CN113041442A - Sleeve type multifunctional puncture-proof remaining needle - Google Patents
Sleeve type multifunctional puncture-proof remaining needle Download PDFInfo
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- CN113041442A CN113041442A CN202110157509.7A CN202110157509A CN113041442A CN 113041442 A CN113041442 A CN 113041442A CN 202110157509 A CN202110157509 A CN 202110157509A CN 113041442 A CN113041442 A CN 113041442A
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- Prior art keywords
- needle
- puncture
- indwelling
- needle seat
- outer sleeve
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/15074—Needle sets comprising wings, e.g. butterfly type, for ease of handling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
-
- 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
Abstract
The invention discloses a sleeve type multifunctional puncture-proof indwelling needle which comprises an indwelling hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged. This needle is kept somewhere in multi-functional puncture of preventing of bushing type on simple structure, production and convenient to use, and low-cost facilitate promotion's basis, can realize setting up axially movable's the inner catheter that is used for liquid transport in the outer tube that the flexibility can be buckled, the connection keeps somewhere the hose on the outer tube, the puncture needle of connection puncture on the inner catheter, the steel needle does not extract and hides and receive in the outer tube after impaling, but medical devices such as injection, infusion and blood sampling direct connection inner catheter operate.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a sleeve type multifunctional puncture-proof remaining needle.
Background
The indwelling needle comprises an infusion hose which is indwelling in a blood vessel, a needle seat which fixes the infusion hose so as to be convenient to hold, and a puncture needle which is inserted in the infusion hose and used for guiding the infusion hose to enter the blood vessel. The indwelling needle is divided into a Y-shaped indwelling needle and a straight indwelling needle according to different structures and different infusion directions after puncture. In clinical care, the indwelling needle is widely used, and can be repeatedly used for transfusion, so that a patient is prevented from suffering from repeated puncture. However, the existing indwelling needle has a plurality of defects, which are typically represented as: (1) the function is single, and the Y-shaped infusion can only be used for transfusion and can not be used for blood sampling; although the straight type is available, when the needle is withdrawn, the blood vessel is pressed to prevent blood from overflowing, and then devices such as a connector and the like are quickly connected, so that the operation requirement is high; (2) the puncture-proof safety is low, the puncture-proof device is easy to puncture and stick to cause blood-borne disease infection when in use, although a few puncture-proof products exist, the puncture-proof effect is not good, or the structure and the process of the puncture-proof device are complex, the production cost is high, and the large-scale popularization and use are not facilitated; (3) the travelling comfort is poor, the sheath is of a hard structure, and the sheath needs to be attached and fixed on the body of a patient by an adhesive tape when being kept, so that the patient is very uncomfortable.
Therefore, the indwelling needle which has the functions of infusion and blood sampling, high puncture-proof safety and can improve the use comfort of a patient has extremely high application and market values on the premise of ensuring simple structure, convenient use and low cost.
Disclosure of Invention
Aiming at the defects and application requirements of the prior art, the invention aims to provide a sleeve type multifunctional puncture-proof indwelling needle which can realize that an inner catheter which can axially move and is used for conveying liquid is arranged in a flexible and bendable outer sleeve on the basis of simple structure, convenient production and use, low cost and convenient popularization, an indwelling hose is connected on the outer sleeve, a puncture needle for puncture is connected on the inner catheter, the steel needle is hidden in the outer sleeve without being pulled out after puncture, and medical devices such as injection, transfusion, blood sampling and the like can be directly connected with the inner catheter for operation.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a multi-functional puncture-proof of bushing type indwelling needle which characterized in that: comprises a retention hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged; wherein the content of the first and second substances,
the outer needle base (5) is provided with a through hole penetrating through the front end and the rear end at the middle shaft, and the rear end part of the through hole is provided with a tapered hole (51) structure with a narrow front part and a wide rear part; the indwelling hose (3) is fixedly connected with the outer needle seat (5) in a way that the rear end part of the indwelling hose is embedded into the through hole at the front end part of the outer needle seat (5); the outer needle base (5) is fixedly connected with the outer sleeve (1) in a way that the rear end part of the outer needle base is embedded into the front end part of the outer sleeve (1); the rear end of the outer sleeve (1) is provided with a narrow sleeve section (300) with the inner diameter gradually reduced;
