[Imaging study on supratrochlear artery and its application in nasal reconstruction]

Abstract

Objective: To study the image of the muscular and cutaneous branches of supratrochlear artery by internal and external carotid angiography and to design the frontal flap for nasal reconstruction.

Methods: The muscular and cutaneous branches of supratrochlear artery of 30 adults were investigated through internal and external carotid angiography and three-dimensional reconstruction of vessels to explore the courses of branches of supratrochlear artery and their communication with supraorbital artery. According to image observation, the frontal flap was designed and used to perform nasal reconstruction in 11 cases of nasal defects, including 7 males and 4 females with an average age of 23 years (range, 15-48 years). The nasal defect ranged from 3.0 cm x 2.5 cm to 5.0 cm x 3.5 cm.

Results: Internal carotid angiography and three-dimensional imaging of the vessels showed that supratrochlear artery was found in 30 patients, with a diameter of (0.9 +/- 0.6) mm. The superficial cutaneous branch appeared constantly with a diameter of (0.7 +/- 0.3) mm. Deep muscular branch traveled among frontal muscle, with a diameter of (0.5 +/- 0.5) mm and a length of (32.0 +/- 6.2) mm, and it was missing in 4 patients, the branches communicated with each other and with supraorbital artery. All flaps survived with good appearance and without cartilage exposure. After 4 months to 3 years of follow-up, the postoperative aesthetic appearance and function of nasal tip, alar, and columella were satisfactory; the height and slope length of the external nose were moderate; and the reconstructed nose had good texture and normal ventilation function without constriction of naris.

Conclusion: Imaging studies support the fact that supratrochlear artery has constant cutaneous branch. The application of frontal flap pedicled with cutaneous branch can improve the effectiveness of nasal reconstruction.