Neurosurgery, Heping Hospital Affiliated to Changzhi Medical College, No. 110, Yan'an South Road, Changzhi City, Shanxi Province, 046000, China.
Department of Otolaryngology, Shenzhen Longgang Otolaryngology hospital & Shenzhen Otolaryngology Research Institute, Shenzhen City, Guangdong Province, China.
Eur Arch Otorhinolaryngol. 2024 Dec;281(12):6469-6476. doi: 10.1007/s00405-024-08932-2. Epub 2024 Sep 16.
The aim of this study is to describe the maximum exposure of the infraorbital region via the orbital floor using the transnasal prelacrimal recess approach (PLRA), and to provide an anatomical basis for treating lesions in the infraorbital region.
Ten freshly injected frozen heads were dissected using the PLRA. The orbital floor was removed along the border of the medial infraorbital quadrangle, and the periorbita was opened to expose the infraorbital region. The areas of the medial infraorbital quadrangles were measured and analyzed. The PLRA was applied separately on the left and right sides of each cadaver head, resulting in a total of 20 prelacrimal recess approaches.
The PLRA enabled visualization of the optic nerve and the central retinal artery through the orbital floor. By integrating both medial and lateral approaches in relation to the inferior rectus muscle, all crucial anatomical structures within the infraorbital region could be clearly identified. The area of the medial infraorbital quadrangle was 420.65 ± 24.03 mm.
The PLRA provides access through the orbital floor to the maximum boundary of the infraorbital region, including the lateral orbital wall at the outermost level, the superior rectus muscle at the topmost level, and the medial orbital wall at the innermost level.
本研究旨在通过经鼻前泪嵴隐窝入路（PLRA）描述眶下区域的最大暴露范围，并为治疗眶下区域病变提供解剖学基础。
采用 PLRA 对 10 个新鲜注射冷冻头颅进行解剖。沿内下眶四边形内侧边界切除眶底，切开眼轮匝肌筋膜以暴露眶下区。测量并分析内下眶四边形的面积。在每个尸头的左右两侧分别进行 PLRA，共进行了 20 次前泪嵴隐窝入路。
PLRA 可通过眶底观察视神经和视网膜中央动脉。通过整合内、外侧入路与下直肌的关系，可以清楚地识别眶下区域内所有关键的解剖结构。内下眶四边形的面积为 420.65±24.03mm。
PLRA 通过眶底提供了通向眶下区域最大边界的通道，包括最外侧的眶外侧壁、最上侧的上直肌和最内侧的眶内侧壁。
