scholarly journals Imageless Navigation Improves Intraoperative Monitoring of Leg Length Changes during Total Hip Arthroplasty for Legg-Calve-Perthes Disease: Two Case Reports

2018 ◽  
Vol 2018 ◽  
pp. 1-4
Author(s):  
Ritesh R. Shah ◽  
Varsha Gobin ◽  
Jeffrey M. Muir
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Case Reports ◽  
Assistive Technologies ◽  
Perthes Disease ◽  
Computer Assisted ◽  
Leg Length ◽  
Total Hip ◽  
Imageless Navigation ◽  
Length Changes

Legg-Calve-Perthes disease is a rare condition characterized by avascular necrosis and malformation of the femoral head. For many patients, total hip arthroplasty (THA) is the only viable treatment option; however, there are challenges associated with THA in this population, primarily the equalization of leg lengths. Here, we present two cases of Legg-Calve-Perthes disease treated via total hip arthroplasty with the assistance of an imageless, computer-assisted navigation device. In each case, the device provided intraoperative data on leg length in real time, allowing for improved accuracy of component placement. Postoperative leg lengths were confirmed to be equalized in each case using radiographs. These cases are, to our knowledge, the first such cases using imageless navigation during THA and demonstrate the benefits of such assistive technologies in challenging cases such as Legg-Calve-Perthes disease.

Measuring leg length and offset with an imageless navigation system during total hip arthroplasty: is it really accurate?

2009 ◽  
Vol 5 (2) ◽  
pp. 192-197 ◽  
Author(s):  
Tobias Renkawitz ◽  
Tibor Schuster ◽  
Thomas Herold ◽  
Holger Goessmann ◽  
Ernst Sendtner ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Navigation System ◽  
Leg Length ◽  
Total Hip ◽  
Imageless Navigation

scholarly journals Accuracy of Leg Length and Offset Restoration in Femoral Pinless Navigation Compared to Navigation Using a Fixed Pin during Total Hip Arthroplasty

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Markus Weber ◽  
Max Thieme ◽  
Moritz Kaiser ◽  
Florian Völlner ◽  
Michael Worlicek ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Minimally Invasive ◽  
Hip Arthroplasty ◽  
Anterolateral Approach ◽  
Leg Length ◽  
Total Hip ◽  
Imageless Navigation ◽  
Number Of Patients ◽  
Intraoperative Control ◽  
Pinless Navigation

Equalization of biomechanical differences is a major goal in total hip arthroplasty (THA). In the current study we compared the accuracy of restoring leg length and offset using imageless navigation with an osseous fixed pin to a femoral pinless device in 97 minimally invasive THAs through an anterolateral approach in the lateral decubitus position. Leg length and offset differences were evaluated on magnification-corrected radiographs by a blinded observer. A postoperative mean difference of -0.9 mm (95% CI -2.8 mm to 1.1 mm, p = 0.38) between pinless navigation and navigation with a fixed pin was observed for leg length and that of -2.4 mm (95% CI -3.9 mm to -0.9 mm, p = 0.002) was observed for offset, respectively. The number of patients with a residual difference below 5 mm after THA was higher if using a fixed pin than in pinless navigation for both leg length (98.2%, 54/55 to 50.0%, 21/42, p < 0.001) and offset (100.0%, 55/55 to 71.4%, 30/42, p < 0.001). Imageless navigation is a feasible method in intraoperative control of leg length and offset in minimally invasive THA. The use of pins fixed to the bone has a higher precision than pinless devices. This trial is registered with DRKS00000739.

scholarly journals Validity of intraoperative imageless navigation (Naviswiss) for component positioning accuracy in primary total hip arthroplasty: protocol for a prospective observational cohort study in a single-surgeon practice

BMJ Open ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. e037126
Author(s):  
Nalan Ektas ◽  
Corey Scholes ◽  
Alejandro M Ruiz ◽  
John Ireland
Keyword(s):  
Cohort Study ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Navigation System ◽  
Observational Cohort Study ◽  
Prospective Observational Cohort Study ◽  
Leg Length ◽  
Total Hip ◽  
Imageless Navigation ◽  
Observational Cohort

