scholarly journals Ellipse method for measuring Liaw’s anteversion of the acetabular component after total hip arthroplasty

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Kuei-Lin Yeh ◽  
Tai-Yin Wu ◽  
Hsuan-Hsiao Ma ◽  
Sheng-Mou Hou ◽  
Chen-Kun Liaw
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Accurate Method ◽  
T Test ◽  
Accuracy Evaluation ◽  
Precise Position ◽  
Total Hip ◽  
Ellipse Method ◽  
Interobserver Error ◽  
Paired T Test

Abstract Background Several cup anteversion measurements for post-operative total hip arthroplasty (THA) surgery have been described. We developed the standardized Liaw’s trigonometric method to eliminate the influence of patient position, which is the most accurate method for cup anteversion measurement. We then developed an ellipse method using the Elliversion software and reported an interobserver error reduction in 2013. In this study, we attempted to apply this ellipse method in the clinic and compared its accuracy with the standard trigonometric version. Methods In the present study, we attempted to incorporate the ellipse method with Liaw’s standardized anteversion in the simulated cup position. We measured standardized Liaw’s anteversion for 434 radiographs in the clinic using the ellipse method. Repeated standard deviation (RSD) was calculated for accuracy evaluation. Furthermore, paired t-test was used for comparison with the interobserver and intraobserver errors. Results We found that the standardized Liaw’s anteversion measured using the ellipse method showed lower RSD than the radiographic version. RSD was 0.795 in the standardized Liaw’s anteversion with ellipse method group. The p-values of the paired t-test were all higher than 0.05 when measuring the interobserver and intraobserver errors. It indicated that the ellipse method was a precise and simple tool for cup anteversion measurement. Conclusion We believe that this ellipse measurement can assist surgeons while placing the acetabulum cup into the precise position and enable early diagnosis of acetabulum loosening.

scholarly journals Ellipse method for measuring Liaw’s anteversion of the acetabular component after total hip arthroplasty

2020 ◽  
Author(s):  
Kuei-Lin Yeh ◽  
Tai-Yin Wu ◽  
Hsuan-Hsiao Ma ◽  
Sheng-Mou Hou ◽  
Chen-Kun Liaw
Keyword(s):  
Standard Deviation ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
T Test ◽  
Accuracy Evaluation ◽  
Precise Position ◽  
Total Hip ◽  
Ellipse Method ◽  
Interobserver Error ◽  
Paired T Test

Abstract Background: Several cup anteversion measurements for post-operative total hip arthroplasty (THA) surgery have been described. We developed the standardized Liaw’s trigonometric method to eliminate the influence of patient position, which is the most accurate method for cup anteversion measurement. We then developed an ellipse method using the Elliversion software and reported an interobserver error reduction in 2013. In our study, we attempted to apply this ellipse method in the clinic and compared its accuracy with the standard trigonometric version.Methods: In the present study, we attempted to incorporate the ellipse method with Liaw’s standardized anteversion in the simulated cup position. We measured standardized Liaw’s anteversion for 434 radiographs in the clinic using the ellipse method. The Repeatedly Standard Deviation (RSD) was applied for accuracy evaluation. Furthermore, paired t-test was used for comparison with the interobserver and intraobserver errors. Results: We found that the standardized Liaw’s anteversion measured using the ellipse method showed lower repeated standard deviation than the radiographic version. RSD was 0.795 in the standardized Liaw’s anteversion with ellipse method group. The p-values of the paired t-test were all higher than 0.05 when measuring the interobserver and intraobserver bias. It indicated that the ellipse method was a precise and simple tool for cup anteversion measurement. Conclusion: We believe that this ellipse measurement can assist surgeons while placing the acetabulum cup into the precise position and enable early diagnosis of acetabulum loosening.

Use of Three-dimensional Printing and Patient-matched Implant in Total Hip Arthroplasty – a Case Study

2019 ◽  
Vol 21 (3) ◽  
pp. 207-216 ◽  
Author(s):  
Piotr Sypień ◽  
Paweł Łęgosz ◽  
Paweł Małdyk
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Three Dimensional ◽  
Revision Arthroplasty ◽  
Patient Specific ◽  
Oral Antibiotic ◽  
Precise Position ◽  
Total Hip ◽  
Custom Made ◽  
History Of

We present a case report of a 70-year-old female patient with a history of right hip dysplasia and total hip arthroplasty complicated by chronic periprosthetic hipction. Failure of oral antibiotic treatment was an indication for implant removal. A computed tomography scan performed during qualification for reimplantation revealed massive bone defects in the pelvis. A three-dimensional printed patient-specific anatomical model of the pelvis helped to determine the precise position and cup size in preoperative planning and prepare a patient-matched acetabulum. The custom-made endoprosthesis was implanted during revision arthroplasty.

scholarly journals The Impact of Global Spinal Alignment on Standing Spinopelvic Alignment Change After Total Hip Arthroplasty

2021 ◽  
pp. 219256822110266
Author(s):  
Deeptee Jain ◽  
Jonathan M. Vigdorchik ◽  
Edem Abotsi ◽  
Dennis Vasquez Montes ◽  
Edward M. Delsole ◽  
...  
Keyword(s):  
Cohort Study ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
T Test ◽  
Spinal Alignment ◽  
Total Hip ◽  
Spinopelvic Alignment ◽  
The Impact

