This invention provides a
joint cavity expansion device for shoulder arthroscopic
surgery, comprising a main tube, an injection
balloon, supporting blades, an injection line, a drainage line, and a sealing structure. In use, the main tube is first inserted into the established channel in the
shoulder joint. Water is injected into the injection line through a one-way valve using a
syringe. The liquid enters the injection
balloon through the injection channel, causing it to expand and deploy the supporting blades to support the bottom of the
balloon. The main tube is then screwed outwards, fixing its position via spiral protrusions on the tube wall. Simultaneously, the injection balloon compresses the surrounding
soft tissue, effectively increasing the operating space within the
joint cavity. This
joint cavity expansion device significantly expands the operating space within the joint cavity by compressing
soft tissue with the injection balloon, ensuring flexible operation of surgical instruments without restricting the surgical
field of view. The supporting blades provide stable support when the balloon expands, preventing deformation during
soft tissue compression, thus achieving stable compression of the soft tissue.