A quantitative assessment of varus thrust in patients with medial knee osteoarthritis

Yuji Kuroyanagi, Takeo Nagura, Yoshimori Kiriyama, Hideo Matsumoto, Toshiro Otani, Yoshiaki Toyama, Yasunori Suda

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Varus thrust is an abnormal lateral knee motion frequently seen in patients with medial knee osteoarthritis (OA) during gait. It is a worsening of the alignment in the stance phase of the gait cycle and closely relates to disease progression. In this study, we measured the thrust quantitatively using skin markers and examined the relationship to other static and dynamic parameters. Forty-four knees in 32 patients (mean age, 72. years; range, 64-81. years) who exhibited the radiographic OA at least grade 2 according to the Kellgren-Lawrence (K-L) scale were enrolled. Gait analysis was performed for each patient to measure the amount of thrust and knee adduction moment. The amounts of thrust in subjects with K-L grades 2 (25 knees), 3 (13 knees), and 4 (6 knees) were 2.4°(± 1.3°), 2.8°(± 1.4°), and 7.2°(± 5.3°), respectively and the knee adduction moments were 3.6(± 1.5) %BW ± Ht, 3.9(± 1.2) %BW ± Ht and 6.9(± 2.2%) BW ± Ht, respectively. The amount of thrust also exhibited significant correlation to static radiographic alignment (R=0.47: 95% confidence interval 0.67-0.21, p=0.0038) and showed greater correlation to the knee adduction moment (R=0.73: 95% confidence interval 0.84-0.55, p< 0.001), which has been identified as an important dynamic index of the disease. The amount of thrust, which is able to be measured by simple inexpensive equipment, correlated to static and dynamic parameters and may offer an important clinical index for knee OA.

Original languageEnglish
Pages (from-to)130-134
Number of pages5
JournalKnee
Volume19
Issue number2
DOIs
Publication statusPublished - 2012 Mar

Fingerprint

Knee Osteoarthritis
Knee
Gait
Confidence Intervals
Osteoarthritis
Disease Progression
Equipment and Supplies
Skin

Keywords

  • Biomechanics
  • Knee
  • Osteoarthritis
  • Quantitative assessment
  • Thrust

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Kuroyanagi, Y., Nagura, T., Kiriyama, Y., Matsumoto, H., Otani, T., Toyama, Y., & Suda, Y. (2012). A quantitative assessment of varus thrust in patients with medial knee osteoarthritis. Knee, 19(2), 130-134. https://doi.org/10.1016/j.knee.2010.12.007

A quantitative assessment of varus thrust in patients with medial knee osteoarthritis. / Kuroyanagi, Yuji; Nagura, Takeo; Kiriyama, Yoshimori; Matsumoto, Hideo; Otani, Toshiro; Toyama, Yoshiaki; Suda, Yasunori.

In: Knee, Vol. 19, No. 2, 03.2012, p. 130-134.

Research output: Contribution to journalArticle

Kuroyanagi, Y, Nagura, T, Kiriyama, Y, Matsumoto, H, Otani, T, Toyama, Y & Suda, Y 2012, 'A quantitative assessment of varus thrust in patients with medial knee osteoarthritis', Knee, vol. 19, no. 2, pp. 130-134. https://doi.org/10.1016/j.knee.2010.12.007
Kuroyanagi, Yuji ; Nagura, Takeo ; Kiriyama, Yoshimori ; Matsumoto, Hideo ; Otani, Toshiro ; Toyama, Yoshiaki ; Suda, Yasunori. / A quantitative assessment of varus thrust in patients with medial knee osteoarthritis. In: Knee. 2012 ; Vol. 19, No. 2. pp. 130-134.
@article{93374a0537054c60a7e6c519fcbcef5c,
title = "A quantitative assessment of varus thrust in patients with medial knee osteoarthritis",
abstract = "Varus thrust is an abnormal lateral knee motion frequently seen in patients with medial knee osteoarthritis (OA) during gait. It is a worsening of the alignment in the stance phase of the gait cycle and closely relates to disease progression. In this study, we measured the thrust quantitatively using skin markers and examined the relationship to other static and dynamic parameters. Forty-four knees in 32 patients (mean age, 72. years; range, 64-81. years) who exhibited the radiographic OA at least grade 2 according to the Kellgren-Lawrence (K-L) scale were enrolled. Gait analysis was performed for each patient to measure the amount of thrust and knee adduction moment. The amounts of thrust in subjects with K-L grades 2 (25 knees), 3 (13 knees), and 4 (6 knees) were 2.4°(± 1.3°), 2.8°(± 1.4°), and 7.2°(± 5.3°), respectively and the knee adduction moments were 3.6(± 1.5) {\%}BW ± Ht, 3.9(± 1.2) {\%}BW ± Ht and 6.9(± 2.2{\%}) BW ± Ht, respectively. The amount of thrust also exhibited significant correlation to static radiographic alignment (R=0.47: 95{\%} confidence interval 0.67-0.21, p=0.0038) and showed greater correlation to the knee adduction moment (R=0.73: 95{\%} confidence interval 0.84-0.55, p< 0.001), which has been identified as an important dynamic index of the disease. The amount of thrust, which is able to be measured by simple inexpensive equipment, correlated to static and dynamic parameters and may offer an important clinical index for knee OA.",
keywords = "Biomechanics, Knee, Osteoarthritis, Quantitative assessment, Thrust",
author = "Yuji Kuroyanagi and Takeo Nagura and Yoshimori Kiriyama and Hideo Matsumoto and Toshiro Otani and Yoshiaki Toyama and Yasunori Suda",
year = "2012",
month = "3",
doi = "10.1016/j.knee.2010.12.007",
language = "English",
volume = "19",
pages = "130--134",
journal = "Knee",
issn = "0968-0160",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - A quantitative assessment of varus thrust in patients with medial knee osteoarthritis

