CN110075382B - Multifunctional non-PVC material transfusion system - Google Patents

Multifunctional non-PVC material transfusion system Download PDF

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Publication number
CN110075382B
CN110075382B CN201910455241.8A CN201910455241A CN110075382B CN 110075382 B CN110075382 B CN 110075382B CN 201910455241 A CN201910455241 A CN 201910455241A CN 110075382 B CN110075382 B CN 110075382B
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CN
China
Prior art keywords
needle
infusion
sealing
conical joint
joint
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CN201910455241.8A
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Chinese (zh)
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CN110075382A (en
Inventor
李慎贵
苏卫东
朱磊峰
祝尔加
马建强
徐权锋
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Zhejiang Fert Medical Device Co ltd
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Zhejiang Fert Medical Device Co ltd
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Priority to CN201910455241.8A priority Critical patent/CN110075382B/en
Publication of CN110075382A publication Critical patent/CN110075382A/en
Application granted granted Critical
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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
    • 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
    • A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
    • 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
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • 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
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line
    • 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
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • 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
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • A61M2005/1657—Filter with membrane, e.g. membrane, flat sheet type infusion filter
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/02—General characteristics of the apparatus characterised by a particular materials
    • A61M2205/0216—Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses a multifunctional non-PVC material infusion apparatus, which is characterized by comprising: the infusion tube is sequentially connected with a bottle inserting needle, a dropper, a flow regulator, a Y-type injection medicine adding piece, a precise filter and a venous infusion needle in series and communicated with each other; a water stop clamp clamped on the infusion tube is arranged between the precise filter and the intravenous infusion needle; the bottle inserting needle is inserted into the bottle inserting needle protective cap, the needle body of the intravenous infusion needle is inserted into the infusion needle protective cap, and the infusion tube is made of TPU (thermoplastic polyurethane) material. Compared with the existing disposable infusion set adopting the PVC material as the infusion tube material, the TPU is adopted as the infusion tube material, and the auxiliary agent cyclohexanone and the plasticizer which are required in the PVC injection molding can be avoided, so that the influence on the treatment effect caused by the precipitation of the two components into the liquid medicine and the certain risk of injury to patients are eliminated from the source.

Description

Multifunctional non-PVC material transfusion system
Technical Field
The invention relates to the field of medical appliances, in particular to a multifunctional non-PVC material infusion apparatus.
Background
The disposable transfusion system is made of PVC material and cyclohexanone as adhesive. Because the PVC material contains a large amount of plasticizer, the plasticizer is separated out, the treatment effect is affected, and meanwhile, certain harm is caused to patients; the common transfusion system has potential safety hazards of liquid leakage, pipeline air intake, slow transfusion, bleeding of patients after accidental pull-off and leakage of liquid medicine due to structural design.
Disclosure of Invention
The invention aims to provide a multifunctional non-PVC material infusion apparatus which can avoid the problems and improve the clinical use safety.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a multi-functional non-PVC material infusion set comprising: the infusion tube is sequentially connected with a bottle inserting needle, a dropper, a flow regulator, a Y-type injection medicine adding piece, a precise filter and a venous infusion needle in series and communicated with each other; a water stop clamp clamped on the infusion tube is arranged between the precise filter and the intravenous infusion needle; the bottle inserting needle is inserted into the bottle inserting needle protective cap, the needle body of the intravenous infusion needle is inserted into the infusion needle protective cap, and the infusion tube is made of thermoplastic elastomer material without plasticizer.
Compared with the existing disposable infusion set adopting the PVC material as the infusion tube material, the invention adopts the thermoplastic elastomer (such as TPU, TPE and the like) without plasticizer as the material of the infusion tube, and can avoid the use of the plasticizer required in PVC injection molding, thereby avoiding the possibility that the plasticizer is separated out into the liquid medicine from the source and avoiding the influence of the plasticizer on the treatment effect and the harm to the body of a patient.
