Hemodialysis central venous catheter with wall adhesion prevention assembly

Abstract

The invention discloses a hemodialysis central venous catheter with an anti-adherence assembly, and relates to the technical field of hemodialysis, the hemodialysis central venous catheter comprises a double-cavity central venous catheter body, the outer end of the double-cavity central venous catheter body is connected with a connector, the upper end of the connector is connected with a blood outlet pipe and a blood inlet pipe, and the blood outlet pipe and the blood inlet pipe are connected with an anti-adherence assembly. The blood outlet pipe is connected with the blood inlet end of the hemodialysis instrument, and the blood inlet pipe is connected with the blood outlet end of the hemodialysis instrument. The blood outlet and the blood inlet of the central venous catheter are formed in the front end of the central venous catheter, the situation that the side edge of the blood outlet is prone to being attached to the wall to affect the bleeding amount is avoided, meanwhile, the wall attachment preventing assembly is arranged at the end of the central venous catheter, and a gap is formed between the end of the central venous catheter and the blood vessel wall; and the phenomenon that the central venous catheter adheres to the wall is further prevented, so that bleeding and blood inflow of the central venous catheter are guaranteed, and the dialysis effect of a patient is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hemodialysis, and in particular relates to a central venous catheter for hemodialysis with an anti-adhesion component. Background Art

[0002] In hemodialysis treatment, central venous catheter is an important vascular access device. However, in actual use, traditional central venous catheters often face some problems.

[0003] On the one hand, due to the blood flow characteristics and the patient's body position changes, the central venous catheter may stick to the wall in the blood vessel. Catheter sticking to the wall will lead to poor blood flow and affect the effect of hemodialysis. In severe cases, it may make dialysis unable to proceed normally, prolong the treatment time, increase the patient's pain and treatment costs.

[0004] On the other hand, the catheter adhered to the wall may also cause complications such as thrombosis. The thrombus will not only further obstruct blood flow, but may also fall off and flow with the blood, posing a serious threat to the patient's life safety.

[0005] In order to solve these problems, it is particularly important to develop a central venous catheter for hemodialysis with an anti-adhesion component. Summary of the invention

[0006] The present invention provides a central venous catheter for hemodialysis with an anti-adhesion component, which can effectively prevent the catheter from adhering to the wall, ensure the stability and smoothness of blood flow during hemodialysis, and improve the safety and effectiveness of treatment.

[0007] The present invention is realized by the following technical scheme: a central venous catheter for hemodialysis with an anti-adhesion component, comprising a double-lumen central venous catheter body, the outer end of the double-lumen central venous catheter body is connected to a connector, the upper end of the connector is respectively connected to an outflow blood vessel and an inflow blood vessel, the outflow blood vessel is connected to the blood inlet end of a hemodialysis instrument, and the inflow blood vessel is connected to the bleeding end of the hemodialysis instrument;

[0008] A partition is provided in the inner cavity of the double-lumen central venous catheter body, and the partition divides the inner cavity of the double-lumen central venous catheter body into two channels, namely a bleeding channel and a blood inlet channel, and the ends of the bleeding channel and the blood inlet channel are respectively provided with a bleeding port and a blood inlet; the bleeding port is used to transport the blood in the central vein to the hemodialysis instrument, and the blood inlet is used to transport the blood in the hemodialysis instrument to the central vein, thereby forming a blood circulation;

[0009] The end of the double-lumen central venous catheter body is provided with an anti-wall-adherence component for preventing the inner end of the double-lumen central venous catheter body from adhering to the wall of the blood vessel, thereby affecting the patency of the bleeding outlet.

[0010] Preferably, a core tube is provided in the middle of the partition, a driving mechanism is provided in the middle of the upper end of the connector, and the lower end of the driving mechanism extends into the inner cavity of the core tube and drives the anti-adherence component to expand or contract.

