CN113041439B - Closed needleless connection straight type indwelling needle - Google Patents
Closed needleless connection straight type indwelling needle Download PDFInfo
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- CN113041439B CN113041439B CN202011446205.4A CN202011446205A CN113041439B CN 113041439 B CN113041439 B CN 113041439B CN 202011446205 A CN202011446205 A CN 202011446205A CN 113041439 B CN113041439 B CN 113041439B
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- 238000007789 sealing Methods 0.000 claims abstract description 56
- 239000008280 blood Substances 0.000 claims description 21
- 210000004369 blood Anatomy 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
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- 239000004033 plastic Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 208000015181 infectious disease Diseases 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 238000001802 infusion Methods 0.000 description 11
- 210000004204 blood vessel Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
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- 229920000669 heparin Polymers 0.000 description 4
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- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- 238000005452 bending Methods 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
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- 238000003825 pressing Methods 0.000 description 2
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- 229910002027 silica gel Inorganic materials 0.000 description 2
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Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150503—Single-ended needles
-
- 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
- A61M2005/1586—Holding accessories for holding infusion needles on the body
-
- 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
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Hematology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Dermatology (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a closed needleless connection straight indwelling needle, which comprises an indwelling tube (1), a needle seat (2), a connecting tube (4), an elastic piece (6), a sealing piece (5), an outer sleeve (21) and a puncture needle (3) which are coaxially arranged. The straight indwelling needle not only can keep the characteristics of simple straight structure, but also has the advantage of convenient use of the Y-shaped structure, and can effectively prevent infection.
Description
Technical Field
The invention belongs to the technical field of transfusion medical appliances, and particularly relates to a closed needleless connection straight indwelling needle.
Background
The indwelling needle can be used for repeated transfusion, so that blood vessels can be effectively protected, and patients can be prevented from suffering from repeated puncture. The indwelling needle generally includes an infusion tube indwelling inside a blood vessel, a needle holder for holding the infusion tube for grasping, and a puncture needle inserted inside the infusion tube for guiding the infusion tube into the blood vessel. According to different structures and infusion directions after puncturing, the indwelling needle is divided into a Y-shaped structure and a straight structure, and the Y-shaped indwelling needle is mainly used in China at present.
The Y-shaped indwelling needle is closed, the side surface of the needle seat is provided with a catheter and a connector, the rear end of the needle seat is closed after the puncture needle is withdrawn, and transfusion is carried out by the catheter and the connector on the side surface. The Y-shaped indwelling needle is simpler to use and operate, but has the following defects: the structure is complex and the cost is high; bending of the long catheter can form a siphon effect, which is easy to cause blood reflux and form thrombus; the long catheter influences the activities of patients, and the use of the fixed adhesive tape is increased.
The straight indwelling needle is open, and the infusion direction is consistent with the puncturing direction. When the existing straight indwelling needle is used, the process of withdrawing the puncture needle requires one hand of medical staff to press the blood vessel to prevent blood from overflowing, and the other hand withdraws the needle and connects a heparin cap or a positive pressure connector after withdrawing the needle. Compared with the Y-shaped indwelling needle, the straight indwelling needle has simpler structure, low cost and portability, but the straight indwelling needle still has the following defects: 1) When blood return prevention is performed, the pressing operation is matched, so that pain and vascular injury of a patient are easily caused; 2) The operation difficulty of accessing the heparin cap or the positive pressure joint is high immediately, and the operation stability is not as good as that of a Y-shaped structure even if the operation method is mastered; 3) The heparin cap is connected through a syringe with a needle, so that puncture injury and blood source exposure of medical staff are easily caused; 4) The positive pressure joint belongs to needleless connection, but a gap between the joint and the piston cannot be disinfected, is easy to pollute, and then causes infection.
