KR102274345B1 - Injector - Google Patents

Abstract

The present invention relates to a blood collection syringe comprising a needle unit (20), a syringe barrel (30) and a syringe plunger (40), and more particularly, a gas-liquid separation filter (45) on the plunger gasket (44) of the syringe plunger (40) ), it relates to a blood collection syringe capable of discharging gas from the inside of the syringe barrel 30 to the outside during blood collection.

Description

syringe {INJECTOR}

The present invention relates to a syringe having a stick injury prevention, reuse prevention, backflow prevention and preset function.

In general, disposable syringes used in hospitals and clinics are coupled with a cylindrical barrel having an injection solution discharge portion formed therein, and a plunger inserted therein so that it can be moved in the longitudinal direction of the barrel, and when the plunger is moved, it is in airtight contact with the barrel. As they move together, they provide a compressive force or a suction force. The needle body to which the injection needle is coupled from the outside is detachably coupled to the injection solution discharge unit, and the injection needle protection cover is detachably coupled to protect the injection needle in a completely wrapped state. However, such a conventional disposable syringe has a risk of introducing foreign substances into the body when inhaling the chemical solution in various ampoules, including glass ampoules, when used. Accordingly, in order to prevent such a risk, a filter or a filter-type syringe with a filter has been proposed.

The conventional filter-type syringe has a structure in which a filter having a filtering function is mounted in the hub of the filter-attached injection needle by separately providing a separate suction-only injection needle in the case of the filter-attached syringe. However, since the filter-type syringe according to the prior art has a structure in which a filter catching part and a filter fixture are additionally installed and fastened for assembling and fixing the filter mounted on the inside of the hub, the needle for exclusive use of inhalation is removed after inhaling the chemical solution. There was the inconvenience of having to reassemble the needle exclusively for intra-body injection. In addition, the filter-type syringe according to the prior art was inconvenient to have to maintain the respective disposal caps for the filtration needle for inhaling the drug and the needle for human use. It had considerable discomfort, such as the possibility of contact with body parts.

Figure 1a shows a cross-sectional view of a conventional filter-type syringe. In addition, Figure 1b shows an exploded cross-sectional view of a conventional filter-type syringe. In addition, as shown in FIGS. 1A and 1B, the outer cover 10, the inner filter housing 2 to which the filter 3 is mounted, and the injection needle 20 are sequentially combined and attached to the filter housing 2 It can be seen that a filter-type syringe capable of separating insoluble substances from a chemical solution through a filter is disclosed. However, such a conventional filter-type syringe has a problem with the risk of stick injury by the user being stabbed by the injection needle. Therefore, there is a demand for a syringe having a function of preventing puncture by an injection needle after use in such a syringe. In addition, although these syringes are disposable, there is a problem that there is no way to check whether or not to reuse them.

In addition, arterial blood gas analysis is a gas volume analysis method in arterial blood, and O2 and CO2 analysis is usually performed. In the past, the van Slyke device was used to measure the O2, CO2 content, and oxygen saturation in arterial blood, and at the same time the measured pH value was used to calculate the partial pressure using the Henderson-Hasselbalch equation. Po2, which is currently used, can be measured directly as Po2 using a Clark-type electrode based on the polarography principle, and pH can be directly measured using a pH induction electrode, and bicarbonate ion concentration with a computer inserted into the measuring device. By simultaneously calculating several numerical values such as digital display, (printed) output information (printout) was obtained.

Arterial blood for measurement is collected by using a syringe filled with heparin in the dead cavity, and several mL is collected from the upper arm, radial artery, and femoral artery. Measurements should be made as quickly as possible. When collecting, air bubbles should be excluded as soon as possible and stored in a refrigerator if measurements cannot be made immediately. As such, arterial blood gas analysis can be easily performed, and thus it is an essential test for pathogenesis in all diseases.

