Journal Article

E-263 A human cadaveric angiographic study of the orbital branches of the middle meningeal artery

Krishnan, N, Orscelik, A, Kumar, P, Senol, Y, Jun, T, Liu, A, Asghariahmadabad, M, Savastano, L

2025

Overview

Background/ObjectiveUnderstanding the prevalence and angioarchitecture of orbital branches of the middle meningeal artery (MMA), such as the meningolacrimal anastomosis (MLA), is critical to safely perform MMA embolizations. The diminutive size of these dural branches have limited the capacity to perform detailed dissection studies, and clinical angiographies likely underdiagnose the prevalence of these branches given the competing arterial flow from the orbit. We conducted a human cadaveric study to quantify the frequency and anatomical parameters of MLA by performing isolated high resolution angiography and DynaCTs of the MMA.MethodsAngiographies and Dyna CT were performed by navigating microcatheters and injecting iodinated contrast in the extracranial MMA in eight (8) human cadaveric specimens. Native and reconstructed images were analyzed for prevalence and morphometric variations.ResultsThe MLA was identified in 15 of 16(93.7%) specimens. Among these, 87.5% had a single ML branch per MMA, while 12.5% had more than one branch. The mean length of the dural segment of the MLA (from the origin at the MMA to the entry into the orbit) was 1.77 ± 0.70 cm. The mean diameter of the MLA was 0.93 ± 0.29 mm, and the MMA diameter at the origine of the MLA measured 2.15 ± 0.51 mm.ConclusionOrbital branches from the MMA are highly prevalent and must be accounted for at the time of selecting embolization agents and devices during MMA embolization.Abstract E-263 Figure 1DisclosuresY. Senol: None. M. Asghariahmadabad: None. A. Liu: None. N. Krishnan: None. P. Kumar: None. A. Orscelik: None. T. Jun: None. L. Savastano: None.

• Publisher: BMJ Publishing Group LTD
• Subject: Embolization