CN112451057A - Brain stereotactic multi-point injector - Google Patents
Brain stereotactic multi-point injector Download PDFInfo
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- CN112451057A CN112451057A CN202011345095.2A CN202011345095A CN112451057A CN 112451057 A CN112451057 A CN 112451057A CN 202011345095 A CN202011345095 A CN 202011345095A CN 112451057 A CN112451057 A CN 112451057A
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3472—Trocars; Puncturing needles for bones, e.g. intraosseus injections
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3478—Endoscopic needles, e.g. for infusion
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
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- Orthopedic Medicine & Surgery (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a brain stereotactic multipoint injector. The brain stereotactic multi-point injector comprises: the two ends of the sleeve are open, and the middle of the sleeve is a cylindrical cavity; the needle core is inserted into the cavity and can move along the sleeve; the needle core comprises a drainage needle core and a plurality of injection needle cores; one end of the drainage needle core is connected with the injection needle core; the drainage needle core and the injection needle core are communicated hollow structures; a gap exists between the drainage needle core and the sleeve, and the size of the gap is 0.5 +/-0.1 mm; the length of the drainage needle core is greater than that of the sleeve; when the injection needle cores are all moved into the sleeve, the injection needle cores are close to each other; when the injection needle core moves out of the sleeve, the injection needle core opens to form an included angle with the drainage needle core. The brain stereotactic multipoint injector can perform single-point puncture and multipoint administration on the same tissue in a body, thereby not only increasing the administration efficiency of a lesion tissue, but also reducing the damage of multiple punctures to the human body; and the structure is simple, and the economical efficiency and the practicability are good.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a brain three-dimensional directional multipoint injector.
Background
The puncture needle is a medical instrument for sampling and injecting tissues of various organs such as kidney, liver, lung, mammary gland, thyroid gland, prostate, pancreas, testis, uterus, ovary, body surface and the like in minimally invasive surgery. In the operation of brain stereotactic transplantation, a small hole is generally drilled in the cranium, and then a puncture needle is used for single-point puncture and injection administration. The administration position of the traditional injection needle is only limited to one point of a pathological change position, and the traditional injection needle cannot inject at multiple points of the pathological change position, so that the administration position in the tissue is few, the medicine injected into the tissue cannot fully permeate into the tissue, and the administration efficiency is greatly reduced.
In the prior art, when the same tissue needs to be subjected to multi-point drug administration, the drug administration can only be performed through multi-angle puncture, so that the injury to a human body caused by multiple times of puncture can be caused.
At present, a toothed multi-point injector similar to a comb shape is reported, but the toothed multi-point injector can only realize multi-point injection on the body surface.
Disclosure of Invention
The invention mainly aims to provide a brain stereotactic multipoint injector, aiming at solving the technical problems that the brain stereotactic multipoint injector can carry out single-point puncture and multipoint administration on the same tissue in a human body, thereby not only increasing the administration efficiency of a lesion tissue, but also reducing the damage of multiple punctures to the human body; and, the brain stereotactic multipoint injector has simple structure, easy manufacture, and good economical efficiency and practicability.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the invention, the brain stereotactic multipoint injector provided comprises:
the two ends of the sleeve are open, and the middle of the sleeve is a cylindrical cavity;
a stylet inserted into the cavity and movable along the cannula; the needle core comprises a drainage needle core and a plurality of injection needle cores; one end of the drainage needle core is connected with the injection needle core; the drainage needle core and the injection needle core are communicated hollow structures; a gap is formed between the drainage needle core and the sleeve; the size of the gap is 0.5 +/-0.1 mm; the length of the drainage needle core is greater than that of the sleeve; when the needle cores are all moved into the sleeve, the needle cores are close to each other; when the injection needle core moves out of the sleeve, the injection needle core is opened to form an included angle with the drainage needle core.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the above-mentioned brain stereotactic multi-point syringe, wherein the drainage needle core and the injection needle core are integrally formed by using an elastic stainless steel material.
Preferably, the brain stereotactic multi-point injector as described above, wherein said needle core is resilient and bendable 90 °.
Preferably, the brain stereotactic multi-point syringe is characterized in that the drainage needle core and the injection needle core are connected through a connecting core; the connecting core is made of elastic stainless steel materials.
Preferably, the brain stereotactic multi-point syringe as described above, wherein said connecting core is resilient and bendable 90 °.
