CN210019627U - Cryoablation needle - Google Patents
Cryoablation needle Download PDFInfo
- Publication number
- CN210019627U CN210019627U CN201822048033.XU CN201822048033U CN210019627U CN 210019627 U CN210019627 U CN 210019627U CN 201822048033 U CN201822048033 U CN 201822048033U CN 210019627 U CN210019627 U CN 210019627U
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- needle
- tube
- working medium
- vacuum
- cryoablation
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- 238000010992 reflux Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 2
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 230000002195 synergetic effect Effects 0.000 description 10
- 239000000758 substrate Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 206010028980 Neoplasm Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000002681 cryosurgery Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000000315 cryotherapy Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000000015 thermotherapy Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a cryoablation needle, include the syringe needle portion of being connected with the one end of syringe needle portion, the other end of syringe needle portion is used for the inflow and the backward flow of working medium, and its inflow core pipe extends to the needle point region of syringe needle portion, and with the inner wall of syringe needle portion forms working medium backward flow route, the position of inflow core pipe has seted up a plurality of perforating holes on the inner wall of the heat exchange area of syringe needle portion. This scheme can effectively reduce the flow resistance in syringe needle heat exchange area through configuration optimization for the treatment heat transfer can effectively strengthen, based on this, can avoid reducing the influence of needle tubing member pipe diameter to heat transfer production, thereby for reducing the needle tubing size and provide technical guarantee, and then ensure treatment on the basis that reduces patient's wound.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to cryoablation needle.
Background
It is well known that the traditional therapeutic means for surgical removal of malignant tumor has large trauma, much bleeding and slow recovery of patients. In addition, normal cells around tumor tissues are also killed during the radiotherapy and chemotherapy treatment. With the development of clinical technology, the american Endocare company developed a minimally invasive surgical system of ultra-low temperature interventional cryoablation devices, and clinical data indicate that the system has a good curative effect. However, the system uses argon and helium as the treatment working medium, so that the operation cost is expensive and the system cannot be widely applied.
Based on this, the cryoablation needle that uses liquid nitrogen as the refrigerant has been proposed among the prior art, because technical limitation can't realize the product diameter and refine, directly influences patient experience, can't satisfy not only have the effect of cryotherapy but also can satisfy the demand of wicresoft.
In view of this, it is desirable to optimize the design of the conventional cryoablation needle so as to reduce the diameter of the product on the basis of meeting the heat exchange requirement in the treatment process.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a cryoablation needle can effectively reduce the flow resistance in syringe needle heat exchange area through configuration optimization to promote heat exchange efficiency, provide the technical guarantee basis for the miniaturized design of needle tubing diameter.
The utility model provides a needle is melted in refrigeration, include the syringe needle portion of being connected with the one end of syringe needle portion, the other end of syringe needle portion is used for the inflow and the backward flow of working medium, and its inflow core pipe extends to the needle point region of syringe needle portion, and with the inner wall of syringe needle portion forms working medium backward flow route, the position of inflow core pipe has seted up a plurality of perforating holes on the inner wall of the heat exchange area of syringe needle portion.
Preferably, the heat exchanger further comprises a spiral synergistic member, wherein the spiral synergistic member is fixedly arranged in the working medium return passage of the heat exchange area and is coaxially arranged with the inflow core pipe.
Preferably, the spiral effect element has a circular or rectangular cross-section of its body.
Preferably, the spiral synergistic piece is fixedly connected with the inner wall of the needle head part and/or the outer wall of the inflow core pipe.
Preferably, the other end of the needle tube part is respectively communicated with the working medium inlet tube and the working medium return tube through a three-way joint; and the working medium which flows back through the working medium return pipe is collected through a temperature detection device and fed back to the control unit and/or the display unit.
Preferably, two ends of the reflux inner tube of the needle tube part, which is communicated with the working medium reflux passage, are respectively inserted and fixed in the needle head part and the reflux inlet of the three-way joint; the other end of the needle tube portion is configured to: the working medium inlet pipe and the working medium return pipe are respectively communicated with the inlet and the return of the three-way joint.
