Ali Fahir Ozer1, Tuncer Suzer2, Halil Can3, Mani Falsafi4, Murat Aydin5, Mehdi Sasani2, Tunc Oktenoglu2. 1. Koc University Medical School, Neurosurgery Department, Istanbul, Turkey. Electronic address: alifahirozer@gmail.com. 2. Koc University Medical School, Neurosurgery Department, Istanbul, Turkey. 3. Koc University Medical School, Neurosurgery Department, Istanbul, Turkey; Private Pendik Yüzyıl Hospital, Neurosurgery Department, Istanbul, Turkey. 4. Koc University Medical School, Neurosurgery Department, Istanbul, Turkey; Iran University of Medical Science, Hazrat Rasoul Medical Complex, Spine Surgery Division, Tehran, Iran. 5. Koc University Medical School, Neurosurgery Department, Istanbul, Turkey; Izmir Bozyaka Research and Training Hospital, Neurosurgery Department, Izmir, Turkey.
Abstract
BACKGROUND: The relationship of exiting root and Kambin's triangle is discussed in this article. Transforaminal endoscopic surgery as the gold standard of less invasive lumbar disc surgeries is performed through Kambin's triangle. Existing root damage is one of the most important complication for this type of surgery. Anatomic variations in Kambin's triangle may be the main reason for nerve root damage during endoscopic lumbar disc surgery. METHODS: Kambin's triangle was investigated with surgical views and cadaver studies. Thirty-four patients with far lateral disc herniation were treated with an extraforaminal approach under the microscope. On the other hand, 48 Kambin's triangles were dissected on 8 cadavers. Three main types of triangle were identified, and patients were grouped according to these 3 types of the triangle. RESULTS: Only 6 of the 34 patients had type 3 triangles, which is the wide classical triangle described by Kambin; however, 17 patients had type 2, with a narrow space in the triangle, and 11 patients had type 1, with no space inside the triangle. Cadaver results were similar; only 10 of the 48 specimens had the type 3 classical triangle, whereas 23 specimens had type 2, and 15 specimens had type 1 triangles. Our results disclosed narrowed or no space in 82.4% of the patients and 79.2% of the cadavers. CONCLUSION: We observed that a wide and safe room of the triangle may not be exist in some patients. Therefore, more care must be taken during endoscopic lumbar disc surgery to avoid nerve damage.
BACKGROUND: The relationship of exiting root and Kambin's triangle is discussed in this article. Transforaminal endoscopic surgery as the gold standard of less invasive lumbar disc surgeries is performed through Kambin's triangle. Existing root damage is one of the most important complication for this type of surgery. Anatomic variations in Kambin's triangle may be the main reason for nerve root damage during endoscopic lumbar disc surgery. METHODS: Kambin's triangle was investigated with surgical views and cadaver studies. Thirty-four patients with far lateral disc herniation were treated with an extraforaminal approach under the microscope. On the other hand, 48 Kambin's triangles were dissected on 8 cadavers. Three main types of triangle were identified, and patients were grouped according to these 3 types of the triangle. RESULTS: Only 6 of the 34 patients had type 3 triangles, which is the wide classical triangle described by Kambin; however, 17 patients had type 2, with a narrow space in the triangle, and 11 patients had type 1, with no space inside the triangle. Cadaver results were similar; only 10 of the 48 specimens had the type 3 classical triangle, whereas 23 specimens had type 2, and 15 specimens had type 1 triangles. Our results disclosed narrowed or no space in 82.4% of the patients and 79.2% of the cadavers. CONCLUSION: We observed that a wide and safe room of the triangle may not be exist in some patients. Therefore, more care must be taken during endoscopic lumbar disc surgery to avoid nerve damage.
Authors: Gaston Oscar Camino Willhuber; Mariana Bendersky; Carolina Vilte; Gonzalo Kido; Matias Pereira Duarte; Martin Estefan; Julio Bassani; Matias Petracchi; Marcelo Gruenberg; Carlos Sola Journal: Rev Fac Cien Med Univ Nac Cordoba Date: 2021-08-23