CN214231495U

CN214231495U - Freezing sacculus pipe of area heating function

Info

Publication number: CN214231495U
Application number: CN202022301971.3U
Authority: CN
Inventors: 肖家华; 李恩光
Original assignee: Shanqian Zhuhai Medical Technology Co ltd
Current assignee: Shanqian Zhuhai Medical Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-09-21
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a freezing balloon catheter with a heating function, which comprises a catheter, a temperature controller and an external power supply, wherein the outer wall of the catheter comprises an inner layer, a middle layer and an outer layer which are sequentially arranged from inside to outside; the middle layer comprises a metal mesh grid, and the metal mesh grid, the temperature controller and the external power supply form a power supply loop. The freezing sacculus catheter with the heating function is characterized in that the metal woven mesh with the heat conduction function is arranged in the middle layer of the outer wall of the freezing sacculus catheter, the metal woven mesh is connected to an external power supply, the metal woven mesh can generate heat after being electrified, and the temperature of the outer surface of the catheter is kept within a set temperature, so that the effect of cryoablation can be guaranteed, and a series of problems that when low-temperature fluid is introduced into the freezing sacculus catheter, the low-temperature fluid transfers cold energy to the outer surface of the freezing sacculus catheter, and blood vessels outside the freezing sacculus catheter are frozen, human tissues are frozen and the like are caused can be solved.

Description

Freezing sacculus pipe of area heating function

Technical Field

The utility model relates to a cryoablation apparatus technical field, concretely relates to freezing sacculus pipe of area heating function.

Background

In the medical industry, cryoballoon catheters for interventional procedures currently suffer from the following problems:

the catheter enters the human body through the blood vessel of the human body, the outer diameter is generally 3-4 mm, and the wall of the catheter is thin in order to ensure enough inner diameter space. When the saccule conduit is introduced with the low-temperature fluid, the cold energy can be transferred from the interior of the conduit to the outer surface of the conduit due to the fact that the wall of the conduit is thin and the heat insulation effect is not obvious. When the temperature of the fluid introduced into the catheter is low enough (such as < -80 ℃), the blood flowing on the outer surface of the catheter is affected, and even the phenomenon that the frozen blood vessel freezes and damages human tissues occurs. This can jeopardize the life safety of the patient undergoing the operation.

Therefore, a cryoballoon catheter is needed to be designed, which can avoid the damage to human tissues due to the low temperature of the outer surface of the catheter, on the premise of ensuring the cryoablation effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a freezing sacculus pipe of area heating function to when letting in cryogenic fluid among the solution prior art in freezing sacculus pipe, can exert an influence to the blood that the pipe surface flows, the problem that freezes the blood vessel and freezes human tissue appears even.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a freezing balloon catheter with a heating function comprises a catheter and an external power supply, wherein the outer wall of the catheter comprises an inner layer, a middle layer and an outer layer which are sequentially arranged from inside to outside; the middle layer comprises a metal woven net, and the metal woven net is connected to a power supply circuit of an external power supply.

Further, the metal mesh grid is a grid-shaped metal wire mesh grid formed by mutually interweaving a plurality of metal wires.

Furthermore, a temperature controller is arranged on a power supply loop formed by the external power supply and the metal mesh grid.

Further, the outer layer is made of a block polyether amide resin material.

Further, the inner layer is made of block polyether amide resin materials.

Further, the temperature controller is electrically connected with a thermocouple embedded in the outer wall of the guide pipe.

Further, the thermocouple is embedded in the middle layer of the conduit at the position where the thermocouple is embedded in the conduit.

Further, the woven wire mesh has a proximal end and a distal end, and the positive and negative electrodes of each wire in the woven wire mesh are led out from the proximal end.

Further, the far end of the metal wire mesh grid is provided with a conducting ring, and the positive pole and the negative pole of each metal wire in the metal wire mesh grid are connected to the conducting ring at the far end.