Preferably, the brain stereotactic multi-point syringe as described above, wherein said elastic stainless steel material is selected from SUS304 medical stainless steel or SUS316L medical stainless steel.
Preferably, the brain stereotactic multi-point injector, wherein the angle between the injection needle core and the drainage needle core is 10-90 °.
Preferably, the brain stereotactic multi-point injector is provided, wherein the length of the injection needle core is less than or equal to 1 cm.
Preferably, the number of the injection needle cores is 4-6; the injection needle core is symmetrically distributed at one end of the drainage needle core.
Preferably, the stereotactic multi-point injector for brain described above, wherein one end of said cannula is provided with a tip; the other end of the sleeve is a flat-mouth end.
Preferably, the stereotactic multi-point injector for brain is described above, wherein the flat end is provided with a transparent window.
Preferably, the stereotactic multi-point brain syringe further comprises a solid needle; the outer diameter of the solid needle is matched with the inner diameter of the sleeve; the solid needle is movable along the cannula.
Preferably, the brain stereotactic multi-point injector further comprises a traction piece; the traction piece is connected with the solid piece and is used for pulling the solid needle out of the sleeve.
Preferably, the brain stereotactic multi-point injector further comprises a cutting sleeve; the ferrule is used for restraining all the injection needle cores from opening; the inner diameter of the clamping sleeve is matched with the outer diameter of the drainage needle core; the outer diameter of the cutting sleeve is larger than the inner diameter of the sleeve.
Preferably, the brain stereotactic multi-point syringe as described above, wherein said drainage stylet is rotatable relative to said cannula.
By means of the technical scheme, the brain stereotactic multipoint injector provided by the invention at least has the following advantages:
1. the brain stereotactic multipoint injector provided by the invention adopts a structure of combining a sleeve and a needle core, wherein the needle core comprises a drainage needle core and a plurality of injection needle cores, and the angle between the injection needle core and the drainage needle core can be changed; when the injection needle core and the drainage needle core are both positioned in the sleeve, the injection needle core and the drainage needle core are parallel to each other; when the injection needle core is gradually separated from the constraint of the sleeve along with the pushing of the drainage needle core, the injection needle core is gradually opened, the opening angle of the injection needle core is continuously increased along with the increase of the pushing length of the injection needle core until the injection needle core is completely pushed out of the sleeve, the injection needle core is opened to a design angle, and the liquid medicine to be injected is injected to different medicine feeding points of the same tissue through the drainage needle core and the injection needle core, so that the technical effects of single puncture and multi-point medicine feeding are realized; further, the drainage needle core and the sleeve can rotate; after injection is finished on some parts, the drainage needle core can be pulled out partially, so that the injection needle core is completely retracted into the sleeve, then the needle core is rotated for a certain angle, the drainage needle core is pushed again, the injection needle core is extended out of the sleeve again, and multi-point administration is carried out on a new administration point, so that the administration range of the brain stereotactic multi-point injector is further expanded; the structural design not only increases the drug delivery efficiency of the pathological tissue, but also reduces the damage to the human body caused by multiple times of puncture, so that the pain of the patient is relieved, and the hospitalizing experience is better;
2. according to the brain stereotactic multipoint injector provided by the invention, the drainage needle core and the injection needle core are integrally formed by adopting an elastic stainless steel material, or the drainage needle core and the injection needle core are communicated by adopting a connecting core made of elastic stainless steel, and the structural design ensures that the angle change of the injection needle core relative to the drainage needle core does not need to adopt a complex mechanical structure; on one hand, the brain stereotactic multi-point injector is simple in structure and convenient to manufacture, on the other hand, the possibility of failure of the brain stereotactic multi-point injector is reduced, and the brain stereotactic multi-point injector has good economical efficiency and practicability;
3. the brain three-dimensional directional multipoint injector provided by the invention can realize multipoint administration of tissues in a human body by puncturing human body tissues through puncturing, or inserting the puncture needle into the hole after drilling, overcomes the defect that the multipoint administration can only be realized through multiple times of puncturing or the body surface multipoint administration can only be carried out in the prior art, and has a very good use effect in the fields of brain three-dimensional directional transplantation, intracranial tumor directional multipoint chemotherapy administration, local multipoint injection administration of epileptic foci, intracranial stem cell injection and other tissue multipoint injection anesthesia.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the structure of the brain stereotactic multi-point injector of the present invention-the plunger is fully pushed out of the barrel;
FIG. 2 is a schematic view of the structure of the stereotactic multi-point injector of the present invention-the needle core is partially pushed out of the sleeve;
fig. 3 is a schematic structural view of the brain stereotactic multi-point injector of the present invention-the injection needle core is fully located in the sleeve.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the specific embodiments, structures, features and effects of a brain stereotactic multi-point injector according to the present invention with reference to the accompanying drawings and preferred embodiments.
