CN211633557U - Ablation needle tube, microwave ablation needle and microwave ablation therapeutic apparatus - Google Patents

Abstract

The embodiment of the utility model provides an it melts needle tube, microwave melts needle and microwave ablation therapeutic instrument, relate to the medical instrument field, this it melts needle tube possesses two at least passageways of mutual isolation, wherein, two at least passageways include first passageway and second passageway, the distal end and the near-end of first passageway run through respectively in the distal end and the near-end of melting needle tube, so that the radio frequency cable through first passageway can be connected with the radiation antenna electricity that sets up at the distal end of melting needle tube, first passageway is used for holding the coolant liquid that melts needle tube, the distal end and the near-end of second passageway run through respectively in the distal end and the near-end of melting needle tube, so that the connecting cable through the second passageway can be connected with the auxiliary element electricity that sets up at the distal end of melting needle tube. The ablation needle tube not only can enable the radiation antenna to work normally, but also can enable the auxiliary element to work normally, has various functions, and can assist a minimally invasive surgery to be implemented better.

Description

Ablation needle tube, microwave ablation needle and microwave ablation therapeutic apparatus

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to an melt needle tubing, microwave ablation needle and microwave ablation therapeutic instrument.

Background

The incidence and mortality of lung cancer are the first of malignant tumors in China and even the world, and currently, the lung cancer is mainly treated by means of excision of diseased lungs or lung lobes through thoracotomy or thoracoscopy surgery or combination of traditional medicine chemotherapy and the like. With the rapid development of the medical industry, minimally invasive treatment is becoming the first choice for patients.

Microwave ablation is applied more and more widely as a minimally invasive surgery, microwave energy is transmitted to the far end of a flexible ablation needle through an ablation line by utilizing the heat effect of microwave biological tissues and is radiated to tumor focus tissues to perform hemostasis, coagulation, burning or inflammation elimination, detumescence, pain relief, local tissue blood circulation improvement and the like on pathological tissues so as to achieve the effect of treating diseases. It has the advantages of small wound, quick effect, strong penetrating power and the like, and is accepted by more and more patients.

Most of microwave ablation minimally invasive surgery adopts ultrasonic or X-ray imaging equipment and the like to position a focus, and then adopts an external ablation needle to directly puncture skin, so as to achieve microwave ablation after reaching the focus. The minimally invasive microwave ablation is limited by external conditions such as the physical condition of a patient, the position of a focus, the length of an ablation needle rod and the like, meanwhile, the puncture needle channel cannot completely ensure that the needle channel can reach the focus position safely and accurately, and the direct puncture easily causes pleural injury, forms adverse complications such as pneumothorax and the like, and brings risks to the operation. With the increasing maturity of microwave ablation technology, the design of microwave ablation needles is more and more targeted, and with the emergence of endoscope microwave ablation needles, the microwave ablation technology is improved to a new step, and the new technology guides a microwave ablation antenna to lung tumor and pathological change tissue more intuitively with the help of an endoscope clamping channel.

The research of the inventor finds that the needle rod of the existing microwave ablation needle has single function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ablation needle tubing, it can the above-mentioned technical problem who mentions of effectual improvement.

An object of the utility model is to provide a microwave ablation needle, including the ablation needle tubing that the aforesaid mentioned to have this ablation needle tubing's whole functions.

An object of the utility model is to provide a microwave ablation therapeutic instrument still, including the above-mentioned microwave ablation needle to have this microwave ablation needle's whole functions.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment provides an ablation needle syringe, the ablation needle syringe has at least two channels isolated from each other, wherein the at least two channels include a first channel and a second channel, a distal end and a proximal end of the first channel respectively penetrate through the distal end and the proximal end of the ablation needle syringe, so that a radio frequency cable passing through the first channel can be electrically connected to a radiation antenna disposed at the distal end of the ablation needle syringe, the first channel is used for accommodating a cooling liquid for cooling the ablation needle syringe, and the distal end and the proximal end of the second channel respectively penetrate through the distal end and the proximal end of the ablation needle syringe, so that a connection cable passing through the second channel can be electrically connected to an auxiliary element disposed at the distal end of the ablation needle syringe.

In an alternative embodiment, the volume of the first channel is greater than the volume of the second channel.

