CN222533374U - High and low temperature ablation needle with balloon and ablation device - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of cryogenic cryotherapy, in particular to a high-low temperature ablation needle with a balloon and ablation equipment, comprising a puncture probe, a rewarming component, the balloon, a liquid inlet pipe, an air return pipe and a vacuum pipe; the vacuum tube is connected with the puncture probe, the liquid inlet tube and the air return tube are sequentially arranged in the vacuum tube in a penetrating manner from inside to outside, the rewarming assembly is connected with the puncture probe, the puncture probe is provided with a liquid inlet hole and a liquid outlet hole which are mutually communicated, the air return tube is communicated with the liquid outlet hole and used for outputting ablation working media, and the balloon is sleeved on the puncture probe and is communicated with the liquid outlet hole. According to the utility model, the balloon is added on the puncture probe, so that the balloon body can be well attached to the cavity tumor by utilizing the expansibility of the balloon under the condition of ensuring that the basic effect of the ablation needle is not influenced, the cold energy can be well transferred, and the product can be better suitable for various surgical scenes by combining the freezing structures of the vacuum tube and the balloon.

Description

High-low temperature ablation needle with balloon and ablation equipment

Technical Field

The embodiment of the utility model relates to the technical field of cryocryotherapy, in particular to a high-low temperature ablation needle with a balloon and ablation equipment.

Background

The current cryoablation technology for treating tumors is very rapid in development, mainly uses a refrigeration technology to refrigerate or directly uses the cold energy of a low-temperature working medium to carry out cryotherapy on target tissues, wherein the former is represented by a gas throttling refrigeration technology, and the latter is represented by a liquid nitrogen direct refrigeration technology.

The cryoablation system using gas throttling technology is represented by argon helium knife, realizes the treatment process of freezing and re-warming by argon throttling refrigeration and helium throttling heating, and the system is characterized in that the gas before throttling is in the normal temperature range, is easy to realize, but in order to ensure the treatment effect, a high-pressure air source with higher safety risk level (such as up to 40 MPa) needs to be configured, so that the transportation and storage are inconvenient, and the cost is higher.

The liquid nitrogen cryoablation system directly pressurizes low-temperature liquid nitrogen and then conveys the liquid nitrogen into an ablation needle, and then realizes the freezing process of the tumor through the endothermic evaporation of the liquid nitrogen, and the reheating process can adopt absolute ethanol vapor heating or heating modes such as radio frequency, microwave and the like. Liquid nitrogen is easier to obtain and has lower temperature, and the pressure during the use process is far smaller than that of a gas throttling technology (about 0.3MPa to 0.5 MPa), so that the liquid nitrogen has better economy and applicability.

The existing liquid nitrogen cryoablation system is represented by a cold and hot knife, is mainly applied to surgical puncture and is aimed at the cryotherapy of solid tumors, and has an unobvious effect on the treatment of cavity tumors, so that a cryoablation system which can be compatible with cavity tumors and solid tumors at the same time is urgently needed.

Disclosure of utility model

The embodiment of the utility model provides a high-low temperature ablation needle with a balloon, which comprises a puncture probe, a rewarming component, the balloon, a liquid inlet pipe, an air return pipe and a vacuum pipe;

The vacuum tube is connected with the puncture probe, and the liquid inlet tube and the air return tube are sequentially arranged in the vacuum tube in a penetrating manner from inside to outside;

The rewarming assembly is connected with the puncture probe;

the puncture probe is provided with a liquid inlet hole and a liquid outlet hole which are communicated with each other;

the liquid inlet pipe is communicated with the liquid inlet hole and is used for inputting an ablation working medium;

the air return pipe is communicated with the liquid outlet and is used for outputting an ablation working medium;

The saccule is sleeved on the puncture probe and is communicated with the liquid outlet hole.

Based on the above scheme, when the ablation needle is not used (fluid is not introduced), the balloon is in a contracted state, when the ablation needle is used, liquid nitrogen is introduced into the liquid inlet pipe, liquid nitrogen flows out from the liquid outlet hole, most of the liquid nitrogen exchanges cold with the outside, becomes nitrogen to flow back from the air return pipe, and a small part of the liquid nitrogen enters the balloon to exchange cold with the surface of the balloon, and also flows back from the air return pipe after becoming nitrogen, and the continuous liquid nitrogen fluid ensures the stability of the external dimension of the balloon, and can be understood as that the balloon is opened due to pressure, so that the balloon can be well attached to cavity tumors in operation, and better cold transfer is realized, so that the ablation needle is better suitable for various operation scenes.

In one possible scheme, the liquid inlet hole is positioned at the top of the puncture probe close to one end of the vacuum tube, and the liquid outlet hole is positioned on the side wall of the puncture probe and corresponds to the position of the balloon. To increase fluid flow properties.

