CN104905817A - Ultrasonic positioning system for intramedullary nail fixation - Google Patents

Abstract

The invention provides an ultrasonic positioning system in intramedullary nail fixation, which includes an intramedullary nail fixation part, an image acquisition part and an imaging part. The intramedullary nail fixation part includes the intramedullary nail, the locking nail matching the keyhole on the intramedullary nail, the handle used to assist the intramedullary nail implanted in the bone cavity, and the positioning rod connected with the handle; the image acquisition part includes the bracket board, the ultrasound probe bracket that can slide along the bracket board, and the ultrasound probe that is detachably connected to the ultrasound probe bracket; Corresponding to the hole, determine the punching position on the bone.

Description

An Ultrasonic Positioning System in Intramedullary Nailing

technical field

The invention belongs to the field of medical devices, and in particular relates to an ultrasonic positioning system in intramedullary nail fixation.

Background technique

Intramedullary nails are widely used in long tubular bone joints. The intramedullary nail with a locking nail can fix the bone tissue and the intramedullary nail together, so that the bone tissue can maintain alignment. This surgical method has the advantages of small trauma, firm fixation, high fracture healing rate and low infection rate. The advantages. At present, the method of implanting the intramedullary nail into the long tubular bone for osseointegration is to first connect the intramedullary nail with the U-shaped handle and the positioning rod to form the intramedullary nail fixing device, and then adjust the positioning through hole and the medullary positioning hole at the distal end of the positioning rod. The keyhole at the distal end of the inner nail is in a straight line, and then the intramedullary nail is inserted into the bone cavity by holding the U-shaped handle, and the sleeve is inserted into the positioning through hole, and the drill bit is inserted through the center of the sleeve to drill the bone wall, and then the Insert locking pins to fix. However, due to differences in individual physiological radians, the long bones of the human body are not ideally straight, especially the proximal end of the femur protrudes outward. When the intramedullary nail is inserted, unexpected bending and deformation will occur in the bone, resulting in the displacement of the distal end of the intramedullary nail. The locking hole and the positioning through hole on the positioning rod are not in a straight line. At this time, it is easy to drill holes in the bone. Leading to failure of locking nail placement, or even failure to insert locking nails. Therefore, in the implantation and fixation operation of the intramedullary nail, it is very important to position the drilling hole on the bone.

In manual surgery, if the position of the keyhole and the positioning through hole are not in a straight line, it is necessary to make a skin incision on the tissue and re-drill the hole on the bone, causing additional iatrogenic trauma, and the operation steps are complicated and the intensity is increased. big. At present, in intramedullary nailing surgery, the more commonly used auxiliary navigation system is intraoperative X-ray navigation, which can effectively assist the operation, but the continuous use of X-rays will generate a large amount of radiation, which will cause health damage to doctors and patients.

Contents of the invention

The present invention is made to solve the above problems. By providing an ultrasonic positioning system in intramedullary nailing, real-time imaging can be performed, and the positioning device can accurately determine the drilling position on the bone.

The present invention adopts following technical scheme:

The ultrasonic positioning system in intramedullary nailing provided by the present invention is used for positioning the perforation position on the patient's bone, and has an intramedullary nail fixing part, including an intramedullary nail, which matches the keyhole on the intramedullary nail The locking nail and the handle and the positioning rod for implanting the intramedullary nail in the bone cavity are characterized in that it also has an image acquisition unit and an imaging unit. The image acquisition part includes a bracket plate connected with the positioning rod, which can slide along the axial direction of the positioning rod; an ultrasonic probe bracket, connected with the bracket plate; an ultrasonic probe, which is detachably connected with the ultrasonic probe bracket, and is used to scan the punching position to obtain Ultrasonic image, the imaging part is connected with the ultrasonic probe, used to display the ultrasonic image, so that the doctor can correspond to the locking nail and the positioning through hole according to the ultrasonic image, and determine the drilling position on the bone.

Further, the ultrasonic positioning system in intramedullary nailing provided by the present invention may also have such a feature: the upper end of the bracket plate is connected to the suspension rod and connected to the positioning rod in a vertical posture through the suspension rod.

Further, the ultrasonic positioning system in intramedullary nailing provided by the present invention may also have such a feature: the support plate is fan-shaped, and the ultrasonic probe support is connected to the left end of the support plate through a rotating shaft, and can slide on the fan-shaped surface.

Furthermore, the ultrasonic positioning system in intramedullary nailing provided by the present invention may also have the following feature: an angle scale is set on the bracket plate.

Furthermore, the ultrasonic positioning system for intramedullary nailing provided by the present invention may also have the following features: the ultrasonic probe is a two-dimensional ultrasonic probe, and the ultrasonic probe bracket is detachably connected by a clamping manner.

Invention function and effect

The invention provides an ultrasonic positioning system in intramedullary nail fixation, which includes a positioning part and an imaging part. Since the ultrasonic probe bracket can slide along the bracket surface, the detection range of the ultrasonic probe is continuous at the drilling position. Arc-shaped, with a large scanning range, and the ultrasonic positioning system can image the scanning position of the ultrasonic probe in real time without hysteresis, which is conducive to the accurate determination of the drilling position. In addition, ultrasound has no radiation to the human body, and ultrasound navigation is safer.

