Aims

The preoperative diagnosis of periprosthetic joint infection (PJI) remains a challenge due to a lack of biomarkers that are both sensitive and specific. We investigated the performance characteristics of polymerase chain reaction (PCR), interleukin-6 (IL6), and calprotectin of synovial fluid in the diagnosis of PJI.

Patients with recurrent patella instability, who have an abnormal patellofemoral alignment (patella height or tibial tubercle-trochlear groove (TTTG) distance), benefit from tibial tubercle transfer along with medial patellofemoral ligament (MPFL) reconstruction. Between July 2008 and April 2013, 18 patients (21 knees) with recurrent patellar instability underwent combined MPFL reconstruction and tibial tubercle transfer. All patients had abnormal patellofemoral alignment in addition to MPFL insufficiency. 15 patients (16 knees) with a mean age of 24 years (16–41) had a mean follow up of 26 months (6–55). We assessed the outcome using KOOS, KUJALA, activity level and patient satisfaction scores. All patients had a stable patella. There was a significant improvement in outcome scores in 12 out of 15 patients. At final follow up KOOS score had improved from 68.25(44 to 93.9) to 77.05(48.8 to 96.4) and KUJALA score had improved from 63.3(41–88) to 78.06 (45 to 99). 9 patients showed excellent results and achieved at least a pre-injury level of activity. 4 of these had activity level better then preoperative level. 6 patients had a lower activity level than pre-injury (1 – ongoing physiotherapy, 1 – because of lack of confidence, and 4 – Life style modification). 14 patients were satisfied and happy to recommend this procedure. There were 3 postop complications, with 2 cases of stiffness and 1 case of non-union of the tibial tuberosity. Our prospective study has shown that restoration of tibial tubercle-trochlear groove index, Patella height and Medial Patellofemoral Ligament reconstruction yields good results in carefully selected patients.

The Pipino prosthesis was introduced as an alternative to hip resurfacing because of its bone preserving capability. Preserving the femoral neck to a greater extent saves valuable bonestock for possible revision procedures. The stem (proximal 2/3) and acetabular cup are hydroxyapatite coated. Bearings were all either ceramic or metal on polyethylene. All procedures were performed or directly supervised by the senior author.

Patients in the cohort were assessed pre-operatively, in the short term and the medium term using the Harris Hip Score(HHS). Hip radiographs were performed at medium term follow-up to assess for radiological signs of aseptic loosening.

The study is based on a cohort of 70 patients, 34 male and 36 female with mean age of 52 (range 13-71). Followed up over a mean period of 43 months (range 17-60). 70 patients were contacted and 64 patients were reviewed. Four patients were lost to follow-up. Indications for surgery were Osteoarthritis (56); Rheumatoid arthritis (8); AVN (3); SUFE (2); Perthes (2); DDH (1); Psoriatic Arthropathy (1).

The cohort’s preoperative HHS showed a mean 50.1 (range 25-88). This increased to a mean of 95.9 (range 55-100) in the short term review period, during the medium term review the mean 93.6 (range 63-100). With 82% of patients in the excellent group and 88% good to excellent group.

At the final review there was one case of aseptic loosening (Cup) which required revision surgery. There were 2 dislocations and one intraoperative lateral femoral wall fracture and no cases of superficial or deep infection.

In conclusion we believe that the Pipino collum femo-ris preserving total hip arthroplasty has excellent short and medium term results.

Introduction and aim: In order to harness existing surgical skill and expertise of the operator trained in conventional total hip arthroplasty (THA) it would be advantageous to adopt a mini-incision surgery (MIS) THA technique that is similar. It would also make economic sense for MIS THA to be performed using existing conventional instrumentation available in every elective orthopaedic unit. The aim of this retrospective comparative study was to verify safety, efficacy and durability of this MIS THA technique via a modified anterolateral approach developed in our hospital by the senior author. This technique utilises standard instrumentation and does not require the use of an image intensifier.

Materials and Methods: The implants used in the study were the SL-Plus (Plus Endoprothetik AG, CH-Rotkreuz) and the EPF cup (Plus Endoprothetik AG, CH-Rotkreuz). We report on our experience of a consecutive series of 111 patients operated for osteoarthritis of the hip joint.

Results: Fifty-nine patients (53.2%) were implanted using MIS technique; the remainder (52 cases, 46.8%) were operated using conventional THA via traditional anterolateral approach. In patients undergoing MIS technique a skin incision averaging 8 cm (range 7.5 to 9 cm) was made over the greater trochanter with two thirds lying superior to its tip. The surgical procedure lasted forty minutes on average, and no excessive retraction was needed. The small incision can be extended with ease if access proves difficult, but this proved unnecessary in any of our cases.

The mean follow-up for the MIS THA group was 22.9 months compared to 33.1 months for the conventional THA group. All our MIS patients had less postoperative blood loss, needed less post operative painkillers, and mobilised earlier. There was however no significant difference in the duration of postoperative hospital stay between the two patient groups. We have had no incidence of dislocation and continue to use this technique during routine THA.

Discussion and conclusion: A review of the MIS THA literature is provided to compare this technique with those described by other authors. The authors believe this to be a safe, cost effective alternative to MIS THA techniques that require special instrumentation and the use of the image intensifier.

Aim: To audit blood transfusion practice in primary total hip arthroplasty (THA) and primary total knee arthroplasty (TKA) after introduction of more stringent blood transfusion criteria.

Methods: A retrospective survey was carried out for all THR and TKR. Data was collected over a period of four months with a blood transfusion criteria of haemoglobin (Hb) concentration of 8.0 g/dl and below. This was compared against a three month period after the reduction in the blood transfusion criteria to a Hb concentration of 7.0 g/dl and below. An analysis of all pre-operative and post-operative (day-2 post-op) Hb concentrations was performed. The post-transfusion Hb concentration was recorded 1-day post transfusion.

Results: A total 539 TKA and 521 THA were performed. Following the new blood transfusion protocol the rate of blood transfusion was significantly reduced from 9.4% to 3.6% for TKA, and from 28% to 12.8% for THA.

Conclusion: A significant reduction in transfusion rates is achieved in TKA and THA by introduction of a Hb concentration 7.0 g/dl as a trigger for blood transfusion. This new trigger is based on the current body of evidence available and is integrated in to well defined care pathway. A 50% reduction in donated blood is predicted in the UK in 2007 if vCJD testing is enforced. We feel early redressing of blood transfusion practice in the UK is advised if we are to avoid a catastrophic reduction in our TKA and THA capacity.