CN102525606B - Medullary core decompression navigator and medullary core decompression method - Google Patents

Abstract

The invention discloses a medullary core decompression navigator and a medullary core decompression method. The medullary core decompression navigator comprises a guiding plate, three positioning Kirschner wires and a medullary core decompression guiding needle. The guiding plate is provided with three perpendicular positioning holes and an inclined through hole, the three positioning Kirschner wires are perpendicularly fixed in the positioning holes on the guiding plate, and the medullary core decompression guiding needle is disposed in the inclined through hole. The accurate medullary core decompression navigator and the medullary core decompression method thereof realize accurate medullary core decompression for treatment of femoral head necrosis in early and middle stages, and can achieve following four purposes of (1) realizing accurate medullary core decompression; (2) shortening surgery time; (3) reducing amount of bleeding; and (4) reducing radiation injury.

Description

Core decompression navigator and core decompression method

Technical field:

The invention belongs to the field of medical devices, and relates to a core decompression navigation device, in particular to a precise core decompression navigator and a core decompression method thereof.

Background technique:

In the past, core decompression for the treatment of early and mid-stage necrosis of the femoral head mostly relied on the experience of the operator and repeated X-ray fluoroscopy during the operation. Multiple punctures were required, and the cystic degeneration area could not be accurately located. This process will be accompanied by repeated punctures and Radiation damage. Through computer-aided design-rapid prototyping technology, three-dimensional precise positioning can be obtained, and the size and shape of the cystic area can be calculated and displayed; in the virtual surgical environment, the decompression channel can be designed, and the diameter and depth can be calculated. Then complete the production of the navigation board by rapid prototyping technology.

Invention content:

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, provide a core decompression navigator and a core decompression method thereof, realize precise core decompression in the treatment of early and mid-stage femoral head necrosis, and can achieve the following four aspects : (1) Precise core decompression; (2) Shorten operation time; (3) Reduce blood loss; (4) Reduce radiation damage.

The purpose of the present invention is solved by the following technical solutions:

A cord decompression navigator, comprising a guide plate, three positioning Kirschner wires and a core decompression guide needle; the guide plate is provided with three vertical positioning holes and an inclined through hole, and three positioning Kirschner wires The needle is vertically fixed in the positioning hole on the guide plate, and a core decompression guide needle is set in the inclined through hole; three positioning Kirschner wires are drilled into the apex of the greater trochanter and about 50mm below the patient's greater trochanter perpendicular to the sagittal plane of the human body. After reconstruction, the femoral head on the affected side of the patient showed the volume and shape of the cystic region, calculated the decompression channel, and set a core decompression guide needle in simulation. Calculate and determine the position and inclination angle of the inclined through hole on the guide plate for fixing the guiding needle for core decompression.

The thickness of the guide plate is 35mm, the diameter of the positioning hole is 3mm, and the three positioning Kirschner wires are parallel to each other, and the distance between the two positioning Kirschner wires on the lower side is 15mm. The diameter of the three positioning Kirschner wires is 3 mm, and the diameter of one core decompression guide wire is 2 mm.

The core decompression method of the core decompression navigator is carried out according to the following steps:

(1) First, three Kirschner wires with a diameter of 30 mm are drilled perpendicular to the sagittal plane of the human body at the apex of the greater trochanter and about 50 mm below it, and the distance between the two lower needles is about 15 mm. The cortical bone was fixed on the upper end of the femur, and the Kirschner wire was cut at a distance of 50mm from the skin; then a CT scan of the hip joint was performed;

(2) Import the CT scan data of the hip joint into Mimics software, reconstruct the femoral head on the affected side, and display the volume and shape of the cystic change area; calculate the best decompression channel through Mimics software, and simulate a 2 mm diameter core decompression pressure guide pin;

(3) Import the above data into the Pro/e software, and draw a navigation board adapted to three Kirschner wires and a core decompression guide pin at the upper end of the femur; the navigation board is made by rapid prototyping technology;

(4) Before the operation, the precise core decompression navigation board and the core decompression guide needle are routinely sent to the disinfection and supply department for disinfection. , the core decompression guide needle was drilled into the cystic change area of femoral head necrosis through the inclined hole of the navigation board, and the needle insertion distance was based on the position and depth of the cystic change area calculated by Mimics software. Complete the preoperative guidance for precise core decompression.

