CN113058109B - Blood vessel puncture assembly - Google Patents
Blood vessel puncture assembly Download PDFInfo
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- CN113058109B CN113058109B CN202110361278.1A CN202110361278A CN113058109B CN 113058109 B CN113058109 B CN 113058109B CN 202110361278 A CN202110361278 A CN 202110361278A CN 113058109 B CN113058109 B CN 113058109B
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- circumferentially
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- tube
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- 210000004204 blood vessel Anatomy 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 5
- 230000002792 vascular Effects 0.000 claims description 3
- 238000001802 infusion Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 53
- 239000000463 material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 4
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000010836 blood and blood product Substances 0.000 description 1
- 229940125691 blood product Drugs 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
- A61M2005/1586—Holding accessories for holding infusion needles on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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 blood vessel puncture assembly, which comprises: puncturing needle; the base is provided with a first inner cavity, the near end of the first inner cavity is provided with a self-sealing opening, the side wall of the first inner cavity is provided with an opening, and the opening is used for being communicated with the infusion catheter; and a puncture cannula extending distally from the distal end of the base, the interior passage of the puncture cannula communicating with the first lumen and aligned with the self-sealing aperture; wherein, puncture sleeve pipe includes the outer tube of outer tube outside longitudinal extension's inner tube and cover were established including, the inner tube is injectd the inner passage, and forms annular second inner chamber between outer tube and the inner tube, and annular second inner chamber can radially scale, and this subassembly has realized the purpose of adjustment puncture sleeve pipe diameter size, has avoided puncture once more's needs, convenient operation.
Description
Technical Field
The invention relates to a medical apparatus, in particular to a blood vessel puncture assembly.
Background
Venipuncture catheterization is one of the means commonly used in intravenous infusion in clinic. Generally, an indwelling needle, also called a trocar, is used for venipuncture, and the core components of the indwelling needle include a soft catheter/cannula capable of being indwelling in a blood vessel, a stainless steel puncture guiding needle core and a plastic needle seat. When the puncture is made, the outer sleeve and the needle core are inserted into the blood vessel together, and after the sleeve is fed into the blood vessel, the needle core and the plastic needle seat are withdrawn, and only the soft sleeve is left in the blood vessel. The indwelling needle can be used in the fields of intermittent or continuous infusion therapy, short-term pump infusion or single dose administration, blood sample collection or blood product infusion, hemodynamic monitoring and the like, and is suitable for arteries, superficial veins and deep veins. However, the existing indwelling needle has the defects of fixed tube diameter, short indwelling time and the like, and the problem of indwelling needle with adjustable tube diameter is urgently needed at present.
Disclosure of Invention
The invention aims to provide a blood vessel puncture assembly, which realizes the purpose of adjusting the pipe diameter of a puncture sleeve, avoids the need of re-puncture and is convenient to operate.
In order to solve the above technical problem, the present assembly comprises: puncturing needle; the base is provided with a first inner cavity, the near end of the first inner cavity is provided with a self-sealing opening, the side wall of the first inner cavity is provided with an opening, and the opening is used for being communicated with a transfusion catheter; and a puncture cannula extending distally from the distal end of the base, the puncture cannula having an internal passageway in communication with the first lumen and aligned with the self-sealing aperture; wherein the puncture cannula comprises a longitudinally extending inner tube and an outer tube sleeved outside the inner tube, the inner tube defines the internal passage, and an annular second lumen is formed between the outer tube and the inner tube, the annular second lumen being radially scalable.
In some embodiments, the inner tube comprises: at least two circumferential segments extending in a longitudinal direction; and the at least two flexible connecting parts are positioned between two adjacent circumferential sections in the at least two circumferential sections and are connected with adjacent circumferential ends of the two adjacent circumferential sections.
In some embodiments, a radially flexible connecting strip is further disposed between the outer tube and the inner tube, and the outer sides of the at least two circumferential sections are respectively connected with the inner side of the outer tube through the radially flexible connecting strip.
In some embodiments, the at least two circumferential segments are configured to rotate about the axis by rotation of the outer tube to engage the radially flexible connecting strip.
In some embodiments, the vascular puncture assembly further comprises a twist grip fixedly connected to the outer tube.
In some embodiments, each circumferential segment is a single circumferential layer.
