CN115813761A - Puncture-proof blunt needle of syringe for extracting liquid medicine and use method thereof - Google Patents
Puncture-proof blunt needle of syringe for extracting liquid medicine and use method thereof Download PDFInfo
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- CN115813761A CN115813761A CN202310133732.7A CN202310133732A CN115813761A CN 115813761 A CN115813761 A CN 115813761A CN 202310133732 A CN202310133732 A CN 202310133732A CN 115813761 A CN115813761 A CN 115813761A
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- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 claims description 10
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Abstract
The invention relates to the technical field of medical instruments and discloses a puncture-preventing blunt needle of a syringe for extracting liquid medicine and a using method thereof, and in a first aspect, the puncture-preventing blunt needle of the syringe for extracting liquid medicine comprises a needle rod, wherein the top end of the needle rod is provided with a stress blunt surface, and the minimum cross-sectional area of the top end of the stress blunt surface is 0.03141mm 2 The maximum cross-sectional area of the tip of the force-bearing blunt surface is 0.2827mm 2 The cross-sectional area of the force-bearing blunt surface is gradually reduced towards the top end. In a second aspect, a method of using a puncture-preventing blunt needle for a syringe for drawing medical fluid is applied to the above-mentioned puncture-preventing blunt needle for a syringe for drawing medical fluid. The invention can ensure that the stressed blunt surface can puncture the rubber plug of the liquid medicine bottle and can not cause puncture injury due to the accidental contact of human body with the stressed blunt surface in the process of using the syringe to extract liquid medicine.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a puncture-proof blunt needle of a syringe for extracting liquid medicine and a using method thereof.
Background
Needle stick injuries are the most common and inevitable iatrogenic injuries of medical staff at present. Studies have reported that 70% of the visited medical staff indicate that they experienced at least one needle stick injury in professional career. The occurrence of needle stick injuries can cause physical trauma to medical staff, generate emotions such as tension, anxiety, fear and the like, and possibly cause iatrogenic infections. In addition, sharps injuries can create a heavy economic burden, and studies have shown that the medical costs associated with each needle stick injury are $ 747-2173. At present, due to the application of a large number of intravenous injection tee joints and indwelling needles, the scene of direct intramuscular injection of the injection needle basically disappears. Therefore, needle stick injuries are commonly encountered when holding a syringe, when drawing a medical solution from an ampoule using the syringe, and when drawing a medical solution from a rubber stopper using the syringe.
As shown in fig. 1, the existing syringe needle includes a needle rod, a mounting sleeve for sleeving the syringe needle on the top end of the syringe is arranged at the tail end of the needle rod, the top section of the needle rod is in a tip shape with a cross-sectional area sharply reduced along the top direction, a liquid conveying channel for conveying liquid medicine is arranged in the needle rod from the top end to the tail end in a penetrating manner, and the structure is easy to cause acupuncture injury to a human body in the using process.
Disclosure of Invention
The invention aims to provide a puncture-proof blunt needle of a syringe for extracting liquid medicine and a using method thereof, which can ensure that a stressed blunt surface on the top surface of a needle rod can puncture a rubber plug of a liquid medicine bottle and can not cause puncture injury due to the fact that a human body accidentally touches the stressed blunt surface on the top surface of the needle rod in the process of extracting the liquid medicine by using the syringe.
In order to solve the technical problem, the invention adopts the following scheme:
in a first aspect, a puncture-proof blunt needle for a syringe for drawing a liquid medicine, comprising a needle rod, wherein the top end of the needle rod is provided with a force-bearing blunt surface for poking a rubber plug with the front contact of the rubber plug of a liquid medicine bottle, and the minimum area of the force-bearing blunt surface is 0.03141mm 2 The maximum area of the stress blunt surface is 0.2827mm 2 The forced blunt surface completely seals the top end of the needle bar and is arranged perpendicular to the axis of the needle bar. Its aim at, through the selection and use of the area size scope of the blunt surface of atress and with the setting of needle bar axial line vertically, make the blunt surface of atress can puncture the rubber buffer of liquid medicine bottle or the rubber buffer of xiLin bottle and stretch into the body, and even touch skin by mistake and also can not stab the skin in the operation liquid medicine extraction in-process.
