Light-based monitoring enhances fracture healing assessment

Conventional imaging provides only isolated snapshots of the healing bone, often missing early signs of tissue regeneration. “CT scans and X-ray images only ever provide us with snapshots, but what unfolds between two scans or two images is largely invisible,” says Ganse. The new approach allows continuous monitoring through the skin, giving both medical professionals and patients more timely insight into the healing process. 

The technique relies on commercially available devices that use laser Doppler technology and white light spectroscopy to assess blood flow and oxygenation in tissue near the fracture. This light penetrates deep enough to reach superficial bones like the tibia. In clinical studies involving 55 patients with tibial fractures, Ganse’s team detected a characteristic pattern of blood and oxygen levels during healing, which can indicate whether recovery is on track. 

Ganse emphasizes that the method does not replace existing imaging techniques but serves as a rapid control tool to close diagnostic gaps: “Our method is not intended to replace X-ray imaging. We regard it as a useful adjunct.” Early signs of healing complications, such as insufficient immobilization or biological factors like cancer or smoking, can be detected well before they become visible on scans. This enables targeted remedial treatment such as pulsed ultrasound, shockwave treatment, or magnetic field stimulation. 

According to Professor Ganse, small and cost-effective monitoring devices could benefit fracture care, especially in remote areas or low-resource healthcare systems that lack access to radiological equipment. One current limitation is that the technique cannot monitor fractures lying more than five centimeters below the skin. 

MEDICA-tradefair.com; Source: Saarland University