CN112807522B - Flexible needle tube, preparation method thereof and flexible instillation needle - Google Patents
Flexible needle tube, preparation method thereof and flexible instillation needle Download PDFInfo
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- CN112807522B CN112807522B CN202110257029.8A CN202110257029A CN112807522B CN 112807522 B CN112807522 B CN 112807522B CN 202110257029 A CN202110257029 A CN 202110257029A CN 112807522 B CN112807522 B CN 112807522B
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- needle
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- silicic acid
- acid gel
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 abstract description 10
- 239000003814 drug Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 210000003462 vein Anatomy 0.000 description 10
- 238000001802 infusion Methods 0.000 description 8
- 241000699670 Mus sp. Species 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000001990 intravenous administration Methods 0.000 description 4
- 210000003491 skin Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000699666 Mus <mouse, genus> Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000010253 intravenous injection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 210000003752 saphenous vein Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000011277 treatment modality Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The utility model discloses a flexible needle tube, a preparation method thereof and a flexible instillation needle, which belong to the technical field of medicine and are prepared by (1) preheating: preheating PVC into paste to prepare PVC paste; (2) material preparation: mixing the PVC paste prepared in the step (1) with silicic acid gel under a high-temperature low-pressure environment to prepare raw materials; the mass ratio of the PVC paste to the silicic acid gel is 7.5-9:1; (3) molding: and (3) extruding and molding the raw material prepared in the step (2) to prepare the flexible needle tube. The flexible needle tube prepared by the method is formed by PVC and silicic acid gel, so that supporting force can be provided for the puncture needle head, and the puncture direction is restrained; but also has certain flexibility, can be used as a new material for bending along with muscles, and avoids accidents such as dropping and even bulging of the needle caused by the movement of the muscles to drive the instillation needle.
Description
Technical Field
The utility model belongs to the technical field of medicine, and particularly relates to a flexible needle tube, a preparation method thereof and a flexible instillation needle.
Background
In medicine, intravenous drip is a treatment mode of inputting large-dose liquid medicine into a body through a transfusion tube by veins, the drip part is generally at the superficial veins of the back of the hand and the upper arm, and can also be infused at the veins of the instep and the great saphenous vein, and children are also often selected at the head epidermis vein. Intravenous drip has become the most popular treatment modality because of its advantages of reduced pain for the patient and ease of penetration.
The instillation needle used at present generally comprises a needle seat, one end of the needle seat is connected with a needle body, the other end of the needle seat is connected with a hose, and a handle is fixed on the needle seat. When in use, medical staff holds the handle to pierce the head of the needle body into the intravenous drip liquid medicine of the human body, and the needle seat is fixed on the skin of the human body through the handle, so as to achieve the purpose of fixing the needle body. The instillation needle with the structure greatly reduces the movable space of the instillation part, the head of the needle body can slide or shift due to slight carelessness, and even the instillation needle is not easily perceived to be separated from the vein of the human body, so that subcutaneous effusion is caused, and the pain of a patient is increased.
Chinese patent 201620621565.6 discloses a fixed intravenous drip needle, which is characterized in that the lower end of the infusion needle is fixed in the upper end of an infusion tube, and a handle is fixed outside the infusion tube; the front part of the left side of the handle is provided with a V-shaped groove which is vertically penetrated and provided with a breaking line at the bottom of the groove, the V-shaped groove divides the handle into a left fixing part and a right breaking part, and the fixing part is fixed with the infusion tube; at least one flexible sheet is fixedly connected on the infusion tube corresponding to the handle. When the infusion needle is used, the breaking part is broken along the V-shaped groove and taken down, and the flexible sheet and the infusion tube are fixed on the surface of the skin of a patient by using the adhesive tape, and the needle is fixed by fitting the skin of a human body due to the soft texture of the flexible sheet, so that the infusion needle is prevented from sliding down and shifting. The drip needle still does not have the problem of limited movement of the drip site.