In some embodiments, the at least two circumferential segments are two; at least one of the two circumferential segments comprises an overlapping arrangement of a circumferential outer layer and a circumferential inner layer, a first of the circumferential outer layer and the circumferential inner layer having a first excess portion extending circumferentially beyond a second layer to form a first circumferential end of the circumferential segment; the second layer has a second excess portion extending circumferentially beyond the first layer to form a second circumferential end of the at least one circumferential segment.
In some embodiments, the two circumferential segments comprise a first circumferential segment and a second circumferential segment; the first circumferential section comprises a first circumferential outer layer and a first circumferential inner layer, the first circumferential outer layer having a first outer portion extending circumferentially beyond the first circumferential inner layer to form a first outer circumferential end of the first circumferential section; the first circumferentially inner layer has a first excess inner portion extending circumferentially and beyond the first circumferentially outer layer to form a first inner circumferential end of the first circumferential section;
the second circumferential section comprises a second circumferential outer layer and a second circumferential inner layer having a second excess inner portion extending circumferentially beyond the second circumferential outer layer to form a second inner circumferential end of the second circumferential section; the second circumferentially outer layer having a second outboard portion extending circumferentially beyond the second circumferentially inner layer to form a second outboard circumferential end of the second circumferential segment;
the two flexible connecting parts are respectively connected with the first outer circumferential end, the second inner circumferential end, the first inner circumferential end and the second outer circumferential end.
In some embodiments, each circumferential segment further comprises a circumferential middle layer extending circumferentially between and not circumferentially beyond the circumferential outer layer and the circumferential inner layer.
In some embodiments, the outer tube has a cannula port formed in a sidewall thereof, the cannula port being in communication with a fluid source.
In some embodiments, the puncture needle is a hollow needle, and a through opening is formed in the side wall of the puncture needle.
The invention also provides a vessel puncture kit comprising a vessel puncture assembly according to any of the preceding claims and a fixation part, the fixation part comprising a first part fixedly connected with the vessel puncture assembly and a second part for fixedly connected with the skin.
Drawings
FIG. 1 is a schematic structural view of a blood vessel puncturing assembly in accordance with a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of the puncture cannula A-A of FIG. 1;
FIG. 3 is a state view of the inner tube of FIG. 2 after contraction;
FIG. 4 is a schematic structural view of a blood vessel puncturing assembly in accordance with a second embodiment of the present invention;
FIG. 5 is a schematic structural view of a vascular puncture kit including a securement portion in accordance with some embodiments of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.
In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms. As used herein, "distal" and "proximal" of "distal", "proximal", and "distal" refer to positions relative to an operator of the needle assembly that are "proximal to the operator and" distal "away from the operator.
The blood vessel puncture assembly of the present invention is described below with reference to the accompanying drawings, and as shown in fig. 1 and 2, the assembly includes a base 1, a puncture needle 2, and a puncture cannula 3. The base 1 has a first lumen 11, a self-sealing aperture 12 is provided at the proximal end of the first lumen 11, and an opening 13 is provided in the side wall of the first lumen 11, the opening 13 being adapted to communicate with an infusion catheter. A puncture cannula 3 is connected to the base 1 and extends distally from the distal end of the base, the interior of the puncture cannula 3 being provided with an internal passage 30, the internal passage 30 communicating with the first lumen 11 of the base 1 and being aligned with the self-sealing aperture 12. Thus, the puncture needle 2 can enter the puncture cannula 3 through the self-sealing aperture 12 via the first lumen 11, with the distal end of the puncture needle 2 extending beyond the distal end of the puncture cannula 3. After the puncture needle 2 is inserted into or pulled out of the self-sealing opening 12, the self-sealing opening 12 prevents the liquid in the first lumen 11 from leaking out therefrom, thereby forming a self-sealing structure. The self-sealing aperture 12 may be made of a butyl rubber material, or may be made of other materials, and is not limited herein. In some embodiments, the needle 2 is a hollow needle, and the needle 2 further includes a through opening (not shown) in the sidewall thereof. After the puncture needle 2 enters the vein, blood can enter the puncture needle 2, then enters the internal channel 30 of the puncture sleeve 3 through the through hole on the side wall of the puncture needle, further enters the first inner cavity 11 of the base 1, whether the vein is successfully punctured at the moment can be confirmed by visually puncturing and returning blood, the operation is convenient, and the puncture success rate is high.
