In the United Kingdom's National Joint Registry 2018 Annual Report, the combination of a POLARSTEM hip stem and R3 acetabular component has the lowest revision rate of any total hip arthroplasty (THA) construct combination at 7 years. Although revision rates remain a crucial measure of an implant combination's performance, there is increasingly more attention being given to patient-reported outcome measures (PROMs), which often reflect the endpoints that patients’ themselves consider of paramount importance in choosing to undergo THA. Therefore, the current analysis was undertaken to better understand the PROMs-based performance of this combination. Bespoke implant reports were requested for the POLARSTEM/R3 combination with OXINIUM™ heads and highly cross-linked polyethylene (XLPE) bearing. Reports used data from the National Health Service PROMs programme, which collected the Oxford Hip Score (OHS), EQ-5D and EQ-VAS. Health gain scores, calculated as differences between preoperative and 6-month post-operative scores, were adjusted to account for any differences in patient demographics between comparative groups. The mean OHS adjusted health gain score for the construct combination was 22.8 (95% confidence interval [CI]: 22.4 – 23.1; n = 1799 patients) compared to 21.2 (95% CI: 21.2 – 21.3; n = 111,055). For EQ-5D, the scores were 0.462 (95% CI: 0.451 – 0.473; n = 1685) for the construct and 0.434 (95% CI: 0.433 – 0.436; n = 102,448) for the class average. For EQ-VAS, the construct had adjusted scores of 14.2 (95% CI: 13.4 – 14.9; n = 1605) compared to the class average of 11.4 (95% CI: 11.3 – 11.5; n = 98,610). There were also more patients who rated their satisfaction as ‘excellent’ in the specific construct group. Comparisons were statistically significant in all cases (p < 0.001). In conclusion, in addition to excellent mid-term survivorship, the POLARSTEM/R3 construct combination has demonstrated superior PROMs that may improve patient outcomes.

Surgical site infections (SSIs) are associated with significant consequences in orthopaedic surgery, where their presence can lead to ultimate revision of the implant. Furthermore, infections and impaired wound healing can prolong length of hospital stay following orthopaedic surgery, which can place additional financial burdens on healthcare systems. The current analysis was conducted to determine whether the use of the PICO single-use negative pressure wound therapy (sNPWT) system after orthopaedic surgery reduced the incidence of SSIs and length of hospital stay compared with using conventional dressings. A systematic literature review (SLR) was performed using the PubMed, Embase and Cochrane Library databases. English-language studies comparing PICO sNPWT to conventional dressings published from 2011 to August 2018 with ≥10 patients in each treatment arm were included. Reference lists of included studies were searched for further relevant studies. Meta-analyses were performed using a fixed effect (I² < 50%) or random effects model (I² ≥ 50%). The SLR identified 6,197 studies, of which 5 relevant studies (607 patients) were included. The odds of an SSI were reduced by 57% (odds ratio [OR]: 0.43; 95% confidence interval [CI]: 0.21–0.86; p = 0.02) and there was consistency between studies (I² = 0%). Three studies reported on length of hospital stay. The mean difference between patient groups indicated that PICO sNPWT was associated with a 1-day reduction in hospital stay (mean difference [MD]: −0.99; 95% CI: −1.32 to −0.65; p < 0.00001) and there was again consistency between studies (I² = 0%). These results suggest that the use of PICO sNPWT system after closed surgical incisions can reduce the incidence of SSIs and shorten the duration of hospital stay when used in orthopaedic patient populations.

Anterior cruciate ligament (ACL)-retaining total knee arthroplasty (TKA) has been associated with more physiologic motion patterns, more normal knee kinematics, and higher patient preference than ACL-sacrificing implant designs. However, it remains unclear how many osteoarthritic patients can be expected to have an intact ACL at the time of surgery in order to undergo ACL-retaining TKA. A systematic literature review was performed in November 2018 using the PubMed and EMBASE databases. Papers written in English, with more than 10 adult patients relevant to the research question were included, whereas cadaveric, revision, animal and simulation studies and conference abstracts were excluded. Data on ACL retention during intraoperative assessment or MRI scans were extracted and analysed using proportional meta-analyses. Twenty-six eligible publications (4167 knees) were included: 20 using intraoperative assessment, 4 using MRI, and 2 using both. Intraoperative assessment of the ACL during TKA showed that the ligament was present in 78% (95% confidence interval [CI]: 72–84%) and intact in 55% (95% CI: 45–65%) of the patients examined. MRI scans revealed higher percentages of ACL presence and intactness than intraoperative assessment, with 91% (95% CI: 79–96%) of the ACL being present and 68% (95% CI: 28–92%) intact. Fewer studies reported on MRI results compared to studies reporting on the intraoperative status of the ACL. In conclusion, intraoperative assessment suggests that over half of the osteoarthritic patients have an intact ACL at the time of TKA surgery, some of whom may qualify for bicruciate-retaining arthroplasty.

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