scholarly journals Minimal Increase in Total Hip Arthroplasty Surgical Procedural Time with the Use of a Novel Surgical Navigation Tool

2018 ◽  
Vol 12 (1) ◽  
pp. 389-395 ◽  
Author(s):  
Alexander Christ ◽  
Danielle Ponzio ◽  
Michael Pitta ◽  
Kaitlin Carroll ◽  
Jeffrey M. Muir ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Surgical Navigation ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Total Hip ◽  
Navigation Tool ◽  
Significant Difference ◽  
Procedural Time ◽  
The Impact

Background: Computer-assisted navigation has proven effective at improving the accuracy of component placement during Total Hip Arthroplasty (THA); however, the material costs, line-of-site issues and potential for significant time increases have limited their widespread use. Objective: The purpose of this study was to investigate the impact of an imageless navigation device on surgical time, when compared with standard mechanical guides. Methods: We retrospectively reviewed prospectively collected data from 61 consecutive primary unilateral THA cases (posterior approach) performed by a single surgeon. Procedural time (incision to closure) for THA performed with (intervention) or without (control) a computer-assisted navigation system was compared. In the intervention group, the additional time associated with the use of the device was recorded. Mean times were compared using independent samples t-tests with statistical significance set a priori at p<0.05. Results: There was no statistically significant difference between procedural time in the intervention and control groups (102.3±28.3 mins vs. 99.1±14.7 mins, p=0.60). The installation and use of the navigation device accounted for an average of 2.9 mins (SD: 1.6) per procedure, of which device-related setup performed prior to skin incision accounted for 1.1 mins (SD: 1.1) and intra-operative tasks accounted for 1.6 mins (SD: 1.2). Conclusion: In this series of 61 consecutive THAs performed by a single surgeon, the set-up and hands-on utilization of a novel surgical navigation tool required an additional 2.9 minutes per case. We suggest that the intraoperative benefits of this novel computer-assisted navigation platform outweigh the minimal operative time spent using this technology.

scholarly journals Accuracy of Image-less Navigation for Functional Cup Positioning in Total Hip Arthroplasty

10.29007/3lbz ◽  
2019 ◽  
Author(s):  
Morteza Meftah ◽  
Vinnay Siddappa ◽  
Jeffery Muir ◽  
Peter White
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Weight Bearing ◽  
Safe Zone ◽  
Computer Assisted ◽  
Acetabular Cup ◽  
Assisted Navigation ◽  
Total Hip ◽  
Significant Difference ◽  
Cup Positioning

Computer-assisted navigation has the potential to improve the accuracy of cup positioning during total hip arthroplasty (THA) and prevent leg length discrepancy (LLD). The purpose of this study was to compare acetabular cup position and post- operative LLD after primary THA using posterolateral approach. Between August 2016 to December 2017, 57 THAs using imageless navigation were matched with 57 THA without navigation, based on age, gender and BMI. Post-operative weight-bearing radiographs were assessed using for anteversion, inclination and LLD. Goal for functional cup placement was 40° inclination and 20° anteversion based on preoperative weight bearing pelvic images. Functional LLD was measured as compared to pre- operative radiographs and contralateral side. Proportion of cups within Lewinnek’s safe zone, proximity to a pre-operative target of and the LLD &gt;5 mm was assessed. The mean age was 54.9 ± 9.6 years (30 – 72) and 57.6 ± 12.5 years (20 – 85) in control and navigated groups, respectively. Mean cup orientation in the navigated group was 20.6°± 3.3° (17 - 25) of anteversion and 41.9°± 4.8° (30 - 51) of inclination, vs. 25.0°± 11.1° (10 - 31) and 45.7°± 8.7° (29 – 55) in control group, where were statistically significant (p=0.005 and p=0.0001), respectively. In the navigated group, significantly more acetabular cups were placed within Lewinnek’s safe zone (anteversion: 78% vs. 47%, p=0.005; inclination: 92% vs. 67%, p=0.002). There was no significant difference in mean LLD in navigation and control groups (3.1 ± 1.5 mm vs. 4.6 ± 3.4 mm, p=0.36), although fewer LLDs &gt;5 mm were reported in the navigated group (7.1%) than in controls (31.4%, p=0.007). The use of this image-less computer-assisted navigation improved the accuracy with which acetabular cup components were placed and may represent an important method for limiting post-operative complications related to cup malpositioning and LLD.

scholarly journals Total Hip Arthroplasty Using Imageless Computer-Assisted Navigation—2-Year Follow-Up of a Prospective Randomized Study