The second lumen 33 of the puncture cannula 3 may be radially scaled. Specifically, as shown in FIG. 2, the puncture cannula 3 comprises an outer tube 31 and an inner tube 32, both the outer tube 31 and the inner tube 32 extending distally from the distal end of the base 1 in the longitudinal direction, the outer tube 31 being sleeved outside the inner tube 32, the inner tube 32 forming the inner passage 30 of the puncture cannula 3, and a second inner cavity 33 in the shape of a ring being formed between the outer tube 31 and the inner tube 32.
Wherein the inner tube 32 comprises at least two circumferential segments extending in the longitudinal direction and at least two flexible connecting portions, which are exemplarily illustrated in the present embodiment as two circumferential segments and two flexible connecting portions, respectively located between two adjacent circumferential segments and respectively connecting adjacent circumferential ends of two adjacent circumferential segments. In a preferred embodiment, each circumferential segment comprises a circumferential outer layer and a circumferential inner layer arranged in an overlapping manner. Specifically, as shown in FIG. 2, the two circumferential segments include a first circumferential segment 32a and a second circumferential segment 32b, and the two flexible connections include a first flexible connection 34a and a second flexible connection 34 b. The first circumferential segment 32a includes a first circumferential outer layer 321a and a first circumferential inner layer 323 a. Wherein the first circumferentially outer layer 321a has a first outer excess portion extending circumferentially and beyond the first circumferentially inner layer 323a, the first outer excess portion forming a first outer circumferential end 35a of the first circumferential segment 32a at one end thereof. At the other end of the first circumferential segment 32a, the first circumferentially inner layer 323a has a first excess inner portion extending circumferentially beyond the first circumferentially outer layer 321a, the first excess inner portion forming a first inner circumferential end 36a of the first circumferential segment 32a at the other end thereof.
Similar to the first circumferential segment 32a, the second circumferential segment 32b includes a second circumferentially outer layer 321b and a second circumferentially inner layer 323 b. Wherein the second circumferentially inner layer 323b has a second excess inner portion extending circumferentially beyond the second circumferentially outer layer 321b, the second excess inner portion forming a second inner circumferential end 35b of the second circumferential segment 32b at one end thereof. And at the other end of the second circumferential section 32b, the second circumferentially outer layer 321b has a second outer excess portion extending circumferentially beyond the second circumferentially inner layer 323b, the second outer excess portion forming a second outer circumferential end 36b of the second circumferential section 32b at the other end thereof.
The first flexible connecting portion 34a is used to connect the first outer circumferential end 35a and the second inner circumferential end 35b, and the connecting position is only shown by way of example, and the actual connecting position may be any position on the first outer exceeding portion and the second inner exceeding portion, and is not limited herein. The length of the first flexible connection 34a preferably exceeds the length of the first or second outer excess portion. Similar to the first flexible connecting portion 34a, the second flexible connecting portion 34b connects the first inner circumferential end 36a and the second outer circumferential end 36b, and for brevity, the description is omitted here.
It should be understood that the number of circumferential segments is not limited to two in the above-described embodiment, but may be arbitrarily set as required. The circumferential segments may also be provided as a single layer as desired. Wherein the circumferential segments and the flexible connection are made of a sealing material, thereby isolating the first lumen 11 and the second lumen 33 from each other.
A radially flexible connecting strip is also arranged between the inner tube 31 and the outer tube 32 of the puncture cannula 3, which flexible connecting strip is used to connect the outside of each circumferential section with the inside of the outer tube 32. That is, the two circumferential segments are each connected to the outer tube 32 by a radially flexible connecting strip.
