Satisfaction and feasibility of videoconsultation (VC) in orthopaedic and trauma surgery in the context of the COVID-19 pandemic: Prospective study of 783 patients.

BACKGROUND: The COVID-19 pandemic has required that specialists use videoconsultation (VC) to maintain continuity of care. As in-person consultations (IPCs) and surgical procedures were cancelled, VC became the tool of choice. No recent French study has assessed VC as the main consultation modality. The objective of this prospective study was to evaluate: 1) patient satisfaction, 2) access to and the future of VC, 3) and the reasons for VC refusal in the setting of the pandemic. HYPOTHESIS: Patients responded favourably to VC. PATIENTS AND METHOD: We conducted a prospective, single-centre, observational study of consecutive patients who were invited to switch from IPC to VC during the lockdown of March 16 to May 11, 2020, when IPCs were not available. All patients were included in the study, regardless of whether they accepted the VC. The reasons for refusal were recorded at the time of the invitation. The surgeons sent the patients who accepted an emailed satisfaction questionnaire after the VC. RESULTS: Of the 783 patients with scheduled IPCs, 291 (37.2%) accepted a VC instead, 408 (52.1%) refused the VC, and 84 (10.7%) could not be contacted by telephone and were therefore excluded. The VC acceptance rate was 37% (291/783). Of the 291 VC patients, 233 (80.1%) returned the satisfaction questionnaire, although 2 questionnaires had too many missing data to be included, leaving 231 patients for the analysis. The VC was the first consultation with the surgeon for 66 (28.6%) patients. Of the 165 (71.4%) other patients, 51.6% (85/165) were receiving post-operative follow-up. On a 0-5 scale, the global VC experience was scored 4.3±0.8. Of the 231 VC patients, 161 (69.7%) felt that the VC was equivalent to an IPC, 18 (7.8%) that it was poorer, and 7 (3%) that it was better than an IPC; 45 (19.5%) had no opinion on this point. If choosing between a VC or an IPC had been possible during this first lockdown, 168/231 (72.7%) patients would have chosen an IPC. In contrast, 198/231 (85.7%) patients said they would choose an IPC after the lockdown. The group that refused the VC had a significantly older mean age (57.8±16.4 years vs. 48.0±14.4 years, p<0.0001) and lived closer to the institution (p<0.0001), whereas the sex distribution was comparable, with 42.9% of males (175/408) refusing and 46.8% (108/231) accepting the VC (p=0.39). The main reason for refusal was a wish for an in-person encounter with the surgeon (268/408, 65.7%). Patients aged ≥65 years were more likely to refuse due to technical considerations (access to electronic equipment and to the Internet), whereas patients ≤35 years were more likely to wait for an IPC. CONCLUSION: The rate of satisfaction with the VC was high. Satisfaction was not significantly associated with the reason for the consultation (joint involved, degenerative or post-traumatic condition, first VC, first consultation, or follow-up before or after surgery). Although most patients who accepted the VC felt that this modality was equivalent to an IPC, many remained desirous of an in-person encounter with the surgeon, notably among the youngest individuals. Outside the setting of a pandemic, the IPC remains the consultation modality of choice for most of our patients. LEVEL OF EVIDENCE: V, prospective study without a control group.

Excellent outcomes for lateral unicompartmental knee arthroplasty: Multicenter 268-case series at 5 to 23 years' follow-up.

INTRODUCTION: Isolated lateral compartment osteoarthritis of the knee (LCOA) is 10 times less frequent than medial compartment involvement. Long-term assessments of unicompartmental knee arthroplasty (UKA) in this indication are rare, with small series. HYPOTHESIS: Survival and functional outcome of lateral UKA in a large series are quite acceptable; the strategy is suited for isolated LCOA. MATERIAL AND METHOD: A multicenter retrospective study in 6 French health establishments included all lateral UKAs performed between January 1988 and September 2014. Clinical data (range of motion, International Knee Society (IKS) knee and function scores, satisfaction), paraclinical data (radiologic angles) and complications were prospectively entered in medical files during follow-up and analyzed retrospectively at end of follow-up. RESULTS: During the study period, 311 lateral UKAs were performed in 295 patients, using 5 fixed-bearing implant models. Twenty-eight patients died within 5 years, and 15 (4.8%) were lost to follow-up. The series thus comprised 268 lateral UKAs in 63 male and 205 female patients, with a mean age of 68.8±10.5 years, including 7 cases of post-traumatic osteoarthritis and 4 of aseptic osteonecrosis. Mean follow-up was 9.1 years (range, 5-23 years), implant survivorship with failure defined as all-cause revision surgery was 85.4% at 10 years and 79.4% at 20 years. At last follow-up, IKS knee score was 87.0 and IKS function score 80.2. Maximal flexion was 125°. 94.3% of patients were satisfied or very satisfied. The main cause of revision surgery was osteoarthritis in another knee compartment (66,7%, n=26). CONCLUSION: Lateral UKA showed good survivorship, comparable to medial UKA, with good functional results and excellent long-term satisfaction. LEVEL OF EVIDENCE: IV, retrospective cohort study.

