Abstract
recruited. The accordion operation was performed at the docking site after bone transport. The specific operation process was compression, suspension of adjustment, distraction, retraction. Ultrasound was used to monitor the hematoma, blood flow and callus in and around the docking site at each stage. Results (1) At the compression, there were 14 cases with hematoma and 2 cases without hematoma. (2) The size of hematoma was negatively correlated with the bone healing time of the docking site and the blood flow resistance index. (3) The Adler grading of blood flow gradually increased before the retraction, and then gradually decreased. But the degree of callus mineralization continued to rise. Conclusion (1) Ultrasound can dynamically monitor the change trend of hematoma, blood flow and new callus at the docking site during accordion operation, so as to predict the tendency of bone healing at the docking site. (2) This study can preliminarily demonstrate that the compression stress applied in accordion technique can promote the bone healing at the docking site.
Highlights
Ilizarov technique, known as bone transport technique, can provide continuous, stable and slow distraction stimulation to living bone tissue after osteotomy [1, 2]
(2) This study can preliminarily demonstrate that the compression stress applied in accordion technique can promote the bone healing at the docking site
The hematoma was gradually organized from the periphery to the center during the period of suspended regulation and distraction
Summary
Known as bone transport technique, can provide continuous, stable and slow distraction stimulation to living bone tissue after osteotomy [1, 2]. Under the stimulation of this stress, the regeneration signal system of living bone tissue is activated and amplified, so that it can grow beyond the normal rate of osteogenesis, and the soft tissue around it, including nerves, muscles, blood vessels, skin and so on, can regenerate synchronously This technique has been widely used in clinical practice and has achieved satisfactory results [3], especially in the treatment of bone defects caused by open comminuted fracture of long bone [4, 5] and chronic osteomyelitis [6] and other diseases. This technique has many complications, among which is the difficulty of bone healing at the docking site [7, 8]. Accordion maneuver is a minimally invasive osteogenesis technology derived from the principle of bone transport technology, which induces bone regeneration at the docking site through axial compression, distraction and retraction
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