Preferably, the vacuum base body cover is covered on the outer side of the three-way joint; one end of the vacuum heat insulation outer tube of the needle tube part is inserted into the backflow inlet interface of the vacuum base body cover, and the other end of the vacuum heat insulation outer tube of the needle tube part is sleeved at the outer end of the needle head part; the working medium inflow pipe is sleeved with an outer layer vacuum pipe, and the outer layer vacuum pipe is communicated with the inflow interface of the vacuum base body cover through an outer layer vacuum corrugated pipe.
Preferably, the vacuum substrate cover is provided with getter means to establish a state of maintaining an internal vacuum.
Preferably, the external reflux connection pipe is sleeved outside the reflux interface of the vacuum substrate cover, and the working medium reflux pipe extends out of the reflux interface of the vacuum substrate cover and then is communicated with the external reflux connection pipe.
Preferably, the temperature detection device is arranged in the outer return connection pipe at a position close to the pipe end of the working medium return pipe.
To prior art, the utility model discloses heat exchange area to the cryoablation needle has carried out configuration optimization, specifically, a plurality of perforating holes have been seted up on the inner wall that is located the heat exchange area of syringe needle portion of inflow core pipe, so set up, the working medium of gasification of being heated in the inflow core pipe can directly get into working medium backward flow route via this perforating hole in advance, in order to avoid the influence of gaseous state working medium flow resistance in the working medium inflow route to probably producing, make the treatment heat transfer effectively strengthen, based on this, can avoid the influence of needle tubing component pipe diameter to heat exchange production, thereby provide technical guarantee for reducing the needle tubing size, and then ensure treatment on the basis that reduces patient's wound.
In the preferred scheme of the utility model, a spiral synergistic member is added in the working medium return passage of the heat exchange area, and the spiral synergistic member is coaxially arranged with the inflow core pipe; in the treatment process, the working medium flows along the spiral synergistic piece along with the working medium entering the working medium backflow passage through the needle point, so that the liquid working medium is in full contact with the needle body for heat exchange, and even if a small amount of gaseous working medium is reserved in the working medium, the heat exchange performance can be further enhanced.
In another preferred embodiment of the present invention, the working medium flowing back through the working medium return pipe is collected by the temperature detecting device and fed back to the control unit and/or the display unit to monitor the temperature of the therapeutic end of the cryoablation needle in real time, and further confirm the effectiveness of the cryosurgery and the stability of the system operation.
Drawings
FIG. 1 is a schematic view of the overall structure of a cryoablation needle according to an embodiment;
FIG. 2 is a schematic view of a partial mating relationship of the tip segment and the needle cannula portion;
FIG. 3 is an enlarged view of section I of FIG. 2;
FIG. 4 is an enlarged view of section II of FIG. 2;
FIG. 5 is an enlarged view of section III of FIG. 1;
FIG. 6 is an enlarged partial schematic view of the cryoablation needle of the second embodiment;
fig. 7 is a partially enlarged schematic view of the cryoablation needle according to the third embodiment.
In the figure:
the vacuum heat-insulating vacuum pump comprises a needle head part 10, an inner wall 11, a needle tube part 20, a flow inlet core tube 21, a through hole 211, a backflow inner tube 22, a vacuum heat-insulating outer tube 23, a spiral synergistic piece 24, a working medium backflow tube 31, an external backflow connecting tube 32, a temperature detection device 33, a three-way joint 41, a backflow inlet 411, a flow inlet 412, a backflow outlet 413, a backflow cavity 414, a vacuum base body cover 42, a backflow inlet 421, a flow inlet 422, a backflow connector 423, a getter device 43, a working medium flow inlet 51, an outer vacuum tube 52 and an outer vacuum corrugated tube 53.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The first embodiment is as follows:
referring to fig. 1, a schematic diagram of the overall structure of the cryoablation needle according to the present embodiment is shown.
As shown in the figure, the cryoablation needle comprises a needle head part 10 used for placing patient tissues in an operation, a needle tube part 20 with one end connected with the needle head part 10, and the other end of the needle tube part 20 is used for inflow and backflow of working media, so that after the working media flow to a needle point part from an inflow core tube 21, heat exchange is realized through a working media backflow passage formed between the working media and an inner wall 11 of the needle head part 10, and then the working media flow back to a system through a working media backflow pipe 31. Referring also to fig. 2, an enlarged partial view of the tip segment and the needle cannula portion is shown. As shown in fig. 2, the core tube 21 extends to the needle tip region of the needle tip portion 10 and forms a working medium backflow passage with the inner wall of the needle tip portion 20.
