CN114602002A - Safety type indwelling needle with blood return overflow preventing and needle-prick injury preventing device - Google Patents
Safety type indwelling needle with blood return overflow preventing and needle-prick injury preventing device Download PDFInfo
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- CN114602002A CN114602002A CN202210243566.1A CN202210243566A CN114602002A CN 114602002 A CN114602002 A CN 114602002A CN 202210243566 A CN202210243566 A CN 202210243566A CN 114602002 A CN114602002 A CN 114602002A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1583—Needle extractors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1585—Needle inserters
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- Vascular Medicine (AREA)
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- General Health & Medical Sciences (AREA)
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
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Abstract
The invention provides a safe indwelling needle with a device for preventing blood return overflow and needle stick injury, which comprises the following unique technical definitions: the device kit with the functions of independently preventing blood return overflow and independently preventing needle stick injury integrates an integrated structure technology, and an integrated mode and an integrated structure are unique technical cores. The blood return overflow prevention device kit in the integrated structure is a kit for placing a one-way valve in a catheter seat; the needle-prick prevention device in an integrated structure is a kit for installing a spring clip in a steel needle assembly. The two current universal device external members with the functions of preventing blood return from overflowing and preventing needle stick injuries are integrated into a whole, and are the prominent technical key points of the patent; the safety indwelling needle integrated with the double-prevention device is constructed after integration, and is the outstanding technical advantage of the patent.
Description
Technical Field
The invention relates to the technical field of medical infusion, in particular to a safe indwelling needle with a device for preventing blood return overflow and needle stick injury.
Background
Indwelling needles include soft catheters/cannulas that can be indwelling within a blood vessel, and stainless steel puncture guiding needles. When the puncture needle is used, the steel needle is punctured to guide the catheter into the blood vessel, and after the puncture is completed, the steel needle is withdrawn to keep the catheter in the blood vessel, so that the infusion treatment is performed. The use of the indwelling needle can reduce the pain of the patient caused by repeated venipuncture, is convenient for clinical medication, in particular to rescue medication of critical and serious patients, and can simultaneously reduce the workload of nurses and reduce the puncture pain of the patient.
The use of traditional indwelling needles faces two major challenges: the blood return overflow is easy to occur, the health of the patient is threatened, and the peripheral environment is easy to cause hematogenous pollution; the medical care personnel are easy to be stabbed after the steel needle is pulled out, so that cross infection is caused. To solve the above two problems, many international manufacturers produce indwelling needles with a blood return and overflow preventing device or an indwelling needle with a needle-point puncture preventing device.
However, most products have only passive safety indwelling needles with single-function blood-return-overflow prevention devices or only passive safety indwelling needles with single-function needle-tip puncture prevention devices. Meanwhile, the safety indwelling needle with the double-function device for preventing blood return overflow and preventing needle point puncture only has a spring retraction needle head and an active safety indwelling needle at present, and the active safety indwelling needle is not suitable for long needles, so that the length of a needle gauge is limited. Furthermore, for some countries, the safety of indwelling needles has become a prerequisite for market entry. Therefore, how to develop a new safety type indwelling needle for addressing the above problems is of great significance.
Disclosure of Invention
The invention aims to provide a safe indwelling needle with a device for preventing blood return from overflowing and preventing needle stick injuries, which overcomes the defects in the prior art.
In order to achieve the above object, the present invention provides a safety type indwelling needle with a blood return overflow preventing and needle stick injury preventing means, comprising: a catheter assembly, a spring assembly, a needle hub assembly;
the catheter component is internally provided with a one-way valve plate and a one-way valve core for preventing the backflow blood from overflowing;
one end of the catheter component is elastically locked with the locking groove and the locking boss, so that the catheter component and the needle seat component are connected together;
the shrapnel component comprises a shrapnel for preventing needle-prick injury;
the elastic sheet is provided with an elastic lock catch, the inner side wall of the Ruhr hole of the catheter component is correspondingly provided with a lock catch hole or a lock catch groove, and the elastic sheet component is elastically locked with the lock catch hole or the lock catch groove through the elastic lock catch so as to be connected with the catheter component.
