CN117547263A - Puncture needle for deep vein - Google Patents
Puncture needle for deep vein Download PDFInfo
- Publication number
- CN117547263A CN117547263A CN202410048088.8A CN202410048088A CN117547263A CN 117547263 A CN117547263 A CN 117547263A CN 202410048088 A CN202410048088 A CN 202410048088A CN 117547263 A CN117547263 A CN 117547263A
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- China
- Prior art keywords
- needle
- wall
- tube
- head
- deformation block
- Prior art date
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- 210000003462 vein Anatomy 0.000 title claims abstract description 39
- 239000008280 blood Substances 0.000 claims abstract description 32
- 210000004369 blood Anatomy 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 61
- 230000008859 change Effects 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract 1
- 210000004204 blood vessel Anatomy 0.000 description 16
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000035515 penetration Effects 0.000 description 4
- 238000010241 blood sampling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002439 hemostatic effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- 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
- A61B5/150175—Adjustment of penetration depth
- A61B5/15019—Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism
-
- 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
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150503—Single-ended needles
-
- 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
Abstract
The invention relates to the technical field of medical appliances, in particular to a puncture needle for deep veins. The needle is coaxially arranged with the needle tube, the needle is movably connected with the needle tube, a retraction piece is arranged in the movably connected area of the needle and the needle tube, and the retraction piece is used for controlling the needle to retract and move towards the needle tube; the retraction member comprises a deformation block which is plastically deformed when encountering a volume of liquid substance. The needle head and the needle tube are movably connected, and a retraction piece is added to enable the needle head to retract towards the needle tube. The deformation block has the characteristic of swelling when meeting water, the deformation block is arranged in an annular gap between the needle head and the needle tube, after the needle head enters into a deep vein, blood can enter the needle tube through the needle head, after the deformation block is contacted, the deformation block deforms and expands, and under the action of the deformation block, the needle head can retract towards the needle tube, so that the condition that the needle head punctures the vein is avoided.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a puncture needle for deep veins.
Background
The deep vein puncture is a common clinical treatment means at present, generally, when puncture blood sampling is carried out, a puncture needle is inserted into a blood vessel of a patient, the tail part of the puncture needle can be connected with a syringe, so that blood in the blood vessel flows into the syringe through the puncture needle, and the collection of blood samples is sequentially completed.
Although the blood collection can be facilitated by adopting the deep venipuncture to collect blood, the inventor finds that the existing puncture needle has the following defects in the process of actually using the puncture needle:
in the process of needle moving, the deep venipuncture position of medical staff is deeper than the surface of the body, so that the requirement on the puncture angle is higher, the needle inserting speed and the force are also higher, the puncture difficulty is high, the requirement is high, and the medical staff usually needs to perform the puncture operation with abundant experience;
in the puncturing process, the hand feeling of the medical staff is one of the important guarantees of ensuring the puncture success, however, if the hand feeling of the medical staff is poor or the puncturing force is too large, the risk that the needle head of the puncture needle punctures the vein can occur, so that the vein puncture is failed.
Therefore, in view of the above-mentioned shortcomings, there is a need to design a puncture needle for deep veins to avoid the puncture needle from puncturing the vein.
Disclosure of Invention
The invention aims at: aiming at the phenomenon that a puncture needle can puncture a vein in the deep vein puncture process at present, the puncture needle for the deep vein is provided.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the puncture needle for the deep vein comprises a needle head and a needle tube, wherein the needle head is coaxially arranged with the needle tube, the needle head is movably connected with the needle tube, the needle head is sleeved on the outer wall of the needle tube, and the inner wall of the needle head and the outer wall of the needle tube form a first channel; the area where the needle head is movably connected with the needle tube is provided with a retraction assembly, and the retraction assembly is used for controlling the needle head to retract and move towards the needle tube;
the retraction assembly comprises a deformation block, the deformation block can generate plastic deformation when encountering the volume of liquid substances, and blood enters the needle head, contacts with the deformation block through the first channel and triggers the volume change of the deformation block, so that the deformation block pushes the needle head to retract towards the needle tube.
