CN219001635U

CN219001635U - Arterial catheter assembly

Info

Publication number: CN219001635U
Application number: CN202222598343.5U
Authority: CN
Inventors: 冯引凤
Original assignee: Nanchang No9 Hospital
Current assignee: Nanchang No9 Hospital
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-05-12
Anticipated expiration: 2032-09-29

Abstract

The utility model provides an arterial catheter assembly, wherein a main pipe body outlet is communicated with a catheter, a main pipe body inlet is communicated with an adjusting pipe inlet, a limiting ring, a moving block and a stop ring are sequentially embedded into the inner wall of the adjusting pipe, one surface of the moving block is provided with a conical table, the other surface of the moving block is provided with a corresponding conical groove, a plurality of liquid guide holes penetrating through the moving block are arranged around the conical table, a central array is formed by the plurality of liquid guide holes taking the conical table as the center, when a liquid medicine is pumped by the moving block in the adjusting pipe, the liquid medicine is guided to peripheral liquid guide holes through the inclined surface of the conical table and smoothly conveyed to the arterial catheter, when the arterial cannula breaks away from an original position due to large-scale actions of a patient, the local pressure is increased due to the accumulation of part of blood in the conical groove, so that the moving block is pushed to the stop ring and the liquid guide holes are sealed, and timely response hemostasis measures are provided for arterial bleeding caused by the pipe removal in a tape operation.

Description

Arterial catheter assembly

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an arterial catheter assembly.

Background

The hepatic artery chemoembolization (Tace) is a common minimally invasive therapy for treating liver cancer, and by placing a special catheter into a tumor blood supply target artery, injecting an appropriate amount of embolization agent to occlude the target artery and make the tumor tissue ischemic necrosis, the method can be combined with hepatic artery perfusion chemoembolization (Haic), and embolization can be performed by combining anticancer drugs with microparticles and microspheres, thereby playing a role in chemoembolization, effectively improving local drug concentration, reducing systemic reaction, improving treatment effect, and being a relatively effective method for treating primary liver cancer at present, and being widely applied worldwide.

At present, in the treatment process of the Tace operation, because the catheter cannula needs to be kept in an insertion state at the position of the tumor blood supply artery at any time, when the movement amplitude of normal movement or sleep unconscious movement of a patient is overlarge, the catheter cannula is easy to deviate from the original insertion position, so that the cannula and an embolism part generate gaps to be filled with a large amount of arterial blood, arterial hemorrhage is caused and overflows from an external port of the catheter, meanwhile, an external device (such as an infusion pump) of the catheter is polluted, normal operation progress is blocked, and if continuous hemorrhage cannot be prevented in time, the life safety of the patient is endangered, so that a new technical scheme is needed to solve.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an arterial catheter assembly which is used for providing a timely response hemostasis measure for accidents of arterial hemorrhage caused by tube removal in a race operation, ensuring the life safety of patients and ensuring normal implementation of an external device and an operation process.

The utility model is implemented by the following technical scheme: an arterial catheter assembly comprising a main catheter body, wherein the main catheter body outlet is in communication with a catheter, the main catheter body inlet is in communication with a regulator tube inlet, and the regulator tube outlet is in communication with an external device via a conduit; the inner wall of the adjusting pipe is sequentially embedded with a limiting ring, a moving block and a stop ring, the limiting ring is arranged between the outlet of the adjusting pipe and the stop ring, and the moving block is arranged between the limiting ring and the stop ring; the movable block is provided with a conical table towards one face of the stop ring, the other face of the movable block is provided with a corresponding conical groove, a plurality of liquid guide holes penetrating through the movable block are formed around the conical table, the liquid guide holes form a central array with the conical table as the center, and the following dimensional relationships exist:

the inner diameter of the limiting ring is larger than or equal to the diameter of the central array circumscribed circle, the diameter of the central array inscribed circle, and the inner diameter of the limiting ring is larger than or equal to the diameter of the conical table bottom.

Further, a section of shrinkage tube body with the inner diameter smaller than that of the main tube body is arranged in the main tube body, the shrinkage tube body is positioned between the limiting ring and the stop ring and is attached to the stop ring, the outer diameter of the moving block is in clearance fit with the inner diameter of the main tube body, and the outer diameter of the moving block is in transition fit with the inner diameter of the shrinkage tube body.

Further, a flow switch for controlling the flow in the pipe is arranged on the main pipe body.

Further, the external device is an infusion pump.

