CN211486160U - Balloon dilator for arteriovenous internal fistula - Google Patents

Abstract

The utility model discloses a balloon dilator for internal arteriovenous fistula, including hollow pjncture needle and sacculus expansion pipe, sacculus expansion pipe includes the pipe, connects in the terminal expansion sacculus of pipe and connects in the pressure generator of pipe head end, the expansion sacculus end of sacculus expansion pipe penetrates and wears out from the needle point from the pjncture needle afterbody. The utility model discloses a sacculus expander for internal arteriovenous fistula, can adapt to the pipe diameter size and can easily send into to tiny vein, it is little to endovenous or venous valve damage to send into the process, the vein expansion degree is controllable, it can select pointed end sacculus water injection two according to vein internal diameter size to expand the vein in-process, also can follow the small dose and begin to increase gradually until satisfied, can also play certain bolt effect of getting after the front end sacculus expansion, and length reaches the constrictive basic demand of upper arm heart end, pressure reaches narrow case processing requirement, and low cost, alleviate dialysis patient's economic burden.

Description

Balloon dilator for arteriovenous internal fistula

Technical Field

The utility model relates to a medical science expansion apparatus technical field, concretely relates to sacculus expander for internal arteriovenous fistula art.

Background

At present, one of the main schemes for clinically treating chronic renal failure in hemodialysis is one of the most commonly used vascular accesses in hemodialysis, namely, an autologous arteriovenous fistula is established, namely, a superficial vein and a superficial artery at the periphery of a patient are anastomosed by a shell surgery method, so that the venous blood vessel is arteriolized, is convenient to puncture and meets the blood flow required during blood purification, and therefore, the well-functioning vascular access has important significance for maintaining the stability of the internal environment of a human body and maintaining the stability of vital signs of the patient.

Autologous arteriovenous fistula (AVF) has been introduced into the field of hemodialysis as a vascular access for over 50 years, has the advantages of longer service life, low infection rate, relatively few complications and the like compared with other vascular accesses, and becomes a preferred vascular access for maintenance hemodialysis of uremia patients. Clinical observations indicate that the usual rate of AVF is related to factors such as age, internal forearm fistula, gender, body mass index, diabetes, hypotension, vascular intrinsic properties, etc. Even with careful preoperative evaluation screening and skilled surgical procedures, the early phase loss of AVF is as high as 20% to 50%, indicating that AVF is not mature or does not provide sufficient effective blood flow to complete hemodialysis. The great reason for AVF loss is that the patients have poor vascular conditions, which leads to difficulty in fistulization or poor maturation, or that the veins are intimal hyperplasia or punctured repeatedly, which leads to stenosis or thrombosis. Generally, the diameter of the vein lumen needs to be more than or equal to 2.5mm to meet the blood flow requirement during dialysis, and the methods generally adopted at present for meeting the lumen requirement of the blood vessel include: a. the scalp needle hose is adopted for water injection and hydraulic expansion, the method can be applied to most AVF operations, but the placement is difficult in the case of fine vein diameter, and the vein wall is possibly damaged due to unsmooth tip; b. the PTA dilator is adopted for venous blood vessel dilation, but the PTA dilator is expensive, and most patients cannot bear the high cost due to the overhigh dialysis frequency; c. adopt 6F catheter to expand vein, the low price, the pipe diameter is suitable and can easily send into to tiny vein, it is little to endangium or venous valve damage to send into the process, the venous dilatation degree is controllable, can select sharp-end sacculus water injection two according to vein internal diameter size among the expansion vein process, also can begin to increase gradually until satisfying from the small-dose, can also play certain thrombectomy effect after the expansion of front end sacculus, but also have some limitations when using: the catheter has a limited length, and is ineffective for upper arm stenosis (beyond its effective length) at the cardiac end, and in the case of stenosis, the balloon length and pressure are limited, so that it is impossible to treat stenosis as in the PTA dilator.

