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Cost analysis and outcomes of simple elbow dislocations

World Journal of Orthopedics 2015年第7期6卷 513-520页

作者： Michalis Panteli Ippokratis Pountos Nikolaos K Kanakaris Theodoros H Tosounidis Peter V Giannoudis Academic Department of Trauma and Orthopaedics School of Medicine University of Leeds Leeds Teaching Hospitals University of Leeds

AIM: To evaluate the management, clinical outcome and cost implications of three different treatment regimes for simple elbow dislocations.METHODS: Following institutional board approval, we performed a retrospective review of all consecutive patients treated for simple elbow dislocations in a Level Ⅰ trauma centre between January 2008 and December 2010. Based on the length of elbow immobilisation(LOI), patients were divided in three groups(Group I, 3 wk). Outcome was considered satisfactory when a patient could achieve a pain-free range of motion ≥ 100°(from 30° to 130°). The associated direct medical costs for the treatment of each patient were then calculated and analysed.RESULTS: We identified 80 patients who met the inclusion criteria. Due to loss to follow up, 13 patients were excluded from further analysis, leaving 67 patients for the final analysis. The mean LOI was 14 d(median 15 d; range 3-43 d) with a mean duration of hospital engagement of 67 d(median 57 d; range 10-351 d). Group Ⅲ(prolonged immobilisation) had a statistically significant worse outcome in comparison to Group Ⅰ?and Ⅱ(P = 0.04 and P = 0.01 respectively); however, there was no significant difference in the outcome between groups Ⅰ?and Ⅱ(P = 0.30). No statistically significantdifference in the direct medical costs between the groups was identified.CONCLUSION: The length of elbow immobilization doesn't influence the medical cost; however immobilisation longer than three weeks is associated with persistent stiffness and a less satisfactory clinical outcome.

关键词： Elbow dislocations Simple Management Outcome Cost analysis

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Ability of bone graft substitutes to support the osteoprogenitor cells: An in-vitro study

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World Journal of Stem Cells 2014年第4期6卷 497-504页

作者： Ziad Dahabreh Michalis Panteli Ippokratis Pountos Mark Howard Peter Campbell Peter V Giannoudis Academic Department of Trauma and Orthopaedics School of MedicineUniversity of LeedsLS1 3EX LeedsUnited Kingdom Smith and Nephew Research Centre YO10 5DF YorkUnited Kingdom Trauma and Orthopaedics Surgery York Teaching HospitalsYO31 8HE YorkUnited Kingdom

AIM: To compare seven commercially available bone graft substitutes(BGS) in terms of these properties and without using any additional biological growth factors.METHODS: Porcine osteoprogenitor cells were loaded on seven commercially available BGS and allowed to proliferate for one week followed by osteogenic induction. Staining for live/dead cells as well as scanning electron microscopy(SEM) was carried out to determine viability and cellular binding. Further outcome measures included alkaline phosphatase(ALP) assays with normalisation for DNA content to quantify osteogenic potential. Negative and positive control experiments were carried out in parallel to validate the results.RESULTS: Live/dead and SEM imaging showed higher viability and attachment with β-tricalcium phosphate(β-TCP) than with other BGS(P < 0.05). The average ALP activity in nmol/mL(normalised value for DNA content in nmol/μg DNA) per sample was 657.58(132.03) for β-TCP, 36.22(unable to normalise) for calcium sulphate, 19.93(11.39) for the Hydroxyapatite/Tricalcium Phosphate composite, 14.79(18.53) for polygraft, 13.98(8.15) for the highly porous β-Tricalcium Phosphate, 5.56(10.0) for polymers, and 3.82(3.8) for Hydroxyapatite.CONCLUSION: Under the above experimental conditions, β-TCP was able to maintain better the viability of osteoprogenitor cells and allow proliferation and differentiation(P < 0.05).

关键词： Bone graft Bone graft substitute Osteoprogenitor cells Fracture healing Bone

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