Furthermore, a deflection guide wire is arranged on the outer side of the outer wall of the catheter, and the deflection guide wire, the metal mesh grid and the external power supply form a power supply loop.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a take freezing sacculus pipe of heating function, set up the metal mesh grid who has the heat conduction function in the intermediate level of freezing sacculus pipe outer wall, and be connected to external power source with the metal mesh grid on, can generate heat after the metal mesh grid circular telegram, guarantee that the temperature of pipe surface keeps in the temperature of settlement, can guarantee the effect of cryoablation like this, can prevent again that the cryogenic fluid in the freezing sacculus pipe from transmitting the pipe with the cold energy and leading to the problem that human tissue is frozen out.

2. The utility model provides a take freezing sacculus pipe of heating function, the latticed wire mesh grid that is formed by interweaving a plurality of wires each other, calorific capacity after the circular telegram is big, can evenly generate heat in each department of pipe outer wall moreover, can guarantee better that pipe surface temperature everywhere keeps in required temperature range, avoids the pipe to generate heat inhomogeneous influence to the outer human tissue of pipe everywhere.

3. The utility model provides a take freezing sacculus pipe of heating function sets up the temperature controller on the power supply circuit that external power source and metal mesh grid constitute, and the power that generates heat of metal mesh grid can be controlled to the temperature controller, better with pipe outer wall temperature control in required temperature range.

4. The utility model provides a take freezing sacculus pipe of heating function, the thermocouple of being connected with the temperature controller is embedded into the intermediate layer of pipe, can be more closely, measure the temperature that generates heat of metal mesh grid more accurately to the temperature signal that will measure feeds back to the temperature controller, and the temperature controller can more in time accurately control the power that generates heat of metal mesh grid, is favorable to pipe outer wall temperature to keep in required temperature range steadily for a long time.

5. The utility model provides a take freezing sacculus pipe of heating function, the positive pole and the negative pole of every wire are drawn forth from the near-end in the wire mesh grid to be connected to the conducting ring of wire mesh grid distal end, many wires constitute parallel circuit like this, can increase the calorific capacity of wire mesh grid.

6. The utility model provides a take freezing sacculus pipe of heating function sets up the seal wire that deflects at the pipe outer wall, and the seal wire that deflects, metal mesh grid and external power source can constitute power supply loop, and the ability of generating heat that can make full use of metal mesh grid like this, and then reduces external power source's heating voltage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a connection structure between a cryoballoon catheter and an external power source according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a metal wire mesh grid in an embodiment of the present invention;

fig. 3 is a schematic view of a connection structure between the cryoballoon catheter and an external power source according to a second embodiment of the present invention.

Description of reference numerals: 101. an inner layer; 102. a metal mesh grid; 103. an outer layer; 104. conducting rings; 2. an external power supply; 3. a temperature controller; 4. a thermocouple; 5. the guidewire is deflected.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The freezing balloon catheter with the heating function shown in fig. 1 and fig. 2 is applied to the field of low-temperature medical instruments, and the temperature of the cryogenic fluid introduced into the freezing balloon catheter is generally below-80 ℃. The freezing balloon catheter comprises a catheter and an external power supply 2, the outer wall of the catheter comprises an inner layer 101, a middle layer and an outer layer 103 which are sequentially arranged from inside to outside, and the inner layer 101 and the outer layer 103 are both made of PEBAX (block polyether amide resin) materials; the middle layer is a metal mesh grid 102, and the metal mesh grid 102 is connected to a power supply loop of the external power supply 2.

According to the freezing sacculus catheter with the heating function, the metal woven net 102 with the heat conduction function is arranged in the middle layer of the outer wall of the freezing sacculus catheter, the metal woven net 102 is connected to the external power supply 2, the metal woven net 102 can generate heat after being electrified, and the temperature of the outer surface of the catheter is kept within a set temperature (for example, 10 +/-2 ℃), so that the effect of cryoablation can be guaranteed, and a series of problems that when low-temperature fluid is introduced into the freezing sacculus catheter, the low-temperature fluid transmits cold energy to the outer surface of the freezing sacculus catheter, blood vessels outside the freezing sacculus catheter are frozen, human tissues are frozen and the like can be solved.

