JP3250127B2 - Biological cement injection jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological cement filling apparatus capable of filling a predetermined portion with a biological cement.

[0002]

BACKGROUND ART Biological cements such as calcium phosphate cements are usually kneaded with an appropriate hardening liquid and filled into a predetermined diseased part in a fluid state such as a paste. A method of pushing it into a predetermined place is adopted.

[0003] As an apparatus for filling a predetermined diseased part with a biomedical cement in a fluidized state, for example, an injector in the form of a syringe has conventionally been generally used. Also, in order to properly fill the predetermined affected part with the biomedical cement as much as possible. Various shape changes and the like have been proposed. By the way, there is a strong demand from doctors for minimizing the burden on patients by minimizing the invasion caused by surgery. However, on the other hand, there is also a demand for increasing the therapeutic effect by spreading the biological cement spread to the target site.

A description will be given of an example of osteoporosis surgery, which has recently received special attention. In osteoporosis, the bone mass of the spine is reduced and, when severe, the vertebral body can cause compression fractures.
In such a case, as shown in FIG. 6, a small hole 1 is made in the vertebral body, and the discharge pipe 3 of the injector 2 is inserted into the hole 1 to fill the inside with the biomedical cement. Since the bone mass is significantly reduced and it is in a porous state, biomedical cement penetrates into the peripheral part from the hole opened in the vertebral body,
It is an effective treatment for osteoporosis. However, many patients are elderly and must undergo major surgery, and the surgical invasion must be kept as low as possible. For this reason, usually make an incision in the back,
A method is used in which a pedicle portion is opened with a drill having a diameter of 6.5 mm or less, and then a biocement is injected into the opening 1 using an injector 2. However, when injecting biomedical cement into a cylindrical opening formed by drilling, a commonly used syringe-type injector has only a discharge pipe at the tip. Injecting biological cement into the aperture with this type of injector only spreads slightly to the peripheral wall and tip and more to the periphery. In this case, the therapeutic effect of injecting the biocement cannot be expected much. Therefore, development of a device that can be spread around the opening and sufficiently filled with biocement has been desired.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to fill a diseased part of a patient with a living body cement as much as possible while minimizing the invasiveness of surgery and filling a predetermined portion with a proper amount of the living body cement. To develop an injection device that can be used.

The present applicant has previously filed a Japanese Patent Application No. 6-109400 "Biological cement filling apparatus" as an apparatus for achieving the above-mentioned object. An object of the present invention is to provide a living body cement injection jig which can be easily attached to a commercially available syringe and can be easily used, and which is excellent in cost performance.

[0007]

According to the present invention, there is provided a living body cement injection jig in which a plurality of openings are formed in a side surface, one end is closed, and the other end is an injector such as a syringe. And a connecting portion for connecting and fixing a syringe or the like in connection with the fitting port of the living body insertion tube or the fitting hole.

More specifically, one end of a hollow columnar body having an arbitrary shape is closed, and the other end has a fitting port for inserting and removing a discharge pipe of an injector such as a syringe. A living body insertion tube having a plurality of openings formed therein, and a screw hole penetrating through the side wall of the fitting port, and a connecting portion having a fixing bolt screwed into the screw hole. It is an injection tube.
When the discharge tube of the injector is inserted into the fitting hole, a fixing bolt is screwed into the screw hole, and the living body insertion tube is fixed to the discharge tube of the injector.

Next, one end of the hollow columnar body having an arbitrary shape is closed, and the other end has a fitting port for inserting and removing a discharge pipe of an injector such as a syringe. A living body insertion tube having an opening, a projection protruding from the edge of the other end, a band-shaped abutment plate provided in connection with the projection, and a fixing band provided on the plate. A cement injection jig for a living body having a connecting portion.

[0010] One end of a hollow columnar body having an arbitrary shape is closed, and the other end has a fitting opening for inserting and removing a discharge pipe of an injector such as a syringe. A living body insertion tube having a hole formed therein, and a contact seat where the cylinder bottom surface of the injector abuts on the other end of the living body insertion tube, and a split cylindrical fixing tool connected to an outer peripheral edge of the corresponding seat. A cement injection jig for a living body having a connecting portion.