In one possible scheme, a plurality of liquid outlet holes are formed, and the plurality of liquid outlet holes are uniformly distributed along the axial direction of the puncture probe.

In one possible solution, the radius of the balloon from both ends to the center increases gradually along the axial direction of the puncture probe.

In one possible solution, a reflective layer and/or a heat absorbing layer are/is arranged outside the muffler, the reflective layer is used for reflecting light rays and heat radiation, and the heat absorbing layer is used for absorbing heat.

In one possible scheme, the rewarming assembly comprises a metal rod and a wire, wherein the wire is arranged in the liquid inlet pipe in a penetrating way;

The metal rod is arranged in the vacuum tube and is in contact with the puncture probe, and the wire is wound on the metal rod so as to realize vortex heating of the puncture probe.

In one possible approach, the rewarming assembly comprises a head electrode, a tail electrode, a wire and a connecting ring;

The connecting ring is arranged between the head electrode and the tail electrode, so that the head electrode and the tail electrode are insulated and isolated;

The lead is respectively communicated with the head electrode and the tail electrode so as to realize bipolar heating of the puncture probe.

In one possible approach, the cryoablation needle further comprises a handle, a delivery vacuum tube and an abutment;

The proximal end of the handle is connected with the vacuum tube, the distal end of the handle is connected with the transmission vacuum tube, and the liquid inlet tube is communicated with the transmission vacuum tube;

The opposite plug is arranged at the far end of the transmission vacuum tube and used for accessing the ablation working medium.

The embodiment of the utility model also provides an ablation device, which comprises the high-low temperature ablation needle in any one of the possible schemes.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a first embodiment of a high/low temperature ablation needle;

FIG. 2 is a partial cross-sectional view of a high/low temperature ablation needle in accordance with a first embodiment of the utility model;

FIG. 3 is a schematic diagram of a second embodiment of a high/low temperature ablation needle;

FIG. 4 is a schematic view of a high/low temperature ablation needle according to a second embodiment of the utility model;

fig. 5 is a schematic view of a high and low temperature ablation needle in accordance with a third embodiment of the utility model.

Reference numerals in the drawings:

1. The puncture probe comprises a puncture probe body, 101, a liquid outlet hole, 2, a balloon, 3, a vacuum tube, 4, a handle, 5, a transmission vacuum tube, 6, an opposite plug, 7, a heat absorption layer, 8, a reflection layer, 9, an air return pipe, 10, a liquid inlet pipe, 11, a conducting wire, 12, a metal rod, 13, a front electrode, 14, a connecting ring, 15 and a tail electrode.

Detailed Description

The inventors of the present application found that there are at least the following problems in the prior art:

(1) The front end overall structure of the existing high-low temperature ablation needle is of a stainless steel probe structure, so that the puncture epidermis is convenient to enter the tumor position in the body, the applicability to solid tumors is good, but the applicability to cavity tumors is poor, the cooling can be better and faster because the solid medium is required for the transmission of cold, the gas in the cavity tumors can influence the transmission of the cold, and the cryoablation tumors cannot be well realized.

(2) In the thawing process of the conventional high-low temperature ablation needle Wen Duowei, no good high temperature is adopted to kill cancer cells again, absolute ethyl alcohol is generally adopted as a rewarming medium, absolute ethyl alcohol is adopted as inflammable gas, a certain danger exists, the problem that alcohol needs to be added regularly exists, the cooled pipeline needs to be heated integrally after alcohol rewarming, heat can be transferred to the front end of a product, the problem of long time exists, and the continuous freezing time in the later period can be prolonged.

(3) When the high-low temperature ablation needle is subjected to high-temperature re-heating, heat is easily transmitted to the surface of the catheter, and the problem of heat transmission at an unexpected part exists.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and are for example, as being fixedly connected, as being detachably connected, as being integral, as being mechanically connected, as being electrically connected, as being communicatively connected, as being directly connected, as being indirectly connected through an intermediary, as being internally connected or as being in interaction with two elements, unless otherwise explicitly limited. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Example 1

Fig. 1 is a schematic view of a high-low temperature ablation needle in a first embodiment of the present utility model, fig. 2 is a partial sectional view of the high-low temperature ablation needle in the first embodiment of the present utility model, fig. 3 is a schematic view of the high-low temperature ablation needle in the first embodiment of the present utility model, and as shown in fig. 1-3, the high-low temperature ablation needle with a balloon 2 in the present embodiment comprises a puncture probe 1, a balloon 2, a rewarming assembly, a liquid inlet tube 10, an air return tube 9 and a vacuum tube 3.

