Abstract Objective To provide a theoretical reference for tension band fixation of olecranon fractures by measuring the anatomical parameters of the ulna olecranon. Methods From September 2020 to December 2020,anteroposterior and lateral radiographs of the elbow were obtained for anatomic measurement in the retrospective study,including 30 males and 30 females.The mean age of males was (37.63±13.75)years,and that of females was (39.70±14.60)years.The following parameters were measured:the proximal ulna varus angle,the ulna olecranon width,and the angle between the tangent line of the olecranon fossa and ulna axis.Results The mean value for the proximal ulna varus angle was (10.71±2.77)°in males and (9.97±2.89)°in females,and no significant difference was observed between the two groups (P=0.70).The widths of the ulna olecranon in men(1.90±0.96)mm were significantly larger than those of females (1.61±0.12)mm (P=0.00).The angle between the tangent line of the olecranon fossa and the ulna axis was (25.42±2.31)° in males and (23.12±2.64)° in females,and no significant difference was seen between the two genders (P=0.10).Conclusion Anatomical parameters of the olecranon were measured to provide a reference for the direction,angle and width of the K-wire during tension band operations for olecranon fractures,which will improve the accuracy of such procedures.
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