One end of a hollow columnar body of an arbitrary shape is closed, and the other end has a fitting port for inserting and removing a discharge port of an injector such as a syringe. A living body insertion tube having a bore, and a contact seat at the other end of the living body insertion tube with which the cylinder bottom surface of the injector abuts. And a connecting part comprising a cylindrical fixing member which is slidable and removable.

[0012] One end of a hollow columnar body of an arbitrary shape is closed, and the other end has a fitting port for inserting and removing a discharge port of an injector such as a syringe. A living body insertion tube, and a spiral screw groove provided on a side surface on the other end side of the living body insertion tube, a tip outer surface is tapered, and a plurality of rectangular cut grooves are provided at the tip portion. Inserted into the fitting opening, and a nut having a tapered portion at the distal inner end is screwed into a thread groove of the living body insertion tube, and the living body insertion tube is inserted into a discharge tube of the injector. A cement injection tube for a living body, comprising a connecting portion for connecting the two.

[0013] One end of a hollow columnar body of an arbitrary shape is closed, and the other end has a fitting port for inserting and removing a discharge port of an injector such as a syringe. A living body insertion tube, a spiral thread groove is provided at the other end of the body insertion tube, the outer surface of the other end is tapered, and a plurality of rectangular split grooves are provided at the body insertion tube. A cement injection tube for a living body, comprising: a nut having a tapered portion at an inner end on the distal end side screwed into a thread groove of the living body insertion tube; and a connecting portion for connecting the living body insertion tube to a discharge pipe of the injector.

[0014]

The living body insertion tube of the living body cement injection jig of the present invention is inserted directly into a living body and extrudes the living body cement laterally from a plurality of apertures formed in the side surface thereof, and is applied to an affected part of a patient. Used for filling purposes. The maximum outer diameter is preferably 8 mm or less in diameter to suppress invasion of the patient.

Further, the minimum outer diameter is required to be 3 mm or more in order to secure an inner diameter sufficient to extrude the biomedical cement and to maintain the strength of the living insertion tube at a practical level. Further, it is particularly preferable that the maximum outer diameter of the living body insertion tube be 6.5 mm or less and the minimum outer diameter be 4 mm or more in consideration of suppression of surgical invasion and strength of the living body insertion tube. Further, the length is preferably in the range of 10 to 100 mm in order to facilitate the operation, but the maximum length is not particularly limited.

The shape of the living body insertion tube is not particularly limited, and any shape such as a circle, an ellipse, a rectangle, and a polygon may be used as long as the biocement can be extruded.
This is particularly preferable because a circle can be easily formed and operated in the present shape.

The living body insertion tube does not necessarily have to be a straight body, but may be curved within a range that does not increase the invasiveness of surgery. Can be formed.

A plurality of openings are provided on the side surface of the living body insertion tube for discharging the cement for living body. When the living body insertion tube is inserted into the hole drilled in the affected part, the living body cement is discharged from the side surface of the living body insertion tube, so that the living body cement can be widely spread around the periphery of the hole. Become. The shape of the opening for discharge provided in the living body insertion tube is not particularly limited as long as there is no problem in extruding the cement for living body, and the size of the opening is also approximately 0.5 mm in diameter. As long as it has an area equal to or larger than the area of the circle, it can be set arbitrarily within a range that does not impair the strength of the living body insertion tube. In addition, the number of apertures for discharging the biocement is at least two,
It is preferable that the number is four or more, because the biological cement paste can be rapidly and widely discharged in all directions. The upper limit of the number of apertures can be arbitrarily selected as long as the strength of the living body insertion tube is not impaired. The position at which the opening is provided is not particularly limited as long as it is a side surface of the living body insertion tube. It is preferable to disperse them at positions, and it is not preferable to collect them in one place.

The living body cement injection jig of the present invention is used by mounting it on a commercially available syringe or the like. The structure of the connecting portion for connecting and fixing the syringe or the like is as follows. The structure is not particularly limited as long as the structure does not hinder the paste from being discharged from the opening provided in the injection jig. A typical method is as shown in FIGS. 1 to 8, in which a discharge port of a syringe or the like is fitted into a fitting port of the injection jig and fixed with a screw or the like, or a cylinder of a syringe or the like. There are those which fix the portion with a coupling member such as a band, and the like, and these structures will be described in detail in Examples.