Further, the bottle inserting needle comprises a needle body, a transom plug for controlling the opening and closing of an air inlet channel in the needle body is arranged on the needle body, the needle body is in interference fit sealing connection with the transom plug, and the transom plug is made of PE (polyethylene). The flexible bonding between the transom plug and the bottle inserting needle is realized by utilizing the better flexibility of the material, and meanwhile, because the PE material has lower shrinkage rate compared with the traditional PVC material, the occurrence of the phenomenon of air leakage and liquid leakage caused by larger temperature change is avoided.
Further, the louver plug includes: the PE connecting column comprises a connecting section and a sealing section, wherein a baffle plate is arranged on the end face of the sealing section, and a louver hole communicated with an air passage in the connecting column is arranged on the baffle plate; a plug head is arranged at one side of the sealing cover; when in sealing, the blocking head is inserted in the air hole in an interference fit manner. PE material is little to temperature sensitivity, even external temperature change is great also can not appear great volume change, therefore can not influence the interference fit between transom plug and the contact pin, guaranteed transom plug and contact pin and air filtering membrane's leakproofness in inlet channel port department.
Further, one end of the blocking head, which is far away from the sealing cover, is provided with a flared expansion head, the expansion head is in interference sealing fit with the transom hole, and the front end of the expansion head penetrates out of the transom hole to one side, close to the connecting column, of the baffle plate. The pressure between the expansion head and the inner wall of the air window hole is increased to achieve a better sealing effect, and the air window hole is unfolded when the expansion head enters the air window hole, so that the plugging head with smaller rear diameter can conveniently enter the air window hole.
Further, the dropper is made of BS plastic, and a gas blocking piece for preventing bubbles from entering the infusion tube is arranged in the dropper bottle. The BS material has higher safety, and compared with the common PVC material, the BS material does not contain cyclohexanone and plasticizer, so that the influence on the curative effect caused by precipitation of the two harmful substances into the liquid medicine and even certain harm to patients are avoided.
Further, a precise flow control system is arranged between the flow regulator and the Y-shaped injection dosing piece, and the precise flow control system is communicated with the infusion tube in series. The precise flow control system can realize precise infusion of liquid medicine, and ensures the safety of infusion.
Further, a bidirectional hemostatic and liquid-stopping safety device is arranged between the precise filter and the intravenous infusion needle, and the bidirectional hemostatic and liquid-stopping safety device is communicated with the infusion tube in series. The bidirectional safety device can realize timely separation in the process of unexpected drawing accidents, and can realize automatic blocking of two separated ports, thereby preventing potential safety hazards of bleeding of patients and leakage of liquid medicine.
Further, the sealing piece is concavely arranged at the end part of the outer conical joint, a large pressing plate is further arranged at the end part of the outer conical joint and is propped against the end surface of the sealing piece, and a first through hole for the conducting tube to pass through is formed in the center of the large pressing plate. The large pressing plate can effectively prevent the sealing piece from being brought out of the outer conical joint by the conduction pipe, so that the sealing piece can be kept at the port of the outer conical joint after the conduction pipe is separated from the outer conical joint, and the effect of sealing the outer conical joint is achieved.
Further, the sealing piece is concavely arranged at the end part of the inner conical joint, a small pressing plate is further arranged at the end part of the inner conical joint and is propped against the end surface of the sealing piece, and a second through hole for the conducting tube to pass through is formed in the center of the small pressing plate. The small pressing plate can effectively prevent the sealing piece from being brought out of the inner conical joint by the conduction pipe, so that the sealing piece can be kept at the port of the inner conical joint after the conduction pipe is separated from the inner conical joint, and the effect of sealing the inner conical joint is achieved.
Further, one end of the outer conical joint facing the inner conical joint is provided with a sheath into which the inner conical joint can be inserted, the conducting tube is axially movably arranged in the sheath, and one end of the conducting tube, which is close to the inner conical joint after being separated from the outer conical joint, does not protrude out of the end face of the sheath. The sheath can ensure that the connecting part of the guide tube can still be hidden in the sheath after the safety device is separated, other objects cannot be rubbed to pollute the guide tube, and the subsequent re-butt joint of the bidirectional hemostatic and liquid-stopping safety device is ensured to recover transfusion.