[0011] Preferably, the anti-adherence component comprises a plurality of steel wires, one end of which is inserted into the interior of the core tube and connected to the driving mechanism, and the other end of which is fixedly connected to a rotating block, and a plurality of grooves are equidistantly arranged at the lower port of the double-lumen central venous catheter body, and the rotating block at the end of each steel wire is rotatably connected to the corresponding groove via a rotating shaft, thereby forming a mesh cover at the lower port of the double-lumen central venous catheter body, which can prevent thrombus from entering the bleeding channel of the double-lumen central venous catheter body;

[0012] When it is necessary to prevent the double-lumen central venous catheter body from sticking to the wall, the driving mechanism is used to move one end of the steel wire located on the core tube outward, and the outer end of the steel wire is rotated outward, and the extended part of the steel wire expands toward the periphery of the double-lumen central venous catheter body, so that the outer diameter of the mesh cover is larger than the outer diameter of the double-lumen central venous catheter body, so that it is supported on the inner wall of the central vein, preventing the end of the double-lumen central venous catheter body from sticking to the inner wall of the central vein.

[0013] Preferably, the driving mechanism includes a driving rod, the lower end of which passes through a connecting head and is inserted into the inner cavity of the core tube, and the upper end of the driving rod is provided with a driving ring; the lower end of the driving rod is fixedly connected to a connecting shaft, the lower part of the connecting shaft is rotatably connected to a sealing plug, the sealing plug is sealed with the inner wall of the core tube, and the sealing plug can move along the axial direction of the core tube but cannot rotate; the lower end of the sealing plug is provided with a connecting seat, and the lower end of the connecting seat is connected to the inner end of the steel wire.

[0014] Preferably, a threaded protrusion is provided on the upper part of the outer wall of the driving rod, and a threaded groove is provided on the inner wall of the connecting head. The driving rod and the connecting head are threadedly connected. By rotating the driving ring, the driving rod rotates, so that the driving rod moves relative to the connecting head, thereby driving the sealing plug and the connecting seat to rise or fall, and then driving the steel wire to contract or extend.

[0015] Preferably, a reinforcement ring is provided at the lower end of the core tube, and the reinforcement ring is embedded in the inner wall of the core tube. The reinforcement ring is a metal ring. During the extension and retraction of the steel wire, the steel wire will rub against the lower end of the core tube, which may easily cause damage to the core tube. The provision of the reinforcement ring can avoid direct contact between the steel wire and the core tube, and the friction resistance between the metal reinforcement ring and the steel wire is small, which facilitates the extension or retraction of the steel wire.

[0016] Preferably, flat connecting ears are symmetrically provided on both sides of the connecting support, and through holes are provided on the connecting ears. When the central venous catheter is fixed, the connecting ears are in contact with the patient's skin, and the connecting head is fixed to the patient by passing tape or rope through the through holes of the connecting ears. The fixation is more firm, and the contact area between the connecting ears and the skin is large, thereby increasing the comfort of the patient.

[0017] Preferably, the outer sides of the blood outlet and blood inlet are provided with hemostatic clips for controlling the flow and switching of the blood outlet and blood inlet.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention arranges the bleeding port and the blood inlet of the central venous catheter at the front end of the central venous catheter to prevent the bleeding port from sticking to the wall on the side and affecting the amount of bleeding. At the same time, an anti-sticking component is arranged at the end of the central venous catheter to form a gap between the end of the central venous catheter and the blood vessel wall, further preventing the occurrence of the central venous catheter sticking to the wall, thereby ensuring the bleeding and blood inlet of the central venous catheter and improving the dialysis effect of the patient.

[0020] 2. The present invention sets a plurality of retractable steel wires at the end of the central venous catheter to form a mesh cover, which can not only prevent thrombus from entering the bleeding channel of the double-lumen central venous catheter, but also effectively prevent the end of the double-lumen central venous catheter from sticking to the wall by extending the expanded steel wire mesh. At the same time, the expanded steel wire mesh can break the fibrin sheath wrapped around the end of the central venous catheter to ensure smooth blood flow.

