Accuracy of acetabular cup insertion in an anterolateral supine approach using an accelerometer-based portable navigation system

Hasegawa, Masahiro; Naito, Yohei; Tone, Shine; Wakabayashi, Hiroki; Sudo, Akihiro

doi:10.1007/s10047-020-01206-8

Cited by 20 publications

(26 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In imageless large-console navigation, the abduction errors were reported to range from 2.9° to 3.2°, and the anteversion errors ranged from 3.7° to 6.5°. The values of deviation for cup abduction and anteversion in the new version group and previous version group were similar or slightly larger than the values reported by Hasegawa et al [ 23 ]. Cup abduction was measured based on registration of RT angle and gravity with Previous HipAlign.…”

Section: Discussionsupporting

confidence: 82%

“…In our previous study, HipAlign added 10 min per procedure compared to the conventional technique; however, it does not add as much time as alternative technologies [ 24 ]. Recently, several studies reported the variation between the actual and desired cup position, and/or the difference between the navigation recorded and actual cup position [ 20 , 22 , 23 ]. Hasegawa et al compared six studies of HipAlign for the absolute values of errors and reported HipAlign of the supine position seemed to be better for cup anteversion accuracy [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

“…Recently, several studies reported the variation between the actual and desired cup position, and/or the difference between the navigation recorded and actual cup position [ 20 , 22 , 23 ]. Hasegawa et al compared six studies of HipAlign for the absolute values of errors and reported HipAlign of the supine position seemed to be better for cup anteversion accuracy [ 23 ]. When HipAlign is used in the supine position, the functional pelvic plane is used for coronal registration, and the plane is set by sensing the direction of gravitational acceleration with a navigation sensor.…”

Section: Discussionmentioning

confidence: 99%

“…The accuracy of cup placement with HipAlign of the supine position and HipAlign of the lateral decubitus position might be different due to the difference in coronal registration. However, only our previous study [ 24 ] was included as the study using HipAlign of the lateral decubitus position in their study [ 23 ]. Surgeons need more data of HipAlign, especially for HipAlign of the lateral decubitus position.…”

Section: Discussionmentioning

confidence: 99%

“…This is likely because a lack of evidence of clinical effect and concerns regarding increased operative time and cost [ 6 , 7 , 18 ]. Recently, a portable, accelerometer-based navigation system for THA (HipAlign; OrthAlign Inc., Aliso Viejo, CA, USA) was introduced, and improved cup positioning have been reported in several studies [ 19 – 23 ]. After our previous study [ 24 ], a new version of a portable, accelerometer-based hip navigation system (New HipAlign) was made available with a change in the method of measuring cup abduction and the addition of a leg length measurement function.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Accuracy of a portable accelerometer-based navigation system for cup placement and intraoperative leg length measurement in total hip arthroplasty: a cross-sectional study

Tanino

Nishida

Mitsutake

et al. 2021

BMC Musculoskelet Disord

View full text Add to dashboard Cite

Background Complications after total hip arthroplasty (THA) are frequently the consequence of malpositioned components or leg length discrepancy after surgery. Recently, a new version of a portable, accelerometer-based hip navigation system (New HipAlign) was made available with a change in the method of measuring cup abduction and the addition of a leg length measurement function. The purposes of this study were to investigate cup positioning and to examine the accuracy of leg length measurement with New HipAlign. Methods Cups were implanted and intraoperative leg length change was measured using New HipAlign in 60 THAs through a posterior approach in the lateral decubitus position. The cup position and radiographic leg length change were determined postoperatively on pelvic radiograph and computed tomography scans. We previously compared cup positioning with a previous version of a portable, accelerometer-based hip navigation system (Previous HipAlign) and conventional surgical techniques. Cup positioning in this study was compared with the results of out previous study using Previous HipAlign. Results The mean cup abduction of 40.3° ± 4.9° (range, 26° to 53°) and the mean cup anteversion of 15.8° ± 5.6° (range, 6.7° to 29.5°) were found. The deviation of the postoperative measured angles from the target cup position was 3.7° ± 3.3° for cup abduction and 5.9° ± 3.6° for cup anteversion. 56/60 of the cups were inside the Lewinnek safe zone. Compared with our previous study using Previous HipAlign, there were no significant differences with regard to cup abduction, cup anteversion, the deviation from the target cup position for cup abduction, the value of deviation for cup anteversion, and the number of cups inside the Lewinnek safe zone (P = 0.218, 0.334, 0.651, 0.797, 0.592). The mean difference between the intraoperative and radiographic leg length changes was + 0.8 ± 3.4 mm. There was significant correlation between the intraoperative and radiographic leg length changes (r = 0.804, P = 0.000). Conclusions Use of New HipAlign allowed for accurate cup placement and reliable leg length measurement during THA. Trial registration Clinical trial is defined as ‘any research study that prospectively assigns human participants or groups of humans to one or more health-related interventions to evaluate the effects on health outcome’ by the World Health Organization (WHO). Because this study is not a clinical trial, trial registration is not needed.

show abstract

Section: Discussionsupporting

confidence: 82%