Compared outcomes 16 and 25 years after lateral wedge augmentation trochleoplasty: Rate of recurrent dislocation and progression to osteoarthritis.

BACKGROUND: Lateral wedge augmentation trochleoplasty (LWAT) was the earliest described trochleoplasty technique but was gradually replaced by other methods for the treatment of patello-femoral instability with trochlear dysplasia. Data on the outcomes of this procedure in adults are limited. We therefore performed a retrospective study in patients managed by LWAT to assess (1) clinical (recurrent instability and functional scores), (2) and radiological (patello-femoral osteoarthritis) outcomes. HYPOTHESIS: LWAT is associated with a low long-term rate of recurrent patello-femoral dislocation and with no risk of progression to severe patello-femoral osteoarthritis. MATERIAL AND METHODS: Between 1988 and 1995, LWAT was performed on 66 knees in 58 patients to treat patello-femoral instability with trochlear dysplasia. Among them, 17 knees in 13 patients were re-evaluated 16 then 25 years after surgery and were included in the study. At both time points, the following were recorded: stability, pain, the Lille patello-femoral function score, and changes in radiographic and computed tomography findings. In addition to LWAT, Insall's realignment vastus medialis advancement was performed in 4 cases, sartorius muscle transposition in 9 cases, and anterior tibial tubercle osteotomy in 10 cases. RESULTS: No episodes of patello-femoral dislocation were recorded during the 25-year follow-up. The mean Lille patello-femoral function score (0 worst to 100 highest) was 90±15 (range, 48-99) after 16 years and 86±23 (range, 33-94) after 25 years. After 16 years, 8/17 knees had evidence of patello-femoral osteoarthritis, which was Iwano stage 1 in 7 cases and Iwano stage 2 in 1 case. Patello-femoral osteoarthritis was noted in 12 of 13 knees after 25 years but was mild (Iwano stage 1 or 2) in 8 cases. After 25 years, arthroplasty had been performed for 4 of the 17 knees, with 2 cases each of patello-femoral arthroplasty and total knee arthroplasty. CONCLUSION: LWAT is a reliable procedure that provides sustained protection against patello-femoral dislocation and good functional scores when used to treat patello-femoral instability due to trochlear dysplasia. Our results do not support claims that LWAT may be associated with high rates of severe osteoarthritis even after more than 20 years. LEVEL OF EVIDENCE: IV, retrospective observational study with no control group.

Total knee replacement on more than 20° valgus: A case control study.

INTRODUCTION: Lower-limb valgus deformity exceeding 20° is a particular case, with few publications assessing the impact of the severity of the valgus. The present retrospective case control study compared a series of>20° valgus versus a series of 10-20° valgus, assessing (1) operative data [approach, type of total knee replacement (TKR)], (2) complications and implant survival, and (3) clinical and radiological results. HYPOTHESIS: Severe valgus deformity requires TKR with greater constraint, incurring a higher rate of complications and poorer implant survival. MATERIAL AND METHOD: A multicenter retrospective study for the period January 2006 to December 2010 included 53 patients, with a mean age of 72±10 years, presenting>20° valgus. The study series was matched for age and gender with a series of 53 cases of 10-20° valgus. Convexity laxity was greater in the>20° group (p=0.004). RESULTS: There was no significant inter-group difference in approach (p=0.13). Greater constraint was more frequent in the>20° group (7/53 versus 1/53; p=0.03), independently of convexity laxity or Krackow grade (p=0.14). There were 7 complications (13.2%) in the>20° group and 7 in the 10-20° group (NS). Eight-year survivorship was 95.12% in the>20° group and 94.9% in the 10-20° group (p=0.63). There were no significant differences in Oxford score (p=0.30) or HKA angle (p=0.78) at last follow-up. CONCLUSION: The study hypothesis was partially confirmed: greater constraint was more frequent in>20° valgus. The number of complications was low, and survival was identical to that of a control group with less severe deformity. LEVEL OF EVIDENCE: III, retrospectivecase controlstudy.

Surgical technique in patellofemoral arthroplasty.

