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The utility model provides a pair of endoscopic undercutting pipe tongs. The pair of endoscopic undercutting pipe tongs comprises a knife rest (1), a knife blade (2) arranged on the knife rest, a plastic coated layer (3) connected with the knife rest, a spring pipe (4) arranged in the plastic coated layer (3), a sliding ring (5) which drives the spring pipe to stretch and retract, a handle (6) and a positioning pin (14), wherein the knife rest comprises a knife groove (11) formed by a side wall and a limiting step (12) which is arranged in the knife groove and limits the displacement of the knife blade; first positioning holes (13) are also symmetrically formed in the two side walls of the knife groove;

The utility model provides a centrum dilation balloon catheter which sequentially comprises a balloon assembly, a protection sleeve, a handle assembly and a supporting wire assembly in the axial direction. The balloon assembly comprises a core pipe, developing marks, a supporting wire, a balloon, an outer pipe, a protection cover and a limiting port. The core pipe is filled with the developing marks. One end of the supporting wire is located in the core pipe, and a supporting wire assembly is formed by the other end of the supporting wire and a supporting threaded nut. The balloon is arranged outside the core pipe in a sleeved mode and surrounds the core pipe to from

The utility model provides a cutting head of a pair of endoscopic cutting tube tongs. The cutting head comprises a cutter rest (1) and a blade (2) arranged on the cutter rest (1), wherein the cutter rest comprises a cutter groove (11) formed by the lateral wall and a limit step (12) arranged in the cutter groove and used for limiting displacement of the blade, and first positioning holes (13) are symmetrically formed in two lateral walls of the cutter groove. A positioning pin (14) penetrates through the positioning holes to fix the blade. The tail of the blade is positioned through a gap, and a cutting length of the cutting edge is effectively increased. The shape of the cutting edge facilitates machining, and machining cost is reduced. By means of the integral cutter rest, machining time is shortened effectively, and production cost is reduced.

The utility model relates to a double-balloon vertebral body dilating catheter which comprises a balloon assembly, a cannula assembly and a handle assembly. The cannula assembly comprises an outer tube, a support tube and two liquid injection channels, the outer tube is externally arranged on the outside of the support tube, the two liquid injection channels are arranged in a zone between the outer tube and the support tube, a support wire is inserted in the support tube, and two liquid outlet holes which are communicated with two liquid injection tubes in a one-to-one correspondence manner are formed in the outer tube; the balloon assembly comprises two balloons,

The utility model provides a rotatable hose fixtures, including a stepper motor, a left cover and right cover, the spacer sleeve and the intake valve, the stepper motor includes a housing, shaft and positioning control, the positioning the tube from left to right through the housing and the housing is fixed, the interval condom provided in the positioning of the left end of the tube and the positioning tube is fixed, this hose fixture rotatable has designed a sealed structure, so that by the air pressure hose set in a closed structure is fixed, just control the gas inflow and outflow can achieve precise handling hoses,