CN113397696A - Ablation needle - Google Patents
Ablation needle Download PDFInfo
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- CN113397696A CN113397696A CN202110723565.2A CN202110723565A CN113397696A CN 113397696 A CN113397696 A CN 113397696A CN 202110723565 A CN202110723565 A CN 202110723565A CN 113397696 A CN113397696 A CN 113397696A
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- 238000002679 ablation Methods 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000110 cooling liquid Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 53
- 230000037431 insertion Effects 0.000 claims description 53
- 230000007704 transition Effects 0.000 claims description 9
- 239000000565 sealant Substances 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 18
- 238000012544 monitoring process Methods 0.000 description 6
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- 239000003795 chemical substances by application Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
- A61B2018/00815—Temperature measured by a thermistor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
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- Health & Medical Sciences (AREA)
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- Heart & Thoracic Surgery (AREA)
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Abstract
The utility model provides an ablation needle, relates to medical instrument technical field, is provided with the inserting groove including play water tank and plug connector on the play water tank, and the plug connector is used for holding thermistor, and the plug connector can dismantle fixedly in inserting the inserting groove to make thermistor immerse under the liquid level of play water tank cooling liquid. The ablation needle can improve the accuracy of intraoperative temperature detection.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an ablation needle.
Background
In the microwave ablation tumor treatment, microwaves are transmitted into tumor tissues through an ablation needle, so that the molecular motion is intensified to generate heat, and the cell nucleus and chromatin are coagulated by a thermal coagulation group, and the cell death is induced by protein coagulation and cell chromosome aberration. During the treatment process, the ablation temperature is ensured not to damage normal tissues while killing tumor cells, so that how to accurately monitor the temperature in the operation becomes the key of success or failure of the operation.
The traditional intraoperative temperature monitoring mode is matched with a microwave ablation instrument, a thermistor is fixedly arranged at the top of a water outlet tank, and the temperature of cooling water in the water tank is monitored in real time, so that the intraoperative temperature monitoring requirement is met. However, the traditional temperature monitoring method has obvious disadvantages: because the ablation needle is a disposable medical product and needs to be disinfected, recycled and harmlessly treated uniformly after being used, when different ablation needles are used, the temperature detection result measured by the thermistor of each ablation needle has inevitable deviation due to the fact that the thermistors in different ablation needles are different and the resistance values of different thermistors are different, and the accuracy of temperature monitoring in surgery is seriously influenced.
Disclosure of Invention
The invention aims to provide an ablation needle which can improve the accuracy of intraoperative temperature detection.
The embodiment of the invention is realized by the following steps:
the embodiment of the invention provides an ablation needle, which comprises a water outlet tank and a plug connector, wherein the water outlet tank is provided with a plug-in connection groove, the plug connector is used for accommodating a thermistor, and the plug connector is inserted into the plug-in connection groove and can be detachably fixed, so that the thermistor is immersed under the liquid level of cooling liquid in the water outlet tank. The ablation needle can improve the accuracy of intraoperative temperature detection.
Optionally, the plug connector has a first end and a second end opposite to each other, the first end of the plug connector penetrates through the plug groove and is immersed below the liquid level of the cooling liquid in the water outlet tank, and the plug connector is detachably fixed to the plug groove through the second end.
Optionally, a first thread is arranged on the second end of the plug connector, a second thread is arranged on the inner wall surface of the insertion groove, and the plug connector is in threaded connection with the insertion groove.
Optionally, the outer diameter of the first end portion is smaller than the inner diameter of the insertion groove, the outer diameter of the second end portion is larger than the inner diameter of the insertion groove, and the plug connector is in interference fit with the insertion groove.
Optionally, a side of the second end portion, which is away from the first end portion, is provided with a recess, and a sealant layer is filled between the recess and the insertion groove.
Optionally, the encapsulant layer is a solder layer.
