Mid-term survivorship and patient-reported outcomes of robotic-arm assisted partial knee arthroplasty

Aims Limited evidence is available on mid-term outcomes of robotic-arm assisted (RA) partial knee arthroplasty (PKA). Therefore, the purpose of this study was to evaluate mid-term survivorship, modes of failure, and patient-reported outcomes of RA PKA. Methods A retrospective review of patients who underwent RA PKA between June 2007 and August 2016 was performed. Patients received a fixed-bearing medial or lateral unicompartmental knee arthroplasty (UKA), patellofemoral arthroplasty (PFA), or bicompartmental knee arthroplasty (BiKA; PFA plus medial UKA). All patients completed a questionnaire regarding revision surgery, reoperations, and level of satisfaction. Knee Injury and Osteoarthritis Outcome Scores (KOOS) were assessed using the KOOS for Joint Replacement Junior survey. Results Mean follow-up was 4.7 years (2.0 to 10.8). Five-year survivorship of medial UKA (n = 802), lateral UKA (n = 171), and PFA/BiKA (n = 35/10) was 97.8%, 97.7%, and 93.3%, respectively. Component loosening and progression of osteoarthritis (OA) were the most common reasons for revision. Mean KOOS scores after medial UKA, lateral UKA, and PFA/BiKA were 84.3 (SD 15.9), 85.6 (SD 14.3), and 78.2 (SD 14.2), respectively. The vast majority of the patients reported high satisfaction levels after RA PKA. Subgroup analyses suggested tibial component design, body mass index (BMI), and age affects RA PKA outcomes. Five-year survivorship was 98.4% (95% confidence interval (CI) 97.2 to 99.5) for onlay medial UKA (n = 742) and 99.1% (95% CI 97.9 to 100) for onlay medial UKA in patients with a BMI < 30 kg/m2 (n = 479). Conclusion This large single-surgeon study showed high mid-term survivorship, satisfaction levels, and functional outcomes in RA UKA using metal-backed tibial onlay components. In addition, favourable results were reported in RA PFA and BiKA. Cite this article: Bone Joint J 2020;102-B(1):108–116

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Correction to: Robotic‑arm assisted total knee arthroplasty is associated with improved accuracy and patient reported outcomes: a systematic review and meta‑analysis

Knee Surgery Sports Traumatology Arthroscopy ◽

10.1007/s00167-021-06522-x ◽

2021 ◽

Author(s):

Junren Zhang ◽

Wofhatwa Solomon Ndou ◽

Nathan Ng ◽

Paul Gaston ◽

Philip M. Simpson ◽

...

Keyword(s):

Systematic Review ◽

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Patient Reported Outcomes ◽

Meta Analysis ◽

Robotic Arm ◽

Patient Reported ◽

Total Knee ◽

Improved Accuracy

A correction to this paper has been published: https://doi.org/10.1007/s00167-021-06522-x

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What is the impact of patellofemoral joint degeneration and malalignment on patient-reported outcomes after lateral unicompartmental knee arthroplasty?

The Bone & Joint Journal ◽

10.1302/0301-620x.102b6.bjj-2019-1429.r1 ◽

2020 ◽

Vol 102-B (6) ◽

pp. 727-735

Author(s):

Joost A. Burger ◽

Matthew S. Dooley ◽

Laura J. Kleeblad ◽

Hendrik A. Zuiderbaan ◽

Andrew D. Pearle

Keyword(s):

