Ultrasonic-assisted bone instrument
Precise on bone, gentle on critical structures
The ultrasonic-assisted bone instrument from Söring was developed specifically for the resection of bone and offers numerous advantages in spinal surgery, e. g. for decompression procedures. The non-rotating technology allows a very precise and fine approach, so that the surgeon can work closely to critical spinal neurovascular structures such as the dura mater. Additional pressure is avoided, which is extremely important when working in already tight spaces. Due to the longitudinal movement of the sonotrode tip there is also no risk of "grabbing".
Another great advantage compared to other instruments is that bone can be removed in individual pieces, as it is not ground. Thus, removed material can be used further for fusion operations. Thereby artificial bone material or bone graft harvesting can be avoided.
"The bone instrument from Söring offers remarkable tissue selectivity and maximum safety for technically demanding operations on the spine without compromising ablation performance.”
M.Ch Dr. Shrinivas Rohidas, Hospital Management Dr. Rohidas‘ Centre for Minimally Invasive Spine & Neurosurgery, Kolhapur, India
Different sonotrodes for an individual procedure
The surgeon can choose between two sonotrode shapes and lengths and optimize the instrument regarding indication, procedure and access route.
Targeted bone resection
Surgical procedures on the spine are routine operations and yet due to the proximity of important sensitive neurovascular structures, they are always very challenging. They therefore require intelligent solutions, such as the ultrasonic technology from Söring. This method offers the significant advantage that different effects are displayed distinctly and to varying degrees on various types of tissue. Bone is primarily affected by mechanical removal, whereas mostly no mechanical effect is visible on tissue containing collagen with high elastin content (e. g. blood vessels, nerve fibres, dura mater). Due to lower temperature at the tissue tip interface compared to other technologies there is also low risk of heat related damage. This allows precise preparation of the bone in the immediate vicinity of extremely delicate structures on the spine.
Principle of ultrasonic technology in spinal surgery
The ultrasonic oscillations of the sonotrode tip combined with the manual movement of the bone instrument allow a precise and controlled cutting through bone and a targeted bone removal. Elastic structures are significantly more resistant to ultrasonic oscillations. Since they can adapt to the oscillations, they remain intact in the event of contact with the sonotrode tip.
References
* Matthes, M., Pillich, D. T., El Refaee, E., Schroeder, H. W.S., Müller, J.-U.: Heat Generation During Bony Decompression of Lumbar Spinal Stenosis Using a High-Speed Diamond Drill with or without Automated Irrigation and an Ultrasonic Bone-Cutting Knife: A Single-Blinded Prospective Randomized Controlled Study. World Neurosurgery 2018; 111: e72-e81, https://doi.org/10.1016/j.wneu.2017.11.172
What is needed?
- single use sonotrode (rasp or knife)
- reusable bone instrument
- ultrasonic generator SONOCA 185 or SONOCA 300 and accessories