In a second aspect, an embodiment provides a microwave ablation needle, which includes a radiation antenna, a radio frequency cable, and the ablation needle tube in the foregoing embodiment, the radiation antenna is connected to a distal end of the ablation needle tube, the radio frequency cable is disposed in the first channel in a penetrating manner, a distal end of the radio frequency cable is electrically connected to the radiation antenna, and a proximal end of the radio frequency cable is used for being electrically connected to a microwave output device.

In an alternative embodiment, the outer surface of the distal end of the radiating antenna is a curved surface.

In an alternative embodiment, the outer surface of the distal end of the radiating antenna is coated with an anti-stiction developer coating.

In an optional embodiment, the microwave ablation needle further comprises an auxiliary element and a connection cable, the auxiliary element comprises a first temperature sensor, the first temperature sensor is connected with the radiation antenna, the connection cable penetrates through the second channel, and the distal end of the connection cable is electrically connected with the first temperature sensor.

In optional embodiment, the microwave ablation needle still includes the capillary, the capillary is worn to locate in the first passageway, first inlet and first liquid outlet have been seted up respectively to the near-end and the distal end of capillary, the second liquid outlet has been seted up to the near-end of ablation needle tubing, the coolant liquid is used for following first inlet gets into the capillary, the process first liquid outlet gets into the outer wall of capillary with the cavity between the inner wall of ablation needle tubing, and follow the second liquid outlet flows the ablation needle tubing.

In optional embodiment, the microwave ablation needle still includes the exchange casing, the exchange casing with the near-end of ablating the needle tubing is connected, the exchange casing possesses feed liquor cavity and goes out the liquid cavity, the feed liquor cavity with first inlet intercommunication, go out the liquid cavity with second liquid outlet intercommunication.

In optional embodiment, it is close to for the feed liquor cavity to go out the liquid cavity ablation needle tubing, the inside of exchange casing is provided with the baffle, the baffle will the inner chamber of exchange casing is separated for the feed liquor cavity with go out the liquid cavity, be provided with the through-hole on the baffle, the capillary is used for passing go out the liquid cavity with the through-hole, so that first inlet with the feed liquor cavity intercommunication.

In an optional embodiment, the microwave ablation needle further comprises a second temperature sensor, the second temperature sensor is connected with the outer wall of the exchange housing, and the second temperature sensor is used for detecting the temperature of the outer wall corresponding to the liquid outlet chamber.

In an alternative embodiment, the microwave ablation needle further comprises a handle, and portions of the ablation needle cannula and the exchange housing are disposed inside the handle.

In optional embodiment, the microwave ablation needle still includes stock solution bag, drain pipe and feed liquor pipe, be provided with second inlet and third liquid outlet on the stock solution bag, the one end of drain pipe with third liquid outlet intercommunication, the other end of feed liquor pipe with feed liquor cavity intercommunication, the one end of feed liquor pipe with second inlet intercommunication, the other end of drain pipe with go out liquid cavity intercommunication.

In an alternative embodiment, the microwave ablation needle further comprises a pump disposed on the outlet tube to increase kinetic energy of the cooling fluid entering the inlet chamber from the reservoir.

In an optional embodiment, the radio frequency cable includes an inner core, an insulating layer, and a braided spring tube, wherein a proximal end of the inner core is configured to be electrically connected to the microwave output device, the insulating layer is sleeved outside the inner core, and the braided spring tube is sleeved outside the insulating layer.

In an optional embodiment, the microwave ablation needle further includes a radio frequency coaxial connector, one end of the radio frequency coaxial connector is connected to the proximal end of the radio frequency cable, and the other end of the radio frequency coaxial connector is used for being connected to the microwave output device.

In a third aspect, an embodiment provides a microwave ablation therapeutic apparatus, which includes a microwave output device, a control device and the above microwave ablation needle, wherein the microwave output device is electrically connected to the proximal end of the radio frequency cable, and the control device is electrically connected to the microwave output device to change the working state of the microwave output device.

The utility model discloses beneficial effect includes, for example:

the embodiment of the utility model provides an melt needle pipe, first passageway can make the radio frequency cable wear to establish, and the radio frequency cable is used for being connected at the radiation antenna electricity that melts needle pipe distal end with the setting, and the second passageway can make the connecting cable wear to establish, and the connecting cable is used for being connected at the auxiliary component electricity that melts needle pipe distal end with the setting, and auxiliary component can include temperature sensor, pressure sensor, positioner etc.. Therefore, the ablation needle tube not only can enable the radiation antenna to work normally, but also can enable the auxiliary element to work normally, has various functions, and can assist a minimally invasive surgery to be implemented better.

