The invention discloses a universal
pedicle screw pressure injection system device and relates to
medical instruments. The universal
pedicle screw pressure injection system device comprises a, a screw, b, a connecting device and c, a pressure
injector; in the screw, a
screw head (1) is embedded into a sunken arc surface at the lower end of a U-shaped connecting piece (7); an internal hexagonal counter hole (6) is formed at the top end of the
screw head (1); a through lower U-shaped slot (5) is formed at the lower end of the mid-lower part of a screw rod; an upper circular hole (3) is formed on the right side of the U-shaped slot (5); a middle elliptical hole (4) is formed at the position, a screw
pitch lower than the upper circular hole (3), on the left side of the U-shaped slot (5); in the connecting device, the outer
screw thread at the upper end of a connecting
pipe (10) and the lower end are engaged with the inner
screw thread of a pressure
injector barrel bottom output
pipe (11); the lower end of the connecting
pipe (10) is a hexagonal pipe head inserted into the internal hexagonal counter hole (6) at the top end of the
screw head (1); the outer
screw thread at the lower end of a rotary
handle pipe (9) is engaged with the inner screw thread of the U-shaped connecting piece (7); in the pressure
injector, the outer screw thread on the upper part of an outer
barrel (12) is engaged with the inner screw thread of an outer
barrel cover (14); the screw thread in the barrel is engaged with the outer screw thread of a
vertebra rod (13); and the barrel bottom output pipe (11) is provided with an inner screw thread. The universal
pedicle screw pressure injection system device has the characteristics of high pedicle screw inner fixing stability, simple device structure, good operation
operability and reduced
bone cement leakage, and meets the requirement of clinicians on
osteoporosis centrum inner fixing.