Drawings
FIG. 1 is a schematic diagram of a multi-functional non-PVC material infusion set;
FIG. 2 is a schematic view of the construction of a vial needle;
FIG. 3 is a schematic view of the structure of the louver plug when open;
FIG. 4 is a schematic view of the structure of the louver plug when closed;
FIG. 5 is a schematic cross-sectional view of a bi-directional hemostatic and liquid-stopping safety device assembled together;
FIG. 6 is an external schematic view of a bi-directional hemostatic and liquid-stopping safety device assembled together;
FIG. 7 is a schematic view of a two-way hemostatic and liquid-stopping safety device in use;
FIG. 8 is a schematic illustration of a two-way hemostatic and liquid-stopping safety device in a disengaged state;
FIG. 9 is a schematic cross-sectional view of a bi-directional hemostatic and liquid-stopping safety device after detachment;
figure 10 is an external schematic view of a bi-directional hemostatic and liquid-stopping safety device after detachment.
Reference numerals: 1. infusion tube 2-1, bottle needle 2-1, transom plug 2-11, sealing cover 2-111, plugging head 2-112, expanding head 2-113, flange 2-114, friction flange 2-12, connecting column 2-121, connecting section 2-122, sealing section 2-123, air passage 2-13, baffle plate 2-131, transom hole 2-132, inlet 2-14, connecting belt 2-2, needle body 2-21, air inlet channel 2-22, liquid medicine channel 2-23, mounting groove 2-3, air filtering membrane 3, dropper 3-1 air resistor 4, flow regulator 5.Y type injection medicine adding piece 6, precision filter 7, intravenous infusion. Needle 8, water stop clip 9, pin cap 10, infusion needle cap 11, precision flow control system 12, bi-directional hemostatic liquid stop 12-1, outer conical connector 12-11, first groove 12-2, inner conical connector 12-21, second groove 12-22, C-shaped snap-in 12-3, sealing plate 12-31, plug hole 12-4, conduit 12-41, guide rod 12-5, large pressure plate 12-51, first through hole 12-6, small pressure plate 12-61, second through hole 12-7, jacket 12-71, limiting groove 12-72, C-shaped clamping groove 12-8, positioning concave hole 12-9, fixing column.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The multifunctional non-PVC material infusion apparatus shown in combination with fig. 1 is characterized by comprising an infusion tube 1, a bottle inserting needle 2, a dropper 3, a flow regulator 4, a Y-type injection medicine adding part 5, a precision filter 6 and an intravenous infusion needle 7 which are sequentially connected in series on the infusion tube 1 and are communicated with each other, wherein a water stop clamp 8 with a square structure is clamped on the infusion tube between the precision filter 6 and the intravenous infusion needle 7, and in a specific embodiment, the water stop clamp can be of various other structures, and meanwhile, the bottle inserting needle and the intravenous infusion needle are prevented from being polluted or hurt to a user in the use or transportation process. The bottle inserting needle 2 is inserted in the bottle inserting needle protecting cap 9, and the intravenous infusion needle is inserted in the infusion needle protecting cap 10; in order to avoid the air pressure unbalance blood backflow in the liquid medicine bottle during transfusion, a transom plug 2-1 for balancing the air pressure in the liquid medicine bottle is arranged on the bottle inserting needle; in order to prevent the precipitation of harmful substances (such as plasticizer, e.g., DEHP-dioctyl phthalate, DINP-diisononyl phthalate, and tri-isooctyl tosm-trimellitate) from affecting the therapeutic effect and even injuring the patient, the infusion tube 1 is made of thermoplastic elastomer (e.g., TPU, TPE, etc.) containing no plasticizer.
As shown in fig. 2-4, the multifunctional non-PVC material infusion apparatus is further improved in that the bottle inserting needle comprises a needle body 2-2, a transom plug 2-1 arranged on the needle body and an air filtering membrane 2-3 arranged between the transom plug and the needle body and used for only allowing air to pass through and preventing internal liquid medicine from flowing out. The air window plug is in interference fit with the needle body so as to realize non-viscose connection of the air window plug and the needle body.