According to the technical scheme, the needle head and the needle tube which are movably connected are designed, and the retraction piece is additionally arranged, so that the needle head can be controlled to retract towards the needle tube. The retraction assembly comprises a deformation block, wherein the deformation block has the characteristic of expanding when meeting water, the deformation block is arranged in an annular gap between the needle head and the needle tube, when the needle head enters into a deep vein, blood can enter the needle tube through the needle head, after the deformation block is contacted, the deformation block deforms and expands, and under the action of the deformation block, the needle head can retract towards the needle tube, so that the condition that the needle head punctures the vein is avoided.
As the preferable technical scheme of the invention, the retraction assembly comprises a connecting sleeve, wherein the connecting sleeve is arranged on the circumference of the outer wall of the needle tube, the connecting sleeve is cylindrical, an annular chute is arranged between the connecting sleeve and the outer wall of the needle tube, the needle head is sleeved on the outer wall of the needle tube, and the side wall of the needle head is clamped in the annular chute. Specifically, the connecting sleeve is fixedly connected with the tail part of the needle tube, an accommodating space of the tube wall of the needle head is formed between the connecting sleeve and the outer wall of the middle section of the needle tube, and the tube wall of the needle head can reciprocate in the annular accommodating space along the length direction of the needle tube.
As the preferable technical scheme of the invention, the retraction assembly further comprises a blocking matching assembly, the blocking matching assembly comprises a first blocking piece and a second blocking piece, the first blocking piece is arranged at the end part of the needle head, which is far away from the needle point, the first blocking piece is arranged on the outer wall of the needle head, the second blocking piece is arranged at the top outer wall of the needle tube, and the second blocking piece and the connecting sleeve are integrally formed.
As a preferable technical scheme of the invention, the second blocking piece is arranged annularly to the outer wall of the needle tube, the second blocking piece is positioned in the orthographic projection area of the annular chute, and a first annular gap for accommodating the tube wall of the needle tube is arranged between the second blocking piece and the outer wall of the needle tube. The clamping and blocking matching components are used for limiting the needle tube and the needle head on one hand and preventing the needle head from falling out of the needle tube, and are used for accommodating the deformation block on the other hand, when the deformation block is expanded by blood, the deformation block can be used as the aid of retraction of the needle head through the fixed second clamping and blocking block to push the first clamping and blocking block to move towards the tail end direction of the needle tube.
As a preferable technical scheme of the invention, the first blocking piece is an annular sliding block arranged on the outer wall of the needle head, or a plurality of sliding blocks independently arranged on the outer wall of the needle head, and when the sliding blocks are a plurality of independent sliding blocks, a plurality of sliding blocks are circumferentially arranged at intervals along the outer wall of the needle head.
As a preferable mode of the present invention, the deformation block is in a ring shape, and the deformation block is disposed in a region between the first blocking piece and the second blocking piece.
According to the more preferable technical scheme, when the sliding block is a plurality of independent sliding blocks, the sliding block forms a limit with the second blocking piece on one hand to prevent the needle head from falling off the needle tube, and secondly, the blocking piece can limit the position of the annular deformation block, so that the annular deformation block is blocked in the area between the first blocking piece and the second blocking piece. In the use, before the syringe needle does not puncture the blood vessel, initial state is that overlap area is minimum between syringe needle and the pipe wall of needle tubing, deformation piece and the position butt of second card keep off the piece, deformation piece is initial shape, after gathering blood, blood can pass the needle tubing along the syringe needle, wherein, partial blood can contact deformation piece from the first passageway between syringe needle and the needle tubing, deformation piece is after meetting blood, the expansion takes place, deformation piece can push up second card keep off the piece this moment, under the reaction force of second card keep off the piece, deformation piece can drive the syringe needle and remove to the tail end direction of needle tubing, thereby avoided the lateral wall of syringe needle puncture blood vessel, the condition of causing the blood vessel to pierce through.
Preferably, the deformation block is water-absorbent resin, and when the deformation block contacts human blood, the deformation block can absorb water and expand to drive the needle head to move towards the direction close to the needle tube. The deformation block can deform in the first direction and the second direction, the first direction is defined to be the same as the axial direction of the needle tube, the second direction is perpendicular to the axial direction of the needle tube, when the deformation block deforms in the second direction, the deformation block can apply force for outwards expanding the connecting sleeve, so that the interference fit mode between the side wall of the needle head and the connecting sleeve is changed into clearance fit, and the retraction resistance of the needle head is reduced.