The experimental procedure to derive this range of cross-sectional area is as follows:
1. calculation of the minimum cross section of the blunt surface that cannot penetrate the skin under vertical pressure:
1.1. pressure required for peeling: according to the theory of HeryS et al in the article of Microtextile Microstrips a novel approach to transdermal drug delivery, the skin is pierced with an insertion pressure of 3.183MPa.
1.2. Estimation of the stamping force during vertical pressing: randomly selecting 10 medical staff, simulating the action during normal medicine drawing, testing the force of the error poking, testing each person for 3 times, and obtaining the average value of the force of 0.1N.
1.3. Minimum cross section that does not puncture the skin when pressed vertically: s = F/P, so that the minimum cross-sectional area S =0.03141mm of the stress blunt surface 2 Minimum radius R =0.1mm (provided that the cross section is circular).
2. The smallest cross section of the skin that cannot be pierced by the blunt surface under vertical pressure during horizontal sliding:
new Zealand white rabbits were anesthetized and the whole abdominal tissue with muscle was excised in an area of about 4X 4 cm. Muscle tissue was separated bluntly and the dermal layer of skin was exposed to mimic normal human epidermis. 10 medical staff were selected and held with blunt needles of different cross-sections to simulate normal clinical operating force levels across the dermis of the experimental rabbit. When a blunt needle with the radius of the stressed blunt surface of 0.0012mm is adopted, the skin can be lacerated. The radius of the stress blunt surface is gradually increased, and when a blunt needle with the radius of the stress blunt surface of 0.003mm is adopted, the skin can not be scratched. Therefore, the minimum radius is 0.003mm in the horizontal sliding.
3. The largest cross section of the force-bearing blunt surface capable of breaking the rubber plug is calculated:
3.1. experiment design: according to the first method of the method for measuring the puncture force of the rubber plug and gasket for injection (YBB 00322004-2015), blunt needles with different cross sections are selected for puncture, the test is started by the blunt needle with the radius R =0.1mm, and the force used for puncturing the rubber plug is measured by increasing R by 0.025mm each time.
3.2. The limit of the force is as follows: the average piercing force must not exceed 75N as specified.
3.3. Maximum cross section: when R =0.3mm, the piercing force was 73n, and when R =0.325mm, the piercing force exceeded 75N. Therefore, the maximum cross section of the stress blunt surface is selected to be 0.2827mm 2 R =0.3mm (provided that the cross section is circular).
Furthermore, a transfusion channel for conveying liquid medicine is arranged in the needle rod, and the transfusion channel comprises a transfusion section and a liquid absorption section, wherein the transfusion section is parallel to the axis of the needle rod, and the liquid absorption section is arranged on the side wall of the needle rod and is communicated with the transfusion section. The infusion section and the liquid suction section are both in a linear shape, the liquid suction section is perpendicular to the infusion section, and the infusion section is arranged at the position close to the stress blunt surface. The purpose is that the liquid medicine can enter and exit the needle cylinder of the injector through the needle rod by arranging the transfusion channel.
Further, the stress blunt surface is circular. Its aim at, through the design of the shape of the blunt surface of atress, make the blunt surface of atress to the puncture power of rubber buffer more concentrate, be convenient for puncture the rubber buffer of liquid medicine bottle.
Furthermore, the minimum radius of the stress blunt surface is 0.1mm, and the maximum radius of the stress blunt surface is 0.3mm.
Further, the cross-sectional area of the needle rod is larger than that of the stress blunt surface. Its aim at, through the design of needle bar size, avoid the needle bar to lead to the fact the needle bar to break easily too thin.
Furthermore, a transition section is arranged between the needle rod and the stress blunt surface, the cross sectional area of the transition section is gradually reduced along the direction towards the stress blunt surface, the minimum cross sectional area of the transition section is the same as the area of the stress blunt surface, and the maximum cross sectional area of the transition section is the same as the cross sectional area of the needle rod. Its aim at, through the design of gradual change section, make the blunt top of face of atress puncture the rubber buffer after, the needle bar can prop big puncture hole and enter into the medicine bottle through the puncture hole smoothly gradually.
