2 results about "Soft tissues tumors" patented technology

The application relates to the technical field of medical auxiliary devices, in particular to an adjustable fixing support and method for positioning of a four-limb soft tissue tumor radiotherapy, which obtains a pressure displacement time sequence in an initial exploration stage, and filters out a bone support channel and a soft tissue channel based on calculated terminal tangent stiffness, so that an asymmetric fixing strategy can be used accordingly. By determining a bone locking displacement amount, a rigid reference is established on the bone side first, effectively blocking passive displacement of the bone to the soft tissue side; a soft tissue locking displacement amount determined based on effective change of pressure data of the soft tissue channel can quantitatively compensate for rheological properties of the soft tissue and resist stress relaxation. The asymmetric active locking and rheological compensation mechanism based on stiffness difference screening overcomes the problems of target area displacement caused by uneven force and fixing failure caused by tissue relaxation in the traditional symmetric clamping, so that the application has higher accuracy for positioning of four-limb soft tissue tumor radiotherapy.

This invention provides a needle for bone and soft tissue tumor biopsy, comprising a needle body, a ring-taking probe, and a pusher. The needle body includes an outer cannula and a core. A channel is formed through the inner part of the outer cannula. The core is inserted into and exits the channel during puncture. The two ends of the outer cannula are a first end and a second end, respectively. The two ends of the core are a third end and a fourth end, respectively. The third end is a needle tip that extends beyond the first end, and the fourth end is used to engage with the second end to form a handle. A depth fixation device is installed on the outer wall of the outer cannula for adsorption onto the tissue surface. The ring-taking probe is inserted into the channel of the outer cannula after the core is removed to extract tissue samples. The distal inner wall surface of the ring-taking probe has a barbed structure. The pusher is inserted into the outer cannula after sample extraction to completely push out any remaining tissue from the outer cannula. This invention can improve the accuracy and comfort of bone and soft tissue tumor biopsy, reduce the sampling failure rate during puncture, and increase the sample volume.