In the present embodiment, the inner wall of the core tube 21 located in the heat exchange area a of the needle head 10 is provided with a plurality of through holes 211. Please refer to fig. 3, which is an enlarged view of part i of fig. 2. In the using state, the working medium heated and gasified in the inflow core tube 21 can directly enter the working medium backflow passage through the through hole 211 in advance, so that the flow resistance in the passage inside the needle tip part is prevented from being influenced by the existence of the gaseous working medium, and the treatment heat exchange is effectively enhanced. On the basis, the influence of the small-diameter needle tube component on heat exchange can be avoided, and technical guarantee is provided for reducing the size of the needle tube. It should be understood that the through hole 211 is disposed in the heat exchange region a, which is a region where the needle tip portion 10 mainly exchanges heat with the tumor tissue, so as to effectively enhance the heat exchange effect.
Wherein, one end of the needle tube part 20 is connected with the needle head part 10, and the other end is respectively communicated with the working medium inlet tube 51 and the working medium return tube 31 through the three-way joint 41. Specifically, the reflux inner tube 22 of the needle tube part 20 is communicated with the working medium reflux passage, one end of the reflux inner tube is inserted and fixed in the needle head part 10, and the other end is inserted and fixed in the reflux inlet 411 of the three-way joint 41; please refer to fig. 4, which is an enlarged view of part ii of fig. 2.
The other end of the needle tube 20 is configured to: the inlet core tube 21 extends into the three-way joint 41 through the return inner tube 22 and then is sealed and connected with the inner wall thereof, so as to form a return cavity 414 between the inlet core tube 21 and the inner wall of the three-way joint 41, the working medium inlet tube 51 is communicated with the inlet 412 of the three-way joint 41, and the working medium return tube 31 is communicated with the return port 413 of the three-way joint 41. Here, the specific structural form of the three-way joint 41 is not limited to the shape shown in the drawings as long as the functional requirements for establishing the working medium inflow passage and the return passage are satisfied.
Further, the needle tube 20 of the cryoablation needle should have a vacuum insulation area B to avoid cryogenically damaging other tissues than the non-tumor tissues and affecting the convenience of the medical staff in operation. Please refer to fig. 5, which is an enlarged view of part iii of fig. 1. Referring to fig. 1 and 5, the vacuum substrate cover 42 covers the outside of the three-way joint 41, one end of the vacuum heat-insulating outer tube 23 of the needle tube part 20 is inserted into the inlet/return port 421 of the vacuum substrate cover 42, and the other end is sleeved on the outer end of the needle head part 10; similarly, an outer vacuum tube 52 is sleeved on the working medium inlet tube 51, and the outer vacuum tube 52 is communicated with the inlet port 422 of the vacuum substrate cover 42 through an outer vacuum bellows 53. According to the scheme, outer layer vacuum isolation is established through outer layer components such as the vacuum heat insulation outer pipe 23, the vacuum base body cover 42, the outer layer vacuum corrugated pipe 53 and the outer layer vacuum pipe 52, and the heat insulation performance is good. Except for the treatment area, other parts of the cryoablation needle are in a normal temperature state, so that the patient and the user are effectively protected from being injured.
In addition, based on the better bending performance of the corrugated pipe, the connecting section of the corrugated pipe and the working medium input of the system moves backwards, so that the weight of the front-end operation part is reduced, a certain buffering effect can be achieved, and the operation of medical staff in the operation is facilitated.
During use, the vacuum degree of the vacuum isolation of the outer layer may be reduced, and a getter device 43 may be added to avoid affecting the heat insulation performance, so as to establish a vacuum state for maintaining the vacuum state of the vacuum substrate cover 42 and the inside of the whole vacuum isolation outer layer. The getter device 43 can be realized by the prior art, and is not the core point of the present application, so that the detailed description thereof is omitted.