The beneficial effects of the utility model are as follows: the component realizes mechanical flow response action through the function of the regulating pipe arranged on one side of the main pipe body, and the pure mechanical response mode has the excellent characteristics of low cost, easy implementation, low error rate, safety and reliability; when the liquid medicine is pumped, the liquid medicine is guided to the peripheral liquid guide holes through the inclined planes of the conical tables and is smoothly conveyed to the arterial catheter, and when the arterial cannula breaks away from the original position due to the large-amplitude action of a patient, the local pressure of the blood poured into the cannula and the catheter is increased after the blood enters the regulating tube due to the storage of part of the blood by the conical grooves, so that the moving block is pushed to the stop ring and the liquid guide holes are sealed, thereby providing timely response hemostasis measures for accidents of arterial hemorrhage caused by the removal of the catheter in the Tace operation, ensuring the life safety of the patient, and guaranteeing the normal implementation of an external device and an operation process.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic illustration of an infusion operation in accordance with one embodiment of the present utility model;

FIG. 3 is a schematic illustration of a hemostatic operation according to an embodiment of the present utility model;

in the figure: 1-main pipe body, 1 a-conduit, 2-adjusting pipe, 2 a-limiting ring, 2 b-moving block, 2 c-blocking ring, 2 d-conical table, 2 e-conical groove, 2 f-liquid guiding hole and 2 g-shrinkage pipe body.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples of the specification.

As shown in fig. 1, an arterial catheter assembly, wherein an outlet of a main catheter body 1 is communicated with a catheter 1a, a flow switch for controlling flow in a catheter is arranged on the main catheter body 1, an inlet of the main catheter body 1 is communicated with an inlet of a regulating catheter 2, and an outlet of the regulating catheter 2 is communicated with an external device through a pipeline, wherein in the embodiment, the external device is an infusion pump; the inner wall of the adjusting pipe 2 is sequentially embedded with a limiting ring 2a, a moving block 2b and a stop ring 2c, wherein the limiting ring 2a is arranged between the outlet of the adjusting pipe 2 and the stop ring 2c, the moving block 2b is arranged between the limiting ring 2a and the stop ring 2c, and the stop ring 2c is relatively close to the inlet of the adjusting pipe 2; one surface of the moving block 2b facing the right side (the direction is shown in fig. 1) is provided with a conical table 2d, the other surface is provided with a corresponding conical groove 2e, a plurality of liquid guide holes 2f penetrating through the moving block 2b are arranged around the conical table 2d, the plurality of liquid guide holes 2f form a central array by taking the conical table 2d as the center, and the following dimensional relationships exist:

the inner diameter of the limiting ring 2a is more than or equal to the diameter of the central array circumscribed circle, the diameter of the central array inscribed circle is more than or equal to the diameter of the intercepting ring 2c, and the inner diameter of the conical table 2d bottom diameter.

According to the embodiment, the mechanical flow response action is realized through the function of the regulating pipe 2 arranged on one side of the main pipe body 1, and the pure mechanical response mode has the excellent characteristics of low cost, easiness in implementation, low error rate, safety and reliability, and the specific working principle is as follows:

as shown in fig. 2, the cannula connected with the catheter 1a is placed into the hepatic artery of a patient to perform a Tace operation, the liquid medicine is pumped into the inlet of the regulating tube 2 through the liquid medicine pump, the liquid medicine is guided to the peripheral array of liquid guide holes 2f because the surface of the conical table 2d has a diffusion effect on the impact of the liquid medicine, and even if the moving block 2b is impacted by the liquid medicine to be attached to the limiting table to complete the limiting, the limiting table cannot cover any part of the array of liquid guide holes 2f, so that the liquid medicine smoothly passes through the moving block 2b and is conveyed to the main tube 1 at the outlet of the regulating tube 2, the flow rate of the liquid medicine is controlled by the regulating valve, and a proper amount of liquid medicine enters the hepatic artery to exert the drug effect;