the front end part of the inner needle seat (6) is provided with a conical table (61) structure matched with the conical hole (51), and the inner needle seat (6) is provided with a through hole penetrating through the front end and the rear end at the middle shaft; the puncture needle (4) is fixedly connected with the inner needle seat (6) in a way that the rear end part of the puncture needle is embedded into the through hole at the front end part of the inner needle seat (6); the inner needle seat (6) is fixedly connected with the inner catheter (2) in a mode that the rear end part of the inner needle seat is embedded into the front end part of the inner catheter (2), and the embedding of the inner needle seat (6) enables the front end part of the inner catheter (2) to be expanded to form a radial expansion section (100); the inner needle seat (6) is also provided with a flow guide hole (64) for communicating the inner cavity of the needle seat with the outside;
the puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are fixedly connected into a whole are arranged in a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1) in an inserting way and can move in the cavity along the axial direction;
the outer diameter of the radial expansion section (100) is matched with the inner diameter of the outer sleeve (1) so that the outer peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1); the axial length of the inner catheter (2) is greater than that of the outer sleeve (1), and the outer diameter of the radial expansion section (100) of the inner catheter (2) is greater than the inner diameter of the narrow sleeve section (300) of the outer sleeve (1);
in an initial state, the front end surface of the inner needle seat (6) including the conical table (61) is attached to the rear end surface of the outer needle seat (5) including the conical hole (51), the puncturing needle (4) penetrates through the indwelling hose (3) and the needle point is exposed out of the indwelling hose (3).
In the present invention, unless otherwise specified, the front end refers to the end of the piercing needle (4) to which the tip is directed, and the rear end refers to the opposite end.
The multifunctional puncture-proof remaining needle product with the technical effects can be obtained on the premise of keeping low cost by arranging the sleeve structure with the inner needle base and the outer needle base and assisting the specific size design.
In the initial state, the front end face of the inner needle seat (6) and the rear end face of the outer needle seat (5), particularly the conical table (61) and the conical hole (51) which are matched in shape and size, are tightly attached to each other, and locking and fixing between the inner tube and the outer tube are realized under the action of air pressure difference, so that supporting force is provided for puncture of the puncture needle (4), and the phenomenon of needle withdrawal caused by resistance force when the puncture needle (4) is punctured is prevented. After the puncture needle (4) punctures the skin and carries the indwelling hose (3) to enter the blood vessel, the puncture needle (4), the cavity of the inner needle seat (6) and the inner catheter (2) form a liquid flow passage, and the purpose of injection or blood sampling can be smoothly realized by connecting an injection or blood sampling device at the rear end of the inner catheter (2).
Based on the purpose of indwelling transfusion, after the vascular puncture operation is completed, the puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are fixedly connected integrally need to be moved backwards along the axial direction until the radial expansion section (100) of the inner catheter (2) realizes interference locking and fixing at the narrow casing section (300) at the rear end of the outer casing (1), the puncture needle (4) returns to the inside of the cavity of the outer casing (1) from the indwelling hose (3), at the moment, the inner catheter (2), the cavity of the inner needle seat (6), the flow guide hole (64), the front section cavity (200) between the inner needle seat and the outer casing (1) and the indwelling hose (3) form a liquid flow channel I, and the inner catheter (2), the cavity of the inner needle seat (6), the puncture needle (4), the front section cavity (200) and the indwelling hose (3) form a liquid flow channel II. The infusion device is connected at the rear end of the inner catheter (2), so that the infusion can be smoothly carried out, and the liquid can simultaneously flow in the two flow channels.
The invention relates to a sleeve type multifunctional puncture-proof remaining needle which is an improved type of the existing remaining needle. The specific dimensions and connection design of the various components, such as the outer diameter of the piercing needle (4) should match the inner diameter of the indwelling hose (3), the axial length of the outer cannula (1) should be greater than the length of the piercing needle (4), etc., are readily determinable by those skilled in the art, knowing the overall construction and method of use of the invention as described hereinabove.
As a preferred embodiment, the matching taper of the tapered hole (51) and the tapered table (61) is between 4-10 degrees.
In the sleeve type multifunctional puncture-proof remaining needle, the outer diameter of the radial expansion section (100) of the inner catheter (2) is matched with the inner diameter of the outer sleeve (1) so that the peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1). The close fit kept at all times forms a closed partition, so that a gap between the outer peripheral surface of the radial expansion section (100) and the inner surface of the outer sleeve (1) can be avoided, and liquid in the front cavity is prevented from entering the cavity of the outer sleeve (1) at the rear end of the fit part.
