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Related Concept Videos

Errors in Taping01:18

Errors in Taping

153
Errors in taping arise from multiple factors that can significantly impact measurement accuracy in surveying. Misalignment of the tape, often due to human error, is one primary source. A skilled rear tapeman, using a telescope, can help correct alignment by guiding the head tapeman; however, human limitations still lead to small inaccuracies. These errors may include misplacement of pins or inaccurate tape readings due to common visual confusions, such as mistaking a six for a nine. Such...
153

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Related Experiment Video

Updated: Nov 2, 2025

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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Inter and intra-observer errors for postoperative total hip radiographic assessment using computer aided design.

Adnan Faraj, Mark Andrews, Weiguang Li

    Acta Orthopaedica Belgica
    |June 15, 2021
    PubMed
    Summary

    Radiographic assessment of total hip arthroplasty shows reliable measurements for femoral offset, medial offset, and ilioischial offset between observers. However, accuracy for stem alignment and cup positioning varied, highlighting areas for improved standardization in hip replacement surgery analysis.

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    Area of Science:

    • Orthopaedic Surgery
    • Radiology
    • Medical Imaging Analysis

    Background:

    • Plain radiography is the standard for assessing primary total hip arthroplasty post-surgery.
    • Evaluating the accuracy and concordance of radiographic assessments is crucial for patient outcomes.

    Purpose of the Study:

    • To assess the accuracy and inter-observer concordance of radiographic measurements in primary total hip arthroplasty.
    • To evaluate the reliability of specific hip dimensions and component positioning using computer-aided design (CAD).

    Main Methods:

    • A prospective review of radiographs from ten primary total hip arthroplasty patients (mean age 69) was conducted.
    • Two orthopaedic surgeons assessed early and 6-week postoperative X-rays using CAD for hip and version profiles.
    • Measurements included femoral offset, medial offset, ilioischial offset, stem alignment, cup inclination, and cup version.

    Main Results:

    • Femoral offset, medial offset, and ilioischial offset demonstrated high inter-film and intra-film correlation (ICC > 0.8), indicating substantial reliability.
    • Inter-rater reliability and inter-film correlation showed variability across different measurement dimensions.
    • While some measurements like stem alignment and cup version showed good reliability, cup inclination exhibited inconsistencies.

    Conclusions:

    • Key hip dimensions (femoral offset, medial offset, ilioischial offset) are reliably measured in total hip arthroplasty radiographs.
    • Standardization in assessing parameters like stem alignment and cup positioning may be needed to improve inter-observer consistency.