The Chinese patent 201922327568.5 discloses a drug delivery device for oncology, wherein an injection needle arranged at the front end of an injection syringe consists of a needle core made of metal materials, a flexible catheter sleeved outside the needle core and a puncture needle fixedly connected at the front end of the flexible catheter, the needle core and the catheter can be in pull sliding fit, a needle core guide tube is arranged on the outer side wall of the front end of the injection syringe, the needle core guide tube is communicated with the inside of the front end of the injection syringe, the tail end of the needle core penetrates through the needle core guide tube, and a handle convenient to hold is arranged at the tail end of the needle core. When in use, the front end of the needle core is inserted into the tail end of the puncture needle head, and the handle is fixed on the outer side wall of the injection syringe; after the needle core is punctured to the designated position, the needle core is pulled out of the catheter backwards, so that the needle core guide tube is communicated with the inside of the front end of the injection needle cylinder, the push rod is pushed to push the liquid medicine in the injection needle cylinder to the affected part, and at the moment, the liquid medicine in the injection needle cylinder is soft because no needle core is supported in the catheter, so that the position of a puncture needle head is influenced by the swing of the injection needle cylinder when medicine is slowly injected, and the problem that the liquid medicine leaks due to the swing of the injection needle cylinder is solved. It is obvious that the catheter only plays a role of flexible connection, and still requires rigid support of the needle core during injection and puncture, thus complicating the structure of the needle.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a flexible needle tube, a preparation method thereof and a flexible instillation needle, which not only can restrict the puncture direction of a puncture needle, but also can bend along with muscles.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a flexible needle tube is designed, which is characterized in that: the raw materials are composed of PVC and silicic acid gel, and the mass ratio of the PVC to the silicic acid gel is 7.5-9:1.
Further, the mass ratio of PVC to silicic acid gel is 8:1.
The utility model also provides a preparation method of the flexible needle tube, which is characterized in that: is prepared through the following steps:
(1) Preheating: preheating PVC into paste to prepare PVC paste;
(2) The reaction: mixing the PVC paste prepared in the step (1) with silicic acid gel under a high-temperature low-pressure environment to prepare raw materials; the mass ratio of the PVC paste to the silicic acid gel is 7.5-9:1;
(3) And (3) forming: and (3) extruding and molding the raw material prepared in the step (2) to prepare the flexible needle tube.
Further, the step (1) is performed in a high-temperature low-pressure environment, and the high-temperature low-pressure environment in the step (1) and the step (2) is at a temperature of 125-150 ℃ and a gas pressure of 70-100 KPa.
Further, step (3) is performed in an environment in which a desiccant is present.
Further, the step (3) is performed in a space in which cobalt chloride is sealed and anhydrous at a temperature of 90 to 95 ℃.
Further, in the step (2), the mass ratio of the PVC paste to the silicic acid gel is 8:1.
The utility model also provides a instillation needle formed by the flexible needle tube, which comprises a needle seat, wherein the needle seat is provided with an instillation needle body, and the instillation needle is characterized in that: the instillation needle body comprises a flexible needle tube and a puncture needle head, the rear end of the flexible needle tube is fixed on the needle seat, the puncture needle head is fixed at the front end of the flexible needle tube, and the flexible needle tube is manufactured by the manufacturing method.
Further, the length of the puncture needle head is 12-18 mm.
Further, a flexible handle is fixed on the needle seat.
Compared with the prior art, the utility model has the beneficial effects that:
1. because the raw materials are composed of PVC and silicic acid gel according to the mass ratio of 7.5-9:1, the puncture needle head can provide supporting force for the puncture needle head and restrict the puncture direction; but also has certain flexibility, can be along with the new material of muscle bending, avoid muscle activity to drive the instillation needle, cause the needle release and even the needle bulging.
2. The specific production process overcomes the defect that PVC and silicic acid gel are incompatible under normal conditions, so that the PVC and silicic acid gel can be uniformly mixed to form a material with new characteristics, and the high-temperature low-pressure environment is favorable for discharging bubbles and water in the new material, so that the PVC/silicic acid gel has fine texture and uniform and controllable flexibility.
3. Because the forming is carried out in the environment with the drying agent, the moisture released by the drying needle tube in the forming process can be absorbed in time, and the forming quality of the needle tube is improved.
