CN105833389B - Pressure-resistant low-resistance isolating plug and venous indwelling needle - Google Patents
Pressure-resistant low-resistance isolating plug and venous indwelling needle Download PDFInfo
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- CN105833389B CN105833389B CN201610336166.XA CN201610336166A CN105833389B CN 105833389 B CN105833389 B CN 105833389B CN 201610336166 A CN201610336166 A CN 201610336166A CN 105833389 B CN105833389 B CN 105833389B
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- 239000012790 adhesive layer Substances 0.000 claims abstract description 6
- 239000003292 glue Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 210000003462 vein Anatomy 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002872 contrast media Substances 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 206010044565 Tremor Diseases 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
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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
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/04—Access sites having pierceable self-sealing members
-
- 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
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0072—Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/04—Access sites having pierceable self-sealing members
- A61M2039/042—Shrouds encircling the access needle preventing accidental needle-stick
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a pressure-resistant low-resistance isolating plug and a venous indwelling needle, wherein the pressure-resistant low-resistance isolating plug respectively comprises a rear end plug body, a middle plug body and a front end plug body according to a puncture direction, the middle plug body is provided with a hollow channel, two sides of the middle plug body are respectively abutted with the rear end plug body and the front end plug body, at least the periphery of the front end plug body is in interference fit with the inner cavity wall of a catheter seat, a gap is reserved between the periphery of a puncture needle and the inner wall of the hollow channel after the puncture needle punctures, and the puncture needle is in sealed tight fit with the front end plug body and the rear end plug body. The middle plug body adopts an interference fit connection mode and adopts the UV adhesive layer for secondary fixation, so that a high-pressure-resistant effect is achieved, the requirements of contrast medium injection and the like are met, the contact area between the pressure-resistant low-resistance isolating plug and the puncture needle is small, the friction force is reduced, the plugging and unplugging operation is smooth, micro-tremor cannot be caused, and the discomfort of a patient is effectively prevented.
Description
Technical Field
The invention relates to an isolation plug, in particular to a pressure-resistant low-resistance isolation plug and a venous indwelling needle, and belongs to the technical field of medical instruments.
Background
The use of the vein indwelling needle can reduce the pain of the patient caused by repeated venipuncture and the fear of the needle, and reduce the anxiety of the family members.
The venous indwelling needle generally consists of a catheter combined needle tube set, wherein the catheter set consists of a catheter seat and a transfusion tube joint arranged on the catheter seat, the needle tube set consists of a needle seat and a puncture needle, and the puncture needle is inserted into the catheter seat.
In the prior art, a catheter seat is internally provided with a separation plug for puncture of a needle tube, the traditional separation plug is generally an integral silica gel plug body or rubber plug body, and the flexible material and the inner cavity of the catheter seat are not firmly matched, so that the pressure resistance of the isolation plug is poor.
If the pressure resistance of the isolating plug needs to be improved, namely a fixing mechanism needs to be additionally arranged at the tail end of the isolating plug in the catheter base, the fixing mechanism is a metal piece or a plastic piece, the assembly of the fixing mechanism is complex, the requirement on installation accuracy is high, and the manufacturing cost of a product is high.
The separation stopper generally is simple cylinder structure, and length is about 8cm, and the area of contact that leads to pjncture needle and rubber cock body is great, and frictional force is great between needle body and the rubber buffer when pjncture needle plug, difficult plug operation can arouse during the plug quivering a little, arouses patient's discomfort easily.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a pressure-resistant low-resistance isolation stopper and a venous indwelling needle.
The invention is realized by the following technical scheme:
a pressure-resistant low-resistance isolating plug is arranged in a catheter seat of a venous indwelling needle and is used for a puncture needle of the venous indwelling needle to pass through, the pressure-resistant low-resistance isolating plug respectively comprises a rear-end plug body, a middle plug body and a front-end plug body according to the puncture direction of the puncture needle,
wherein the middle plug body is provided with a hollow channel for the puncture needle to pass through, the inner diameter of the hollow channel is larger than the outer diameter of the puncture needle, two sides of the middle plug body are respectively abutted with the rear end plug body and the front end plug body, at least the periphery of the front end plug body is in interference fit with the inner cavity wall of the catheter seat,
after the puncture needle penetrates through the pressure-resistant low-resistance isolating plug, a gap is reserved between the periphery of the puncture needle and the inner wall of the hollow channel, and the puncture needle is hermetically and tightly connected with the front-end plug body and the rear-end plug body.
