The Anatomical Relationship between the Anterior Ethmoid Artery, Frontal Sinus, and Intervening Air Cells; Can the Artery Be Useful Landmark?

Young-Bum KO; Myung-Gu KIM; Yong-Gi JUNG

BACKGROUND AND

OBJECTIVES:

The anatomy surrounding the frontal sinus (FS) and the anterior ethmoid artery (AEA) is variable and complex. We tried to determine the value of AEA as a landmark for finding FS during endoscopic sinus surgery. SUBJECTS AND

METHOD:

Using the high-resolution CT scans of coronal and sagittal reconstruction, the distance between AEA and FS (D-AF) and the number and type of intervening cells between these two structures were investigated. Next, the distance between AEA and the anterior skull base (D-AS) was measured and the correlation between D-AF and D-AS was analyzed.

RESULTS:

A total of 119 nasal cavities from 70 subjects was analyzed. Of these analyzed, AEA was located just behind the frontal recess in only 17 nasal cavities (14%) and one or two intervening cells were located between FS and AEA in the remaining 86% of the nasal cavities. The most frequent type of intervening cells was supra bullar cell, followed by supraorbital and frontal bullar cells. The mean D-AF and D-AS measurements were 8.58+/-5.56 mm (0-22.6 mm) and 1.65+/-1.90 mm (0-6.7 mm), respectively. D-AS was not significantly correlated with the distance between the FS and AEA (p=0.433), therefore, D-AS could not be predicted.

CONCLUSION:

The relationship between FS and AEA was non-predictable, and in most cases, there were one or two intervening cells between FS and AEA. Therefore a thorough review of thin section CT scans is necessary.

Biblioteca Virtual en Salud

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