CN110870788A - Chemical reagent extrusion auxiliary tool and method for extruding chemical reagent - Google Patents
Chemical reagent extrusion auxiliary tool and method for extruding chemical reagent Download PDFInfo
- Publication number
- CN110870788A CN110870788A CN201811053379.7A CN201811053379A CN110870788A CN 110870788 A CN110870788 A CN 110870788A CN 201811053379 A CN201811053379 A CN 201811053379A CN 110870788 A CN110870788 A CN 110870788A
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- Prior art keywords
- piston
- chemical agent
- cylindrical
- tubular
- extruding
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8802—Equipment for handling bone cement or other fluid fillers
- A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
- A61B17/8825—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it characterised by syringe details
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/20—Repairing attrition damage, e.g. facets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Materials For Medical Uses (AREA)
Abstract
An auxiliary tool for fixing a piston while fixing a syringe or the like, which contains a highly viscous chemical agent to extrude the chemical agent, and a method of extruding the chemical agent using the same. The chemical agent extrusion assisting tool includes a tool body of a cylindrical body having a space formed therein for accommodating a tubular container, such as a syringe, containing a highly viscous chemical, such as calcium phosphate-based cement formed by kneading calcium pH. A spherical powder and a kneading liquid composed of an aqueous solution containing a polysaccharide, and an outlet formed at the bottom end thereof. The cylindrical body has a cylindrical space formed therein so as to be open at an upper end surface thereof. The auxiliary tool also has a pusher including a handle portion for pressing in a piston inserted into the tubular container and a tubular body screw engaged with the tool body, and disposed on one side of the handle portion, the piston portion pressing the piston.
Description
Technical Field
The present invention relates to a chemical agent extrusion assisting tool, and also relates to a method of extruding a chemical agent using the chemical agent extrusion assisting tool, a kneader for producing a chemical agent, and a container for forming a chemical agent using the chemical agent extrusion assisting tool.
Background
A spray gun type sprayer for an aqueous paste-like dental material (Japanese patent application laid-open (KOKAI) No.725578/PCT International publication No. WO95/00078) is called an instrument for extruding a chemical agent WHIC through an injection needle or catheter. H is so viscous that the user encounters difficulty in squeezing with his/her fingers. A lance-type injector for resin-based bone cements such as polymethylmethacrylate (PCT International application publication No. WO 94/169511) has also been developed. Further, there has been proposed an ejector which is combined with a compressor such as calcium phosphate-based cement (Japanese patent application laid-open (KOKAI) No.5-317333), which is a highly viscous sludge-like kneaded substance requiring a particularly high pressure. And (4) extrusion molding. However, these ejectors, particularly those associated with compressors, are complex and large in size and are therefore not easy to use. Since the syringes that extrude the bone cement during surgery must be sterilized, they are preferably disposable. The ejector in the above publication is disadvantageous in terms of cost and size. Furthermore, the gun-type injectors conventionally used for extruding dental materials and resin-based bone cements have relatively large diameter outlets and are therefore not suitable for fine extrusion applications, such as topical filling or chemical agent applications.
Disclosure of Invention
The object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a chemical reagent extrusion aid capable of extruding a high viscosity chemical reagent such as calcium phosphate-based cement through a small outlet, which may be disposable; and to provide a method of completely expressing a chemical agent from a syringe barrel or similar container through, for example, an injection needle or catheter by means of an accessory tool.
The technical scheme of the invention is as follows: the tool body comprises a cylindrical body having a space formed therein for accommodating a tubular container containing a chemical agent and having an outlet formed at a bottom end thereof, the cylindrical body having an annular cylindrical space formed on an upper end S thereof. A pusher comprises a handle portion for inserting a piston into a tubular container, and a tubular body provided on the handle portion and pressing on the piston, wherein the circumferential surface and the circumferential surface of the tubular body. The cylindrical body defines an annular cylindrical space in threaded engagement.
Including rotating the handle portion to threadingly engage the circumferential surface of the tubular body and the circumferential surface defining the cylindrical body. An annular cylindrical space for pressing the piston into the tubular container to expel the chemical agent from the tubular container.