As shown in fig. 1, the external return connection pipe 32 is sleeved outside the return port 423 of the vacuum substrate cover 42, and the working medium return pipe 31 extends out of the return port 423 of the vacuum substrate cover 42 and then is communicated with the external return connection pipe 32. Preferably, the working medium returned by the working medium return pipe 31 is collected by the temperature detection device 33 and fed back to the control unit and/or the display unit (not shown in the figure), and the temperature of the treatment end of the cryoablation needle can be monitored in real time by being connected with the system, so that the effectiveness of the cryosurgery and the stability of the system operation can be confirmed.
In practical application, after the cryoablation needle is connected with a system, a cryoablation working medium-liquid nitrogen is output under the control of the system, the liquid nitrogen reaches the treatment area of the needle head part 10 and the needle tube part 20 along the inflow core tube 21, so that the temperature of the treatment area is reduced to a treatment freezing temperature (such as but not limited to-196 ℃), the liquid nitrogen flows out along the working medium return tube 31, passes through the temperature detection device 33, and the treatment temperature condition is determined in real time through the temperature detection device 33. When the treatment time is reached, the tumor tissue forms an ice ball, the freezing working medium is closed through system control, the thermotherapy working medium-absolute ethyl alcohol is output, the circulation is carried out according to the pipeline, the temperature of a treatment area reaches the treatment ablation temperature (such as but not limited to about 75 ℃), the ice ball frozen by the tumor tissue is rapidly thawed, and the lesion tissue is thoroughly necrotized under the effect of cold and hot alternation, so that the treatment purpose is achieved.
Example two:
the difference between the present solution and the first embodiment is that a spiral effect-increasing member 24 is added to improve the heat exchange performance. Referring to fig. 6, a partially enlarged schematic view of a specific matching relationship of the spiral effect element is shown. For clarity of illustration of the differences and connections between the present solution and the cryoablation needle illustrated in the first embodiment, the same functional components are illustrated with the same reference numerals in the drawings.
As shown in the figure, the spiral synergistic element 24 is fixedly arranged in the working medium return passage of the heat exchange area a and is coaxially arranged with the inflow core pipe 21. In the treatment process, along with the working medium enters the working medium backflow passage through the needle point, the working medium passing through the heat exchange area A flows along the spiral effect-increasing piece 24, and by the arrangement, the liquid working medium tends to the needle head body and is in full contact with the needle head body for heat exchange, even if a small amount of gaseous working medium is reserved in the working medium, the heat exchange performance can be further enhanced, and a good treatment effect is ensured.
In this embodiment, the cross section of the body of the spiral synergistic element 24 may be circular as shown in the figure, or may be other shapes such as rectangular, etc., as long as the function and effect of guiding the heat of the working medium flow are all within the scope of the claimed invention.
Furthermore, the spiral synergist 24 may be fixed in different ways in the working medium return passage, such as, but not limited to, being fixedly connected to the inner wall 11 of the needle section 10 and/or fixedly connected to the outer wall of the inlet core tube 21, preferably at a lower process cost.
Example three:
the difference between this solution and the second embodiment is that only the spiral effect-increasing element 24 is used, which improves the heat exchange. Referring to fig. 7, a partially enlarged schematic view of a specific matching relationship of the spiral effect element is shown. In order to clearly illustrate the differences and connections between the present solution and the cryoablation needles of the first and second embodiments, the same functional components are indicated by the same reference numerals in the drawings.
As shown in the figure, the spiral synergistic element 24 is fixedly arranged in the working medium return passage of the heat exchange area a and is coaxially arranged with the inflow core pipe 21. The specific functional effects are completely the same as those described in the second embodiment, and therefore the detailed description is omitted here.
It should be noted that the head of the cryoablation needle is shown as being bent at 90 degrees, and obviously, the shape is designed only for improving the convenience of operation without loss of generality, and the verified invention point of the embodiment is not limited to the shape shown in the drawings.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. A cryoablation needle comprises a needle head part (10) connected with one end of a needle tube part (20), the other end of the needle tube part (20) is used for inflow and backflow of working media, a flow inlet core tube (21) of the cryoablation needle extends to a needle point area of the needle head part (10) and forms a working media backflow passage with an inner wall (11) of the needle head part (10), and the cryoablation needle is characterized in that a plurality of through holes (211) are formed in the inner wall (11) of the flow inlet core tube (21) located in a heat exchange area of the needle head part (10).
