Abstract
Objectives
Comprehensive evaluation of lower-extremity varicose veins (VVs) in patients with diabetes is crucial for treatment strategizing. The study aims to assess the feasibility of using ferumoxytol-enhanced MR venography (FE-MRV) for lower-extremity venous mapping and the detection of VVs in patients with diabetes.
Materials and methods
As part of a phase II clinical trial of a generic brand of ferumoxytol, documented patients with diabetes were enrolled and underwent FE-MRV on a 3-Τ MRI system. Two observers assessed FE-MRV images for image quality, signal intensity ratio (SIR), perforator (PV) diameter, and luminal signal uniformity in deep-to-superficial venous networks with the assessment of intra- and inter-rater reliability. FE-MRV was used to detect lower-extremity VVs.
Results
Eleven patients underwent FE-MRV without adverse events. The average image quality, as scored by the two observers who assessed 275 venous segments, was 3.4 ± 0.6. Two observers strongly agreed on image quality (κ = 0.90) and SIR measurements (interclass correlation coefficient [ICC]: 0.72) and had good agreement on PV diameter (ICC: 0.64). FE-MRV revealed uniform luminal signals in deep and saphenous venous networks (0.13 ± 0.05 vs 0.08 ± 0.03). Below-knee segments exhibited a significantly higher heterogeneity index than above-knee (p = 0.039) segments. Superficial VVs were observed in 55% (12/22) of legs in 64% (7/11) of patients. Calf muscle VVs were present in 64% (14/22) of legs in 9 patients.
Conclusion
FE-MRV safely and robustly mapped entire lower-extremity venous networks, enabling the detection and pre-treatment evaluation of both superficial, and deep VVs in patients with diabetes.
Clinical relevance statement
Ferumoxytol-enhanced magnetic resonance venography offers a “one-stop” imaging strategy for the detection and pre-operative evaluation of both superficial and deep VVs in diabetic patients.
Key Points
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Diabetic patients with VVs are at a higher risk of ulcer-related complications.
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FE-MRV allowed rapid and comprehensive visualization of the lower-limb venous networks and abdominopelvic veins in diabetic patients.
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This technique allowed for the detection of superficial and deep VVs in diabetic patients before the development of severe peripheral artery disease.
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Abbreviations
- CI:
-
Confidence interval
- CKD:
-
Chronic kidney disease
- CPR:
-
Curved multiplanar reconstruction
- CTV:
-
CT venography
- CVD:
-
Chronic venous diseases
- DUS:
-
Duplex ultrasonography
- DVT:
-
Deep venous thrombosis
- FDA:
-
Food and Drug Administration
- FE-MRV:
-
Ferumoxytol-enhanced MR venography
- Gd-MRV:
-
Gadolinium-enhanced magnetic resonance venography
- GSV:
-
Great saphenous vein
- ICC:
-
Interclass correlation coefficient
- IVC:
-
Inferior vena cava
- MPR:
-
Multiplanar reconstruction
- PAD:
-
Peripheral artery disease
- PVs:
-
Perforating veins
- ROI:
-
Region of interest
- SD:
-
Standard deviation
- SIR:
-
Signal intensity ratio
- SSV:
-
Small saphenous vein
- USPIO:
-
Ultrasmall superparamagnetic iron oxide
- VVs:
-
Varicose veins
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Acknowledgements
The authors thank Zhenyue Gao and Jinling Xue of Chia Tai Tianqing Pharmaceutical Group Co., Ltd. for their assistance. Chia Tai Tianqing Pharmaceutical Group Co., Ltd. supplied ferumoxytol free of charge.
Funding
This work was supported by the National Nature Science Foundation of China (No. 2021YFC2501100 and 92249301), the Beijing Research Ward Demonstration Construction Project (No. BCRW202110), and the Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding (No. ZLRK202306).
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The scientific guarantor of this publication is Qi Yang.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
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No complex statistical methods were necessary for this paper.
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Written informed consent was obtained from all subjects in this study.
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This study was approved by the institutional review board (REC reference: 2021-LHKY-104-02).
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None study subjects or cohorts have been previously reported.
Methodology
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Observational
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Single-center study
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Liu, Y., Cao, B., Wang, X. et al. Ferumoxytol-enhanced MR venography for mapping lower-extremity venous networks and evaluating varicose veins in patients with diabetes. Eur Radiol (2024). https://doi.org/10.1007/s00330-024-10772-x
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DOI: https://doi.org/10.1007/s00330-024-10772-x