The embodiment of the utility model provides a microwave ablation needle is still provided, including the ablation needle tubing that the aforesaid mentioned, this microwave ablation needle's ablation needle tubing function is various, can assist the implementation better of minimal access surgery.

The embodiment of the utility model provides a microwave ablation therapeutic instrument is still provided, including the microwave ablation needle that the aforesaid mentioned, this microwave ablation therapeutic instrument's ablation needle tubing function is various, can assist the implementation better of minimal access surgery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a microwave ablation needle according to an embodiment of the present invention;

fig. 2 is a block diagram of other components of the control device according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is an enlarged schematic view at B of FIG. 1;

fig. 5 is an enlarged schematic view at C in fig. 1.

Icon: 1-a microwave ablation needle; 11-an ablation needle tube; 111-a first channel; 112-a second channel; 113-a second outlet; 12-a radiating antenna; 13-a radio frequency cable; 131-an inner core; 132-an insulating layer; 133-braiding a spring tube; 14-a first temperature sensor; 15-connecting cables; 16-a capillary tube; 161-a first liquid inlet; 162-a first liquid outlet; 17-an exchange housing; 171-a liquid inlet chamber; 172-liquid outlet chamber; 18-a separator; 19-a second temperature sensor; 20-a handle; 21-liquid storage bag; 211-a second liquid inlet; 212-a third liquid outlet; 22-a liquid outlet pipe; 23-a liquid inlet pipe; 24-a radio frequency coaxial connector; 3-cooling liquid; 4-microwave output device; 5-control device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

Referring to fig. 1 to 4, the present embodiment provides a microwave ablation therapeutic apparatus, which includes a microwave output device 4, a control device 5 and a microwave ablation needle 1, where the microwave ablation needle 1 includes an ablation needle tube 11, a radio frequency cable 13 and a radiation antenna 12, the ablation needle tube 11 has a first channel 111 and a second channel 112 that are isolated from each other, the radio frequency cable 13 is inserted into the first channel 111, the radiation antenna 12 is connected to a distal end of the ablation needle tube 11, a distal end of the radio frequency cable 13 is electrically connected to the radiation antenna 12, a proximal end of the radio frequency cable 13 is electrically connected to the microwave output device 4, and the control device 5 is electrically connected to the microwave output device 4.

It should be noted that, in the whole text, the proximal end of each component refers to the end of the microwave ablation needle 1 close to the medical staff during normal use. The distal end of each component part is the end of the microwave ablation needle 1 that is inserted into a patient during normal use. That is, in the present embodiment, the proximal end of each component part is the right end of each component part in fig. 1, and the distal end of each component part is the left end of each component part in fig. 1, relatively.

In the present embodiment, the radiation antenna 12 is an energy emitter, and the radiation antenna 12 is used for emitting the microwave for ablation. Specifically, the control device 5 controls the microwave output device 4 to output signals, the signals are transmitted to the radiation antenna 12 through the radio frequency cable 13, and the radiation antenna 12 emits microwaves for ablation, so that minimally invasive surgery treatment is implemented.

In this embodiment, the control device 5 can turn on or off the microwave output device 4, and the control device 5 can control the output power of the microwave output device 4 to control the transmitting power of the radiating antenna 12.

Referring to fig. 1-4, in the present embodiment, the microwave ablation needle 1 further includes an auxiliary element and a connection cable 15, the auxiliary element includes a first temperature sensor 14, the first temperature sensor 14 is connected to the radiation antenna 12, the connection cable 15 is disposed through the second channel 112, a distal end of the connection cable 15 is electrically connected to the first temperature sensor 14, and a proximal end of the connection cable 15 is electrically connected to the control device 5.

In the present embodiment, the first temperature sensor 14 is electrically connectable to the control device 5 through a connection cable 15, and the first temperature sensor 14 is configured to detect the temperature of the radiation antenna 12 itself and feed back the detected temperature value to the control device 5 through an electric signal.

It will be appreciated that in actual use, if the temperature of the radiating antenna 12 is too high, burns may be caused to other body tissues of the patient. Therefore, referring to fig. 2, in the present embodiment, if the temperature value represented by the temperature signal received by the control device 5 and output by the first temperature sensor 14 is higher than the first preset value, the control device 5 controls the microwave transmitting device to reduce the power or stop operating, so as to reduce the transmitting power of the radiation antenna 12 or stop operating the radiation antenna 12, and prevent the radiation antenna 12 with too high temperature from burning other body tissues of the patient.

