Ablation device and ablation system

An ablation device, comprising an ablation assembly and an adjustment assembly provided at the proximal end of the ablation assembly, the ablation assembly comprising a support skeleton and an ablation member provided on the support skeleton;

• the adjustment assembly comprising an inner sheath catheter, an outer sheath catheter and a diameter adjustment module, the inner sheath catheter being movably mounted in the outer sheath catheter along an axial direction, the distal end of the outer sheath catheter being connected to the proximal end of the support skeleton, the distal end of the inner sheath catheter being connected to the distal end of the support skeleton, the inner sheath catheter being connected to the diameter adjustment module, the diameter adjustment module being movable along the axial direction to drive the inner sheath catheter to move relative to the outer sheath catheter along the axial direction, so as to make the support skeleton deform to change a radial size thereof;
• wherein the diameter adjustment module comprises a moving member and an operating member connected to the moving member, the proximal end of the inner sheath catheter is fixed to the moving member, and the operating member is capable of being moved to drive the moving member to move along the axial direction, so as to make the inner sheath catheter move along the axial direction;
• wherein the moving member being arranged in an inner cavity of a hollow handle, a side wall of the handle defines a travelling groove which extends therethrough to the inner cavity, the travelling groove extends along the axial direction, and the operating member is inserted in the travelling groove;
• wherein the diameter adjustment module further comprises at least one elastic member connected to the operating member, at least one first rack and at least one second rack that are capable of meshing with each other are provided on surfaces of the handle and the operating member that face to each other along a radial direction;
• the elastic member makes the first rack and the second rack mesh with each other to lock the operating member relative to the handle in the axial direction, and the operating member is capable of sliding along the travelling groove when the first rack and the second rack are disengaged from each other;
• wherein the operating member comprises a connecting portion and a moving portion, the connecting portion is received in the inner cavity of the handle, and the moving portion is inserted in the travelling groove and connected to the connecting portion, wherein the distal end of the moving member defines a positioning slot, and the connecting portion is at least partially accommodated in the positioning slot;
• wherein the at least one first rack comprises two first racks, the at least one second rack comprises two second racks, the two first racks are respectively arranged at two sides of the travelling groove and extend along a length direction of the travelling groove, the two second racks are respectively arranged at two axial ends of a surface of the connecting portion facing to the moving portion, and a width of the connecting portion is greater than that of the travelling groove in a width direction of the travelling groove;
• and
• wherein the elastic member is connected between the moving member and the connecting portion for driving the operating member away from the moving member along the radial direction, wherein a positioning column is provided at a bottom face of the positioning slot of the moving member corresponding to the elastic member one by one, the elastic member is mounted around the positioning column, the connecting portion defines a guiding groove corresponding to the positioning column, the positioning column is capable of sliding in the guiding groove, and the elastic member is compressed when the operating member is pressed to move towards the moving member.

An ablation device, comprising an ablation assembly and an adjustment assembly provided at the proximal end of the ablation assembly, the ablation assembly comprising a support skeleton and an ablation member provided on the support skeleton;

• the adjustment assembly comprising an inner sheath catheter, an outer sheath catheter and a diameter adjustment module, the inner sheath catheter being movably mounted in the outer sheath catheter along an axial direction, the distal end of the outer sheath catheter being connected to the proximal end of the support skeleton, the distal end of the inner sheath catheter being connected to the distal end of the support skeleton, the inner sheath catheter being connected to the diameter adjustment module, the diameter adjustment module being movable along the axial direction to drive the inner sheath catheter to move relative to the outer sheath catheter along the axial direction, so as to make the support skeleton deform to change a radial size thereof;
• wherein the adjustment assembly further comprises a bending module that comprises a main shaft with an inner cavity extending axially through two opposite ends thereof, a sliding member and a driving member, the main shaft defines a position limit groove extending along an axial direction and communicating with the inner cavity of the main shaft, the sliding member is slidably accommodated in the position limit groove, the driving member is mounted around the main shaft, an inner wall of the driving member is provided with internal threads, the sliding member is provided with external threads that mesh with the internal threads, and the driving member rotates along a circumferential direction to drive the sliding member to slide along the position limit groove.