Is There Any Difference Between a Spherical Marker and a Simple Coin for Hip Replacement Digital Planning?

Autor: Polesello GC; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil., Salerno TT; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil., Queiroz MC; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil., Ricioli Junior W; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil., Rabelo NDA; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil., Honda EK; Departamento de Ortopedia e Traumatologia da Irmandade da Santa Casa de Misericórdia de São Paulo (ISCMSP), São Paulo, SP, Brasil.
Jazyk: angličtina
Zdroj: Revista brasileira de ortopedia [Rev Bras Ortop (Sao Paulo)] 2022 Jan 24; Vol. 57 (4), pp. 560-568. Date of Electronic Publication: 2022 Jan 24 (Print Publication: 2022).
DOI: 10.1055/s-0041-1724079
Abstrakt: Objective  To evaluate the accuracy and differences between 2 types of metallic markers, sphere, and coin, for radiographic calibration in the preoperative planning of hip arthroplasty. Methods  Four spherical metallic markers and four coins, both 25 mm in diameter, were placed on the greater trochanter, pubic symphysis, between the thighs, and on the table of the exam, for radiographic examination of the hip in 33 patients with hip prosthesis. The prosthesis head was used for calibration and two examiners measured the markers' image diameters, and the results were analyzed statistically. Results  In the greater trochanter, the sphere and the coin were not visualized in 19 radiographs (57.6%). Between the thighs, the coin marker was not visualized in 13 radiographs (39.4%). In the greater trochanter, the 25-mm accuracy of the coin and the sphere was, respectively, between 57.1 and 63.3% and between 64.3 and 92.9%. The coin between the thighs reached 25-mm accuracy in between 50 and 60% of cases. Over the exam table, the coin and sphere markers reached, respectively, the mean diameters of 22.91 mm and 23 mm, the lowest coefficient of variation, the lowest confidence interval, and the easiest positioning. There was statistical difference between the evaluations of the markers (coin vs. sphere) in all positions ( p  < 0.032), except for the exam table position ( p  = 0.083). Conclusions  The coin between the thighs is the best marker for radiographic calibration in the preoperative planning of hip arthroplasty, and we suggest the use of another coin on the exam table for comparison, considering the 8% reduction in relation to its real size.
Competing Interests: Conflito de interesses Os autores não têm conflito de interesses para declarar.
(Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ ).)
Databáze: MEDLINE
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