The invention provides a brain stereotactic multipoint injector, as shown in the attached figures 1 to 3, which comprises:
the sleeve 1 is provided with openings at two ends and a cylindrical cavity in the middle;
a needle core 2 inserted into the cavity and capable of moving along the sleeve; the stylet 2 comprises a drainage stylet 21; one end of the drainage needle core 22 is opened and is used for injecting liquid medicine; the other end is connected with a plurality of injection needle cores 22; the drainage needle core 21 and the injection needle core 22 are communicated hollow structures; the radial maximum size of the natural arrangement of all the injection needle cores 22 after being closed together is less than or equal to the outer diameter of the drainage needle core 21; the outer diameter of the drainage stylet 21 is smaller than the inner diameter of the cannula 1, and the size difference is 0.5 +/-0.1 mm; the length of the drainage needle core 21 is larger than that of the sleeve 1; when the needle cores 22 are all moved into the sleeve 1, the needle cores 22 are close to each other; when the needle core 22 moves out of the sleeve 1, the needle core 22 is opened to form an included angle with the drainage needle core 21.
It should be noted that: the drawings 1 to 3 are only schematic structural diagrams, wherein the part using black thick lines is a sleeve and is positioned outside; the part using the gray thin lines is a needle core and is positioned in the sleeve; fig. 1 to 3 show different states of the stylet after insertion into the sleeve. For convenience of drawing, the parts of the upper and lower bottom surfaces of the sleeve which are shielded are not shown by broken lines, and the parts of the stylet which are shielded by the sleeve are not shown by broken lines, but the line form does not affect the positional relationship between the sleeve which is positioned at the outer side and the stylet which is positioned in the sleeve.
The sleeve can directly puncture human tissues; alternatively, for hard areas such as the cranium, the hole may be drilled in advance and the cannula inserted into the drilled hole. The cannula may also be called a puncture needle.
The cylindrical cavity may act as an internal travel track for the core, enabling the drainage core to travel along the inner wall of the cannula.
In one embodiment of the invention, the inner diameter of the cannula is 5 mm; the outer diameter of the drainage needle core is 4.5 mm; the inner diameter of the injection needle core is 1 mm; the included angle of the injection needle core after being opened is 50 degrees.
The inner diameter of the sleeve has a size difference with the outer diameter of the drainage needle core, the difference is controlled to be 0.5 +/-0.1 mm, and the design aims to ensure that the hollow in the sleeve can be discharged when the needle core is pushed down.
Preferably, the drainage needle core and the injection needle core are integrally formed by adopting an elastic stainless steel material.
Preferably, the stylet is resilient and bendable 90 °.
When the stylet is prepared, the stainless steel material can be melted at high temperature, then the molten slurry is placed in a specific stylet mould for pouring, molding and tempering, and the tempering process parameters are controlled, so that the balance of hardness and elasticity is realized, and the relative angle between the injection stylet and the drainage stylet can be adjusted. When the needle core is restrained, for example, when the drainage core portion and the injection core portion of the needle core are all disposed in the sleeve, the drainage core and the injection core are both disposed in the sleeve, parallel to each other. When the needle core moves in the sleeve, the injection needle core part is positioned outside the sleeve and the drainage needle core is positioned inside the sleeve, or the injection needle core part and the drainage needle core part are both positioned outside the sleeve, the injection needle core is opened, and an included angle is formed between the drainage needle core and the injection needle core. The included angle is uniquely determined by the mold from which the core is made. The tempering process in the preparation of the needle core adopts the prior art of stainless steel processing, and is not described again here.
Preferably, the drainage needle core is connected with the injection needle core through a connecting core; the connecting core is made of elastic stainless steel materials.
Preferably, the connecting core is resilient and bendable by 90 °.