Disclosure of Invention
Aiming at the defects of the prior art, the invention mainly aims to provide the closed needleless connection straight indwelling needle which can not only keep the characteristic of simple straight structure, but also has the advantage of convenient use of a Y-shaped structure and can effectively prevent infection.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The utility model provides a straight type of keeping somewhere needle of closed needleless connection, includes to keep somewhere pipe, needle file, connecting pipe, elastic component, closure piece, overcoat and the puncture needle that sets up with coaxial mode, its characterized in that:
the retaining tube is fixedly connected with the needle seat in a mode that the rear end of the retaining tube is embedded into the needle seat;
The connecting pipe is fixedly connected with the needle seat in a mode that the front end of the connecting pipe is embedded into the needle seat, and the front port and the rear port of the indwelling tube are communicated with each other in the needle seat;
The outer sleeve is of a hollow structure with front and rear openings, the front end of the outer sleeve is fixedly connected with the rear end of the needle seat, and the rear end of the outer sleeve is provided with an inward barrier; the cavity formed between the outer sleeve and the needle seat shields the elastic piece and the sealing piece;
The elastic piece is of a hollow structure and is arranged outside the connecting pipe, the front end face of the elastic piece is connected with the rear end face of the needle seat, and the rear end face of the elastic piece is connected with the front end face of the sealing piece;
the radial dimension of the closure member is matched with the inner dimension of the cavity, so that the closure member can move axially in the cavity;
In the initial state, the sealing piece seals the rear end opening of the connecting pipe, and the rear end surface of the sealing piece is connected with the front end surface of the blocking piece; the puncture needle sequentially passes through the sealing piece, the connecting pipe and the indwelling pipe from back to front, and the needle point is exposed outside the indwelling pipe.
In the present invention, unless otherwise indicated, the front end means the end to which the piercing needle tip points, and the rear end means the opposite end.
In the straight indwelling needle of the present invention, the needle holder is a base member for setting and fixing other components, and the material and structure thereof can be conventionally designed as is well understood and ascertained by those skilled in the art. As a preferred embodiment, the bottom side of the needle seat is provided with symmetrical fins, so that better operability can be provided, and the needle seat is fixed by being favorably attached to the skin of a human body; the outer edge of the rear end of the needle seat is provided with an annular bulge so as to be fixedly connected with the front end of the outer sleeve in a clamping, screwing or bonding mode.
The indwelling tube is a hollow hose, typically made of PC or FPE, which is readily understood and ascertainable by those skilled in the art and is well within the knowledge of those skilled in the art.
In the straight indwelling needle of the present invention, the connecting tube is preferably made of a metal material such as hard plastic or stainless steel, which can increase the overall strength of the structure, improve the structural stability of the puncture needle when being pierced and pulled out, and ensure that the connecting tube has sufficient bending strength when an axial force is applied to the closure member. The back port of the connecting pipe can be designed into a flat port, a side port, an inclined port and the like according to application requirements, and the different effects are that: the flat and side ports may increase the stability of the infusion and closure, while the beveled port may reduce the difficulty of piercing the closure.
The elastic piece is of a hollow structure and is arranged outside the connecting pipe. In the initial state, the elastic piece provides support and positioning for the sealing piece, so that the sealing piece is ensured to realize the purpose of sealing the rear port of the connecting pipe; during injection operation, the elastic piece is axially extruded by the sealing piece, and deforms so that the rear port of the connecting pipe can penetrate out of the sealing piece; after the operation is finished, the deformation is converted into axial resilience force to promote the restoration of the closure. It is therefore easy to understand that the elastic member is made of an elastic material, such as elastic rubber or elastic silica gel; or an elastic member (e.g., a spring) made of a non-elastic material.
As a preferred embodiment, the elastic member is an elastic tube made of elastic material, and the front end of the elastic tube is connected with the needle seat in a sealing way by bonding or the like, and the rear end of the elastic tube is connected with the sealing member in a sealing way. The scheme has the effects that: the structure is simple, the manufacture and the assembly are convenient, and the large-scale popularization is suitable; the connecting pipe can be covered by the sealing piece, so that the risk of external pollution is reduced. Furthermore, the elastic tube and the sealing piece can be made of the same material through integral molding, so that the production can be simplified, the cost is reduced, and the production efficiency is improved.