A conventional blood sampling syringe for analyzing arterial blood gas is configured to include a needle unit equipped with an injection needle, a barrel, and a plunger, like a conventional syringe. In addition, an anti-coagulant on one side of the top surface of the inside of the barrel may be provided to prevent coagulation of the collected blood. To collect blood from the human body for arterial blood gas analysis, the plunger is first moved to the uppermost position. However, it can be seen that gas remains inside the barrel head and inside the needle even when the plunger is moved to the uppermost side in the conventional blood collection syringe.

And, after the needle is drawn into the blood vessel, the plunger is moved downward to flow the blood into the barrel, but before the needle is drawn in, the gas remains in the head of the barrel, so bubbles are generated in the drawn blood. this will exist In addition, there is a problem in that the needle unit is detached and the stopper is mounted on the barrel head, in this process, blood in the barrel may leak, and the blood is exposed to outside air before mounting the stopper. , there is a risk of being stabbed at the tip of the needle in the process of detaching the needle unit.

Therefore, it is necessary to develop an improved blood sampling syringe for arterial blood gas analysis that can block the inflow of air bubbles during the blood collection process, maintain a completely sealed state without external exposure, prevent blood leakage during the blood collection process, and have a stick injury prevention function. do.

Republic of Korea Patent Publication No. 10-0758234 (2007.09.12.) Republic of Korea Patent Publication No. 10-1324555 (2013.11.11.) Republic of Korea Patent Publication No. 10-2014-0001800 (2014.01.07.) Republic of Korea Patent Publication No. 10-1354451 (2014.01.28.)

Therefore, the present invention has been devised to solve the conventional problems as described above, and according to an embodiment of the present invention, after completing injection of the injection solution, the needle and the injection needle unit are detached into the shield combined with the cover in a state in which the unit is located. and a tip protection member is positioned at the tip of the packing unit and needle on the shield head to completely prevent stick injury caused by the injection needle, and the marking fluid is stored in the packing unit, so the marking fluid is discharged during the use stage, making it easy to use An object of the present invention is to provide a syringe having a stick injury and a reuse prevention function that can be clearly identified and reused.

According to an embodiment of the present invention, in the blood collection syringe, by having the check valve unit, the inflow of air bubbles is blocked during the blood collection process, it is possible to maintain a completely sealed state without exposure to the outside, and it is possible to prevent blood leakage during the blood collection process. It is possible to improve the precision and accuracy of arterial blood gas analysis, and a gas-liquid separation filter is provided on the plunger gasket to allow a set amount of blood to be collected. In the state of detachment, the tip protection member is positioned at the end of the packing unit and the needle in the shield head, so stick injury caused by the injection needle can be completely prevented, and the marking fluid is stored in the packing unit and the marking fluid is discharged during the use stage An object of the present invention is to provide a blood collection syringe having a stick injury that can prevent reuse by easily checking whether it is used or not, and a preset function that can prevent reuse and leakage.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A first object of the present invention is, in a syringe, a barrel having a cylindrical body (barrel body), a barrel head (barrel head) formed in a shape protruding upward on the upper end of the body, and a barrel flange at the bottom of the body ( syringe barrel); Doedoe having a needle body provided with a needle mounting portion coupled to the injection needle at an upper end and a barrel mounting end detachably inserted to the outside of the barrel head at the lower end, an insertion groove is formed on the outside of the needle body, and the needle body a needle unit having a needle unit blade formed on the upper side of the; A plunger inserted into the barrel and moved by the user and providing suction or compression according to the direction of movement to introduce the chemical into the barrel or to discharge the chemical stored in the barrel through the injection needle ( syringe plunger); It is in the form of a tube and is inserted to the outside of the needle body and is moved up and down by the user and has a body that protects or projects the injection needle by positioning it inside according to the vertical movement direction, wherein the injection needle is the body of the body. When positioned inside, a lower engaging jaw inserted into the insertion groove is provided on the lower inner surface of the main body, and when the injection needle protrudes to the outside of the main body, the upper engaging jaw fitted to the needle unit wing is located on the upper inner surface of the main body. and a shield combined with a cover provided; It is located inside the upper end of the main body of the shield combined with the cover, the marking fluid is stored therein, and when the main body is moved in the direction in which the injection needle protrudes (upward direction), it is compressed by the needle mounting part and the stored marking fluid is discharged And it can be achieved by a syringe having a stick injury prevention and reuse prevention function, characterized in that it includes a packing unit through which the injection needle passes.