[0021] 3. The present invention rotates the driving ring to rotate the driving rod, so that the driving rod moves relative to the connecting head, thereby driving the sealing plug and the connecting seat to rise or fall, and then driving the steel wire to retract or extend, making the control operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the structure of a central venous catheter for hemodialysis with an anti-adhesion component;

[0023] Figure 2 The schematic diagram is a structural diagram of a central venous catheter for hemodialysis with an anti-adhesion component during contraction;

[0024] Figure 3 The present invention is a lower oblique view of a central venous catheter for hemodialysis with an anti-adhesion component;

[0025] Figure 4 for Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0026] Figure 5The schematic diagram is a structural diagram of a double-lumen central venous catheter body in a central venous catheter for hemodialysis with an anti-adhesion component;

[0027] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of B;

[0028] Figure 7 A cross-sectional view of a double-lumen central venous catheter body in a central venous catheter for hemodialysis with an anti-adhesion component;

[0029] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of C in the middle;

[0030] Fig. 9 This is a partially enlarged view of a central venous catheter for hemodialysis with an anti-adhesion component.

[0031] Numbers in the figure: 1. double-lumen central venous catheter body; 2. connector; 3. outlet blood vessel; 4. inlet blood vessel; 5. hemostatic clip; 6. drive mechanism; 7. connecting ear; 8. anti-adhesion component; 9. partition; 10. core tube; 11. groove; 12. reinforcement ring;

[0032] 61. driving rod; 62. driving ring; 63. connecting shaft; 64. sealing plug; 65. connecting seat; 81. rotating block; 82. rotating shaft; 83. steel wire. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] See also Figure 1-Figure 9 A central venous catheter for hemodialysis with an anti-adhesion component comprises a double-lumen central venous catheter body 1, the outer end of the double-lumen central venous catheter body 1 is connected to a connector 2, the upper end of the connector 2 is respectively connected to an outflow blood vessel 3 and an inflow blood vessel 4, the outflow blood vessel 3 is connected to the blood inlet end of the hemodialysis instrument, and the inflow blood vessel 4 is connected to the bleeding end of the hemodialysis instrument;

[0036] A partition 9 is provided in the inner cavity of the double-lumen central venous catheter body 1, and the partition 9 divides the inner cavity of the double-lumen central venous catheter body 1 into two channels, namely a bleeding channel and a blood inlet channel, and the ends of the bleeding channel and the blood inlet channel are respectively provided with a bleeding port and a blood inlet; the bleeding port is used to transport the blood in the central vein to the hemodialysis instrument, and the blood inlet is used to transport the blood in the hemodialysis instrument to the central vein, thereby forming a blood circulation;

[0037] An anti-sticking component 8 is provided at the end of the double-lumen central venous catheter body 1 to prevent the inner end of the double-lumen central venous catheter body 1 from sticking to the wall of the blood vessel, thereby affecting the patency of the bleeding site.

[0038] A core tube 10 is disposed in the middle of the partition 9, a driving mechanism 6 is disposed in the middle of the upper end of the connector 2, and the lower end of the driving mechanism 6 extends into the inner cavity of the core tube 10 to drive the anti-adherence component 8 to expand or contract.

[0039] Flat connecting ears 7 are symmetrically provided on both sides of the connecting support, and a through hole is provided on the connecting ear 7. When the central venous catheter is fixed, the connecting ear 7 is in contact with the patient's skin, and the connector 2 is fixed to the patient by passing adhesive tape or rope through the through hole of the connecting ear 7. The fixation is more firm, and the contact area between the connecting ear 7 and the skin is large, thereby increasing the comfort of the patient.

[0040] The outer sides of the blood outlet 3 and the blood inlet 4 are both provided with hemostatic clips 5 for controlling the flow rate and switch of the blood outlet 3 and the blood inlet 4 .

[0041] In this embodiment, the bleeding port and the blood inlet of the central venous catheter are arranged at the front end of the central venous catheter to prevent the bleeding port from sticking to the wall on the side and affecting the bleeding volume. At the same time, an anti-sticking component 8 is arranged at the end of the central venous catheter to create a gap between the end of the central venous catheter and the blood vessel wall, further preventing the central venous catheter from sticking to the wall, thereby ensuring the bleeding and blood inlet of the central venous catheter and improving the dialysis effect of the patient.