Preferably, a UV glue layer is arranged between the intermediate plug body and the inner cavity wall of the catheter base, and the UV glue layer is respectively bonded with the intermediate plug body and the catheter base.
Preferably, the middle plug body comprises a first ring body and a second ring body, the first ring body is in interference fit with the inner cavity wall of the catheter seat, and an annular groove chamber for accommodating a UV adhesive layer is formed between the periphery of the second ring body and the inner cavity wall of the catheter seat and the side wall of the first ring body.
Preferably, the catheter base is provided with a pouring port for pouring UV glue.
Preferably, the rear end plug body is an open flexible cover body, and the rear end plug body is sleeved on the second ring body of the middle plug body.
Preferably, the periphery of the rear end plug body is in interference fit with the inner cavity wall of the catheter base.
Preferably, the inner wall of the opening of the rear end plug body is in sealing connection with the middle plug body.
Preferably, the thickness of the front end plug body along the puncture direction of the puncture needle is 2.5-3 mm.
Preferably, the middle plug body is a plastic body, and the front end plug body and the rear end plug body are silica gel bodies or rubber bodies.
The invention also discloses a venous indwelling needle which comprises the pressure-resistant low-resistance isolating plug.
The invention has the outstanding effects that:
1. the middle plug body adopts an interference fit connection mode and adopts a UV adhesive layer for secondary fixation, so that the high-pressure resistant effect is achieved, and the middle plug body is suitable for requirements of contrast medium injection and the like.
2. The contact area between the puncture needle and the pressure-resistant low-resistance isolating plug is reduced, so that the friction force is reduced, the plugging operation is smooth, the micro-vibration cannot be caused, and the discomfort of a patient is effectively prevented;
3. the pressure-resistant low-resistance isolating plug consists of a rear end plug body, a middle plug body and a front end plug body, has an ingenious structure, reduces the contact area, ensures the structural strength of the pressure-resistant low-resistance isolating plug, and further increases the pressure resistance of the isolating plug because the rear end plug body and the front end plug body are in interference fit connection;
4. the back end plug body is sleeved on the middle plug body and is in sealed butt joint with the inner cavity wall of the catheter seat, the whole sealing performance of the pressure-resistant low-resistance isolation plug can be guaranteed, after the puncture needle is withdrawn, the front end plug body serves as a front seal and the back end plug body serves as a back seal, and the double-seal structure can effectively prevent blood backflow and liquid medicine leakage.
Drawings
FIG. 1 is a schematic cross-sectional view of a pressure-resistant low-resistance isolation plug according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of facilitating understanding and understanding of the technical solutions of the present invention.
A pressure-resistant low-resistance isolating plug and a venous indwelling needle are disclosed, as shown in figure 1, the pressure-resistant low-resistance isolating plug is arranged in a catheter seat 1 of the venous indwelling needle and is used for a puncture needle 2 of the venous indwelling needle to pass through, the pressure-resistant low-resistance isolating plug respectively comprises a rear plug body 3, a middle plug body 4 and a front plug body 5 according to the puncture direction of the puncture needle 2, the front end and the rear end are defined relative to the position of the puncture needle, the front end is one side close to the tip of the puncture needle, the rear end is one side far away from the tip of the puncture needle, wherein, the middle plug body 4 is provided with a hollow channel 6 for the puncture needle 2 to pass through, the inner diameter of the hollow channel 6 is larger than the outer diameter of the puncture needle, the puncture needle can be ensured to pass through smoothly, meanwhile, the puncture needle is prevented from contacting with the hollow channel, two sides of the middle plug body 4 are respectively abutted against the rear plug body 3 and the front plug body 5 to form a tight whole, wherein, at least the periphery 51 of the front end plug body 5 is in interference fit with the inner cavity wall of the catheter base 1, in the preferred embodiment, the periphery of the middle end plug body 4 and the periphery 51 of the front end plug body 5 are respectively in interference fit with the inner cavity wall of the catheter base 1, so that the whole sealing performance and the pressure resistance of the pressure-resistant low-resistance isolating plug are ensured.
