CN210228306U

CN210228306U - Microwave ablation device

Info

Publication number: CN210228306U
Application number: CN201920819460.5U
Authority: CN
Inventors: Yonggang Wang; 王永刚; Ronghua Jiang; 江荣华; Xiaohuan Yang; 杨小唤; Long Long; 隆龙
Original assignee: Nanjing Kangyou Medical Science & Technology Co ltd
Current assignee: Nanjing Kangyou Medical Science & Technology Co ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-04-03
Anticipated expiration: 2029-05-31

Abstract

The utility model provides a microwave ablation device relates to medical instrument technical field, and microwave ablation device includes: the radio frequency cable comprises an embedded pipe and a radio frequency cable, wherein the embedded pipe comprises a head end and a tail end, the head end and the tail end of the embedded pipe are correspondingly provided with a first opening and a second opening, and a guide wire channel for communicating the first opening and the second opening is arranged in the embedded pipe; still be provided with the cable in the built-in and hold the chamber, the radio frequency cable is installed and is held the intracavity at the cable, and the microwave transmitting terminal of radio frequency cable is located the head end. A connecting channel between the affected part of the patient and the outside can be established by means of puncture and the like, and a guide wire is placed into the connecting channel; the outer end of the guide wire penetrates into the guide wire channel of the microwave ablation device provided by the utility model from the first opening, the implantation tube can gradually extend into the body of a patient under the guidance of the guide wire, and finally the head end of the implantation tube is moved to the patient; then, the microwave ablation instrument is started to perform microwave ablation on the focus through the radio frequency cable.

Description

Microwave ablation device

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a microwave ablation device is related to.

Background

Malignant biliary obstruction disease refers to malignant tumor of biliary system and metastatic tumor such as liver cancer, pancreatic cancer, gastric cancer, colon cancer, etc. which invade bile duct to cause malignant obstructive jaundice, resulting in stenosis or obstruction of different parts of extrahepatic bile duct. At present, surgical resection is still the only radical treatment method for biliary tract tumors, but because biliary tract obstructive diseases have occult diseases and progress rapidly, the number of patients with surgical resection opportunities is less than 30%. Biliary drainage and biliary stent placement have become the first choice methods for non-surgical treatment of malignant obstructive jaundice, and how to actively control tumor growth while placing a stent, especially tumor growth in the lumen of the stent and at both ends of the stent, becomes the key to prolong the stent patency time.

As an emerging treatment method, the microwave ablation treatment method has been widely applied to solid tumors such as liver and thyroid, and plays an increasingly important role in controlling tumor development and prolonging the life of patients, but the application of the microwave ablation technology to the treatment of malignant biliary tract obstructive diseases still belongs to the emerging field. The microwave tumor ablation is to utilize microwave energy to act on tissues to generate heat effect, the central temperature of a thermal field can reach more than 100 ℃ within several minutes to tens of minutes, and tumor tissues are coagulated and inactivated at instant high temperature to achieve the purpose of tumor ablation treatment.

The existing microwave ablation device comprises a radio frequency cable and a transmitting head fixedly connected to one end of the radio frequency cable; the other end of one end of the radio frequency cable is connected with a coaxial radio frequency connector. When the existing microwave ablation device is used, the process of placing the microwave reflecting head into the body of a patient is difficult due to the unreasonable structural design of the existing microwave ablation device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a microwave ablation device to the technical problem of microwave ablation device built-in internal difficulty among the prior art has been alleviated.

The utility model provides a pair of microwave ablation device, include: the radio frequency cable comprises an embedded pipe and a radio frequency cable, wherein the embedded pipe comprises a head end and a tail end, the head end and the tail end of the embedded pipe are correspondingly provided with a first opening and a second opening, and a guide wire channel communicated with the first opening and the second opening is arranged in the embedded pipe;

still be provided with the cable in the built-in pipe and hold the chamber, the radio frequency cable is installed the cable holds the intracavity, just the microwave transmitting terminal of radio frequency cable is located the head end.

Furthermore, a fixed jack is axially arranged on the inner wall of the cable accommodating cavity close to the head end, and the microwave transmitting end of the radio frequency cable is inserted into the fixed jack.

Furthermore, a limiting sleeve connected with the inner wall of the cable accommodating cavity is arranged in the cable accommodating cavity, the limiting sleeve is sleeved outside the radio frequency cable, and the limiting sleeve is used for preventing the radio frequency cable from shaking along the radial direction.

