CN111839686A - Indwelling needle with infusion channel with variable radial size - Google Patents
Indwelling needle with infusion channel with variable radial size Download PDFInfo
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- CN111839686A CN111839686A CN202010918983.2A CN202010918983A CN111839686A CN 111839686 A CN111839686 A CN 111839686A CN 202010918983 A CN202010918983 A CN 202010918983A CN 111839686 A CN111839686 A CN 111839686A
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- indwelling
- needle
- puncture
- indwelling catheter
- puncture needle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
- A61B17/3496—Protecting sleeves or inner probes; Retractable tips
Abstract
The invention discloses an indwelling needle with a changeable radial dimension of an infusion channel, which comprises an indwelling catheter component and a puncture needle component, wherein the indwelling catheter component comprises an indwelling base and a hollow indwelling catheter, wherein the first end of the indwelling base is communicated with the indwelling base; the puncture needle assembly comprises a puncture needle body and a puncture needle base arranged at one end of the puncture needle body; the other end of the puncture needle body is a puncture end which enters from the second end of the indwelling base and penetrates out of the orifice of the indwelling catheter; the first end of the indwelling base and the second end of the indwelling base are arranged in a penetrating way; wherein, the hollow of the indwelling catheter is an infusion channel through which infusion liquid flows in the use process of the indwelling needle, and the radial dimension of the infusion channel can be increased in the indwelling process. The indwelling needle with the infusion channel with the changeable radial size can reduce the pain of puncture of a user; during operation, the infusion channel is enlarged so that the effect of rapidly replenishing the fluid can be achieved.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an indwelling needle with an infusion channel with a variable radial size.
Background
The operation is a very common traumatic operation in clinic, bleeding generally occurs in the treatment process, the more complicated the operation, the more bleeding amount is, but the total circulating blood amount of the human body only accounts for 7% -8% of the body weight, so in order to ensure the operation safety of a patient, liquid supplement is required in the operation process to ensure the necessary circulating blood amount of the human body. The conventional complementary method is generally infusion, and generally, an indwelling needle is inserted into a blood vessel, and then liquid is infused into the body of a patient through a catheter and the indwelling needle by using the gravity action or the external force action. The size of the hole diameter of the indwelling needle is decisive for the amount of liquid to be infused into the human body per unit time.
Modern surgery, particularly the complex surgery associated with blood vessels, requires rapid fluid replenishment to achieve an out-to-in balance in the event of an emergency hemorrhage. However, the aperture of the indwelling needle in the prior art is fixed, that is, the infusion amount of the indwelling needle after the puncture is finished is fixed, so that the number of the indwelling needles generally needs to be increased in the operation to ensure that the fluid can be rapidly supplemented under the condition of heavy bleeding in the operation in order to ensure the safety of the operation, so that clinical staff needs to perform multiple times of venipuncture on a patient to ensure the number of the indwelling needles, and the pain of the patient is inevitably increased in the process of multiple times of venipuncture; particularly, for some special patients such as infants, the puncture is not successful because the condition of the body surface blood vessels is not favorable for puncturing, and the condition that the puncture is unsuccessful often occurs, and usually, 2-3 times or even more venipuncture needs to be carried out until the puncture is successful. Under the condition of more puncture times, patients are even in time, the clinical staff are more frequently operated, anxious and impatient, the efficiency is reduced, and the operation process is delayed. The larger the diameter of the indwelling needle is, the more demanding the puncture operation is on the clinical staff, the more painful the patient feels during the puncture, and the more demanding the blood vessel of the patient is (for example, the blood vessel is required to be thick, straight, elastic, superficial, without blood sinuses).
In order to solve the above technical problems, it is necessary to develop an indwelling needle with a variable aperture.
Disclosure of Invention
In order to solve the technical problems that in the clinical operation process, in order to ensure the operation safety, a plurality of indwelling needles are needed to be carried out, so that the pain of a patient is increased, the indwelling needle with a large aperture has high puncture operation requirements for clinical staff, and the pain of the patient is strong, the invention provides the indwelling needle with the infusion channel with the variable radial size.
