OBJECTIVES/HYPOTHESIS: To define transnasal endoscopic surgical landmarks for the parapharyngeal segment of the internal carotid artery (ppICA) using radiographic analysis and cadaveric dissection. STUDY DESIGN: Cadaveric and radiographic study. METHODS: One hundred seventy-nine computed tomography angiography studies of the head and neck were analyzed using Osirix third-party software (Pixmeo, Geneva, Switzerland). Dissection of a cadaveric specimen was used as a correlate to radiographic findings. The posterior aspect of the lateral pterygoid process and posterior border of the mandibular ramus were used as bony landmarks for the ppICA. RESULTS: At the level of the nasal floor, the distance from the ppICA to the posterolateral pterygoid process and to the posterior mandibular ramus was 2.36 cm and 1.94 cm, respectively, in males, and 2.37 cm and 1.99 cm, respectively, in females. At the level of the skull base, the distance from the ppICA to the posterolateral pterygoid process and to the posterior mandible was 2.33 cm and 1.49 cm, respectively, in males, and 2.20 cm and 1.57 cm, respectively, in females. Cadaver dissection demonstrated the utility of identifying these landmarks. CONCLUSIONS: The posterior border of the mandibular ramus and the posterolateral aspect of the pterygoid process may serve as consistent bony landmarks for identification of the ppICA.
OBJECTIVES/HYPOTHESIS: To define transnasal endoscopic surgical landmarks for the parapharyngeal segment of the internal carotid artery (ppICA) using radiographic analysis and cadaveric dissection. STUDY DESIGN: Cadaveric and radiographic study. METHODS: One hundred seventy-nine computed tomography angiography studies of the head and neck were analyzed using Osirix third-party software (Pixmeo, Geneva, Switzerland). Dissection of a cadaveric specimen was used as a correlate to radiographic findings. The posterior aspect of the lateral pterygoid process and posterior border of the mandibular ramus were used as bony landmarks for the ppICA. RESULTS: At the level of the nasal floor, the distance from the ppICA to the posterolateral pterygoid process and to the posterior mandibular ramus was 2.36 cm and 1.94 cm, respectively, in males, and 2.37 cm and 1.99 cm, respectively, in females. At the level of the skull base, the distance from the ppICA to the posterolateral pterygoid process and to the posterior mandible was 2.33 cm and 1.49 cm, respectively, in males, and 2.20 cm and 1.57 cm, respectively, in females. Cadaver dissection demonstrated the utility of identifying these landmarks. CONCLUSIONS: The posterior border of the mandibular ramus and the posterolateral aspect of the pterygoid process may serve as consistent bony landmarks for identification of the ppICA.
Authors: Gretchen M Oakley; Jareen Ebenezer; Aneeza Hamizan; Peta-Lee Sacks; Darren Rom; Raymond Sacks; Mark Winder; Andrew Davidson; Charles Teo; C Arturo Solares; Richard J Harvey Journal: J Neurol Surg B Skull Base Date: 2017-11-27
Authors: Nyall R London; Abdulaziz AlQahtani; Siani Barbosa; Paolo Castelnuovo; Davide Locatelli; Aldo Stamm; Aaron A Cohen-Gadol; Hussam Elbosraty; Roy Casiano; Jacques Morcos; Ernesto Pasquini; Georgio Frank; Diego Mazzatenta; Garni Barkhoudarian; Chester Griffiths; Daniel Kelly; Christos Georgalas; Trichy N Janakiram; Piero Nicolai; Daniel M Prevedello; Ricardo L Carrau Journal: Laryngoscope Investig Otolaryngol Date: 2021-07-17