IntroductionOptimal outcomes in total hip arthroplasty (THA) are dependent on appropriate placement of femoral and acetabular components, with technological advances providing a platform for guiding component placement to reduce the risk of malpositioned components during surgery. This study will validate the intraoperative data captured using a handheld imageless THA navigation system against postoperative measurements of acetabular inclination, acetabular version, leg length and femoral offset on CT radiographs.Methods and analysisThis is a prospective observational cohort study conducted within a single-centre, single-surgeon private practice. Data will be collected for 35 consecutive patients (>18 years) undergoing elective THA surgery, from the research registry established at the surgeon’s practice. The primary outcome is the agreement between intraoperative component positioning data captured by the navigation system compared with postoperative measurements using CT. A total of ten CT scans will be reassessed for interobserver and intraobserver reliability. The influence of patient and surgical factors on the accuracy of component position will also be examined with multivariable linear regression.Ethics and disseminationEthics approval for this study was provided through a certified ethics committee (Bellberry HREC approval number 2017-07-499). The results of this study will be disseminated through peer-reviewed journals and conference presentations.Trial RegistrationAustralian and New Zealand Clinical Trials Registry (ANZCTR) Trial ID: ACTRN12620000089932.

Direct Anterior Total Hip Arthroplasty with Fluoroscopy to Mitigate the Risk of Complications in Patients with Legg–Calve–Perthes Disease

2021 ◽  
Author(s):  
Andrew G. Yun ◽  
Marilena Qutami ◽  
Kory B. Dylan Pasko
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
High Risk Patient ◽  
Perthes Disease ◽  
Abduction Angle ◽  
Leg Length ◽  
Leg Lengthening ◽  
Total Hip ◽  
Hip Deformity ◽  
The Mean

AbstractA minority of adult patients with childhood Legg–Calve–Perthes disease (LCPD) will develop secondary arthritis with marked leg length discrepancy (LLD) and multiplanar hip deformity. During total hip arthroplasty (THA), these technical challenges increase the perioperative risks of nerve injury, leg length inequality, and implant malposition. The technique of direct anterior total hip arthroplasty (DA-THA) in combination with fluoroscopic imaging was evaluated to mitigate these risks. We performed a retrospective review of 11 DA-THA procedures performed for patients with LCPD. The mean preoperative LLD for the patient cohort was 17 mm (range, 2–54). The mean postoperative LLD was 6 mm (range, 0–28). Acetabular component orientation was precise and accurate with a mean abduction angle of 44 degrees (range, 42–46) and mean anteversion of 20 degrees (range, 16–24). Clinical outcomes demonstrated a mean hip disability and osteoarthritis outcome score for joint replacement (HOOS, Jr) of 94 points. No patients had leg lengthening more than 26 mm and no nerve palsies were identified. We conclude that DA-THA with fluoroscopic guidance may be a valuable method to improve component placement precision and procedural safety in this potentially high-risk patient group.

scholarly journals Value of 3D Preoperative Planning for Primary Total Hip Arthroplasty Based on Biplanar Weightbearing Radiographs

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Y. Knafo ◽  
F. Houfani ◽  
B. Zaharia ◽  
F. Egrise ◽  
I. Clerc-Urmès ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Preoperative Planning ◽  
Femoral Stem ◽  
Leg Length ◽  
Femoral Offset ◽  
Postoperative Result ◽  
Total Hip ◽  
Planning Software ◽  
Navigated Surgery

Two-dimensional (2D) planning on standard radiographs for total hip arthroplasty may not be sufficiently accurate to predict implant sizing or restore leg length and femoral offset, whereas 3D planning avoids magnification and projection errors. Furthermore, weightbearing measures are not available with computed tomography (CT) and leg length and offset are rarely checked postoperatively using any imaging modality. Navigation can usually achieve a surgical plan precisely, but the choice of that plan remains key, which is best guided by preoperative planning. The study objectives were therefore to (1) evaluate the accuracy of stem/cup size prediction using dedicated 3D planning software based on biplanar radiographic imaging under weightbearing and (2) compare the preplanned leg length and femoral offset with the postoperative result. This single-centre, single-surgeon prospective study consisted of a cohort of 33 patients operated on over 24 months. The routine clinical workflow consisted of preoperative biplanar weightbearing imaging, 3D surgical planning, navigated surgery to execute the plan, and postoperative biplanar imaging to verify the radiological outcomes in 3D weightbearing. 3D planning was performed with the dedicated hipEOS® planning software to determine stem and cup size and position, plus 3D anatomical and functional parameters, in particular variations in leg length and femoral offset. Component size planning accuracy was 94% (31/33) within one size for the femoral stem and 100% (33/33) within one size for the acetabular cup. There were no significant differences between planned versus implanted femoral stem size or planned versus measured changes in leg length or offset. Cup size did differ significantly, tending towards implanting one size larger when there was a difference. Biplanar radiographs plus hipEOS planning software showed good reliability for predicting implant size, leg length, and femoral offset and postoperatively provided a check on the navigated surgery. Compared to previous studies, the predictive results were better than 2D planning on conventional radiography and equal to 3D planning on CT images, with lower radiation dose, and in the weightbearing position.