4. Because the flexible needle tube replaces most of the instillation needle body, only the puncture needle head at the most end part is reserved, and the flexible needle tube has certain supporting force and certain flexibility, is convenient for directional puncture of the puncture needle head, and can bend along with muscles in the use process, so that the traction force of the muscle activity to the puncture needle head is buffered, and the puncture needle head is relatively fixed in the position of a vein.
5. Because the handle is fixed on the needle seat, the puncture operation of the instillation needle is convenient, and the needle seat is convenient to fix after the puncture.
6. The flexible needle tube is unique in conception, and the flexible needle tube is manufactured through a specific formula and technology, so that the puncture direction of the puncture needle head can be restrained, the flexible needle tube can be bent along with muscles, the puncture needle head is prevented from causing accidental damage to veins, and the flexible needle tube is convenient to popularize and apply in industry.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The marks in the figure: 1. a puncture needle; 2. a flexible needle tube; 3. a needle stand; 4. a handle.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
When the utility model is in use, the end close to the muscle is defined as the front end, and the end far away from the muscle is defined as the rear end.
Example 1
The flexible needle tube is manufactured through the following steps:
(1) Preheating PVC into paste in an environment with the temperature of 150 ℃ and the air pressure of 100KPa to prepare PVC paste;
(2) Mixing the PVC paste prepared in the step (1) with silicic acid gel in an environment with the temperature of 150 ℃ and the air pressure of 100KPa to prepare raw materials; the mass ratio of the PVC paste to the silicic acid gel is 7.5:1;
(3) And (3) extruding and molding the raw material prepared in the step (2) in a sealed space with anhydrous cobalt chloride at the temperature of 90 ℃ to prepare the flexible needle tube.
As shown in fig. 1, the rear end of the flexible needle tube 2 manufactured in the above way is fixed on the needle seat 3, and the front end of the flexible needle tube 2 is fixed with the puncture needle head 1, so that the flexible needle tube 2 and the puncture needle head 1 are connected to be used as a instillation needle body in the prior art. The length of the puncture needle 1 is 12-18 mm, and can be 10mm, 12mm, 15mm or 18mm. In order to facilitate the puncturing operation and the fixation after puncturing, a handle 4 is also fixed on the needle seat 3.
Example two
The present embodiment is different from the first embodiment in that:
in the step (1) and the step (2), the temperature is 140 ℃, the air pressure is 85KPa, and the mass ratio of the PVC paste to the silicic acid gel is 8:1;
in step (3), molding is performed at a temperature of 92 ℃. The remainder was the same as in the first embodiment.
Example III
The present embodiment is different from the first embodiment in that:
in the step (1) and the step (2), the temperature is 150 ℃, the air pressure is 70KPa, and the mass ratio of the PVC paste to the silicic acid gel is 9:1;
in step (3), molding is performed at a temperature of 95 ℃. The remainder was the same as in the first embodiment.
The raw material prepared in the step (2) in the above example was first subjected to a flexibility test, and then a biopsy was performed on the prepared drip needle.
The raw material detection method comprises the following steps: sampling the raw material prepared in the step (2) for 5 times randomly, taking the sampled raw material as 5 independent samples, inserting a pin of the A-type Shore hardness tester into the sample, reading the reading of the A-type Shore hardness tester, taking the reading of the A-type Shore hardness tester as a detection value of the measurement, continuously measuring each sample for 3 times, taking the average value of the 3 detection values as the detection value of the sample, taking the average value of the detection values of the 5 samples as the hardness value of the raw material, and taking the hardness value of the raw material as qualified in the range of 70-85 HA.
The hardness values of the raw materials of example one, example two and example three were measured according to the above method and were 72.63HA, 76.81 HA and 81.94 HA in this order.
In vivo experimental method: the qualified raw materials are manufactured into a flexible needle tube 2, and the flexible needle tube is produced into a instillation needle, and the living experiment is carried out on a white mouse by using the method for simulating human instillation: the dripping of the utility model is used for intravenous injection of normal saline to mice, a puncture needle head 1 is penetrated into veins of the mice, a handle 4 is stuck on skin of the mice, the mice are placed into a cage so as to be free to move, and whether the mice are in needle removal, needle bulging and other puncture phenomena of veins are checked after 10 minutes.