As an improvement of the safety type indwelling needle with the blood return overflow preventing and needle stick injury preventing device of the present invention, the catheter assembly further comprises: a catheter and a catheter hub;
the guide pipe seat is internally provided with the check valve plate and the check valve core, the guide pipe is arranged in an inner hole of the guide pipe seat, and the lock catch hole or the lock catch groove is formed on the wall of the Ruhr hole of the guide pipe seat;
the shell fragment subassembly still includes the shell fragment seat, the shell fragment is located in the shell fragment seat, the needle file subassembly includes steel needle, needle file, tail cap, the embedded functional ventilated membrane of tail cap, the rear end of needle file with the tail cap is pegged graft, the rear end of steel needle passes through the needle file is connected, and the front end of steel needle passes in proper order the back diaphragm orifice, the middle section hole of shell fragment, just the steel needle is dialled open the front end shielding part of shell fragment makes its elasticity overlap and press on the needle wall of steel needle, the steel needle extends behind the shell fragment seat, pass pipe seat, check valve core, check valve block stretch out to the pipe front end.
As an improvement of the safety type indwelling needle with the blood return overflow prevention and needle puncture injury prevention device, the elastic lock catch is an outward bending structure formed at the front part of the elastic sheet and is locked in the lock catch hole or the lock catch groove under the action of the steel needle.
As the improvement of the safety type indwelling needle with the blood return overflow prevention and needle puncture wound prevention device, the front end shielding part is integrally formed at the front end of the elastic lock catch, and the elastic lock catch is elastically lapped on the needle wall of the steel needle so as to enable the elastic lock catch to arch into the lock catch hole on the wall of the luer hole of the catheter seat; or the elastic lock catch is arched into a lock catch groove on the wall of the luer hole of the catheter base, so that the elastic sheet assembly and the catheter assembly are connected into a whole.
As an improvement of the safety indwelling needle with the blood return overflow prevention and needle stick injury prevention device, the outer wall of the catheter seat is provided with a guide groove corresponding to the guide arm, the front part of the guide groove is provided with a lock catch boss, the front end of the needle seat is provided with the guide arm corresponding to the guide groove, and the front end of any guide arm is provided with a lock catch groove corresponding to the lock catch boss.
As an improvement of the safety type indwelling needle with the blood return overflow prevention and needle puncture injury prevention device, the number of the guide arms is two, the two guide arms are circumferentially and symmetrically distributed at the front end of the needle base, and the lock catch groove at the front end of each guide arm is elastically locked with the lock catch boss on the guide groove on the outer wall of the catheter base, so that the catheter component and the needle base component can be tightly attached together, the looseness is reduced, and the catheter component is prevented from falling off.
As an improvement of the safety indwelling needle with the blood return overflow prevention and needle stick injury prevention device, based on the structure of the elastic lock catch, the operation method of the safety indwelling needle comprises the following steps:
in the puncture process, when the catheter is pushed to go deep into the blood vessel, the pushing force enables the catheter seat, the lock catch boss on the guide groove and the lock catch groove at the front end of the guide arm of the needle seat to be separated and unlocked, when the needle seat assembly is withdrawn, the steel needle is withdrawn from the one-way valve block in the catheter seat, the lip of the plastic valve block is closed to prevent the return blood from overflowing and continue to withdraw the needle seat assembly, when the steel needle slides over the front shielding part of the elastic sheet, the front shielding part loses the support of the needle tube wall to make the elastic lock catch, under the action of resilience force, the catheter base leaves the lock catch hole of the catheter base and is unlocked with the wall of the lock catch hole, or the elastic lock catch leaves the lock catch groove of the catheter base under the action of resilience force and is unlocked with the groove wall, at the moment, the shielding part at the front end of the elastic sheet shields the steel needle tip, when the needle seat assembly is continuously withdrawn, the flat limit point of the steel needle tube is blocked by the back plate hole, so that the elastic sheet assembly is pulled out of the catheter seat along with the needle seat assembly.
