The Annual Trip to the Ice-rink: A Seasonal Cause of Wrist Trauma in Irish Hospitals.

Fractures of the distal radius are a common orthopaedic presentation in Irish emergency departments. As a nation, Irish people tend to ice-skate seasonally with a peak of interest seen during the Winter months in temporary ice-rinks. This case series describes winter ice-skating as a significant cause of wrist fractures in the younger patient, including five cases of distal radius fractures, four of which ultimately required internal fixation, under general anaesthesia, over a single weekend in the month of December. Despite all five patients being amateur ice-skaters, all denied ever having taken ice-skating lessons. This demonstrates the dangers of wrist trauma in the inexperienced or beginner ice-skaters on temporary ice-rinks; the seasonal morbidity suffered as a result.

Does the femoral offset affect replacements? The results from a National Joint Registry.

BACKGROUND: Femoral component offset influences the torque forces exerted on a femoral stem and may therefore adversely affect femoral component survival. This study investigated the influence of femoral component offset on revision rates for primary total hip replacements (THR) registered on the New Zealand Joint Registry (NZJR). METHODS: There were 106,139 primary THRs registered, resulting in 4960 revisions for any cause. There were 46,242 THRs performed using the five commonest femoral components listed on the NZJR. A total of 41,100 were done for primary osteoarthritis of which 40,548 had all the offset information available for analysis. We defined low offset as < 42 mm, standard as 42-48 mm and high offset as > 48 mm offset and examined revision rates according to the reasons for revision. We performed survival analyses for both cemented and uncemented femoral components grouped by the different offsets. RESULTS: The all-cause revision rate was 0.54/100 component years (cys). Stems with < 42 mm offset had a revision rate of 0.58/100 cys (mean 0.58; 95% confidence interval (CI) 0.53-0.63), 42-48 mm offset 0.47 (95% CI 0.43-0.52) and > 48 mm offset 0.67 (95% CI 0.57-0.79). There was no significant difference in all-cause revision rates between varying stem offsets in uncemented stems adjusting for age and gender. In cemented stems both high and low offset stems were more likely to be revised. Uncemented stems of all offsets were more likely to undergo revision for femoral fracture. CONCLUSIONS: Femoral component offset affects the overall all-cause revision rate of the most commonly used cemented stem, but not uncemented stem designs. In cemented stems offset influences the rate of revision for loosening and periprosthetic fractures.

The value of serial metal ion levels in following up patients with metal-on-metal hip arthroplasty.

BACKGROUND: The sensitivity of cobalt (Co) and chromium (Cr) ion-levels in detecting poorly performing metal-on-metal hip implants is low. This study proposes that serial changes in ion-levels are a more accurate marker of arthroplasties at risk. METHODS: Serial metal ion-levels and implant data of 285 patients with ASR resurfacing or replacement were studied. Patient and implant characteristics were analysed using univariate and multivariate analyses. RESULTS: 111 (39%) had revision surgery. Time since index surgery (p<0.001), acetabular inclination (p<0.001), their interaction (p<0.001) and femoral head size (p = 0.01) were significant variables. Head size (≤51 mm) had lower Co and Cr levels (p = 0.01). Cr/Co showed marginal decrease over time in the unrevised group and no decrease prerevision. CONCLUSIONS: Repeated measurement of ion-levels were higher in the revision group suggesting that serial measurements rather than absolute values may have a role to play in predicting implant failure.

A Case Report of Primary Extranodal Non-hodgkin Lymphoma First Presentation as a Soft Tissue Swelling Around the Wrist.

INTRODUCTION: Primary musculoskeletal extranodal non-Hodgkin lymphoma is a rare presentation and account for 5% of all primary extranodal non-Hodgkin lymphomas. Treatment uses a combination of chemotherapy and radiotherapy with good prognosis in unifocal manifestation. We report an unusual case of primary musculoskeletal extranodal lymphoma presenting as a soft tissue swelling around the wrist. CASE REPORT: A 75 year old lady was referred to the Orthopaedic Outpatients Department with a painless, slowly growing mass on the dorsum of the right wrist. Clinical examination revealed a 6 X 9 cm round painless mass on the dorsum of the distal radius adherent to both the underlying structures and skin. MRI of the wrist showed a large mass causing extensive osteolysis of the distal radius and extending proximally with abnormal replacement of the marrow. The patient was brought to theatre for biopsy and subsequent histopathological examination confirmed a B-cell non-Hodgkin lymphoma. The patient was referred to the Haematology Service for further treatment and follow-up. She received chemotherapy and radiotherapy with satisfactory results. CONCLUSION: Lymphoma presenting as a soft tissue mass is relatively uncommon and can easily be confused with a wide variety of inflammatory conditions, more common neoplasias as well as infectious diseases (tuberculosis). Though rare, extranodal lymphoma should be regularly included in the differential diagnosis of mass lesions.