Optionally, the ablation needle further comprises an outer tube, an inner tube, a coaxial cable, a needle head, a water inlet tank, a water inlet pipe, a water outlet pipe, a supply device and a negative pressure device, wherein the coaxial cable is arranged in the inner tube, the end part of the coaxial cable extends out of the inner tube, the inner tube is arranged in the outer tube, the end part of the inner tube extends out of the outer tube, a first gap formed between the coaxial cable and the inner tube at intervals is used as a first channel, a second gap formed between the inner tube and the outer tube at intervals is used as a second channel, the first channel is communicated with the second channel, the needle head extends into the outer tube to be fixed and is connected with the coaxial cable, the water inlet tank is fixedly sleeved outside the coaxial cable and the inner tube to form a first cavity with the inner tube, and the water outlet tank is fixedly sleeved outside the inner tube and the outer tube to form a second cavity with the outer tube, the water inlet pipe is communicated with the first cavity, the water outlet pipe is communicated with the second cavity, the supply device is communicated with the water inlet pipe and the water outlet pipe respectively, so that the supply device, the water inlet pipe, the first cavity, the first channel, the second cavity and the water outlet pipe are communicated in sequence to form a closed pipeline, and the negative pressure device is arranged in the closed pipeline and used for driving cooling liquid in the supply device to circularly flow in the direction from the water inlet pipe to the water outlet pipe.
Optionally, the ablation needle further comprises a radio frequency connector and a transition box, the radio frequency connector is connected with the coaxial cable, and the transition box is fixedly sleeved outside the radio frequency connector and the coaxial cable.
Optionally, an air bag is arranged on the water outlet pipe, and the air bag is made of transparent materials.
Optionally, the coaxial cable, the inner tube and the outer tube are coaxially arranged.
The embodiment of the invention has the beneficial effects that:
the ablation needle comprises an outlet tank and a plug connector, wherein the outlet tank is provided with a plug-in connection groove, the plug connector is used for accommodating the thermistor, and the plug connector is inserted into the plug-in connection groove and can be detached and fixed, so that the thermistor is immersed below the liquid level of cooling liquid in the outlet tank, the temperature of the cooling liquid in the outlet tank can be measured by the thermistor, and the purpose of temperature detection in the operation is further achieved. Because the plug connector can be dismantled fixedly with the inserting groove, consequently, when in actual use, the ablation needle that itself provided can insert the plug connector in the inserting groove, can also follow the inserting groove and take out the plug connector to make the thermistor in the plug connector can be used repeatedly, and then make same thermistor can cooperate different ablation needles to use in the art, solved different thermistors that melt the needle and use and the temperature measuring result that leads to has the problem of deviation, improved the accuracy of temperature measuring in the art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 an ablation needle according to an embodiment of the present invention;
FIG. 2 is a second schematic structural view of an ablation needle according to an embodiment of the present invention;
FIG. 3 is a third schematic structural view of an ablation needle according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural view of an ablation needle according to an embodiment of the present invention.
Icon: 100-an ablation needle; 10-an outer tube; 11-an inner tube; 111-a second channel; 12-a coaxial cable; 121 — a first channel; 13-a needle head; 14-a water inlet tank; 15-water outlet tank; 151-a plug groove; 16-a water inlet pipe; 17-a water outlet pipe; 18-a radio frequency connector; 19-a transition box; 20-plug connector; 21-a first end portion; 22-a second end; 23-a recess; 30-air bag.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "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 and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and fig. 2, the present embodiment provides an ablation needle 100, which includes a water outlet tank 15 and an insertion component 20, wherein the water outlet tank 15 is provided with an insertion groove 151, the insertion component 20 is used for accommodating a thermistor, and the insertion component 20 is inserted into the insertion groove 151 to be detachably fixed, so that the thermistor is immersed under the liquid level of a cooling liquid in the water outlet tank 15. The ablation needle 100 can improve the accuracy of intraoperative temperature detection.