Specifically, the vacuum tube 3 and the rewarming component are respectively connected with the puncture probe 1, and the liquid inlet tube 10 and the air return tube 9 are sequentially arranged in the vacuum tube 3 from inside to outside. In this embodiment, the vacuum tube 3, the liquid inlet tube 10 and the air return tube 9 are concentrically arranged. The temperature recovery component is electrically connected with the puncture probe 1 so as to heat the puncture probe 1. The puncture probe 1 is provided with a liquid inlet hole and a liquid outlet hole 101 which are communicated with each other, the liquid inlet hole is arranged at the top of the puncture probe 1, the liquid outlet hole 101 is arranged on the side wall of the puncture probe 1, the liquid inlet pipe 10 is communicated with the liquid inlet hole and used for inputting fluid, the air return pipe 9 is communicated with the liquid outlet hole 101 and used for outputting fluid, and the balloon 2 is sleeved on the puncture probe 1 and is communicated with the liquid outlet hole 101.

Preferably, a plurality of liquid outlet holes 101 are provided, and the plurality of liquid outlet holes 101 are uniformly arranged along the axial direction of the puncture probe, so that liquid nitrogen is uniformly output from the liquid outlet holes to gradually expand the balloon.

Through the above, it is not difficult to find that when not in use (fluid is not introduced), the balloon 2 is in a contracted state, when in use, liquid nitrogen is introduced into the liquid inlet pipe 10, liquid nitrogen flows out from the liquid outlet hole, most of the liquid nitrogen exchanges cold with the outside, becomes nitrogen to flow back from the air return pipe 9, a small part of the liquid nitrogen enters the balloon 2 to exchange cold with the surface of the balloon 2, and also flows back from the air return pipe 9 after becoming nitrogen, the continuous liquid nitrogen fluid ensures the stability of the external dimension of the balloon 2, and can be understood as that the balloon 2 is opened due to pressure, so that the balloon can be well attached to a cavity tumor in operation, and better cold transfer is realized.

Optionally, along the axial direction of the puncture probe, the radius from two ends to the center of the balloon 2 is gradually increased to be in an elliptical shape, the whole balloon 2 is in a shape similar to a cylinder in the middle of a cone at two ends, the resistance of the cavity entering and exiting channel can be reduced, and the molding is simpler. And so configured, balloon 2, when expanded, is shaped like an oblong body, and more easily conforms to a lesion, such as a cavity tumor.

In addition, the material of the balloon 2 is generally PA (Polyamide, thermoplastic linear polyamide) material, and the PA material has high mechanical strength, good toughness, high tensile strength and compressive strength, excellent fatigue resistance and original mechanical strength after repeated bending of parts. In addition, the PA material has the advantages of high softening point, heat resistance, smooth surface, good wear resistance, corrosion resistance, no inertia to bioerosion, good antibacterial and mildew-proof properties, electric insulation, light weight of parts and the like.

In this embodiment, the reflective layer 8 and the heat absorbing layer 7 are provided outside the muffler 9. The reflecting layer 8 is used for reflecting light and radiation, such as aluminum foil, which is a material that can reflect light better. The heat absorbing layer 7 is used for absorbing heat, such as cotton, and can absorb residual heat well. Because the high temperature transmission is different from the low temperature transmission, in the high temperature transmission, heat radiation, heat conduction and heat convection exist at the same time, the vacuum layer can well prevent heat conduction and heat convection, but heat radiation is difficult to prevent, and the added reflecting layer 8 and heat absorbing layer 7 can well prevent heat radiation, so that the surface temperature of a product is kept normal.

In addition, the wire 11 is provided with an insulating sheath to improve safety.

As shown in fig. 3, in the rewarming assembly of the high and low temperature ablation needle of the present embodiment, specifically, the penetration probe 1 is provided with a metal rod 12, and the wire 11 is wound around the metal rod 12. The eddy current principle is adopted, the ablation equipment end provides high-frequency alternating current, a rapidly-changing magnetic field is generated around the lead 11, induced current is generated in the metal rod 12 by the rapidly-changing magnetic field, heat generated by the metal rod 12 is rapidly generated, and the heat is rapidly transmitted to the puncture probe 1 through connection with the puncture probe 1, so that rapid, efficient and safe temperature rise is realized.