In the syringe having the stick injury prevention and reuse prevention function as described above, a protruding end is provided on the lower side of the lower engaging jaw on the inner surface of the main body of the shield combined with the cover, and the protruding end is the lower engaging jaw inside It protrudes more inward than the protruding length, and a tip protection member through which the injection needle is penetrated is located inside the shield combined with the cover. In the portable mode, the lower engaging jaw of the shield combined with the cover is positioned in a state inserted into the insertion groove to protect the injection needle, and in the use mode, the upper engaging jaw of the shield combined with the cover is on the needle unit wing. It is positioned in a fitted state so that the injection needle is exposed through the packing unit, and after use, in the safe mode, the user moves the cover and shield upward to the needle unit in a state where the needle unit is built-in inside the body. It may be characterized in that the unit is separated from the barrel. In addition, in the safe mode, the tip of the injection needle may be characterized in that it is located in the tip protection member.

A second object of the present invention is, in a syringe for collecting blood for arterial blood gas analysis, a cylindrical body (barrel body), a barrel head (barrel head) formed in a shape protruding upward from the top of the body, and the body a barrel (syringe barrel) provided with a lower barrel flange; Doedoe having a needle body provided with a needle mounting portion coupled to the injection needle at an upper end and a barrel mounting end detachably inserted to the outside of the barrel head at the lower end, an insertion groove is formed on the outside of the needle body, and the needle body a needle unit having a needle unit blade formed on the upper side of the; A plunger head (plunger head) inserted into the barrel and a gasket (plunger gasket) mounted on the plunger head are provided, and are moved by a user and provide suction or compression according to the direction of movement to inject the chemical into the barrel. a plunger (syringe plunger) for introducing into the interior or discharging the chemical solution stored in the barrel through the injection needle; a gas-liquid separation filter mounted on the gasket and configured to discharge gas from the inside of the barrel during blood collection; It is in the form of a tube and is inserted to the outside of the needle body, and is moved up and down by the user and has a body that protects or projects the injection needle by positioning it inside according to the vertical movement direction, wherein the needle When positioned inside, a lower engaging jaw inserted into the insertion groove is provided on the lower inner surface of the main body, and when the injection needle protrudes to the outside of the main body, the upper engaging jaw fitted to the needle unit wing is located on the upper inner surface of the main body. a shield with a cover provided; a check valve unit provided at the inner upper end of the barrel and through which the lower end of the injection needle is penetrated; It is located inside the upper end of the main body of the shield combined with the cover, the marking fluid is stored therein, and when the main body is moved in the direction in which the injection needle protrudes (upward direction), the marking fluid is compressed and stored by the needle mounting part and discharged And by including a packing unit through which the injection needle passes, the position of the plunger is adjusted to collect blood by a set amount, and when the injection needle is drawn into the blood vessel, the blood flows into the inside of the barrel, It can be achieved by a blood-collecting injector having a stick injury prevention and preset function, characterized in that the gas is discharged by the gas-liquid separation filter.

In the blood collection syringe as described above, a protruding end is provided on the lower side of the lower engaging jaw from the inner surface of the main body, and the protruding end protrudes more inward than the length at which the lower engaging jaw protrudes inward, and the cover A tip protection member through which the injection needle is penetrated is positioned inside the combined shield, and a gas exhaust passage for discharging gas from the gas-liquid separation filter to the outside is provided inside the gasket. In the portable mode, the lower engaging jaw is positioned in a state inserted into the insertion groove to protect the injection needle, and in the use mode, the upper engaging jaw is positioned to be inserted into the needle unit wing so that the injection needle is inserted into the packing It is exposed through the unit, and after use, in the safe mode, the user moves the cover and shield upward to separate the needle unit from the barrel while the needle unit is built in the body, the blood After being introduced and stored in the barrel, which is the lower side of the check valve unit, the needle unit is separated, and after the needle unit is separated, the leakage of blood stored in the barrel and the inflow of external gas are blocked. can do.