Specifically, as shown in fig. 2, the outer side of the first circumferential section 32a is connected to the inner side of the outer tube 31 by a first radially flexible connecting strip 37a, and the outer side of the second circumferential section 32b is connected to the inner side of the outer tube 31 by a second radially flexible connecting strip 37 b. Fig. 2 exemplarily shows a state before the inner tube 32 is contracted, when the outer tube 32 is rotated clockwise by an external force, the radial flexible connecting strips 37a and 37b connected to the outer tube 32 drive the circumferential segments to rotate around the axis, so as to drive the first outer circumferential end 35a to lean against the second inner circumferential end 35b, so that the overlapping portion of the first outer portion and the second outer portion in the radial direction is increased until the first outer circumferential end 35a abuts against the second circumferential segment 32b, or the second inner circumferential end 35b abuts against the first circumferential segment 32a, and meanwhile, the first flexible connecting portion 34a and the second flexible connecting portion 34b are also in a stretched state to a compressed state. Similarly, the second outer circumferential end 36b is brought closer to the first inner circumferential end 36a, so that the overlapping portion between the second outer exceeding portion and the first inner exceeding portion increases until the second outer circumferential end 36b abuts against the second circumferential section 32a, or the first inner circumferential end 36a abuts against the second circumferential section 32b, and the second flexible connecting portion 34b is also brought from the stretched state to the compressed state. At this time, since the pipe diameter of the inner pipe 32 is contracted, the inner passage 30 defined by the inner pipe 32 is also contracted, and the second lumen 33 is enlarged. Fig. 3 shows the state where the inner passage 30 is narrowed (while the second lumen 33 is enlarged) after the outer tube 31 is rotated clockwise. Based on the same principle, the tube diameter of the inner passage 30 can be increased by rotating the outer tube 31 counterclockwise in the opposite direction, and the enlarged state of the inner passage 30 in fig. 2 can be returned (while the second inner cavity 33 is contracted). However, it is understood that the clockwise narrowing of the internal channel 30 and the counterclockwise enlarging of the internal channel 30 in the embodiments of the present application are merely exemplary and not limited thereto. This application drives the mode that the inner tube linkage realized zooming through rotating the outer tube, has reached the purpose of adjustment puncture sleeve pipe diameter size.
It should be appreciated that the flexible connectors may be provided in any number as desired, for example, a plurality of flexible connectors may be provided spaced apart along the length of the puncture cannula 3 to ensure that each circumferential segment is able to scale stably and consistently in the longitudinal direction. The flexible connector of the present invention should be made of a material that is rigid but can be bent appropriately so that the flexible connector can rotate at an angle relative to the connection with the circumferential segments and the outer tube 31. The flexible connector may be made entirely of flexible material or only a portion of flexible material, for example only at the connection of the two ends of the flexible connector with the circumferential section and the outer tube 31.
In some embodiments, each circumferential segment further comprises a circumferential middle layer between the circumferential outer layer and the circumferential inner layer. As shown in fig. 2, the first circumferential segment 32a further includes a first circumferential middle layer 322a, the second circumferential segment 32b further includes a second circumferential middle layer 322b, and the first circumferential middle layer 322a extends circumferentially between the first circumferential outer layer 321a and the first circumferential inner layer 323a without exceeding the first circumferential outer layer 321a or the first circumferential inner layer 323a in length, and likewise the second circumferential middle layer 322b extends circumferentially between the second circumferential outer layer 321b and the second circumferential inner layer 323b without exceeding the second circumferential outer layer 321b or the second circumferential inner layer 323b in length.
This application can be so that first surpass between outer portion and the second surpass the interior portion through setting up circumference middle level to and first surpass interior portion and second surpass the outer portion and radially separate the distance of a circumference middle level thickness, make two circumference sections when rotating around the axis, be difficult to produce between each circumference end and interfere, reduced the risk of scaling inefficacy. It is understood that in some embodiments, the at least two circumferential segments may be partially two layers, partially three layers, or even partially a single layer, as long as the second lumen is scalable by rotation about an axis, and is not limited thereto.
In some embodiments, as shown in fig. 1, the blood vessel puncture assembly further comprises a twist grip 5, and the twist grip 5 is fixedly connected to the outer tube 31. When can twist about outer tube 31 through twisting 5 handles, can be comparatively laborsaving completion outer tube drive the rotation of inner tube, it is comparatively convenient to operate, has improved user experience.
In addition, the puncture cannula 3 may have a length of between 2cm and 60 cm. In some embodiments, such as for general venipuncture, the puncture cannula may be 2cm to 4cm in length, for deep venipuncture, 12cm to 15cm in length, and up to 60cm in length for PICC catheters.
In addition, as shown in fig. 1, the blood vessel puncture assembly may further include a handle 6, and the handle 6 is fixedly connected with the puncture needle 2, and may be used to insert or extract the puncture needle 2 into or from the self-sealing opening 12 and the puncture cannula 3, so as to facilitate the operation.