2020 ◽  
Vol 9 (6) ◽  
pp. 1620
Author(s):  
Richard Lass ◽  
Boris Olischar ◽  
Bernd Kubista ◽  
Thomas Waldhoer ◽  
Alexander Giurea ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Clinical Outcome ◽  
Hip Arthroplasty ◽  
Important Determinant ◽  
Randomized Study ◽  
Prospective Randomized Study ◽  
Computer Assisted ◽  
Total Hip ◽  
Significant Difference

The purpose of this study is to compare computer-assisted to manual implantation-techniques in total hip arthroplasty (THA) and to find out if the computer-assisted surgery is able to improve the clinical and functional results and reduce the dislocation rate in short-terms after THA. We performed a concise minimum 2-year follow-up of the patient cohort of a prospective randomized study published in 2014 and evaluated if the higher implantation accuracy in the navigated group can be seen as an important determinant of success in total hip arthroplasty. Although a significant difference was found in mean postoperative acetabular component anteversion and in the outliers regarding inclination and anteversion (p < 0.05) between the computer-assisted and the manual-placed group, we could not find significant differences regarding clinical outcome or revision rates at 2-years follow-up. The implantation accuracy in the navigated group can be regarded as an important determinant of success in THA, although no significant differences in clinical outcome could be detected at short-term follow-up. Therefore, further long-term follow-up of our patient group is needed.

Trends in cup position utilizing computer-assisted navigation during total hip arthroplasty

2020 ◽  
Vol 31 (3) ◽  
pp. 211-217
Author(s):  
Rachel R. Mays ◽  
Jessica R. Benson ◽  
Jeffrey M. Muir ◽  
Morteza Meftah
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Total Hip ◽  
Cup Position

scholarly journals The Local Concentration of Ca2+ Correlates with BMP7 Expression and Osseointegration in Patients with Total Hip Arthroplasty

2020 ◽  
Author(s):  
Xiaodong Fu ◽  
Weili Wang ◽  
Xiaomiao Li ◽  
Yingjian Gao ◽  
Hao Li ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Local Concentration ◽  
Mineral Density ◽  
Gruen Zone ◽  
Total Hip ◽  
Significant Difference ◽  
The Impact

Abstract Background A successful osseointegration of total hip arthroplasty (THA) relies on the interplay of implant surface and bone marrow microenvironment. This study was undertaken to investigate the impact of perioperative biochemical molecules (Ca 2+ , Mg 2+ , Zn 2+ , VD, PTH) on the bone marrow osteogenetic factors (BMP2, BMP7, Stro-1 + cells) in the metaphyseal region of the femoral head, and further on the bone mineral density (BMD) of Gruen R3. Methods Bone marrow aspirates were obtained from the discarded metaphysis region of the femoral head in 51 patients with THA. Flow cytometry was used to measure the Stro-1 + expressing cells. ELISA was used to measure the concentrations of bone morphologic proteins (BMP2 and BMP7). The perioperative concentrations of the biochemical molecules above were measured by radioimmunoassay. The BMD of Gruen zone R3 was examined at 6 months after THA, using dual-energy X-ray absorptiometry (DEXA). Results Our data demonstrated that the concentration of Ca 2+ was positively correlated with BMP7 expression, and with the postoperative BMD of Gruen zone R3. However, the concentration of Mg 2+ had little impact on the R3 BMD, although it was negatively correlated with the expression of BMP7. The data also suggested that the other biochemical molecules, such as Zn 2+ , VD, and PTH, were not significantly correlated with any bone marrow osteogenetic factors (BMP2, BMP7, Stro-1 + cells). The postoperative R3 BMD of patients of different gender and age had no significant difference. Conclusions These results indicate the local concentration of Ca 2+ may be an indicator for the prognosis of THA patients.

Evaluation of the impact of preoperative assessment on length of stay after a total hip arthroplasty

2017 ◽  
Vol 80 (6) ◽  
pp. 361-367
Author(s):  
Daniel Harte ◽  
Philip Hamill ◽  
Caroline Williams-Condell ◽  
Stephanie Lewis
Keyword(s):  
Total Hip Arthroplasty ◽  
Length Of Stay ◽  
Hip Arthroplasty ◽  
Preoperative Assessment ◽  
Allied Health Professionals ◽  
Clinical Notes ◽  
Total Hip ◽  
Significant Difference ◽  
Care Package ◽  
The Impact