Description of drawings

Fig. 1 is the structure schematic diagram of the ultrasonic localization system in intramedullary nail fixation of the present invention;

Fig. 2 is a schematic structural diagram of the image acquisition unit of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of an ultrasonic positioning system in intramedullary nailing according to the present invention.

As shown in FIG. 1 , an ultrasonic positioning system 100 in intramedullary nailing includes an intramedullary nail fixing unit 10 , an image acquisition unit 20 and an imaging unit not shown in the figure.

The intramedullary nail fixing part 10 includes an intramedullary nail 1 , a connecting bolt 2 , a U-shaped handle 3 , a locking bolt 4 , a positioning rod 5 and a locking nail 6 . One end of the U-shaped handle 3 is connected to the proximal end of the intramedullary nail 1 through the connecting bolt 2, and the other end is connected to the positioning rod 5 through the locking bolt 4; The positioning through hole matches the keyhole at the distal end of the intramedullary nail 1 to fix the bone tissue and the intramedullary nail 1 together.

FIG. 2 is a schematic structural diagram of the image acquisition unit of this embodiment.

As shown in FIG. 1 and FIG. 2 , the image acquisition unit 20 includes a bracket plate 7 , a suspension rod 8 , an ultrasound probe bracket 9 and an ultrasound probe. Bracket plate 7 is fan-shaped, and one side is marked with angle scale, and the upper end is connected with suspension rod 8, and is connected with suspension rod 8 and positioning rod 5, is vertical posture, can slide along the axial direction of positioning rod simultaneously. The ultrasonic probe support 9 can slide on the fan-shaped surface by rotating the shaft and being connected to the left end of the support plate. The ultrasonic probe and the ultrasonic probe holder 9 are detachably connected by snap-fitting. In this embodiment, the ultrasonic probe is a two-dimensional ultrasonic probe.

The imaging part is connected with the ultrasonic probe, and is used to display the ultrasonic image, so that the doctor can match the locking nail with the positioning through hole according to the ultrasonic image, and determine the perforation position on the bone.

The usage of the ultrasonic positioning system in the intramedullary nailing of the present embodiment is as follows: first, adjust the length and angle of the positioning rod 5 so that the positioning through hole and the locking hole are located on a straight line, and the image acquisition part 20 and the positioning rod 5 Connect; then, hold the handle 3 to implant the intramedullary nail into the bone cavity, rotate the ultrasonic probe bracket 8, make the ultrasonic probe scan on the skin surface, and image in real time on the imaging part, and determine the keyhole of the intramedullary nail according to the ultrasonic image Afterwards, insert the locking sleeve on the positioning through hole of the positioning rod 5, drill holes on the bone tissue through the locking nail sleeve, and then screw the locking nail into the locking hole to connect the bone tissue and the intramedullary The nails are firmly connected together; finally, the connecting bolt 2 and the locking bolt 4 are loosened, and the image acquisition part 20, the handle 3 and the positioning rod 5 are removed, and the whole operation process is completed.

Function and effect of embodiment

This embodiment provides an ultrasonic positioning system in intramedullary nailing, including a positioning unit and an imaging unit. Since the ultrasonic probe bracket can slide along the bracket surface, the detection range of the ultrasonic probe is continuous at the drilling position. The arc shape, the scanning range is large, and the ultrasonic positioning system can image the scanning position of the ultrasonic probe in real time without hysteresis, which is conducive to the accurate determination of the drilling position. In addition, ultrasound has no radiation to the human body, and ultrasound navigation is safer.

The present invention is not limited to the scope of specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the claims, these changes are obvious. The inventions and creations of the present invention are all included in the protection.

Claims (5)

1. the ultrasound positioning system in an internal fixation by intramedullary pin, for positioning the punch position on patient's bone, there is Intramedullary nailing portion, the pinning, the handle be connected with described intramedullary pin near-end and the locating rod be connected with described handle that comprise intramedullary pin, match with the lockhole on described intramedullary pin, described handle and described locating rod are used for auxiliary described intramedullary pin implantable bone intracavity, it is characterized in that also having:

Image acquisition part and imaging division,

Wherein, described image acquisition part comprises:

Supporting plate, is connected with described locating rod, can sliding axially along described locating rod, and the one side of described supporting plate is provided with angle index;

Ultrasonic probe support, is connected with described supporting plate;

Ultrasonic probe, and described ultrasonic probe support removably connects, and obtains ultrasonoscopy for carrying out scanning to described punch position,

Described imaging division is connected with described ultrasonic probe, for showing described ultrasonoscopy, making doctor according to described ultrasonoscopy, pinning is corresponding with described positioning through hole, determining the punch position on bone.

2. the ultrasound positioning system in internal fixation by intramedullary pin according to claim 1, is characterized in that:

Wherein, the upper end of described supporting plate is connected with hanger bar and is connected with described locating rod with vertical posture by described hanger bar.

3. the ultrasound positioning system in internal fixation by intramedullary pin according to claim 1, is characterized in that:

Wherein, described supporting plate is fan-shaped, and described ultrasonic probe support is connected by the left end of turning cylinder with described location-plate, can slide on sector.

4. the ultrasound positioning system in internal fixation by intramedullary pin according to claim 1, is characterized in that:

Wherein, described ultrasonic probe is two-dimensional ultrasound probe.

5. the ultrasound positioning system in internal fixation by intramedullary pin according to claim 1, is characterized in that:

Wherein, described ultrasonic probe support and described ultrasonic probe are removably connected by the mode of clamping.