As an improvement of the safety type indwelling needle with the device for preventing the blood return from overflowing and the needle stick injury, the safety type indwelling needle is characterized in that the guide arm and the guide groove are arranged so that:
the push catheter assembly slides forwards by taking the needle seat guide arm as a track, so that the catheter can be pushed more conveniently in clinical operation and stretches into a blood vessel, and the phenomenon that the steel needle is pressed, bends downwards to stab the blood vessel or scratch the catheter can be avoided.
As an improvement of the safety type indwelling needle with the blood return overflow prevention and needle stick injury prevention device, a thread section is arranged at the rear end part of the catheter seat and is clamped between bosses above the needle seat to prevent the catheter seat from rotating.
As an improvement of the safety type indwelling needle with the blood return overflow prevention and needle puncture injury prevention device, one or more steel needle side holes are processed at the position of the steel needle close to one end of the needle point, so that blood return can be seen, the catheter seat is a transparent part, and a first visible blood return window is arranged at the front end corresponding to the one-way valve plate; the needle base is a transparent piece, the needle base handle is provided with a second blood return window of the needle base, the outer side of the catheter base is provided with a butterfly wing, and the butterfly wing is provided with a binding and hanging hole.
The working principle of the safe indwelling needle with the blood return overflow preventing and needle stick injury preventing device is as follows:
when a traditional open type indwelling needle finishes puncturing and drawing out a steel needle, blood overflows outwards through a catheter seat due to pressure, so that hematogenous pollution is easily caused, in order to control and reduce the blood overflow, an operator has to grasp the time, on one hand, the operator presses a puncture vein point, on the other hand, the operator needs to connect an infusion connector as soon as possible, so that the medical care personnel feel urgent psychological pressure, and in addition, in the urgent operation, the risk of needle point puncture injury is also brought to the medical care personnel.
The invention relates to a passive safety type indwelling needle with a blood return overflow preventing device and a needle stick injury preventing device, which is designed for solving two defects of the traditional open type indwelling needle.
The invention relates to a passive safety type indwelling needle with a device for preventing blood return overflow and needle stick injury, which integrates a kit with two functional devices of preventing blood return overflow and preventing needle stick injury independently into a whole structure, wherein the kit of the device for preventing blood return overflow in the integrated structure is a kit (check valve) for arranging a one-way valve in a catheter seat; the kit of the needle stick injury prevention device in the integrated structure is a spring clip kit (spring clip) arranged in the steel needle assembly. The two types of currently universal device external members with the functions of preventing blood return from overflowing and preventing needle stick injuries are integrated into a whole, so that the passive safety type indwelling needle with the double-prevention functional device is created.
The external member of the blood return overflow prevention device is a one-way valve which is arranged in a catheter seat and consists of a valve core and a plastic valve block, in an integrated component assembly, a steel needle penetrates through a lip of the plastic valve block, when the steel needle is drawn out, the lip of the plastic valve block rebounds and closes to block the return blood at the front end of the catheter seat, the port of the catheter seat has no return blood overflow, and the medical staff can be left with composition time to be connected with an infusion part connector.
A kit of a needle-prick prevention device is characterized in that in an integrated component assembly, a shielding part at the front end of a spring plate is elastically pressed on a needle wall to enable the locking part to arch into a locking hole on the wall of a catheter seat luer hole and lock with the wall of the locking hole, or enable the locking part to arch into a locking groove on the wall of the catheter seat luer hole and lock with the wall of the groove, when a steel needle is drawn out, the shielding part loses the support of the needle tube wall when the steel needle slides over the shielding part at the front end of the spring plate to enable the locking part at the front end of the spring plate to leave the locking hole on the wall of the catheter seat luer hole and unlock with the wall of the locking luer hole under the action of resilience force, or the locking part at the front end of the spring plate leaves the locking groove on the catheter seat under the action of the resilience force and unlocks with the wall of the groove, at the moment, the shielding part at the front end of the spring plate shields the tip of the steel needle, when the needle seat assembly is continuously drawn back, the flat limiting part of the steel needle tube is blocked by a back plate hole, the elastic sheet component is pulled out of the catheter seat along with the needle seat component, and the needle head shielded by the elastic sheet can eliminate the risk of stabbing medical staff.