It should be further noted that the location of the opening 13 in fig. 1 is merely exemplary, and the actual opening 13 may be located on any outer wall of the first lumen 11, including the location of the self-sealing aperture 12, wherein the self-sealing aperture 12 is replaced by the opening 13, from which fluid enters the first lumen 11 for delivery into the body vessel through the puncture cannula 3.
A second embodiment of the present invention is described below with reference to the drawings. A second embodiment of the present invention is directed to a vessel puncture assembly, the main difference between the second embodiment and the first embodiment is that in the second embodiment, a cannula port is further formed in the sidewall of the outer tube, and the cannula port is in communication with a fluid source.
Specifically, as shown in fig. 4, a cannula port 311 is formed on a sidewall of an outer tube 31 of a puncture cannula of the blood vessel puncture assembly, the cannula port 311 is communicated with a fluid source 38 through a fluid tube, where the fluid source 38 may be a gas source or a liquid source, and gas or liquid is filled into or pumped out of an inner cavity between the outer tube 31 and the inner tube 32, so that after the gas or liquid enters the inner cavity between the outer tube 31 and the inner tube 32, the diameter of the outer tube 31 is expanded, and the diameter of the inner tube 32 is also increased, thereby achieving the purpose of adjusting the diameter of the puncture cannula. In the preferred embodiment, a fluid valve 39 is also provided between the cannula port 311 and the fluid source 38, and in operation, the fluid source 38 may be depressed by manual or automatic means, and fluid passes through the fluid valve 39 and the fluid line into the lumen between the outer tube 31 and the inner tube 32. The fluid valve 39 is effective to prevent fluid entering the lumen from flowing back toward the fluid source 38. After the pressurization is completed, the fluid valve 39 can be pressed, and the fluid valve 39 can be opened to discharge the fluid in the inner cavity between the outer tube 31 and the inner tube 32. In some embodiments, the fluid source 38 may be an inflatable balloon or a fluid bladder, which is not limited herein. The inner tube structure in this embodiment may be the same as that in the first embodiment, or may be a common annular inner tube, which is not limited herein.
The application also provides a blood vessel puncture kit, which comprises the blood vessel puncture assembly and the fixing part in the embodiment. Specifically, as shown in fig. 5, the fixing portion may be a patch including a first portion 41 and a second portion 42, the first portion 41 being a circle portion in the figure for fixing the blood vessel puncturing member, the second portion being a diagonal portion in the figure for attaching to a skin needle, the folded state does not affect the puncturing when not in use, the release liner is torn after the puncturing, the patch is attached to the skin, and the patch is turned over and attached to be reinforced by unfolding the wing portions, thereby protecting the puncturing point. However, it is understood that the fixing portion may be other fixing members. The displacement of the puncture point which possibly occurs in the operation process can be avoided through the fixing part, and the assembly is prevented from shaking, falling off or being folded and twisted so as to influence the transfusion.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
Claims (9)
1. A blood vessel puncture assembly, comprising:
puncturing needle;
the base is provided with a first inner cavity, the near end of the first inner cavity is provided with a self-sealing opening, the side wall of the first inner cavity is provided with an opening, and the opening is used for being communicated with a transfusion catheter; and
a puncture cannula extending distally from the distal end of the base, the puncture cannula having an internal passage in communication with the first lumen and aligned with the self-sealing aperture;
wherein the puncture cannula comprises a longitudinally extending inner tube and an outer tube nested outside the inner tube, the inner tube defining the interior passage, and an annular second lumen formed between the outer tube and the inner tube, the annular second lumen being radially scalable;
the inner tube includes:
at least two circumferential segments extending in a longitudinal direction; and
at least two flexible connecting parts, wherein the at least two flexible connecting parts are positioned between two adjacent circumferential sections in the at least two circumferential sections and are connected with adjacent circumferential ends of the two adjacent circumferential sections;
a radial flexible connecting strip is further arranged between the outer pipe and the inner pipe, and the outer sides of the at least two circumferential sections are respectively connected with the inner side of the outer pipe through the radial flexible connecting strip;
the at least two circumferential segments are configured to rotate about the axis by rotation of the outer tube to drive the radially flexible connecting strip.
2. The blood vessel puncture assembly of claim 1, further comprising a twist handle fixedly coupled to the outer tube.
3. The blood vessel puncture assembly of claim 1, wherein each circumferential segment is a single circumferential layer.