As another preferable technical scheme, the retraction assembly comprises a connecting sleeve, the connecting sleeve is arranged on the circumference of the outer wall of the needle tube, an annular groove is formed in the connecting sleeve, a first clamping block is arranged on the outer wall of the needle head, and the first clamping block is in butt joint with the inner wall of the annular groove.
As the preferable technical scheme of the invention, the rubber sleeve is circumferentially arranged on the outer wall of the needle, one end of the rubber sleeve, which is close to the needle point, is fixedly connected with the outer wall of the needle, one end of the rubber sleeve, which is close to the needle tube, is fixedly arranged with the connecting sleeve, a second annular gap is arranged between the rubber sleeve and the side wall of the needle, the rubber sleeve has elasticity, and the rubber sleeve can be folded when the needle is retracted towards the needle tube.
Preferably, the wall thickness of the rubber sleeve gradually increases from the needle head to the needle tube, and the rubber sleeve is in a horn shape in the circumferential direction of the needle head when the needle head is at the maximum retraction displacement. The rubber sleeve is made of flexible materials, a gap is reserved between the rubber sleeve and the outer wall of the needle, and when the needle is retracted, the rubber sleeve at the top of the needle can be turned inwards along with the retraction of the needle, and a horn mouth shape is formed around the outer wall of the needle. As a preferable technical scheme of the invention, the wall thickness of the rubber sleeve gradually increases from the needle head to the needle tube. After the rubber sleeve is folded, the diameter of the rubber sleeve is increased, a limiting piece can be formed, movement of the penetration part of the puncture needle is limited, and stability of the puncture needle in a vein can be improved. In the process of withdrawing the puncture needle from the patient, the folded rubber sleeve has elasticity, and the folded direction is matched with the moving direction of the puncture needle during withdrawing, so that the anti-blocking and hemostatic effects can be achieved, and the blood in the blood vessel can be prevented from seeping out from the puncture channel.
As a preferable technical scheme of the invention, the length of the annular chute along the needle tube is h, the length of the annular chute is used for restraining the maximum retraction amount of the needle head when the needle head moves relative to the needle tube, and when the needle head is in the maximum retraction amount, any area on the needle head is positioned in the rubber sleeve.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
based on the technical defect that in the prior art, a puncture needle enters the opposite side of a vein in the deep vein puncture process to cause the condition of vein penetration or the risk of needle withdrawal caused by the fact that a needle is penetrated deep in the vein blood sampling process, the invention provides a puncture needle with a retractable needle, which is capable of controlling the needle to retract towards the needle tube by designing a needle head and a needle tube which are movably connected and adding a retraction piece. The retraction assembly comprises a deformation block, wherein the deformation block has the characteristic of expanding when meeting water, the deformation block is arranged in an annular gap between the needle head and the needle tube, when the needle head enters into a deep vein, blood can enter the needle tube through the needle head, after the deformation block is contacted, the deformation block deforms and expands, and under the action of the deformation block, the needle head can retract towards the needle tube, so that the condition that the needle head punctures the vein is avoided.
According to the technical scheme, the retraction assembly comprises the clamping and blocking matching assembly which is used for accommodating the deformation block, so that when the deformation block expands when encountering blood, the first clamping and blocking block can be pushed to move towards the tail end direction of the needle tube by taking the fixed second clamping and blocking block as the aid of needle retraction. And the limit can be formed mutually, so that the needle head is prevented from falling off the needle tube.