According to the syringe having a stick injury and reuse prevention function according to an embodiment of the present invention, after injection of the injection solution is completed, the needle and the injection needle unit are placed into the shield combined with the cover, and the needle and the injection needle unit are detached, and the packing unit and the shield head The tip protection member is positioned at the tip of the needle, so stick injury caused by the injection needle can be completely prevented, and the marking fluid is stored in the packing unit so that the marking fluid is discharged during the use stage to easily check whether it is used or not, preventing reuse have the effect that

According to the blood collection syringe having a preset function that can prevent stick injury, reuse prevention, and water leakage according to an embodiment of the present invention, by having a check valve unit, the inflow of air bubbles is blocked in the blood collection process and completely without external exposure It can maintain the airtight condition and prevent blood leakage during the blood collection process, so the precision and accuracy of arterial blood gas analysis can be improved. , The needle and the injection needle unit are placed and detached into the shield combined with the cover, and the packing unit and the tip protection member are positioned at the tip of the needle in the shield head, so that stick injury caused by the injection needle can be completely prevented, and packing Since the marking fluid is stored in the unit and the marking fluid is discharged during the use stage, it is possible to easily check whether it is used or not, thereby preventing reuse.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in those drawings It should not be construed as being limited.
1a is a cross-sectional view of a conventional syringe;
1b is an exploded cross-sectional view of a conventional syringe;
2 is a cross-sectional view of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a portable mode;
3 is a cross-sectional view of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a use mode;
4 is a cross-sectional view of a state in which the nutrient solution is sucked into the barrel through the backward movement of the plunger in FIG. 3;
5 is a cross-sectional view of a state in which the drug is injected after the needle is inserted into the blood vessel in FIG. 4;
6 is a cross-sectional view of a state in which the cover and shield is advanced after use and the needle is drawn into the shield;
7 is a cross-sectional view of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a safe mode;
8 is a cross-sectional view of a preset blood collection syringe having a stick injury prevention and backflow prevention function according to an embodiment of the present invention in a portable mode;
9 is a cross-sectional view of a preset blood collection syringe having a stick injury prevention and backflow prevention function according to an embodiment of the present invention in a setting mode;
10 is a cross-sectional view of a preset blood collection syringe having a stick injury prevention and backflow prevention function according to an embodiment of the present invention in a state during blood collection;
11 is a cross-sectional view of a preset blood collection syringe having a stick injury prevention and a backflow prevention function according to an embodiment of the present invention in a safe mode.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In this specification, when a component is referred to as being on another component, it may be directly formed on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components is exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. For example, the region shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a particular shape of the region of the device and not to limit the scope of the invention. In various embodiments of the present specification, terms such as first, second, etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprises' and/or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific contents have been prepared to more specifically describe the invention and help understanding. However, a reader having enough knowledge in this field to understand the present invention may recognize that it may be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known and not largely related to the invention are not described in order to avoid confusion without any reason in describing the present invention in describing the invention.

Hereinafter, a configuration, function, and operation method of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention will be described.

2 is a cross-sectional view showing a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a portable mode. And, Figure 3 shows a cross-sectional view of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a use mode. In addition, FIG. 4 is a cross-sectional view illustrating a state in which the nutrient solution is sucked into the barrel through the rearward movement of the plunger in FIG. 3 . And, FIG. 5 is a cross-sectional view showing a state in which the drug is injected after the needle is inserted into the blood vessel in FIG. 4 . 6 is a cross-sectional view showing a state in which the needle is drawn into the shield by advancing the shield combined with the cover after use. And, Figure 7 shows a cross-sectional view of a syringe having a stick injury prevention and reuse prevention function according to an embodiment of the present invention in a safe mode.

The syringe 100 having a stick injury prevention and reuse prevention function according to an embodiment of the present invention, as shown in FIGS. 2 to 6, the barrel 30, the plunger 40, the needle unit 20, It may be configured to include a shield combined with a cover 50 , a packing unit 70 , and the like.