Knee Arthroplasty ◽

Unicompartmental Knee Arthroplasty ◽

Patellofemoral Joint ◽

Patient Reported Outcomes ◽

Degenerative Changes ◽

Fixed Bearing ◽

Lateral Unicompartmental Knee Arthroplasty ◽

Patient Reported ◽

Lateral Uka

Aims It remains controversial whether patellofemoral joint pathology is a contraindication to lateral unicompartmental knee arthroplasty (UKA). This study aimed to evaluate the effect of preoperative radiological degenerative changes and alignment on patient-reported outcome scores (PROMs) after lateral UKA. Secondarily, the influence of lateral UKA on the alignment of the patellofemoral joint was studied. Methods A consecutive series of patients who underwent robotic arm-assisted fixed-bearing lateral UKA with at least two-year follow-up were retrospectively reviewed. Radiological evaluation was conducted to obtain a Kellgren Lawrence (KL) grade, an Altman score, and alignment measurements for each knee. Postoperative PROMs were assessed using the Kujala (Anterior Knee Pain Scale) score, Knee Injury and Osteoarthritis Outcome Score Joint Replacement (KOOS JR), and satisfaction levels. Results A total of 140 knees (130 patients) were identified for analysis. At mean 4.1 years (2.0 to 8.5) follow-up, good to excellent Kujala scores were reported. The presence of mild to moderate preoperative patellofemoral joint osteoarthritis had no impact on these scores (KL grade 0 vs 1 to 3, p = 0.203; grade 0 to 1 vs 2 to 3, p = 0.674). Comparable scores were reported by patients with osteoarthritis (Altman score of ≥ 2) evident on either the medial or lateral patellofemoral joint facet (medial, p = 0.600 and lateral, p = 0.950). Patients with abnormal patellar congruence and tilt angles (≥ 17° and ≥ 14°, respectively) reported good to excellent Kujala scores. Furthermore, lateral UKA resulted in improvements to patellofemoral alignment. Conclusion This is the first study demonstrating that mild to moderate preoperative radiological degenerative changes and malalignment of the patellofemoral joint are not associated with poor patient-reported outcomes at mid-term follow-up after lateral fixed-bearing UKA. Our data suggest that this may be explained by realignment of the patella and thereby redistribution of loads across the patellofemoral joint. Cite this article: Bone Joint J 2020;102-B(6):727–735.

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Impact of Preoperative Opioid Use on Patient-Reported Outcomes after Revision Total Knee Arthroplasty: A Propensity Matched Analysis

The Journal of Knee Surgery ◽

10.1055/s-0041-1729966 ◽

2021 ◽

Author(s):

Eitan Ingall ◽

Christian Klemt ◽

Christopher M. Melnic ◽

Wayne B. Cohen-Levy ◽

Venkatsaiakhil Tirumala ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Propensity Score ◽

Knee Arthroplasty ◽

Patient Reported Outcomes ◽

Opioid Use ◽

Absolute Increase ◽

Patient Reported ◽

Total Knee ◽

Opioid Users ◽

Revision Tka

AbstractThis is a retrospective study. Prior studies have characterized the deleterious effects of narcotic use in patients undergoing primary total knee arthroplasty (TKA). While there is an increasing revision arthroplasty burden, data on the effect of narcotic use in the revision surgery setting remain limited. Our aim was to characterize the effect of active narcotic use at the time of revision TKA on patient-reported outcome measures (PROMs). A total of 330 consecutive patients who underwent revision TKA and completed both pre- and postoperative PROMs was identified. Due to differences in baseline characteristics, 99 opioid users were matched to 198 nonusers using the nearest-neighbor propensity score matching. Pre- and postoperative knee disability and osteoarthritis outcome score physical function (KOOS-PS), patient reported outcomes measurement information system short form (PROMIS SF) physical, PROMIS SF mental, and physical SF 10A scores were evaluated. Opioid use was identified by the medication reconciliation on the day of surgery. Propensity score–matched opioid users had significantly lower preoperative PROMs than the nonuser for KOOS-PS (45.2 vs. 53.8, p < 0.01), PROMIS SF physical (37.2 vs. 42.5, p < 0.01), PROMIS SF mental (44.2 vs. 51.3, p < 0.01), and physical SF 10A (34.1 vs. 36.8, p < 0.01). Postoperatively, opioid-users demonstrated significantly lower scores across all PROMs: KOOS-PS (59.2 vs. 67.2, p < 0.001), PROMIS SF physical (43.2 vs. 52.4, p < 0.001), PROMIS SF mental (47.5 vs. 58.9, p < 0.001), and physical SF 10A (40.5 vs. 49.4, p < 0.001). Propensity score–matched opioid-users demonstrated a significantly smaller absolute increase in scores for PROMIS SF Physical (p = 0.03) and Physical SF 10A (p < 0.01), as well as an increased hospital length of stay (p = 0.04). Patients who are actively taking opioids at the time of revision TKA report significantly lower preoperative and postoperative outcome scores. These patients are more likely to have longer hospital stays. The apparent negative effect on patient reported outcomes after revision TKA provides clinically useful data for surgeons in engaging patients in a preoperative counseling regarding narcotic use prior to revision TKA to optimize outcomes.

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Robotic-arm assisted total knee arthroplasty is associated with improved accuracy and patient reported outcomes: a systematic review and meta-analysis

Knee Surgery Sports Traumatology Arthroscopy ◽

10.1007/s00167-021-06464-4 ◽

2021 ◽

Author(s):

Junren Zhang ◽

Wofhatwa Solomon Ndou ◽

Nathan Ng ◽

Paul Gaston ◽

Philip M. Simpson ◽

...

