Long-term functional implications of the iatrogenic rotational malalignment of healed diaphyseal femur fractures following intramedullary nailing

Zbigniew Gugala, Yaqdan T. Qaisi, John A. Hipp, Ronald Lindsey

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Abstract

Background: The long-term functional implications for patients with iatrogenic femoral malrotation following femoral intramedullary nail fixation remain unclear. This study examined the extent and direction of rotational alignment of the femur treated with intramedullary nail fixation and its long-term functional effects on patients' standing, walking, and subjective outcome. Methods: Rotational alignment was measured using a CT-based protocol. Foot alignment while standing or walking was determined bilaterally using a pressure mat. Subjective functional outcome was assessed using a questionnaire. Findings: Sixteen patients (5 F, 11 M; age: mean 44.3 years, range 24-75 years) with a healed femur fracture were included. Femur alignment demonstrated internal rotation in five patients (mean 6°; range 2-13°), and external rotation in 11 (mean 18°; range 3-32°). Static foot rotation demonstrated neutral rotation in two patients, internal rotation in four (mean 13°; range 5-22°), and external rotation in 10 (mean 15°; range 5-24°). Dynamic foot rotation demonstrated neutral rotation in two patients, internal rotation in two (mean 11°; range 4-26°), and external rotation in 12 (mean 11°; range 3-22°). There was a trend for increasing dynamic malrotation with femoral rotation (r2 = 0.27; p = 0.055). In half the patients, dynamic foot rotation correlated with the extent of femoral malrotation. There was no association (p = 0.6) between overall patient satisfaction (10 fully satisfied; 5 partially satisfied; and 1 dissatisfied) and foot alignment. Interpretation: Patients can compensate for even significant femoral malrotation and tolerate it well. External femoral malrotation appears to be better compensated/tolerated than internal malrotation.

Original languageEnglish (US)
Pages (from-to)274-277
Number of pages4
JournalClinical Biomechanics
Volume26
Issue number3
DOIs
StatePublished - Mar 2011

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Intramedullary Fracture Fixation
Femur
Thigh
Foot
Nails
Walking
Patient Satisfaction

Keywords

  • Femur fracture
  • Foot orientation
  • Intramedullary nailing

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics

Cite this

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title = "Long-term functional implications of the iatrogenic rotational malalignment of healed diaphyseal femur fractures following intramedullary nailing",
abstract = "Background: The long-term functional implications for patients with iatrogenic femoral malrotation following femoral intramedullary nail fixation remain unclear. This study examined the extent and direction of rotational alignment of the femur treated with intramedullary nail fixation and its long-term functional effects on patients' standing, walking, and subjective outcome. Methods: Rotational alignment was measured using a CT-based protocol. Foot alignment while standing or walking was determined bilaterally using a pressure mat. Subjective functional outcome was assessed using a questionnaire. Findings: Sixteen patients (5 F, 11 M; age: mean 44.3 years, range 24-75 years) with a healed femur fracture were included. Femur alignment demonstrated internal rotation in five patients (mean 6°; range 2-13°), and external rotation in 11 (mean 18°; range 3-32°). Static foot rotation demonstrated neutral rotation in two patients, internal rotation in four (mean 13°; range 5-22°), and external rotation in 10 (mean 15°; range 5-24°). Dynamic foot rotation demonstrated neutral rotation in two patients, internal rotation in two (mean 11°; range 4-26°), and external rotation in 12 (mean 11°; range 3-22°). There was a trend for increasing dynamic malrotation with femoral rotation (r2 = 0.27; p = 0.055). In half the patients, dynamic foot rotation correlated with the extent of femoral malrotation. There was no association (p = 0.6) between overall patient satisfaction (10 fully satisfied; 5 partially satisfied; and 1 dissatisfied) and foot alignment. Interpretation: Patients can compensate for even significant femoral malrotation and tolerate it well. External femoral malrotation appears to be better compensated/tolerated than internal malrotation.",
keywords = "Femur fracture, Foot orientation, Intramedullary nailing",
author = "Zbigniew Gugala and Qaisi, {Yaqdan T.} and Hipp, {John A.} and Ronald Lindsey",
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T1 - Long-term functional implications of the iatrogenic rotational malalignment of healed diaphyseal femur fractures following intramedullary nailing

AU - Gugala, Zbigniew

AU - Qaisi, Yaqdan T.

AU - Hipp, John A.

AU - Lindsey, Ronald

PY - 2011/3

Y1 - 2011/3

N2 - Background: The long-term functional implications for patients with iatrogenic femoral malrotation following femoral intramedullary nail fixation remain unclear. This study examined the extent and direction of rotational alignment of the femur treated with intramedullary nail fixation and its long-term functional effects on patients' standing, walking, and subjective outcome. Methods: Rotational alignment was measured using a CT-based protocol. Foot alignment while standing or walking was determined bilaterally using a pressure mat. Subjective functional outcome was assessed using a questionnaire. Findings: Sixteen patients (5 F, 11 M; age: mean 44.3 years, range 24-75 years) with a healed femur fracture were included. Femur alignment demonstrated internal rotation in five patients (mean 6°; range 2-13°), and external rotation in 11 (mean 18°; range 3-32°). Static foot rotation demonstrated neutral rotation in two patients, internal rotation in four (mean 13°; range 5-22°), and external rotation in 10 (mean 15°; range 5-24°). Dynamic foot rotation demonstrated neutral rotation in two patients, internal rotation in two (mean 11°; range 4-26°), and external rotation in 12 (mean 11°; range 3-22°). There was a trend for increasing dynamic malrotation with femoral rotation (r2 = 0.27; p = 0.055). In half the patients, dynamic foot rotation correlated with the extent of femoral malrotation. There was no association (p = 0.6) between overall patient satisfaction (10 fully satisfied; 5 partially satisfied; and 1 dissatisfied) and foot alignment. Interpretation: Patients can compensate for even significant femoral malrotation and tolerate it well. External femoral malrotation appears to be better compensated/tolerated than internal malrotation.

AB - Background: The long-term functional implications for patients with iatrogenic femoral malrotation following femoral intramedullary nail fixation remain unclear. This study examined the extent and direction of rotational alignment of the femur treated with intramedullary nail fixation and its long-term functional effects on patients' standing, walking, and subjective outcome. Methods: Rotational alignment was measured using a CT-based protocol. Foot alignment while standing or walking was determined bilaterally using a pressure mat. Subjective functional outcome was assessed using a questionnaire. Findings: Sixteen patients (5 F, 11 M; age: mean 44.3 years, range 24-75 years) with a healed femur fracture were included. Femur alignment demonstrated internal rotation in five patients (mean 6°; range 2-13°), and external rotation in 11 (mean 18°; range 3-32°). Static foot rotation demonstrated neutral rotation in two patients, internal rotation in four (mean 13°; range 5-22°), and external rotation in 10 (mean 15°; range 5-24°). Dynamic foot rotation demonstrated neutral rotation in two patients, internal rotation in two (mean 11°; range 4-26°), and external rotation in 12 (mean 11°; range 3-22°). There was a trend for increasing dynamic malrotation with femoral rotation (r2 = 0.27; p = 0.055). In half the patients, dynamic foot rotation correlated with the extent of femoral malrotation. There was no association (p = 0.6) between overall patient satisfaction (10 fully satisfied; 5 partially satisfied; and 1 dissatisfied) and foot alignment. Interpretation: Patients can compensate for even significant femoral malrotation and tolerate it well. External femoral malrotation appears to be better compensated/tolerated than internal malrotation.

KW - Femur fracture

KW - Foot orientation

KW - Intramedullary nailing

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