It should be noted that, the staff may pre-store the specific value of the first preset value into the control device 5 according to the actual situation.

Specifically, in the present embodiment, a groove is provided on an outer wall of the radiation antenna 12, and the first temperature sensor 14 is embedded in the groove. In this way, the relative stability between the first temperature sensor 14 and the radiation antenna 12 can be improved, and the first temperature sensor 14 can be effectively prevented from being detached from the radiation antenna 12.

It should be noted that, in other embodiments, the auxiliary element may further include a pressure sensor, a positioning device, and the like, and a cable for electrically connecting the pressure sensor and the positioning device may also be simultaneously inserted into the second channel 112. Of course, in other embodiments, the ablation needle tube 11 may further include a third channel, a fourth channel, and the like, where the first channel 111, the second channel 112, the third channel, and the fourth channel are isolated from each other, and cables for electrically connecting the pressure sensor and the positioning device may also be respectively inserted into the third channel and the fourth channel. That is, the number of channels provided in the ablation needle tube 11 may be three, four, five, etc., and the number of components included in the auxiliary component may be three, four, five, etc.

It will be appreciated that the ablation needle cannula 11 is provided with a plurality of passages which allow a plurality of different cables to pass therethrough, and that the auxiliary components may include a plurality of components for different functions, so that different cables can be electrically connected to different components. Moreover, the plurality of components can achieve different functions, for example: the temperature sensor can detect the temperature of the radiation antenna 12, the pressure sensor can detect the pressure to which the radiation antenna 12 is subjected, the positioning device can feed back the specific position of the radiation antenna 12, and the like. Like this, the function of melting needle tubing 11 is various, and a plurality of components and parts can play the additional effect to the minimal access surgery, can make the minimal access surgery implement better.

Referring to fig. 4, in the present embodiment, the outer surface of the distal end of the radiation antenna 12 is a cambered surface. Thus, not only can the distal end of the radiation antenna 12 be prevented from scratching the endoscope channel, but also the distal end of the radiation antenna 12 can be prevented from stabbing the body tissue of the patient.

It will be appreciated that the distal end of the auxiliary antenna may be shaped as a hemisphere, cone, etc.

In the present embodiment, the distal outer surface of the radiation antenna 12 is coated with a development coating. Thus, medical staff can determine the position of the radiation antenna 12 in the body of the patient through X-ray irradiation, CT scanning and the like, and the operation is convenient to implement.

In this embodiment, the developing coating layer has an anti-sticking function. Thus, the radiation antenna 12 can be separated from the body tissue of the patient more easily, the needle withdrawing process is easier, the damage to the body tissue of the patient is reduced, and the implementation process of the operation can be smoother.

Referring to fig. 3-5, in the present embodiment, the microwave ablation needle 1 further includes a capillary tube 16, the capillary tube 16 is disposed in the first channel 111, a first liquid inlet 161 and a first liquid outlet 162 are respectively formed at a proximal end and a distal end of the capillary tube 16, and a second liquid outlet 113 is formed at a proximal end of the ablation needle tube 11.

The microwave ablation needle 1 further comprises an exchange housing 17, the exchange housing 17 is connected with the proximal end of the ablation needle tube 11, the exchange housing 17 is provided with a liquid inlet chamber 171 and a liquid outlet chamber 172, the liquid inlet chamber 171 is communicated with the first liquid inlet 161, and the liquid outlet chamber 172 is communicated with the second liquid outlet 113.

Specifically, referring to fig. 5, in the present embodiment, the liquid outlet chamber 172 is close to the ablation needle tube 11 relative to the liquid inlet chamber 171, the partition 18 is disposed inside the exchange housing 17, a through hole (not shown) is disposed on the partition 18, and the capillary 16 is used to pass through the liquid outlet chamber 172 and the through hole, so that the first liquid inlet 161 is communicated with the liquid inlet chamber 171.

It will be appreciated that in this embodiment, the cooling liquid 3 in the liquid inlet chamber 171 can enter the capillary tube 16 through the first liquid inlet 161, then flow in the capillary tube 16, and then flow out of the capillary tube 16 from the first liquid outlet 162 to enter the chamber between the outer wall of the capillary tube 16 and the inner wall of the ablation needle tube 11, and then flow out of the ablation needle tube 11 from the second liquid outlet 113 to enter the liquid outlet chamber 172 by changing the flow direction.

