CN218420537U - Hemodialysis needle with swing brake pad - Google Patents
Hemodialysis needle with swing brake pad Download PDFInfo
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- CN218420537U CN218420537U CN202221162605.7U CN202221162605U CN218420537U CN 218420537 U CN218420537 U CN 218420537U CN 202221162605 U CN202221162605 U CN 202221162605U CN 218420537 U CN218420537 U CN 218420537U
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Abstract
The utility model discloses a hemodialysis needle with swing brake lining, it is including keeping somewhere pipe subassembly and pjncture needle tube assembly, the pipe subassembly of keeping somewhere include hose, pipe seat, elasticity nozzle stub, connecting seat, swing brake lining and sealed jam, hose one end the toper has, the other end of hose links to each other with the one end of pipe seat, the both ends of elasticity nozzle stub respectively with pipe seat and connecting seat sealing connection, the elasticity nozzle stub is located the inner chamber of pipe seat and connecting seat, the one end of connecting seat links to each other with the pipe seat, sealed jam sets up in the other end of connecting seat, the swing brake lining articulates the surface at the connecting seat, the swing brake lining can follow connecting seat axis direction luffing motion. The utility model discloses when using, need not manual oppression blood vessel and block the blood flow, can realize preventing the blood outflow, easy operation, convenient to use safety.
Description
Technical Field
The utility model relates to a dialysis needle, in particular to a hemodialysis needle with a swinging brake pad.
Background
At present, when the domestic hemodialysis treatment is carried out, a puncture needle is generally used, wherein one end of the puncture needle is a puncture steel needle, one end of the steel needle is connected with a long catheter, and the other end of the long catheter is connected with a connector. When the steel needle is used for being left in a blood vessel after puncture, limbs need to be fixed, the limb puncture is not allowed to move, otherwise, the needle point of the steel needle is extremely easy to puncture the blood vessel, particularly for unconscious patients or elderly patients, subcutaneous hematoma and blood vessel injury at the puncture position can be caused once the blood vessel is punctured, and the pain of the patient and the difficulty of the next puncture are increased. The open end of the catheter holder is lack of a blocking device, so that the needle tube can be withdrawn only by timely carrying out vascular compression to block blood flow before the needle tube is withdrawn after puncture, and the open end of the needle tube cannot be relaxed before being connected with a hemodialysis machine. Therefore, there is a great need to design a new type of puncture needle that avoids the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a hemodialysis needle which can avoid the blood vessel damage caused by the movement of the punctured limbs of the patient when being kept,
a hemodialysis needle with a swing brake pad comprises an indwelling catheter component and a puncture needle component, wherein the indwelling catheter component comprises a hose, a catheter seat, an elastic short pipe, a connecting seat, the swing brake pad and a sealing stopper, one end of the hose is conical, the hose at the conical end is provided with a plurality of small holes communicating the inner wall and the outer wall of the hose, the other end of the hose is connected with one end of the catheter seat, two ends of the elastic short pipe are respectively connected with the catheter seat and the connecting seat in a sealing manner, the elastic short pipe is positioned in an inner cavity of the catheter seat and the connecting seat, the elastic short pipe between the catheter seat and the connecting seat is in a free state so as to facilitate the pressing deformation of the swing brake pad on the elastic short pipe, one end of the connecting seat is connected with the catheter seat, the sealing stopper is arranged at the other end of the connecting seat, the swing brake pad is hinged on the outer surface of the connecting seat, the swing brake pad can swing back and forth along the axial direction of the connecting seat, the swing brake pad is divided into a long section and a short section at the hinged point, the short pipe, the short section and the short section have an angle, the swing brake pad is upward when the swing brake pad, the short section of the swing brake pad is positioned, the connecting seat, the corresponding connecting seat is provided with a normal state that the pipe wall of the short pipe extends into the tube and presses the pipe to deform the pressing hole of the short pipe; the puncture needle tube assembly comprises a puncture needle tube and a transparent needle base, and the needle head of the puncture needle tube is exposed out of the tip end of the hose when penetrating into the hose of the indwelling catheter assembly.
The swing brake sheet is provided with a positioning device for positioning the swing brake sheet on the connecting seat.