Patellofemoral arthroplasty (PFA) has seen its role validated over the last decade as a treatment for severe Iwano III or IV patellofemoral osteoarthritis (PFOA). The ideal indication is PFOA with femoral trochlear dysplasia. The accumulation of data on factors influencing the likelihood of PFA failure or success when using first- or second-generation implants has led to design changes, which have been incorporated into modern third-generation implants. These implants are positioned using anatomic cuts, with instrumentation kits that ensure accurate and reproducible alignment. Their design corrects the femoral trochlear dysplasia. Refinements in the indications of PFA, together with advances in prosthetic kinematics and improved understanding of the surgical technique, have strengthened the role for PFA. Although either a lateral or a medial approach can be used, the lateral approach deserves preference. Proper orientation of the femoral and patellar implants is crucial and can be achieved in an accurate and reproducible manner. Orientation of the coronal femoral cut is the only modifiable variable. The cut should be performed with the knee in neutral rotation to minimise both the tibial tuberosity-trochlear groove distance and the amount of extensor apparatus valgus. In the coronal plane, the femoral component must be positioned in valgus, to align the distal part of the trochlear implant with the lateral condylar cartilage. Medial positioning of the patellar component finalises the match between the femur and the patella. This coronal alignment of the two components promotes patellar engagement at the beginning of knee flexion. Thus, the technique brings the trochlea towards the patella and the patella towards the trochlea, thereby ensuring optimal patellofemoral tracking and ensuring a good final outcome. When these requirements are met, the functional and radiographic outcomes are predictable, of good quality, and sustained over time, provided the patient remains free of tibio-femoral osteoarthritis.

Under-corrected knees do not fail more than aligned knees at 8 years in fixed severe valgus total knee replacement.

PURPOSES: A fixed severe valgus knee is a surgical challenge. A safe post-operative Hip-Knee-Ankle angle (HKA) range of 180° ± 4 was recommended, but recent studies mentioned equal results from outliers of this range. Nevertheless, no distinction was made between varus and valgus knees, as well as over-corrected or under-corrected knees. Did post-operative nonaligned total knee replacements (TKR) from fixed severe valgus knees behave differently from the properly aligned population? Did over-corrected knees behave differently from under-corrected knees? METHODS: Through a multi-center retrospective cohort study, we provided 557 knees of at least 10° of minimal pre-operative valgus; in this population 75 presented a post-operative Hip-Knee-Ankle angle (HKA) outside of the 180° ± 4 range; 23 of them had at least 5° of varus; 52 of them had at least 5° of valgus. Median pre-operative HKA of the entire cohort was 194° (range 190-198). Median follow-up was 8 years (range 5-11); Knee Society Score (KSS) results, HKA, Femoral and Tibial Mechanical Angles (FMA, TMA) and complication rates were obtained. The outlier group (HKA ≤ 175 or ≥ 185) was compared to the control group (HKA 180 ± 4); over-corrected (HKA ≤ 175) and under-corrected (HKA ≥ 185) sub-groups were individually tested against the control group. RESULTS: The outlier group had a lower Final Knee Score than the aligned group (p = 0.023). In the over-corrected sub-group, median post-operative FMA was 88° (SD 4°) and median TMA was 87° (SD 4°). The complication rate was higher (p = 0.019). Knee (p = 0.018), Function (p = 0.034) and Final Knee Scores (p = 0.03) were statistically lower than in the control group. In the under-corrected sub-group, mean post-operative FMA was 93° (SD 2°) and mean TMA was 91° (SD 2°). The complication rate was lower (p = 0.019) and there was no difference with the control group concerning KSS. CONCLUSIONS: In case of pre-operative fixed severe valgus knee, one should avoid over-correcting HKA angle and especially the TMA. Over-correction of a severe preoperative valgus in a post-operative varus was prejudicial for TKA survival. Keeping a severe valgus knee in low valgus to avoid using a more constrained implant and/or ligament releases will not decrease the 5-10 year implant survival and functional scores. LEVEL OF EVIDENCE: Level IV-Case series.

Dengue spatial and temporal patterns, French Guiana, 2001.

To study a 2001 dengue fever outbreak in Iracoubo, French Guiana, we recorded the location of all patients' homes and the date when symptoms were first observed. A geographic information system (GIS) was used to integrate the patient-related information. The Knox test, a classic space-time analysis technique, was used to detect spatiotemporal clustering. Analysis of the relative-risk (RR) variations when space and time distances vary, highlighted the maximum space and time extent of a dengue transmission focus. The results show that heterogeneity in the RR variations in space and time corresponds to known entomologic and epidemiologic factors, such as the mosquito feeding cycle and host-seeking behavior. This finding demonstrates the relevance and potential of the use of GIS and spatial statistics for elaborating a dengue fever surveillance strategy.