As a preferred embodiment, the axial middle part of the inner needle seat (6) is provided with an annular bulge (62) in the radial direction, and the diameter of the annular bulge (62) is matched with the outer diameter of the radial expansion section (100) and the inner diameter of the outer sleeve (1). The arrangement of the annular bulge (62) can ensure that the front end part of the inner needle seat (6) and the rear end part of the outer needle seat (5) are better attached in the initial state, and meanwhile, the positioning of the rear end part of the inner needle seat (6) when the inner catheter (2) is embedded is facilitated, and the sealing connection between the inner needle seat and the outer sleeve (1) is also facilitated to be enhanced.
As a preferred embodiment, the inner needle seat (6) is provided with an internal flow cavity (63) at the rear section of the through hole, and the diameter of the internal flow cavity (63) is larger than that of the through hole of the inner needle seat (6). Meanwhile, the diversion holes (64) are arranged in the radial direction, one end of each diversion hole is communicated with the inner flow cavity (63) of the inner needle base (6), and the other end of each diversion hole extends to the side peripheral surface of the conical table (61).
In the sleeve type multifunctional puncture-proof remaining needle, the inner diameter of a narrow sleeve section (300) of an outer sleeve (1) is smaller than the outer diameter of a radial expansion section (100) of an inner catheter (2). The design enables the narrow sleeve section (300) of the outer sleeve (1) to form a limiting structure, the inner catheter (2) can be prevented from being separated from the outer sleeve (1) during axial movement, and the radial expansion section (100) of the puncture needle (4), the inner needle seat (6) and the inner catheter (2) is ensured to be always positioned inside a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1). In the indwelling transfusion state, the radial expansion section (100) of the inner catheter (2) is locked and fixed at the narrow sleeve section (300) of the outer sleeve (1) in an interference fit mode. As a preferred embodiment, corresponding marks are arranged on the pipe wall of the radial expansion section (100) and the pipe wall of the narrow sleeve section (300) so as to mark the final position which needs to be reached when the radial expansion section (100) axially moves backwards, and the locking fixation is not in place or the locking fixation is too violent. As an example of the mark, a colored identification line for alignment purpose may be used.
Suitably, the internal diameter of rear end opening (12) of outer tube (1) and the external diameter size phase-match of inner tube (2), this kind of design is favorable to strengthening limit function, and radial stability (avoiding angle skew) when promoting inner tube (2) axial displacement can also avoid the cavity between inner tube (2) and outer tube (1) to be polluted by external pollutant.
In the telescopic multi-functional puncture-preventing indwelling needle of the present invention, the material of each component should meet the medical standards, which are easily conceived and determined by those skilled in the art, for example, the indwelling hose (3) may be made of FEP material, the puncturing needle (4) may be made of metal material, and the inner needle holder (6) and the outer needle holder (5) may be made of rigid plastic. From the viewpoint of enhancing the comfort of the patient, the outer tube (1) and the inner tube (2) are preferably made of a soft plastic.
As a preferred embodiment, the outer sleeve (1) is provided with a wing part (11) for holding at the outer periphery side of the front end part, so as to be convenient for the operation of medical staff; in an initial state, the section of the inner conduit (2) exposed out of the outer sleeve (1) is provided with a liquid stopping clamp; the rear end of the inner conduit (2) is connected with a joint (21) so as to be convenient for connecting an injection, blood sampling or transfusion device.
Compared with the prior art, the invention has the following beneficial effects:
(1) has multiple functions of injection, blood sampling and transfusion. After the puncture needle (4) punctures the skin and carries the indwelling hose (3) to enter the blood vessel, the puncture needle (4), the cavity of the inner needle seat (6) and the inner catheter (2) form a liquid flow passage. At this time, blood collection can be performed by connecting a blood collection device to the joint (21) through the flow channel, or by connecting an injection device to perform an injection operation in the reverse direction through the joint (21), the inner catheter (2), the cavity of the inner needle holder (6), and the puncture needle (4). During transfusion operation, the puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are fixedly connected into a whole are pulled backwards along the axial direction to form a first liquid flow passage and a second liquid flow passage. By connecting the infusion set at the connector (21), the infusion operation can be performed.
(2) The puncture-proof safety is high. The puncture needle (4) does not need to be separated and detached after the indwelling operation, but returns to the inside of the cavity of the outer sleeve (1), so that medical personnel can be effectively prevented from being punctured, the operation is convenient, and the difficulty in learning and handling is low.
