Radiographic Measurement of Joint Space Width Using the Fixed Flexion View in 1,102 Knees of Japanese Patients with Osteoarthritis in Comparison with the Standing Extended View

Kan, Hiroyuki; Kobayashi, Masashi; Nakagawa, Shuji; Inoue, Hiroaki; Hino, Manabu; Komaki, Shintaro; Ikoma, Kazuya; Ueshima, Keiichiro; Fujiwara, Hiroyoshi; Kubo, Toshikazu

doi:10.5792/ksrr.16.046

Cited by 18 publications

(15 citation statements)

References 24 publications

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“…In PA projection, the X‐ray beam is directed from behind the patient. When the patient is positioned for a FFV their thigh is in contact with the detector plate, toes are in the same line with the detector, feet are in a 10° external rotation and the X‐ray beam is directed in a 10° caudal angle (Kan et al, ; Niinimäki, Ojala, Niinimäki, & Leppilahti, ).…”

Section: Methodsmentioning

confidence: 99%

The association between knee breadth and body mass: The Northern Finland Birth Cohort 1966 case study

Keisu

Oura

Niskanen

et al. 2019

American J Phys Anthropol

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Objectives: Body mass estimation from skeletal dimensions is a useful tool when studying archeological human samples. Bony articular surface dimensions of the lower limb have frequently been utilized to estimate body size. In the present study, we investigated the association between knee breadth and body mass in a Northern European population. Our study aimed to confirm both methodology and results presented in earlier studies. Materials and methods:The study sample consists of 1,290 subjects belonging to the Northern Finland Birth Cohort 1966. Three knee breadth dimensions-femoral biepicondylar breadth, mediolateral breadth of femoral condyles, and mediolateral breadth of the tibial plateau-were measured from subjects' knee PA-radiographs.Measurements and their association with body weight at 31 years were utilized for creating body mass estimation equations using linear regression and reduced major axis regression. Correlations between knee measurements and body weight at three different ages (18, 31, and 46) were also analyzed.Results: Positive associations were detected between each knee breadth variable and weight in the total sample and both genders separately. Body mass estimation equations were created for the total sample, for males and for females. R values of the models ranged from 0.38 to 0.74. Median absolute percent prediction errors ranged from 6.89 to 9.72%. The highest correlations were obtained between knee breadth and body weight in early adulthood.Discussion: Our large sample confirmed that equations derived from knee breadth dimensions are accurate when estimating body mass of modern humans. Knee breadth measurements clearly have a positive association with body weight in early maturity. K E Y W O R D Santhropology, body mass, body mass estimation, knee breadth

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Section: Methodsmentioning

confidence: 99%

The association between knee breadth and body mass: The Northern Finland Birth Cohort 1966 case study

Keisu

Oura

Niskanen

et al. 2019

American J Phys Anthropol

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“…FFV images were acquired as described. [ 5 , 6 ] Briefly, the patient stood with a 10° external rotation of the feet, with the anterior thigh in close contact with the cassette and the tips of the toes on the same plane as that of the cassette. A posteroanterior image was acquired at an irradiation angle of 10° tilt in the caudal direction (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…3 ). [ 6 ] The disease stage of knee OA was evaluated using K-L classification. [ 7 ] Knees were classified into KL grade I-IV, based on KL grade on each of SEV and FFV at baseline.…”

Section: Methodsmentioning

confidence: 99%

“…[ 1 – 3 ] Therefore, the method by Rosenberg et al [ 2 ] has also been used, in which the image is acquired in a standing knee flexion position. The fixed flexion view (FFV) [ 4 – 6 ] has recently been reported as a new acquisition method, in which images can be simply acquired in a knee flexion position, which is more stable than the position employed in the Rosenberg method, thus, facilitating more accurate evaluation. We acquired images of 1102 knees with OA using the FFV method and demonstrated that this method was useful in evaluating joint space narrowing.…”

Section: Introductionmentioning

confidence: 99%

“…We acquired images of 1102 knees with OA using the FFV method and demonstrated that this method was useful in evaluating joint space narrowing. [ 6 ] While conservative treatment is selected for early-stage knee OA, surgical treatment is selected when the cartilage is worn with progression of OA and when activities of daily living (ADL) are impaired. The treatment method differs depending on the OA stage and disease condition among conservative or surgical treatments.…”

Section: Introductionmentioning

confidence: 99%

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Fixed-flexion view X-ray of the knee superior in detection and follow-up of knee osteoarthritis

et al. 2017

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A fixed flexion view (FFV) is useful for evaluating joint space when assessing the severity of osteoarthritis (OA) of the knee. We analyzed changes in joint space revealed by standing extended view (SEV) and FFV over a mean 4 years, to compare both views on their capacity to measure joint space width accurately at particular time points during follow-up.SEV and FFV images were acquired in patients with knee OA. The 81 patients (157 knees) followed up for ≥24 months were selected as study subjects. Medial joint space widths (MJSW), Kellgren–Lawrence (KL) grades, and reductions in MJSW on SEV (ΔSEV) and FFV (ΔFFV) were compared in knees evaluated by SEV and FFV.At both time-points, mean MJSW was significantly lower by FFV than by SEV. Mean MJSW was significantly lower at follow-up than at first examination by both SEV and FFV. At both time-points, the KL grade was higher by FFV than by SEV group. The ΔFFV was significantly greater than the ΔSEV. ΔSEV did not differ significantly among KL grades, but ΔFFV was significantly greater in patients with KL grade II than in patients with other KL grades.FFV is not only useful for evaluating joint space in knees with OA, but also for accurately evaluating the progression of OA. The risk of rapid progression of knee OA may be higher in patients with KL grade II, as determined by FFV. FFV may be superior to SEV in determining appropriate treatment strategies for knee OA.

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Basics of 2D Planning in Total Knee Replacement

Fink

Abermann

2020

ESSKA Instructional Course Lecture Book

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Radiographic Measurement of Joint Space Width Using the Fixed Flexion View in 1,102 Knees of Japanese Patients with Osteoarthritis in Comparison with the Standing Extended View

Cited by 18 publications

References 24 publications

The association between knee breadth and body mass: The Northern Finland Birth Cohort 1966 case study

The association between knee breadth and body mass: The Northern Finland Birth Cohort 1966 case study

Fixed-flexion view X-ray of the knee superior in detection and follow-up of knee osteoarthritis

Basics of 2D Planning in Total Knee Replacement

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