Study Design: Retrospective cohort study. Objectives: The interactions between hip osteoarthritis (OA) and spinal malalignment are poorly understood. The purpose of this study was to assess the influence of total hip arthroplasty (THA) on standing spinopelvic alignment. Methods: In this retrospective cohort study, patients undergoing THA for OA with pre-and postoperative full-body radiographs were included. Standing spinopelvic parameters were measured. Contralateral hip was graded on the Kellgren-Lawrence scale. Pre-and postoperative alignment parameters were compared by paired t-test. The severity of preoperative thoracolumbar deformity was measured using TPA. Linear regression was performed to assess the impact of preoperative TPA and changes in spinal alignment. Patients were separated into low and high TPA (<20 or >/=20 deg) and change in parameters were compared between groups by t-test. Similarly, the influence of K-L grade, age, and PI were also tested. Results: 95 patients were included (mean age 58.6 yrs, BMI 28.7 kg/m2, 48.2% F). Follow-up radiographs were performed at mean 220 days. Overall, the following significant changes were found from pre-to postoperative: SPT (14.2 vs. 16.1, P = 0.021), CL (−8.9 vs. −5.3, P = .001), TS-CL (18.2 vs. 20.5, P = .037) and SVA (42.6 vs. 32.1, P = .004). Preoperative TPA was significantly associated with the change in PI-LL, SVA, and TPA. High TPA patients significantly decreased SVA more than low TPA patients. There was no significant impact of contralateral hip OA, PI, or age on change in alignment parameters. Conclusion: Spinopelvic alignment changes after THA, evident by a reduction in SVA. Preoperative spinal sagittal deformity impacts this change. Level of evidence: III.

MR Imaging with Metal Artifact Reduction to Differentiate between Patients with and without Infected Total Hip Arthroplasty

2018 ◽  
Author(s):  
Benedikt Schwaiger ◽  
Alexandra Gersing ◽  
Daniela Muenzel ◽  
Julia Dangelmaier ◽  
Peter Prodinger ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Mr Imaging ◽  
Hip Arthroplasty ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Total Hip

Plasma Prekallikrein Activity in Patients with Total Hip Arthroplasty

1987 ◽  
Vol 58 (04) ◽  
pp. 1040-1042
Author(s):  
J J M L Hoffmann ◽  
J H J P M Kortmann
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Hip Prosthesis ◽  
Contact System ◽  
Factor Xii ◽  
Total Hip ◽  
Activity Factor ◽  
Patient Groups ◽  
Kallikrein Activity

SummaryThe behaviour of the contact system was studied in 40 patients with total hip arthroplasty, by measuring plasma prekallikrein, spontaneous kallikrein activity and factor XII. In the literature it had been shown that patients with complications from this operation had decreased prekallikrein and increased kallikrein activity (M. Nakahara. Acta orthop scand 1982; 53: 591-6). In the present study, comprising patients with and without pain and proven loosening of the hip prosthesis, these findings could only partially be confirmed. Patients with a loosened prosthesis had significantly lower prekallikrein (mean 0.78 ± 0.28 U/ml; p <0.01) than patients without problems, but no detectable kallikrein activity in plasma. Patients with pain but no loosening had normal prekallikrein (1.04 ±0 0.26 U/ml) and also no demonstrable kallikrein activity. Factor XII was normal in all patient groups. It is concluded that decreased prekallikrein is limited to patients with a loosened hip prosthesis, with or without pain.

A Comparative Analysis of Patient Satisfaction following Total Knee Arthroplasty and Total Hip Arthroplasty Using the Forgotten Joint Score

2020 ◽  
Vol 04 (02) ◽  
pp. 084-089
Author(s):  
Vivek Singh ◽  
Stephen Zak ◽  
Ran Schwarzkopf ◽  
Roy Davidovitch
Keyword(s):  
Total Knee Arthroplasty ◽  
Patient Satisfaction ◽  
Total Hip Arthroplasty ◽  
Knee Arthroplasty ◽  
Hip Arthroplasty ◽  
Demographic Data ◽  
Demographic Differences ◽  
Total Hip ◽  
Forgotten Joint Score ◽  
Total Knee

AbstractMeasuring patient satisfaction and surgical outcomes following total joint arthroplasty remains controversial with most tools failing to account for both surgeon and patient satisfaction in regard to outcomes. The purpose of this study was to use “The Forgotten Joint Score” questionnaire to assess clinical outcomes comparing patients who underwent a total hip arthroplasty (THA) with those who underwent a total knee arthroplasty (TKA). We conducted a retrospective review of patients who underwent primary THA or TKA between September 2016 and September 2019 and responded to the Forgotten Joint Score-12 (FJS-12) questionnaire at least at one of three time periods (3, 12, and 21 months), postoperatively. An electronic patient rehabilitation application was used to administer the questionnaire. Collected variables included demographic data (age, gender, race, body mass index [BMI], and smoking status), length of stay (LOS), and FJS-12 scores. t-test and chi-square were used to determine significance. Linear regression was used to account for demographic differences. A p-value of less than 0.05 was considered statistically significant. Of the 2,359 patients included in this study, 1,469 underwent a THA and 890 underwent a TKA. Demographic differences were observed between the two groups with the TKA group being older, with higher BMI, higher American Society of Anesthesiologists scores, and longer LOS. Accounting for the differences in demographic data, THA patients consistently had higher scores at 3 months (53.72 vs. 24.96; p < 0.001), 12 months (66.00 vs. 43.57; p < 0.001), and 21 months (73.45 vs. 47.22; p < 0.001). FJS-12 scores for patients that underwent THA were significantly higher in comparison to TKA patients at 3, 12, and 21 months postoperatively. Increasing patient age led to a marginal increase in FJS-12 score in both cohorts. With higher FJS-12 scores, patients who underwent THA may experience a more positive evolution with their surgery postoperatively than those who had TKA.

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