Further, the inserting tube comprises a needle head and a tube body, and the needle head is connected with the tube body;

the needle head is provided with a first channel, the end surface of the needle head facing the tube body is provided with an insertion part extending towards the tube body, and the insertion part is recessed towards the end surface of the tube body towards the direction of the needle head to form the fixed insertion hole;

a second channel and a third channel are arranged in the tube body, and the second channel is aligned and communicated with the first channel to form the guide wire channel; the plug part is plugged in the third channel;

the limiting sleeve is connected with the end face, facing the tube body, of the needle head and sleeved outside the insertion part, and the length of the limiting sleeve is larger than that of the insertion part.

Further, the material of body is flexible material to make the body flexible.

Furthermore, the microwave ablation device further comprises a cooling mechanism, wherein the cooling mechanism is connected with the cable accommodating cavity and used for cooling the radio frequency cable in the cable accommodating cavity.

Further, the cooling mechanism comprises a liquid collecting cavity and a cooling liquid guide pipe, the cable accommodating cavity comprises a third opening far away from the head end, and the third opening is communicated with the liquid collecting cavity;

the cooling liquid guide pipe is arranged in the cable accommodating cavity and is used for injecting cooling liquid into the cable accommodating cavity; and a liquid discharge hole is formed in the liquid collection cavity.

Furthermore, a liquid outlet hole is formed in the side wall of the cooling liquid guide pipe.

Further, the microwave ablation device comprises a handle, the cooling mechanism is located in the handle, a liquid inlet connector and a liquid outlet connector are arranged on the handle, the liquid inlet connector is connected with the other end of the cooling liquid guide pipe, and the liquid outlet connector is connected with a liquid discharge hole in the liquid collection cavity.

Further, the microwave ablation device comprises a liquid medicine injection joint connected with the second opening of the guide wire channel.

The utility model provides a microwave ablation device includes: the microwave energy transmitting device comprises an embedded pipe and a radio frequency cable, wherein the transmitting end of the radio frequency cable can continuously transmit microwave energy. The implantation tube comprises a head end and a tail end, the head end of the implantation tube can be inserted into the body of a patient, the head end and the tail end of the implantation tube are correspondingly provided with a first opening and a second opening, and a guide wire channel for communicating the first opening and the second opening is arranged in the implantation tube; still be provided with the cable in the built-in pipe and hold the chamber, the radio frequency cable is installed the cable holds the intracavity, just the microwave transmitting terminal of radio frequency cable is located the head end. When the microwave ablation device provided by the utility model is used, a connecting channel between the affected part of a patient and the outside can be established by means of puncture and the like, and a guide wire is placed in the connecting channel; the outer end of the guide wire penetrates into the guide wire channel of the microwave ablation device provided by the utility model from the first opening, the implantation tube can gradually extend into the body of a patient under the guidance of the guide wire, and finally the head end of the implantation tube is moved to the patient; then, the microwave ablation instrument is started to perform microwave ablation on the focus through the radio frequency cable.

Compared with the prior art, the utility model provides a microwave ablation device can utilize the guide effect of seal wire, and smooth microwave emission end with the radio frequency cable arouses patient's tumour position, and whole operation process is simple, has reduced the operation degree of difficulty of operation.

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 cross-sectional view of a microwave ablation device in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the portion A of FIG. 1;

fig. 3 is a schematic view of a needle of a microwave ablation device according to an embodiment of the present invention;

fig. 4 is a partial schematic view of an end surface of a tube body of a microwave ablation device according to an embodiment of the present invention;

fig. 5 is a bottom view of a microwave ablation device in accordance with an embodiment of the present invention;

fig. 6 is a cross-sectional view taken at the position B-B in fig. 5.

Icon: 100-placing a tube; 110-a guide wire channel; 120-a first opening; 130-a second opening; 140-a cable receiving cavity; 141-a third opening; 150-needle head; 151-a plug-in part; 1511-fixed jack; 152-a limit sleeve; 153-a first channel; 160-a tube body; 161-a second channel; 162-a third channel; 200-a radio frequency cable; 210-a microwave transmitting end; 220-radio frequency cable connector; 300-a handle; 310-a liquid collection cavity; 311-drain holes; 320-cooling liquid guide pipe; 321-liquid outlet holes; 330-liquid inlet joint; 340-liquid outlet joint; 400-luer fitting assembly.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that 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.