Therefore, in order to solve the problems, a balloon dilator for arteriovenous internal fistula is needed, the balloon dilator can adapt to the diameter of a pipe and can be easily fed into a tiny vein, the damage to the endovenous or venous valve in the feeding process is small, the vein expansion degree is controllable, two water injections can be selected for the tip balloon according to the inner diameter of the vein in the vein expanding process, the water injections can be gradually increased from a small dose to a satisfactory state, a certain thrombus taking effect can be achieved after the front end balloon is expanded, the length meets the basic requirement of the upper arm on the stenosis at the heart inlet end, the pressure meets the requirement of the stenosis case treatment, the cost is low, and the economic burden of a dialysis patient is relieved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the defect among the prior art, provide the sacculus expander for arteriovenous internal fistula, can adapt to the pipe diameter size and can easily send into to tiny vein, it is little to the endangium or the damage of venous valve to send into the process, the vein expansion degree is controllable, it is two to select sharp-end sacculus water injection according to vein internal diameter size in the expansion vein process, also can begin to increase gradually until satisfying from the small-dose, can also play certain effect of getting tied of getting after the front end sacculus expansion, and length reaches the constrictive basic demand of upper arm inlet end, pressure reaches narrow case processing requirement, and low cost, alleviate dialysis patient's economic burden.

The utility model discloses a sacculus expander for internal arteriovenous fistula, including hollow pjncture needle and sacculus expansion pipe, sacculus expansion pipe includes the pipe, connects in the terminal expansion sacculus of pipe and connects in the pressure generator of pipe head end, the expansion sacculus end of sacculus expansion pipe penetrates and wears out from the needle point from the pjncture needle afterbody.

Further, the expansion balloon is a tubular balloon, and the tail end of the expansion balloon is provided with a thrombus removal section.

Further, the thrombus removal section is a blind tube with the diameter similar to that of the catheter and is about 2 mm.

Furthermore, the expansion balloon comprises a breakthrough section, an expansion section and a buffer section which are sequentially connected, wherein the breakthrough section is connected with the thrombus removal section, and the buffer section is connected with the catheter.

Furthermore, the diameter of the expansion section can be adjusted, the adjustment range is 3-5 mm, and the breakthrough section and the buffer section are respectively connected with the thrombus removal section and the catheter in a sealing manner in a manner of being capable of adapting to the diameter change of the expansion section.

Further, the length of the conduit is not less than 1m, and scales are arranged on the conduit.

Further, a liquid injection branch pipe is connected to the position, close to the pressure generator, of the conduit.

Furthermore, a wing head for fixing is arranged on the puncture needle close to the tail end.

The utility model has the advantages that: the utility model discloses a sacculus expander for internal arteriovenous fistula, can adapt to the pipe diameter size and can easily send into to tiny vein, it is little to endovenous or venous valve damage to send into the process, the vein expansion degree is controllable, it can select pointed end sacculus water injection two according to vein internal diameter size to expand the vein in-process, also can follow the small dose and begin to increase gradually until satisfied, can also play certain bolt effect of getting after the front end sacculus expansion, and length reaches the constrictive basic demand of upper arm heart end, pressure reaches narrow case processing requirement, and low cost, alleviate dialysis patient's economic burden.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the dilatation balloon of the present invention.

Detailed Description

FIG. 1 is a schematic structural view of the present invention, FIG. 2 is a schematic structural view of an expanding balloon of the present invention, as shown in the figure, the balloon dilator for arteriovenous internal fistula in the embodiment comprises a hollow puncture needle 11 and a balloon dilatation catheter, the balloon dilatation catheter comprises a catheter 2, an dilatation balloon 3 connected with the tail end of the catheter 2 and a pressure generator 4 connected with the head end of the catheter 2, wherein the head end is at the end of the catheter 2 connected with the pressure generator 4, the tail end is at the end connected with the dilatation balloon 3, the dilatation balloon 3 end of the balloon dilatation catheter penetrates into the tail part of a puncture needle 11 and penetrates out from the needle point, after the puncture needle 1 punctures the skin and enters the superficial vein vessel, the catheter 2 and the expansion balloon 2 are sent into the superficial vein vessel, and the diameter of the expansion balloon 3 is controlled by the control pressure generator 4 to expand the narrow section in the vein vessel so as to meet the requirement of the internal fistula vessel diameter.