The material used for the living body cement injection jig of the present invention is not particularly limited as long as it can be sterilized and can perform the operation of injecting the living body cement into the affected part. , Polypropylene, methylpentene, polycarbonate, polystyrene, polyethylene,
Resins such as fluororesins, metals such as stainless steel, iron and aluminum and alloys thereof can be used. Also, since the required properties are different between the insertion tube and the joint, it is not necessary to use the same material for the insertion tube and the joint. Particularly, the joint must have strength and properties for fixing the injector. Because it is done.

The biocement used in the present invention is not particularly limited as long as it is a cement commonly used as a calcium phosphate cement for medical and dental purposes. The cement mainly contains α-type tricalcium phosphate, quaternary calcium phosphate and the like. Cement, specifically, α-type tribasic calcium phosphate or quaternary calcium phosphate alone and a mixture thereof, a mixture of α-type tribasic calcium phosphate and dibasic calcium phosphate and / or monobasic calcium phosphate, quaternary calcium phosphate and dibasic calcium phosphate and / or Alternatively, a mixture of monobasic calcium phosphate and a mixture of α-type tribasic calcium phosphate, quaternary calcium phosphate, and dibasic calcium phosphate can be preferably exemplified.

The hardening solution is not particularly limited as long as it is used as a hardening solution for medical and dental use, and specific examples thereof include water; polyacrylic acid, citric acid, malic acid or an organic mixture of these. An aqueous solution in which an acid is dissolved; an aqueous solution in which a water-soluble salt of sodium chloride, sodium chondroitin sulfate, sodium succinate, sodium lactate, or a mixture thereof is preferably used. In addition, since these biological cements can be easily dissolved with dilute hydrochloric acid or dilute nitric acid, the jig once used can be repeatedly used by washing with these acids.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, typical embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 is a side view showing a first embodiment of the present invention.
The living body insertion tube 11 is composed of a connecting portion 12 and the living body insertion tube 11 closes a distal end portion of a cylindrical body having a diameter of 6.5 mmφ and a length of 50 mm, and has an average diameter of 1.0 mm on a side surface of the distal end portion.
A structure in which a substantially circular opening 13 for discharging two or more biological cements having a diameter of not less than mmφ is provided, and a fitting port 16 for inserting and removing a syringe needle mounting nozzle 14 of a syringe 15 is provided at a distal end thereof, 12 is a nozzle 14
Is provided with a hole 18 into which a fixing bolt 17 for fixing the screw is screwed. The commercially available cement paste is filled into a cylinder 15 of a commercially available syringe, and a nozzle 14 attached to an end of the cylinder of the syringe is inserted into a fitting port 16 of the living body insertion tube 11 and provided on a side surface of the fitting port 16. Tighten the nozzle 14 with the fixing bolt 17, and set the syringe 1
5 is fixed to the living body insertion tube 11. After bleeding the syringe and the living body insertion tube, insert the living body insertion tube into the hole opened with a drill or the like in the trunk of the patient, and gradually pull up the living body insertion tube from the opening toward the hole side wall of the affected part. Discharge and fill bio-cement. At this time, the nozzle of the syringe is standardized, and if the shape of the fitting port is matched to this shape,
All commercially available syringes other than special ones can be used.

A nozzle having a special nozzle shape can be mounted via a fitting jig adapted to the nozzle shape, and if this jig is prepared, it can be used for an injector of any shape. Available.

Further, the fixing bolt is unnecessary if it is not easily removed when the fitting port and the nozzle of the syringe are inserted.

A conical projection may be provided inside the distal end portion of the living body insertion tube as shown by a dotted line in FIG. 1 so as to easily discharge the living body cement, and as shown in FIG. If the edge of the closing plate is partially cut out and an opening is formed diagonally forward, it is possible to discharge the biocement in a wider range.

FIG. 2 shows that the living body insertion tube 11 has a large number of apertures 1.
3 and the structure of the connecting portion 12 is
A protruding plate 21 which projects horizontally continuously from the end of the first plate, a half-moon-shaped backing plate 22 which rises perpendicularly to the edge of the protruding plate 21, and at least one or more cylinders 15 of the syringe on the backing plate 22; Is provided with a fixing band 23 for fixing
The fixing band 23 presses the cylinder 15 of the syringe against the backing plate 22 to fix it. It is preferable to use an elastic material such as silicone rubber as the fixing band because the tightening condition can be easily adjusted. An O-ring or rubber band made of an elastic material such as silicon rubber may be used as the fixing band. The joint of this structure can be applied to syringes of any cylinder diameter by adjusting the fixing band.