When the connecting core is prepared, the stainless steel material can be melted at high temperature, then the molten slurry is placed in a specific connecting core mould for pouring, molding and tempering, and the tempering process parameters are controlled so as to realize the balance of hardness and elasticity, so that when one end of the connecting core is connected with the injection needle core, and the other end of the connecting core is connected with the drainage needle core, the relative positions of the injection needle core and the drainage needle core can be adjusted; the connection core can be connected with the drainage needle core and the injection needle core by adopting a welding method, and is not particularly limited here. When the connecting core is restrained, for example, when the drainage core portion, the connecting core and the injection core portion of the core are all disposed in the sleeve, the drainage core and the injection core are all disposed in the sleeve parallel to each other. When the needle core moves in the sleeve, the connecting core and the needle core part are positioned outside the sleeve, and the drainage needle core is positioned inside the sleeve, or the needle core part, the connecting core and the drainage needle core part are simultaneously positioned outside the sleeve, the needle cores are opened, and an included angle is formed between the drainage needle core and the needle core. The included angle is uniquely determined by the mold in which the connecting core is prepared. The tempering process in the preparation of the connecting core adopts the prior art of stainless steel processing, and is not described herein again.
Preferably, the elastic stainless steel material is selected from SUS304 medical stainless steel or SUS316L medical stainless steel.
The connecting core or the needle core is made of an elastic stainless steel material which is subjected to tempering treatment. The elastic stainless steel can absorb stress, can be bent in different directions and can be restored to an original state. The tensile strength of the stainless steel material can reach 1100-2300Mpa, and the rebound resilience is good. This allows the hub to be straightened in the cannula with only a small amount of resistance, thereby ensuring that the hub or connecting hub can snap back after the hub has been restrained beyond the cannula, i.e. the hub can be rapidly spread out to its designed angle.
Preferably, the included angle between the injection needle core and the drainage needle core is 10-90 degrees.
The included angle between the drainage needle core and the injection needle core can be designed into different angles according to different tissue administration requirements; the angle is uniquely determined by the configuration of the mold from which the stylet or the connecting core is made.
The drainage stylet may control the length of the needle that is pushed out of the cannula. When the syringe needle core is partially pushed out of the sleeve, the opening angle of the syringe needle core is smaller than the designed angle and can be changed along with the change of the length of the syringe needle core pushed out.
Preferably, the length of the injection needle core is less than or equal to 1 cm.
The drainage needle core is inserted into the sleeve and is pushed inwards to move, so that the injection needle core exceeds the sleeve, and the injection needle core is gradually expanded; when the whole body of the injection needle core exceeds the sleeve, the injection needle core is opened to the designed angle. The liquid medicine to be injected is injected to a plurality of administration points in the tissue through the drainage needle core and the injection needle core. The chemotherapy medicine injected by the brain stereotactic multipoint injector is generally injected in tumor tissues, and the injected stem cells are generally injected in brain tissues. The tumor tissue and the brain tissue are soft tissues, and the length of the injection needle core of the invention is not more than 1cm and is thin, so the injection needle core can move in the tissues without obstruction, and the injection needle core can be rapidly expanded to a designed angle without damaging the soft tissues.
The length of the syringe needle cores can be the same; alternatively, each of the syringe wicks is a different length. The length and the angle of the injection needle core adopt different designs according to the applicable position of the injection needle core in the tissue, the length, the angle and the arrangement of the injection needle core can be flexibly adjusted, and the length, the angle and the arrangement of the injection needle core are uniquely determined by the structure of a mould for manufacturing the needle core or connecting the needle core.
Preferably, the number of the injection needle cores is 4-6; the injection needle core is symmetrically distributed at one end of the drainage needle core.
In one embodiment of the invention, the number of the plungers is four, and the four plungers are arranged in a row.
In one embodiment of the invention, the number of the injection needle cores is four, the four injection needle cores are uniformly distributed in the cross section of the drainage needle core in a front-back left-right mode, and the arc angle between every two injection needle cores is 90 degrees.
In one embodiment of the invention, the number of the injection needle cores is six, the six injection needle cores are uniformly distributed in the cross section of the drainage needle core at the same arc angle, and the arc angle between every two injection needle cores is 60 degrees.
In one embodiment of the invention, the number of the injection needle cores is six, five injection needle cores are uniformly distributed in the cross section of the drainage needle core at the same arc angle, the arc angle between every two injection needle cores is 72 degrees, and the sixth injection needle core is arranged in the middle.