[0042] Embodiment 2

[0043] In order to prevent the end of the double-lumen central venous catheter body from being close to the wall of the blood vessel and to prevent thrombus from entering the bleeding channel and affecting the bleeding flow, the present application adds the following technical solutions on the basis of the first embodiment:

[0044] See also Figure 4 , Figure 5 , Figure 8The anti-adherence component 8 includes a plurality of steel wires 83, one end of which is inserted into the core tube 10 and connected to the driving mechanism 6, and the other end of the steel wire 83 is fixedly connected to a rotating block 81. The lower port of the double-lumen central venous catheter body 1 is provided with a plurality of grooves 11 at equal distances, and the rotating block 81 at the end of each steel wire 83 is rotatably connected to the corresponding groove 11 through a rotating shaft 82, thereby forming a mesh cover at the lower port of the double-lumen central venous catheter body 1, which can prevent thrombus from entering the bleeding channel of the double-lumen central venous catheter body 1;

[0045] The number of the steel wires 83 is between 12 and 18, and 14 are preferred in this embodiment, so as to form a mesh cover with a suitable aperture, which does not affect the circulation of blood and can also prevent blood clots from passing through.

[0046] When it is necessary to prevent the double-lumen central venous catheter body 1 from sticking to the wall, the driving mechanism 6 is used to move the steel wire 83 at one end of the core tube 10 outward, and the outer end of the steel wire 83 rotates outward, and the extended part of the steel wire 83 expands toward the periphery of the double-lumen central venous catheter body 1, so that the outer diameter of the mesh cover is larger than the outer diameter of the double-lumen central venous catheter body 1, so that it is supported on the inner wall of the central vein, preventing the end of the double-lumen central venous catheter body 1 from sticking to the inner wall of the central vein.

[0047] At the same time, after the central venous catheter is placed and used for a long time, a fibrin sheath will form between the tip and the side wall of the catheter, that is, between the blood outlet and the blood inlet. The fibrin sheath wraps around the blood inlet of the side wall of the catheter like a sock, resulting in the inability to smoothly draw out blood and poor blood flow. In order to prevent and treat the formation of this fibrin sheath, the existing technology is to repeatedly use urokinase to dissolve thrombolysis after the protein sheath is formed. However, urokinase thrombolysis cannot dissolve the fibrin sheath, but can only dissolve some microthrombi in the fibrin sheath, thereby releasing a small amount of space for blood circulation.

[0048] In this embodiment, the fibrin sheath wrapped around the end of the central venous catheter can be broken by the expanded steel wire 83 mesh, thereby ensuring smooth blood flow.

[0049] Embodiment 3

[0050] In order to facilitate driving all the steel wires to expand or contract at the same time, this embodiment adds the following scheme on the basis of the second embodiment:

[0051] See also Figure 7-Figure 9The driving mechanism 6 includes a driving rod 61, the lower end of which passes through the connector 2 and is inserted into the inner cavity of the core tube 10, and the upper end of the driving rod 61 is provided with a driving ring 62; the lower end of the driving rod 61 is fixedly connected with a connecting shaft 63, and the lower part of the connecting shaft 63 is rotatably connected with a sealing plug 64, the sealing plug 64 is sealed with the inner wall of the core tube 10, and the sealing plug 64 can move along the axial direction of the core tube 10, but cannot rotate; the lower end of the sealing plug 64 is provided with a connecting seat 65, and the lower end of the connecting seat 65 is connected to the inner end of the steel wire 83.

[0052] A threaded protrusion is provided on the upper part of the outer wall of the driving rod 61, and a threaded groove is provided on the inner wall of the connecting head 2. The driving rod 61 and the connecting head 2 are threadedly connected. By rotating the driving ring 62, the driving rod 61 rotates, and the driving rod 61 moves relative to the connecting head 2, thereby driving the sealing plug 64 and the connecting seat 65 to rise or fall, and then driving the steel wire 83 to retract or extend, which is easy to operate.