The invention relates to a passive safety indwelling needle with a device for preventing blood return overflow and puncture wound, in an integrated component assembly, a guide technical structure for connecting a catheter seat and a needle seat slides forwards along a needle seat guide arm as a track by using a guide groove on the catheter seat, and the safety significance of the passive safety indwelling needle is that the catheter is more conveniently pushed to extend into a blood vessel in clinical operation, and the pressure of a steel needle can be avoided, and the steel needle can be prevented from bending downwards to puncture the blood vessel or scratch the catheter.
The needle seat of the passive safety indwelling needle with the blood return overflow preventing and needle puncture injury preventing device is flat, the two sides of the needle seat are provided with the symmetrical holding and pinching curved surfaces and the front end boss, and the design structures of the two holding and pinching curved surfaces and the two bosses are important force application points for clinical operation. When the needle is held and inserted, the thumb and the middle finger respectively pinch the holding curved surfaces at the two sides of the needle base, the middle finger hook pulls the boss of the catheter base, and the three-dimensional force can enable the catheter base to be tightly attached to the needle base, so that the puncture is more accurate and the user can feel comfortable. When the push catheter goes deep into the blood vessel, the boss of the middle push catheter base slides forwards to a proper position; when the steel needle is drawn out, the middle finger hooks the boss at the front end of the catheter base, so that the needle drawing action is more stable and reliable.
Compared with the prior art, the invention has the following advantages:
(1) the catheter component or/and the elastic sheet component or/and the needle seat component are integrated into a whole, so that the functional integration of preventing the backflow blood from overflowing and preventing the needle stick from being injured is realized;
(2) the safety type indwelling needle related by the invention is integrated through an elastic locking technology, separation or drawing of different components can be realized through push-pull action, the connection mode is simple, and the operation is convenient;
(3) the safe indwelling needle seat assembly has reasonable design of appearance structure, accords with humanized design, is convenient for the single-hand operation habit of medical personnel, lightens the working strength of the medical personnel, improves the operation precision of the medical personnel and further improves the service satisfaction of patients;
(4) the safe indwelling needle related by the invention can improve the assembly efficiency and the assembly power by limiting the thread section and positioning the anti-rotation boss in the process of integration and combination;
(5) the safety indwelling needle related by the invention can ensure that the thin steel needle cannot be declined or bent in use by arranging the guide structure, so that the blood vessel is prevented from being punctured;
(6) the safe indwelling needle has the advantages of simple structure and low cost, and the technical advantages of the items (1) to (5) are met, so that the safe indwelling needle is favorable for vigorous popularization.
Drawings
The embodiments are further described with reference to the accompanying drawings, in which:
FIG. 1 is a view showing the structure of a catheter assembly for preventing an extravasation of blood into an indwelling needle according to the present invention;
FIG. 2 is an overall structure view of the anti-needle-stick shrapnel component and the needle seat component of the indwelling needle according to the present invention;
FIG. 3 is the overall structure of the integrated dual-function indwelling needle according to the present invention;
FIG. 4 is a sectional view of the safety indwelling needle with the functions of preventing blood from overflowing and preventing needle stick injury according to the present invention;
FIG. 5a shows the indwelling needle with the needle tip of the steel needle unshielded by the spring plate;
FIG. 5b shows the state of the elastic sheet shielding the needle tip of the steel needle in the indwelling needle according to the present invention;
fig. 6 is an assembled sectional view of the elastic piece and the arc-shaped engaging groove in embodiment 3.