Keyword(s):

Learning Curve ◽

Functional Outcomes ◽

Patient Reported Outcomes ◽

Meta Analysis ◽

Robotic Arm ◽

Component Position ◽

Positioning Accuracy ◽

Patient Reported ◽

Total Knee ◽

Improved Accuracy

AbstractThis systematic review and meta-analysis were conducted to compare the accuracy of component positioning, alignment and balancing techniques employed, patient-reported outcomes, and complications of robotic-arm assisted total knee arthroplasty (RATKA) with manual TKA (mTKA) and the associated learning curve. Searches of PubMed, Medline and Google Scholar were performed in October 2020 using PRISMA guidelines. Search terms included “robotic”, “knee” and “arthroplasty”. The criteria for inclusion were published clinical research articles reporting the learning curve for RATKA and those comparing the component position accuracy, alignment and balancing techniques, functional outcomes, or complications with mTKA. There were 198 articles identified, following full text screening, 16 studies satisfied the inclusion criteria and reported the learning curve of rTKA (n=5), component positioning accuracy (n=6), alignment and balancing techniques (n=7), functional outcomes (n=7), or complications (n=5). Two studies reported the learning curve using CUSUM analysis to establish an inflexion point for proficiency which ranged from 7 to 11 cases and there was no learning curve for component positioning accuracy. The meta-analysis showed a significantly lower difference between planned component position and implanted component position, and the spread was narrower for RATKA compared with the mTKA group (Femur coronal: mean 1.31, 95% confidence interval (CI) 1.08–1.55, p<0.00001; Tibia coronal: mean 1.56, 95% CI 1.32–1.81, p<0.00001). Three studies reported using different alignment and balancing techniques between mTKA and RATKA, two studies used the same for both group and two studies did not state the methods used in their RATKA groups. RATKA resulted in better Knee Society Score compared to mTKA in the short-to-mid-term follow up (95%CI [− 1.23, − 0.51], p=0.004). There was no difference in arthrofibrosis, superficial and deep infection, wound dehiscence, or overall complication rates. RATKA demonstrated improved accuracy of component positioning and patient-reported outcomes. The learning curve of RATKA for operating time was between 7 and 11 cases. Future well-powered studies on RATKAs should report on the knee alignment and balancing techniques utilised to enable better comparisons on which techniques maximise patient outcomes.Level of evidence III.

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Acceptability of no-test medical abortion provided via telemedicine: analysis of patient-reported outcomes

BMJ Sexual & Reproductive Health ◽

10.1136/bmjsrh-2020-200954 ◽

2021 ◽

pp. bmjsrh-2020-200954

Author(s):

Chelsey Porter Erlank ◽

Jonathan Lord ◽

Kathryn Church

Keyword(s):

Patient Reported Outcomes ◽

Medical Abortion ◽

Patient Reported Outcome Measures ◽

Patient Reported Outcome ◽

Post Procedure ◽

High Satisfaction ◽

First Choice ◽

Patient Reported ◽

At Home

IntroductionThe English government approved both stages of early medical abortion (EMA), using mifepristone and misoprostol under 10 weeks’ gestation, for at-home use on 30 March 2020. MSI Reproductive Choices UK (MSUK), one of the largest providers of abortion services in England, launched a no-test telemedicine EMA pathway on 6 April 2020. The objectives of this study were to report key patient-reported outcome measures and to assess whether our sample was representative of the whole population receiving no-test telemedicine EMA.MethodsA sample of all MSUK’s telemedicine EMA patients between April and August 2020 were invited to opt in to a follow-up call to answer clinical and satisfaction questions. A total of 1243 (13.7% of all telemedicine EMAs) were successfully followed-up, on average within 5 days post-procedure.ResultsPatients reported high confidence in telemedicine EMA and high satisfaction with the convenience, privacy and ease of managing their abortion at home. The sample responding were broadly equivalent to the whole population receiving telemedicine. No patient reported that they were unable to consult privately. The majority (1035, 83%) of patients reported preferring the telemedicine pathway, with 824 (66%) indicating that they would choose telemedicine again if COVID-19 were no longer an issue.ConclusionsTelemedicine EMA is a valued, private, convenient and more accessible option that is highly acceptable for patients seeking an abortion, especially those for whom in-clinic visits are logistically or emotionally challenging. Evidence that this pathway would be a first choice again in future for most patients supports the case to make telemedicine EMA permanent.

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