scholarly journals Staged reconstruction of unilateral neglected hip dislocation through total hip arthroplasty and subsequent intramedullary femoral lengthening

2021 ◽  
Author(s):  
Bjoern Vogt ◽  
Christoph Theil ◽  
Georg Gosheger ◽  
Adrien Frommer ◽  
Burkhard Moellenbeck ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Plate Fixation ◽  
Hip Dislocation ◽  
Leg Length ◽  
Total Hip ◽  
Femoral Lengthening ◽  
Shortening Osteotomy ◽  
Successful Approach ◽  
Staged Reconstruction

Abstract Background and purpose Total hip arthroplasty (THA) is a successful approach to treat unilateral symptomatic neglected hip dislocation (NHD). However, the extensive leg length discrepancy (LLD) can hereby only be partially corrected. In case of residual LLD of more than 2 cm, subsequent femoral lengthening can be considered. Patients/material/methods Retrospective analysis of clinical data and radiographs of five patients (age 38.1 (28–51) years) with unilateral NHD who underwent THA with (n  = 3) or without (n = 2) subtrochanteric shortening osteotomy (SSO) and secondary intramedullary femoral lengthening through a retrograde magnetically-driven lengthening nail (follow-up 18.4 (15–27) months). Results LLD was 51.0 (45–60) mm before and 37.0 (30–45) mm after THA. Delayed bone union at one SSO site healed after revision with autologous bone grafting and plate fixation. Subsequent lengthening led to leg length equalisation in all patients. Complete consolidation was documented in all lengthened segments. Conclusion Staged reconstruction via THA and secondary femoral lengthening can successfully be used to reconstruct the hip joint and equalise LLD. The specific anatomical conditions have to be taken into consideration when planning treatment, and patients ought to be closely monitored.

scholarly journals Long-term clinical and radiological outcome in patients with severe Legg-Calvé-Perthes disease after Chiari pelvic osteotomy: a mean of 14 years follow-up

2021 ◽  
pp. 112070002098815
Author(s):  
Dammerer Dietmar ◽  
Braito Matthias ◽  
Peter Ferlic ◽  
Kaufmann Gerhard ◽  
Juana Kosiol ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Joint ◽  
Hip Arthroplasty ◽  
Pelvic Osteotomy ◽  
Perthes Disease ◽  
Total Hip ◽  
Joint Incongruence ◽  
Chiari Pelvic Osteotomy

Introduction: The Chiari pelvic osteotomy (CPO) has been recommended as a salvage procedure to improve head coverage in case of hip joint incongruence in paediatric hip disease. In this study, we aimed to assess the long-term results of CPO for severe Legg-Calvé-Perthes disease (LCPD). Methods: A total of 39 patients who underwent a CPO at our department between 1995 and 2010 were prospectively followed both radiologically (Stulberg classification) and clinically (Harris Hip Score [HHS], conversion into total hip arthroplasty). In this study, we retrospectively reviewed the cases of 12 hips (12 patients, 3 girls, 8 left hips) treated by CPO for severe LCPD (Catterall grade 3 or 4) with hip joint incongruence. Mean follow-up was 14.0 (range 7.6–21.3) years. Results: Mean age at surgery was 10.2 (range 8.2–17.8) years. Additional femoral osteotomy was performed in 8 patients. A good radiological result (Stulberg I or II) was achieved in 2 patients, a fair result (Stulberg III) in 4 patients, and a poor outcome (Stulberg IV or V) in 6 patients. Mean postoperative HHS averaged 93 (range 65–100) points. An excellent functional outcome (HHS 90–100 points) was achieved in 9 patients. No patient underwent total hip arthroplasty during follow-up. Postoperative limb-length discrepancy was found in 3 patients. Conclusions: CPO for severe LCPD with hip joint incongruence resulted in good long-term clinical outcome in about ⅔ of our patients after a mean of 14 years. Our results suggest that CPO can still be considered as a salvage joint-conserving procedure in this selected group of younger patients.

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