CN217853352U

CN217853352U - Bone measurer for measuring space between pedicle screws

Info

Publication number: CN217853352U
Application number: CN202221156714.8U
Authority: CN
Inventors: 赵光辉; 段树令; 靳力
Original assignee: Anyang Shengjie Technology Co ltd
Current assignee: Anyang Shengjie Technology Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-11-22
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses a bone caliber for measuring pedicle of vertebral arch nail interval, including left arm and right arm, the middle part of left arm and right arm all is provided with articulated portion, and articulated portion of left arm and articulated portion of right arm pass through the pin articulated, all is provided with the plug at the lower extreme of left arm and right arm, fixes being provided with the calibrated scale in the upper end of left arm, fixes being provided with the sliding sleeve in the upper end of right arm, and the sliding sleeve cover is established on the calibrated scale and can freely slide for the calibrated scale. This bone measurement ware makes the range finding reading convenient and fast between the pedicle of vertebral arch nail, improves operation efficiency.

Description

Bone measurer for measuring space between pedicle screws

Technical Field

The utility model particularly relates to a bone measurement ware for measuring pedicle of vertebral arch nail interval belongs to orthopedics medical instrument technical field.

Background

At present, pedicle screw and rod fixing systems frequently used in orthopedic surgery are composed of a plurality of pedicle screws (called 'screws' for short) and connecting rods (called 'rods' for short) for connecting the pedicle screws. The pedicle screw-rod system is widely applied in the field of spinal surgery, and is often required to be used for fixing in posterior operations of diseases such as spinal tumors, spinal degeneration, spinal trauma fracture, scoliosis and the like. During the operation usually need implant the screw on the centrum bone surface earlier, then cut and crooked to the connective bar according to the screw interval, insert the connective bar in the U-shaped groove of screw afterwards, reuse is revolved the nail and is fastened the connective bar and make nail, stick become a whole, and the support location fixed function of connective bar in order to accomplish nail stick system is finely tuned at last. Wherein, at the interval in-process of measuring the screw, because the opening of operation is all less, conventional measuring tool receives space constraint and uses inconveniently, and the reading is inconvenient and measuring error is great, has influenced going on smoothly of operation.

Disclosure of Invention

Problem to prior art exists, the utility model provides a bone caliber for measuring pedicle of vertebral arch nail interval, aim at overcome the difficult measuring problem of pedicle of vertebral arch nail interval that exists among the prior art, provide a but convenient and fast's measurement centrum bone face goes up interval measuring tool of adjacent pedicle of vertebral arch screw.

The technical scheme of the utility model as follows: the utility model provides a bone measurement ware for measuring pedicle of vertebral arch nail interval, includes left arm and right arm, the middle part of left arm and right arm all is provided with articulated portion, and articulated portion of left arm and articulated portion of right arm pass through the pin and articulate, all is provided with the plug at the lower extreme of left arm and right arm, fixes being provided with the calibrated scale in the upper end of left arm, fixes being provided with the sliding sleeve in the upper end of right arm, and the sliding sleeve cover is established on the calibrated scale and can freely slide for the calibrated scale.

Furthermore, the dial is arc-shaped, and scale indication is arranged on the dial.

Further, the plug is cylindrical, and the tail end of the plug is hemispherical.

Further, an arrow indicator is arranged on the sliding sleeve.

Has the advantages that: bone measurement ware when using, makes the plug of left arm and right arm lower extreme insert respectively to measure in the U-shaped groove of two pedicle of vertebral arch nails of measuring, and the operation region is kept away from to the upper end of left arm and right arm, because left arm and right arm are articulated, utilizes fulcrum and lever principle, through reading out arrow point instruction on the sliding sleeve and the corresponding position of scale indication on the calibrated scale, can easily reach the interval between the pedicle of vertebral arch nail for range finding reading convenient and fast improves operation efficiency.

Drawings

Fig. 1 is a schematic view of the structure of the bone measuring device of the present invention.

Fig. 2 is a schematic structural view of the left arm.

Fig. 3 is a schematic structural view of the right arm.

Fig. 4 is a structural diagram of a common pedicle screw.

Fig. 5 is a schematic view showing a measurement use state of the bone measuring instrument.

The labels in the figure are:

1 left arm, 11 left arm hinge part, 12 dial and 13 left arm plug;

2 right arm, 21 right arm hinge, 22 right arm plug, 23 slip on, 231 arrow;

3, pins;

4 pedicle screws, 41U-shaped grooves.