FIG. 7a is a schematic view showing the state that the plastic valve plate lip is closed and the blood return is blocked at the front end of the needle seat valve plate after the steel needle is drawn out, wherein the gray filling is not gray level but represents blood;
fig. 7b is a diagram showing the state that in clinic, the medical staff connects the infusion connector by screwing and pushes the valve core to open the plastic valve port to construct the liquid medicine channel, wherein the gray filling is not gray, but represents blood.
The specific structure corresponding to the numbering in the figure is as follows:
a catheter 101;
the guide tube seat 102, the butterfly wings 1021, the thread sections 1022, the guide grooves 1023, the locking bosses 1024, the locking holes 1025 and the locking grooves 1026;
a check valve plate 103;
a one-way valve spool 104;
a first blood return window 105;
a metal wedge 106;
a push-off table 107;
a clip base 201;
the elastic sheet 202, the elastic latch 2021, the front end shielding part 2022, the rear plate hole 2023 and the middle section hole 2024;
the needle base 301 comprises a holding curved surface 3011, a boss 3012 above the needle base, an anti-rotation boss 3013, a guide arm 3014 and a lock catch groove 3015;
a tail cap 302;
a functional breathable film 303;
a steel needle 304, a steel needle side hole 3041 and a steel needle flattening limit part 3042;
a second flashback window 305.
Detailed Description
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
The passive safety indwelling needle with the blood return overflow prevention and needle stick injury prevention device comprises a catheter component, a spring piece component and a needle seat component, wherein the three components are integrated units and are connected through an elastic lock catch and a guiding technology to form an integrated component assembly.
The catheter assembly contains an anti-extravasation of blood return kit. Specifically, the pipe assembly comprises a pipe 101, a pipe seat 102, a check valve plate 103 and a check valve core 104, the check valve plate 103 and the check valve core 104 are arranged in the pipe seat 102, and the pipe 101 is installed in an inner hole of the pipe seat 102.
The shrapnel component contains a needle-prick prevention external member. Specifically, the spring plate assembly comprises a spring plate seat 201 and a spring plate 202, and the spring plate 202 is located in the spring plate seat 201.
The needle stand assembly comprises a needle stand 301, a tail cap 302, a functional breathable film 303 and a steel needle 304, wherein the rear end of the needle stand 301 is connected with the tail cap 302, the functional breathable film 303 is embedded in an inner hole of the tail cap 302 in an encapsulating manner, one end of the steel needle 304 fixed with the needle stand 301 extends into the inner hole of the needle stand 301, and the catheter assembly, the elastic sheet assembly and the needle stand assembly are assembled in an integrated manner: the steel needle 304 sequentially passes through the rear plate hole 2023, the middle section hole 2024 and the poked front end shielding part 2022 of the elastic sheet, so that the steel needle is elastically lapped on the needle wall, at the moment, the elastic latch 2021 is arched into the latch hole 1025 on the luer hole wall of the catheter base 102 and locked with the latch hole wall, or the elastic latch 2021 is arched into the latch groove 1026 on the luer hole wall of the catheter base and locked with the groove wall, thereby realizing that the catheter assembly and the elastic sheet assembly are connected into a whole by an elastic latch technical structure, as shown in connection of 2021 and 1025 in fig. 4 and/or 2021 and 1026 in fig. 6 by the elastic latch technical structure.
The elastic locking connection of the catheter assembly and the needle seat assembly is that the guide arm 3014 at the front end of the needle seat is inserted into the guide groove 1023 on the outer wall of the catheter seat 102, and the locking groove 3015 at the front end of the guide arm 3014 elastically embraces the locking boss 1024 in the guide groove, so that the catheter assembly and the needle seat assembly are realized.
Specific embodiment example 1:
in the above safety type indwelling needle with the functions of preventing the backflow blood from overflowing and preventing the needle from being injured by the needle, the elastic sheet component is connected with the catheter component through the integrated component, and the integrated component comprises a connecting structure.