As an alternative embodiment, the tube wall of the elastic tube may be provided in an axially corrugated structure, which is advantageous for further improving the elasticity and operational stability of the elastic tube.
As another alternative embodiment, the elastic piece is a spiral spring, and the front end and the rear end of the spring are fixedly connected with the rear end face of the needle seat and the front end face of the sealing piece in a buckling, bonding and other modes respectively. Further preferably, when the elastic member is a coil spring, the connecting tube is sleeved with a sealing tube made of flexible material, and the front end and the rear end of the sealing tube are fixedly connected with the rear end face of the needle seat and the front end face of the sealing member respectively. The sealing tube completely shields the connection tube between the hub and the closure and isolates it from the coil spring, thereby enabling further reduction of the risk of contamination of the connection tube.
The closure member is made of an elastic material, such as an elastic rubber or elastic silicone, capable of moving axially within the cavity under a force such as a forward pushing force or a backward elastic force generated by deformation of the elastic member. In the initial state, the sealing piece seals the rear port of the connecting pipe and prevents the connecting pipe from contacting the outside; during injection operation, forward axial force is applied to the sealing member, and the rear port of the connecting pipe penetrates out of the sealing member and is communicated with the liquid outlet of the injector.
The front end of the outer sleeve is fixedly connected with the rear end of the needle seat in a clamping, screwing or bonding mode, and the like, so that a cavity for the elastic piece and the sealing piece to move is formed. The rear end of the outer sleeve is provided with a stop to prevent the closure from exiting the cavity.
The interior of the piercing needle is hollow and its structure is readily ascertainable to those skilled in the art and is well within the knowledge of those skilled in the art. As a preferred implementation mode, the rear end of the puncture needle is connected with a blood return chamber, an air hole is arranged on the blood return chamber, and a liquid resistance film is arranged on the air hole; the outside of the blood return chamber can be fixedly provided with a grab handle so as to be convenient for operation.
On the basis of fully understanding the structure and functions of each part of the straight type indwelling needle of the present invention, it is easy to understand and determine how to manufacture the straight type indwelling needle, how to perform the indwelling operation, and how to perform the injection operation after the indwelling operation. Among other things, the indwelling procedure may be performed in a manner conventional in the art, generally including: skin disinfection; the puncture needle is penetrated to guide the indwelling tube to stay in the blood vessel; the puncture needle is withdrawn, and the retention needle is fixed by means of medical adhesive tape, etc. After the indwelling, the injecting operation may illustratively include the following steps:
(1) Sterilizing the rear end face of the sealing piece;
(2) Attaching the injection port of the needleless injector to the rear end surface of the sealing member in a coaxial manner, then applying pressure forwards along the axial direction, and promoting the sealing member to move forwards until the rear port of the connecting pipe penetrates out of the sealing member, wherein the indwelling pipe, the connecting pipe and the injection port of the injector are sequentially communicated; at the same time, the elastic piece is axially extruded to deform and is in a force storage state;
(3) Injecting the liquid medicine from the injector;
(4) After the injection is completed, the forward axial pressure is removed; at this time, the closing member is restored under the axial resilience force of the elastic member to close the rear port of the connection pipe again.
It will be readily appreciated that the straight indwelling needle of the present invention is equally applicable to operations for drawing body fluids such as blood, based on similar procedures.
Compared with the prior art, the invention has the following advantages:
(1) The straight indwelling needle is convenient to use. After the puncture needle retreats and the injection operation is finished, the sealing piece can automatically seal the rear port of the connecting pipe, medical staff can concentrate on the indwelling and injection operation, does not need to press veins, does not need to be stressed on installing a heparin cap or a positive pressure connector, can effectively simplify the operation links, and reduces the error rate.
