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Journal of Korean Neurosurgical Society > Volume 6(1); 1977 > Article
Journal of Korean Neurosurgical Society 1977;6(1): 61-68.
Radiological Measurement of Interpediculate Distance of Each Thoracic Vertebra in Normal Adults.
Il Gyu Yun
Department of Neurosurgery, Busan National University, School of Medicine, Korea.
ABSTRACT
In 1934 Elsberg and Dyke published normal values for interpediculate distances as determined on roentgenograms of adult human spine. It has since proved invaluable in the roentgenologic diagnosis of spinal abnormalities and meningeal or cord lesion. Since 1942 the attempts at obtaining the interpediculate distances of children have been made. In 1943 Landmesser & Heublein prepared measurements of interpediculate distances using roentgenograms of selected children from the population of a home and hospital for crippled children, and in 1955 Simril and Thurston published maximum & minimum normal interpediculate distances of infants and children. But Schwarz published extreme upper limits of normal interpediculate disctances in children and adults adding measurements of the sacral spinal canal. Nagashima reported that sagittal & transverse diameters of spinal canal were measured in dried speciemens of normal adults vertebras. Many pioneer studies have established the clinical values of the interpediculated measurements in the diagnosis of intraspinal diseases at all ages. The present investigation was undertaken to provide refined maximal normal interpediculate measurements for use in diagnosis of intraspinal tumor and anomalies and minimem norms for recognition of spinal stenosis. It was also decided to show the results of normal interpediculate distances in adult Korean. The results were the followings : 1) The interpediculate distances from T1 to T12 in male were 22.6, 19.9, 18.3, 17.6, 16.9, 17.1, 17.3, 17.3, 17.3, 18.1, 19.8 and 22.7mm respectively, and in female 21.3, 18.4, 17.7, 17.4, 17.2, 17.0, 17.0, 16.9, 17.0, 17.1, 18.4, and 21.5mm. In male and female combined these were 22.3, 19.4, 18.1, 17.5, 17.0, 17.1, 17.2, 17.2, 17.4, 17.8, 19.4, and 22.3mm respectively. 2) The contour of thoracic canal was biconcave due to the fact that the interpediculate distances of T1 to T4 and T9 to T12 were generally larger than those of T5 to T8. 3) Average measurements in male were consistently larger than in female by about 1mm. 4) Compared with the measurements of Nagashima and Hinck, the IPD mean values for male were 1.1mm smaller than those of Hinck, and 0.6mm smaller than those of Nagashima, but for female 1.2mm smaller than those of Hinck, 0.3mm larger those of Nagashima. For male and female combined IPD were 0.8mm and 0.3mm smaller than those of Hinck and Nagashima respectively.
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