Furthermore, the outer contour of the side wall of the gradual change section is in a diagonal shape or an arc shape protruding outwards. The purpose is that through the design of the shape of the transition section, the transition section can rapidly open the puncture hole generated by puncturing the rubber plug by the top end of the stressed blunt surface.
Further, the needle bar is cylindrical. The needle rod is arranged in a shape, so that the resistance of the puncture hole generated by puncturing the rubber plug by the top end of the stress blunt surface when the needle rod enters the bottle body can be reduced.
Further, the tail end of the needle rod is provided with a sleeving section, the outer diameter of the sleeving section is larger than that of the needle rod, and a mounting sleeve used for sleeving the injection needle on the top end of the injector is sleeved outside the sleeving section.
In a second aspect, a method for using a puncture-preventing blunt needle for a syringe for drawing medical fluid, applied to the above-mentioned puncture-preventing blunt needle for a syringe for drawing medical fluid, comprises the steps of:
step S1, mounting a blunt needle on an injector;
s2, vertically placing a blunt needle on the top surface of a rubber plug of the liquid medicine bottle or a rubber plug of a vial mouth of a penicillin bottle;
s3, puncturing the blunt needle towards the interior of the liquid medicine bottle or the penicillin bottle, so that the stressed blunt surface punctures a rubber plug of the liquid medicine bottle or a rubber plug of the penicillin bottle and extends into the bottle body, and an opening of the liquid infusion channel at the position, close to the stressed blunt surface, of the needle rod is immersed in the liquid medicine;
s4, drawing the core rod of the injector outwards, and drawing the liquid medicine into the needle cylinder of the injector through an opening of the infusion channel at the position of the needle rod, which is close to the stress blunt surface;
and S5, pushing the syringe filled with the liquid medicine into an infusion bottle for infusing the liquid medicine to a patient.
The invention has the following beneficial effects:
through the selection of the size scope of the stress blunt surface and the arrangement vertical to the axis of the needle rod, the stress blunt surface can puncture the rubber plug of the liquid medicine bottle or the rubber plug of the penicillin bottle and extend into the bottle body, and the skin can not be punctured even if the stress blunt surface touches the skin by mistake in the process of extracting the liquid medicine in operation.
Drawings
FIG. 1 is a schematic perspective view of a prior art;
FIG. 2 is a schematic perspective view of the embodiment 1;
FIG. 3 is a schematic sectional view showing the structure of embodiment 1.
The reference numerals are illustrated below: 1. a needle bar; 2. a force-bearing blunt surface; 3. an infusion channel; 301. a transfusion section; 302. a liquid suction section; 4. a transition section; 5. a sleeving section; 6. and (7) installing a sleeve.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships conventionally placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
In a first aspect, a blunt needle of preventing stabbing for syringe of extraction liquid medicine, includes needle bar 1, thereby the top of needle bar 1 is equipped with the blunt face of atress 2 that is used for touching the rubber buffer of liquid medicine bottle openly and pokes the rubber buffer, the minimum area of the blunt face of atress 2 is 0.03141mm 2 The maximum area of the stress blunt surface 2 is 0.2827mm 2 The force-bearing blunt surface 2 completely seals the top end of the needle bar 1 and is arranged perpendicular to the axis of the needle bar 1. Its aim at, through the selection and use of the area size scope of the blunt surface of atress 2 and with the setting of 1 axis of needle bar vertical, make the blunt surface of atress 2 can puncture the rubber buffer of liquid medicine bottle or the rubber buffer of xiLin bottle and stretch into in the body, and even touch skin by mistake and also can't stab the skin in the operation liquid medicine extraction in-process.