The precise core decompression navigator and the core decompression method thereof of the present invention realize precise core decompression in the treatment of early and mid-stage femoral head necrosis, and can achieve the following four aspects: (1) precise core decompression; (2) ) shorten the operation time; (3) reduce the amount of bleeding; (4) reduce radiation damage.

Description of drawings:

Fig. 1 is the front view of the core decompression navigator of the present invention;

2 is a rear view of the core decompression navigator of the present invention;

Fig. 3 is a side sectional view of the core decompression navigator of the present invention;

Wherein: 1 is a positioning hole; 2 is a guide plate; 3 is an inclined through hole.

Detailed ways:

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Figures 1, 2, and 3, a cord decompression navigator includes a guide plate, three positioning Kirschner wires and a core decompression guide pin; the guide plate is provided with three vertical positioning holes and An inclined through hole, three positioning Kirschner wires are vertically fixed in the positioning hole on the guide plate, and a core decompression guiding needle is arranged in the inclined through hole.

The thickness of the guide plate is 35mm, the diameter of the positioning hole is 3mm, and the three positioning Kirschner wires are parallel to each other, and the distance between the two positioning Kirschner wires on the lower side is 15mm.

The core decompression method of the core decompression navigator is carried out according to the following steps:

(1) Firstly, three Kirschner wires with a diameter of 3 mm are drilled perpendicular to the sagittal plane of the human body at the apex of the patient's greater trochanter and about 50 mm below. The cortical bone was fixed on the upper end of the femur, and the Kirschner wire was cut at a distance of 50mm from the skin; then a CT scan of the hip joint was performed;

(2) Import the CT scan data of the hip joint into Mimics software, reconstruct the femoral head on the affected side, and display the volume and shape of the cystic change area; calculate the best decompression channel through Mimics software, and simulate a 2 mm diameter core decompression pressure guide pin;

(3) Import the above data into the Pro/e software, and draw a navigation board adapted to three Kirschner wires and a core decompression guide pin at the upper end of the femur; the navigation board is made by rapid prototyping technology;

(4) Before the operation, the precise core decompression navigation board and the core decompression guide needle are routinely sent to the disinfection and supply department for disinfection. , the core decompression guide needle was drilled into the cystic change area of femoral head necrosis through the inclined hole of the navigation board, and the needle insertion distance was based on the position and depth of the cystic change area calculated by Mimics software. Complete the preoperative guidance for precise core decompression.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the method and technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but if they do not depart from the content of the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (2)

1. a core decompression omniselector, is characterized in that: comprise guide plate, three pieces of location Kirschner wires and one piece of core decompression guide needle; On described guide plate, be provided with three vertical locating holes and an inclined via-hole, three pieces of location Kirschner wires are vertically fixed in the locating hole on guide plate, and one piece of core decompression guide needle is set in inclined via-hole; By three pieces of location Kirschner wires are pierced behind the about 50mm place of patient's greater trochanter summit and below perpendicular to human body sagittal plane, reconstruction patient Ipsilateral femoral head demonstrates volume and the shape in capsule change region, calculate relief passage, simulation arranges one piece of core decompression guide needle, the position relationship of the core decompression guide needle arranging according to simulation and three pieces of location Kirschner wires, on calculative determination guide plate for fixing position and the angle of inclination of inclined via-hole of core decompression guide needle.

2. accurate core decompression omniselector as claimed in claim 1, is characterized in that: described guide plate thickness is 35mm, locating hole diameter is 3mm, and three pieces of location Kirschner wires are parallel to each other, and wherein following two pieces of location Kirschner wires are apart from being 15mm.