The chemical agent includes bone cement.
The bone cement includes calcium phosphate-based cement.
The chemical agent extruding auxiliary tool includes a tool body of a cylindrical body having a space formed therein for accommodating a tubular container containing a chemical agent and an outlet formed at a bottom end thereof, the cylindrical body having an annular cylindrical space formed on an upper end S thereof. Its surface; a pusher including a handle portion for inserting the piston into the tubular container, and a tubular body provided on a side of the handle portion, the tubular body being pressed against the piston; a circumferential surface of a tubular body and a circumferential surface of a cylindrical body defining an annular cylindrical space are threadedly engaged, the kneader including a cylinder formed in the tool body accommodated in the space, the cylinder having a cylindrical portion and a nozzle portion formed at one end of the cylindrical portion; a plug slidably disposed within the cylindrical portion; a piston including a shaft portion extending through the plunger for rotation relative to the piston to move the piston axially onto the cylinder; a kneading portion at one end of the shaft is located between the plug and the nozzle portion, and the other handle portion at the other end F shaft is engaged by the push rod; a stopper for releasably retaining the stopper at the other end of the plunger portion; a cover removably attached to the nozzle portion.
The invention has the beneficial effects that: a high viscosity chemical agent such as a calcium phosphate based cement can be extruded through a small outlet, e.g. a syringe needle, which may be disposable; and to provide a method of completely expressing a chemical agent from a syringe barrel or similar container through, for example, an injection needle or catheter by means of an accessory tool.
Drawings
Fig. 1 is a schematic view of the chemical agent extrusion assisting tool of the present invention.
Detailed Description
The chemical agent extrusion assisting tool includes a cylindrical tool body 5. The tubular container 8 is accommodated in a cylindrical space formed in a central portion of the tool body 5 and is slidable on an inner circumferential surface of the cylindrical space. A recess is formed around an upper end edge of an inner circumferential surface of the cylindrical space. The recess is adapted to prevent the tubular container 8 from slipping out of the cylindrical space. The recess is in a form corresponding to the shape of the flange of the tubular container 8 and prevents the tubular container 8 from rotating with the pusher when the pusher is rotated. An annular cylindrical space 6 surrounding the cylindrical space is open at the upper end surface of the cylinder; i.e. on the end surface of the cylindrical body, into which the tubular container 8 is inserted. An annular cylindrical space 6 extends longitudinally within the cylindrical body to a predetermined depth. So that the piston can be inserted sufficiently into the tubular container 8 to ensure that the chemical agent is completely expelled therefrom. The pusher comprises a handle portion 1 and a tubular body 3. The handle portion 1 and the tubular body 3 may be formed separately and then fixedly secured together by suitable means, for example, by adhesive screw engagement or bonding. However, from the viewpoint of strength, the handle portion 1 and the tubular body 3 are integrally formed. The circumferential surface 2 of the tubular body 3 is in threaded engagement with a circumferential surface 7 of a cylindrical body defining a cylindrical space 6 of the tool body 2. In the case of the depth of the cylindrical space 6, the length of the tubular body 3 is preferably determined so that the piston 5 can be inserted sufficiently into the tubular container 4 to ensure the complete squeezing of the chemical agent. The circumferential surface of the cylindrical body defining the annular cylindrical space 6 of the tool body 5 is in threaded engagement with the circumferential surface of the tubular body 3. Rotation of the handle portion 1 causes the tubular body 3 to enter a cylindrical space 6 formed in the cylindrical body. Further, the piston 4 pressed by the handle portion 1 is inserted into the tubular container 8, thereby extruding the chemical agent. Either one of the two circumferential surfaces of the cylinder defines an annular cylindrical space 6 and the respective inner or outer circumferential surface of the tubular body 3 is threaded. Tapering the pitch of the thread reduces the force required to depress the piston 4. Thickening the pitch increases the pressing speed. Therefore, it is preferably in the range of 1 to 20 mm, particularly preferably in the range of 3 to 10 mm, depending on the viscosity of the chemical agent contained in the tubular container 8. First, a mixed powder of calcium phosphate and a kneading liquid is placed in a mortar. The resulting mixture was kneaded with a pestle. The kneaded cement was loaded into a syringe barrel. The syringe barrel used was a commercially available syringe having a capacity of 10 ml. The injection needle used was a commercially available disposable injection needle (18G). Next, the syringe barrel is accommodated in a cylindrical space formed in the tool body. The flange portion of the syringe barrel is placed in a recess formed around the upper end edge of the inner circumferential surface of the tool body 5, thereby preventing the syringe barrel from slipping out of the tool body. Subsequently, an 18G luer lock needle was attached to the outlet portion of the syringe barrel. Then, the tubular body 6 of the thruster is mounted in an annular cylindrical space 6 formed in the tool body by screwing. The handle portion is rotated to advance the tubular body into the annular cylindrical space, thereby pressing the piston 4 into the syringe barrel by the handle portion, thereby extracting the kneaded cement through the injection needle. The use of the chemical agent extrusion assisting tool described above enables the user to extrude kneaded cement very easily. In addition, the kneaded cement was completely extruded without any residue in the syringe barrel.