FIGS. 3 and 4 are very similar in the structure of the connecting portion. In FIG. 3, a contact seat 31 is provided at the end of the living body insertion tube 11 so that the bottom surface of the cylinder 15 of the syringe abuts.
It is composed of a split cylindrical fixing tool 32 rising from the edge of the contact seat 31, and the inner diameter of the contact seat 31 is, for example, 10 ml of thermolysin (code number SS-10ES).
And the inner diameter of the split cylindrical fixture 32 is set to be the same as or slightly smaller than the outer diameter of the cylinder 15 of the syringe.
In FIG. 4, the outer wall of the syringe 1 is slid and inserted into the inner wall of the cylindrical fixture 41 raised from the contact seat 42, and the syringe 15 is connected to the living body insertion tube 11.
This is a joining method that does not use a fixing band and a fixing bolt. In this method, a syringe or the like is pushed into a split cylindrical or cylindrical fixture, and the nozzle of the syringe is inserted into the fitting opening of the living body insertion tube and attached. The living body insertion tube is held by the syringe by frictional force with the inner surface of the fixture. Therefore, it is preferable to use a material made of a polymer such as polypropylene, polystyrene, or fluororesin, which can be slightly deformed, as a material used for the fixture.

FIG. 5 shows that although the overall configuration of the living body insertion tube 11 is the same, a spiral screw groove 54 is provided on the outer surface on the distal end side of the living body insertion tube 11, and a rectangular split groove 52 is provided on the distal end portion. 3
A cylindrical fastening tube 53 provided at a location and having a tapered outer surface at the distal end is inserted into the fitting opening 16 in the living body insertion tube 11, and a nut 51 having a tapered portion 55 at the distal inner end is inserted into the living body inserting tube. The nut 51 is screwed into the thread groove 54 of the pipe 11.
By pressing the distal end of the tightening tube 53 with the tapered portion 55, the end of the tightening tube 53 contracts, and the nozzle of the syringe is tightened. Further, instead of using this method, the outer surface of the distal end portion of the living body insertion tube is tapered without using a cylindrical fastening tube, and a vertically split groove is provided at the distal end portion of the living body insertion tube so as to be rectangular. The same effect can be obtained by screwing the nut into the thread groove of the tube.

FIG. 5 shows the method of tightening the nozzle of the syringe. However, the structure may be combined with FIG. 4 to tighten the cylinder of the syringe. It is also possible to handle syringes with different cylinder diameters by simply preparing ones with different inner diameters.

[0032]

According to the effects of the present invention, it is possible to fill the affected part without increasing the invasiveness of the operation during the operation of filling the bone of the patient with the biocement, which is a powerful treatment method for osteoporosis. Since it is possible to use a commercially available syringe, there is no need to provide a special syringe for injection, and the structure is simple and the manufacturing cost is low, so the purchase price is low and it can be stored. It is a jig for injecting cement for living body, which has an excellent effect of saving space and the like.

[Brief description of the drawings]

FIG. 1 (A) is a side view showing a first aspect of the present invention, and FIG. 1 (B) is a view on the line AA.

FIG. 2 (A) is a side view showing a second aspect of the present invention, and FIG. 2 (B) is a view on arrow AA.

FIG. 3 (A) is a side view showing a third mode of the present invention, and FIG. 3 (B) is a plan view thereof.

FIG. 4 is a side view showing a fourth embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the present invention.

FIG. 6 is a conceptual diagram in which an osteoporosis patient is filled with a biological cement.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 Cement injection jig for living body 31 Contact seat 11 Living body insertion tube 32 Fixture 12 Connecting part 41 Contact seat 13 Opening part for discharging cement for living body 42 Fixture 14 Injector nozzle (discharge pipe) 51 Nut 15 Injector 52 Split Groove 16 Fitting Port 53 Tightening Pipe 17 Fixing Bolt 54 Screw Groove 21 Protrusion 55 Taper 22 Patch Plate 23 Fixing Band

Claims (1)

(57) [Claims] 1. A plurality of apertures for discharging biocement are provided on a side surface of a pipe, one end is closed, and a fitting port for inserting and removing a discharge pipe of an injector is provided on the other end. A living body injection pipe and a fitting portion of the living body injection pipe or a connecting part connected to the living body injection pipe for fixing the injector.