After the puncture needle 2 penetrates through the pressure-resistant low-resistance isolating plug, a gap is reserved between the periphery of the puncture needle 2 and the inner wall of the hollow channel 6, and the puncture needle 2 is hermetically and tightly connected with the front end plug body 5 and the rear end plug body 3. The inner wall of hollow channel does not contact with the pjncture needle, and the thickness of the puncture direction of front end cock body 5 along the pjncture needle is 2.5~3mm, and the thickness of rear end cock body can neglect, very big reduction the area of contact of pjncture needle, reduced the frictional force of pjncture needle cross-under, the plug operation is smooth and easy, can not arouse quivering a little, effectively prevents to arouse patient's discomfort. The puncture needle 2 is tightly matched with the front end plug body 5 and the rear end plug body 3 in a sealing manner to form a double-sealing structure at the front end and the rear end, so that blood backflow and liquid medicine leakage can be effectively prevented.
It should be noted that a UV glue layer 10 is provided between the intermediate plug body 4 and the inner cavity wall of the catheter hub 1, and the UV glue layer 10 is respectively bonded to the intermediate plug body 4 and the catheter hub 1. At first, play preliminary high pressure resistant effect through the interference fit between the inner chamber wall of middle cock body and pipe seat, then carry out the secondary through UV glue with middle cock body and effectively fix, because middle cock body and pipe seat are the plastic body, the bonding effect of UV glue to the plastic body is showing, has further improved the high pressure resistance ability of isolation stopper, and the pressure resistance can reach 350PSI, and PSI english is called as pound per square inch entirely. P is pound, S is square, and I is inch. All units are converted into metric units to calculate: 1bar ≈ 14.5 PSI. Can be suitable for injecting contrast medium, and can meet the pressure-resistant requirement of injecting contrast medium.
To describe the scheme in detail, the middle plug body 4 includes a first ring body 7 and a second ring body 8, the periphery 71 of the first ring body 7 is in interference fit with the inner cavity wall of the catheter holder 1, and an annular groove 9 for accommodating a UV glue layer is formed between the periphery 81 of the second ring body 8 and the inner cavity wall of the catheter holder 1 and the side wall 72 of the first ring body 7. This annular groove room provides the space of pouring into UV and gluing, and UV glues and has strengthened the fixed effect to middle cock body, has increased withstand voltage nature. Have the sprue gate 11 that is used for pouring into the UV glue on the pipe seat for the injection of UV glue, pour into the UV through this sprue gate and glue convenient and fast, have the positioning action simultaneously.
The rear end plug body is optimized to be an open flexible cover body, the open flexible cover body is provided with a bead, and the rear end plug body 3 is sleeved on the second ring body of the middle plug body. The structure of the flexible cover body facilitates the abutting connection and the matching between the rear-end plug body and the middle plug body, increases the sealing property and is convenient to assemble. The edge is tightly matched with the annular groove chamber, so that the rear end plug body 3 is more tightly matched with the middle plug body and the inner cavity wall of the catheter seat, and the sealing performance and the pressure resistance are improved. Preferably, the open inner wall of the rear plug body 3 is in sealing fit with the intermediate plug body 4. The periphery of the back end plug body 3 is in interference fit with the inner cavity wall of the catheter base 1.
Finally, the catheter holder 1 in the scheme is a three-way body. The middle plug body 4 is a plastic body made of plastic, the plastic body is firmly and stably bonded with the UV glue, and injection molding is facilitated, and the front end plug body and the rear end plug body can be one or a mixture of more of natural rubber, isoprene, TPU, TPE, PVC and silica gel.
The invention also comprises a venous indwelling needle which adopts the pressure-resistant low-resistance isolating plug.
The technical solutions of the present invention are fully described above, it should be noted that the specific embodiments of the present invention are not limited by the above description, and all technical solutions formed by equivalent or equivalent changes in structure, method, or function according to the spirit of the present invention by those skilled in the art are within the scope of the present invention.
Claims (10)
1. The utility model provides a withstand voltage low resistance isolating plug, sets up in the pipe seat of vein indwelling needle, supplies the pjncture needle of vein indwelling needle to pass its characterized in that: the pressure-resistant low-resistance isolating plug comprises a rear end plug body, an intermediate plug body and a front end plug body respectively according to the puncture direction of a puncture needle, wherein the intermediate plug body is provided with a hollow channel for the puncture needle to penetrate through, the inner diameter of the hollow channel is larger than the outer diameter of the puncture needle, two sides of the intermediate plug body are respectively abutted against the rear end plug body and the front end plug body, at least the periphery of the front end plug body is in interference fit with the inner cavity wall of the catheter base, a gap is reserved between the periphery of the puncture needle and the inner wall of the hollow channel after the puncture needle penetrates through the pressure-resistant low-resistance isolating plug body, and the puncture needle is hermetically and tightly connected with the front end plug body and the rear end plug body.