In this embodiment, a temperature controller 3 is further disposed on the power supply circuit formed by the external power source 2 and the metal mesh grid 102, and the temperature controller 3 is electrically connected to a thermocouple 4 embedded in the middle layer of the conduit. The thermocouple 4 connected with the temperature controller 3 is embedded into the middle layer of the conduit, so that the heating temperature of the metal mesh grid 102 can be measured more closely and accurately, the measured temperature signal is fed back to the temperature controller 3, the temperature controller 3 can more timely and accurately control the heating power of the metal mesh grid 102, and the temperature of the outer wall of the conduit can be stably kept in a required temperature range for a long time.

As shown in fig. 2, the metal mesh 102 is a mesh-like metal wire mesh formed by interlacing a plurality of metal wires, and is woven by a special weaving process. The woven wire mesh has a proximal end and a distal end, the positive and negative poles of each wire in the woven wire mesh are led out from the proximal end, the distal end of the woven wire mesh is provided with a conductive ring 104, and the positive and negative poles of each wire in the woven wire mesh are connected to the conductive ring 104 at the distal end. According to the latticed metal wire mesh grid, a plurality of metal wires form a parallel circuit, the heating quantity after the metal wires are electrified is large, the heat can be uniformly generated at each position of the outer wall of the catheter, the temperature of each position on the outer surface of the catheter can be better ensured to be kept in a required temperature range, and the influence of nonuniform heating of each position of the catheter on human tissues outside the catheter is avoided.

Example two

As shown in fig. 3, a freezing balloon catheter with a heating function is different from the first embodiment in that a deflecting guide wire 5 is arranged on the outer wall of the catheter, the deflecting guide wire 5, a metal mesh grid 102, a temperature controller 3 and an external power supply 2 jointly form a power supply loop, the metal mesh grid 102 is connected with the positive pole of the external power supply 2, and the deflecting guide wire 5 is connected with the negative pole of the external power supply 2, which can fully utilize the heating capacity of the metal mesh grid 102 and further reduce the heating voltage of the external power supply 2 compared with the scheme in which the positive pole and the negative pole of the metal mesh grid 102 are led out from the same end and are respectively connected to the positive pole and the negative pole of the external power supply 2 in the first embodiment.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The freezing balloon catheter with the heating function is characterized by comprising a catheter and an external power supply (2), wherein the outer wall of the catheter comprises an inner layer (101), a middle layer and an outer layer (103) which are sequentially arranged from inside to outside; the middle layer comprises a metal woven mesh (102), and the metal woven mesh (102) is connected to a power supply circuit of an external power supply (2).

2. The freezing balloon catheter with heating function according to claim 1, wherein the metal woven mesh (102) is a mesh-like metal wire woven mesh in which a plurality of metal wires are interwoven.

3. The freezing balloon catheter with heating function according to claim 2, characterized in that a temperature controller (3) is further arranged on a power supply circuit formed by the external power supply (2) and the metal mesh grid (102).

4. The freezing balloon catheter with heating function as claimed in claim 1, wherein the outer layer (103) is made of block polyether amide resin material.

5. The freezing balloon catheter with heating function according to claim 1, wherein the inner layer (101) is made of block polyether amide resin material.

6. The freezing balloon catheter with heating function according to claim 3, characterized in that the temperature controller (3) is electrically connected with a thermocouple (4) embedded in the outer wall of the catheter.

7. The freezing balloon catheter with heating function according to claim 6, wherein the thermocouple (4) is embedded in the catheter at the middle layer of the catheter.

8. A freezing balloon catheter with heating function according to claim 3 or 6, wherein the woven wire mesh has a proximal end and a distal end, and the positive and negative poles of each wire in the woven wire mesh are led out from the proximal end.

9. A cryoballoon catheter with heating according to claim 8, wherein the distal end of the woven wire mesh is provided with an electrically conductive ring (104), the positive and negative poles of each wire in the woven wire mesh being connected to the electrically conductive ring (104) at the distal end.

10. The freezing balloon catheter with heating function according to claim 1, characterized in that a deflecting guide wire (5) is arranged on the outer side of the outer wall of the catheter, and the deflecting guide wire (5), the metal mesh (102) and the external power supply (2) form a power supply loop.