(2) The flow passage formed by the indwelling pipe and the connecting pipe is always in a state of being isolated from the outside, and the joint can be ensured to be sterile only by sterilizing the rear end face of the sealing piece when the infusion set is used, so that the external pollution is prevented, and meanwhile, the design can also avoid the environmental pollution caused by the leakage of the infusion set. In contrast, conventional joints and plugs can grow bacteria in the gap where they slide and are difficult to sterilize.
(3) When the straight indwelling needle is used, the connecting pipe is directly connected with the needleless injector or the needleless infusion connector, and a needle is not needed, so that consumable materials are reduced, and stabbing and blood source exposure of personnel can be effectively avoided.
(4) Simple structure and is beneficial to mass production. The invention can avoid the problem that the Y-shaped indwelling needle is required to be provided with a long catheter, not only saves raw materials, but also is more comfortable for patients to use, and can not be negatively influenced by accessories such as the long catheter.
Drawings
FIG. 1 is a schematic view showing the overall cross-sectional structure of a straight indwelling needle according to the first embodiment;
FIG. 2 is a schematic view showing a structure of the components of the straight indwelling needle according to the first embodiment in a state of not being fully assembled;
FIG. 3 is a physical view showing the partially assembled and fully assembled components of the straight indwelling needle according to the second embodiment;
FIG. 4 is a schematic cross-sectional view of the straight indwelling needle according to the first embodiment after the puncture needle is taken out;
fig. 5 is a schematic sectional view showing the structure of the straight type indwelling needle according to the first embodiment in the injecting state.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following technical solutions of the present invention will be more clearly and completely described with reference to specific embodiments and drawings, but should not be construed as limiting the scope of protection of the present invention.
Example 1
Fig. 1 shows a closed needleless connection straight type indwelling needle of the present invention, comprising an indwelling tube 1, a needle holder 2, a puncture needle 3, a connection tube 4, an elastic member 6, a closing member 5 and an outer sheath 21 which are coaxially arranged. Wherein:
the outer edge of the rear end of the needle seat 2 is provided with a backward annular bulge 22, and the bottom side of the needle seat 2 is fixedly provided with laterally symmetrical fins 23 in a bonding manner.
The indwelling tube 1 is a hollow hose made of FPE material, and is fixedly connected with the needle seat 2 in a mode that the rear end of the indwelling tube is embedded into the needle seat 2.
The connecting tube 4 is made of stainless steel, is fixedly connected with the needle holder 2 in a manner that the front end is embedded into the needle holder 2, and the front port and the rear port of the indwelling tube 1 are communicated with each other in the needle holder 2; the rear port 41 of the connection pipe 4 is designed in a bevel-mouth structure.
The outer sleeve 21 is a hollow tubular structure with front and rear openings, and the diameter size is consistent with the annular bulge 22 of the needle seat 2. The front end of the outer sleeve 21 is fixedly connected with the annular protrusion 22 in a screwing manner, and the rear end is provided with an inward blocking 211. The cavity formed between the needle holder 2 and the outer sleeve 21 shields the elastic member 6 and the closing member 5 integrally.
The elastic member 6 is connected with the closing member 5 back and forth, and both are made of elastic rubber and integrally formed. The elastic member 6 is specifically a hollow elastic tube 62, the front end of which is closed and the center of which is provided with a through hole for the connecting tube 4 to pass through, the axial length of the elastic tube 62 is smaller than the length of the connecting tube exposed outside the needle seat 2, the inner diameter is larger than the outer diameter of the connecting tube 4, and the outer diameter is smaller than the inner diameter of the annular protrusion 22. The elastic tube 62 is sleeved outside the connecting tube 4, and the front end surface is fixedly connected with the rear end surface of the needle seat 2 in a sealing bonding mode.
The outer diameter of the closure 5 is sized to match the inner diameter of the outer sleeve 21 to ensure that the closure 5 is able to move axially stable within the outer sleeve 21; the axial length of the cavity is slightly smaller than the sum of the lengths of the elastic tube 62 and the closure 5 in the natural state, so that the assembled elastic tube 62 is slightly deformed due to axial extrusion.