An indwelling needle with an infusion passage with a variable radial dimension comprises an indwelling catheter component and a puncture needle component, wherein the indwelling catheter component comprises an indwelling base and a hollow indwelling catheter which is arranged at a first end of the indwelling base and communicated with the indwelling base; the puncture needle assembly comprises a puncture needle body and a puncture needle base arranged at one end of the puncture needle body; the other end of the puncture needle body is a puncture end, and the puncture end enters from the second end of the indwelling base and penetrates out of the pipe orifice of the indwelling catheter; the first end of the indwelling base and the second end of the indwelling base are arranged in a penetrating way; wherein the hollow of the indwelling catheter is an infusion channel through which infusion liquid flows during use of the indwelling needle, wherein the radial dimension of the infusion channel can be increased during indwelling.
The indwelling needle with the infusion channel with the changeable radial size can reduce the pain of puncture of a user because the infusion channel with the changeable radial size can be changed into the bigger radial size and the indwelling needle with the smaller relative size can be selected for puncture when puncture is carried out; during the operation, the infusion channel is enlarged so as to realize the function of rapidly replenishing liquid, thereby reducing the use number of the indwelling needle in the operation and reducing the puncture times.
Further, a pipe diameter expanding structure is arranged on the indwelling catheter, wherein the pipe diameter expanding structure can expand the pipe diameter of the indwelling catheter, so that the infusion channel is expanded.
Furthermore, a part of the tube wall of the indwelling catheter is recessed towards the inner side of the indwelling catheter to form a recessed part, and the recessed part is arranged close to the inner wall of the indwelling catheter and is arranged along the extending direction of the indwelling catheter; the pipe diameter expansion structure comprises a plurality of metal rings and a locking piece, wherein the metal rings are arranged on the inner wall of the indwelling catheter along the circumferential direction of the indwelling catheter, the metal rings are arranged in an open ring mode and have the tendency of expanding outwards, and the locking piece locks the plurality of metal rings under a certain inner diameter; the puncture needle penetrates through the metal ring; the plurality of metal rings are arranged at intervals along the extending direction of the indwelling catheter. In the arrangement, a specific design is made on the pipe diameter expansion structure, the pipe diameter is reduced by adopting the depression of the pipe wall of the indwelling catheter, and the arrangement of a plurality of metal rings can realize the expansion of the whole pipe diameter of the indwelling catheter; simple structure and low cost.
Furthermore, the metal rings are formed by metal wires in a surrounding mode, two ends of each metal wire are respectively provided with a limiting hole, the locking piece comprises a guide pin, and the guide pins simultaneously penetrate through the two limiting holes in the same metal wire, so that the metal wires form the metal rings; the guide pin sequentially penetrates through the limiting holes in all the metal rings, wherein one end, far away from the pipe orifice of the indwelling catheter, of the guide pin penetrates through the indwelling catheter or the indwelling base; the guide pin can be drawn out from the limiting hole from one end of the guide pin far away from the pipe orifice of the indwelling catheter. The metal ring is further designed in the arrangement, and the arrangement of the metal wire and the guide pin has a simple structure and is convenient to produce.
Furthermore, the locking piece also comprises a guide pin base, and the guide pin base is fixedly connected with one end of the guide pin far away from the pipe orifice of the indwelling catheter. In this kind of setting, going on of pipe diameter expansion operation is kept somewhere in setting up of guide pin base, only need can pull out the guide pin through pulling the guide pin base when using to thereby release the wire makes the wire expansion drive and keep somewhere the pipe expansion.
Further, the indwelling catheter further comprises a metal ring fixing piece, and the metal ring fixing piece is used for fixing the position of the metal ring in the extending direction of the indwelling catheter. In the arrangement, the metal ring fixing piece is arranged to fix the metal ring in the extending direction of the indwelling catheter, so that the expansion effect of the metal ring on the whole indwelling catheter is ensured.
Further, the outside of the indwelling catheter is also provided with a smooth film with high elasticity, the smooth film is used for ensuring the smoothness of the outer wall of the indwelling catheter, and when the indwelling catheter is expanded, the smooth film follows the indwelling catheter to be expanded together. In the arrangement, the arrangement of the smooth film ensures that the outer wall of the indwelling catheter is smooth, thereby enhancing the usability of the indwelling catheter and ensuring that the puncture process is smoother.