In this embodiment, the dilation balloon 3 is a tubular balloon, and the end of the dilation balloon is provided with a thrombus removal section 31, when the thrombus removal section 31 contacts with the thrombus, the thrombus can be strung together to be attached to the dilation balloon 3, and the thrombus is pulled out of the blood vessel along with the dilation balloon 3 after the dilation balloon 3 is depressurized, so that the blood vessel is unblocked, and the blood flow is sufficient.

In this embodiment, the thrombus removal section 31 is a blind tube with a diameter similar to that of the catheter 2, and is about 2mm, so that the diameter is very suitable for the catheter 2 to smoothly enter and exit the blood vessel without damaging the intima of the blood vessel.

In this embodiment, the dilation balloon 3 includes a breakthrough section 32, a dilation section 33 and a buffer section 34 which are connected in sequence, the breakthrough section 32 is connected with the thrombus removal section 31, the buffer section 34 is connected with the catheter 2, the breakthrough section 32 is located in front of the dilation balloon 3, and plays a breakthrough role in dilating the stenosis, the dilation section 33 is used for holding and expanding the stenosis, the buffer section 34 is used as a pressure transmission channel of the dilation balloon 3, and can adapt to the diameter change of the dilation section 33 and be connected between the dilation section 33 and the catheter 2 in a sealing manner.

In the embodiment, the diameter of the expansion section 33 is adjustable, the adjustment range is 3 mm-5 mm, and the breakthrough section 32 and the buffer section 34 are respectively connected to the embolectomy section 31 and the catheter 2 in a sealing manner capable of adapting to the diameter change of the expansion section 33.

In the embodiment, the length of the catheter 2 is not less than 1m, and scales are arranged on the catheter, so that the length of the catheter can meet the distance from the fistulization part to the proximal end, the limitation that the proximal end is narrow and cannot reach the expansion due to insufficient length is avoided, and the smooth loop of the blood vessel of the patient is ensured.

In this embodiment, the catheter 2 is connected to a liquid injection branch tube 21 near the pressure generator 4, and the liquid injection branch tube 21 is used for adding liquid to the inflatable balloon 3 through the catheter 2 to adjust the pressure in the inflatable balloon 3.

In this embodiment, a wing head 11 for fixing is disposed on the puncture needle 11 near the tail end, the wing head 11 can be attached to the skin of the puncture site, and is fixed near the puncture site of the patient by a medical adhesive tape, so as to keep the puncture needle 1 relatively fixed and avoid puncturing the blood vessel.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (8)

1. The utility model provides a sacculus expander for arteriovenous internal fistula, its characterized in that: the balloon dilatation catheter comprises a hollow puncture needle and a balloon dilatation catheter, wherein the balloon dilatation catheter comprises a catheter, an dilatation balloon connected to the tail end of the catheter and a pressure generator connected to the head end of the catheter, and the dilatation balloon end of the balloon dilatation catheter penetrates into the tail part of the puncture needle and penetrates out of the needle tip.

2. The balloon dilator for arteriovenous internal fistula of claim 1, characterized in that: the expansion balloon is a tubular balloon, and the tail end of the expansion balloon is provided with a thrombus removal section.

3. The balloon dilator for arteriovenous internal fistula of claim 2, characterized in that: the thrombus removal section is a blind pipe with the diameter similar to that of the catheter and is 2 mm.

4. The balloon dilator for arteriovenous internal fistula of claim 2, characterized in that: the expansion balloon comprises a breakthrough section, an expansion section and a buffer section which are sequentially connected, wherein the breakthrough section is connected with the thrombus removal section, and the buffer section is connected with the catheter.

5. The balloon dilator for arteriovenous internal fistula of claim 4, wherein: the diameter of the expansion section is adjustable, the adjustment range is 3-5 mm, and the breakthrough section and the buffer section are respectively connected with the thrombus removal section and the catheter in a sealing manner in a manner of being capable of adapting to the diameter change of the expansion section.

6. The balloon dilator for arteriovenous internal fistula of claim 1, characterized in that: the length of the conduit is not less than 1m, and scales are arranged on the conduit.

7. The balloon dilator for arteriovenous internal fistula of claim 1, characterized in that: the catheter is connected with a liquid injection branch pipe close to the pressure generator.

8. The balloon dilator for arteriovenous internal fistula of claim 1, characterized in that: and a wing head for fixing is arranged on the puncture needle close to the tail end.

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