It should be noted that, as shown in fig. 1 and fig. 2, the ablation needle 100 includes a water outlet tank 15, and a plug groove 151 is disposed on the water outlet tank 15, so that the thermistor can extend into the water outlet tank 15 through the plug groove 151 and contact with the cooling liquid in the water outlet tank 15, so that the thermistor can measure the temperature of the cooling liquid in the water outlet tank 15, thereby achieving the purpose of intraoperative temperature measurement. The ablation needle 100 further comprises a plug connector 20, wherein the plug connector 20 is used for accommodating the thermistor, so that an accommodating space is provided for the thermistor through the plug connector 20, and the thermistor is protected through the plug connector 20. Besides, the plug-in unit 20 can be inserted into the plug-in slot 151 and detachably fixed with the plug-in slot 151, so that when the ablation needle 100 is discarded after being used, the plug-in unit 20 can be taken out of the plug-in slot 151, so that the thermistor in the plug-in unit 20 can be repeatedly used, and the same thermistor can be matched with different ablation needles 100 for use in an operation.
Compared with the prior art in which different ablation needles are used, the temperature detection results measured by the thermistors of all the ablation needles are deviated due to the fact that the thermistors of different ablation needles are different and the resistance values of different thermistors are different, so that the accuracy of intraoperative temperature detection is seriously affected, the ablation needle 100 provided by the utility model can insert the plug connector 20 into the plug-in slot 151 and take out the plug connector 20 from the plug-in slot 151, so that the thermistors in the plug connector 20 can be repeatedly used, the same thermistor can be matched with different ablation needles 100 to be used in an operation, the problem that the temperature detection results are deviated due to the fact that different thermistors used by different ablation needles 100 are different is solved, and the accuracy of intraoperative temperature detection is improved.
It should be noted that, when the thermistor is accommodated in the plug 20, the thermistor and the plug 20 may be fixed by medical adhesive in order to improve the stability of the thermistor. The plug 20 needs to have good thermal conductivity so that the thermistor housed in the plug 20 can accurately obtain the temperature of the cooling liquid in the outlet tank 15. For example, the plug 20 and the socket 151 may be made of brass. When the plug 20 is inserted into the insertion groove 151 and fixed, the insertion groove 151 needs to be sealed to prevent the coolant in the outlet tank 15 from flowing out through the insertion groove 151.
Regarding the actual position of the insertion groove 151, those skilled in the art should be able to make reasonable selection and design according to the actual situation, and no particular limitation is imposed herein. Illustratively, as shown in FIGS. 1 and 2, in this embodiment, the insertion groove 151 is located at the bottom of the outlet box 15. Of course, in other embodiments, the insertion groove 151 may be located on the top or side wall of the outlet tank 15, so that the thermistor can be immersed under the surface of the cooling fluid in the outlet tank 15 when the plug 20 is inserted into the insertion groove 151 and fixed detachably.
As mentioned above, the ablation needle 100 comprises the water outlet tank 15 and the plug connector 20, the water outlet tank 15 is provided with the plug-in groove 151, the plug connector 20 is used for accommodating the thermistor, and the plug connector 20 is inserted into the plug-in groove 151 to be detachably fixed, so that the thermistor is immersed under the liquid level of the cooling liquid in the water outlet tank 15, the temperature of the cooling liquid in the water outlet tank 15 can be measured by the thermistor, and the purpose of intraoperative temperature detection is achieved. Because the plug connector 20 and the plug-in groove 151 can be dismantled fixedly, therefore, in practical use, the ablation needle 100 that provides per se can insert the plug connector 20 into the plug-in groove 151, can also take out the plug connector 20 from the plug-in groove 151, thereby make the thermistor in the plug connector 20 can be used repeatedly, and then make same thermistor can cooperate different ablation needles 100 to use in the art, the problem that the temperature detection result that the thermistor that different ablation needles 100 used is different and leads to has the deviation has been solved, the accuracy of temperature detection in the art has been improved.
As shown in fig. 1 and 2, in the present embodiment, the plug 20 has a first end 21 and a second end 22 opposite to each other, the first end 21 of the plug 20 penetrates the insertion groove 151 to be immersed under the surface of the cooling liquid in the water tank 15, and the plug 20 is detachably fixed to the insertion groove 151 by the second end 22.