as shown in fig. 3, when the arterial cannula is separated from the original position due to the large-amplitude action of the patient, arterial blood flowing in from the gap of the cannula orifice flows back into the catheter 1a and the main tube 1, the instantaneous pressure of blood flowing in from the outlet end (as left side in fig. 3) of the regulating tube 2 is larger than that of the liquid medicine at the inlet end (as right side in fig. 3) of the regulating tube 2 at the moment because the pressure of the liquid medicine preset in the embolic state is smaller, the instantaneous impact force on the moving block 2b is caused from left to right, and meanwhile, the conical groove 2e has a collecting effect on part of the blood flowing in instantaneously, so that the instantaneous flow of blood penetrating into the liquid guiding hole 2f is effectively reduced, and the blood flow impact is ensured to have enough strength, the moving block 2b is close to and attached to the cut-off ring 2c under the action of blood flow impact and inertia, and the cut-off ring 2c can completely cover the array of the liquid guiding hole 2f because the inner diameter is smaller, so that the residual overflowing of the liquid guiding hole 2f is blocked, the moving block 2b is further amplified from left to right in the closed state, the left side to the moving block 2b has an effect of collecting effect on the instantaneous impact force on the part of the blood flowing in the instantaneous impact on the arterial blood flowing into the catheter 2f, the relevant position is ensured, the blood flow impact is ensured to reach the normal position of the relevant operation position, and the life-stop device is ensured, and the normal operation position is ensured, and the life-position is ensured to be connected to the normal and the operation position.

In this embodiment, a section of shrinkage tube body 2g with a relatively smaller inner diameter is arranged in the main tube body 1, the shrinkage tube body 2g is located between the limiting ring 2a and the stop ring 2c and is attached to the stop ring 2c, the outer diameter of the moving block 2b forms clearance fit with the inner diameter of the main tube body 1, and the outer diameter of the moving block 2b forms transition fit with the inner diameter of the shrinkage tube body 2 g.

Because the liquid medicine pressure, the blood pressure of a patient and the pressure difference of the liquid medicine pressure and the blood pressure of the patient used in the clinical operation have different, when the difference between the liquid medicine pressure and the blood pressure of a tumor artery is smaller, even if a bleeding event with misplaced cannula occurs, the clearance fit between the movable block 2b and the main pipe body 1 can have a good pressure difference corresponding effect, and at the moment, the initial impact force of the backflow blood on the movable block 2b can enable the backflow blood to normally slide and attach to the stop ring 2 c; meanwhile, the movable block 2b is embedded in the shrinkage tube body 2g under inertial impact, the transition fit of the movable block 2b and the shrinkage tube body 2g can provide a certain degree of fit friction force, and at the moment, even if the difference between the liquid medicine pressure and the arterial blood pressure is small, the stable state of the movable block 2b fit stop ring 2c can be still ensured under the assistance of the interference fit friction force of the shrinkage tube body 2g, so that the hemostatic effect is further ensured. After the medical staff arrives at the operation site, the flow switch of the main pipe body 1 can be manually closed, the regulating pipe 2 is detached to discharge the blood in the main pipe body, and the operation progress is ensured after reinstallation.

The foregoing description of the preferred embodiment of the utility model is not intended to limit the utility model in any way, and it is to be understood that the embodiment may be substituted in other ways and equivalents thereof by persons skilled in the art, and is included within the scope of protection of the utility model as defined by the appended claims.

Claims

1. An arterial catheter assembly comprising a main tube body, characterized in that: the main pipe body outlet is communicated with the guide pipe, the main pipe body inlet is communicated with the regulating pipe inlet, and the outlet of the regulating pipe is communicated with the external device through a pipeline; the inner wall of the adjusting pipe is sequentially embedded with a limiting ring, a moving block and a stop ring, the limiting ring is arranged between the outlet of the adjusting pipe and the stop ring, and the moving block is arranged between the limiting ring and the stop ring; one surface of the moving block, which faces the stop ring, is provided with a conical table, the other surface of the moving block is provided with a corresponding conical groove, a plurality of liquid guide holes penetrating through the moving block are formed around the conical table, and the liquid guide holes form a central array by taking the conical table as the center.

2. The arterial catheter assembly of claim 1, wherein: the center array has the following dimensional relationship:

3. The arterial catheter assembly of claim 1, wherein: the main pipe body is internally provided with a section of shrinkage pipe body with the inner diameter smaller than that of the main pipe body, and the shrinkage pipe body is positioned between the limiting ring and the stop ring and is attached to the stop ring.

4. The arterial catheter assembly of claim 1, wherein: the outer diameter of the moving block is in clearance fit with the inner diameter of the main pipe.

5. The arterial catheter assembly of claim 1, wherein: the main pipe body is internally provided with a section of shrinkage pipe body with the inner diameter smaller than that of the main pipe body, and the outer diameter of the moving block is in transition fit with the inner diameter of the shrinkage pipe body.

6. The arterial catheter assembly of claim 1, wherein: the main pipe body is provided with a flow switch for controlling the flow in the pipe.

7. The arterial catheter assembly of claim 1, wherein: the external device is an infusion pump.