The puncture needle device further comprises a puncture needle protection head, wherein the puncture needle protection head is arranged in the indwelling base and sleeved on the peripheral wall of the puncture needle body; when the puncture needle assembly is drawn out of the indwelling catheter to the position of the indwelling base, the puncture needle protection head is clamped at the position of the puncture needle body close to the puncture end, and the puncture end is wrapped inside the puncture needle protection head. In the arrangement, the puncture needle protection head is arranged to wrap the puncture end of the puncture needle, so that the occurrence of accidental puncture of the needle body head can be avoided.
Furthermore, the puncture needle protection head is integrally a rotating body with a cavity, the puncture needle body penetrates through the rotating body, a contraction part is arranged on the rotating body, the rotating body is contracted towards the puncture needle body at the contraction part, and an elastic annular bulge surrounding the puncture needle body is arranged on the inner wall of the rotating body at the contraction part; an annular groove is formed in the outer wall, close to the puncture end, of the puncture needle body; when the indwelling needle is not used, the elastic annular bulge is in a compressed state; when the puncture needle protection head is clamped at the position of the puncture needle body close to the puncture end, the elastic annular bulge restores to the natural state and is clamped in the annular groove. In the arrangement, the puncture needle protection head is specifically designed, and the elastic annular bulge at the contraction part is matched with the annular groove on the outer wall of the puncture needle body, so that the puncture needle protection head can automatically wrap the puncture needle body, and the puncture needle protection head is simple in structure and convenient to operate.
Furthermore, the whole cross section of the annular groove is of a spoon-shaped structure, wherein one side of the spoon head is close to the puncture end. In the arrangement, the annular groove is provided with the spoon-shaped structure, the spoon handle can facilitate the elastic annular bulge to slide into the annular groove, and the spoon head part can well prevent the elastic annular bulge from sliding out of the annular groove.
The indwelling needle with the infusion channel with the variable radial size has the advantages that the infusion channel with the variable radial size is arranged, so that the puncture process is less in pain, and the infusion channel can be increased in the operation process to realize rapid liquid supplement, so that the using number of the indwelling needle in the operation can be reduced, and the puncture times can be reduced; the pipe diameter is reduced by adopting the depression of the wall of the indwelling catheter, and the pipe diameter of the whole indwelling catheter can be enlarged by arranging a plurality of metal rings; the structure is simple, and the cost is low; the puncture needle protection head is arranged to wrap the puncture end of the puncture needle, so that the occurrence of accidental puncture of the needle body head can be avoided.
Drawings
FIG. 1 is a perspective, schematic view of the overall structure of an indwelling needle having an infusion path with a variable radial dimension in an embodiment of the present invention;
FIG. 2 is an exploded view of an indwelling needle having an infusion path with an increased radial dimension in an embodiment of the present invention;
FIG. 3 is a schematic view showing the overall structure of an indwelling catheter assembly in an indwelling needle having an infusion path with a variable radial dimension in an embodiment of the present invention;
FIG. 4 is a schematic transverse sectional view of an indwelling catheter assembly at an indwelling catheter in an indwelling needle having an infusion path with a radially enlarged dimension which is an embodiment of the present invention;
FIG. 5 is a schematic transverse sectional view of an indwelling catheter assembly at an indwelling catheter in an indwelling needle having an infusion path with a variable radial dimension in another embodiment of the present invention;
FIG. 6 is a schematic right perspective view of an indwelling catheter assembly in an indwelling needle having an infusion path with an increased radial dimension in an embodiment of the present invention;
FIG. 7 is a partially enlarged view of FIG. 6 at the lead mount;
FIG. 8 is a schematic view of the overall configuration of the lancet assembly in an indwelling needle having an infusion path with an increased radial dimension in an embodiment of the present invention;
FIG. 9 is a schematic front view of an introducer needle assembly in an introducer needle having an infusion path with an increased radial dimension in an embodiment of the present invention;
FIG. 10 is an enlarged partial view of FIG. 9 at the annular groove;
FIG. 11 is a schematic view showing the overall configuration of a needle protector in an indwelling needle having an infusion path with a variable radial dimension in an embodiment of the present invention;
FIG. 12 is a schematic view of the needle protector and needle assembly in an assembled state with the indwelling needle unused and with the infusion path of variable radial dimension in an embodiment of the present invention;
fig. 13 is a schematic view of the partial cross-sectional structure of fig. 12 in the vicinity of the constriction of the protective tip of the puncture needle;
FIG. 14 is a schematic view of the needle protector and needle assembly in combination after use of an indwelling needle having an infusion path with an ever increasing radial dimension in an embodiment of the present invention;
fig. 15 is a partial cross-sectional view of fig. 14 near the constriction of the needle guard.