Specifically, an air inlet channel 2-21 and a liquid medicine channel 2-22 are arranged in the needle body in a penetrating manner along the length direction, and a mounting groove 2-23 is arranged on the surface of the needle body, is annular, is positioned at one end of the ventilation channel and is coaxial with the ventilation channel. The transom plug 2-1 is inserted in the mounting groove in interference fit, so that the sealing connection with the needle body is realized. Meanwhile, the air filtering membrane 2-3 is coated at one end of the air inlet channel, which is close to the transom plug, the edge of the air filtering membrane 2-3 is hooped on the outer wall of the port of the ventilation channel by the inner wall of the transom plug, and external air enters the infusion bottle from the air filtering membrane, so that the balance adjustment of the internal air pressure of the infusion bottle is realized.
Preferably, as shown in fig. 3 and 4, the louver plug 2-1 includes a connecting column 2-12 made of PE and a sealing cover 2-11 made of PE, where the connecting column is of a cylindrical structure, an air passage 2-123 is axially disposed in the connecting column, two ends of the connecting column are respectively a connecting section 2-121 and a sealing section 2-122, and the connecting sections are inserted into the mounting groove 2-23 of the bottle inserting needle and realize sealing connection through interference fit between the connecting sections. The end face of the sealing section 2-121 is provided with a baffle plate 2-13 which covers the port of the air passage 2-123, the baffle plate is made of PE material, and a louver hole 2-131 coaxial with the air passage 2-123 is arranged in the baffle plate in a penetrating way. And a cylindrical blocking head 2-111 is arranged on the sealing cover 2-11, the outer diameter of the blocking head is slightly larger than the inner diameter of the air window hole 2-131, and when the blocking head is inserted into the air window hole, the blocking head is in interference fit sealing connection with the air window hole, so that the effect of sealing the air window hole is achieved.
Preferably, as shown in fig. 3 and 4, a connecting band 2-14 for connecting the sealing cover 2-11 and the connecting column 2-12 is arranged between the sealing cover and the connecting column, wherein the connecting band is made of PE material and is injection molded together with the sealing cover and the connecting column. So that the sealing cover 2-11 is not lost when the sealing cover and the blocking plate 2-13 are in a non-matching state. Meanwhile, in the embodiment, the connecting belt 2-14 is of a V-shaped structure, the edge of one end of the connecting belt is connected with the edge of the sealing cover 11, and the edge of the other end of the connecting belt is connected with the edge of the sealing section 2-122. Moreover, the V-shaped structure of the connecting belt has certain length adjusting capability and can have certain buffering effect when the sealing cover is pulled out of the blocking plate.
Preferably, as shown in fig. 3 and 4, an inlet 2-132 is arranged at a port of the louver hole 2-131 far from one end of the connecting column, and in a specific embodiment, the inlet is a 30-45-degree chamfer horn mouth, and the diameter of the inlet 2-132 is larger than that of the louver hole 2-131. Therefore, when the front end (the end far from the sealing cover) of the plugging head 2-111 enters the introducing port 2-132, the coaxial position with the louver hole can be smoothly reached under the action of the introducing port; meanwhile, because the plugging head and the louver hole are in interference fit, the plugging head is difficult to insert into the louver hole, and the leading-in port can shrink the front end of the plugging head through the caliber gradually reduced until the front end opening diameter of the plugging head is reduced to be matched with the size of the louver hole before the plugging head enters the louver hole, so that the plugging head is convenient to insert into the louver hole.
Preferably, as shown in fig. 3 and 4, an expansion head 2-112 is arranged at one end of the plugging head 2-111 far away from the sealing cover, the outer diameter of the expansion head is slightly larger than that of the plugging head, and the front end part of the expansion head penetrates out of the air hole to one side of the baffle plate close to the connecting column during sealing. The expansion head is of a horn mouth structure and is smoothly connected with the blocking head. When the expansion head enters the louver hole, the expansion head is matched with the louver hole more tightly, so that the sealing effect of the invention is effectively improved.