The positioning device comprises a convex card or a clamping hook which is positioned on the side of the hinge point of the connecting seat without the extrusion hole, and a groove or a clamping hole which is matched with the convex card for use is arranged on the long section of the swinging brake pad.
Corresponding positioning devices are arranged on the long section of the swing brake pad and the connecting seat, so that the swing brake pad can be ensured to be in a fixed state when the swing brake pad is in a normal state and does not work.
The positioning device also comprises a clamping hook arranged at one side of the connecting seat with the extrusion hole, and a clamping hook or a clamping groove matched with the clamping hook on the connecting seat is arranged at one side of the swinging brake sheet with the same direction as the short sheet.
The positioning device can ensure that the swing brake pad can realize positioning and maintaining when being in a working state, namely in an extrusion state, and does not need manual maintaining.
The connecting seat is connected with the sealing plug, an inner luer connector is arranged in an inner cavity of the connecting seat, and an outer luer connector is configured on the sealing plug.
One end of the sealing plug is provided with an external luer connector, the other end of the sealing plug is a thin-walled cylinder, a spacer is arranged between the external luer connector and the thin-walled cylinder, a self-closing needle penetrating hole is arranged in the middle of the spacer, and a sealing element is further arranged between the external luer connector and the spacer.
The thin-wall cylinder end of the sealing device is also provided with a connecting device which is matched with the puncture needle tube component for use.
The connecting device at the thin-wall cylinder end is an inverted U-shaped groove, and an axial groove of the inverted U-shaped groove is communicated with the cylinder end to form an opening sliding groove.
The puncture needle tube assembly further comprises a puncture needle tube penetration preventing device, the puncture needle tube penetration preventing device comprises a connector, a connector rear cover, an eccentric stop dog, a stop catch and a stop card, one end of the connector can be embedded into a sealed and blocked thin-walled cylinder inner cavity of the indwelling needle tube assembly when the puncture needle tube assembly is used, the connector is a tubular body with one closed end and one open end, a needle hole is formed in the closed end, one end of the connector rear cover is embedded into an inner cavity of an open end of the connector, the eccentric stop dog and the stop catch are arranged in the inner cavity of the connector, the eccentric stop dog and the stop catch are close to the closed end of the inner cavity of the connector, the stop catch is positioned at the end of the connector rear cover, the stop catch is arranged at the closed end of the inner cavity of the connector rear cover, the connector rear cover is a tubular body with one closed end, the closed end of the connector rear cover is provided with a needle hole, the eccentric stop dog, the stop dog and the stop catch are arranged on the stop dog and the stop card, a part of the connector rear cover is embedded into the inner cavity of a transparent needle seat, a luer connector is arranged at the other end of the transparent needle seat, a puncture needle seat is fixedly connected with a puncture needle tube, and a middle section of the puncture needle seat, and an exhaust end of the needle seat is arranged in the middle section of the needle tube fixedly connected with a transparent needle seat.
The end part of the connector matched with the sealing plug is provided with a connecting device connected with the sealing plug.
The connecting device on the connector is a convex card which can be clamped into the sealing and blocking U-shaped groove.
The connector is also provided with a clamping hole matched with the connector rear cover, and the connector rear cover is provided with a corresponding clamping convex card.
A shoulder for assembling and positioning the transparent needle base is also arranged on the periphery of the connector.
And a stop flange for positioning the end face of the connector is arranged on the periphery of the connector rear cover.
To sum up, the utility model discloses compare prior art following advantage:
the utility model discloses when using, in puncture needle tubing penetrated the blood vessel together with the hose tip, the puncture needle tubing of withdrawing from owing to keeping somewhere the tubing assembly other end and having disposed sealed blocking for blood can not flow outward, need not to recompress the blood vessel and block the blood flow, easy operation, convenient to use safety. During the indwelling use period, if the sealing blockage needs to be replaced, the brake pad can be swung to make the elastic short pipe deform, and the inner cavity wall is tightly attached to the closed state to block the communication between the inner cavity of the indwelling hose assembly and the outside, so that the sealing blockage can be conveniently replaced.