In the figure, 100, an indwelling catheter assembly; 110. a indwelling base; 111. a first end of the indwelling base; 112. a indwelling base second end; 113. a blocking projection; 120. an indwelling catheter; 121. a recessed portion; 122. a pipe orifice; 123. smoothing the film; 200. an introducer needle assembly; 210. puncturing the needle body; 211. a puncture end; 212. an annular groove; 213. a transparent blood return cavity; 214. an interface end; 220. a puncture needle base; 310. a metal ring; 320. guiding a needle; 330. a guide pin base; 331. an anti-slip structure; 400. fixing a sleeve; 500. a push plate; 600. a puncture needle protection head; 601. a cavity; 610. a constriction; 620. an elastic annular protrusion; 700. hemostatic plugs.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and some structures are not shown in the drawings, which can be derived by those skilled in the art from the disclosure of the present invention.
The invention only elaborates the specific improved parts, for example, the materials of all parts can be made of medical materials available in the market as long as the materials meet the requirements of the invention, so the invention is not limited in detail; other parts of the present invention that are directly accessible to a person skilled in the art from the prior art are not specifically described herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
EXAMPLE indwelling needle with variable radial dimension infusion channel
Fig. 1 is a perspective view showing the overall structure of an indwelling needle having a radially variable size infusion path in the present embodiment, and fig. 2 is an exploded view showing the indwelling needle having a radially variable size infusion path in the present embodiment, and as shown in fig. 1 to 2, the indwelling needle having a radially variable size infusion path in the present embodiment includes an indwelling catheter assembly 100 and a puncture needle assembly 200, the indwelling catheter assembly 100 includes an indwelling base 110 and a hollow indwelling catheter 120 disposed in communication with the indwelling base 110 at a first end of the indwelling base 110; the puncture needle assembly 200 comprises a puncture needle body 210 and a puncture needle base 220 arranged at one end of the puncture needle body 210; the other end of the puncture needle body 210 is a puncture end 211, the puncture end 211 enters from the second end 112 of the indwelling base and penetrates out of the tube opening 122 of the indwelling catheter 120, and the first end 111 of the indwelling base and the second end 112 of the indwelling base are arranged in a penetrating way; the hollow of the indwelling catheter 120 is an infusion channel through which infusion liquid flows during use of the indwelling needle, wherein the radial dimension of the infusion channel may be increased during indwelling.
In the indwelling needle with the infusion channel with the changeable radial size, as the infusion channel can be changed into the big radial size, the indwelling needle with the small relative size can be selected for puncture during puncture, so that the pain of puncture of a user can be reduced; during the operation, the infusion channel is enlarged so as to realize the function of rapidly replenishing liquid, thereby reducing the use number of the indwelling needle in the operation and reducing the puncture times.
Preferably, in the present embodiment, the indwelling catheter 120 is provided with a tube diameter expanding structure, wherein the tube diameter expanding structure can expand the tube diameter of the indwelling catheter 120, so as to expand the infusion channel.