The barrel 30 and plunger 40 are configured similarly to a conventional syringe. That is, as shown in FIG. 2 , the barrel 30 is provided with a cylinder-shaped barrel body 32 , and the barrel head 31 provided on the upper end of the barrel body 32 protrudes upward. is formed, and the barrel flange 33 is provided at the lower end of the barrel body 32 . In addition, the plunger 40 is inserted into the barrel body 32 of the barrel 30, and can be moved by a user while being inserted into the inside of the barrel 30 in this way, and depending on the direction of movement, suction force or By providing a compressive force, the drug solution is drawn into the inside of the barrel 30 or the drug solution stored in the barrel 30 is discharged through the injection needle 21 . The plunger 40 is provided with a rubber and polymer-based plunger gasket in contact with the inner surface of the barrel 30 in the mounting portion of the plunger head 41, and a plunger flange 43 is provided at the lower end, and the plunger head 41 ) and the plunger body 42 is provided between the plunger flange (43).

A syringe 100 having a stick injury prevention and reuse prevention function according to an embodiment of the present invention is a new cover combined shield 50, a needle unit 20, a packing unit 70, a tip protection member ( 26) consists of

The needle unit 20 according to an embodiment of the present invention, as shown in FIGS. 2 to 7, is provided with a needle mounting unit 23 coupled to the injection needle 21 at the upper end and the barrel head 31 at the lower end. It can be seen that the needle body 22 is provided with the barrel mounting end 25 inserted to the outside of the needle body 22, and the insertion groove 24 is formed on the outside of the needle body 22.

In addition, it is composed of a shield combined with a cover 50 according to an embodiment of the present invention, and as shown in FIGS. 2 to 7 , the needle body 22 is inserted outside and the lower end is opened so as to be moved up and down by the user. A tubular body 51 having a flange 55 formed at the lower end, an upper engaging protrusion 52 provided on the inner surface of the main body 51, and a lower engaging protrusion 53 provided on the lower inner surface of the main body 51 It can be seen that you have

In addition, the cover and shield 50, the protruding end 54 is further formed on the lower side of the lower engaging projection 53 formed on the inner surface of the main body 51. The protruding length of the protruding end 54 is configured to be larger than the protruding length inward of the lower engaging protrusion 53 .

Therefore, in the portable mode, the lower engaging jaw 53 of the cover and shield 50 is inserted into the insertion groove 24 of the needle body 22, and the injection needle ( Since 21) is located, it is possible to protect the injection needle 21. In addition, in the use mode, the cover and shield 50 is moved to the lower side so that the upper locking jaw 52 of the cover and shield 50 is inserted into the needle unit wing 27 formed on the upper side of the needle body 22. may be positioned to expose the injection needle 21 . And, in the safety mode after use, the needle unit 20 is fixed inside the cover and shield 50 with the lower clasp 53 of the cover and shield 50 inserted into the insertion groove 24, The user moves the cover and shield 50 upward to detach the needle unit 20 from the barrel 30 with the needle unit 20 built therein. The protruding end 54 serves to separate the needle unit 20 and the barrel 30 while preventing the needle unit 20 from falling out to the lower end of the shield 50 as a cover.

A packing unit 70 may be provided inside the head 56 of the shield combined with the cover 50 . The packing unit 70 is located on the inside of the head 56 of the upper body 51 of the cover and shield 50 and guides the injection needle 21 to protrude to the outside during use mode, and a storage unit inside (71) is formed. In addition, the marking fluid 73 is stored in the storage unit 71 , and a cutout 72 is provided between the storage unit 71 and the lower end of the packing unit 70 .

Therefore, when the packing unit 70 is compressed through the needle mounting part 23 of the needle unit 20 immediately after the use mode or use mode, the cutout 72 of the packing unit 70 is cut while the storage part 71 is cut. The marking fluid 73 stored in the cover is discharged to the inside of the shield 50 as a cover. Therefore, after use, the marking fluid 73 is discharged into the cover and shield 50 to check whether it is used or not, so that reuse of the syringe can be prevented. The marking fluid 73 may be composed of a variety of materials, such as colored ink, which can be used to check whether the marking fluid is used.