Preferably, one end of the sleeve is provided with a tip; the other end of the sleeve is a flat-mouth end.
The tip design is intended to allow for easier penetration of the cannula into the tissue of the body or insertion into a drilled hole, and the cannula may therefore also be called a puncture needle.
When the needle core is inserted into the sleeve, the injection needle core is used as the front end, the drainage needle core is used as the rear end, the needle core is inserted from the flat end of the sleeve, and after the needle core extends out of the tip end of the sleeve, the injection needle core is opened to the designed position of a drug administration point.
Preferably, the flat end is provided with a transparent window.
The transparent window can be used for observing the dosage condition of the injected liquid medicine.
Preferably, it further comprises a solid needle; the outer diameter of the solid needle is matched with the inner diameter of the sleeve; the solid needle is movable along the cannula.
The cylindrical cavity of the cannula may serve as an internal travel track for the solid needle, enabling the solid needle to travel along the cannula. The solid needle is used for increasing the rigidity of the sleeve; when the cannula pierces a body tissue or is inserted into a drilled hole, the solid needle needs to be inserted into the cannula first; the solid needle can increase the stability of the cannula, and avoid the risk that the cannula is extruded and deformed due to high tissue density when the solid needle directly punctures human tissues or is inserted into a drilled hole, so that the cannula can puncture the human tissues or is inserted into the drilled hole more easily.
Preferably, it further comprises a pulling member; the traction piece is connected with the solid piece and is used for pulling the solid needle out of the sleeve.
After the cannula punctures human tissues or is inserted into a drilled hole, the solid needle needs to be pulled out of the cannula before administration, the stylet is inserted into the cannula in a mode that the injection stylet is the front end and the drainage stylet is the rear end, the stylet is pushed and pressed, the injection stylet naturally expands to a designed angle after exceeding the tip of the cannula and reaches the position of the administration point, and then the injected liquid medicine is injected to a plurality of administration points through the drainage stylet and the injection stylet.
In one embodiment of the invention, the solid needle is placed in the internal moving track before the cannula is inserted into the body tissue or into the drilled hole, and after the cannula is inserted into place, the solid needle is removed from the plain end of the cannula and inserted into the core for injection of the drug. The solid needle is pulled out through the traction needle.
In one embodiment of the invention, the pulling member is connected to the solid needle, the solid needle fills the inner moving track before the cannula is inserted, and the pulling member is used to remove the solid needle from the cannula after the cannula is inserted into position.
Preferably, it further comprises a ferrule; the ferrule is used for restraining all the injection needle cores from opening each other; the inner diameter of the clamping sleeve is matched with the outer diameter of the drainage needle core; the outer diameter of the cutting sleeve is larger than the inner diameter of the sleeve.
The inner diameter of the cutting sleeve is matched with the outer diameter of the drainage needle core, and the design aims to ensure that the cutting sleeve can fix all the injection needle cores in the cutting sleeve, so that the injection needle core is prevented from automatically opening before the needle core is inserted into the sleeve and being prevented from being smoothly inserted into the sleeve.
The outer diameter of the clamping sleeve is larger than the inner diameter of the sleeve, and the design aims to ensure that the sleeve can be blocked by the sleeve after the stylet is inserted into the sleeve so as to ensure that the clamping sleeve automatically falls off, thereby avoiding the influence of the clamping sleeve on the insertion of the stylet and the injection of liquid medicine.
Preferably, the drainage needle core is rotatable relative to the sleeve.
When the injection needle core injects a certain amount of liquid medicine into the same tissue, the drainage needle core can be pulled out by a certain length to retract the injection needle core into the sleeve, then the needle core is rotated by a certain angle, the drainage needle core is pushed to extend the injection needle core out of the sleeve again, and then different parts are dosed, so that the dosing position of the brain stereotactic multipoint injector can be further expanded without re-puncturing human tissues, and the pain of a patient is greatly reduced.
The brain stereotactic multipoint injector can be applied to the stereotactic multipoint chemotherapy administration of tumors in the cranium and the brain, the local multipoint injection administration of epileptic foci, the intracranial stem cell injection, the multipoint injection anesthesia of other tissues and the like.
The brain stereotactic multipoint injector can perform single-point puncture and multipoint administration on the same tissue in a body, thereby not only increasing the administration efficiency of a pathological tissue, but also reducing the damage of multiple punctures to a human body; and, the brain stereotactic multipoint injector has simple structure, easy manufacture, and good economical efficiency and practicability.