Fig. 3 is a schematic view showing the overall structure of the indwelling catheter assembly 100 in the indwelling needle in which the radial dimension of the infusion path is made large in the present embodiment, fig. 4 is a schematic view showing a transverse cross section of the indwelling catheter assembly 100 in the indwelling needle in which the radial dimension of the infusion path is made large in the present embodiment at the indwelling catheter 120, as shown in fig. 3 to 4, a part of the wall of the indwelling catheter 120 in the present embodiment is recessed toward the inside of the indwelling catheter 120 to form a recessed portion 121, and the recessed portion 121 is disposed in close contact with the inner wall of the indwelling catheter 120 and along the extending direction of the indwelling catheter 120; the pipe diameter expansion structure comprises a plurality of metal rings 310 and a locking member, wherein the metal rings 310 are arranged on the inner wall of the indwelling catheter 120 along the circumferential direction of the indwelling catheter 120, the metal rings 310 are arranged in an open ring and the metal rings 310 have a tendency to expand outward, and the locking member locks the plurality of metal rings 310 under a certain inner diameter; the puncture needle passes through the ferrule 310; the plurality of metal rings 310 are provided at intervals along the extending direction of the indwelling catheter 120.
The tube wall of the indwelling catheter 120 in the embodiment is recessed to reduce the tube diameter, so that the structure is simple and the operation is convenient; further, when the locking member is opened, the open-loop metal ring 310 therein having a tendency to expand expands to expand the concave structure on the wall of the indwelling catheter 120, thereby expanding the overall diameter of the indwelling catheter 120; such an arrangement has the advantages of simple structure and low cost.
Preferably, in the present embodiment, in which the indwelling catheter 120 is gradually retracted adjacent to the needle at a location near the orifice 122, this arrangement facilitates the insertion. In use, the thickness of the pipe close to the pipe orifice 122 is small, so the pipe diameter can be enlarged under the action of the metal ring 310. In other embodiments, the nozzle 122 of the indwelling catheter 120 may be fixedly attached to the outside of the puncture needle, and the nozzle 122 may be easily disconnected from the portion of the indwelling catheter 120 having the metal ring 310 when the puncture needle is withdrawn, so that the nozzle 122 does not affect the diameter of the catheter after the indwelling catheter 120 is expanded.
Preferably, the indwelling catheter 120 may be provided at a position close to the indwelling base 110 with a structure in which the tube diameter is gradually enlarged to a certain tube diameter size.
Fig. 5 is a schematic cross-sectional view of an indwelling catheter assembly 100 in an indwelling needle having an infusion path with a variable radial dimension of another embodiment of the present invention, showing in fig. 5, a highly elastic smoothing film 123 is further provided on the outside of the indwelling catheter 120, and the smoothing film 123 is used to ensure the outer wall of the indwelling catheter 120 to be smooth, and when the indwelling catheter 120 is expanded, the smoothing film 123 is expanded together with the indwelling catheter 120. The smooth film 123 makes the outer wall of the indwelling catheter 120 smooth to enhance the usability of the indwelling catheter 120, and the puncturing process is made smoother.
In some preferred embodiments, the indwelling catheter 120 in this embodiment may also be provided as a highly elastic tubular structure in which a tube diameter expanding structure is provided, so that the tube diameter of the tubular structure can be expanded.
As shown in fig. 4, the metal ring 310 in this embodiment is formed by a metal wire, two ends of the metal wire are respectively provided with a limiting hole, the locking member includes a sliding film 123, and the guide pin 320 simultaneously passes through two limiting holes on the same metal wire, so that a plurality of metal wires form the plurality of metal rings 310; the guide pin 320 sequentially passes through all the limiting holes on the metal ring 310, wherein the end of the guide pin 320 far away from the tube opening 122 of the indwelling catheter 120 is arranged by penetrating the indwelling catheter 120 or the indwelling base 110; guide pin 320 may be withdrawn from the stop hole at the end of guide pin 320 that is distal to the nozzle 122 of indwelling catheter 120. In this embodiment, the wire is made of a material with deformation resistance, the guide needle 320 locks the wire, and after the guide wire is withdrawn, the wire is returned to a straight line or an arc shape from a circular shape, and the diameter of the indwelling catheter 120 is expanded under the action of the wire, so as to form the indwelling catheter 120 with larger inner and outer diameters.
Preferably, the position of the indwelling catheter 120 or indwelling base 110 in this embodiment penetrated by the guide needle 320 can be automatically closed to avoid blood outflow after the guide needle 320 is withdrawn, and it is also possible to artificially close by providing a stopper.
