CN210096662U

CN210096662U - Medical vascular dilator of injury prevention

Info

Publication number: CN210096662U
Application number: CN201820301247.0U
Authority: CN
Inventors: 张文静; 孙吉平; 张亚莉; 吕佳; 李燕
Original assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Current assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Priority date: 2018-03-05
Filing date: 2018-03-05
Publication date: 2020-02-21
Anticipated expiration: 2028-03-05

Abstract

The utility model relates to a medical vascular expander of damage prevention, including flexible pipe, setting at the syringe connector of flexible pipe entry end and setting up the pyramis at the flexible pipe exit end, syringe connector, flexible pipe and pyramis communicate in proper order, and the pyramis is the cavity taper pipe, the diameter in pyramis from the pyramis free end to with flexible pipe junction grow gradually, be provided with a plurality of water conservancy diversion holes on the lateral wall in pyramis. The utility model provides a current vasodilatation means expanding effect who uses in autologous internal arteriovenous fistula formation technique operation process not good, arouse vascular damage easily, lead to the technical problem that the operation success rate is low, the utility model provides a vascular expander can expand the operation blood vessel fast and do not harm the blood vessel in the operation process.

Description

Medical vascular dilator of injury prevention

Technical Field

The utility model relates to a medical vascular expander of damage prevention is a device that is used for expanding operation blood vessel among the forming art in-process of autologous sound arteriovenous internal fistula in kidney internal medicine field.

Background

With the gradual improvement of medical diagnosis and treatment technology level, the number of patients diagnosed with uremia per year is increased year by year, and the patients are often subjected to subsequent long-term renal replacement therapy. With the selection of three modalities of renal replacement therapy (hemodialysis, peritoneal dialysis and kidney transplantation), most patients tend to prefer hemodialysis replacement more. One pressing problem for patients undergoing long-term hemodialysis is the need to establish a long-term hemodialysis access. There are three current long-term hemodialysis access routes, the first: the autoarteriovenous internal fistula forming operation is characterized in that: the wound is small, the cost is low, the long-term use can be realized, and the preference is generally recommended; secondly, the method comprises the following steps: the arteriovenous internal fistula artificial vascular shunt is suitable for patients who have unsatisfactory wrist vascular conditions and cannot perform autologous arteriovenous internal fistula formation, can be used for a long time, but is extremely expensive, has large wound, has high requirement on cardiac function and poor cardiac function, and is easy to have cardiac insufficiency after operation; thirdly, the method comprises the following steps: the semi-permanent catheter indwelling is suitable for patients who have poor conditions of double upper limb blood vessels or poor cardiac function, cannot perform autologous arteriovenous internal fistula formation or arteriovenous internal fistula artificial blood vessel circumfluence, and do not want to change peritoneal dialysis for replacement. Due to the influence of long-term hypertension and abnormal calcium and phosphorus metabolism, the blood vessel condition of a patient with uremia is not ideal, the blood vessel is thin and has a small inner diameter or atherosclerotic plaques in the blood vessel cavity are formed frequently, so that the blood vessel anastomosis of the patient in the operation process is difficult, or internal fistula is easy to narrow or even blocked after the operation. In the existing operation process of the autologous arteriovenous internal fistula, if the condition of a blood vessel of a patient is poor, an operating doctor needs to expand the blood vessel in the operation, at present, the slender part at the tip of an ophthalmic forceps is often used for extending into a blood vessel cavity for simple expansion, but because the slender part at the tip of the ophthalmic forceps is often shorter and about 2-3cm long, the expandable blood vessel has limited length and is often limited to an anastomotic stoma part. Moreover, the degree of vessel dilation is often dependent on the experience and feel of the operating physician, and vessel or intimal damage may occur during dilation. Therefore, after anastomosis, it is often seen that the blood vessels around the anastomotic opening are obviously full and thick, but the blood vessels at the unexpanded part are still thin and have insignificant changes, so that the internal fistula fails. Thus, good vascular conditions, i.e. a thicker vessel inner diameter, are a key condition for successful surgery.