According to the technical scheme, the rubber sleeve is arranged on the needle, and can be turned inwards along with retraction of the needle, so that a horn mouth shape is formed around the outer wall of the needle. The wall thickness of the rubber sleeve gradually increases from the needle head to the needle tube. After the rubber sleeve is folded, the diameter of the rubber sleeve is increased, a limiting piece can be formed, movement of the penetration part of the puncture needle is limited, and stability of the puncture needle in a vein can be improved. In the process of withdrawing the puncture needle from the patient, the folded rubber sleeve has elasticity, and the folded direction is matched with the moving direction of the puncture needle during withdrawing, so that the anti-blocking and hemostatic effects can be achieved, and the blood in the blood vessel can be prevented from seeping out from the puncture channel.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the needle cannula of the present invention (wherein (a) and (b) in FIG. 2 are two different needle cannula structures);
FIG. 3 is a schematic view of the structure of the needle of the present invention (without the addition of a rubber boot);
FIG. 4 is a cross-sectional view of the B-B side of FIG. 1 of the present invention;
FIG. 5 is a schematic top view of the needle and needle cannula of the present invention mated;
fig. 6 is an enlarged view of a portion a in fig. 1;
FIG. 7 is an exploded view of the lancet of the present invention;
FIG. 8 is a view showing the state change of the puncture needle after the deformation block of the present invention is expanded from small;
FIG. 9 is a schematic view showing an initial state of the puncture needle of the present invention entering a blood vessel;
FIG. 10 is a schematic view showing the state of the puncture needle according to the present invention after being retracted in a blood vessel;
FIG. 11 is a schematic view showing another structure of the puncture needle of the present invention;
FIG. 12 is a schematic view showing another structure of the puncture needle of the present invention;
icon: 100-blood; 101-vessel wall; 1-a needle; 11-needle tip; 2-needle tube; 21-groove, 3-retraction assembly; 31-deformation blocks; 32-connecting sleeve; 4-an annular chute; 33-a first catch; 34-a second catch; 5-a first annular gap; 6-rubber sleeve; 7-second annular gap, 8-annular groove.
Detailed Description
In order to more clearly describe the objects, technical solutions and technical advantages of the present invention in the specific embodiments, the following detailed description of the embodiments will be given with reference to the accompanying drawings of the present invention. The following specific examples relate to the specific technical solutions only for the purpose of clearly and completely describing the innovative technical solution of the present invention, and are themselves only some, but not all, examples of the specific embodiments that the present invention may employ and are not to be construed as limiting the innovative solutions of the present invention. Any solution employing the same inventive concept should be included in the scope of protection of the present invention.
The present invention will be described in detail with reference to the accompanying drawings.
Example 1
The embodiment provides a puncture needle for deep vein, which is particularly shown in figures 1-8 and comprises a needle head 1 and a needle tube 2, wherein the needle head 1 and the needle tube 2 are coaxially arranged, the needle head 1 is movably connected with the needle tube 2, the needle head 1 is sleeved on the outer wall of the needle tube 2, and a first channel is formed by the inner wall of the needle head 1 and the outer wall of the needle tube 2; the area where the needle head 1 and the needle tube 2 are movably connected is provided with a retraction assembly 3, and the retraction assembly 3 is used for controlling the needle head 1 to retract and move towards the needle tube 2; the retraction assembly 3 comprises a deformation block 31, the deformation block 31 can be subjected to plastic deformation when encountering the volume of liquid substances, and blood 100 contacts with the deformation block 31 through the first channel after entering the needle 1 and triggers the volume change of the deformation block 31, so that the deformation block 31 pushes the needle 1 to retract towards the needle tube 2.
In the technical scheme of the embodiment, the needle 1 and the needle tube 2 which are movably connected are designed, and the retraction assembly 3 is added to enable the needle 1 to retract towards the needle tube 2. In this embodiment, the deformation block 31 has the characteristic of expanding when encountering water, the deformation block 31 is arranged in the annular gap between the needle 1 and the needle tube 2, when the needle 1 enters into a deep vein, the blood 100 enters into the needle tube 2 through the needle 1, and when the deformation block 31 is contacted, the deformation block 31 deforms and expands, and under the action of the deformation block 31, the needle 1 retracts towards the needle tube 2, so that the condition that the needle 1 punctures the vein is avoided.
As a preferred embodiment, the length of the needle 1 is smaller than the length of the needle tube 2, ensuring that the needle 1 is fully retracted into the needle tube 2 under the drive of the deformation block 31.
As a preferred implementation manner of this embodiment, the retraction assembly 3 includes a connecting sleeve 32, the connecting sleeve 32 is disposed on the circumference of the outer wall of the needle tube 2, the connecting sleeve 32 is cylindrical, an annular chute 4 is disposed between the connecting sleeve 32 and the outer wall of the needle tube 2, the needle 1 is sleeved on the outer wall of the needle tube 2, and the side wall of the needle 1 is clamped in the annular chute 4. Specifically, the connecting sleeve 32 is fixedly connected with the tail part of the needle tube 2, an accommodating space of the tube wall of the needle head 1 is formed between the connecting sleeve 32 and the outer wall of the middle section of the needle tube 2, and the tube wall of the needle head 1 can reciprocate in the annular accommodating space along the length direction of the needle tube 2.