Fig. 6 is a right perspective view of the indwelling catheter assembly 100 in the indwelling needle having a radially enlarged infusion channel of the present embodiment, fig. 7 is a partially enlarged view of fig. 6 at the guide needle mount 330, and as shown in fig. 6 to 7, the locking member of the present embodiment further includes the guide needle mount 330, and the guide needle mount 330 is fixedly connected to the end of the guide needle 320 farther from the nozzle 122 of the indwelling catheter 120. Preferably, as shown in fig. 6, the needle guide base 330 in this embodiment is attached to the surface of the indwelling base 110. The whole structure is optimized by the attaching arrangement, and the influence of the guide pin base 330 on the puncturing process is avoided. Further, an anti-slip structure 331 is disposed on the surface of the guide pin base 330, and the guide pin 320 is pulled out more smoothly and conveniently due to the arrangement of the anti-slip structure 331. In particular use, after the puncture is completed, the puncture needle assembly 200 is withdrawn; when the diameter of the indwelling catheter 120 needs to be enlarged, the guide needle 320 can be pulled out only by pulling the guide needle base 330, so as to release the metal wire to expand the metal wire, thereby driving the indwelling catheter 120 to expand.
In this embodiment, a metal ring 310 fixing member is further included, and the metal ring 310 fixing member is used to fix the position of the metal ring 310 in the extending direction of the indwelling catheter 120. Specifically, as shown in fig. 4, the metal ring 310 fixing member in the present embodiment is a fixing sleeve 400 disposed on the inner wall of the indwelling catheter 120 along the circumferential direction of the indwelling catheter 120, wherein the metal ring 310 is inserted into the fixing sleeve 400, and the metal ring 310 can slide relative to the fixing sleeve 400. In such an arrangement, the metal ring 310 is fixed in position in the extending direction of the indwelling catheter 120 by providing the metal ring 310 fixing member, thereby ensuring the expanding action of the metal ring 310 on the whole indwelling catheter 120.
Preferably, a pushing plate 500 is further disposed on the indwelling base 110, and a plate surface of the pushing plate 500 is perpendicular to the axis of the indwelling catheter 120. The push plate 500 is provided to facilitate a one-handed lancing operation. Preferably, indwelling base second end 112 in this embodiment may be connected to a syringe.
Further preferably, as shown in fig. 6, the needle guide base 330 in this embodiment is disposed on the surface of the indwelling base 110 between the pushing plate 500 and the indwelling needle catheter. Such an arrangement allows for more smooth withdrawal of the lead 320 and the lead mount 330 does not interfere with the puncturing process.
FIG. 8 is a schematic view showing the overall configuration of an introducer needle assembly 200 in an indwelling needle having an infusion path with a large radial dimension according to the present embodiment, and FIG. 9 is a schematic view showing the front configuration of the introducer needle assembly 200 in an indwelling needle having an infusion path with a large radial dimension according to the present embodiment; as shown in fig. 8-9, the needle assembly 200 in this embodiment includes a puncture needle body 210 and a needle mount 220 disposed at one end of the puncture needle body 210; the other end of the puncture needle body 210 is a puncture end 211; the puncture needle base 220 in this embodiment is sequentially provided with a transparent blood return cavity 213 and a connector end 214 on one side far away from the puncture needle body 210, wherein the transparent blood return cavity 213 is convenient for observing blood return so as to judge whether the indwelling needle is successfully punctured, and the connector end 214 can be connected with a syringe.
1-2, the variable radial dimension of the infusion path of the present embodiment of the introducer needle may also include a hemostatic plug 700 removably disposed at the hub end 214 of the introducer needle assembly 200. hemostatic plug 700 is configured to prevent blood from escaping through hub end 214 during the lancing procedure.
As shown in fig. 1-2, the indwelling needle of the present embodiment in which the infusion path is made variable in radial dimension further includes a puncture needle protection head 600, the puncture needle protection head 600 being disposed in the indwelling base 110 and fitted over the outer peripheral wall of the puncture needle body 210; when the puncture needle assembly 200 is withdrawn from the indwelling catheter 120 to the position of the indwelling base 110, the puncture needle protection head 600 is caught at the position of the puncture needle body 210 near the puncture tip 211, and the puncture tip 211 is wrapped inside the puncture needle protection head 600. The puncture tip 211 of the puncture needle can be wrapped by the arrangement of the puncture needle protection head 600, so that the occurrence of needle body head false puncture can be avoided.