Regarding the inner diameter of the plug 20, those skilled in the art should be able to make a reasonable choice and design according to the outer diameter of the thermistor, and there is no particular limitation. Regarding the outer diameter of the first end portion 21 of the plug 20, since the first end portion 21 of the plug 20 penetrates the insertion groove 151 to be immersed under the surface of the cooling liquid in the water tank 15, the outer diameter of the first end portion 21 needs to be smaller than the inner diameter of the insertion groove 151, and regarding the outer diameter of the second end portion 22 of the plug 20, since the plug 20 is detachably fixed by being inserted into the insertion groove 151, the outer diameter of the second end portion 22 may be larger than the inner diameter of the insertion groove 151, so that the plug 20 and the insertion groove 151 can be detachably fixed by interference fit.
However, when the plug 20 and the insertion groove 151 are fixed by interference fit, taking out the plug 20 from the insertion groove 151 is laborious, and even a serious person may damage the outlet tank 15 and/or the plug 20, and therefore, in this embodiment, the second end 22 of the plug 20 is provided with a first thread (not shown in the figure), and the inner wall surface of the insertion groove 151 is provided with a second thread (not shown in the figure), so that the plug 20 and the insertion groove 151 can be detachably fixed by threaded connection.
Thus, when the plug-in unit 20 needs to be inserted into the insertion groove 151 to be fixed, the first end portion 21 of the plug-in unit 20 is inserted into the insertion groove 151, and then the plug-in unit 20 is screwed to the second end portion 22 to be in threaded connection with the insertion groove 151; when the plug-in unit 20 needs to be taken out of the insertion groove 151 to be released from the fixed state, the plug-in unit 20 is screwed in the opposite direction until the second end portion 22 is disconnected from the insertion groove 151, and then the first end portion 21 of the plug-in unit 20 is taken out of the insertion groove 151.
As shown in fig. 2, in the present embodiment, a recessed portion 23 is disposed on a side of the second end 22 away from the first end 21, and a sealant layer is filled between the recessed portion 23 and the insertion groove 151 to further improve the sealing property between the insertion member 20 and the insertion groove 151, so as to further prevent the cooling liquid in the outlet box 15 from flowing out through the insertion groove 151. Illustratively, the encapsulant layer is a solder layer.
Thus, when the plug 20 needs to be inserted into the insertion groove 151 to be fixed, the first end portion 21 of the plug 20 is inserted into the insertion groove 151, the plug 20 is screwed to the second end portion 22 to be in threaded connection with the insertion groove 151, and the sealant is filled between the recessed portion 23 and the insertion groove 151 (for example, the solder is melted and then solidified); when the plug-in unit 20 needs to be removed from the insertion groove 151, the sealant is removed from between the recessed portion 23 and the insertion groove 151 (for example, the solder is melted again and removed), the plug-in unit 20 is screwed in the opposite direction until the second end 22 is disconnected from the insertion groove 151, and the first end 21 of the plug-in unit 20 is removed from the insertion groove 151.
As shown in fig. 1, in the present embodiment, the ablation needle 100 further includes an outer tube 10, an inner tube 11, a coaxial cable 12, a needle 13, a water inlet tank 14, a water inlet pipe 16, a water outlet pipe 17, a supply device and a negative pressure device, wherein the coaxial cable 12 is disposed in the inner tube 11 and the end portion of the coaxial cable extends out of the inner tube 11, the inner tube 11 is disposed in the outer tube 10 and the end portion of the inner tube extends out of the outer tube 10, a first gap formed between the coaxial cable 12 and the inner tube 11 is used as a first channel 121, a second gap formed between the inner tube 11 and the outer tube 10 is used as a second channel 111, the first channel 121 is communicated with the second channel 111, the needle 13 extends into the outer tube 10 and is fixed and connected to the coaxial cable 12, the water inlet tank 14 is fixedly sleeved outside the coaxial cable 12 and the inner tube 11 and forms a first chamber with the inner tube 11, the water outlet tank 15 is fixedly sleeved outside the inner tube 11 and the outer tube 10 and forms a second chamber with the outer tube 10, the water inlet pipe 16 is communicated with the first cavity, the water outlet pipe 17 is communicated with the second cavity, the supply device is communicated with the water inlet pipe 16 and the water outlet pipe 17 respectively, so that the supply device, the water inlet pipe 16, the first cavity, the first channel 121, the second channel 111, the second cavity and the water outlet pipe 17 are communicated in sequence to form a closed pipeline, and the negative pressure device is arranged in the closed pipeline and used for driving cooling liquid in the supply device to circularly flow in the direction from the water inlet pipe 16 to the water outlet pipe 17. Wherein, syringe needle 13 and outer tube 10 can adopt medical stainless steel to make to have better compatibility through medical stainless steel and human tissue, thereby avoid appearing adverse reactions such as rejection as far as possible, syringe needle 13 can be the triangular prism or the conical, thereby is convenient for puncture the affected part.