2. The needle of claim 1, further comprising a helical multiplier (24), wherein the helical multiplier (24) is fixedly disposed within the working fluid return passage of the heat exchange region and is disposed coaxially with the core barrel inlet (21).
3. The cryoablation needle as recited in claim 2, wherein the helical augmentor (24) has a circular or rectangular body cross-section.
4. The cryoablation needle according to claim 2, wherein the helical multiplier (24) is fixedly connected to the inner wall (11) of the needle head (10) and/or to the outer wall of the inflow core tube (21).
5. The cryoablation needle according to any of the claims 1 to 3, wherein the other end of the needle tube part (20) is communicated with a working medium inlet tube (51) and a working medium return tube (31) through a three-way joint (41), respectively; and the working medium which flows back through the working medium return pipe (31) is collected through a temperature detection device (33) and fed back to the control unit and/or the display unit.
6. The cryoablation needle as claimed in claim 5, wherein the two ends of the reflux inner tube (22) of the needle tube part (20) communicated with the working medium reflux passage are respectively inserted and fixed in the needle head part (10) and the reflux inlet (411) of the three-way joint (41); the other end of the needle tube part (20) is configured to: the working medium inlet pipe (51) and the working medium return pipe (31) are respectively communicated with the inlet opening (412) and the return opening (413) of the three-way joint (41).
7. The needle of claim 6, further comprising a vacuum base cover (42) covering the outside of the three-way joint (41); one end of a vacuum heat insulation outer tube (23) of the needle tube part (20) is inserted into the inlet/return port (421) of the vacuum base body cover (42), and the other end is sleeved at the outer end of the needle head part (10); an outer layer vacuum tube (52) is sleeved on the working medium inlet tube (51), and the outer layer vacuum tube (52) is communicated with an inlet interface (422) of the vacuum base body cover (42) through an outer layer vacuum corrugated tube (53).
8. Cryoablation needle according to claim 7, wherein said vacuum base cover (42) is provided with getter means (43) to establish a maintained internal vacuum.
9. The needle of claim 8, wherein an external reflux connection pipe (32) is sleeved outside the reflux interface (423) of the vacuum base body cover (42), and the working medium reflux pipe (31) is communicated with the external reflux connection pipe (32) after extending out of the reflux interface (423) of the vacuum base body cover (42).
10. The cryoablation needle according to claim 9, wherein the temperature detection device (33) is arranged in the outer return connection (32) at a location close to the end of the working medium return tube (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822048033.XU CN210019627U (en) | 2018-12-06 | 2018-12-06 | Cryoablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822048033.XU CN210019627U (en) | 2018-12-06 | 2018-12-06 | Cryoablation needle |
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| Publication Number | Publication Date |
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| CN210019627U true CN210019627U (en) | 2020-02-07 |
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| CN201822048033.XU Active CN210019627U (en) | 2018-12-06 | 2018-12-06 | Cryoablation needle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113576648A (en) * | 2021-06-30 | 2021-11-02 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
| CN115836907A (en) * | 2022-07-13 | 2023-03-24 | 海杰亚（北京）医疗器械有限公司 | Fluid channel and ablation needle system |
| US11633224B2 (en) | 2020-02-10 | 2023-04-25 | Icecure Medical Ltd. | Cryogen pump |
-
2018
- 2018-12-06 CN CN201822048033.XU patent/CN210019627U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11633224B2 (en) | 2020-02-10 | 2023-04-25 | Icecure Medical Ltd. | Cryogen pump |
| CN113576648A (en) * | 2021-06-30 | 2021-11-02 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
| CN113576648B (en) * | 2021-06-30 | 2022-02-22 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
| US11540868B1 (en) | 2021-06-30 | 2023-01-03 | Hygea Medical Technology Co., Ltd. | Ablation device |
| WO2023273942A1 (en) * | 2021-06-30 | 2023-01-05 | 海杰亚（北京）医疗器械有限公司 | Ablation device |
| CN115836907A (en) * | 2022-07-13 | 2023-03-24 | 海杰亚（北京）医疗器械有限公司 | Fluid channel and ablation needle system |
| CN115836907B (en) * | 2022-07-13 | 2023-11-03 | 海杰亚（北京）医疗器械有限公司 | Fluid channel and ablation needle system |
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