Comparison of the responsiveness of the SF-36, the Oxford Knee Score, and the Knee Society Clinical Rating System in patients undergoing total knee replacement.

Objectives: To compare the responsiveness of the Knee Society (KS) Clinical Rating System, the general health status measure Short Form 36 (SF-36), and both the raw and Rasch-based scores of the condition-specific Oxford Knee Score (OKS) in patients undergoing total knee replacement (TKR) METHODS: Data were prospectively collected as part of routine care from adult patients who underwent TKR between 2001 and 2006. OKS data fit the Rasch partial credit model after removing items regarding limping and kneeling. Responsiveness was assessed using effect size (ES), standardised response mean (SRM), and relative validity (RV).

Health-related quality of life after total knee replacement or unicompartmental knee arthroplasty in an urban asian population.

Objective: To examine health-related quality of life (HRQoL) after total knee replacement (TKR) or unicompartmental knee arthroplasty (UKA).

Methods: Asian adult patients undergoing either TKR or UKA in a hospital in Singapore between 2001 and 2006 were interviewed before surgery and 6 and 24 months postoperatively to obtain demographic information and HRQoL scores using the Short Form-36 Health Survey (SF-36) and the Oxford Knee Score (OKS).

Results: Data were collected from 2243, 1715, and 1113 patients at baseline and at 6 and 24 months, respectively.

Continuous infiltration of local anaesthetic following total knee arthroplasty.

Purpose: To determine whether continuous infiltration of local anaesthetic can reduce the pain score and morphine use over 48 hours after total knee arthroplasty (TKA).

Methods: 11 men and 43 women aged 50 to 82 years who underwent unilateral TKA for osteoarthritis were recruited. They were randomised into 3 groups.

Effects of periarticular steroid injection on knee function and the inflammatory response following Unicondylar Knee Arthroplasty.

There is little information on the values of CRP and ESR as markers for inflammation in Unicondylar Knee Arthroplasty. The effect of periarticular steroid injection in post-operative pain relief and clinical recovery has not been well studied. Eighty-three consecutive patients undergoing primary UKAs were randomized to receive either an intra-operative periarticular injection with a local anaesthetic and adrenaline or with the addition of triamcinolone acetonide.

Continuous femoral nerve block in total knee arthroplasty: immediate and two-year outcomes.

We conducted a prospective study to investigate the immediate and 2-year outcomes of total knee arthroplasty patients who received continuous femoral nerve block (FNB) for analgesia. Sixty patients undergoing unilateral total knee arthroplasty were randomized into 3 groups and received high-dose continuous FNB, low-dose continuous FNB, or no FNB. In the immediate postoperative period, we studied their pain scores, cumulative morphine use, any FNB-related complications, time of first ambulation, and patient satisfaction.

Validation of Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients scheduled for total knee replacement.

Objective: Our aim was to cross-culturally validate Chinese Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients with knee osteoarthritis (OA) scheduled for total knee replacement in Singapore.

Methods: Chinese WOMAC was translated from the original English version following standard guidelines. Patients were asked to complete a questionnaire containing the WOMAC (twice within 6 days), the Short Form 36 (SF-36), and the EuroQoL EQ-5D.

A study on indirect and intangible costs for patients with knee osteoarthritis in Singapore.

Objectives: To estimate indirect costs through human capital approach and intangible costs through willingness-to-pay (WTP), and identify factors potentially affecting these costs in multiethnic Asian patients with knee osteoarthritis (OA).

Methods: Data were collected through face-to-face interviews among knee OA patients. Human capital approach was used to estimate indirect costs by multiplying: 1) days of absence from work because of OA, with average earnings per capita per day for working patients; or 2) productivity loss with the market price of housekeeping for retirees/homemakers.

Thirty-day mortality and morbidity after total knee arthroplasty.

Introduction: Total knee arthroplasty (TKA) is one of the most successful orthopaedic procedures to date. It is estimated that over 130,000 of TKAs are performed in the United States every year. Whilst the procedure is safe, it nevertheless carries a risk of perioperative mortality and morbidity.

Computer-assisted minimally invasive total knee arthroplasty compared with standard total knee arthroplasty. A prospective, randomized study.

Background: There is little information on the feasibility of computer navigation when using a minimally invasive approach for total knee arthroplasty, during which the anatomic landmarks for registration may be obscured. The purpose of the present study was to determine the radiographic accuracy of this technique and to compare the rate of functional recovery between patients who underwent computer-assisted minimally invasive arthroplasty and those who underwent conventional total knee arthroplasty.

Methods: One hundred and eight consecutive patients were randomized to undergo computer-assisted minimally invasive total knee arthroplasty or conventional total knee arthroplasty.

Randomized controlled trial comparing the radiologic outcomes of conventional and minimally invasive techniques for total knee arthroplasty.

The objective of this study was to compare the radiologic outcomes of total knee arthroplasty using the conventional technique with those using minimally invasive surgery (MIS) techniques. Ninety patients were randomized to undergo conventional (control), MIS mini-incision mid-vastus (mini), or MIS side-cutting (side cut) techniques for their total knee arthroplasty. Long-leg radiographs were assessed postoperatively.

Comparison of the EuroQol and short form 6D in Singapore multiethnic Asian knee osteoarthritis patients scheduled for total knee replacement.

Objective: To compare the EuroQol (EQ-5D) and Short Form 6D (SF-6D) among multiethnic Asian patients with knee osteoarthritis (OA) scheduled for total knee replacement in Singapore.

Methods: Patients were asked to complete questionnaires including the EQ-5D, Short Form 36, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and Lequesne knee index. EQ-5D and SF-6D utility scores were calculated using the scoring algorithms developed from the UK general population.

Direct and indirect costs of osteoarthritis in Singapore: a comparative study among multiethnic Asian patients with osteoarthritis.

Objective: To estimate and compare the direct and indirect costs of osteoarthritis (OA) in multiethnic Asian patients with OA in Singapore.

Methods: The study was a retrospective and cross-sectional design. Patients were stratified according to ethnicity and presence or absence of joint surgery.

Randomized control trial comparing radiographic total knee arthroplasty implant placement using computer navigation versus conventional technique.

The aim of this study is to assess the radiological outcome of conventional techniques versus computer-navigated surgery for total knee arthroplasty. Ninety patients with knee arthritis were prospectively randomized into 3 groups: conventional technique: extramedullary (EM) and intramedullary (IM) tibia guide versus computer navigation surgery (CAS). Two surgeons performed all procedures.

Stress fracture of the medial tibial plateau after minimally invasive unicompartmental knee arthroplasty: a report of 2 cases.

Minimally invasive unicompartmental knee arthroplasty has been increasingly popular for the past few years. Several short- and medium-term published reports have shown it to be as efficacious as open unicompartmental knee arthroplasty, with reduced morbidity. However, complications specifically related to the minimally invasive techniques are not well documented.

Isolated congenital pseudoarthrosis of the fibula.

Congenital pseudarthrosis of the limb most commonly involves the tibia, although various combinations of bones including fibula, radius, ulna, clavicle and humerus have all been described. Isolated congenital pseudarthrosis of the fibula is a very rare entity with only 12 cases reported in the English literature. We report three cases of this condition treated in our institution.