Drawings
Fig. 1 is a schematic structural view of a hemodialysis needle with a swinging shutter according to an embodiment of the present invention.
Fig. 2 is a sectional view of fig. 1.
Figure 3 is a schematic view of the structure of the indwelling needle assembly.
Fig. 4 is a cross-sectional view of fig. 3.
Fig. 5 is a schematic view of the spike assembly.
Fig. 6 is a schematic view of a catheter hub configuration.
Figure 7 is a cross-sectional view of figure 6,
fig. 8 is a schematic view of the connecting seat.
Fig. 9 is a sectional view of fig. 8.
Fig. 10 is a schematic view of a swing gate.
Fig. 11 is a front view of fig. 10.
Fig. 12 is a schematic view of a seal block.
Fig. 13 is a cross-sectional view of fig. 12.
Fig. 14 is a schematic view of a connector.
Fig. 15 is a sectional view of fig. 14.
Fig. 16 is a schematic view of a connector rear cover.
Fig. 17 is a cross-sectional view of fig. 16.
Fig. 18 is a schematic view of a transparent needle holder.
Fig. 19 is a sectional view of fig. 18.
FIG. 20 is a schematic view of a vent plug.
Fig. 21 is a sectional view of fig. 20.
FIG. 22 is a schematic drawing showing the withdrawal of the puncture needle tube.
Fig. 23 is a sectional view of fig. 22.
FIG. 24 is a schematic view of the pendulum damper in a squeezed state.
Fig. 25 is a sectional view of fig. 24.
Detailed Description
The present invention will be described in more detail with reference to the following examples.
Example 1
A hemodialysis needle with a swing brake pad comprises an indwelling catheter component and a puncture needle component, wherein the indwelling catheter component comprises a hose, a catheter seat, an elastic short pipe, a connecting seat, a swing brake pad and a sealing stopper, one end of the hose is conical, the hose at the conical end is provided with a plurality of small holes communicated with the inner wall and the outer wall of the hose, the other end of the hose is connected with one end of the catheter seat, the two ends of the elastic short pipe are respectively connected with the catheter seat and the connecting seat in a sealing manner, the elastic short pipe is positioned in an inner cavity of the catheter seat and the connecting seat, the elastic short pipe between the catheter seat and the connecting seat is in a free state so as to facilitate the swing brake pad to press and deform the elastic short pipe, one end of the connecting seat is connected with the catheter seat, the sealing stopper is arranged at the other end of the connecting seat, the swing brake pad is hinged on the outer surface of the connecting seat, the swing brake pad can swing back and forth along the axial direction of the connecting seat, the swing brake pad is divided into a long section and a short section by a hinged point, the short section and a short section have an angle, the short section which is upward when the swing brake pad is downward, the corresponding connecting seat is provided with a pipe wall for pressing and deforming the short pipe; the puncture needle assembly further comprises a needle puncture needle assembly penetration preventing device, the needle puncture needle assembly penetration preventing device comprises a connector, a connector rear cover, an eccentric stop dog, a stop catch and a stop card, one end of the connector can be embedded into a sealed and blocked thin-walled cylinder inner cavity of an indwelling needle assembly when the puncture needle assembly penetration preventing device is used, the connector is a tubular body with one closed end and one open end, a needle hole is formed in the closed end, one end of the connector rear cover is embedded into an inner cavity of an open end of the connector, the eccentric stop dog and the stop catch are arranged in the inner cavity of the connector, the eccentric stop dog and the stop catch are close to the closed end of the inner cavity of the connector, the stop catch is positioned at the end of the connector rear cover and is arranged at the closed end of the inner cavity of the connector rear cover, the connector rear cover is a tubular body with one closed end and one open end, the closed end of the connector rear cover is provided with a needle hole, the eccentric stop dog, the stop dog and the stop catch are arranged on the stop dog and the stop card, a part of the connector rear cover is embedded into the inner cavity of a transparent needle seat, a needle hub is arranged at the other end of a needle seat, a needle hub fixedly connected with a puncture needle tube, and a flexible tube is arranged at the middle section of the puncture needle tube, and a flexible tube inserted into the tip of the needle tube which is arranged at the end of the needle tube which is inserted into the needle tube.
