Abstract
<title>Abstract</title> <p> <bold>Background:</bold> Data on contrast medium usage and disposal during neurointerventional procedures are limited. <bold>Purpose:</bold> This study quantifies the volume and proportion of provided and disposed contrast medium for neurointerventional procedures. <bold>Material and Methods:</bold> In this prospective observational study conducted at a tertiary care hospital, contrast medium usage and disposal were measured across neurointerventional procedures over a 90-day period. Data included contrast used for manual DSA runs and 3D rotational angiographies with a power injector, as well as unused contrast medium disposal. <bold>Results:</bold> A total of 100 neurointerventional procedures were performed from April 1st to June 30th, 2025. On average, 166.5 ± 64.4 mL of contrast medium was provided per procedure, with 58.6 ± 37 mL (35.2%) disposed. The lowest mean provided volume was observed in endovascular treatment of intracranial vasospasm (116.7 ± 40.8 mL), and the lowest mean used volume in carotid artery stenting (75 ± 21.9 mL). Embolization procedures with liquid embolics showed the lowest disposed volume and rate (34.4 ± 32.7 mL, 27%), whereas embolization procedures with coils, flow-diverters, or intraaneurysmal flow-disruptors had the highest provided volume (234.2 ± 60.2 mL) and disposal rate and volume (38.4%, 90 ± 27.6 mL). Disposal rates ranged from a minimum of 23.3% for manual DSA runs to a maximum of 71.4% for 3D rotational angiographies with a power injector. <bold>Conclusion:</bold> Neurointerventional procedures require considerable amounts of contrast medium, with disposal rates and volumes varying notably based on procedural complexity and the method of administration (manual vs. power injector). </p>