It should be noted that, in the present embodiment, the capillary 16 and the radio frequency cable 13 are arranged side by side in the first channel 111, and the radio frequency cable 13 is located in the chamber between the outer wall of the capillary 16 and the inner wall of the ablation needle tube 11. In this way, the cooling liquid 3 not only can cool the ablation needle tube 11 and the radio frequency cable 13 simultaneously, but also can prevent heat from being transferred from the radio frequency cable 13 to the tube wall of the ablation needle tube 11, so that the ablation needle tube 11 with too high temperature can be prevented from burning other body tissues of the patient.

It should be noted that, in the present embodiment, the volume of the first passage 111 is larger than the volume of the second passage 112. In this way, not only can the capillary tube 16 and the radio frequency cable 13 be accommodated in the first channel 111 at the same time, but also more cooling liquid 3 can be accommodated, and the cooling effect is better.

Of course, in other embodiments, the volume of the first channel 111 may be less than or equal to the volume of the second channel 112.

In this embodiment, in order to prevent the convection between the coolant 3 in the liquid inlet chamber 171 and the coolant 3 in the liquid outlet chamber, the capillary tube 16 may be sealed after passing through the through hole. Similarly, in order to prevent the cooling liquid 3 in the ablation needle tube 11 from leaking to the radiation antenna 12, after the rf cable 13 passes through the ablation needle tube 11 and is electrically connected to the radiation antenna 12, the passing portion of the rf cable 13 may be sealed to prevent the cooling liquid 3 from leaking to the radiation antenna 12.

Referring to fig. 1 and 5, in this embodiment, the microwave ablation needle 1 further includes a liquid storage bag 21, a liquid outlet pipe 22 and a liquid inlet pipe 23, the liquid storage bag 21 is provided with a second liquid inlet 211 and a third liquid outlet 212, one end of the liquid outlet pipe 22 is communicated with the third liquid outlet 212, the other end of the liquid inlet pipe 23 is communicated with the liquid inlet chamber 171, one end of the liquid inlet pipe 23 is communicated with the second liquid inlet 211, and the other end of the liquid outlet pipe 22 is communicated with the liquid outlet chamber 172.

In this way, the cooling liquid 3 in the liquid storage bag 21 enters the liquid inlet chamber 171 from the third liquid outlet 212 through the liquid outlet pipe 22, then flows out of the ablation needle tube 11 after passing through the capillary tube 16 and the ablation needle tube 11, enters the liquid outlet chamber 172, and then re-enters the liquid storage bag 21 through the liquid inlet pipe 23, so that the whole cooling cycle is completed, and the ablation needle tube 11 and the radio frequency cable 13 can be cooled at any time.

In the present embodiment, the coolant 3 contains a thermochromic material, and the coolant 3 changes its color automatically according to the temperature change of itself, and when the temperature of itself returns to the initial temperature, the color of the coolant 3 also automatically returns to its original color. The cooling liquid 3 should be stored at 0 deg.C or below. When the temperature of coolant liquid 3 is higher than preset temperature value, the colour of coolant liquid 3 will become red, like this, when the coolant liquid in stock solution bag 21 becomes red, can indicate the staff to change cryogenic coolant liquid 3, carry out circulative cooling once more.

It should be noted that, in this embodiment, the microwave ablation needle 1 further includes a pump (not shown in the figure) disposed on the liquid outlet pipe 22, and the pump is used for increasing the kinetic energy of the cooling liquid 3 entering the liquid inlet chamber 171 from the liquid storage bag 21.

Referring to fig. 5, in the present embodiment, the microwave ablation needle 1 further includes a second temperature sensor 19, the second temperature sensor 19 is connected to the outer wall of the exchange housing 17, and the second temperature sensor 19 is used for detecting the temperature of the outer wall corresponding to the liquid outlet chamber 172.

It can be understood that in the present embodiment, the cooling liquid 3 outputted from the second liquid outlet 113 takes away heat from the radio frequency cable 13 and the ablation needle tube 11, the temperature of the cooling liquid 3 itself will increase, and the temperature of the outer wall corresponding to the liquid outlet chamber 172 will increase after the cooling liquid 3 enters the liquid outlet chamber 172. Therefore, the second temperature sensor 19 can detect the temperature change of the cooling liquid 3 by detecting the temperature of the outer wall corresponding to the liquid outlet chamber 172, thereby reminding the operator to replace the cooling liquid 3 in time.

