Effect of interventional embolization based on absolute ethanol for peripheral arteriovenous malformations.

Background: Interventional embolization schedules based on absolute ethanol are usually used for peripheral arteriovenous malformations (PAVMs), and clinicians often choose the scheme according to the classification.
Aim: To evaluate different interventional embolization schedules based on absolute ethanol for PAVMs.
Methods: A retrospective study was performed of 165 patients with PAVMs treated with interventional embolization based on absolute ethanol in Henan Provincial People's Hospital from January 2018 to May 2021. PAVMs were classified as type II ( n  = 67), type III ( n  = 81) and type IV ( n  = 17) according to the Yakes classification system, including 123 maxillofacial, 13 trunk and 29 limbs. Effectiveness of embolization was based on PAVM devascularization on angiography: 100% (total), 90%~99% (near-total), 70%~90% (substantial), 30%~70% (partial) and 0%~30% (failure).
Results: PAVMs were classified as type II ( n  = 67), type III ( n  = 81) and type IV ( n  = 17) according to the Yakes classification system, including 123 maxillofacial (74.55%), 13 trunk (7.88%) and 29 limbs (17.58%). There are statistical differences in the angiographic outcomes among different Yakes classification and between different methods ( P  < 0.05), and there was a statistical difference in the failure rates among different Yakes classification ( P  < 0.05).
Conclusions: PAVMs occur maxillofacial usually, and Type II can achieve better effect by spring coil and absolute ethanol, while Type III and Type IV have no ideal effect by Pingyangmycin + iodized oil + PVA + absolute ethanol and spring coil + absolute ethanol, respectively. Both the two happen to be complications, and wound accounts the highest.