AU - Kuroyanagi, Yuji

AU - Nagura, Takeo

AU - Kiriyama, Yoshimori

AU - Matsumoto, Hideo

AU - Otani, Toshiro

AU - Toyama, Yoshiaki

AU - Suda, Yasunori

PY - 2012/3

Y1 - 2012/3

N2 - Varus thrust is an abnormal lateral knee motion frequently seen in patients with medial knee osteoarthritis (OA) during gait. It is a worsening of the alignment in the stance phase of the gait cycle and closely relates to disease progression. In this study, we measured the thrust quantitatively using skin markers and examined the relationship to other static and dynamic parameters. Forty-four knees in 32 patients (mean age, 72. years; range, 64-81. years) who exhibited the radiographic OA at least grade 2 according to the Kellgren-Lawrence (K-L) scale were enrolled. Gait analysis was performed for each patient to measure the amount of thrust and knee adduction moment. The amounts of thrust in subjects with K-L grades 2 (25 knees), 3 (13 knees), and 4 (6 knees) were 2.4°(± 1.3°), 2.8°(± 1.4°), and 7.2°(± 5.3°), respectively and the knee adduction moments were 3.6(± 1.5) %BW ± Ht, 3.9(± 1.2) %BW ± Ht and 6.9(± 2.2%) BW ± Ht, respectively. The amount of thrust also exhibited significant correlation to static radiographic alignment (R=0.47: 95% confidence interval 0.67-0.21, p=0.0038) and showed greater correlation to the knee adduction moment (R=0.73: 95% confidence interval 0.84-0.55, p< 0.001), which has been identified as an important dynamic index of the disease. The amount of thrust, which is able to be measured by simple inexpensive equipment, correlated to static and dynamic parameters and may offer an important clinical index for knee OA.

AB - Varus thrust is an abnormal lateral knee motion frequently seen in patients with medial knee osteoarthritis (OA) during gait. It is a worsening of the alignment in the stance phase of the gait cycle and closely relates to disease progression. In this study, we measured the thrust quantitatively using skin markers and examined the relationship to other static and dynamic parameters. Forty-four knees in 32 patients (mean age, 72. years; range, 64-81. years) who exhibited the radiographic OA at least grade 2 according to the Kellgren-Lawrence (K-L) scale were enrolled. Gait analysis was performed for each patient to measure the amount of thrust and knee adduction moment. The amounts of thrust in subjects with K-L grades 2 (25 knees), 3 (13 knees), and 4 (6 knees) were 2.4°(± 1.3°), 2.8°(± 1.4°), and 7.2°(± 5.3°), respectively and the knee adduction moments were 3.6(± 1.5) %BW ± Ht, 3.9(± 1.2) %BW ± Ht and 6.9(± 2.2%) BW ± Ht, respectively. The amount of thrust also exhibited significant correlation to static radiographic alignment (R=0.47: 95% confidence interval 0.67-0.21, p=0.0038) and showed greater correlation to the knee adduction moment (R=0.73: 95% confidence interval 0.84-0.55, p< 0.001), which has been identified as an important dynamic index of the disease. The amount of thrust, which is able to be measured by simple inexpensive equipment, correlated to static and dynamic parameters and may offer an important clinical index for knee OA.

KW - Biomechanics

KW - Knee

KW - Osteoarthritis

KW - Quantitative assessment

KW - Thrust

UR - http://www.scopus.com/inward/record.url?scp=84856335957&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856335957&partnerID=8YFLogxK

U2 - 10.1016/j.knee.2010.12.007

DO - 10.1016/j.knee.2010.12.007

M3 - Article

VL - 19

SP - 130

EP - 134

JO - Knee

JF - Knee

SN - 0968-0160

IS - 2

ER -