The integrated assembly adopts a lock catch connection mode, the integrated assembly comprises a lock catch body processed on the conduit assembly, an elastic lock catch is processed on the wall of a conduit seat 102 in the conduit assembly, correspondingly, a hole 2011 for the outward arching and protruding of the front end bending part of the elastic sheet 202 is processed on the wall of the elastic sheet seat 201, the lock catch part of the elastic sheet is connected with the lock catch of the front end bending part of the elastic sheet 202 arching and protruding out of the elastic sheet seat 201, and then the conduit assembly is connected with the elastic sheet assembly.
Optionally, the resilient latch is specifically processed in a latch hole 1025 on the wall of the conduit seat 102, and when the conduit assembly and the spring assembly are assembled: the locking part at the front end of the spring plate 202 extends out of the locking hole 1025 and is locked with the edge of the locking hole 1025.
Optionally, the elastic lock is specifically an arc-shaped slot disposed on the inner wall of the catheter hub 102, and the catheter assembly, the spring assembly and the needle hub assembly are assembled together: the bent portion at the front end of the spring plate 202 protrudes out of the hole 2011 of the wall of the spring plate seat 201 and then is matched with the locking slot 1026 (as shown in fig. 6 in the specification).
The specific structure of the spring plate locking part can be selected according to actual conditions and requirements.
Specific embodiment example 2:
in the safety indwelling needle with the functions of preventing the backflow blood from overflowing and preventing the needle stick from being injured, the needle seat assembly is connected with the catheter assembly through the integrated assembly, and the integrated assembly comprises a connecting structure.
Wherein the integrated assembly comprises two locking bosses 1024 arranged on the outer wall of the catheter hub 102 and two locking grooves arranged at the end of the needle hub 301.
Specific embodiment example 3:
on the basis of embodiment 2, the integrated assembly further includes a guiding structure, the guiding structure includes two guiding arms 3014 arranged at the end portions of the needle seat 301 and a locking boss 1024 arranged on the outer wall of the catheter seat 102, the locking boss 1024 is located at the front end position of the guiding groove 1023, and in the pushing and pulling process, the guiding arms 3014 slide along the corresponding two guiding grooves 1023 in a guiding manner, so that the guiding, pushing and pulling locking actions of the catheter seat 102 and the needle seat 301 are completed.
The number of the locking convex blocks, the locking grooves, the cantilevers and the guide ribs can be adjusted at will according to actual needs, and the number is only used for describing the structure in more detail and is not limited to the number of the structures. The locking lug, the locking groove and the cantilever can be 3 or 4 or 5 or 6 or more in equal angle arrangement.
Specific embodiment example 4:
according to the combined use of a plurality of integrated assembly structures in specific embodiment 4 and specific embodiment 5, the integrated assembly of the catheter assembly, the spring plate assembly and the needle seat assembly is realized.
Furthermore, a guide structure in the embodiment 6 can be additionally arranged, so that the guide structure of the catheter assembly, the elastic sheet assembly and the needle seat assembly which are integrated integrally and are separated in a push-pull way is realized.
Specific embodiment example 5:
on the basis of the specific implementation examples 1-4, the remaining needle can also select one or more of the following preferred schemes:
first, the front end of the one-way valve plate 103 corresponding to the outer wall of the catheter holder 102 is provided with a first blood return window 105.
Secondly, a transparent second blood return window 305 is correspondingly arranged on the outer wall of the needle seat 301 at the position of the central hole of the needle seat 301.
Thirdly, one or more steel needle side holes 3041 are processed at the position of the steel needle 304 near the needle tip, blood can not be observed when entering the steel needle 304, and blood can be observed at any time when entering the gap between the steel needle 304 and the catheter 101 along with the steel needle side holes 3041. The steel needle 304 also has a steel needle tubing flat restriction point 3042 that is such that: after unlocking, as the needle hub assembly continues to be withdrawn, the flat restraining point 3042 of the steel needle is blocked by the rear plate hole 2023, thereby pulling the clip assembly out of the catheter hub 102 along with the needle hub assembly.