[0053] The lower end of the core tube 10 is provided with a reinforcement ring 12, which is embedded in the inner wall of the core tube 10, and the reinforcement ring 12 is a metal ring. During the extension and retraction of the steel wire 83, the steel wire 83 will rub against the lower end of the core tube 10, which may easily cause damage to the core tube 10. The setting of the reinforcement ring 12 can avoid direct contact between the steel wire 83 and the core tube 10, and the friction resistance between the metal reinforcement ring 12 and the steel wire 83 is small, which facilitates the extension or retraction of the steel wire 83.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A central venous catheter for hemodialysis with an anti-adhesion component, comprising a double-lumen central venous catheter body (1), the outer end of the double-lumen central venous catheter body (1) is connected to a connector (2), the upper end of the connector (2) is respectively connected to an outflow blood vessel (3) and an inflow blood vessel (4), the outflow blood vessel (3) is connected to the blood inlet end of a hemodialysis instrument, and the inflow blood vessel (4) is connected to the bleeding end of the hemodialysis instrument, characterized in that: A partition (9) is provided in the inner cavity of the double-lumen central venous catheter body (1), and the partition (9) divides the inner cavity of the double-lumen central venous catheter body (1) into two channels, namely a bleeding channel and a blood inlet channel, and the ends of the bleeding channel and the blood inlet channel are respectively provided with a bleeding port and a blood inlet; the bleeding port is used to transport blood in the central vein to a hemodialysis instrument, and the blood inlet is used to transport blood in the hemodialysis instrument to the central vein, thereby forming a blood circulation; The end of the double-lumen central venous catheter body (1) is provided with an anti-wall-adherence component (8) for preventing the inner end of the double-lumen central venous catheter body (1) from adhering to the wall of a blood vessel.

2. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 1, characterized in that: A core tube (10) is provided in the middle of the partition (9), a driving mechanism (6) is provided in the middle of the upper end of the connector (2), the lower end of the driving mechanism (6) extends into the inner cavity of the core tube (10) and drives the anti-adherence component (8) to expand or contract.

3. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 2, characterized in that: The anti-adherence component (8) comprises a plurality of steel wires (83), one end of which is inserted into the interior of the core tube (10) and connected to the driving mechanism (6), and the other end of which is fixedly connected to a rotating block (81). The lower port of the double-lumen central venous catheter body (1) is provided with a plurality of grooves (11) at equal intervals, and the rotating block (81) at the end of each steel wire (83) is rotatably connected to the corresponding groove (11) via a rotating shaft (82), thereby forming a mesh cover at the lower port of the double-lumen central venous catheter body (1), thereby preventing thrombus from entering the bleeding channel of the double-lumen central venous catheter body (1).

4. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 3, characterized in that: The driving mechanism (6) comprises a driving rod (61), the lower end of which passes through the connector (2) and is inserted into the inner cavity of the core tube (10), and the upper end of the driving rod (61) is provided with a driving ring (62); the lower end of the driving rod (61) is fixedly connected to a connecting shaft (63), the lower part of the connecting shaft (63) is rotatably connected to a sealing plug (64), the sealing plug (64) is sealed with the inner wall of the core tube (10), and the sealing plug (64) can move along the axial direction of the core tube (10) but cannot rotate; the lower end of the sealing plug (64) is provided with a connecting seat (65), and the lower end of the connecting seat (65) is connected to the inner end of the steel wire (83).

5. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 4, characterized in that: The upper part of the outer wall of the driving rod (61) is provided with a threaded protrusion, the inner wall of the connecting head (2) is provided with a threaded groove, and the driving rod (61) and the connecting head (2) are threadedly connected.

6. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 5, characterized in that: A reinforcing ring (12) is provided through the lower end of the core tube (10); the reinforcing ring (12) is embedded on the inner wall of the core tube (10), and the reinforcing ring (12) is a metal ring.

7. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 1, characterized in that: Flat connecting ears (7) are symmetrically arranged on both sides of the connecting bracket, and through holes are arranged on the connecting ears (7). When the central venous catheter is fixed, the connecting ears (7) are in contact with the patient's skin, and the connecting head (2) is fixed to the patient by passing adhesive tape or a rope through the through holes of the connecting ears (7).

8. A central venous catheter for hemodialysis with an anti-adhesion component according to claim 1, characterized in that: The outer sides of the blood outlet (3) and the blood inlet (4) are both provided with hemostatic clamps (5) for controlling the flow rate and switching of the blood outlet (3) and the blood inlet (4).

Images