It should be noted that, in the microwave ablation tumor therapy, a large amount of heat may be generated around the coaxial cable 12, in order to avoid injury to the patient and damage to the device itself, therefore, the ablation needle 100 forms a closed pipeline by sequentially communicating the supply device, the water inlet pipe 16, the first cavity, the first channel 121, the second channel 111, the second cavity and the water outlet pipe 17, and drives the cooling liquid in the supply device to circularly flow along the direction from the water inlet pipe 16 to the water outlet pipe 17 through the negative pressure device, so that heat exchange is performed on the coaxial cable 12 through the cooling liquid, and the temperature around the coaxial cable 12 is further reduced. For example, since the specific heat capacity of water is large, the cooling liquid may be water, the supply device may be a water bottle, and the negative pressure device may be a negative pressure pump.
It should be noted that, in order to avoid leakage of the cooling water, the above-mentioned supply device, the water inlet pipe 16, the first chamber, the first channel 121, the second channel 111, the second chamber and the water outlet pipe 17 need to ensure their own sealing performance, and also need to ensure the sealing performance of the connection between the two, and those skilled in the art should be able to achieve the above-mentioned purpose by adding a sealing ring, filling a sealing agent, etc. according to actual situations, and will not be described in detail here.
As shown in fig. 1, in this embodiment, the ablation needle 100 further includes a radio frequency connector 18 and a transition box 19, the radio frequency connector 18 is connected to the coaxial cable 12, and the transition box 19 is fixedly sleeved outside the radio frequency connector 18 and the coaxial cable 12, so as to protect the radio frequency connector 18 and the coaxial cable 12 through the transition box 19. It should be noted that, in order to improve the heat exchange effect between the cooling liquid and the coaxial cable 12, the water inlet tank 14, the water outlet tank 15, and the transition tank 19 may be made of brass.
Referring to fig. 3, in the present embodiment, the coaxial cable 12, the inner tube 11 and the outer tube 10 are coaxially disposed, so that heat exchange between the cooling liquid and the coaxial cable 12 is more uniform, the temperature around the coaxial cable 12 can be more uniformly reduced, and the stability of the ablation needle 100 during the use process is further improved.
The traditional temperature monitoring method has the following disadvantages: the temperature of cooling water can be judged only by matching with a microwave ablation instrument, the detection accuracy of the instrument and the stability of a thermistor are extremely depended on, and the reliability of temperature monitoring in the operation is seriously influenced.
Therefore, referring to fig. 4 again, in the present embodiment, the air bag 30 is disposed on the water outlet pipe 17, the air bag 30 is made of a transparent material, when the ablation needle 100 is in normal operation, liquid droplets in the air bag 30 can drop at a constant speed, the inner wall of the air bag 30 is transparent and visible, and when the ablation needle 100 is in abnormal operation (when the temperature of the coolant is too high), the coolant is vaporized due to the too high temperature and adheres to the inner wall of the air bag 30, so that the inner wall of the air bag 30 generates water mist. Wherein, optionally, the diameter of the balloon 30 is between 15mm and 25mm, for example, the diameter of the balloon 30 is 15mm, 18mm, 20mm, 22mm or 25mm, etc.
