Abstract:
BACKGROUND:Conventional intraoperative determination of lower limb alignment is essential for orthopedic surgical treatment. Current methods include the cable, alignment rod, and axis board methods. QUESTION/PURPOSES:Are there differences in accuracy and reliability? What are the individual differences in applicability and radiation exposure? METHODS:Twenty legs from 12 fresh-frozen cadavers were randomly selected. After fixation of the legs, measurements were performed using the cable, alignment rod, and axis board methods. Afterwards, all cadavers were subjected to CT scanning. Intersection of the mechanical leg axis with the tibia plateau was calculated as the percentage of the tibia plateau, beginning at the medial border (0%) and ending at the lateral border (100%). Results are presented as mean ± standard deviation (SD). RESULTS:Compared with CT measurements, differences of the intersection at the tibia plateau were 3.9 ± 8.5% with the cable method, 3.6 ± 7.6% using the alignment rod, and 3.6 ± 9.6% using the axis board. The difference among all measurements was not statistically significant (p = 0.450). The average intersection of the mechanical axis was 43.95 ± 5.15% using the cable method, 43.93 ± 5.49% using the alignment rod, and 43.77 ± 5.92% using the axis board. CT measurements revealed an average intersection of 42.46 ± 5.22%. There was no statistically significant difference among conventional results (p = 0.976). We demonstrated good intraobserver reliability for all three methods (cable method, ICC = 0.97; alignment rod, ICC = 0.95; and axis board, ICC = 0.96). There were no statistically significant differences regarding radiation time (p = 0.349) or dose area product (p = 0.823). CONCLUSIONS:All described measurements demonstrated valid measurement of lower limb alignment. With minimal effort, all three methods present a practical and uncomplicated way to control the mechanical axis.
journal_name
Skeletal Radioljournal_title
Skeletal radiologyauthors
Hawi N,Liodakis E,Suero EM,Meller R,Citak M,Krettek Cdoi
10.1007/s00256-014-1972-9subject
Has Abstractpub_date
2014-11-01 00:00:00pages
1577-81issue
11eissn
0364-2348issn
1432-2161journal_volume
43pub_type
杂志文章abstract::A 53-year-old woman developed a subchondral insufficiency fracture of the right femoral head after undergoing a liver transplantation. Radiographs obtained at her first visit demonstrated a slight subchondral collapse in the superolateral portion of the femoral head. Magnetic resonance imaging (MRI) disclosed an irreg...
journal_title:Skeletal radiology
pub_type: 杂志文章
doi:10.1007/s00256-009-0706-x
更新日期:2009-09-01 00:00:00
abstract::Radiologic examination of 43 patients revealed 47 lesions of a type which we have termed hemispherical spondylosclerosis (HSS). This term describes and includes the following essential and possible radiologic findings of the disease: 1) Hemispherical (or "dome-" or "helmet-shaped") sclerosis of the vertebra above the ...
journal_title:Skeletal radiology
pub_type: 杂志文章
doi:10.1007/BF00347373
更新日期:1981-01-01 00:00:00
abstract::This study reviews 16 cases of chondroblastoma of the patella which constitute nearly 6% of a large group of chondroblastomas scattered throughout the skeleton. Both radiologic and histologic appearances of chondroblastomas of the patella are indistinguishable from those of chondroblastomas arising in other sites. A r...
journal_title:Skeletal radiology
pub_type: 杂志文章
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journal_title:Skeletal radiology
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journal_title:Skeletal radiology
pub_type: 临床试验,杂志文章
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abstract::A 56-year-old man presented with a painless prepatellar mass of the left knee. MR images demonstrated a large, well-defined mass with heterogeneous intermediate signal intensity on T1- and proton density-weighted images. Mild, heterogeneous enhancement was noted after the intravenous administration of gadolinium. Diag...
journal_title:Skeletal radiology
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journal_title:Skeletal radiology
pub_type: 杂志文章
doi:10.1007/BF00347255
更新日期:1980-01-01 00:00:00
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pub_type: 杂志文章
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journal_title:Skeletal radiology
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journal_title:Skeletal radiology
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journal_title:Skeletal radiology
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journal_title:Skeletal radiology
pub_type: 杂志文章
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journal_title:Skeletal radiology
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doi:10.1007/s00256-008-0531-7
更新日期:2009-01-01 00:00:00
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journal_title:Skeletal radiology
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更新日期:2009-09-01 00:00:00
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更新日期:2007-09-01 00:00:00
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journal_title:Skeletal radiology
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journal_title:Skeletal radiology
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