Intra-articular dislocation of the patella.

We present an unusual case of a chronic, irreducible intra-articular dislocation of the patella in an elderly nursing home resident. The patient had been unable to weight bear for 3 weeks. Radiographs in the emergency department (ED) confirmed the intra-articular dislocation with the superior pole lodged in the intercondylar notch. She underwent two failed closed reduction attempts and subsequently required an open reduction under general anaesthesia.

Accuracy of digital preoperative templating in 100 consecutive uncemented total hip arthroplasties: a single surgeon series.

Digital templating is an accurate method of assessing femoral and acetabular component sizes. This allows surgeons to foresee potential problems and also recognize an intraoperative error when a large discrepancy exists between a trial component and the templated size. Preoperative templating data of pelvic radiographs from 100 consecutive patients receiving uncemented implants were templated with Orthoview software (version 2.0CEN; Meridian Technique Ltd, Southampton, United Kingdom). Seventy-five percent of stems were templated to within 0.5 size, and 98%, to within 1 size. Eighty percent of cups were templated to within 2 mm, and 98%, to within 4 mm, and 62% of head length was accurately template. Seven patients were converted from a templated 132° to a 127° femoral prosthesis neck angle. The mean lower limb length discrepancy was +0.05 mm (SD, 5.1 mm) postoperatively.

A prospective randomised study comparing the jubilee dressing method to a standard adhesive dressing for total hip and knee replacements.

AIM OF THE STUDY: It is important to reduce potential wound complications in total hip and total knee arthroplasty procedures. The purpose of this study was to compare the jubilee dressing method to a standard adhesive dressing. METHOD: 124 patients (62 total hip replacements and 62 total knee replacements) were randomly selected to have either a standard adhesive dressing or jubilee method dressing. The number of dressing changes, incidence of blistering, leakage, appearance of inflammation, infection rate and the average stay in hospital was recorded for each patient. RESULTS: The jubilee dressing significantly reduced the rate of blistering, leakage and number of dressing changes when compare to a traditional adhesive dressing (p < 0.05). The rate of inflammation and average length of stay in hospital was not significantly different between the two groups. CONCLUSION: The authors recommend the use of this dressing for total hip and total knee arthroplasty procedures due to the associated lower complication rate.

Effects of preoperative neuromuscular electrical stimulation on quadriceps strength and functional recovery in total knee arthroplasty. A pilot study.

BACKGROUND: Supervised preoperative muscle strengthening programmes (prehabilitation) can improve recovery after total joint arthroplasty but are considered resource intensive. Neuromuscular electrical stimulation (NMES) has been shown to improve quadriceps femoris muscle (QFM) strength and clinical function in subjects with knee osteoarthritis (OA) however it has not been previously investigated as a prehabilitation modality. METHODS: This pilot study assessed the compliance of a home-based, NMES prehabilitation programme in patients undergoing total knee arthroplasty (TKA). We evaluated its effect on preoperative and postoperative isometric quadriceps femoris muscle (QFM) strength, QFM cross-sectional area (CSA) and clinical function (subjective and objective). Seventeen subjects were recruited with 14 completing the study (NMES group n = 9; Control group n = 5). RESULTS: Overall compliance with the programme was excellent (99%). Preoperative QFM strength increased by 28% (p > 0.05) with associated gains in walk, stair-climb and chair-rise times (p < 0.05). Early postoperative strength loss (approximately 50%) was similar in both groups. Only the NMES group demonstrated significant strength (53.3%, p = 0.011) and functional recovery (p < 0.05) from 6 to 12 weeks post-TKA. QFM CSA decreased by 4% in the NMES group compared to a reduction of 12% in the control group (P > 0.05) at 12 weeks postoperatively compared to baseline. There were only limited associations found between objective and subjective functional outcome instruments. CONCLUSIONS: This pilot study has shown that preoperative NMES may improve recovery of quadriceps muscle strength and expedite a return to normal activities in patients undergoing TKA for OA. Recommendations for appropriate outcome instruments in future studies of prehabilitation in TKA have been provided.