Jalan Divesh, Elhence Abhay, Yadav Prakrati
Assistant Professor, Department of Orthopaedics, All India Institute of Medical Sciences , Jodhpur, Rajasthan, India .
Associate Professor, Department of Orthopaedics, All India Institute of Medical Sciences , Jodhpur, Rajasthan, India .
J Clin Diagn Res. 2015 Sep;9(9):RC05-8. doi: 10.7860/JCDR/2015/14180.6543. Epub 2015 Sep 1.
The variation of level of distal articulating surface of ulna with respect to distal articulating surface of radius is known as ulnar variance (UV). Positive and negative UV has been implicated in various wrist and hand pathologies.
To measure ulnar variance in a regional subset of Indian population and to compare two techniques of measurement of ulnar variance viz. method of perpendiculars and modification of the concentric circles method.
UV was measured in a regional subset of Indian population comprising of 30 subjects. The mean age of patients was 35.9 years. There were 16 males and 14 females in the study group. Antero-posterior (AP) X-rays of wrist in neutral position were taken and UV was measured using method of perpendiculars and the modified circle method.
The mean UV using method of perpendiculars (UVA) was 0.387 mm and using modified circle method (UVB) was 0.507mm. A higher predominance of positive UV in this regional subset of Indian population was observed. There was no correlation between UV with respect to age and sex. No statistically significant difference was observed between the two methods of measurement utilized in the study.
The documentation of a negative and positive ulnar variance will help in prophylactic and timely intervention for various wrist pathologies, if required. However, a larger sample size with a longer follow up is required to suggest a correlation of ulnar variance with clinically symptomatic disease.
尺骨远端关节面相对于桡骨远端关节面的水平变化被称为尺骨变异（UV）。正尺骨变异和负尺骨变异与多种腕部和手部病变有关。
测量印度人群一个区域亚组的尺骨变异，并比较两种测量尺骨变异的技术，即垂直线法和同心圆法的改良法。
在由30名受试者组成的印度人群区域亚组中测量尺骨变异。患者的平均年龄为35.9岁。研究组中有16名男性和14名女性。拍摄中立位腕部的前后位（AP）X线片，并使用垂直线法和改良圆法测量尺骨变异。
使用垂直线法（UVA）测得的平均尺骨变异为0.387mm，使用改良圆法（UVB）测得的平均尺骨变异为0.507mm。在该印度人群区域亚组中观察到正尺骨变异占比更高。尺骨变异与年龄和性别之间无相关性。在本研究中使用的两种测量方法之间未观察到统计学上的显著差异。
记录负尺骨变异和正尺骨变异将有助于在需要时对各种腕部病变进行预防性和及时干预。然而，需要更大的样本量和更长的随访时间来表明尺骨变异与临床症状性疾病之间的相关性。