Specifically, the connecting sleeve 32 is fixedly connected with the tail part of the needle tube 2, an accommodating space of the side wall of the needle head 1 is formed between the connecting sleeve 32 and the outer wall of the middle section of the needle tube 2, and the tube wall of the needle head 1 can reciprocate in the annular accommodating space along the length direction of the needle tube 2.
More preferably, the retraction assembly 3 further comprises a catch matching assembly, the catch matching assembly comprises a first catch piece 33 and a second catch piece 34, the first catch piece 33 is arranged at the end position of the needle head 1 away from the needle tip 11, the first catch piece 33 is arranged at the outer wall of the needle head 1, the second catch piece 34 is arranged at the top outer wall position of the needle tube 2, and the second catch piece 34 and the connecting sleeve 32 are integrally formed. More specifically, the width of the first blocking member 33 is adapted to the annular chute 4, so that the movement of the needle 1 along the length direction of the needle tube 2 is ensured, and meanwhile, the relative stability between the needle 1 and the needle tube 2 is ensured.
The second blocking piece 34 is arranged on the outer wall of the needle tube 2 in a circular way, the second blocking piece 34 is positioned in the orthographic projection area of the annular chute 4, and a first annular gap 5 for accommodating the tube wall of the needle head 1 is arranged between the second blocking piece 34 and the outer wall of the needle tube 2. The clamping and blocking matching components are used for limiting the needle tube 2 and the needle head 1 on one hand and preventing the needle head 1 from being separated from the needle tube 2, and are used for accommodating the deformation block 31 on the other hand, when the deformation block 31 is expanded when encountering the blood 100, the deformation block can be used as the aid of retraction of the needle head 1 through the fixed second clamping block to push the first clamping block to move towards the tail end direction of the needle tube 2.
The first blocking piece 33 is an annular sliding block arranged on the outer wall of the needle head 1, or a plurality of sliding blocks independently arranged on the outer wall of the needle head 1, and when the sliding blocks are a plurality of independent sliding blocks, a plurality of sliding blocks are circumferentially arranged at intervals along the outer wall of the needle head 1.
As a preferable embodiment of the present invention, the deformation block 31 has an annular shape, and the deformation block 31 is disposed in a region between the first catch 33 and the second catch 34. The deformation block 31 is a water-absorbing resin, i.e. an expansion resin film, and when the deformation block 31 contacts the human blood 100, the deformation block 31 can absorb water and expand to drive the needle 1 to move towards the direction close to the needle tube 2.
In a preferred embodiment, when the slider is a plurality of independent sliders, the slider forms a limit with the second blocking member 34 to prevent the needle 1 from falling off the needle tube 2, and the blocking member can define the position of the annular deformation block 31 so as to be blocked in the area between the first blocking member 33 and the second blocking member 34. In the use process, before the needle 1 does not puncture a blood vessel, the initial state is that the overlapping area between the needle 1 and the tube wall of the needle tube 2 is minimum, the deformation block 31 is abutted against the position of the second blocking piece 34, the deformation block 31 is in an initial shape, no deformation occurs, after the blood 100 is collected, the blood 100 can pass through the needle tube 2 along the needle 1, wherein part of the blood 100 can contact the deformation block 31 from a first channel between the needle 1 and the needle tube 2, the deformation block 31 expands after encountering the blood 100, at the moment, the deformation block 31 can push the second blocking piece 34, and under the action of the reaction force of the second blocking piece 34, the deformation block 31 can drive the needle 1 to move towards the tail end direction of the needle tube 2, so that the condition that the needle 1 punctures the blood vessel wall 101 of the blood vessel and causes the condition of penetrating the blood vessel is avoided. In this embodiment, the first blocking member 33 includes four symmetrical sliders.
As a more preferred embodiment, the needle tube is provided with a plurality of grooves 21 at intervals along the circumferential side wall of the needle tube at a position close to the end of the needle head, and the grooves 21 comprise a first surface and a second surface, wherein the first surface is the outer side wall of the needle tube, the second surface is the inner side wall of the needle tube, and the grooves are recessed towards the second surface through the first surface. As shown in fig. 2 (b).