The present embodiment further optimizes the design of the lancet head 600 as described in detail below.
Fig. 10 is a partially enlarged view of fig. 9 at the annular groove 212, and fig. 11 is a view showing the entire structure of a puncture needle protective head 600 in an indwelling needle in which the radial dimension of an infusion path is made larger in this embodiment. FIG. 12 is a schematic view showing the assembled state of the puncture needle protective head 600 and the puncture needle assembly 200 in the unused state of the indwelling needle in which the radial dimension of the infusion path is made variable in the present embodiment; fig. 13 is a schematic view, partly in section, of fig. 12 in the vicinity of the constriction 610 of the needle guard 600; FIG. 14 of this embodiment, as shown in FIGS. 11-13, is a view showing the assembled state of the puncture needle protective head 600 and the puncture needle assembly 200 after the use of the indwelling needle in which the radial dimension of the infusion path is made variable in this embodiment; fig. 15 is a partial cross-sectional view of fig. 14 near the constriction 610 of the needle guard 600.
As shown in fig. 11 to 15, the puncture needle protection head 600 in this embodiment is a rotary body having a cavity 601 as a whole, the puncture needle body 210 is disposed to penetrate the rotary body, a constricted portion 610 is provided on the rotary body, the rotary body is constricted toward the puncture needle body 210 at the constricted portion 610, and an elastic annular protrusion 620 surrounding the puncture needle body 210 is provided on an inner wall of the rotary body at the constricted portion 610; as shown in fig. 10, an annular groove 212 is formed on the outer wall of the puncture needle body 210 near the puncture tip 211; when the indwelling needle is not in use, the elastic annular projection 620 is in a compressed state as shown in fig. 13; when the puncture needle protection head 600 is stuck at a position of the puncture needle body 210 near the puncture tip 211, the elastic annular protrusion 620 is restored to a natural state and is stuck in the annular groove 212. The puncture needle protection head 600 is specifically designed, and the elastic annular protrusion 620 at the contraction part 610 is matched with the annular groove 212 on the outer wall of the puncture needle body 210, so that the puncture needle protection head 600 can automatically wrap the puncture needle body 210, and the puncture needle protection head is simple in structure and convenient to operate. The elastic ring-shaped protrusion 620 in this embodiment may be made of a silicone material. A blocking protrusion 113 may be further provided on the inner wall of the indwelling base 110, said blocking protrusion 113 being for blocking the sliding of the puncture protecting head within the indwelling base 110. The puncture protection head can be driven to be separated from the indwelling needle base only when the puncture needle assembly 200 is pulled with force.
Preferably, as shown in fig. 10, the cross section of the annular groove 212 in this embodiment is a spoon-shaped structure, wherein one side of the spoon head is disposed near the piercing end 211. The annular groove 212 is provided with a spoon-shaped structure, the spoon handle can facilitate the elastic annular protrusion 620 to slide into the annular groove 212, and the spoon head part can well prevent the elastic annular protrusion 620 from sliding out of the annular groove 212.
The above description of the embodiments is only for the understanding of the present invention. It should be noted that modifications could be made to the invention without departing from the principle of the invention, which would also fall within the scope of the claims of the invention.
Claims (10)
1. An indwelling needle with an infusion passage with a variable radial dimension is characterized by comprising an indwelling catheter component and an puncture needle component, wherein the indwelling catheter component comprises an indwelling base and a hollow indwelling catheter which is arranged at a first end of the indwelling base and communicated with the indwelling base; the puncture needle assembly comprises a puncture needle body and a puncture needle base arranged at one end of the puncture needle body; the other end of the puncture needle body is a puncture end, the puncture end enters from the second end of the indwelling base and penetrates out of the pipe orifice of the indwelling catheter, and the first end of the indwelling base and the second end of the indwelling base are arranged in a penetrating manner; wherein the hollow of the indwelling catheter is an infusion channel through which infusion liquid flows during use of the indwelling needle, wherein the radial dimension of the infusion channel can be increased during indwelling.