As shown in fig. 1-5, the present invention provides a microwave ablation device including: insertion tube 100 and rf cable 200, microwave emitting end 210 of rf cable 200 is capable of continuously emitting microwave energy. The implantation tube 100 comprises a head end and a tail end, the head end of the implantation tube 100 can be inserted into the body of a patient, the head end and the tail end of the implantation tube 100 are correspondingly provided with a first opening 120 and a second opening 130, and a guide wire channel 110 which is communicated with the first opening 120 and the second opening 130 is arranged in the implantation tube 100. The imbedding tube 100 is further provided with a cable accommodating cavity 140, the rf cable 200 is installed in the cable accommodating cavity 140, and the microwave transmitting end 210 of the rf cable 200 is located at the head end.

When the microwave ablation device provided by the utility model is used, a connecting channel between the affected part of a patient and the outside can be established by means of puncture and the like, and a guide wire is placed in the connecting channel; the outer end of the guide wire penetrates into the guide wire channel 110 of the microwave ablation device provided by the utility model from the first opening 120, the implantation tube 100 can gradually extend into the body of the patient under the guidance of the guide wire, and finally the head end of the implantation tube 100 is moved to the position of the patient; then, the microwave ablation instrument is started to perform microwave ablation on the focus through the radio frequency cable 200.

The total length of the implantation tube 100 can be 1700-1900mm, which meets the requirements of most operations and can be implanted into the biliary tract by Endoscopic Retrograde Cholangiopancreatography (ERCP).

The rf cable 200 is a transmission carrier of microwave energy, and a flexible rf cable 200 with a wire diameter of 0.6mm and a minimum bending radius of 12mm may be used.

A fixed jack 1511 is axially arranged on the inner wall of the cable accommodating cavity 140 close to the head end, and the microwave transmitting end 210 of the radio frequency cable 200 is inserted into the fixed jack 1511. The fixing insertion hole 1511 extends in an axial direction, and an inner diameter of the fixing insertion hole 1511 is sized to correspond to an outer diameter of the microwave transmitting end 210 of the rf cable 200. When the device is assembled, the microwave transmitting end 210 can be clamped in the fixed jack 1511.

In order to reduce the damage of the inner conductor of the radio frequency cable 200 caused by the relative shaking amplitude of the radio frequency cable 200 and the insertion tube 100, a limiting sleeve 152 connected with the inner wall of the cable accommodating cavity 140 is arranged in the cable accommodating cavity, the inner diameter of the limiting sleeve 152 corresponds to the outer diameter of the radio frequency cable 200, the limiting sleeve 152 is sleeved outside the radio frequency cable 200, and the limiting sleeve 152 is used for preventing the radio frequency cable 200 from shaking along the radial direction.

Through the double fixing mode of the fixing insertion hole 1511 and the limiting sleeve 152, the radio frequency cable 200 is fixed with the tube body 160 of the insertion tube 100, and the probability that the radio frequency cable 200 shakes relative to the insertion tube 100 after long-term use is reduced.

Further, a sealant (shown by a dashed box in fig. 2) is filled between the inner wall of the cable accommodating cavity 140 near the head end and the stop sleeve 152, so that the microwave transmitting end 210 of the rf cable 200 is sealed. The sealant can be high-temperature medical glue, and the connection firmness of the radio frequency cable 200 and the embedded pipe 100 is improved.

The insertion tube 100 may be integrally formed or may be formed by being assembled after being separately processed, specifically, as shown in fig. 2 to 4, the insertion tube 100 includes a needle 150 and a tube 160, and the needle 150 is connected to the tube 160. The needle 150 is provided with a first channel 153, the end surface of the needle 150 facing the tube 160 is provided with an insertion part 151 extending towards the tube 160, the end surface of the insertion part 151 facing the tube 160 is recessed towards the needle 150 to form the fixing insertion hole 1511, and the tube 160 is provided with a second channel 161 and a third channel 162.

When the needle 150 and the tube 160 are connected, the second channel 161 is aligned with and communicates with the first channel 153 to form the guide wire channel 110. The insertion part 151 is inserted into the third channel 162.

The limiting sleeve 152 is connected with the end face of the needle 150 facing the tube 160 and sleeved outside the insertion part 151, and the length of the limiting sleeve 152 is greater than that of the insertion part 151, so that the radio frequency cable 200 can be fixedly sleeved.

The maximum outer diameter of the needle head 150 can be designed to be 2.8mm, the needle head is made of a medical metal material 304 stainless steel, the needle head is designed to be a conical pointed end, the outer surface is processed by a developing process, and an anti-sticking coating is sprayed on the outer surface. The first channel 153 has a pore size of between 0.3 and 1.5 mm.