As shown in fig. 1, in the initial state, the elastic tube 62 is in a micro-accumulation state; the rear port 41 of the connection pipe 4 is closed by the closure 5 of a columnar structure, and the rear end surface of the closure 5 is connected to the front end surface of the stopper 211.
The puncture needle 3 sequentially passes through the sealing piece 5, the connecting pipe 4 and the indwelling pipe 1 from back to front, and the needle tip is exposed outside the indwelling pipe 1. The rear end of the puncture needle 3 is connected with a blood return chamber 31 made of hard transparent plastic, an air hole 32 is arranged at the rear end of the cavity of the blood return chamber 31, a liquid resistance film 33 covering the air hole 32 is fixedly arranged on the air hole 32 in a bonding mode, and a grab handle 34 is fixedly arranged on the outer wall of the blood return chamber 31.
Fig. 2 is a schematic view showing the structure of each component of the straight indwelling needle shown in fig. 1 in a state where the components are not completely assembled, so as to more clearly show the structure of each component.
Example two
The structure of the closed needleless connection straight indwelling needle is similar to that of the straight indwelling needle shown in fig. 1, and the difference is that: the tube wall of the elastic tube 62 is provided in a corrugated structure in the axial direction.
In the initial state, the pleated structure is in the relaxed state, applying only a preset elastic force to the closure 5; when subjected to axial pressure, the pleated structure collapses, creating a spring force between the hub 2 and the closure 5.
In order to more intuitively show the structure of the straight indwelling needle, fig. 3 shows an incompletely assembled state of each component and a physical diagram after complete assembly. Fig. 3a is a physical diagram of each component in a state of not being completely assembled, and fig. 3b is a physical diagram of the whole of each component after being completely assembled.
Example III
The structure of the closed needleless connection straight type indwelling needle is similar to that of the straight type indwelling needle of the first embodiment, and the difference is that:
The elastic piece 6 is a spiral spring, and the front end and the rear end of the spring are fixedly connected with the rear end face of the needle seat 2 and the front end face of the sealing piece 5 respectively;
The device also comprises a sealing tube made of flexible silica gel, the sealing tube is sleeved outside the connecting tube 4, and the front end and the rear end of the sealing tube are respectively fixedly connected with the rear end face of the needle seat 2 and the front end face of the sealing piece 5 in a sealing bonding mode. The sealing tube completely shields the connection tube between the needle holder 2 and the closure 5 and isolates it from the coil spring.
Application examples
As described above, it is easy for those skilled in the art to understand and determine how to use the straight type indwelling needle according to the present invention, based on a sufficient understanding of the structure and functions of the respective parts. By way of non-limiting example, the closed needleless connection straight indwelling needle shown in FIG. 1 will be described herein as the procedure of its indwelling operation and post-indwelling injection operation, respectively.
1. Indwelling operation
The indwelling procedure includes the following steps:
1) And (3) disinfection:
And (3) disinfecting the skin surface of the patient at the position to be infused.
2) And (3) retention:
The straight indwelling needle of the present invention is used to puncture with the puncture needle 3 and guide the indwelling catheter 1 into the target blood vessel, and then the condition of blood return is observed through the transparent outer wall of the blood return chamber 31 until blood enters the blood return chamber 31 from the rear port of the puncture needle 3.
3) Needle withdrawal:
While the needle holder 2 is fixed by one hand, the other hand holds the grip 34 on the blood return chamber 31 to withdraw the puncture needle 3 from the straight indwelling needle. After withdrawal, the closure 5 automatically closes the rear port 41 of the connecting tube 4, preventing blood from escaping.
4) Fixing:
the skin penetration port, the indwelling tube 1 and the needle holder 2 (from the tab 23) are fixed using a medical adhesive tape.
Through the steps, the indwelling state shown in fig. 4 can be realized at the infusion site.
