Correction of lag screw guide pins inappropriately placed during intramedullary hip nailing

Jin Park, Si Young Park, Han Kook Yoon, Dae Ya Kim, Hye Yeon Lee, Kyu Hyun Yang

Research output: Contribution to journalArticle

3 Citations (Scopus)


Introduction: Lag screw position is one of the most important controllable factors in trochanteric fracture fixation. However, it is sometimes difficult to handle the lag screw guide pin during intramedullary hip nailing. In this study, causes of guide pin shift and correction of malposition were investigated. Methods: The movements of guide pins during fracture fixation were traced fluoroscopically using 35 embalmed, mainly anteverted femora, angles were measured in the anteroposterior and lateral planes and necessary corrections calculated. Results: In the proximal anteverted femur, posterior correction of an inappropriately placed guide pin in the lateral plane led to an inferior shift in the anteroposterior fluoroscopic view, and vice versa. Mean anteversion, α, β, and β′ angles were 13.1° (5-29°), 10.9° (4-18°), 4.6° (0-10°) and 4.4° (0-9°), respectively. The β′ angle was directly proportional to the anteversion angle only, i.e. Y = 0.27X + 0.65 (R2 = 0.79), p < 0.001. Conclusions: In the proximal anteverted femur, guide pin shift in the anteroposterior fluoroscopic view occurred during correction of pin position in the lateral plane. The amount of shift was directly related to the amount of anteversion.

Original languageEnglish
Pages (from-to)1134-1140
Number of pages7
Issue number10
Publication statusPublished - 2008 Oct 1
Externally publishedYes



  • Anteversion
  • Guide pin
  • Hip fractures
  • Intramedullary hip nailing

ASJC Scopus subject areas

  • Emergency Medicine
  • Orthopedics and Sports Medicine

Cite this