The outer diameter of the tube 160 may be 2.8mm, the bore diameter of the second channel 161 may be 0.8mm, and may pass through a 0.025in guide wire, and the inner diameter of the third channel 162 may be 1.6 mm. The material of the tube 160 may be high temperature resistant medical plastic PTFE (polytetrafluoroethylene). The minimum bending radius of the tube 160 may be 12mm, and the pressure resistance of the first channel 153 and the second channel 161 may be up to 20N.

The outer wall of the tube 160 is marked with scales, which is convenient for the user to control the depth of the body.

As shown in fig. 1 and 5, the cooling mechanism of the microwave ablation device is connected to the cable accommodating cavity 140 for cooling the rf cable 200 in the cable accommodating cavity 140. The temperature of the radio frequency cable 200 is effectively controlled, after operation, the stenosis or obstruction of the biliary tract can be obviously dredged, the tumor load is lightened, the tumor progress is controlled, the unobstructed time of Metal Stents (SEMs) in the biliary tract and the survival time of a patient are prolonged, and the method is safe, feasible and effective in the aspect of treating the cholangiocarcinoma.

Specifically, as shown in fig. 6, the cooling mechanism includes a liquid collecting chamber 310 and a cooling liquid guiding pipe 320, the cable accommodating chamber 140 includes a third opening 141 far from the head end, and the third opening 141 is communicated with the liquid collecting chamber 310. The cooling liquid guide tube 320 is installed in the cable accommodating cavity 140, and one end of the cooling liquid guide tube 320 is located in the cable accommodating cavity 140 and is used for injecting cooling liquid into the cable accommodating cavity 140; the liquid collecting cavity 310 is provided with a liquid discharging hole 311. The cooling liquid is input from the outer end of the cooling liquid guide pipe 320, then enters the cable accommodating cavity 140 after being conducted through the cooling liquid guide pipe 320, absorbs the heat of the radio frequency cable 200, is discharged from the third opening 141, enters the liquid collecting cavity 310, and finally is discharged from the liquid discharge hole 311 of the liquid collecting cavity 310.

A cooling liquid circulating mechanism can be arranged outside the microwave ablation device, so that the cooling liquid in the microwave ablation device can flow circularly.

The side wall of the cooling liquid guide pipe 320 is provided with liquid outlet holes 321. And the number of the liquid outlet holes 321 is plural. In order to reduce the diameter of the insertion tube 100 as much as possible, the inner diameter of the cable accommodating chamber 140 is small, and the cooling fluid guide tube 320 may be squeezed during installation, so that the liquid outlet holes 321 formed in the side wall thereof can effectively reduce the probability of blockage of the liquid outlet holes 321.

The diameter of the cooling liquid guide pipe 320 can be 0.6mm, and medical silica gel is adopted for extrusion molding.

The microwave ablation device comprises a water storage tank, wherein the water storage tank forms a liquid collecting cavity 310, the water storage tank can be made of medical metal, the third channel 162 of the imbedding pipe 100 can be installed on the water storage tank through an adhesive process, and in addition, a water pipe connector and a radio frequency cable connector 220 are further installed on the water storage tank.

The microwave ablation device comprises a handle 300, the cooling mechanism is located in the handle 300, a liquid inlet connector 330 and a liquid outlet connector 340 are arranged on the handle 300, the liquid inlet connector 330 is connected with the other end of the cooling liquid guide pipe 320, and the liquid outlet connector 340 is connected with a liquid discharge hole 311 on the liquid collection cavity 310.

The handle 300 is wrapped outside the water storage tank, is convenient to grasp when in use and can be formed by injection molding of medical plastic ABS.

The microwave ablation device includes a medical fluid injection fitting for connection with the second opening 130 of the guide wire channel 110.

Specifically, the liquid medicine injection connector may be a luer connector assembly 400, the luer connector assembly 400 is connected to one end of the guide wire channel 110 far away from the needle 150, an inner cavity of the luer connector assembly 400 is communicated with the guide wire channel 110, the liquid medicine injection connector may be connected to the luer connector assembly 400 through a syringe or other equipment in a clinical operation, physiological saline, local anesthetic, contrast agent and the like are injected to a lesion part through the guide wire channel 110 of the insertion tube 100 and the first channel 153 of the needle 150, so that the effects of reducing friction between the guide wire and the guide wire channel 110, relieving pain of a patient and enhancing visualization are achieved, meanwhile, preoperative suction can be performed on cyst fluid in the lesion, and the operation curative effect is improved.