2. Injection operation
After successful indwelling, the injection of the liquid medicine through the straight indwelling needle comprises the following steps:
1) And (3) disinfection:
And (5) disinfecting the exposed rear end surface of the sealing piece 5 by using alcohol cotton, and naturally airing the disinfectant.
2) And (3) communication:
As shown in fig. 5, the injection port of the needleless syringe 100 is fitted to the rear end face of the closure member 5 in a coaxial manner, and then a pushing force is applied forward in the axial direction, so that the closure member 5 is moved forward along the inner wall of the outer jacket 21 until the rear port 41 of the connection tube 4 passes out of the closure member 5, at which time the indwelling tube 1, the connection tube 4 and the injection port of the syringe 100 are communicated in order. At the same time, the elastic tube 62 is deformed by axial extrusion, and is in a force storage state.
3) Injection:
the piston handle of the syringe 100 is pushed to inject the liquid medicine, and the liquid medicine sequentially enters the human body through the injection port, the connecting tube 4 and the indwelling tube 1.
4) Resetting:
After injection is completed, the forward axial pressure is removed and the syringe 100 is removed. At this time, the closing member 5 is returned by the axial resilience of the elastic tube 62, the rear port 41 of the connection tube 4 is closed again, and the whole indwelling needle is returned to the state before injection.
Claims (10)
1. The utility model provides a straight type of keeping somewhere needle of closed needleless connection, includes keep somewhere pipe (1), needle file (2), connecting pipe (4), elastic component (6), closure piece (5), overcoat (21) and puncture needle (3) that set up with coaxial mode, its characterized in that:
the retaining tube (1) is fixedly connected with the needle seat (2) in a mode that the rear end of the retaining tube is embedded into the needle seat (2);
the connecting pipe (4) is fixedly connected with the needle seat (2) in a mode that the front end of the connecting pipe is embedded into the needle seat (2), and the front port and the rear port of the indwelling pipe (1) are communicated with each other in the needle seat (2); the connecting pipe (4) is made of hard plastic or metal material;
the outer sleeve (21) is of a hollow structure with front and rear openings, the front end of the outer sleeve (21) is fixedly connected with the rear end of the needle seat (2), and the rear end of the outer sleeve (21) is provided with an inward barrier (211); the cavity formed between the outer sleeve (21) and the needle seat (2) shields the elastic piece (6) and the sealing piece (5) inside;
The elastic piece (6) is of a hollow structure, is arranged outside the connecting pipe (4), and the front end face of the elastic piece is connected with the rear end face of the needle seat (2) and is connected with the front end face of the sealing piece (5); the elastic piece (6) is made of elastic material or an elastic member made of inelastic material;
the radial dimension of the closure (5) matches the inner dimension of the cavity such that the closure (5) is axially movable within the cavity; the closure (5) is made of an elastic material;
In an initial state, the elastic piece (6) provides support and positioning for the sealing piece (5), the sealing piece (5) seals the rear port (41) of the connecting pipe (4) inside, and the rear end face of the sealing piece (5) is connected with the front end face of the blocking piece (211); the puncture needle (3) sequentially passes through the sealing piece (5), the connecting pipe (4) and the indwelling pipe (1) from back to front, and the needle point is exposed outside the indwelling pipe (1);
When the puncture needle (3) is withdrawn from the straight retention needle, the sealing piece (5) automatically seals the rear port (41) of the connecting pipe (4);
When the closure (5) is pushed forward along the inner wall of the casing (21), the rear port (41) of the connection tube (4) can be made to pass out of the closure (5).
2. The straight indwelling needle according to claim 1, wherein: the bottom side of the needle seat (2) is provided with symmetrical fins (23); the outer edge of the rear end of the needle seat (2) is provided with an annular bulge (22) which is fixedly connected with the front end of the outer sleeve (21).
3. The straight indwelling needle according to claim 1, wherein: the rear port (41) of the connecting tube (4) is designed as a plain, side or bevel.