In addition, according to the embodiment of the present invention, the injection needle 21 is penetrated, it may be configured to include a tip protection member 26 located at the top in the shield combined cover (50). The tip protection member 26 is positioned between the needle mounting part 23 and the packing unit 70 in the use mode, as shown in FIGS. 3 to 6, and the cover and shield 50 in the safety mode. By moving upward and being positioned at the end of the injection needle 21 in a state in which the needle unit 20 is positioned therein, it is possible to more safely prevent stick injury.

Hereinafter, a method of using a syringe having the aforementioned stick injury prevention and reuse prevention function will be described.

First, as shown in Figure 2, in the portable mode, the lower engaging projection 53 of the shield combined with the cover 50 is positioned in a state inserted into the insertion groove 24 of the needle unit 20, the injection needle 21 will protect

And, if the user wants to switch to the use mode, as shown in FIG. 3, the user moves the cover and shield 50 to the lower side and places the needle unit wing 27 on the upper clasp 52 of the cover and shield 50. ) is placed in the inserted state. And it serves to fix the cover and shield 50 not to move to the bottom during injection.

Then, as shown in FIG. 4 , the exposed injection needle 21 is inserted into the liquid ampoule and the like, and the plunger 40 is moved to store the chemical liquid in the barrel 30 .

Then, as shown in FIG. 5 , the injection needle 21 is injected into the human body and the chemical solution in the barrel 30 is injected into the human body. At this time, the needle mounting portion 21 of the needle unit 20 presses the packing unit 70 , and the cutout 72 is cut by compression against the packing unit 70 , and the marking stored in the storage unit 71 . The fluid 73 is discharged into the cover and shield 50 . Accordingly, it is possible to check whether the syringe is used.

After use is complete, as shown in FIG. 6 , by moving the cover and shield 50 upwards, the lower engaging protrusion 53 of the cover and shield 50 is inserted into the insertion groove 24 of the needle body 22 . to be positioned so that the injection needle 21 is positioned within the shield combined with the cover 50 .

Then, by moving the cover and shield 50 further upward, insert the protruding end 54 of the cover and shield 50 into the insertion groove 24 to fix the needle unit 20 to the cover and shield 50. do.

Then, the user moves the cover and shield 50 to the upper side, and with the needle unit 20 embedded therein, the lower end of the needle unit 20 is caught on the protruding end 54 and detached from the barrel 30 for safety. mode will be switched. And at this time, since the tip protection member 26 is positioned at the end of the needle 21, it is possible to more safely prevent stick injury.

Therefore, after completion of use, it is possible to detach the injection needle 21 and the needle unit 20 in a state in which the injection needle 21 and the needle unit 20 are positioned within the cover and shield 50, thereby preventing stick injury caused by the injection needle 21, and marking Reuse can be prevented by discharging the fluid 73 .

Hereinafter, a configuration, function, and operation method of a preset blood collection syringe having stick injury prevention and backflow prevention functions according to an embodiment of the present invention will be described. First, FIG. 8 is a cross-sectional view of a preset blood collection syringe having stick injury prevention and backflow prevention functions according to an embodiment of the present invention in a portable mode. And Figure 9 shows a cross-sectional view of a preset blood collection syringe having a stick injury prevention and backflow prevention function according to an embodiment of the present invention in a setting mode. In addition, FIG. 10 is a cross-sectional view showing a preset blood collection syringe having functions of preventing stick injury and preventing backflow according to an embodiment of the present invention in a state of blood collection. And Figure 11 shows a cross-sectional view of a preset blood collection syringe having a stick injury prevention and backflow prevention function according to an embodiment of the present invention in a safe mode.