2. An indwelling needle according to claim 1, in which the indwelling catheter is provided with a tube diameter expanding structure which can expand the tube diameter of the indwelling catheter, thereby expanding the infusion channel.
3. The indwelling needle of claim 2, in which a part of the tube wall of the indwelling catheter is recessed toward the inside of the indwelling catheter to form a recess that is disposed against the inner wall of the indwelling catheter and in the direction of extension of the indwelling catheter; the pipe diameter expansion structure comprises a plurality of metal rings and a locking piece, wherein the metal rings are arranged on the inner wall of the indwelling catheter along the circumferential direction of the indwelling catheter, the metal rings are arranged in an open ring mode and have the tendency of expanding outwards, and the locking piece locks the plurality of metal rings under a certain inner diameter; the puncture needle penetrates through the metal ring; the plurality of metal rings are arranged at intervals along the extending direction of the indwelling catheter.
4. The indwelling needle of claim 3, in which the metal ring is surrounded by a metal wire, the two ends of the metal wire are respectively provided with a limiting hole, the locking member comprises a guide needle, the guide needle simultaneously passes through the two limiting holes on the same metal wire, so that a plurality of metal wires form the plurality of metal rings; the guide pin sequentially penetrates through the limiting holes in all the metal rings, wherein one end, far away from the pipe orifice of the indwelling catheter, of the guide pin penetrates through the indwelling catheter or the indwelling base; the guide pin can be drawn out from the limiting hole from one end of the guide pin far away from the pipe orifice of the indwelling catheter.
5. The indwelling needle of claim 4, in which the locking member further includes a guide needle mount fixedly connected to the end of the guide needle that is further from the nozzle of the indwelling catheter.
6. The indwelling needle of claim 4, in which the infusion path has a variable radial dimension, further comprising a metal ring fixing member which the metal ring fixing member uses to fix the position of the metal ring in the direction in which the indwelling catheter extends.
7. An indwelling needle according to any one of claims 3 to 6, in which a highly resilient smoothing membrane is provided on the outside of the indwelling catheter, the smoothing membrane serving to ensure the outer wall of the indwelling catheter to be smooth, and the smoothing membrane following the indwelling catheter to expand when the indwelling catheter expands.
8. The indwelling needle of claim 1, wherein the infusion path has an increasing radial dimension, further comprising a puncture needle protection head disposed in the indwelling base and fitted over the peripheral wall of the puncture needle body; when the puncture needle assembly is drawn out of the indwelling catheter to the position of the indwelling base, the puncture needle protection head is clamped at the position of the puncture needle body close to the puncture end, and the puncture end is wrapped inside the puncture needle protection head.
9. The indwelling needle of claim 8, where the needle protection head is a generally hollow body of revolution, where the piercing needle body is disposed through the body of revolution, where a constriction is provided where the body of revolution is constricted towards the piercing needle body, where an inner wall of the body of revolution at the constriction is provided with a resilient annular protrusion around the piercing needle body; an annular groove is formed in the outer wall, close to the puncture end, of the puncture needle body; when the indwelling needle is not used, the elastic annular bulge is in a compressed state; when the puncture needle protection head is clamped at the position of the puncture needle body close to the puncture end, the elastic annular bulge restores to the natural state and is clamped in the annular groove.
10. An indwelling needle for infusion channel enlargement in the radial dimension of the infusion channel as in claim 9, where the annular groove is generally spoon shaped in cross section with the spoon head side positioned adjacent the piercing end.
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| CN202010918983.2A CN111839686B (en) | 2020-09-04 | 2020-09-04 | Indwelling needle with infusion channel with variable radial size |
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| CN202010918983.2A CN111839686B (en) | 2020-09-04 | 2020-09-04 | Indwelling needle with infusion channel with variable radial size |
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Cited By (1)
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| CN113058109A (en) * | 2021-04-02 | 2021-07-02 | 福建医科大学附属第一医院 | Blood vessel puncture assembly |
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| Publication number | Publication date |
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| CN111839686B (en) | 2021-03-02 |
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