Claims (5)
1. A chemical agent extrusion auxiliary tool is characterized in that: the tool body comprises a cylindrical body having a space formed therein for accommodating a tubular container containing a chemical agent and having an outlet formed at a bottom end thereof, the cylindrical body having an annular cylindrical space formed on an upper end S thereof. A pusher comprises a handle portion for inserting a piston into a tubular container, and a tubular body provided on the handle portion and pressing on the piston, wherein the circumferential surface and the circumferential surface of the tubular body. The cylindrical body defines an annular cylindrical space in threaded engagement.
2. A method of extruding a chemical agent according to claim 1 using a chemical agent extrusion aid, characterized in that: including rotating the handle portion to threadingly engage the circumferential surface of the tubular body and the circumferential surface defining the cylindrical body. An annular cylindrical space for pressing the piston into the tubular container to expel the chemical agent from the tubular container.
3. A method of extruding chemical agents as recited in claim 2, wherein: the chemical agent includes bone cement.
4. A method of extruding chemical agents as recited in claim 3, wherein: the bone cement includes calcium phosphate-based cement.
5. A kneader for a tubular container used as an auxiliary tool for extruding a chemical container, characterized in that: the chemical agent extruding auxiliary tool includes a tool body of a cylindrical body having a space formed therein for accommodating a tubular container containing a chemical agent and an outlet formed at a bottom end thereof, the cylindrical body having an annular cylindrical space formed on an upper end S thereof. Its surface; a pusher including a handle portion for inserting the piston into the tubular container, and a tubular body provided on a side of the handle portion, the tubular body being pressed against the piston; a circumferential surface of a tubular body and a circumferential surface of a cylindrical body defining an annular cylindrical space are threadedly engaged, the kneader including a cylinder formed in the tool body accommodated in the space, the cylinder having a cylindrical portion and a nozzle portion formed at one end of the cylindrical portion; a plug slidably disposed within the cylindrical portion; a piston including a shaft portion extending through the plunger for rotation relative to the piston to move the piston axially onto the cylinder; a kneading portion at one end of the shaft is located between the plug and the nozzle portion, and the other handle portion at the other end F shaft is engaged by the push rod; a stopper for releasably retaining the stopper at the other end of the plunger portion; a cover removably attached to the nozzle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811053379.7A CN110870788A (en) | 2018-08-29 | 2018-08-29 | Chemical reagent extrusion auxiliary tool and method for extruding chemical reagent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811053379.7A CN110870788A (en) | 2018-08-29 | 2018-08-29 | Chemical reagent extrusion auxiliary tool and method for extruding chemical reagent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110870788A true CN110870788A (en) | 2020-03-10 |
Family
ID=69717054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811053379.7A Pending CN110870788A (en) | 2018-08-29 | 2018-08-29 | Chemical reagent extrusion auxiliary tool and method for extruding chemical reagent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110870788A (en) |
-
2018
- 2018-08-29 CN CN201811053379.7A patent/CN110870788A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200310 |
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| WD01 | Invention patent application deemed withdrawn after publication |