The distance from the distal end (the end close to the needle 150) of the cooling liquid guide tube 320 to the rear end face of the needle 150 is less than 15 mm.

The third channel 162 can be communicated and sealed with the water storage tank through welding, crimping, adhering and other processes, and the second channel 161 of the pipe body 160 extends to the outside of the water storage tank.

The lumen of the luer fitting assembly 400 is in communication with the guidewire channel 110.

The utility model provides a microwave ablation device can realize through the ERCP route, the operating procedure as follows:

after successful intubation of the ERCP bile duct, the tumor part, the lesion degree and the lesion length are determined by radiography;

2. cutting the middle of the papillary sphincter conventionally, and dilating the bile duct stenosis part by using a dilation tube;

3. under the guide of the guide wire, the microwave ablation device of the utility model is put in, so that the needle head 150 is positioned at the position (obstruction position) of the tumor for microwave ablation;

4. after ablation, the bracket is placed for drainage, so as to achieve the purpose of dredging the biliary tract for a long time.

The utility model provides a microwave ablation device can also realize through the PTC approach, and the operating procedure is as follows:

1. puncture into the intrahepatic bile duct under the guidance of medical images (B ultrasonic, etc.) by using a puncture needle, and confirm that the puncture needle is positioned in the bile duct by withdrawing the needle core and observing bile outflow or injecting diluted contrast medium, etc.;

2. a guide wire is put in and the puncture needle is withdrawn, and the obstruction part of the biliary tract, the pathological change degree and the pathological change length are displayed through expanding tube line PTC radiography;

3. the microwave ablation device of the utility model is guided by the guide wire, so that the needle head 150 is positioned at the position (obstruction position) of the tumor for microwave ablation;

Besides the above functions, the utility model provides a microwave ablation device can also be used for the microwave ablation treatment of cases such as malignant stenosis of esophagus, bronchial tumor, etc., and the treatment is minimal invasive, safe and effective.

Compared with the prior art, the utility model provides a microwave ablation device can utilize the guide effect of seal wire, and smooth with the microwave transmitting terminal 210 of radio frequency cable 200 arouse patient's tumour position, whole operation process is simple, has reduced the operation degree of difficulty of operation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A microwave ablation device, comprising: the radio frequency cable comprises an embedded pipe and a radio frequency cable, wherein the embedded pipe comprises a head end and a tail end, the head end and the tail end of the embedded pipe are correspondingly provided with a first opening and a second opening, and a guide wire channel communicated with the first opening and the second opening is arranged in the embedded pipe;

2. A microwave ablation device according to claim 1, wherein a fixed jack is axially arranged on the inner wall of the cable accommodating cavity close to the head end, and the microwave transmitting end of the radio frequency cable is inserted into the fixed jack.

3. A microwave ablation device according to claim 2, wherein a limiting sleeve connected with the inner wall of the cable accommodating cavity is arranged in the cable accommodating cavity, the limiting sleeve is sleeved outside the radio frequency cable, and the limiting sleeve is used for preventing the radio frequency cable from shaking along the radial direction.

4. A microwave ablation device according to claim 3 wherein the insertion tube includes a needle and a tube, the needle being connected to the tube;

5. A microwave ablation device according to claim 4 wherein the body is formed of a flexible material to allow the insertion tube to be bent.

6. A microwave ablation device according to claim 1 further including a cooling mechanism connected to the cable receiving cavity for cooling the radio frequency cable within the cable receiving cavity.

7. A microwave ablation device according to claim 6 wherein the cooling mechanism includes a liquid collection chamber and a coolant flow conduit, the cable receiving chamber including a third opening remote from the head end, the third opening communicating with the liquid collection chamber;

8. A microwave ablation device according to claim 7 wherein the side wall of the cooling fluid flow guide tube is provided with liquid outlet holes.

9. A microwave ablation device according to claim 7, wherein the microwave ablation device comprises a handle, the cooling mechanism is located in the handle, a liquid inlet connector and a liquid outlet connector are arranged on the handle, the liquid inlet connector is connected with the other end of the cooling liquid guide pipe, and the liquid outlet connector is connected with a liquid discharge hole in the liquid collection cavity.

10. A microwave ablation device according to any one of claims 1 to 9 including a medical fluid injection fitting for connection with the second opening of the guide wire channel.