Specifically, as shown in fig. 3, an infusion channel 3 for delivering the liquid medicine is arranged in the needle rod 1, and the infusion channel 3 includes an infusion section 301 arranged parallel to the axis of the needle rod 1 and a liquid suction section 302 with an outlet arranged on the side wall of the needle rod 1 and communicated with the infusion section 301. The infusion section 301 and the liquid suction section 302 are both linear, the liquid suction section 302 is perpendicular to the infusion section 301, and the infusion section 301 is arranged at the position close to the stress blunt surface 2. The purpose is to make the liquid medicine enter and exit the syringe of the injector through the needle rod 1 by arranging the transfusion channel 3.
Specifically, as shown in fig. 2, the force receiving blunt surface 2 is circular. Its aim at, through the design of the shape of the blunt surface 2 of atress, make the blunt surface 2 of atress concentrate more to the puncture power of rubber buffer, be convenient for puncture the rubber buffer of liquid medicine bottle.
Specifically, the minimum radius of the force-bearing blunt surface 2 is 0.1mm, and the maximum radius of the force-bearing blunt surface 2 is 0.3mm.
Specifically, as shown in fig. 3, the cross-sectional area of the needle bar 1 is larger than that of the force receiving blunt surface 2. The needle bar 1 is designed to be of a size, so that the needle bar 1 is prevented from being broken easily due to the fact that the needle bar 1 is too thin.
Specifically, as shown in fig. 3, a transition section 4 is disposed between the needle bar 1 and the force-receiving blunt surface 2, a cross-sectional area of the transition section 4 gradually decreases in a direction toward the force-receiving blunt surface 2, a minimum cross-sectional area of the transition section 4 is the same as an area of the force-receiving blunt surface 2, and a maximum cross-sectional area of the transition section 4 is the same as a cross-sectional area of the needle bar 1. Its aim at, through the design of gradual change section 4, make the blunt face 2 of atress top puncture the rubber buffer after, needle bar 1 can prop big puncture hole and enter into the medicine bottle through the puncture hole smoothly gradually.
Specifically, as shown in fig. 3, the outer contour of the sidewall of the transition section 4 is in a diagonal shape. The purpose is that through the design of the shape of the transition section 4, the transition section 4 can quickly open the puncture hole generated by puncturing the rubber plug by the top end of the stress blunt surface 2.
Specifically, as shown in fig. 3, the needle bar 1 has a cylindrical shape. The needle rod 1 is in a shape, so that resistance of a puncture hole generated by puncturing a rubber plug by the top end of the stress blunt surface 2 when the needle rod 1 enters the bottle body can be reduced.
Specifically, as shown in fig. 3, a sleeving section 5 is arranged at the tail end of the needle rod 1, the outer diameter of the sleeving section 5 is larger than that of the needle rod 1, and a mounting sleeve 6 for sleeving the injection needle on the top end of the injector is sleeved outside the sleeving section 5.
In a second aspect, a method for using a puncture-preventing blunt needle for a syringe for drawing medical fluid, applied to the above-mentioned puncture-preventing blunt needle for a syringe for drawing medical fluid, comprises the steps of:
step S1, mounting a blunt needle on an injector;
s2, vertically placing a blunt needle on the top surface of a rubber plug of the liquid medicine bottle or a rubber plug of a vial mouth of a penicillin bottle;
s3, puncturing the blunt needle towards the interior of the liquid medicine bottle or the penicillin bottle, so that the stressed blunt surface 2 punctures a rubber plug of the liquid medicine bottle or a rubber plug of the penicillin bottle and extends into the bottle body, and the liquid absorption section 302 is immersed into the liquid medicine at an opening of the needle rod 1 close to the stressed blunt surface 2;
s4, drawing a core rod of the injector outwards, and drawing the liquid medicine into a needle cylinder of the injector through an opening of the infusion channel 3 at the position of the needle rod 1 close to the stress blunt surface 2, sequentially through the liquid suction section 302 and the infusion section 301;
and S5, pushing the syringe filled with the liquid medicine into an infusion bottle for infusing the liquid medicine to a patient.