Aiming at solving the problems, the injury-preventing medical blood vessel dilator device used in the operation process is designed for the purpose. The vessel dilator is used for gradually dilating fine or narrow vessels from thin to thick by using the outer diameter of the vessel dilator which gradually changes from thin to thick so as to meet the requirement of the operation, reduce the damage of the vessels, improve the success rate of the operation, reduce the risk of the failure of the operation of a patient and avoid the secondary operation.

SUMMERY OF THE UTILITY MODEL

In order to solve the current vasodilatation means that uses in the operation process of autologous arteriovenous internal fistula expanding effect expansion effect not good, arouse vascular damage easily, lead to the technical problem that the operation success rate is low, the utility model provides a medical vascular expander of damage prevention can expand the operation blood vessel fast and do not harm the blood vessel in the operation process.

The utility model provides a technical scheme that its technical problem adopted is:

an anti-injury medical blood vessel dilator is characterized in that: including flexible pipe, setting at the syringe connector of flexible pipe entry end and the pyramis of setting at flexible pipe exit end, syringe connector, flexible pipe and pyramis communicate in proper order, the pyramis is the cavity taper pipe, the diameter of pyramis from the pyramis free end to with flexible pipe junction grow gradually, be provided with a plurality of water conservancy diversion holes on the lateral wall of pyramis.

Further, the length of the flexible conduit is 4-12cm, and the length of the cone part is 5-8 cm.

Furthermore, the diversion holes on the side wall of the cone part are distributed in a layered mode, the interval between every two adjacent layers of diversion holes is 0.8-1cm, and each layer is provided with at least three diversion holes.

Further, the diameter of the free end of the cone part to the joint of the cone part and the flexible conduit is gradually increased from 0.8-1.0mm to 2.3-2.7 mm.

Furthermore, the syringe connector, the flexible conduit and the cone are made of flexible polymer materials.

The utility model has the advantages of as follows:

1) the utility model discloses a medical blood vessel dilator utilizes the appearance mechanical expansion blood vessel of blood vessel dilator pyramis self by thin to thick gradual change, simple manufacture, and the size is little, uses fast, convenient, easily masters.

2) The utility model discloses a medical blood vessel dilator low price avoids using expensive medical consumptive material, alleviates patient's economic burden.

3) The utility model can inject heparin saline into the blood vessel to heparinize while expanding the blood vessel, so as to prevent the blood from coagulating and forming thrombus;

4) the pressure is slowly increased from small to large in the expansion process, so that the vascular injury caused by sudden pressure change in the previous expansion process is avoided, and the vessel cone obtuse angle design and the vessel outer wall are smooth and burr-free so as to avoid the vascular endothelial injury and reduce the risk of thrombosis.

Drawings

Fig. 1 is a schematic structural view of an injury-preventing medical blood vessel dilator of the present invention;

fig. 2 is an enlarged view of the tapered portion of fig. 1.

The attached drawings are illustrated as follows: 1-cone part, 2-injector connector, 3-flexible conduit and 4-diversion hole.

Detailed Description

The structure and operation of the present invention will be further explained with reference to the accompanying drawings.

Example 1: as shown in figure 1, the injury-preventing medical vascular dilator device comprises a flexible catheter 3, a syringe connector 2 arranged at the inlet end of the flexible catheter and a cone 1 arranged at the outlet end of the flexible catheter, wherein the syringe connector, the flexible catheter and the cone are communicated in sequence. The cone part 1 is a hollow conical pipe, and a plurality of flow guide holes 4 are formed in the side wall. Wherein, the flexible conduit and the syringe connector adopt an integral type to be connected, and the flexible conduit and the pyramis adopt an integral type to be connected. The syringe connector is used for connecting a syringe. The expander is earlier when using and connects the syringe that contains heparin saline on the syringe connector, then pack flexible pipe chamber and pyramis with heparin saline and carry out the heparinization, later utilize the pyramis that will be connected with the flexible pipe that contains heparin saline to insert in the blood vessel chamber, and slowly send into, utilize the pyramid appearance of pyramis self by thin to thick expansion blood vessel gradually, simultaneously at the in-process of sending into the blood vessel chamber, send into the pipe on the limit, inject the syringe that the syringe connector is connected on the limit, permeate heparin saline to the blood vessel through vertebra free end and side water conservancy diversion hole, heparinize and solidify the thrombus with the hemostatic liquid and form. After the vessel is satisfactorily dilated, the vessel dilator is gradually pulled out, and then the vessel anastomosis operation is carried out.