4. The vessel puncture assembly of claim 1, wherein there are two of the at least two circumferential segments;
at least one of the two circumferential segments comprises an overlapping arrangement of a circumferential outer layer and a circumferential inner layer, a first of the circumferential outer layer and the circumferential inner layer having a first excess portion extending circumferentially beyond a second layer to form a first circumferential end of the circumferential segment; the second layer has a second excess portion extending circumferentially beyond the first layer to form a second circumferential end of the at least one circumferential segment.
5. The vascular puncture assembly of claim 4, wherein the two circumferential segments comprise a first circumferential segment and a second circumferential segment; the first circumferential section comprises a first circumferential outer layer and a first circumferential inner layer, the first circumferential outer layer having a first outer excess portion extending circumferentially beyond the first circumferential inner layer to form a first outer circumferential end of the first circumferential section; the first circumferentially inner layer has a first excess inner portion extending circumferentially and beyond the first circumferentially outer layer to form a first inner circumferential end of the first circumferential section;
the second circumferential section including a second circumferentially outer layer and a second circumferentially inner layer, the second circumferentially inner layer having a second excess inner portion extending circumferentially beyond the second circumferentially outer layer to form a second inner circumferential end of the second circumferential section; the second circumferentially outer layer having a second outboard portion extending circumferentially beyond the second circumferentially inner layer to form a second outboard circumferential end of the second circumferential segment;
the two flexible connecting parts are respectively connected with the first outer circumferential end, the second inner circumferential end, the first inner circumferential end and the second outer circumferential end.
6. The blood vessel puncture assembly of claim 4, wherein each circumferential segment further comprises a circumferential middle layer extending circumferentially between and not circumferentially beyond the circumferential outer layer and the circumferential inner layer.
7. The vessel puncture assembly of claim 1, wherein the outer tube defines a cannula port in a sidewall thereof, the cannula port being in communication with a fluid source.
8. The blood vessel puncture assembly of claim 1, wherein the puncture needle is a hollow needle, and a through opening is formed in a side wall of the puncture needle.
9. A vessel puncture kit comprising a vessel puncture assembly according to any of the preceding claims and a fixation portion, the fixation portion comprising a first portion fixedly connected with the vessel puncture assembly and a second portion for fixed connection with the skin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110361278.1A CN113058109B (en) | 2021-04-02 | 2021-04-02 | Blood vessel puncture assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110361278.1A CN113058109B (en) | 2021-04-02 | 2021-04-02 | Blood vessel puncture assembly |
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| CN113058109A CN113058109A (en) | 2021-07-02 |
| CN113058109B true CN113058109B (en) | 2022-08-02 |
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| CN110769887A (en) * | 2017-06-21 | 2020-02-07 | 爱德华兹生命科学公司 | Expandable sheath and method of using same |
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| CN211835744U (en) * | 2020-01-21 | 2020-11-03 | 昊朗科技（佛山）有限公司 | Trocar catheter for venipuncture |
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| JP3432060B2 (en) * | 1995-09-05 | 2003-07-28 | テルモ株式会社 | Vasodilator |
| EP2194934A1 (en) * | 2007-08-27 | 2010-06-16 | Boston Scientific Limited | Bulging balloon for bifurcation catheter assembly and methods |
| JP6617398B2 (en) * | 2014-08-28 | 2019-12-11 | 住友ベークライト株式会社 | Guide tube |
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| CN200998511Y (en) * | 2007-01-29 | 2008-01-02 | 蒋国良 | Transfusion tool of needles staying on vein |
| CN201200674Y (en) * | 2008-06-06 | 2009-03-04 | 段希康 | Infusion device |
| CN103458812A (en) * | 2011-01-26 | 2013-12-18 | 汉斯·海因德尔 | Suprapubic safety cannula |
| US10342573B1 (en) * | 2016-12-05 | 2019-07-09 | Daniel Ezra Walzman | System and method for clot amelioration |
| CN110769887A (en) * | 2017-06-21 | 2020-02-07 | 爱德华兹生命科学公司 | Expandable sheath and method of using same |
| CN211835744U (en) * | 2020-01-21 | 2020-11-03 | 昊朗科技（佛山）有限公司 | Trocar catheter for venipuncture |
| CN111839686A (en) * | 2020-09-04 | 2020-10-30 | 首都医科大学附属北京天坛医院 | Indwelling needle with infusion channel with variable radial size |
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