(3) Has improved use comfort. The outer sleeve (1) is soft and transparent, the blood return state of the puncture needle (4) can be observed, and when the puncture needle is kept in place, the outer sleeve (1) can be bent and attached to the skin, so that the body of a patient feels more comfortable.
(4) Simple structure, easy production and use, low cost and easy popularization.
Drawings
FIG. 1 is a schematic sectional view of an initial state of a multi-functional puncture-proof indwelling needle of the cannula type according to the embodiment;
FIG. 2 is an enlarged view of a portion of the needle hub of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the outer member;
FIG. 4 is a schematic cross-sectional view of the inner member;
FIG. 5 is a schematic sectional view of the infusion apparatus;
FIG. 6 is an enlarged partial schematic view of the rear end portion of the outer sleeve of FIG. 5;
FIG. 7 is a pictorial view of the telescopic multi-functional puncture preventing indwelling needle (equipped with a liquid stopping clip) according to the embodiment;
FIG. 8 is a schematic view showing the appearance effect of the skin-adhering portion in the state of infusion.
The reference numerals in the figures have the following meanings: 1-outer sleeve; 11-a wing; 12-an opening; 2-an inner conduit; 21-a linker; 3-a retention hose; 4-puncturing needle; 5-outer needle base; 51-a tapered hole; 6-inner needle seat; 61-a conical table; 62-annular protrusion; 63-an internal flow lumen; 64-flow guide holes; 100-a radially expanded section; 200-a front side section cavity; 300-narrow casing section.
Detailed Description
The invention is described in further detail below with reference to the figures and examples, which should not be construed as limiting the scope of the invention.
Examples
A sleeve type multifunctional puncture-proof remaining needle comprises a remaining hose 3, an outer needle seat 5, an outer sleeve 1, a puncture needle 4, an inner needle seat 6 and an inner catheter 2 which are coaxially arranged.
The outer tube 1 is a hollow circular tube made of soft transparent plastic and having a front end and a rear end penetrating therethrough, and has wing portions 11 for grasping provided symmetrically on the outer periphery side of the front end portion and a narrow tube portion 300 having a gradually decreasing inner diameter provided at the rear end. The outer needle base 5 is a columnar structure made of hard plastics, a through hole penetrating through the front end and the rear end is formed in the middle shaft, a conical hole 51 with a narrow front part and a wide rear part is formed in the rear end of the through hole, and the taper is 6 degrees. The indwelling hose 3 is a hollow circular tube made of FEP material, and is fixedly connected to the outer needle holder 5 in such a manner that the rear end portion thereof is inserted into the through hole at the front end portion of the outer needle holder 5, and is communicated with the conical hole 51. The outer hub 5 is fixedly connected to the outer tube 1 such that the rear end thereof is fitted into the front end of the outer tube 1.
The inner conduit 2 is a hollow round tube made of soft transparent plastic and with a through front end and a through rear end, the outer diameter of the inner conduit is matched with the inner diameter of the opening 12 at the rear end of the outer sleeve 1, and the axial length of the inner conduit is larger than that of the outer sleeve 1. The inner needle seat 6 is a columnar structure made of hard plastics, but the front end part of the inner needle seat is provided with a conical table 61 matched with the shape and the size of the conical hole 51 so as to ensure that the conical hole 51 and the conical table 61 can be attached seamlessly; the axial middle part of the inner needle seat 6 is provided with an annular bulge 62 in the radial direction, and the diameter of the annular bulge is matched with the inner diameter of the outer sleeve 1. The inner needle base 6 is provided with a through hole penetrating through the front end and the rear end at the middle shaft, and the rear section of the through hole is provided with an inner flow cavity 63 with a larger diameter; the diversion hole 64 is radially arranged on the inner needle seat 6, one end of the diversion hole is communicated with the inner flow cavity 63, and the other end of the diversion hole extends to the side peripheral surface of the conical platform 61. The puncture needle 4 is made of stainless steel, and the outer diameter is matched with the inner diameter of the indwelling hose 3. The puncture needle 4 is fixedly connected with the inner needle seat 6 in a way that the rear end part of the puncture needle is embedded into the through hole at the front end part of the inner needle seat 6, and is communicated with the inner flow cavity 63. The inner needle seat 6 is fixedly connected with the inner catheter 2 in a mode that the rear end part of the inner needle seat 6 is embedded into the front end part of the inner catheter 2 (until the annular bulge 62 is abutted against the front end port of the inner catheter 2), the embedding of the inner needle seat 6 enables the pipe wall of the front end part of the inner catheter 2 to be expanded to form a radial expansion section 100, and the outer diameter of the radial expansion section 100 is matched with the diameter of the annular bulge 62 and the inner diameter of the outer sleeve 1. The rear end of the inner catheter 2 is connected to a connector 21.