Example two

Fig. 4 is a schematic view of a high-low temperature ablation needle in a second embodiment of the present utility model, as shown in fig. 4, in which the second embodiment is an alternative of the first embodiment, and is different in that in the second embodiment, a rewarming assembly of the high-low temperature ablation needle in the present embodiment, specifically, the rewarming assembly includes a lead 11, a head electrode 13, a tail electrode 15 and a connection ring 14, the connection ring 14 is disposed between the head electrode 13 and the tail electrode 15, and insulates the two, and the lead 11 is respectively connected to the head electrode 13 and the tail electrode 15. The bipolar principle is adopted, the head electrode 13 and the tail electrode 15 are respectively connected with a wire 11, the middle is connected and electrically isolated through a connecting ring 14, the connecting ring 14 is made of insulating materials (such as ceramics, and the like), high-frequency current is emitted from the equipment end, flows into the head electrode 13 through the wire 11, generates a large amount of heat at the contact position of the head electrode 13 and tissues, realizes rapid and safe temperature rise, and the current flows through human tissues, returns to the wire 11 from the tail electrode 15 and finally returns to the equipment end.

Example III

Fig. 5 is a schematic view of a high-low temperature ablation needle according to a third embodiment of the present utility model, where the high-low temperature ablation needle further includes a handle 4, a transmission vacuum tube 5, and an opposite connector 6, the proximal end of the handle 4 is connected to the vacuum tube 3, the distal end is connected to the transmission vacuum tube 5, and a liquid inlet tube 10 is connected to the transmission vacuum tube 5, and the opposite connector 6 is disposed at the distal end of the transmission vacuum tube 5 for accessing a fluid.

In summary, the ablation needle has the following advantages:

(1) The application range of the product is increased, and the cryoablation of cavity tumors is increased on the premise of not affecting the original use effect, so that the application of more scenes can be adapted;

(2) The heat preservation and heat insulation are safer, and unexpected temperature rise can not occur in the use process of the product;

(3) The temperature rise is faster, safer and controllable, the heating of the whole pipeline is avoided, the time is saved, the alternation of cold and hot is realized, and cancer cells are better killed.

Example IV

The present embodiment also provides an ablation apparatus including the high-low temperature ablation needle described in any of the above embodiments.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intervening medium.

Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is at a lower level than the second feature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims (10)

1. The high-low temperature ablation needle with the balloon is characterized by comprising a puncture probe, a rewarming component, the balloon, a liquid inlet pipe, an air return pipe and a vacuum pipe;

The vacuum tube is connected with the puncture probe, and the liquid inlet tube and the air return tube are sequentially arranged in the vacuum tube in a penetrating manner from inside to outside;

The rewarming assembly is connected with the puncture probe;

the puncture probe is provided with a liquid inlet hole and a liquid outlet hole which are communicated with each other;

the liquid inlet pipe is communicated with the liquid inlet hole and is used for inputting an ablation working medium;

the air return pipe is communicated with the liquid outlet and is used for outputting an ablation working medium;

The saccule is sleeved on the puncture probe and is communicated with the liquid outlet hole.

2. The needle of claim 1, wherein the fluid inlet is located at a top of the piercing probe near one end of the vacuum tube, and the fluid outlet is located on a side wall of the piercing probe and corresponds to the balloon.

3. The high and low temperature ablation needle according to claim 2, wherein a plurality of the liquid outlet holes are provided, and the plurality of the liquid outlet holes are uniformly arranged along the axial direction of the puncture probe.

4. The cryoablation needle of claim 1 wherein the radius of the balloon increases gradually from both ends to the center along the axis of the penetration probe.

5. The high-low temperature ablation needle according to claim 1, wherein a reflecting layer and/or a heat absorbing layer are/is arranged outside the muffler, the reflecting layer is used for reflecting light rays and heat radiation, and the heat absorbing layer is used for absorbing heat.

6. The high and low temperature ablation needle according to claim 1, wherein the rewarming assembly comprises a metal rod and a wire, the wire being threaded into the liquid inlet tube;

The metal rod is arranged in the vacuum tube and is in contact with the puncture probe, and the wire is wound on the metal rod.

7. The cryoablation needle of claim 1 wherein the rewarming assembly is disposed within the vacuum tube and connected to the piercing probe;

The rewarming component comprises a head electrode, a tail electrode, a wire and a connecting ring;

The connecting ring is arranged between the head electrode and the tail electrode, so that the head electrode and the tail electrode are insulated and isolated;

The lead is respectively communicated with the head electrode and the tail electrode.

8. The needle of claim 6 or 7, wherein the wire is provided with an insulating sheath.

9. The cryoablation needle of claim 1 further comprising a handle, a delivery vacuum tube and an opposite plug;

The proximal end of the handle is connected with the vacuum tube, the distal end of the handle is connected with the transmission vacuum tube, and the liquid inlet tube is communicated with the transmission vacuum tube;

The opposite plug is arranged at the far end of the transmission vacuum tube and used for accessing the ablation working medium.

10. An ablation device comprising the cryoablation needle of any one of claims 1-9.