Preferably, as shown in fig. 3 and 4, a ring of flanges 2-113 is circumferentially provided on the outer edge of the portion of the expansion head 2-112 penetrating the air outlet aperture. When the expansion head enters the air window hole during sealing, the part of the flange 2-113, which extends out of the air window hole along with the expansion head 2-112, passes through the air window hole to the end face of the baffle plate, which is close to one side of the connecting column 2-12, and at the moment, the flange and the end face of the baffle plate are matched with each other to play a role of buckling so as to prevent the air window hole from extruding the blocking head 2-111 and the expansion head 2-112 in the air window hole.
Preferably, as shown in fig. 3 and 4, the connecting column 2-12 is in the shape of a stepped column with a gradually decreasing cross-sectional area from the sealing section 2-122 to the connecting section 2-121; in this embodiment, the connecting post has stepped reduced three-axis columns, and when the connecting post is inserted into the bottle inserting needle, the end of the connecting post with smaller cross-sectional area extends into the mounting groove 2-23 which is also matched with the connecting post and has steps, so that the guiding and positioning functions are achieved. The subsequent connection column is convenient to be matched with the installation groove through the interference sleeve.
Preferably, as shown in FIGS. 3 and 4, the end of the seal cap 2-11 opposite the connecting band 2-14 is provided with at least one friction ridge 114 to increase the pull of the plug head and expansion head out of the aperture by the user. Preferably, the friction ridges 2-114 are arranged vertically equidistant from the fingers pinching on the sealing cover.
It should be noted that, plug connection is realized between the louver plug 2-1 and the installation groove 2-23 through the connection section 2-121 of the connection column 2-12 in the louver plug. In the actual assembly process, because the connecting columns 2-12 are made of PE materials, the connecting columns have better flexibility, when the connecting sections 2-121 of the connecting columns are pressed into the bottle inserting needle, the connecting sections realize a certain necking under the action of the bottle inserting needle, and when the connecting sections 2-121 are completely pressed into the bottle inserting needle, the connecting sections are connected through the plug bush in an interference fit manner, so that the sealing effect of avoiding viscose is achieved, and the situation that the viscose is fused into liquid medicine to cause injury to patients due to the fact that the conventional connection is realized through viscose is avoided. Meanwhile, because PE has lower sensitivity to temperature, larger volume change cannot occur due to temperature change, and therefore, when the external temperature change is larger, the phenomenon that liquid leakage and air leakage are protected at the joint of the connecting column 2-12 and the bottle inserting needle cannot occur. The blocking head and the blocking plate 2-13 arranged on the sealing cover 2-11 are also made of PE materials, and the blocking head and the blocking plate are connected through an interference fit plug bush to achieve the sealing effect.
Meanwhile, when the louver plug 2-11 is pressed into the mounting groove 2-23 on the needle body, the air filtering membrane 2-3 is tightly hooped on the outer side face of the air inlet channel by the inner wall of the connecting column, so that larger friction force exists between the inner wall of the connecting column and the air filtering membrane, the friction force can drive the air filtering membrane 2-3 to move forwards along with the connecting section of the connecting column, the air filtering membrane 2-3 can be tightly covered on the end face of the air channel 2-21, and the effect of preventing the liquid medicine from leaking out from the joint of the air channel and the air filtering membrane is finally achieved.
As shown in fig. 1, the multifunctional non-PVC material infusion apparatus is further improved in that the dropper 3 is made of BS plastic which is safe and environment-friendly and does not contain plasticizer, and the plastic is flexible and transparent in texture and suitable for rapid injection molding of dropping bottles. Meanwhile, in order to prevent bubbles from entering the human body along with the liquid medicine from the dropping bottle, so that the phenomenon of air lock can be caused, an air lock 3-1 is arranged in the dropping bottle 3, and the air lock 3-1 is in a conventional structure form in the existing transfusion system.