The detailed structure of each part of the utility model is as follows:
as shown in FIGS. 1 and 2, the catheter assembly comprises an indwelling catheter assembly 1 and an introducer needle assembly 2.
Indwelling catheter Assembly 2 is shown in FIGS. 3 and 4
The device consists of a hose 1.1, a conduit seat 1.2, an elastic short pipe 1.3, an inner Ruhr connecting seat 1.4, a swing brake pad 1.5 and a sealing block 1.6.
The hose 1.1 has a certain length needed for remaining in the blood vessel, one end of the hose is conical, a plurality of small holes communicated with the tube cavity are arranged on the tube wall to ensure the blood flow in the blood vessel at the tube end, and the other end of the hose is fixedly connected with the inner cavity of the catheter seat 1.2 by adopting an embedding injection molding mode, a cementing mode or a riveting mode.
Wherein the elastic short tube 1.3 has a certain length, two ends are respectively sealed and fixedly connected with the conduit seat 1.2 and the inner Ruhr connecting seat 1.4, and the short tube between the conduit seat 1.2 and the inner Ruhr connecting seat 1.4 is in a free state, so that the brake pad is convenient to press and deform.
The needle cannula assembly 2 is shown in fig. 5
The puncture needle comprises a puncture needle tube 2.1, a transparent needle base 2.2, a needle point penetration prevention device connector 2.3, a connector rear cover 2.4, a stop dog 2.5, a stop catch 2.6, a stop card 2.7 and an exhaust plug 2.8.
Wherein, a convex clamping point is arranged at a certain distance from the puncture end part of the puncture needle tube 2.1 to the needle point, so that the stop clamping piece 2.7 stops the needle tube to move backwards and is pulled out of the needle point penetration preventing device. The device for preventing the needle point from penetrating out consists of a connector 2.3, a connector rear cover 2.7, an eccentric stop dog 2.5, a stop catch 2.6 and a stop card 2.7. The vent plug 2.8 is composed of a plug body with a standard external luer connector at one end and a breathable film fixedly connected to the end face of a through hole in the plug body.
Catheter holder 1.2 as shown in fig. 6 and 7
1.2.1 is a fixed connection step;
1.2.2 is a semi-circular arc supporting plate extended from a fixed connection step;
1.2.3 is a cylindrical convex card;
1.2.4 is a hose fixing hole;
1.2.5 elastic short pipe fixing holes
Connecting seat 1.4 is shown in figures 8 and 9
1.4.1 is a fixing hole connected with the catheter base;
1.4.2 is a standard female luer;
1.4.3 is a fixed connection hole at the other end of the elastic short pipe;
1.4.4, a rectangular notch is formed on the large end wall of the connecting seat for the swinging movement of the swinging brake pad 1.5;
1.4.5, the lugs are arranged at the positions, which are at two sides of the notch 1.4.4 and have a certain distance from the opening end, the outer walls of the protruded large ends are symmetrically provided with lugs, rotating shaft holes are arranged on the lugs, and the hole shafts are vertical to the axis of the connecting seat;
1.4.6 hooks arranged at large-end steps
1.4.7 is a wing extending to two sides on the outer wall of the big end opposite to the big end gap of the connecting seat
The swinging brake pad 1.5 is shown in fig. 10 and 11
Has a certain width, can be arranged between the lugs on the connecting seat, and is a long and short right-angle bent sheet in the lateral direction.
1.5.1 is a swinging shaft protruding from two sides of the right-angle bent piece bending part;
1.5.2 brake lining with bent lining short segment and semi-circular lining end
1.5.3 arranging a card interface on the long segment of the bent sheet
1.5.4 is the inner wall of the bent piece, and a hook is arranged at a certain distance from the long piece end.
Seal plug 1.6 fig. 12, 13
The device consists of a standard screw tooth fastening external luer connector 1.6.1, a cavity with a spacer fixedly connected with the other end of the external connector, a thin-walled cylinder 1.6.2 with a needle-penetrating hole in the middle of the spacer and a sealing piece 1.6.3 clamped in a cavity between the two.