Therefore, a doctor can observe water drops in the air bag 30 through naked eyes in an operation, directly judges whether cooling liquid in the circulating pipeline normally flows, can also observe whether water mist appears on the inner wall of the air bag 30 through the naked eyes in the operation, directly judges whether the cooling liquid in the circulating pipeline has the problem of temperature rise, so that effective measures can be taken timely, the problems of accuracy of a microwave ablation instrument, stability of a thermistor and the like do not need to be considered, and reliability of temperature detection in the operation is improved.
In summary, the ablation needle 100 provided by the present application has dual temperature detection functions, namely a temperature detection function in which a traditional thermistor and a microwave ablation instrument are matched, and a temperature detection function in which a doctor directly determines through visual observation, so as to significantly improve the safety and reliability of the operation, and ensure that the doctor can find abnormal phenomena in the operation at the first time and take measures in time.
The above description is only a preferred embodiment 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 (10)
1. The ablation needle is characterized by comprising a water outlet tank and a plug connector, wherein the water outlet tank is provided with a plug-in connection groove, the plug connector is used for accommodating a thermistor, and the plug connector is inserted into the plug-in connection groove and can be detachably fixed, so that the thermistor is immersed under the liquid level of cooling liquid in the water outlet tank.
2. The ablation needle of claim 1, wherein the connector has first and second opposite ends, the first end of the connector penetrating the channel and being immersed below the level of cooling fluid in the outlet tank, the connector being removably secured to the channel by the second end.
3. The ablation needle of claim 2, wherein the second end of the connector is provided with a first thread and the inner wall of the insertion groove is provided with a second thread, the connector being in threaded connection with the insertion groove.
4. The ablation needle of claim 2, wherein an outer diameter of the first end portion is smaller than an inner diameter of the insertion groove, an outer diameter of the second end portion is larger than the inner diameter of the insertion groove, and the plug member is in interference fit with the insertion groove.
5. The ablation needle of any one of claims 2-4, wherein a side of the second end portion away from the first end portion is provided with a recess, and a sealant layer is filled between the recess and the insertion groove.
6. The ablation needle of claim 5, wherein the sealant layer is a solder layer.
7. The ablation needle according to claim 1, further comprising an outer tube, an inner tube, a coaxial cable, a needle head, a water inlet tank, a water inlet pipe, a water outlet pipe, a supply device and a negative pressure device, wherein the coaxial cable is disposed inside the inner tube and has an end portion extending out of the inner tube, the inner tube is disposed inside the outer tube and has an end portion extending out of the outer tube, a first gap formed between the coaxial cable and the inner tube at an interval serves as a first channel, a second gap formed between the inner tube and the outer tube at an interval serves as a second channel, the first channel is communicated with the second channel, the needle head extends into the outer tube and is fixed and connected with the coaxial cable, the water inlet tank is fixedly sleeved outside the coaxial cable and the inner tube and forms a first cavity with the inner tube, and the water outlet tank is fixedly sleeved outside the inner tube and the outer tube and forms a second cavity with the outer tube, the water inlet pipe is communicated with the first cavity, the water outlet pipe is communicated with the second cavity, the supply device is communicated with the water inlet pipe and the water outlet pipe respectively, so that the supply device, the water inlet pipe, the first cavity, the first channel, the second cavity and the water outlet pipe are communicated in sequence to form a closed pipeline, and the negative pressure device is arranged in the closed pipeline and used for driving cooling liquid in the supply device to circularly flow in the direction from the water inlet pipe to the water outlet pipe.
8. The ablation needle of claim 7, further comprising a radio frequency connector and a transition box, wherein the radio frequency connector is connected to the coaxial cable, and the transition box is fixedly sleeved outside the radio frequency connector and the coaxial cable.
9. The ablation needle of claim 7, wherein the water outlet pipe is provided with a balloon, and the balloon is made of a transparent material.
10. The ablation needle of claim 7, wherein the coaxial cable, the inner tube, and the outer tube are coaxially disposed.
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| CN202110723565.2A CN113397696A (en) | 2021-06-29 | 2021-06-29 | Ablation needle |
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| CN202110723565.2A CN113397696A (en) | 2021-06-29 | 2021-06-29 | Ablation needle |
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| CN113397696A true CN113397696A (en) | 2021-09-17 |
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