Reliability of Assessing Patellar Alignment: The A Angle

Ehrat, Michael; Edwards, John Z; Hastings, Donald W.; Worrell, Teddy W.

doi:10.2519/jospt.1994.19.1.22

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…It is used for the evaluation of patellar glide, tilt and rotation, and is measured by a standard goniometer as the angle between a line dividing patella into two and the line drawn from tuberositas tibia to the apex of the inferior patellar pole (Figure 1). 18 In all patients, antero-posterior knee radiographs (knees flexed at 30 degrees), lateral knee radiographs, and tangential radiographs (Merchant view) in supine position with the knees flexed at 45 degrees and the beams directed vertically at 30 degrees from the caudal direction were obtained. 19 Merchant views were used to assess the sulcus angle ( Figure 2).…”

Section: Methodsmentioning

confidence: 99%

The Association Between Patellofemoral Pain Syndrome and Lower Extremity Biomechanics

Kaya¹,

Karagöz²,

Nacır³

et al. 2018

J PMR Sci

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Section: Methodsmentioning

confidence: 99%

The Association Between Patellofemoral Pain Syndrome and Lower Extremity Biomechanics

Kaya¹,

Karagöz²,

Nacır³

et al. 2018

J PMR Sci

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“…Ehrat et al 54 completed a study evaluating the reliability of a patellar alignment measuring technique using three examiners with 2000 clinical experience hours each. Each examiner used a standardized technique to measure the A angle on bilateral knees for 34 subjects in two consecutive trials, unblinded.…”

Section: Other Reliability Studiesmentioning

confidence: 99%

Reliability of position and mobility of the first ray in experienced and inexperienced examiners

Shirk¹

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Reliability of Position and Mobility of the First Ray in Experienced and Inexperienced Examiners. Crystal Shirk, BS, ATC Context: The first ray is an essential part of the gait cycle and manual measurements of the first ray are a common part of a biomechanical examination. Problems with first ray position or mobility may lead to stress fractures, hallux valgus, metatarsalgia, acquired flatfoot, tendonitis, and plantar ulcerations. Although this measurement is quite common, little research has been completed on the reliability of this measurement. Objective: The purpose of this study is to determine intra and interrater reliability for Root's method for measuring first ray position and mobility for experienced and inexperienced examiners. Design: This study is a single-blind prospective reliability study. Setting: The study took place at HealthWorks Rehab & Fitness in Morgantown, WV. Patients and Other Participants: A total of 36 subjects volunteered for this study. A total of four examiners were utilized. Two were inexperienced (I1 & I2), having less than two years of experience working as a certified athletic trainer, and two were experienced (E1 & E2), having more than six years of experience working as a certified athletic trainer or physical therapist. A total of five recorders volunteered to record data for each examiner. Interventions: All subjects signed up for two time periods on two different days. Subjects were assigned a different letter as a code with only the principal investigator aware of the identity of the subject. Prior to data collection, examiners were shown Root's technique for measuring first ray position and mobility and practiced for twenty minutes. Examiners were detained in a room while subjects were positioned by the principal investigator in a supine position on treatment tables. A curtain was pulled around the table to blind the examiner from the subjects. After all subjects were positioned, the four examiners entered the room. The right foot's first ray was examined following Root's technique for position and mobility and the results were reported to the examiner's recorder. The examiner then moved to the right of the subject to evaluate the right foot of the next subject. This process was repeated until all right feet were evaluated. The examiners began again with the first subject they initially assessed and following the same procedures, examined all left feet for first ray position and mobility. Position was assessed as plantarflexed, dorsiflexed, or normal. Mobility was assessed as hypermobile, hypomobile, or normal. After both right and left feet were assessed and results were recorded, examiners retreated back to the holding room. All subjects, examiners, and recorders returned a week later, repeating the same procedures. Main Outcome Measures: The expectations of the study were to determine that experienced examiners would have moderate to high intrarater and interrater reliability for position and mobility while inexperienced examiners would have low to moderate intrarater a...

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Knee

Cleland¹,

Koppenhaver²

2011

Netter's Orthopaedic Clinical Examination

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Reliability of Assessing Patellar Alignment: The A Angle

Cited by 9 publications

References 4 publications

The Association Between Patellofemoral Pain Syndrome and Lower Extremity Biomechanics

The Association Between Patellofemoral Pain Syndrome and Lower Extremity Biomechanics

Reliability of position and mobility of the first ray in experienced and inexperienced examiners

Knee

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