1.6.2.2 is an inverted U-shaped groove, wherein an axial groove is communicated with the cylinder end to form a sliding groove;
1.6.2.1 is an elastic convex card formed by an inverted U-shaped groove arranged on the thin-wall cylinder, and a clamping point protrudes out of the side wall of the sliding groove.
The connector 2.3 is shown in fig. 14 and 15
2.3.1 is a convex card
2.3.2 assembling symmetrical clamping holes
2.3.3 is a pinhole
Connector rear cover 2.4 as shown in fig. 16 and 17
2.4.1 assembling symmetrical clamping convex card
2.4.2 Assembly stop flanges
2.4.3 are through-pin holes
The needle seat 2.2 is as shown in fig. 18 and 19
2.2.1 is a puncture needle tube fixing hole;
2.2.2 is a standard thread tight female luer;
2.2.3 assembling and sleeving stepped holes;
the vent plug 2.8 is as shown in fig. 20 and 21
2.8.1 is a standard male luer fitting
2.8.2 breathable films
The utility model discloses an assembly process
1. The indwelling catheter assembly is assembled as shown in fig. 3 and 4: firstly, one end of an indwelling hose 1.1 is fixedly connected with a hose fixedly-connecting hole 1.2.4 on a catheter seat 1.2, then one end of an elastic short tube 1.3 is fixedly connected with an elastic short tube fixedly-connecting hole 1.2.5 on the catheter seat, the other end is fixedly connected with an elastic short tube fixedly-connecting hole 1.4.3 on a connecting seat 1.4, meanwhile, the fixedly-connecting hole 1.4.1 on the connecting seat is fixedly connected with a step 1.2.1 fixedly connected on the catheter seat in an inserting mode, then, the short piece end of a swinging brake piece 1.5 faces to a lug 1.4.5 on the connecting seat, a swinging shaft of the swinging brake piece is forcibly pressed into the lug upper mounting hole, the swinging brake piece is swung by the way, the long piece on the swinging brake piece is buckled into a cylindrical convex card 1.2.3 on the catheter seat, and finally, a sealing blocking plug 1.6 is screwed on the connecting seat to be connected with a standard internal luer interface, and the indwelling catheter assembly is completed.
2. The needle cannula assembly is assembled as shown in fig. 5: firstly, one end without a needle point penetrates through a needle hole 2.3.3 on a connector 2.3, an eccentric stop dog 2.5, a stop catch 2.6, a stop card 2.7 and a connector rear cover 2.4 are sequentially inserted into a needle tube, then the connector is buckled with the connector rear cover, and the needle point penetration preventing device is formed by the connector 2.3 eccentric stop dog 2.5, the stop catch 2.6, the stop card 2.7 and the connector rear cover 2.4. Then the needle tube is inserted into the needle base 2.2 to puncture the needle tube fixing hole 2.2.1, and tightly matched with the fixing hole, finally the standard screw thread on the needle base tightly fixes the inner Ruhr interface 2.2.2 plug to plug the vent plug, and then the needle point penetration preventing device is inserted into the needle base inner assembly stepped hole 2.2.3, so that the assembly of the puncture needle tube assembly is completed.
3. The hemodialysis needle is assembled as shown in fig. 1 and 2: and (3) enabling the needle point of the puncture needle tube assembly to penetrate through a sealing element in the sealing stopper on the indwelling catheter assembly, penetrate through the connecting seat, the elastic short tube, the inner cavity of the catheter seat and the lumen of the hose, enable the needle point to be exposed out of the tip of the hose, simultaneously enable a convex card which prevents the needle point from penetrating out of the connecting head on the device to be plugged into the inverted U-shaped sliding groove on the sealing stopper and clamped with the elastic convex card on the sealing stopper, and accordingly, the assembly of the hemodialysis needle is completed.
