JOURNAL OF SHANDONG UNIVERSITY (OTOLARYNGOLOGY AND OPHTHALMOLOGY) ›› 2015, Vol. 29 ›› Issue (5): 55-61.doi: 10.6040/j.issn.1673-3770.0.2015.124

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The groove behind the palatovaginal canal: a landmark for identification of the palatovaginal canal

MENG Qingguo1, LU Yongtian1, WU Xiaoliu2, LI Jianxing3, SUN Huanji1, ZHANG Baoying1, XIE Chang1   

  1. 1. Department of Otolarygology Head and Neck Surgery, Shenzhen Second Hospital, Shenzhen 518035, Guangdong, China;
    2. Department of Radiology, Shenzhen Second Hospital, Shenzhen 518035, Guangdong, China;
    3. Department of Otolarygology Head and Neck Surgery, Shenzhen Longhua New District Central Hospital, Shenzhen 518100, Guangdong, China
  • Received:2015-03-17 Revised:2015-07-09 Online:2015-10-16 Published:2015-10-16

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Abstract: Objective To explore the groove behind the palatovaginal canal (PVC) is a critical landmark for safe identification of the PVC during endoscopic endonasal transpterygoid approaches and transfer CT scan of the pterygopalatine fossa. Methods Probes were inserted thorough the PVC of 20 dry skulls. The PVC and the groove behind it were proved on MSCT, meanwhile a comparative study was also carried out by the traditional method to identificate the PVC. Dissection of two skulls and cadaveric heads was performed to demonstrate the endoscopic anatomy of the PV canal and tbe groove. Results The grooves can be found in all 20 dry skulls and appeared as groof near the posterior opening of PV canal. 26 sids were deep while 14 sides were dimple. Mainly appeared as tube-shaped (24 sides) or ovoid dimple-shaped (16 sides). In CT scan, the average angle between PVS and the hard palate was 53.14±5.48°, while between the groove and the hard palate was 20.93±6.28°. There was also statistical difference for identification of the PVC in transfer CT between the traditional method and the method assisting with the groove. Anatomic steps and foundations for dissection of the PVC while using the groove as a landmark were described. Conclusion Anatomic investigation, radiologic studies and comparison between the methods for identification of the PVC demonstrate the important anatomic relationship of the PVC with the groove, and reveal the groove as a landmark in endoscopic endonasal transpterygoid approaches and transfer CT scan of the pterygopalatine fossa.

Key words: Palatovaginal canal, Vomerovaginal canal, Groove behind the palatovaginal canal, Pterygopalatine fossa, Endoscopy, Vidian canal, Multi-slice spiral computed tomography

CLC Number: 

  • R762
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