4. The straight indwelling needle according to claim 1, wherein: the elastic piece (6) is an elastic tube (62) made of elastic material, the front end of the elastic tube is connected with the needle seat (2) in a sealing way, and the rear end of the elastic tube is connected with the sealing piece (5) in a sealing way.
5. The straight indwelling needle according to claim 4, wherein: the elastic tube (62) and the sealing piece (5) are made of the same material through integral molding.
6. The straight indwelling needle according to claim 4 or 5, wherein: the tube wall of the elastic tube (62) is provided with a fold structure along the axial direction.
7. The straight indwelling needle according to claim 1, wherein: the elastic piece (6) is a spiral spring, and the front end and the rear end of the spring are respectively fixedly connected with the rear end face of the needle seat (2) and the front end face of the sealing piece (5).
8. The straight indwelling needle according to claim 7, wherein: the connecting pipe (4) is sleeved with a sealing pipe made of flexible materials, and the front end and the rear end of the sealing pipe are fixedly connected with the rear end face of the needle seat (2) and the front end face of the sealing piece (5) respectively.
9. The straight indwelling needle according to claim 1, wherein: the closure (5) is made of elastic rubber or elastic silicone.
10. The straight indwelling needle according to claim 1, wherein: the rear end of the puncture needle (3) is connected with a blood return chamber (31), an air hole (32) is arranged on the blood return chamber (31), and a liquid resistance film (33) is arranged on the air hole (32); a grab handle (34) is fixedly arranged outside the blood return chamber (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446205.4A CN113041439B (en) | 2020-12-08 | 2020-12-08 | Closed needleless connection straight type indwelling needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446205.4A CN113041439B (en) | 2020-12-08 | 2020-12-08 | Closed needleless connection straight type indwelling needle |
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| Publication Number | Publication Date |
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| CN113041439A CN113041439A (en) | 2021-06-29 |
| CN113041439B true CN113041439B (en) | 2024-09-03 |
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| CN202011446205.4A Active CN113041439B (en) | 2020-12-08 | 2020-12-08 | Closed needleless connection straight type indwelling needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115444414A (en) * | 2022-08-24 | 2022-12-09 | 广州市妇女儿童医疗中心 | A blood collection needle and a method for using the blood collection needle |
Citations (1)
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|---|---|---|---|---|
| CN101239217A (en) * | 2007-08-10 | 2008-08-13 | 张亚根 | Safety type artery and vein indwelling needle with needleless closed positive pressure interface |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4512766A (en) * | 1982-12-08 | 1985-04-23 | Whitman Medical Corporation | Catheter valve |
| US5234410A (en) * | 1992-10-23 | 1993-08-10 | Vlv Associates | Catheter assembly |
| CN201481913U (en) * | 2009-09-14 | 2010-05-26 | 怡安医疗器材股份有限公司 | Low back pressure needle-free combination and device thereof |
| CN102145198A (en) * | 2010-02-09 | 2011-08-10 | 怡安医疗器材股份有限公司 | Low back pressure needle-free combination and device thereof |
| CN103272305A (en) * | 2013-05-15 | 2013-09-04 | 浙江康泰医疗器械有限公司 | Novel pen type indwelling needle |
| CN205127005U (en) * | 2015-10-23 | 2016-04-06 | 谢世庚 | Needle is kept somewhere to pressure -fired |
| CN209827791U (en) * | 2019-04-08 | 2019-12-24 | 深圳安特医疗股份有限公司 | Needleless infusion joint |
| CN211050500U (en) * | 2019-08-26 | 2020-07-21 | 佳康医用器材（青岛）有限公司 | Closed straight venous indwelling needle |
| CN111450351B (en) * | 2020-04-02 | 2025-04-18 | 江苏安卓医疗科技有限公司 | A needle-free connector |
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2020
- 2020-12-08 CN CN202011446205.4A patent/CN113041439B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239217A (en) * | 2007-08-10 | 2008-08-13 | 张亚根 | Safety type artery and vein indwelling needle with needleless closed positive pressure interface |
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