The utility model discloses during the specific use: the hemodialysis needle penetrates into a blood vessel, blood returns from a gap of an inner cavity between a transparent needle seat and an exhaust plug, namely the puncture is successful, the needle tube is withdrawn for a certain distance, the needle point is retracted into the tip of a flexible tube, the puncture angle is reduced, the flexible tube is sent into the blood vessel, then the needle tube is continuously withdrawn backwards, when a protruding point on the puncture end of the needle tube is in clamping contact with a needle hole in the middle of a stop card in the needle tip penetration prevention device, the stop card is driven to move backwards, the stop card is not in contact with the end surface of the inner cavity of a rear cover of a connector, the needle point of the puncture needle tube is just separated from an eccentric stop block and a stop block at the moment, the eccentric stop block is poured on the inner cavity of the connector, the needle hole deviates from the needle hole of the connector, the block body blocks the needle hole, the stop block is also poured on the block, the needle hole on the connector is further blocked, and the needle tip cannot penetrate through the needle tip prevention device, so that the accident of the needle tip is prevented. And then the needle base is pulled continuously, the cylindrical convex card on the connecting head of the device for preventing the needle tip from penetrating out is driven by the needle tube to be separated from the elastic convex card on the sealing stopper, and finally the puncture needle tube assembly is separated from the indwelling catheter assembly, as shown in figures 22 and 23, because the indwelling catheter assembly is connected and blocked by the sealing stopper, blood can not flow out of the assembly, and the indwelling catheter assembly is retained in a blood vessel hose to avoid the damage to the blood vessel. If the connector of the dialysis machine is a puncture needle, the puncture needle can be directly inserted through the sealing block, the inner cavity of the indwelling catheter assembly is communicated, if the puncture needle is a needleless connector, the swinging brake pad on the indwelling catheter assembly can be firstly swung until the upper long segment of the swinging brake pad is clamped and connected with the clamping hook on the connecting seat, at the moment, the elastic short pipe is pressed and extruded by the end head of the swinging brake pad, the elastic short pipe is flattened and deformed, the inner wall of the pipe is tightly attached, the inner cavity channel of the catheter assembly is blocked from being communicated with the outside, at the moment, the sealing block can be unscrewed, after the dialysis machine is connected with the catheter assembly, the swinging brake pad is reopened to recover communication, the treatment is finished, the swinging brake pad can be reclosed to block communication, the connector of the dialysis machine is dismantled, the sealing block is unscrewed again, the inner cavity of the catheter assembly is ensured to be sterile and clean, and the indwelling catheter assembly is convenient to reuse, as shown in figures 24 and 25.
The parts not described in the present embodiment are the same as those in the prior art.
Claims (10)
1. The utility model provides a hemodialysis needle with swing brake lining which characterized in that: the indwelling catheter assembly comprises an indwelling catheter assembly and a puncture needle assembly, wherein the indwelling catheter assembly comprises a hose, a catheter seat, an elastic short pipe, a connecting seat, a swinging brake pad and a sealing plug, one end of the hose is provided with a cone, the hose at the end of the cone is provided with a plurality of small holes communicated with the inner wall and the outer wall of the hose, the other end of the hose is connected with one end of the catheter seat, the two ends of the elastic short pipe are respectively connected with the catheter seat and the connecting seat in a sealing way, the elastic short pipe is positioned in an inner cavity of the catheter seat and the connecting seat, the elastic short pipe between the catheter seat and the connecting seat is in a free state so as to facilitate the swinging brake pad to press and deform the elastic short pipe, one end of the connecting seat is connected with the catheter seat, the sealing plug is arranged at the other end of the connecting seat, the swinging brake pad is hinged on the outer surface of the connecting seat, the swinging brake pad can swing back and forth along the axial direction of the connecting seat, the swinging brake pad is divided into a long section and a short section by a hinged point, the short section and an angle are formed between the short section, the short section and the short section of the swinging brake pad, the short section of the connecting seat faces upwards when the swinging brake pad is in a normal state, and an extrusion hole is formed on the corresponding pipe wall of the connecting seat; the puncture needle tube assembly comprises a puncture needle tube and a transparent needle base, and the needle head of the puncture needle tube is exposed out of the tip end of the hose when penetrating into the hose of the indwelling catheter assembly.
2. The hemodialysis needle with an oscillating shutter according to claim 1, wherein: the swing brake pad is provided with a positioning device for positioning the swing brake pad on the connecting seat, the positioning device comprises a convex card or a clamping hook which is positioned on the side of the hinged joint of the connecting seat without an extrusion hole, and the long section of the swing brake pad is provided with a groove or a clamping hole which is matched with the convex card for use.