As shown in fig. 1, a further improvement of the multifunctional non-PVC material transfusion system of the invention is that a precise flow control system 11 (the precise flow control system can also be called as a precise flow controller) is arranged between the flow regulator 4 and the Y-shaped injection medicine adding part 5, the precise flow control system is connected in series on the transfusion tube 1, and the effect of precisely controlling the medicine throughput and ensuring the transfusion safety of patients is achieved by adjusting the flow regulating button on the precise flow control system during transfusion.
As shown in fig. 5-10, a further improvement of the multifunctional non-PVC material infusion apparatus is that a bidirectional hemostatic and liquid-stopping safety device 12 is arranged between the compact filter 6 and the intravenous infusion needle 7, and the bidirectional hemostatic and liquid-stopping device is communicated with the precise filter 6 and the intravenous infusion needle 7 in series connection with the infusion tube 1.
In detail, referring to fig. 5 and 8, the bidirectional hemostatic and liquid-stopping safety device includes: an outer conical joint 12-1 having a passage therein, an inner conical joint 12-2 having a passage therein as well, and the end of the outer conical joint being opposite to the end of the inner conical joint. The opposite ends of the outer cone joint and the inner cone joint are respectively provided with a sealing sheet 12-3 capable of sealing the passage ports of the outer cone joint and the inner cone joint, and the sealing sheet has elastic deformation capability (such as rubber sheets, silica gel and the like). Meanwhile, a conducting pipe 12-4 is arranged between the outer conical joint 12-1 and the inner conical joint 12-2, two ends of the conducting pipe are conical, and when the conducting pipe is assembled, the two ends of the conducting pipe are respectively extruded out and extend into the channels of the outer conical joint 12-1 and the inner conical joint 12-2 through the inserting holes 12-31 arranged on the two sealing sheets, and the outer conical joint and the inner conical joint are conducted through the channels arranged in the conducting pipe. When the invention is drawn by external force, the conduction pipe is withdrawn from the inserting holes 12-31 of the two sealing sheets, and the two inserting holes return to the initial state (the inserting holes return to the closed state under the filling of surrounding materials) to seal the outer cone joint and the inner cone street.
Preferably, as shown in fig. 5, 6, 9 and 10, the end of the outer conical joint 12-1 is provided with a first groove 12-11 for installing the sealing piece, when the sealing piece is installed in the first groove, the end face of the sealing piece is recessed in the end face of the outer conical joint 12-1, meanwhile, a large pressing plate 12-5 is fixedly installed in the outer conical joint, one side of the large pressing plate is pressed against the end face of the sealing piece, and the sealing piece 12-3 can be kept relatively still with the outer conical joint all the time when being subjected to external drawing force. And a first through hole 12-51 for the conduction pipe to pass through 12-4 is arranged in the center of the large pressing plate.
Preferably, as shown in fig. 5, 6, 9 and 10, a second groove 12-21 for installing the sealing sheet is provided on the end of the inner cone joint 12-2, and when the sealing sheet is installed in the second groove, the end surface thereof is recessed with the end surface of the inner cone joint 12-2, and at the same time, a small pressing plate 12-6 is fixedly installed inside the inner cone joint, and one side of the small pressing plate presses the sealing sheet against the second groove, so that the sealing sheet 12-3 is prevented from being carried out by the conduit when the sealing sheet is pulled by the conduit. And a second through hole 12-61 through which the conducting pipe can pass is arranged at the center of the small pressing plate.
Preferably, as shown in fig. 5, 6, 9 and 10, at least two positioning concave holes 12-8 are uniformly distributed on the inner wall of the outer conical joint 1, and the outer edge of the large pressing plate 12-5 is provided with spoke-shaped fixed columns 12-9 with the number matched with that of the positioning concave holes 12-8, so that the positioning columns can be clamped into the positioning concave holes only by pressing the large pressing plate when the large pressing plate is required to be installed in the outer conical joint. At the same time, at least two positioning concave holes 12-8 are uniformly distributed on the inner wall of the inner conical joint 12-2, and positioning columns 12-9 which are in fit with the positioning notches 12-8 in number are uniformly distributed on the outer edge of the small pressing plate in the circumferential direction, and when the small pressing plate is required to be installed in the inner conical joint to perform pressing positioning on the sealing piece, the small pressing plate 12-6 is required to be pressed, so that the positioning columns are clamped into the corresponding positioning concave holes.