The preset blood collection syringe having stick injury prevention and backflow prevention functions according to an embodiment of the present invention basically includes the aforementioned configuration of a syringe having stick injury prevention and reuse prevention functions. That is, it has a function of preventing stick injury and preventing reuse, including the cover and shield 50, the packing unit 70, the needle unit 20, the tip protection member 26, the barrel 30, and the plunger 40. .

In addition to this, the preset blood collection syringe having stick injury prevention and backflow prevention functions according to an embodiment of the present invention has a backflow prevention function and a preset function.

A check valve unit 60 is provided in the barrel 30 of the preset blood collection syringe having stick injury prevention and backflow prevention functions according to an embodiment of the present invention.

8, the lower side of the injection needle 21 protrudes from the lower surface of the needle unit 20 to the lower side by a certain length, and the lower end of the protruding injection needle 21 is a check valve unit 60 will be inserted through

Therefore, in the body blood mode, the injection needle 21 is drawn into the blood vessel, and the blood drawn through the injection needle 21 is introduced into the lower barrel 30 of the check valve unit 60 . The check valve unit 60 is configured to be connected to the guy shown in the enlarged view of FIG. 8 , from the top to the inner surface of the barrel head 31 , and to the top surface of the barrel body 32 , and the top surface of the barrel body 32 . It can be seen that it is provided throughout. And the end surface of the mounted injection needle 21 is positioned on the same surface as the lower surface of the check valve unit (60).

Then, after the blood is introduced into and stored in the barrel 30, which is the lower side of the check valve unit 60, the needle unit 20 is detached through the above-mentioned cover and shield 50, and the needle unit 20 ) is removed, the check valve unit 60 blocks the leakage of blood stored in the barrel 30, and the sealing is maintained to block the inflow and exposure of external gas.

In addition, in the blood collection syringe for arterial blood gas analysis according to an embodiment of the present invention, an anticoagulant may be provided on at least one of one side of the lower end surface of the check valve unit 60 and one side of the inner surface of the barrel 30 .

And the blood collection syringe according to the embodiment of the present invention has a preset function. This preset function moves the plunger 40 to first set the amount of blood to be collected, and then injects the injection needle 21 of the set blood collection syringe into the blood vessel in a state in which the plunger does not automatically move. The gas inside is out and only blood is drawn into the inside of the barrel 30 .

This configuration is made possible by the gas-liquid separation filter 45 inside the plunger gasket 44 mounted on the plunger head 41 . As shown in FIG. 8 , it can be seen that the plunger gasket 44 is inserted and fixed through the mounting portion of the plunger head 41 . A mounting groove 46 in which the plunger head 41 is mounted is formed in the plunger gasket 44 , and a gas-liquid separation filter 45 is mounted at an upper end of the plunger gasket 44 . In addition, an internal space and a gas discharge passage are provided in the lower end of the gas-liquid separation filter 45 and the gasket 44 so that only the gas in the barrel 30 can be discharged to the outside. Therefore, when the injection needle 21 of the blood collection syringe is injected into the blood vessel, blood flows into the barrel 30 without moving the plunger 40 , and the gas in the barrel 30 moves through the gas-liquid separation filter 45 and the gas discharge path. is discharged to the outside.

Hereinafter, a method of using the preset blood collection syringe having functions of preventing stick injury and preventing backflow according to an embodiment of the present invention will be described.

First, after determining the amount of blood to be collected, as shown in FIG. 9 , the plunger 30 is moved to the rear to set the syringe. And by moving the cover and shield 50 to the lower end, the injection needle 21 is exposed to the outside.

And, when the injection needle 21 is injected into the blood vessel, as shown in FIG. 10 , the gas in the barrel 30 is discharged to the outside through the gas-liquid separation filter 45 while the plunger 40 is not moved. It can be seen that blood is introduced into the barrel 30 .

When all the gases in the barrel 30 are exhausted and only blood exists in the barrel 30 at the same time, blood collection is completed. When the blood collection is complete, the injection needle 21 is detached from the blood vessel and the shield combined with a cover 50 is moved upward. Move the needle unit 20 so that it is located in the shield combined with the cover (50).

