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Ultrasound After Tibial Fracture Surgery Does Not Speed Up Healing Or Improve Function

October 28, 2016 By BMJ

Receiving ultrasound after surgery to repair a fractured tibia (shinbone) does not accelerate healing or improve functional recovery compared with sham treatment, finds a trial of US patients published by The BMJ today.

A linked editorial also published says there is now sound evidence that it doesn’t work and suggests “it is time to abandon this ineffective treatment.”

Tibial fractures are the most common long bone fracture. They heal slowly and often further surgery is needed to stimulate or accelerate the healing process. These complications are debilitating for patients and expensive for health systems. As such, tibial fractures have been a prime target for numerous interventions to aid recovery.

(Image credit: woundeducators.com)

Low intensity pulsed ultrasonography (LIPUS) was approved for fracture healing by the US Food and Drug Administration (FDA) in 1994 — and is now widely used to promote fracture healing in North America. But previous trials investigating its effectiveness have had inconclusive results.

To try to resolve this uncertainty, researchers based in Canada and the U.S. conducted a randomized controlled trial to compare fracture healing and functional recovery in patients using either real or sham ultrasound.

The trial involved 501 U.S. adults who underwent surgery for a tibial fracture at 43 North American academic trauma centers between October 2008 and September 2012.

The main (primary) outcome was time to fracture healing over one year, assessed with radiographs (known as radiographic healing). Other outcomes included important functional and quality of life measures reported by patients, such as return to work and leisure activities, and time to full weight bearing.

Each patient received a device to use once a day for 20 minutes at home until their surgeon determined that their fracture showed radiographic healing — or until the 52 week follow-up visit, whichever occurred first.

Active and sham devices had the same visual, tactile, and auditory signals and were therefore indistinguishable.

The researchers found no significant differences between groups for any outcome.

They point to some study limitations, but say these are unlikely to have biased their results. “Addition of LIPUS to usual care for patients with fracture failed to accelerate radiographic healing or improve function,” they conclude.

In a linked editorial, Xavier Griffin, Associate Professor of Trauma Surgery at the University of Oxford, says we now have sound evidence that LIPUS doesn’t work.

He discusses some issues with trial design that meant some participants were unable to fully complete the follow-up schedule. “Fortunately for patients, clinicians, and future clinical guideline groups, the results were eventually clear, despite the influence of outside agencies,” he adds.

“These authors report important patient-centred outcomes with a precise estimate, showing that low intensity pulsed ultrasound is of no benefit to adults with tibial fractures treated with an intramedullary nail,” he writes. “It is time for us to make good use of their determination and abandon this ineffective treatment.”

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