Specifically, referring to fig. 2 and 5, in the present embodiment, the second temperature sensor 19 is also electrically connected to the control device 5. If the temperature value represented by the temperature signal output by the second temperature sensor 19 and received by the control device 5 exceeds the second preset value, the control device 5 controls the microwave transmitting device to reduce power or stop working, so that the transmitting power of the radiation antenna 12 is reduced or the radiation antenna 12 stops working, and at this time, the cooling liquid 3 can be replaced by a worker.

Referring to fig. 1 and 5, in the present embodiment, the microwave ablation needle 1 further includes a handle 20, and the parts of the ablation needle tube 11 and the exchange housing 17 are disposed inside the handle 20. In this way, the handle 20 not only facilitates the holding of the medical staff, but also protects the ablation needle tube 11 and the exchange housing 17.

In the embodiment, the ablation needle tube 11 extends from the handle 20 to the radiation antenna 12, and the ablation needle tube 11 may be made of PEEK (poly ether ketone) or PI (polyimide) composite material, which has good flexibility and good bending performance.

Correspondingly, referring to fig. 3, in the present embodiment, the rf cable 13 includes an inner core 131, an insulating layer 132 and a braided spring tube 133, a proximal end of the inner core 131 is electrically connected to the microwave output device 4, the insulating layer 132 is sleeved outside the inner core 131, and the braided spring tube 133 is sleeved outside the insulating layer 132. Thus, the braided spring tube 133 can protect the inner core 131, and the braided spring tube 133 can effectively enhance the bending performance and the self-restoring performance, and can prevent the inner core 131 from being broken.

Correspondingly, in the present embodiment, the capillary 16 is made of a silicone material, which has good bending performance and recovery performance.

Referring to fig. 1 and 5, in the present embodiment, the microwave ablation needle 1 further includes a radio frequency coaxial connector 24, the radio frequency coaxial connector 24 is connected to the exchange housing 17, and the radio frequency coaxial connector 24 is located at the distal end of the exchange housing 17, one end of the radio frequency coaxial connector 24 is connected to the proximal end of the radio frequency cable 13, and the other end of the radio frequency coaxial connector 24 is used for connecting to the microwave output device 4. Thus, the rf coaxial connector 24 can improve the stability of the signal transmission from the microwave output device 4 to the rf cable 13.

In summary, the working principle of the microwave ablation needle 1 provided by the present embodiment is as follows:

the cooling liquid 3 enters the liquid outlet pipe 22 from the third liquid outlet 212 of the liquid storage bag 21, passes through the liquid outlet pipe 22, enters the liquid inlet chamber 171, then enters the capillary 16 through the first liquid inlet 161, flows out of the capillary 16 from the first liquid outlet 162, enters the chamber between the outer wall of the capillary 16 and the inner wall of the ablation needle tube 11, flows out of the ablation needle tube 11 from the second liquid outlet 113, enters the liquid outlet chamber 172, passes through the liquid inlet pipe 23, and reenters the liquid storage bag 21 from the second liquid inlet 211, thereby completing the cooling cycle. During the circulation of the cooling liquid 3, the ablation needle tube 11 and the radio frequency cable 13 in the first channel 111 can be cooled.

In addition, the connection cable 15 can be electrically connected to the first temperature sensor 14 through the second passage 112, and the first temperature sensor 14 is configured to detect the temperature of the radiation antenna 12 and transmit a detected temperature signal to the control device 5. If the temperature value represented by the temperature signal received by the control device 5 is greater than the first preset value, the microwave output device 4 is controlled to reduce the power or stop working, so that the transmitting power of the radiation antenna 12 is reduced or the radiation antenna 12 stops working.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. The utility model provides an ablation needle tube, its characterized in that, ablation needle tube possesses two at least passageways that keep apart each other, wherein, two at least passageways include first passageway and second passageway, the distal end and the near-end of first passageway run through respectively in the distal end and the near-end of ablation needle tube to make pass through the radio frequency cable of first passageway can with set up in the radiation antenna electricity of the distal end of ablation needle tube is connected, first passageway is used for holding the cooling liquid that cools the ablation needle tube, the distal end and the near-end of second passageway run through respectively in the distal end and the near-end of ablation needle tube, so that pass through the connecting cable of second passageway can with set up in the auxiliary component electricity of the distal end of ablation needle tube is connected.

