Torg’s ratio in normal adult nepalese population

Abstract

Introduction: Acute cervical trauma occasionally leads to cervical canal stenosis in some individuals in spite of minor trauma. The spinal canal-to-vertebral body ratio (Torg-Pavlov ratio) has been proposed for assessing developmental spinal canal stenosis. It is not affected by magnification, and is measured on lateral plain films of cervical vertebrae. The result of this study may help in better understanding of the Torg's ratio, which is more reliable than direct measuring of the mid-sagittal diameter of the cervical spinal canal in the diagnosis of cervical spinal stenosis or predicting the prognosis of cervical spinal cord injury. If Torg's ratio is below normal there is risk of cervical cord injury whereas relatively safe in large Torg's ratio. Torg's ratio can be accessed even in rural areas where x-rays are easily available and more economical than MRI and CT scan. It can assess the risk of cord injury during sports and outdoor activities and help individuals' choose safe carrier in sports or others activities.

Morphometry of Dry Sub Axial Vertebra: A Nepalese Study

“…The values of the present study was comparable to that of the work done by Rijal B et al (0.99±0.09 to 1.01±0.07mm) and larger to that reported by Singh et al (0.97±0.13mm). 10,12 In the cervical spine, the span of TR in the Koreans (0.90±0.11 to 1.05±0.10mm) and Indians (0.95±0.06 to 1.08±0.07mm) was similar. 16,20 Including ours, the values of these studies indicated stenosis free cervical canal.…”

“…4,15,16 In the study by Nepal P. et al on Nepalese population the VBW was smaller (14.57±1.24 to 15.41±1.75mm) than the present study with larger values (17.81±1.73mm) reported by Singh et al on the same population than ours. [10][11][12] The morphometry of cervical pedicle is used in transpedicular screw fixation and to determine the size of the screw to be used during surgical treatment. Our measurements of PH and PW revealed a tendency which was comparable to the Chinese (5.7± 0.4 to 7.2± 0.7 mm and 4.4± 1.0 to 5.8± 0.6 mm, respectively) and Brazilian (6.8±0.86 to 7.3±0.83 and 5.1±0.78 to 6.8±0.97 mm, respectively) study but larger than the Indian (6.15±0.9 to 6.75±1.09 and 4.89±0.88 to 6.19±1.01mm, respectively) report.…”

“…The methods used to measure the dimensions of vertebrae in this study are similar to what has been used by various authors in different studies. 12,13 For the measurement of uncinate process at C7, processes of both the sides had to be intact so as to achieve consistency while comparing the measurement of parallel sides in the same vertebra. Similarly, for measuring the Torg's ratio at C7, the diameter of anteroposterior vertebral body and vertebral…”

“…4 Though large number of studies on cervical morphology is available in the literature, it has been noted that there are only a few articles dedicated to the study in the Nepalese population. [10][11][12] Furthermore, the range of study of these articles regarding determining its morphology is limited. Therefore, the present study was carried to determine the morphology of dry sub axial cervical vertebra of the regional population.…”

Mean Canal-body Ratio among Specimens of Dried Lumbar Vertebrae in the Department of Anatomy of a Medical College: A Descriptive Cross-sectional Study

“…canal-body ratio is taken as an index for calculating the degree of stenosis. 2 The measurement of dimensions of the lumbar canal and body has thus become an important tool for the diagnosis and treatment of spinal stenosis. 3 - 5 …”