The features of the invention claimed and/or described in the specification may be combined, and are not limited to the combinations set forth in the claims by the recitations therein. The technical solutions obtained by combining the technical features in the claims and/or the specification also belong to the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (15)
1. A brain stereotactic multi-point injector, comprising:
the two ends of the sleeve are open, and the middle of the sleeve is a cylindrical cavity;
a stylet inserted into the cavity and movable along the cannula; the needle core comprises a drainage needle core and a plurality of injection needle cores; one end of the drainage needle core is connected with the injection needle core; the drainage needle core and the injection needle core are communicated hollow structures; a gap is formed between the drainage needle core and the sleeve; the size of the gap is 0.5 +/-0.1 mm; the length of the drainage needle core is greater than that of the sleeve; when the needle cores are all moved into the sleeve, the needle cores are close to each other; when the injection needle core moves out of the sleeve, the injection needle core is opened to form an included angle with the drainage needle core.
2. The brain stereotactic multipoint syringe of claim 1, wherein said drainage needle core and said injection needle core are integrally formed of a resilient stainless steel material.
3. The brain stereotactic multipoint injector according to claim 2, wherein said stylet is resilient and bendable 90 °.
4. The brain stereotactic multipoint syringe according to claim 1, wherein said drainage needle core and said injection needle core are connected by a connecting core; the connecting core is made of elastic stainless steel materials.
5. The brain stereotactic multipoint injector according to claim 4, wherein said connecting core is resilient and bendable 90 °.
6. The brain stereotactic multipoint injector according to any of claims 2 to 5, wherein said elastic stainless steel material is selected from the group consisting of SUS304 medical stainless steel or SUS316L medical stainless steel.
7. The brain stereotactic multipoint syringe according to claim 1, wherein said injection needle core and said drainage needle core are at an angle of 10-90 °.
8. The brain stereotactic multipoint injector of claim 1, wherein said injection core has a length of 1cm or less.
9. The brain stereotactic multipoint injector according to claim 1, wherein said number of said injection needle cores is 4-6; the injection needle core is symmetrically distributed at one end of the drainage needle core.
10. The brain stereotactic multipoint syringe of claim 1, wherein one end of said cannula is provided with a tip; the other end of the sleeve is a flat-mouth end.
11. The stereotactic multipoint injector of claim 10, wherein said flat end is provided with a transparent window.
12. The brain stereotactic multipoint syringe of claim 1, further comprising a solid needle; the outer diameter of the solid needle is matched with the inner diameter of the sleeve; the solid needle is movable along the cannula.
13. The brain stereotactic multipoint injector according to claim 12, further comprising a pulling member; the traction piece is connected with the solid piece and is used for pulling the solid needle out of the sleeve.
14. The brain stereotactic multipoint syringe of claim 1, further comprising a ferrule; the ferrule is used for restraining all the injection needle cores from opening; the inner diameter of the clamping sleeve is matched with the outer diameter of the drainage needle core; the outer diameter of the cutting sleeve is larger than the inner diameter of the sleeve.
15. The brain stereotactic multipoint syringe of claim 1, wherein said drainage hub is rotatable relative to said cannula.
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| CN202011345095.2A CN112451057A (en) | 2020-11-26 | 2020-11-26 | Brain stereotactic multi-point injector |
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| CN202011345095.2A CN112451057A (en) | 2020-11-26 | 2020-11-26 | Brain stereotactic multi-point injector |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202027613U (en) * | 2011-03-15 | 2011-11-09 | 浙江海洋学院 | Fork-shaped puncturing sleeve needle |
| CN206934428U (en) * | 2017-02-14 | 2018-01-30 | 南通市传染病防治院（南通市第三人民医院、南通市老年病医院、南通市肝病研究所） | A kind of PTC cyst drainages harden trochar |
-
2020
- 2020-11-26 CN CN202011345095.2A patent/CN112451057A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202027613U (en) * | 2011-03-15 | 2011-11-09 | 浙江海洋学院 | Fork-shaped puncturing sleeve needle |
| CN206934428U (en) * | 2017-02-14 | 2018-01-30 | 南通市传染病防治院（南通市第三人民医院、南通市老年病医院、南通市肝病研究所） | A kind of PTC cyst drainages harden trochar |
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Application publication date: 20210309 |