In any of the above steps, the operator does not prick the skin even if the force-receiving blunt surface 2 of the blunt needle accidentally touches the skin.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (10)
1. A blunt needle of preventing stabbing for a syringe for drawing a liquid medicine, comprising a cylindrical needle bar (1), characterized in that: the top end of the needle rod (1) is provided with a stress blunt surface (2) which is used for being in front contact with a rubber plug of the liquid medicine bottle to poke the rubber plug, and the stress blunt surface(2) Has a minimum area of 0.03141mm 2 The maximum area of the stress blunt surface (2) is 0.2827mm 2 The forced blunt surface (2) completely seals the top end of the needle bar (1) and is arranged perpendicular to the axis of the needle bar (1).
2. A puncture-proof blunt needle for a syringe for drawing liquid medicine according to claim 1, characterized in that: the infusion tube is characterized in that an infusion channel (3) for conveying liquid medicine is arranged in the needle rod (1), and the infusion channel (3) comprises an infusion section (301) arranged in parallel with the axis of the needle rod (1) and a liquid suction section (302) with an outlet arranged on the side wall of the needle rod (1) and communicated with the infusion section.
3. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 1, wherein: the stress blunt surface (2) is circular.
4. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 2, wherein: the minimum radius of the stress blunt surface (2) is 0.1mm, and the maximum radius of the stress blunt surface (2) is 0.3mm.
5. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 1, wherein: the cross section area of the needle rod (1) is larger than that of the stress blunt surface (2).
6. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 4, wherein: a transition section (4) is arranged between the needle rod (1) and the stress blunt surface (2), the cross sectional area of the transition section (4) is gradually reduced along the direction towards the stress blunt surface (2), the minimum cross sectional area of the transition section (4) is the same as the area of the stress blunt surface (2), and the maximum cross sectional area of the transition section (4) is the same as the cross sectional area of the needle rod (1).
7. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 6, wherein: the outer contour of the side wall of the gradual change section (4) is in a diagonal shape or an arc shape protruding outwards.
8. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 1, wherein: the needle rod (1) is cylindrical.
9. A blunt needle for preventing puncture of a syringe for drawing a medical liquid according to claim 8, wherein: the tail end of needle bar (1) is equipped with cup joints section (5), and the external diameter that cup joints section (5) is greater than the external diameter of needle bar (1), cup joints section (5) overcoat and is equipped with and is used for establishing syringe needle cover at installation cover (6) on the syringe top.
10. A method of using a puncture-resistant blunt needle for a syringe for drawing medical fluids, comprising: a puncture-preventing blunt needle to be applied to a syringe for drawing a medical fluid according to any one of claims 2 to 9, comprising the steps of:
step S1, mounting a blunt needle on an injector;
s2, vertically placing a blunt needle on the top surface of a rubber plug of the liquid medicine bottle or a rubber plug of a vial mouth of a penicillin bottle;
s3, puncturing the blunt needle towards the interior of the liquid medicine bottle or the penicillin bottle, so that the stressed blunt surface (2) punctures a rubber plug of the liquid medicine bottle or a rubber plug of the penicillin bottle and extends into the bottle body, and an opening of the liquid transfusion channel (3) at the position of the needle rod (1) close to the stressed blunt surface (2) is immersed in the liquid medicine;
s4, drawing a core rod of the injector outwards, and drawing the liquid medicine into a needle cylinder of the injector through an opening of the infusion channel (3) at the position of the needle rod (1) close to the stress blunt surface (2);
and S5, pushing the syringe filled with the liquid medicine into an infusion bottle for infusing the liquid medicine to a patient.
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| CN202310133732.7A CN115813761A (en) | 2023-02-20 | 2023-02-20 | Puncture-proof blunt needle of syringe for extracting liquid medicine and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310133732.7A CN115813761A (en) | 2023-02-20 | 2023-02-20 | Puncture-proof blunt needle of syringe for extracting liquid medicine and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116747141A (en) * | 2023-08-11 | 2023-09-15 | 四川大学华西医院 | Blunt needle capable of adjusting bending degree of blunt surface and application method thereof |
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Application publication date: 20230321 |