Preferably, as shown in connection with fig. 5, 6, 9 and 10, a sheath 12-7 is provided extending axially on the end face of the outer conical connector 12-1 facing the inner conical connector 12-2, the inner strength of the sheath being greater than the outer diameter of the inner conical connector, the inner conical connector being insertable into the sheath 12-7 when assembled according to the invention, and the conduit 12-4 being mounted axially displaceable within said sheath. Wherein, in order to ensure that the conduction pipe is not polluted by contact with external matters after being separated from the two sealing sheets. The end of the conduit 12-4, which is close to the inner conical joint, must not protrude from the end face of the sheath 12-13 after it is separated from the outer conical joint. In a specific embodiment, the requirement of limiting the axial movement distance of the conducting tube can be achieved in various manners, and preferably, at least two uniformly distributed limiting grooves 12-71 are circumferentially arranged on the sheath 12-7, and the limiting grooves are axially arranged along the sheath. Meanwhile, guide rods 12-41 with the number matched with that of the limiting grooves are radially arranged on the bisecting surface of the conducting tube 12-4, and the guide rods are inserted into the limiting grooves 12-71 in a sliding fit manner, so that the axial fixed distance movement of the conducting tube is realized. Meanwhile, in the specific embodiment, the moving distance of the guide pipe can be limited by arranging a limiting ring belt, a limiting bulge and the like in the sheath.
Preferably, as shown in fig. 5,6, 9 and 10, a C-shaped clamping groove 12-72 is provided at one end of the limiting groove 12-71 away from the inner conical joint, when one end of the conducting tube 12-4 passes through the inserting hole 12-31 of the sealing piece 12-3 and enters the channel of the outer conical joint 1, the upper guide rod 12-41 on the conducting tube is simultaneously clamped into the C-shaped clamping groove 12-72, so that the conducting tube is ensured not to be extruded by the sealing piece under the condition of not receiving external drawing force. Meanwhile, the end face of the inner conical joint 12-2 is provided with a C-shaped buckle 12-22 which is matched with the guide rod, when the conducting tube 12-4 passes through the sealing piece positioned on the inner conical joint and enters the channel of the inner conical joint 2, the C-shaped buckle 12-22 is clamped on the guide rod, the C-shaped buckle and the guide rod are buckled, and the C-shaped buckle and the guide rod have the effect of ensuring that the conducting tube cannot be extruded by the sealing piece under the condition of not receiving external drawing force. Meanwhile, preferably, in order to ensure that the conduction pipe can be separated from the outer conical joint 12-1 and the inner conical joint 12-2 in sequence, the binding force of the C-shaped clamping groove on the guide rod 12-41 is smaller than the binding force of the C-shaped clamping buckle 12-22 on the guide rod. When the invention receives the drawing force from the outside, the guide rod is firstly separated from the C-shaped clamping groove under the drawing of the C-shaped buckle, the rear guide pipe axially moves in the sheath and is far away from the outer conical joint 12-1, when the guide pipe moves to the set position, the guide rod 12-41 is blocked by the limiting groove and is not moving, the drawing force continues to act, the C-shaped buckle 12-22 is separated from the guide rod 12-41, and finally the separation of the guide pipe and the inner conical joint is realized. Thereby achieving the effect of two-way sealing at two ends.
Preferably, as shown in fig. 5, 6, 9 and 10, for facilitating the installation of the present invention in the disposable infusion device, the threaded connection end of the outer conical connector and the disposable infusion device adopts an internal threaded structure, and the threaded connection end of the inner conical connector and the disposable infusion device adopts an external threaded structure. Wherein the sizes of the internal thread and the external thread meet the requirements of GB/T1962.2.