The drip needles of the first, second and third embodiments were tested sequentially on 3 groups of mice according to the above method, 20 mice per group were correctly penetrated by the drip needles, and no needle fall off, needle bulging or other puncture of vein occurred. The instillation needle with the structure can be used normally.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (9)
1. A flexible needle cannula, characterized by: the raw materials are composed of PVC and silicic acid gel, and the mass ratio of the PVC to the silicic acid gel is 7.5-9:1;
the flexible needle tube is manufactured through the following steps:
(1) Preheating: preheating PVC into paste to prepare PVC paste;
(2) The reaction: mixing the PVC paste prepared in the step (1) with silicic acid gel under a high-temperature low-pressure environment to prepare raw materials;
(3) And (3) forming: extruding and molding the raw material prepared in the step (2) to prepare a flexible needle tube;
the step (1) is carried out in a high-temperature low-pressure environment, and the high-temperature low-pressure environment in the step (1) and the step (2) is 125-150 ℃ and 70-100 KPa.
2. A flexible needle cannula according to claim 1, wherein: the mass ratio of PVC to silicic acid gel is 8:1.
3. A preparation method of a flexible needle tube is characterized in that: is prepared through the following steps:
(1) Preheating: preheating PVC into paste to prepare PVC paste;
(2) The reaction: mixing the PVC paste prepared in the step (1) with silicic acid gel under a high-temperature low-pressure environment to prepare raw materials; the mass ratio of the PVC paste to the silicic acid gel is 7.5-9:1;
(3) And (3) forming: extruding and molding the raw material prepared in the step (2) to prepare a flexible needle tube;
the step (1) is carried out in a high-temperature low-pressure environment, and the high-temperature low-pressure environment in the step (1) and the step (2) is 125-150 ℃ and 70-100 KPa.
4. A method of preparing a flexible needle cannula according to claim 3, wherein: step (3) is performed in an environment in which a desiccant is present.
5. The method for preparing the flexible needle tube according to claim 4, wherein: the step (3) is carried out in a space with the cobalt chloride being sealed and anhydrous at a temperature of 90-95 ℃.
6. A method of manufacturing a flexible needle cannula according to any one of claims 3 to 5, wherein: in the step (2), the mass ratio of the PVC paste to the silicic acid gel is 8:1.
7. The utility model provides a flexible instillation needle, includes the needle file, is equipped with instillation needle body on the needle file, its characterized in that: the instillation needle body comprises a flexible needle tube and a puncture needle head, the rear end of the flexible needle tube is fixed on a needle seat, the puncture needle head is fixed at the front end of the flexible needle tube, and the flexible needle tube is manufactured by the manufacturing method of any one of claims 3 to 6.
8. The flexible drip needle of claim 7, wherein: the length of the puncture needle head is 12-18 mm.
9. The flexible drip needle of claim 8, wherein: a handle is fixed on the needle seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110257029.8A CN112807522B (en) | 2021-03-10 | 2021-03-10 | Flexible needle tube, preparation method thereof and flexible instillation needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110257029.8A CN112807522B (en) | 2021-03-10 | 2021-03-10 | Flexible needle tube, preparation method thereof and flexible instillation needle |
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| Publication Number | Publication Date |
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| CN112807522A CN112807522A (en) | 2021-05-18 |
| CN112807522B true CN112807522B (en) | 2023-05-23 |
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| CN202110257029.8A Active CN112807522B (en) | 2021-03-10 | 2021-03-10 | Flexible needle tube, preparation method thereof and flexible instillation needle |
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Denomination of invention: A flexible needle tube and its preparation method, flexible drip needle Effective date of registration: 20231212 Granted publication date: 20230523 Pledgee: Industrial and Commercial Bank of China Limited Zibo Boshan sub branch Pledgor: Shandong Mengyou New Material Technology Co.,Ltd. Registration number: Y2023980070935 |