The puncture needle 4, the inner needle seat 6 and the inner catheter 2 which are fixedly connected integrally are inserted into a cavity formed by the indwelling hose 3, the outer needle seat 5 and the outer sleeve 1 and can move along the axial direction in the cavity. The outer peripheral surfaces of the annular projection 62 and the radially expanding section 100 are constantly held in close contact with the inner surface of the outer sleeve 1.
As shown in fig. 1, in the initial state, the conical frustum 61 is embedded in the conical hole 51, the front end surface of the inner needle base 6 including the conical frustum 61 and the rear end surface of the outer needle base 5 including the conical hole 51 are seamlessly attached to each other, the outer port of the diversion hole 64 is blocked by the conical hole 51, the puncturing needle 4 passes through the indwelling hose 3, and the needle tip is exposed out of the indwelling hose 3.
In order to more intuitively and clearly show the structure of the telescopic multifunctional puncture-proof indwelling needle of the present invention, fig. 2 is a partially enlarged view showing the joint of the inner needle hub and the outer needle hub in fig. 1, fig. 3 is a schematic sectional view showing an external member composed of the indwelling hose 3, the outer needle hub 5 and the outer cannula 1, and fig. 4 is a schematic sectional view showing an internal member composed of the puncture needle 4, the inner needle hub 6 and the inner catheter 2.
The initial state is the product standby state, and the puncture needle 4, the inner flow cavity 63, the inner catheter 2 and the connector 21 are sequentially communicated to form a liquid flow channel, so that the puncture blood sampling operation can be directly performed, or the puncture injection and the indwelling transfusion operation can be performed after the air is exhausted. When blood is collected, air in the flow channel is discharged from the joint 21 along blood flow; during the air discharge, the air in the flow channel is discharged from the needle tip of the puncture needle 4 along the flow direction of the liquid medicine. In the process of puncturing the puncture needle 4 into the blood vessel, the inner needle seat 6 and the outer needle seat 5 are tightly attached, and are in a locking and fixing state under the action of air pressure difference, so that supporting force is provided for the puncturing process. After the puncture needle 4 punctures the skin and enters the blood vessel with the indwelling hose 3, the injection or blood sampling device connected with the rear end of the inner catheter 2 can directly perform the injection or blood sampling operation, or the infusion operation can be performed by being matched with the infusion device after the puncture needle is switched to the indwelling infusion state.
To switch to an indwelling infusion state, the general procedure involves: the wing part 11 is held by one hand, the inner catheter 2 is pulled towards the rear side by one hand, the locking of the inner needle seat 6 and the outer needle seat 5 is released, the inner catheter 2 carries the inner needle seat 6 and the puncture needle 4 to move towards the rear side of the outer sleeve 1 until the radial expansion section 100 of the inner catheter 2 realizes interference locking and fixing at the narrow sleeve section 300 at the rear end of the outer sleeve 1, and the puncture needle 4 is completely withdrawn from the indwelling hose 3 to the inside of the cavity of the outer sleeve 1.
At the moment when the conical platform 61 is separated from the conical hole 51, the flow guide hole 64 is communicated with the inner cavity of the outer sleeve 1, and liquid can flow into the front side section cavity 200 of the outer sleeve 1 from the inner flow cavity 63 and the flow guide hole 64. The cavity of the front side section cavity 200 is gradually enlarged along with the backward movement of the inner conduit 2, and the liquid continuously flows into and fills the cavity from the diversion hole 64. FIG. 5 is a schematic sectional view showing the state of an indwelling infusion. Under the state, the liquid flows through the channel of the inner catheter 2, the inner flow cavity 63, the diversion hole 64, the front section cavity 200 and the indwelling hose 3 and the channel of the inner catheter 2, the inner flow cavity 63, the puncture needle 4, the front section cavity 200 and the indwelling hose 3 simultaneously, so that the flow rate meets the requirement of indwelling transfusion.