Example 2: in order to ensure that the blood vessel can be fully expanded without injury during the operation, the length of the flexible catheter is generally designed to be 4-12cm, and the length of the cone part is designed to be 5-8 cm.

Example 3: as shown in figure 2, in order to evenly inject the heparin saline, the diversion holes are distributed in a layered manner, the interval between the diversion holes between adjacent layers is 0.8-1cm, and each layer is provided with three diversion holes.

The flexible conduit 3 and the syringe connector 2 are both made of nontoxic, aseptic and high-molecular materials (such as polyvinyl chloride materials) with good affinity for human bodies, have good light transmission, higher elastic modulus and good rebound resilience, and are not easy to deform or break.

The flexible conduit and the cone are integrated, the cone is designed to be at an obtuse angle for scratch prevention, and the outer wall of the conduit is smooth and has no burrs. The syringe connector 2 is of a fixed size and can be connected with syringes of different capacities, the connector is tightly connected with the syringes, and the phenomenon that the connector and the syringes fall off cannot occur in the syringes injected by different pressures.

Example 4: a use method of an injury-preventing medical vascular dilator comprises the following steps:

1) the syringe connector of the medical vascular dilator is connected with a heparin saline syringe;

2) a heparin saline injector is injected, and the flexible catheter and the cone of the dilator are filled with heparin saline;

3) sending the free end of the cone part into the blood vessel to be dilated, and dilating the blood vessel by utilizing the diameter change of the cone part;

4) the flexible catheter is sent into the expanded blood vessel under the drive of the cone part, and the injector is pushed simultaneously, so that the heparin saline permeates into the blood vessel through the flow guide holes at the free end and the side wall of the cone part.

Example 5: a method of simulating vasodilation, comprising the steps of:

2) a bolus injector, heparin saline filling the flexible conduit and the cone of the dilator;

3) sending the cone part into the simulated blood vessel, and expanding the simulated blood vessel by utilizing the diameter change of the cone part;

4) the catheter is sent into the expanded simulated blood vessel under the drive of the cone part, the injector is pushed simultaneously, and the heparin saline permeates into the simulated blood vessel through the flow guide holes on the free end and the side wall of the cone part to carry out heparinization on the simulated blood vessel.

The simulated blood vessel used in the method is obtained by simulating the blood vessel in the human body by using the existing simulation technology.

Claims

1. An anti-injury medical blood vessel dilator is characterized in that: the flexible pipe injector comprises a flexible pipe, an injector connector arranged at the inlet end of the flexible pipe and a cone arranged at the outlet end of the flexible pipe, wherein the injector connector, the flexible pipe and the cone are sequentially communicated, the cone is a hollow cone pipe, the diameter of the cone is gradually increased from the free end of the cone to the joint of the cone and the flexible pipe, and a plurality of flow guide holes are formed in the side wall of the cone; the length of the flexible conduit is 4-12cm, and the length of the cone part is 5-8 cm.

2. The atraumatic medical vascular dilator of claim 1, wherein: the diversion holes on the side wall of the cone part are distributed in a layered mode, the interval between every two adjacent layers of diversion holes is 0.8-1cm, and each layer is provided with at least three diversion holes.

3. The atraumatic medical vascular dilator of claim 1 or 2, wherein: the diameter of the free end of the cone part to the joint of the cone part and the flexible conduit is gradually increased from 0.8-1.0mm to 2.3-2.7 mm.

4. The atraumatic medical vascular dilator of claim 3, wherein: the syringe connector, the flexible conduit and the cone are all made of flexible high polymer materials.