Introduction To investigate if preoperative assessment delivered by occupational therapists, physiotherapists and social workers for people awaiting a total hip arthroplasty decreased the length of stay in hospital postoperatively. Method A retrospective data review was conducted on all patients who had a primary total hip arthroplasty across a 6-month period. A total of 101 patients (mean age 67.16 years) was included in this evaluation. Clinical notes were used to determine which patients attended or did not attend preoperative assessment. Statistical modeling was used to analyse the association of a series of variables and time spent in hospital after a total hip arthroplasty. Results There was no significant difference in the length of stay for patients who attended preoperative assessment ( P < 0.05) while patients who were medically unfit, lived alone and/or required a care package experienced a significantly higher length of stay ( P < 0.05). Conclusion These results do not support the British Orthopaedic Association’s recommendation that preoperative assessment delivered by allied health professionals helps reduce length of stay. However, it identifies variables which could be managed potentially to reduce length of stay. A large multisite clinical trial is required to determine if preoperative assessment reduces length of stay for people undergoing this surgical procedure.

scholarly journals Clinical Validation of Computer-Assisted Navigation in Total Hip Arthroplasty

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Eric Beaumont ◽  
Pierre Beaumont ◽  
Daniel Odermat ◽  
Isabelle Fontaine ◽  
Herbert Jansen ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Navigation System ◽  
Ct Scans ◽  
Computer Assisted ◽  
Clinical Validation ◽  
Clinical Validity ◽  
Assisted Navigation ◽  
Total Hip ◽  
Secondary Objective

A CT-based navigation system is helpful to evaluate the reamer shaft and the impactor position/orientation during unilateral total hip arthroplasty (THA). The main objective of this study is to determine the accuracy of the Navitrack system by measuring the implant's true anteversion and inclination, based on pre- and postoperative CT scans (n=9patients). The secondary objective is to evaluate the clinical validity of measurements based on postop anteroposterior (AP) radiographs for determining the cup orientation. Postop CT-scan reconstructions and postop planar radiographs showed no significant differences in orientation compared to peroperative angles, suggesting a clinical validity of the system. Postoperative AP radiographs normally used in clinic are acceptable to determine the cup orientation, and small angular errors may originate from the patient position on the table.

Evaluating alternate registration planes for imageless, computer-assisted navigation during total hip arthroplasty

2021 ◽  
Author(s):  
Jonathan M. Vigdorchik ◽  
Peter K. Sculco ◽  
Allan E. Inglis ◽  
Ran Schwarzkopf ◽  
Jeffrey M. Muir
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Total Hip

scholarly journals Efficacy of a simple intraoperative stem-anteversion measuring device in total hip arthroplasty

2020 ◽  
Author(s):  
Kentaro Iwakiri ◽  
Yoichi Ohta ◽  
Yohei Ohyama ◽  
Yukihide Minoda ◽  
Akio Kobayashi ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Level Of Evidence ◽  
Measuring Device ◽  
Correction Angle ◽  
Assisted Navigation ◽  
Total Hip ◽  
Flexion Extension

Abstract Background Background: Stem anteversion is important in reducing postoperative complications in total hip arthroplasty (THA). THA utilizing the combined-anteversion theory requires stem anteversion angle (SAA) measurement intraoperatively; however, intraoperative SAA estimation is difficult for surgeons without computer-assisted navigation system. We evaluated the accuracy of the SAA measured intraoperatively using a newly developed device by comparing the three-dimensional measurements using postoperative computed tomography (CT).Materials & Methods In 127 hips in 127 patients who underwent unilateral THA at our hospital, we used our newly developed device that can be easily attached to rasping broach handles for measuring the SAA intraoperatively, which required the addition of the correction angle obtained in the preoperative epicondylar view. Postoperative SAA and its discrepancies from the measured intraoperative SAA with or without adding the correction angle were compared between the groups to evaluate the usefulness of the device.Results The intraoperative SAA measured by the device was 17.93 ± 7.53°. The true SAA measured on postoperative CT was 26.40 ± 9.73°. The discrepancy between the intraoperative SAA and true SAA was 8.94 ± 5.44° (without the correction angle), and 4.93 ± 3.85° (with the correction angle). Accuracy with a discrepancy of <5 degrees was achieved in 77 (60.6%) and <10 degrees was achieved in 113 (89.0%). The accuracy was unaffected by the stem placement angle (varus/valgus, or flexion/extension), or ipsilateral knee osteoarthritis.Conclusion The SAA measuring device, easily attachable to various rasping handles, is useful to measure the intraoperative SAA in a simple, economical, and noninvasive manner during THA.Level of Evidence Therapeutic Level IV.

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