2. A pressure-resistant low resistance spacer according to claim 1, wherein: and a UV adhesive layer is arranged between the middle plug body and the inner cavity wall of the catheter seat, and the UV adhesive layer is respectively bonded with the middle plug body and the catheter seat.
3. A pressure-resistant low resistance spacer according to claim 2, wherein: the middle plug body comprises a first ring body and a second ring body, the first ring body is in interference fit with the inner cavity wall of the catheter base, and an annular groove chamber for containing a UV adhesive layer is formed between the periphery of the second ring body and the inner cavity wall of the catheter base and the side wall of the first ring body.
4. A pressure resistant low resistance spacer according to claim 3, wherein: the catheter seat is provided with a pouring port for pouring UV glue.
5. A pressure resistant low resistance spacer according to claim 3, wherein: the rear end plug body is an open flexible cover body, and the rear end plug body is sleeved on the second ring body of the middle plug body.
6. A pressure resistant low resistance spacer according to claim 5, wherein: the periphery of the rear end plug body is in interference fit with the inner cavity wall of the catheter seat.
7. A pressure resistant low resistance spacer according to claim 5, wherein: the inner wall of the opening of the rear end plug body is in sealing connection with the middle plug body.
8. A pressure-resistant low resistance spacer according to claim 1, wherein: the thickness of the front-end plug body along the puncture direction of the puncture needle is 2.5-3 mm.
9. A pressure-resistant low resistance spacer according to claim 1, wherein: the middle plug body is a plastic body, and the front end plug body is a silica gel body or a rubber body; the rear end plug body is a silica gel body or a rubber body.
10. A venous indwelling needle comprising a pressure resistant low resistance septum according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336166.XA CN105833389B (en) | 2016-05-20 | 2016-05-20 | Pressure-resistant low-resistance isolating plug and venous indwelling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336166.XA CN105833389B (en) | 2016-05-20 | 2016-05-20 | Pressure-resistant low-resistance isolating plug and venous indwelling needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105833389A CN105833389A (en) | 2016-08-10 |
| CN105833389B true CN105833389B (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610336166.XA Active CN105833389B (en) | 2016-05-20 | 2016-05-20 | Pressure-resistant low-resistance isolating plug and venous indwelling needle |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308520A (en) * | 2017-08-11 | 2017-11-03 | 湖南平安医械科技有限公司 | A kind of batching pig and venous detaining needle |
| CN108815630A (en) * | 2018-06-28 | 2018-11-16 | 圣光医用制品股份有限公司 | Lower resistance batching pig and lower resistance venous detaining needle |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764412Y (en) * | 2005-02-25 | 2006-03-15 | 李�浩 | Venous indwelling needle for preventing blood refluence |
| CN101015721A (en) * | 2006-02-12 | 2007-08-15 | 董中新 | Artery-vein catherter preventing blood outflow provided with blood sampling opening |
| JP5253534B2 (en) * | 2011-03-15 | 2013-07-31 | メディキット株式会社 | Indwelling catheter |
| JP2013248158A (en) * | 2012-05-31 | 2013-12-12 | Jms Co Ltd | Indwelling needle device |
| CN204121524U (en) * | 2014-06-10 | 2015-01-28 | 丁培琪 | anti-reflux venous indwelling needle |
| CN203971057U (en) * | 2014-06-27 | 2014-12-03 | 陈伟权 | A kind of remaining needle |
| CN204158807U (en) * | 2014-09-02 | 2015-02-18 | 广东百合医疗科技股份有限公司 | A kind of pressure resistant type remaining needle |
| CN204158809U (en) * | 2014-10-10 | 2015-02-18 | 苏州林华医疗器械有限公司 | A kind of catheter block of venous detaining needle |
| CN204864352U (en) * | 2015-08-22 | 2015-12-16 | 北京大学深圳医院 | Prevent embolism vein and keep somewhere needle |
| CN205885899U (en) * | 2016-05-20 | 2017-01-18 | 苏州林华医疗器械股份有限公司 | Needle is kept somewhere to withstand voltage low resistance batching pig and vein |
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- 2016-05-20 CN CN201610336166.XA patent/CN105833389B/en active Active
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