As a preferred implementation manner of this embodiment, the outer wall circumference of the needle 1 is provided with a rubber sleeve 6, one end of the rubber sleeve 6 close to the needle tip 11 is fixedly connected with the outer wall of the needle 1, one end of the rubber sleeve 6 close to the needle tube 2 is fixedly arranged with the connecting sleeve 32, a second annular gap 7 is formed between the rubber sleeve 6 and the side wall of the needle 1, the rubber sleeve 6 has elasticity, and the rubber sleeve 6 can be folded when the needle 1 retracts towards the needle tube 2. The wall thickness of the rubber sleeve 6 gradually increases from the needle head 1 to the needle tube 2, and when the needle head 1 is at the maximum retraction displacement, the rubber sleeve 6 is in a horn shape in the circumferential direction of the needle head 1. The rubber sleeve 6 is made of flexible materials, a gap is reserved between the rubber sleeve and the outer wall of the needle head 1, and when the needle head 1 is retracted, the rubber sleeve 6 at the top of the needle head 1 can be folded inwards along with the retraction of the needle head 1, and a horn mouth shape is formed around the outer wall of the needle head 1. As a preferable embodiment of the present invention, the wall thickness of the rubber sleeve 6 gradually increases from the needle 1 to the needle tube 2. After the rubber sleeve 6 is folded, the diameter of the rubber sleeve is increased, a limiting piece can be formed, movement of the penetration part of the puncture needle is limited, and stability of the puncture needle in a vein can be improved. In the process of withdrawing the puncture needle from the patient, the folded rubber sleeve 6 has elasticity, and the folded direction is matched with the moving direction of the puncture needle during withdrawing, so that the puncture needle can play a role in blocking prevention and hemostasis, and the blood 100 in the blood vessel can be prevented from seeping out from the puncture channel.
As a preferred embodiment, the length of the annular chute 4 along the needle tube 2 is h, the length of the annular chute 4 is used for restraining the maximum retraction amount of the needle 1 when moving relative to the needle tube 2, and when the needle 1 is at the maximum retraction amount, any area on the needle 1 is located in the rubber sleeve 6.
Example 2
Embodiment 2 provides a puncture needle structure, the operating principle of which is basically the same as that of embodiment 1, and the difference is only that the structure of the needle tube 2, as shown in fig. 11, the retraction assembly 3 includes a connecting sleeve 32, the connecting sleeve 32 is disposed on the circumference of the outer wall of the needle tube 2, an annular groove 8 is disposed in the connecting sleeve 32, a first blocking member 33 is disposed on the outer wall of the needle 1, and the first blocking member 33 abuts against the inner wall of the annular groove 8. The top of the connecting sleeve 32 is provided with a second concave blocking piece 34, and the second blocking piece 34 is matched with the first blocking piece 33 to prevent the needle head 1 from being separated from the connecting sleeve 32. In this embodiment, the height of the needle cannula 2 is lower than the height of the connection sleeve 32. The needle 1 is retracted in the length direction of the connector.
Example 3
The operation principle of this embodiment is basically the same as that of embodiment 1, and only the difference is that the structure of the needle tube 2 is provided in this embodiment, the inner wall of the needle tube 2 is a reducing structure, the top of the needle tube 2 is provided with a second concave blocking piece 34, the inner diameter of the upper section of the needle tube 2 is larger than that of the lower section, and the upper part of the needle tube 2 is used for retracting the needle head 1 towards the lower end of the needle tube 2, as shown in fig. 12. The bottom of the rubber sleeve 6 is fixedly connected with the top or the side wall of the top of the needle tube 2.
