4.4 Article Proceedings Paper

Utility of unilateral versus bilateral venous reflux studies for venous insufficiency

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DOI: 10.1016/j.jvsv.2021.01.004

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Vascular laboratory; Venous insufficiency; Venous reflux study

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The majority of bilateral ultrasound scans for venous insufficiency do not result in interventions. Therefore, most patients (95%) could have undergone a unilateral scan before the initial intervention instead of bilateral duplex ultrasound scanning.
Objective: Duplex ultrasonography is the reference standard for diagnosing chronic venous insufficiency. Bilateral venous reflux ultrasound studies are among the most time-consuming and physically demanding tests for vascular ultrasound technologists to perform. Furthermore, if a venous procedure is required, many insurance policies require that a diagnostic venous ultrasound scan for reflux must be performed within 1 year of the procedure. If the intervention is scheduled for >1 year after the ultrasound scan, the insurance company might require a repeat venous ultrasound scan before granting insurance authorization. Hence, ordering bilateral venous duplex ultrasound scans to evaluate for reflux when an intervention might only be performed on one limb within the year could be a waste of time and resources. The aim of the present study was to determine the utility of ordering bilateral vs unilateral studies to evaluate for reflux in patients with suspected chronic venous insufficiency and to determine whether a resource-saving potential exists for vascular laboratories through optimization of the process of ordering venous duplex ultrasound studies. Methods: A retrospective review of all patients who had undergone bilateral lower extremity ultrasound scanning to evaluate for reflux from January 1, 2016 to December 31, 2016 at the Massachusetts General Hospital vascular laboratory was performed. The demographics, indications for ultrasound scanning, comorbidities, time required to perform the ultrasound study, and interval to intervention were documented. The data were analyzed using SPSS statistical software (IBM Corp, Armonk, NY). Results: During the study period, 13,854 ultrasound studies had been performed in our vascular laboratory, of which 606 (4.4%) had been bilateral ultrasound scans for venous insufficiency. The time allotted for a bilateral study was 2 hours. Of the 606 studies evaluated, 152 (25.1%) showed no evidence of reflux, 284 (46.9%) showed bilateral lower extremity reflux, and 170 (28.1%) showed only venous insufficiency in one leg. Venous ablation, phlebectomy, and/or sclerotherapy were performed for 28.7% of the patients. However only 6.2% of patients had undergone venous procedures on both legs within 1 year after the ultrasound studies. Ablation was the most common procedure performed (54.6%), followed by phlebectomy (27.%) and sclerotherapy (17.9%). Overall, 94.7% of patients had not undergone a venous procedure on both legs within 1 year after the ultrasound studies and, hence, would have required a repeat duplex ultrasound scan to ensure insurance coverage for future procedures. Conclusions: Most bilateral ultrasound scans for venous insufficiency will not result in an intervention. Thus, most patients (95%) could have undergone a unilateral scan before the initial intervention instead of bilateral duplex ultrasound scanning.

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