Detailed Description

The following provides a clear and complete description of the present invention with reference to the accompanying drawings.

As shown in figure 1, the bone measurer for measuring the space between the pedicle screws comprises a left arm 1 and a right arm 2, wherein the left arm 1 and the right arm 2 are hinged together through a pin 3, and both the left arm 1 and the right arm 2 can freely rotate around the pin 3.

The structure of the left arm 1 is shown in fig. 2, the main structure of the left arm 1 is a cylindrical straight rod, a flattened left arm hinge part 11 is arranged at the middle upper part of the straight rod, and a pin hole is arranged on the left arm hinge part 11; a dial 12 is fixedly arranged on the left side of the upper end of the left arm 1, the dial 12 is arc-shaped, the circle center of the dial is positioned at the center of the pin hole, and scale indication is arranged on the dial; the lower end of the left arm 1 is provided with a left arm plug 13 which is cylindrical, and the tail end of the plug is hemispherical. The plug is matched with the U-shaped groove 41 of the pedicle screw 4, the structure of which is shown in figure 4.

The structure of the right arm 2 is shown in fig. 3, the main structure of the right arm 2 is a bending rod consisting of three sections of cylindrical rods, a flattened right arm hinge part 21 is arranged at the middle section of the bending rod, a pin hole is formed in the right arm hinge part 21, and the hinge part of the left arm and the hinge part of the right arm are riveted and hinged together after passing through the pin hole through a pin; a sliding sleeve 23 is fixedly arranged at the upper end of the right arm 2, an arrow indication 231 is arranged on the sliding sleeve, and the sliding sleeve can sleeve the dial on the left arm therein and can freely slide relative to the dial; the lower end of the right arm 2 is also provided with a right arm plug 22 which is cylindrical, the tail end of the plug is hemispherical, the plug is matched with the U-shaped groove 41 of the pedicle screw 4, and the structure of the right arm plug 22 is the same as that of the left arm plug 13.

The bone measuring instrument is mainly used in thoracolumbar surgery, and the using state of the bone measuring instrument is shown in fig. 5. The pedicle screw 4 is an internal fixation instrument commonly used in spinal surgery, belongs to internal fixation, and firstly drives a plurality of screws from the back of the pedicle to the front vertebral body during the operation, namely implants the screws into the vertebral body, and the vertebral body in fig. 5 is not shown. After the screws are implanted into the vertebral body, the distance between a plurality of two screws is required to be measured so as to cut the connecting rod with proper length and bend the connecting rod, the bone measurer is used at the moment, the plugs at the lower ends of the left arm and the right arm are respectively inserted into the U-shaped grooves of two pedicle screws to be measured, and the U-shaped grooves can be flexibly rotated to be conveniently inserted. The distance between the two plugs at the lower end of the left arm and the right arm is in a definite proportional relation with the distance of the arrow indicating dial at the upper end by utilizing the fulcrum and the lever principle as the left arm and the right arm are hinged, and the distance between the pedicle screws can be easily pushed out by reading the position corresponding to the arrow indication on the sliding sleeve and the scale indication on the dial, so that the distance measurement reading is convenient and quick. Later utilize the screw interval that records to carry out intercepting and crooked to the connective bar, insert the connective bar in the U-shaped groove of screw after that, the reuse is screwed the nail and is fastened and make nail, stick become a whole, through nail stick headtotail back, can have stronger fixed action to whole backbone, let the patient done the operation back, can get off the bed in early stage and move about, be favorable to recovering.

Claims

1. The utility model provides a bone measurement ware for measuring pedicle of vertebral arch nail interval which characterized in that: including left arm and right arm, the middle part of left arm and right arm all is provided with articulated portion, and articulated portion and the articulated portion of right arm of left arm are articulated through the pin, all are provided with the plug at the lower extreme of left arm and right arm, are provided with the calibrated scale in the upper end of left arm is fixed, are provided with the sliding sleeve in the upper end of right arm is fixed, and the sliding sleeve cover is established on the calibrated scale and can freely slide for the calibrated scale.

2. An osteometer for measuring pedicle screw spacing as claimed in claim 1, wherein: the dial is arc-shaped and is provided with scale indications.

3. An osteometer for measuring pedicle screw spacing as claimed in claim 1, wherein: the plug is cylindrical, and the tail end of the plug is hemispherical.

4. An osteometer for measuring pedicle screw spacing as claimed in claim 1, wherein: an arrow indicator is arranged on the sliding sleeve.