Accuracy of the Horizontal Calibrator in Correcting Leg Length and Restoring Femoral Offset in Total Hip Arthroplasty

Xing, Changying; Xing, Shuxing; Zhu, Zhenan; Wang, Huisheng; Yu, Zhongshen; Bai, Xuan; Li, Xi

doi:10.3389/fsurg.2022.845364

Cited by 5 publications

(5 citation statements)

References 37 publications

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“…Chen et al designed a simple device with a pin and a spirit level to hold the leg in the same position during measurements. The authors reported a 2.5 mm LLD compared to traditional methods, which showed a 6.2 mm difference [13]. Another study compared three methods leg-to-leg comparison, a spiritlevel device, and a trochanter/joint ratio device.…”

Section: Discussionmentioning

confidence: 99%

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A Novel Approach for Correcting Limb Length Discrepancy in Total Hip Arthroplasty

Kezer,

Kizilay

2024

Cureus

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Introduction: This study aimed to evaluate the accuracy of the suture technique, along with the utilization of a spirit-level device which is an instrument designed to indicate whether a surface is horizontal or vertical, in comparison to the conventional supraacetabular pin method and caliper measurement for correcting leg length discrepancy (LLD) during total hip arthroplasty (THA).Materials and methods: Consecutive patients who underwent unilateral primary THA between January 2021 and March 2023 were included in the study. The exclusion criteria were severe flexion and adduction contracture that could affect the accuracy of measurements, a history of lower extremity surgery, the presence of lower extremity deformity, and the absence of postoperative full-length radiographs. Patients were allocated into two groups based on the technique employed for correcting LLD during THA. Group 1 (n=62) consisted of patients evaluated using the suture technique with a spirit-level device, while group 2 (n=75) comprised patients who underwent the supraacetabular pin method with caliper measurement. The distance between the inter-teardrop line and the tip of the lesser trochanter was measured for both hips to assess LLD.Results: The mean preoperative LLD was similar between groups, which was 11.6 ± 9.1 mm in group 1 and 9.5 ± 9.8 mm in group 2 (p=0.191). Postoperatively, group 1 had a significantly lower LLD compared to group 2 (p<0.001).Conclusion: According to the results obtained from this study, the use of a suture technique in conjunction with a spirit-level device to achieve a consistent leg position is an effective method for correcting LLD during THA.

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Section: Discussionmentioning

confidence: 99%

“…Few studies have previously examined the effectiveness of utilizing spirit-level devices to achieve leg parallelism during leg length measurements in THA [13,14]. Until March 2022, our center employed the conventional supraacetabular pin method and caliper measurement to correct leg length discrepancy based on preoperative radiographs.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Correcting Limb Length Discrepancy in Total Hip Arthroplasty

Kezer,

Kizilay

2024

Cureus

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“…The mean error of the measurements of the spherical marker centers’ angle using this software was less than 0.3° and the maximum error was 0.49°. Since both were less than 1 mm and 1°, respectively, this software can be considered to be as accurate as a “line gauge.” There have been previous reports testing the accuracy of implant-placement angles [ 27 ] and postoperative leg-length differences [ 28 ], but these have mainly been reported in 1.0° and 1.0 mm increments. Therefore, the mean error in this study was 0.3° and 0.3 mm, and such an error of less than 1° and 1 mm is sufficiently accurate.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of ZedView, the Software for Three-Dimensional Measurement and Preoperative Planning: A Basic Study

et al. 2023

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Background and Objectives: In the field of orthopedic surgery, novel techniques of three-dimensional shape modeling using two-dimensional tomographic images are used for bone-shape measurements, preoperative planning in joint-replacement surgery, and postoperative evaluation. ZedView® (three-dimensional measurement instrument and preoperative-planning software) had previously been developed. Our group is also using ZedView® for preoperative planning and postoperative evaluation for more accurate implant placement and osteotomy. This study aimed to evaluate the measurement error in this software in comparison to a three-dimensional measuring instrument (3DMI) using human bones. Materials and Methods: The study was conducted using three bones from cadavers: the pelvic bone, femur, and tibia. Three markers were attached to each bone. Study 1: The bones with markers were fixed on the 3DMI. For each bone, the coordinates of the center point of the markers were measured, and the distances and angles between these three points were calculated and defined as “true values.” Study 2: The posterior surface of the femur was placed face down on the 3DMI, and the distances from the table to the center of each marker were measured and defined as “true values.” In each study, the same bone was imaged using computed tomography, measured with this software, and the measurement error from the corresponding “true values” was calculated. Results: Study 1: The mean diameter of the same marker using the 3DMI was 23.951 ± 0.055 mm. Comparisons between measurements using the 3DMI and this software revealed that the mean error in length was <0.3 mm, and the error in angle was <0.25°. Study 2: In the bones adjusted to the retrocondylar plane with the 3DMI and this software, the average error in the distance from the planes to each marker was 0.43 (0.32–0.58) mm. Conclusion: This surgical planning software could measure the distance and angle between the centers of the markers with high accuracy; therefore, this is very useful for pre- and postoperative evaluation.

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“…Por su parte, Chen y cols. 19 también lograron un aumento del offset femoral con el uso de un calibre intraoperatorio, pero sin significancia estadística con respecto al grupo de control.…”

Section: Análisis Estadísticounclassified

Método simple para minimizar la discrepancia en la longitud de las extremidades y restaurar el offset en la artroplastia total de cadera

López,

Almada,

Iglesias

et al. 2023

Rev. Asoc. Arg. Ort. y Traumatol

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Introducción: Existen más de 20 técnicas diferentes para corregir la discrepancia de miembros inferiores. El método que aquí se evalúa se basa en una clavija fija posicionada en el ala ilíaca asociada a un “calibre” móvil, con otra clavija con la que se marca la referencia en el trocánter mayor. Objetivo: Evaluar la confiabilidad de este dispositivo de medición usado durante la artroplastia total de cadera para restaurar la longitud del miembro inferior y el offset femoral. Materiales y Métodos: Se formaron dos grupos: grupo A con pacientes en quienes no se había usado el dispositivo y grupo B con pacientes en quienes sí se había usado el dispositivo. Se realizaron las mediciones en la radiografía panorámica de pelvis obtenida con el paciente de pie, antes de la cirugía y 3 meses después. Resultados: Se obtuvo una muestra de 80 pacientes (40 por grupo). Se logró corregir la discrepancia de lalongitud de los miembros, pero no se hallaron diferencias estadísticamente significativas en la corrección promedio, entre ambos grupos (p = 0,07). Sin embargo, al analizar la varianza en la corrección de la discrepancia de la longitud de cada grupo se obtuvo una diferencia estadísticamente significativa (p <0,001). Conclusiones: Este dispositivo que permite una medición cuantificable más objetiva no asegura una corrección de la discrepancia de la longitud exacta a 0 mm, pero sí permite trabajar dentro de unrango más confiable y seguro.

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Accuracy of the Horizontal Calibrator in Correcting Leg Length and Restoring Femoral Offset in Total Hip Arthroplasty

Cited by 5 publications

References 37 publications

A Novel Approach for Correcting Limb Length Discrepancy in Total Hip Arthroplasty

A Novel Approach for Correcting Limb Length Discrepancy in Total Hip Arthroplasty

Accuracy of ZedView, the Software for Three-Dimensional Measurement and Preoperative Planning: A Basic Study

Método simple para minimizar la discrepancia en la longitud de las extremidades y restaurar el offset en la artroplastia total de cadera

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