Fourthly, a butterfly wing 1021 is arranged on the outer side of the conduit seat 102, and a hanging hole is processed in the butterfly wing 1021.
And fifthly, the catheter assembly further comprises a metal wedge 106, wherein the metal wedge 106 is positioned between the end of the catheter 101 and the inner hole of the catheter seat 102 and is used for better fixing the catheter 101 and the catheter seat 102.
Sixthly, the needle seat 301 is flat, two sides of the needle seat 301 are provided with symmetrical holding curved surfaces 3011, the end part of the catheter seat 102 is provided with a pushing platform 107, the holding curved surfaces 3011 on the two sides are respectively held by a thumb and a middle finger, and the index finger is used for pushing the pushing platform 107 to separate the needle seat 301 from the catheter seat 102.
Seventh, a boss 3012 above the needle seat is arranged at the end of the needle seat 301, a threaded section 1022 is arranged at the end of the catheter seat 102, and when the catheter assembly and the needle seat assembly are assembled together: threaded section 1022 can block in the clearance between needle file 301, spacing boss 3013, prevent that catheter hub 102 from rotating, guarantee medical personnel's success rate of venipuncture operation finally.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. The utility model provides a needle is kept somewhere to safe type with prevent blood return excessive and prevent that acupuncture from hindering device which characterized in that: the method comprises the following steps: a catheter assembly, a spring assembly, a needle hub assembly;
the catheter component is internally provided with a one-way valve plate and a one-way valve core for preventing the backflow blood from overflowing;
one end of the catheter component is elastically locked with the locking groove and the locking boss, so that the catheter component and the needle seat component are connected together;
the shrapnel component comprises a shrapnel for preventing needle-prick injury;
the elastic sheet is provided with an elastic lock catch, the inner side wall of the Ruhr hole of the catheter component is correspondingly provided with a lock catch hole or a lock catch groove, and the elastic sheet component is elastically locked with the lock catch hole or the lock catch groove through the elastic lock catch so as to be connected with the catheter component.
2. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury as claimed in claim 1, wherein: the catheter assembly further comprises: a catheter and a catheter hub;
the guide pipe seat is internally provided with the check valve plate and the check valve core, the guide pipe is arranged in an inner hole of the guide pipe seat, and the lock catch hole or the lock catch groove is formed on the wall of the Ruhr hole of the guide pipe seat;
the shell fragment subassembly still includes the shell fragment seat, the shell fragment is located in the shell fragment seat, the needle file subassembly includes steel needle, needle file, tail cap, the embedded functional ventilated membrane of tail cap, the rear end of needle file with the tail cap is pegged graft, the rear end of steel needle passes through the needle file is connected, and the front end of steel needle passes in proper order the back diaphragm orifice, the middle section hole of shell fragment, just the steel needle is dialled open the front end shielding part of shell fragment makes its elasticity overlap and press on the needle wall of steel needle, the steel needle extends behind the shell fragment seat, pass pipe seat, check valve core, check valve block stretch out to the pipe front end.
3. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury as claimed in claim 2, wherein: the elastic lock catch is an outward bending structure formed at the front part of the elastic sheet and is locked in the lock catch hole or the lock catch groove under the action of the steel needle.
4. The safety type indwelling needle with the device for preventing blood return overflow and needle stick injury according to claim 3, wherein: the front end shielding part is integrally formed at the front end of the elastic lock catch, and the elastic lock catch is elastically pressed on the needle wall of the steel needle, so that the elastic lock catch arches into a lock catch hole in the wall of the luer hole of the catheter seat; or the elastic lock catch is arched into a lock catch groove on the wall of the luer hole of the catheter base, so that the elastic sheet assembly and the catheter assembly are connected into a whole.
5. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury as claimed in any one of claims 2 to 4, wherein: the outer wall of the catheter seat is provided with a guide groove corresponding to the guide arm, the front part of the guide groove is provided with a lock catch boss, the front end of the needle seat is provided with the guide arm corresponding to the guide groove, and the front end of any guide arm is provided with a lock catch groove corresponding to the lock catch boss.
6. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury according to claim 5, wherein: the two guide arms are circumferentially and symmetrically distributed at the front ends of the needle bases, and the lock catch grooves at the front ends of the guide arms are elastically locked with the lock catch bosses on the guide grooves on the outer wall of the catheter base, so that the catheter assembly and the needle base assembly can be tightly attached together, looseness is reduced, and the catheter assembly is prevented from falling off.
7. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury according to claim 6, wherein: based on the structure of the elastic lock catch, the operation method of the safety indwelling needle comprises the following steps:
in the puncture process, when the catheter is pushed to go deep into the blood vessel, the pushing force enables the catheter seat, the lock catch boss on the guide groove and the lock catch groove at the front end of the guide arm of the needle seat to be separated and unlocked, when the needle seat assembly is withdrawn, the steel needle is withdrawn from the one-way valve block in the catheter seat, the lip of the plastic valve block is closed to prevent the return blood from overflowing and continue to withdraw the needle seat assembly, when the steel needle slides over the front shielding part of the elastic sheet, the front shielding part loses the support of the needle tube wall to make the elastic lock catch, under the action of resilience force, the catheter base leaves the lock catch hole of the catheter base and is unlocked with the wall of the lock catch hole, or the elastic lock catch leaves the lock catch groove of the catheter base under the action of resilience force and is unlocked with the groove wall, at the moment, the shielding part at the front end of the elastic sheet shields the steel needle tip, when the needle seat assembly is continuously withdrawn, the flat limit point of the steel needle tube is blocked by the back plate hole, so that the elastic sheet assembly is pulled out of the catheter seat along with the needle seat assembly.
8. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury according to claim 5, wherein: by arranging the guide arm and the guide groove, the following steps are carried out:
the push catheter assembly slides forwards by taking the needle seat guide arm as a track, so that the catheter can be pushed more conveniently in clinical operation and stretches into a blood vessel, and the phenomenon that the steel needle is pressed, bends downwards to stab the blood vessel or scratch the catheter can be avoided.
9. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury as claimed in claim 2, wherein: the rear end part of the catheter seat is provided with a thread section, and the thread section is clamped between bosses above the needle seat to prevent the catheter seat from rotating.
10. The safety type indwelling needle with the device for preventing backflow blood from overflowing and preventing needle stick injury as claimed in claim 2, wherein: one or more steel needle side holes are processed at the position, close to one end of the needle point, of the steel needle, so that blood return can be seen, the catheter seat is a transparent piece, and a first visible blood return window is arranged at the front end corresponding to the one-way valve plate; the needle base is a transparent piece, the needle base handle is provided with a second blood return window of the needle base, the outer side of the catheter base is provided with a butterfly wing, and the butterfly wing is provided with a binding and hanging hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243566.1A CN114602002A (en) | 2022-03-12 | 2022-03-12 | Safety type indwelling needle with blood return overflow preventing and needle-prick injury preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243566.1A CN114602002A (en) | 2022-03-12 | 2022-03-12 | Safety type indwelling needle with blood return overflow preventing and needle-prick injury preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114602002A true CN114602002A (en) | 2022-06-10 |
Family
ID=81862802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210243566.1A Withdrawn CN114602002A (en) | 2022-03-12 | 2022-03-12 | Safety type indwelling needle with blood return overflow preventing and needle-prick injury preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114602002A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115154752A (en) * | 2022-06-30 | 2022-10-11 | 上海普益医疗器械股份有限公司 | Visible blood return remaining needle with multiple observation positions |
-
2022
- 2022-03-12 CN CN202210243566.1A patent/CN114602002A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115154752A (en) * | 2022-06-30 | 2022-10-11 | 上海普益医疗器械股份有限公司 | Visible blood return remaining needle with multiple observation positions |
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Application publication date: 20220610 |
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