2. The ablation needle cannula of claim 1, wherein the volume of the first passageway is greater than the volume of the second passageway.

3. A microwave ablation needle is characterized by comprising a radiation antenna, a radio frequency cable and the ablation needle tube of claim 1 or 2, wherein the radiation antenna is connected with the far end of the ablation needle tube, the radio frequency cable is arranged in the first channel in a penetrating mode, the far end of the radio frequency cable is electrically connected with the radiation antenna, and the near end of the radio frequency cable is used for being electrically connected with a microwave output device.

4. A microwave ablation needle according to claim 3, wherein the outer surface of the distal end of the radiating antenna is a curved surface.

5. A microwave ablation needle according to claim 3, wherein an outer surface of the distal end of the radiation antenna is coated with an anti-stiction developable coating.

6. A microwave ablation needle according to claim 3, further comprising an auxiliary element including a first temperature sensor connected to the radiating antenna and a connection cable extending through the second passage and having a distal end electrically connected to the first temperature sensor.

7. The microwave ablation needle according to claim 3, further comprising a capillary tube, wherein the capillary tube is disposed in the first channel in a penetrating manner, a first liquid inlet and a first liquid outlet are respectively formed at a proximal end and a distal end of the capillary tube, a second liquid outlet is formed at a proximal end of the ablation needle tube, and the cooling liquid is used for entering the capillary tube from the first liquid inlet, entering a cavity between an outer wall of the capillary tube and an inner wall of the ablation needle tube through the first liquid outlet, and flowing out of the ablation needle tube from the second liquid outlet.

8. The microwave ablation needle according to claim 7, further comprising a switching housing connected to the proximal end of the needle tube, the switching housing having a fluid inlet chamber in communication with the first fluid inlet and a fluid outlet chamber in communication with the second fluid outlet.

9. The microwave ablation needle according to claim 8, wherein the liquid outlet chamber is close to the ablation needle tube relative to the liquid inlet chamber, a partition board is arranged inside the exchange housing, the partition board divides the inner cavity of the exchange housing into the liquid inlet chamber and the liquid outlet chamber, a through hole is arranged on the partition board, and the capillary tube is used for penetrating through the liquid outlet chamber and the through hole so as to communicate the first liquid inlet with the liquid inlet chamber.

10. A microwave ablation needle according to claim 8, further comprising a second temperature sensor connected to an outer wall of the exchange housing, the second temperature sensor being configured to detect a temperature of the outer wall corresponding to the exit liquid chamber.

11. A microwave ablation needle according to claim 8, further comprising a handle, portions of the ablation needle cannula and the exchange housing being disposed inside the handle.

12. A microwave ablation needle according to claim 8, further comprising a liquid storage bag, a liquid outlet pipe and a liquid inlet pipe, wherein a second liquid inlet and a third liquid outlet are arranged on the liquid storage bag, one end of the liquid outlet pipe is communicated with the third liquid outlet, the other end of the liquid inlet pipe is communicated with the liquid inlet chamber, one end of the liquid inlet pipe is communicated with the second liquid inlet, and the other end of the liquid outlet pipe is communicated with the liquid outlet chamber.

13. A microwave ablation needle according to claim 12, further comprising a pump disposed on the outlet tube to increase kinetic energy of the cooling fluid entering the inlet chamber from the reservoir.

14. A microwave ablation needle according to claim 12, wherein the cooling fluid is stored in the fluid storage bag, and the cooling fluid contains a photosensitive material therein, and the cooling fluid is configured to change color when the temperature of the cooling fluid is higher than a preset temperature value.

15. A microwave ablation needle according to any one of claims 3 to 14, wherein the radio frequency cable includes an inner core, an insulating layer and a braided spring tube, the proximal end of the inner core is adapted to be electrically connected to the microwave output device, the insulating layer is disposed over the inner core, and the braided spring tube is disposed over the insulating layer.

16. A microwave ablation needle according to any one of claims 3 to 14, further comprising a radio frequency coaxial connector, one end of the radio frequency coaxial connector being connected to the proximal end of the radio frequency cable, the other end of the radio frequency coaxial connector being adapted to be connected to the microwave output device.

17. A microwave ablation treatment apparatus comprising a microwave output device, a control device and the microwave ablation needle of any one of claims 3 to 16, wherein the microwave output device is electrically connected to the proximal end of the radio frequency cable, and the control device is electrically connected to the microwave output device to change the working state of the microwave output device.

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