Claims (1)

1. A multi-functional non-PVC material infusion set, comprising: the infusion tube is sequentially connected with a bottle inserting needle, a dropper, a flow regulator, a Y-type injection medicine adding piece, a precise filter and a venous infusion needle in series and communicated with each other; a water stop clamp clamped on the infusion tube is arranged between the precise filter and the intravenous infusion needle; the bottle inserting needle is inserted into the bottle inserting needle protective cap, the needle body of the intravenous infusion needle is inserted into the infusion needle protective cap, and the infusion tube is made of thermoplastic elastomer material without plasticizer;
The bottle inserting needle comprises a needle body, a transom plug for controlling an air inlet channel in the needle body to open and close is arranged on the needle body, the needle body is in interference fit sealing connection with the transom plug, and the transom plug is made of PE (polyethylene);
The louver plug includes: the PE connecting column comprises a connecting section and a sealing section, wherein a baffle plate is arranged on the end face of the sealing section, and a louver hole communicated with an air passage in the connecting column is arranged on the baffle plate; a plug head is arranged at one side of the sealing cover; when in sealing, the blocking head is inserted in the air hole in an interference fit manner;
The front end of the expansion head penetrates out of the transom hole to one side of the baffle plate close to the connecting column;
The dropper is made of BS plastic, and a gas blocking piece for preventing bubbles from entering the infusion tube is arranged in the dropper;
A precise flow control system is arranged between the flow regulator and the Y-shaped injection dosing piece, and the precise flow control system is communicated with the infusion tube in series;
A bidirectional hemostatic and liquid-stopping safety device is arranged between the precise filter and the intravenous infusion needle, and the bidirectional hemostatic and liquid-stopping safety device is communicated with the infusion tube in series;
The bidirectional hemostatic and liquid-stopping safety device comprises: an outer conical joint; the inner conical joint is arranged opposite to the outer conical joint; the two sealing sheets are respectively and hermetically arranged at the end parts of the matched outer conical joint and the outer conical joint; the two ends of the conduction pipe respectively pass through the splicing holes arranged on the two sealing sheets, and a channel for conducting the two ends is arranged in the conduction pipe;
The end part of the outer conical joint is provided with a first groove for installing the sealing piece, when the sealing piece is installed in the first groove, the end surface of the sealing piece is sunken in the end surface of the outer conical joint, the end part of the outer conical joint is also provided with a large pressing plate, the large pressing plate is propped against the end surface of the sealing piece, and the center of the large pressing plate is provided with a first through hole for the conducting pipe to pass through;
The end part of the inner conical joint is provided with a second groove for installing the sealing piece, when the sealing piece is installed in the second groove, the end surface of the sealing piece is sunken with the end surface of the inner conical joint, the end part of the inner conical joint is also provided with a small pressing plate, the small pressing plate is propped against the end surface of the sealing piece, and the center of the small pressing plate is provided with a second through hole for the conducting pipe to pass through;
the end, facing the inner cone joint, of the outer cone joint is provided with a sheath into which the inner cone joint can be inserted, the conducting tube is axially movably arranged in the sheath, and one end, close to the inner cone joint, of the conducting tube is not protruded out of the end face of the sheath after the conducting tube is separated from the outer cone joint;
At least two uniformly distributed limit grooves are circumferentially arranged on the sheath, and the limit grooves are axially arranged along the sheath; meanwhile, guide rods with the number matched with that of the limit grooves are radially arranged on the middle split surface of the guide pipe, and the guide rods are inserted in the limit grooves in a sliding fit manner; one end of the limiting groove, which is far away from the inner conical joint, is provided with a C-shaped clamping groove; the guide rod on the guide pipe is clamped into the C-shaped clamping groove at the same time; meanwhile, a C-shaped buckle matched with the guide rod is arranged on the end face of the inner conical joint, and the binding force of the C-shaped clamping groove to the guide rod is smaller than that of the C-shaped buckle to the guide rod.
CN201910455241.8A 2019-05-29 2019-05-29 Multifunctional non-PVC material transfusion system Active CN110075382B (en)

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CN207168538U (en) * 2017-02-22 2018-04-03 郑永强 A kind of pulse pressing tourniquet
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