnostic performance of MRA and CTA in the detection of stenoses within hemodialysis vascular accesses. Both techniques serve as highly accurate alternatives or as trouble-shooting diagnostic complements to conventional DSA. An advantage of MDCT angiography is that it may facilitate 3-D volume data that provides multiple different views that help to overcome the challenge of vessel overlap experienced in DSA [17]. Wasinrat et al [17] reported that DSA posed a limitation in facilitating stenosis detection on 2-D projection in the coronal view.
Dialysis Fistula Malfunction. During fistulography to treat a stenosis, venography may reveal a narrowing that may represent a stenosis or vasospasm. Preprocedural US has the added advantage of differentiating structural stenoses from transient self-limiting vasospasm [32]. Duplex Doppler US can aid monitoring of the response postangioplasty or stenting. The extent of residual stenoses postangioplasty may also be accurately quantified [33]. Dialysis Fistula Malfunction CTA Extremity Area of Interest With IV Contrast CT angiography (CTA) represents an alternative diagnostic study for many peripheral vascular interventions. However, it carries practical and logistical limitations in imaging of dialysis access imaging. Li et al [11] conducted a meta-analysis with the goal of comparing the diagnostic efficacy of CTA and MR angiography (MRA) in the assessment of autologous hemodialysis accesses and the detection of culprit stenoses. Both CTA and MRA were demonstrated to be accurate modalities with sensitivities of 96.2% and 95.4%, specificities of 97.1% and 96.1%, as well as diagnostic odds ratio of 393.69 and 211.47, respectively, in imaging hemodialysis vascular accesses. Even in subgroup and meta-regression analyses, no statistical difference relative to the 2 modalities was demonstrated. As such, there were no statistically significant differences when comparing the diagnostic performance of MRA and CTA in the detection of stenoses within hemodialysis vascular accesses. Both techniques serve as highly accurate alternatives or as trouble-shooting diagnostic complements to conventional DSA. An advantage of MDCT angiography is that it may facilitate 3-D volume data that provides multiple different views that help to overcome the challenge of vessel overlap experienced in DSA [17]. Wasinrat et al [17] reported that DSA posed a limitation in facilitating stenosis detection on 2-D projection in the coronal view.