3. The hemodialysis needle with an oscillating shutter according to claim 2, wherein: the positioning device also comprises a clamping hook arranged at one side of the connecting seat with the extrusion hole, and a clamping hook or a clamping groove matched with the clamping hook on the connecting seat is arranged at one side of the swinging brake sheet with the same direction as the short sheet.
4. The hemodialysis needle with an oscillating shutter according to claim 3, wherein: the connecting seat is connected with the sealing plug, an inner luer connector is arranged in an inner cavity of the connecting seat, and an outer luer connector is configured on the sealing plug.
5. The hemodialysis needle with an oscillating shutter according to claim 4, wherein: one end of the sealing plug is provided with an external luer connector, the other end of the sealing plug is a thin-walled cylinder, a spacer is arranged between the external luer connector and the thin-walled cylinder, a self-closing needle penetrating hole is arranged in the middle of the spacer, and a sealing element is further arranged between the external luer connector and the spacer.
6. The hemodialysis needle with an oscillating shutter according to claim 5, wherein: the thin-wall cylinder end of the sealing device is also provided with a connecting device matched with the puncture needle tube assembly for use, the connecting device at the thin-wall cylinder end is an inverted U-shaped groove, and an axial groove of the inverted U-shaped groove is communicated with the cylinder end to form an opening sliding groove.
7. The hemodialysis needle with an oscillating shutter according to any one of claims 1 to 5, wherein: the puncture needle tube assembly further comprises a puncture needle tube penetration preventing device, the puncture needle tube penetration preventing device comprises a connector, a connector rear cover, an eccentric stop dog, a stop catch and a stop card, one end of the connector can be embedded into a sealed and blocked thin-walled cylinder inner cavity of the indwelling needle tube assembly when the puncture needle tube assembly is used, the connector is a tubular body with one closed end and one open end, a needle hole is formed in the closed end, one end of the connector rear cover is embedded into an inner cavity of an open end of the connector, the eccentric stop dog and the stop catch are arranged in the inner cavity of the connector, the eccentric stop dog and the stop catch are close to the closed end of the inner cavity of the connector, the stop catch is positioned at the end of the connector rear cover, the stop catch is arranged at the closed end of the inner cavity of the connector rear cover, the connector rear cover is a tubular body with one closed end, the closed end of the connector rear cover is provided with a needle hole, the eccentric stop dog, the stop dog and the stop catch are arranged on the stop dog and the stop card, a part of the connector rear cover is embedded into the inner cavity of a transparent needle seat, a luer connector is arranged at the other end of the transparent needle seat, a puncture needle seat is fixedly connected with a puncture needle tube, and a middle section of the puncture needle seat, and an exhaust end of the needle seat is arranged in the middle section of the needle tube fixedly connected with a transparent needle seat.
8. The hemodialysis needle with an oscillating shutter according to claim 7, wherein: the end part of the connector matched with the sealing plug is provided with a connecting device connected with the sealing plug, and the connecting device on the connector is a convex card which can be clamped into a U-shaped groove of the sealing plug.
9. The hemodialysis needle with an oscillating shutter according to claim 8, wherein: the connector is also provided with a clamping hole matched with the connector rear cover, and the connector rear cover is provided with a corresponding clamping convex card.
10. The hemodialysis needle with an oscillating shutter according to claim 9, wherein: the periphery of the connector is also provided with a shoulder for assembling and positioning the transparent needle base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221162605.7U CN218420537U (en) | 2022-05-16 | 2022-05-16 | Hemodialysis needle with swing brake pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221162605.7U CN218420537U (en) | 2022-05-16 | 2022-05-16 | Hemodialysis needle with swing brake pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218420537U true CN218420537U (en) | 2023-02-03 |
Family
ID=85079453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221162605.7U Active CN218420537U (en) | 2022-05-16 | 2022-05-16 | Hemodialysis needle with swing brake pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218420537U (en) |
-
2022
- 2022-05-16 CN CN202221162605.7U patent/CN218420537U/en active Active
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