Fig. 6 is an enlarged partial view of the rear end portion of the outer sleeve of fig. 5.
Application examples
Fig. 7 is a view showing an object of the telescopic multifunctional puncture-proof indwelling needle having the structure shown in fig. 1, which is provided with a liquid stopping clip at a section of the inner catheter 2 exposed outside the outer catheter 1. The application of the cannula type multifunctional puncture-proof indwelling needle of the invention in transfusion, blood collection and injection will be described below with reference to an entity in fig. 7.
1. Transfusion system
The cannula type multifunctional puncture-proof remaining needle is communicated with an infusion apparatus through a connector 21 at the rear end of the inner catheter 2, and after the exhaust operation is carried out by using the liquid medicine, the wing part 11 is held by hand to carry out the blood vessel puncture. After the blood return in the inner catheter 2 is seen through the transparent outer sleeve 1 and the inner catheter 2, the inner catheter 2 is pulled to enable the puncture needle 4 to slowly withdraw from the indwelling hose 3 until the radial expansion section 100 of the inner catheter 2 is fixed in an interference locking manner at the narrow sleeve section 300 at the rear end of the outer sleeve 1, and meanwhile, the puncture needle 4 is completely withdrawn from the indwelling hose 3 to the inside of the cavity of the outer sleeve 1. The indwelling infusion is then performed by fixing the outer cannula 1 at the wings 11 and the inner catheter 2 adjacent the opening 12 at the rear end of the outer cannula 1 (this is an optional operation, fixing the inner catheter 2 helps to prevent inadvertent operation and thus breaks the locking fixation with the outer cannula 1).
Fig. 8 is a schematic view showing the appearance effect of the part attached to the skin in the infusion state.
2. Injection of drugs
The cannula type multifunctional puncture-proof remaining needle is communicated with a syringe through a joint 21 at the rear end of the inner catheter 2, and after the exhaust operation is performed by using the liquid medicine, the blood vessel puncture is performed by holding the wing part 11 by hand. After the blood return in the inner catheter 2 is seen through the transparent outer sleeve 1 and the inner catheter 2, the injection operation can be carried out.
After injection is completed, the liquid stopping clip is closed, the injector is detached, the sleeve type multifunctional puncture-proof remaining needle is connected with the transfusion device after air exhaust through the joint 21, then the liquid stopping clip is opened, and the inner catheter 2 is pulled and fixed according to the description in the step 1 and transfusion, and then the state of remaining transfusion can be switched.
3. Blood sampling
The sleeve type multifunctional puncture-proof remaining needle is communicated with a blood sampling device through a connector 21 at the rear end of the inner catheter 2, the wing part 11 is held by hand to perform blood vessel puncture, and then blood sampling is performed according to conventional operation.
After blood collection is completed, the liquid stopping clamp is closed, the blood collecting device is detached, the cannula type multifunctional puncture-proof remaining needle is connected with the transfusion device after air exhaust through the connector 21, then the liquid stopping clamp is opened, and the inner catheter 2 is pulled and fixed according to the description in the step 1 and transfusion, so that the remaining transfusion state can be switched.
Claims (10)
1. The utility model provides a multi-functional puncture-proof of bushing type indwelling needle which characterized in that: comprises a retention hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged; wherein the content of the first and second substances,
the outer needle base (5) is provided with a through hole penetrating through the front end and the rear end at the middle shaft, and the rear end part of the through hole is provided with a tapered hole (51) structure with a narrow front part and a wide rear part; the indwelling hose (3) is fixedly connected with the outer needle seat (5) in a way that the rear end part of the indwelling hose is embedded into the through hole at the front end part of the outer needle seat (5); the outer needle base (5) is fixedly connected with the outer sleeve (1) in a way that the rear end part of the outer needle base is embedded into the front end part of the outer sleeve (1); the rear end of the outer sleeve (1) is provided with a narrow sleeve section (300) with the inner diameter gradually reduced;
the front end part of the inner needle seat (6) is provided with a conical table (61) structure matched with the conical hole (51), and the inner needle seat (6) is provided with a through hole penetrating through the front end and the rear end at the middle shaft; the puncture needle (4) is fixedly connected with the inner needle seat (6) in a way that the rear end part of the puncture needle is embedded into the through hole at the front end part of the inner needle seat (6); the inner needle seat (6) is fixedly connected with the inner catheter (2) in a mode that the rear end part of the inner needle seat is embedded into the front end part of the inner catheter (2), and the embedding of the inner needle seat (6) enables the front end part of the inner catheter (2) to be expanded to form a radial expansion section (100); the inner needle seat (6) is also provided with a flow guide hole (64) for communicating the inner cavity of the needle seat with the outside;
the puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are fixedly connected into a whole are arranged in a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1) in an inserting way and can move in the cavity along the axial direction;
the outer diameter of the radial expansion section (100) is matched with the inner diameter of the outer sleeve (1) so that the outer peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1); the axial length of the inner catheter (2) is greater than that of the outer sleeve (1), and the outer diameter of the radial expansion section (100) of the inner catheter (2) is greater than the inner diameter of the narrow sleeve section (300) of the outer sleeve (1);
in an initial state, the front end surface of the inner needle seat (6) including the conical table (61) is attached to the rear end surface of the outer needle seat (5) including the conical hole (51), the puncturing needle (4) penetrates through the indwelling hose (3) and the needle point is exposed out of the indwelling hose (3).
2. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the matching conicity of the tapered hole (51) and the tapered platform (61) is between 4 and 10 degrees.
3. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the axial middle part of the inner needle base (6) is provided with an annular bulge (62) in the radial direction, and the diameter of the annular bulge (62) is matched with the outer diameter of the radial expansion section (100) and the inner diameter of the outer sleeve (1).
4. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the rear section of the through hole of the inner needle seat (6) is provided with an internal flow cavity (63), and the diameter of the internal flow cavity (63) is larger than that of the through hole of the inner needle seat (6).
5. The telescopic multi-functional puncture-proof indwelling needle according to claim 4, wherein: the diversion holes (64) are arranged in the radial direction, one end of each diversion hole is communicated with the inner flow cavity (63) of the inner needle base (6), and the other end of each diversion hole extends to the lateral periphery of the conical table (61).
6. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: corresponding marks are arranged on the pipe wall of the radial expansion section (100) and the pipe wall of the narrow sleeve section (300) so as to mark the final position which is required to be reached by the backward axial movement of the radial expansion section (100).
7. The telescopic multi-functional puncture-proof indwelling needle according to claim 6, wherein: the mark is a colored identification line for the purpose of alignment.
8. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the inner diameter of the rear end opening (12) of the outer sleeve (1) is matched with the outer diameter of the inner conduit (2).
9. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the outer sleeve (1) and the inner conduit (2) are both made of transparent soft plastics.
10. The telescopic multifunctional puncture-proof indwelling needle according to claim 1, wherein: the outer sleeve (1) is provided with a wing part (11) for holding on the outer periphery side of the front end part; in an initial state, the section of the inner conduit (2) exposed out of the outer sleeve (1) is provided with a liquid stopping clamp; the rear end of the inner conduit (2) is connected with a joint (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157509.7A CN113041442A (en) | 2021-02-04 | 2021-02-04 | Sleeve type multifunctional puncture-proof remaining needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157509.7A CN113041442A (en) | 2021-02-04 | 2021-02-04 | Sleeve type multifunctional puncture-proof remaining needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113041442A true CN113041442A (en) | 2021-06-29 |
Family
ID=76508882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110157509.7A Pending CN113041442A (en) | 2021-02-04 | 2021-02-04 | Sleeve type multifunctional puncture-proof remaining needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113041442A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2638760Y (en) * | 2003-08-04 | 2004-09-08 | 邹德威 | Dilator for forming cavity in pyramid |
| CN209316694U (en) * | 2018-06-29 | 2019-08-30 | 广东先来医疗器械有限公司 | A kind of hose safety transfusion needle |
-
2021
- 2021-02-04 CN CN202110157509.7A patent/CN113041442A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2638760Y (en) * | 2003-08-04 | 2004-09-08 | 邹德威 | Dilator for forming cavity in pyramid |
| CN209316694U (en) * | 2018-06-29 | 2019-08-30 | 广东先来医疗器械有限公司 | A kind of hose safety transfusion needle |
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Address after: No. 679 Guangyuan Road, Longtou Town, Potou District, Zhanjiang City, Guangdong Province, 524001 Applicant after: Zhanjiang Jianliyuan Medical Supplies Co.,Ltd. Address before: 524001 No.26, middle Renmin Avenue, Zhanjiang City, Guangdong Province Applicant before: ZHANJIANG JIANLIYUAN MEDICAL PRODUCTS Co.,Ltd. |