And as shown in FIG. 11, by moving the cover and shield 50 further upward, the needle unit 20 is positioned in the cover and shield 50, and the needle unit 20 is separated from the barrel 30. make it possible In addition, even in a state in which the needle unit 20 is detached by the check valve unit 60 , blood does not leak to the outside without a separate stopper attached, and at the same time, the needle unit 20 is detached by the check valve unit 60 . No contact with external air, gas and blood.

Therefore, as shown in FIGS. 8 to 11, blood is not exposed to external gases and does not leak during the entire blood collection process, so bubbles do not remain, thereby improving the precision and accuracy of arterial blood gas analysis.

In the apparatus and method described above, the configuration and method of the above-described embodiments are not limitedly applicable, but the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made. have.

2: filter housing 3: filter
10: cover 20: needle unit
21: injection needle 22: needle body
23: needle mounting portion 24: insertion groove
25: barrel mounting end 26: tip protection member
27: needle unit wing 30: barrel
31: barrel head 32: barrel body
33: barrel flange 40: plunger
41: plunger head 42: plunger body
43: plunger flange 44: plunger gasket
45: gas-liquid separation filter 50: shield combined cover
51: body 52: upper jaw
53: lower engaging jaw 54: protruding end
60: check valve unit 70: packing unit
71: storage unit 72: cutout
100: syringe with stick injury prevention and reuse prevention function

Claims (6)

a needle unit 20 having an injection needle 21 at the top;
a syringe barrel 30 having a barrel head 31 to which the needle unit 20 is detachably coupled and a barrel body 32 having the barrel head 31 formed at an upper end;
a syringe plunger (40) having a plunger head (41) inserted into the syringe barrel (30) and having a plunger gasket (44) mounted to the plunger head (41);
The main body 51 which is in the form of a tube and is inserted to the outside of the needle unit 20 and moves up and down by the user and protects or projects the injection needle 21 by positioning the injection needle 21 inside according to the vertical movement direction. a shield with a cover and a combined shield (50);
It is located inside the upper end of the main body 51, the marking fluid 73 is stored therein, and when the main body 51 is moved in a direction to protrude the injection needle 21 for drug injection, the needle unit 20 Containing a packing unit 70 for discharging the marking fluid 73 compressed by the upper end of the
A syringe with anti-stick injury and re-use protection. a needle unit 20 having an injection needle 21 at the top;
a syringe barrel 30 having a barrel head 31 to which the needle unit 20 is detachably coupled and a barrel body 32 having the barrel head 31 formed at an upper end;
a syringe plunger (40) having a plunger head (41) inserted into the syringe barrel (30) and having a plunger gasket (44) mounted to the plunger head (41);
The main body 51 which is in the form of a tube and is inserted to the outside of the needle unit 20 and moves up and down by the user and protects or projects the injection needle 21 by positioning the injection needle 21 inside according to the vertical movement direction. a shield with a combined cover (50) and;
It is located inside the upper end of the main body 51, the marking fluid 73 is stored therein, and when the main body 51 is moved in the direction in which the injection needle 21 protrudes for blood collection, the needle unit 20 of Containing a packing unit 70 for discharging the marking fluid 73 compressed by the upper end,
blood draw syringe. 3. The method according to claim 2,
The needle unit 20 is provided with a needle mounting portion 23 to which the injection needle 21 is coupled to the upper end,
The packing unit 70 is compressed by the needle mounting portion 23 when the main body 51 is moved in the direction in which the injection needle 21 protrudes,
blood draw syringe. 4. The method according to claim 2 or 3,
Further comprising a gas-liquid separation filter (45) mounted on the plunger gasket (44) and discharging gas from the inside of the syringe barrel (30) during blood collection,
blood draw syringe. delete 4. The method according to claim 2 or 3,
A storage unit 71 in which the marking fluid 73 is stored is formed inside the packing unit 70,
Between the storage unit 71 and the lower end of the packing unit 70, a cutout 72 that is cut when the packing unit 70 is compressed is provided,
The stored marking fluid 73 is discharged when the cutout 72 is cut,
blood draw syringe.

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