The procedure of deep vein puncture will be described below with reference to the specific construction of the puncture needle of the above embodiment 1, and the sharp end of the needle head 1 pierces the tissue to insert the needle into the deep vein, as shown in fig. 9 to 10, and the rubber boot 6 is inserted together with the needle head 1, and the right-most puncture needle in fig. 1 is in the needle insertion state during the needle insertion. The whole enters the blood vessel, and a part of the needle tube 2 also enters the blood vessel. When blood 100 enters needle tube 2 from needle 1, a part of blood 100 can infiltrate into the position of deformation block 31, deformation block 31 deforms, and needle 1 is driven to retract towards needle tube 2. The state of fig. 9 is formed. When the operation is completed, the puncture needle is taken out, and the state of fig. 10 is obtained. Taking out the whole.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A puncture needle for deep vein, which is characterized by comprising a needle head (1) and a needle tube (2), wherein the needle head (1) and the needle tube (2) are coaxially arranged, the needle head (1) and the needle tube (2) are connected through a retraction assembly (3), and the retraction assembly (3) is used for controlling the needle head (1) to retract and move towards the needle tube (2); the retraction assembly (3) comprises a deformation block (31), wherein the deformation block (31) can generate plastic deformation when encountering the volume of liquid substances, so that the deformation block (31) pushes the needle head (1) to retract towards the needle tube (2), and when blood enters the needle head (1), the blood contacts with the deformation block (31) and triggers the volume change of the deformation block (31);
the deformation block (31) is in an annular shape, the deformation block (31) is arranged on the retraction assembly (3), the deformation block (31) is made of water-absorbent resin, and after the deformation block (31) contacts human blood, the deformation block (31) can absorb water and expand to drive the needle head (1) to move towards the direction close to the needle tube (2);
the outer wall circumference of syringe needle (1) is provided with rubber sleeve (6), one end that rubber sleeve (6) is close to needle point (11) with syringe needle (1) outer wall fixed connection, rubber sleeve (6) is close to one end of needle tubing (2) with adapter sleeve (32) are fixed to be set up, rubber sleeve (6) with have second annular gap (7) between the lateral wall of syringe needle (1), rubber sleeve (6) have elasticity, rubber sleeve (6) can turn over when syringe needle (1) are retracted to needle tubing (2) direction.
2. The puncture needle for deep vein according to claim 1, wherein the retraction assembly (3) comprises a connecting sleeve (32), the connecting sleeve (32) is arranged on the circumference of the outer wall of the needle tube (2), the connecting sleeve (32) is cylindrical, an annular chute (4) is arranged between the connecting sleeve (32) and the outer wall of the needle tube (2), the needle head (1) is sleeved on the outer wall of the needle tube (2), and the side wall of the needle head (1) is clamped in the annular chute (4).
3. The puncture needle for deep vein according to claim 2, wherein the retraction assembly (3) further comprises a blocking matching assembly, the blocking matching assembly comprises a first blocking piece (33) and a second blocking piece (34), the first blocking piece (33) is arranged at the end position of the needle head (1) far away from the needle point (11), the first blocking piece (33) is arranged on the outer wall of the needle head (1), the second blocking piece (34) is arranged at the top of the connecting sleeve (32), and the second blocking piece (34) and the connecting sleeve (32) are integrally formed.
4. A puncture needle for deep vein according to claim 3, characterized in that the second blocking piece (34) is arranged annularly to the outer wall of the needle tube (2), the second blocking piece (34) is located in the orthographic projection area of the annular chute (4), and a first annular gap (5) for accommodating the tube wall of the needle head (1) is arranged between the second blocking piece (34) and the outer wall of the needle tube (2).
5. A puncture needle for deep vein according to claim 3, characterized in that the first blocking member (33) is an annular slider provided on the outer wall of the needle head, or a plurality of sliders provided independently on the outer wall of the needle head, and when the sliders are a plurality of independent sliders, a plurality of sliders are provided at intervals along the circumference of the outer wall of the needle head.
6. The puncture needle for deep vein according to claim 1, characterized in that the retraction assembly (3) comprises a connecting sleeve (32), the connecting sleeve (32) is arranged on the circumference of the outer wall of the needle tube (2), an annular groove (8) is arranged in the connecting sleeve (32), a first blocking piece is arranged on the outer wall of the needle head, and the first blocking piece is abutted against the inner wall of the annular groove (8).
7. A puncture needle for deep vein according to claim 1 or 6, characterized in that the wall thickness of the rubber sleeve (6) gradually increases from the needle (1) to the needle tube (2), the rubber sleeve (6) being flared in the circumferential direction of the needle (1) when the needle (1) is at maximum retraction displacement.
8. A puncture needle for deep veins according to claim 7, characterized in that the length of retraction of the needle (1) is h, and that any area on the needle (1) is located within the rubber sleeve (6) when the needle (1) is at maximum retraction.
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| CN202410048088.8A CN117547263B (en) | 2024-01-12 | 2024-01-12 | Puncture needle for deep vein |
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| CN202410048088.8A CN117547263B (en) | 2024-01-12 | 2024-01-12 | Puncture needle for deep vein |
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| CN117547263B CN117547263B (en) | 2024-03-19 |
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|---|---|
| CN117547263B (en) | 2024-03-19 |
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