Evaluation of total hip arthroplasty with automated inclination angle measurement

2016 ◽  
Vol 231 ◽  
pp. S35 ◽  
Author(s):  
Seda Sahin ◽  
Emin Akata ◽  
Osman Erogul ◽  
Cengiz Tuncay ◽  
Huseyin Ozkan
Keyword(s):  
Total Hip Arthroplasty ◽  
Inclination Angle ◽  
Hip Arthroplasty ◽  
Angle Measurement ◽  
Total Hip

Validation of a Simple, Laser-Guided System for Prescribing Acetabular Cup Inclination Angle in Total Hip Arthroplasty

2009 ◽  
Author(s):  
Jennifer Peter ◽  
Jovauna M. Currey ◽  
Meir Marmor ◽  
Jenni M. Buckley ◽  
William McGann
Keyword(s):  
Clinical Trials ◽  
Total Hip Arthroplasty ◽  
Inclination Angle ◽  
Hip Arthroplasty ◽  
Navigation Systems ◽  
Acetabular Cup ◽  
Steep Learning Curve ◽  
Total Hip ◽  
Acetabular Orientation ◽  
Accuracy And Repeatability

In total hip arthroplasty (THR) cases, it can be technically challenging to achieve the correct inclination angle for the acetabular component. Commercial intra-operative navigation systems have been successfully used to precisely guide acetabular orientation [1]; however, these systems are costly, time consuming, and have a steep learning curve for new users [2]. In an effort to simplify the procedure, McGann et al. have developed a laser-guided system to address the inclination angle [3]. In preliminary clinical trials, this system has been used successfully, but its accuracy and repeatability have never been quantified.

scholarly journals Pelvic Inclination Angle and Hip Abductor Muscle Strength after Total Hip Arthroplasty

2013 ◽  
Vol 25 (2) ◽  
pp. 215-219 ◽  
Author(s):  
Akiko Kamimura ◽  
Harutoshi Sakakima ◽  
Masashi Miyazaki ◽  
Megumi Sakasegawa ◽  
Kosei Ijiri ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Total Hip Arthroplasty ◽  
Inclination Angle ◽  
Hip Arthroplasty ◽  
Abductor Muscle ◽  
Total Hip ◽  
Pelvic Inclination ◽  
Hip Abductor

Can the use of an inclinometer improve the positioning of the acetabular component in total hip arthroplasty?

2018 ◽  
Vol 100-B (7) ◽  
pp. 862-866 ◽  
Author(s):  
B. Darrith ◽  
J. A. Bell ◽  
C. Culvern ◽  
C. J. Della Valle
Keyword(s):  
Regression Analysis ◽  
Total Hip Arthroplasty ◽  
Acetabular Component ◽  
Inclination Angle ◽  
Hip Arthroplasty ◽  
Interobserver Reliability ◽  
Multivariate Regression Analysis ◽  
Control Group ◽  
Total Hip ◽  
Inclination Angles

Aims Accurate placement of the acetabular component is essential in total hip arthroplasty (THA). The purpose of this study was to determine if the ability to achieve inclination of the acetabular component within the ‘safe-zone’ of 30° to 50° could be improved with the use of an inclinometer. Patients and Methods We reviewed 167 primary THAs performed by a single surgeon over a period of 14 months. Procedures were performed at two institutions: an inpatient hospital, where an inclinometer was used (inclinometer group); and an ambulatory centre, where an inclinometer was not used as it could not be adequately sterilized (control group). We excluded 47 patients with a body mass index (BMI) of > 40 kg/m2, age of > 68 years, or a surgical indication other than osteoarthritis whose treatment could not be undertaken in the ambulatory centre. There were thus 120 patients in the study, 68 in the inclinometer group and 52 in the control group. The inclination angles of the acetabular component were measured from de-identified plain radiographs by two blinded investigators who were not involved in the surgery. The effect of the use of the inclinometer on the inclination angle was determined using multivariate regression analysis. Results The mean inclination angle for the THAs in the inclinometer group was 42.9° (95% confidence interval (CI) 41.7° to 44.0°; range 29.0° to 63.8°) and 46.5° (95% CI 45.2° to 47.7°; range 32.8° to 63.2°) in the control group (p < 0.001). Regression analysis identified a 9.1% difference in inclination due to the use of an inclinometer (p < 0.001), and THAs performed without the inclinometer were three times more likely to result in inclination angles of > 50° (odds ratio (OR) 2.8, p = 0.036). The correlation coefficient for the interobserver reliability of the measurement of the two investigators was 0.95 (95% CI 0.93 to 0.97). Conclusion The use of a simple inclinometer resulted in a significant reduction in the number of outliers compared with a freehand technique. Cite this article: Bone Joint J 2018;100-B:862–6.

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.

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