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Aim: To quantify the number of patients declined surgery due to scoring below the financial threshold, when presenting for total hip or total knee arthroplasty at two New Zealand District Health Boards (DHBs)., Method: Data from patients presenting with hip or knee osteoarthritis at both Whangarei Base Hospital and Hawke's Bay Regional Hospital from June 2012 to June 2013 were reviewed. Data were taken from hospital codes and patient records. The outcome from clinic visits were recorded as well as the patient's New Zealand Orthopaedic Association (NZOA) prioritisation score., Results: A total of 1202 patient records were reviewed: 393 from Whangarei Base Hospital and 809 from Hawke's Bay Regional Hospital. Of the 858 patients where surgery was both desired by the patient and deemed appropriate by the surgeon, 307 (36%) were declined for being below the financial threshold. These patients had a mean NZOA score of 66.42. At Whangarei Base Hospital, 300 patients were referred for surgery and 98 (33%) were declined for being below threshold. The mean NZOA score was significantly higher in the patients booked for surgery (M=70.62) compared with those declined below threshold (M=55.39, p<0.001). Of the 497 patients referred for arthroplasty at Hawke's Bay Regional Hospital, 205 (41%) were declined for being below threshold. The mean NZOA prioritisation scores were also significantly higher in the patients booked for surgery (M=76.96) compared to those declined (M=64.66; p less than or equal to 0.001)., Conclusion: 36% of patients who were suitable for hip or knee arthroplasty were declined elective surgery for being below threshold. Many of these patients have significant pain and disability.

Background: In 2010, Waitemata District Health Board piloted a new model of care for total hip and knee arthroplasties. The pilot was incentive based and clinically led. The participating surgeons and anaesthetists were responsible for increasing surgical throughput. The pilot aimed to increase productivity, reduce cost and increase quality for patients., Aim: To compare costs and outcomes for elective hip and knee arthroplasties carried out at the pilot site (Waitakere Hospital) compared with the main District Health Board hospital site (North Shore Hospital (NSH))., Methods: A retrospective matched cohort study of hip and knee replacements discharged between 1 July 2010 and 31 March 2011, comparing costs and outcomes at the pilot site compared with the NSH site. Only non-complex procedures were included, and routinely collected data were used., Results: One hundred and seventy-seven hip replacements (77 NSH, 100 pilot) and 158 knee replacements (88 NSH, 70 pilot) were analysed. Total inpatient event costs were 12% and 17% lower for hip and knee replacements, respectively, at the pilot site compared with NSH. Significant reduction in operation length (39% hip, 36% knee) and length of stay (38% hip, 39% knee) were found in the pilot groups compared with NSH., Conclusion: Implementation of an innovative new model in a public hospital setting has produced significant increases in productivity and reduced overall costs. This model could potentially be used in other public healthcare settings for non-complex elective surgery., (© 2012 Waitemata District Health Board. Internal Medicine Journal © 2012 Royal Australasian College of Physicians.)

We have examined the outcome of 400 consecutive patients who underwent total knee replacement with the Low Contact Stress mobile-bearing system between 1993 and 1994 and were followed up for a minimum of ten years. All operations were performed by surgeons in Christchurch, New Zealand, who used no other knee prosthesis during the study time. At ten years after operation 238 patients (244 knees) remained for independent clinical and radiological assessment. There was a significant improvement (p < 0.001) in the postoperative knee scores at one, three, seven and ten years, although a slight deterioration in the score occurred between seven and ten years which did not reach statistical significance. The survival for polyethylene wear or loosening was 97% (95% CI 96 to 98) and survival using reoperation for any cause was 92% (95% CI 90 to 94) at 12 years. Polyethylene wear was more common in the meniscal-bearing component, with five knees requiring revision and a further eight demonstrating early wear. Osteolysis was not seen in the rotating platform component, but was present in three of the meniscal-bearing knees. There was no association between the radiological alignment at one year and those knees that subsequently required revision. However, there was an association between the overall limb alignment and the Western Ontario McMasters University score (p < 0.001). The Low Contact Stress mobile-bearing total knee replacement has proved to be a reliable implant at ten years when used in primary knee replacement irrespective of the deformity and diagnosis.