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  • Title: The use of low-intensity pulsed ultrasound in treating delayed union of fifth metatarsal fractures.
    Author: Teoh KH, Whitham R, Wong JF, Hariharan K.
    Journal: Foot (Edinb); 2018 Jun; 35():52-55. PubMed ID: 29793139.
    Abstract:
    BACKGROUND: There are no studies looking at the success rate of low-intensity pulsed ultrasound (LIPUS) in fifth metatarsal fracture delayed unions to our knowledge. The aim of this study is to investigate the use of LIPUS treatment for delayed union of fifth metatarsal fractures. METHODS: A retrospective review of patients who were treated with LIPUS following a delayed union of fifth metatarsal fracture was conducted over a three-year period. RESULTS: There were thirty patients (9 males, 21 females) in this cohort. The average age was 39.3 years. Type 2 fractures made up 43% of our cohort. Twenty-seven (90%) patients went on to progress to union clinically and radiologically following LIPUS treatment. Smoking (p=0.014) was predictive of non-union. Assuming that there were 10 delayed unions a year and 6 went on to non-union as previously suggested by a systematic review, the cost savings of using LIPUS (90% success rate; 10 LIPUS machine and surgery for 1 non-union) vs operative intervention (surgery for 6 non-union) equates to a cost saving of £7765 a year. CONCLUSION: There is a role for the use of LIPUS in delayed union of fifth metatarsal fractures and can serve as an adjunct prior to consideration of surgery. The findings of this study also suggest the use of LIPUS to be a cost effective treatment modality compared to surgical management. LEVEL OF EVIDENCE: Level 4.
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