CN215606068U - Shock wave generation conduit - Google Patents
Shock wave generation conduit Download PDFInfo
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- CN215606068U CN215606068U CN202121762833.3U CN202121762833U CN215606068U CN 215606068 U CN215606068 U CN 215606068U CN 202121762833 U CN202121762833 U CN 202121762833U CN 215606068 U CN215606068 U CN 215606068U
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Abstract
The utility model relates to a shock wave generation catheter, which comprises a catheter main body, a balloon and an electrode unit, wherein the balloon is arranged at the far end of the catheter main body, the electrode unit is arranged on the catheter main body in the balloon, the shock wave generation catheter also comprises a supporting piece, at least part of the supporting piece is positioned in the balloon, and when the supporting piece is supported on the inner wall of the balloon, the catheter main body is kept on the axis of the balloon. The distance between the balloon inner catheter main body and the balloon is locked through the supporting piece, so that when the shock wave generation catheter is bent in the use process or the balloon inner catheter main body needs to be bent, the balloon inner catheter main body still keeps a stable distance with the balloon, the shock wave is conveniently released by discharging of the electrode unit, unstable shock wave release caused by the fact that the electrode unit is close to the balloon is avoided, the stability of the treatment effect is guaranteed, the treatment efficiency and the success rate are improved, the structure is simple, and the production is easy.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a shock wave generation catheter.
Background
Cardiovascular stenosis refers to the condition that blood vessels of arteries and veins of human bodies, including coronary vessels, peripheral vessels, intracranial vessels and the like, due to abnormal lipid metabolism, lipid in blood is deposited on an originally smooth vascular intima, lipid plaques of atheroma are gradually accumulated, and the plaques are increased and even calcified to cause the stenosis in the vascular cavity over time, so that blood flow is blocked, and the blood vessels and the human bodies at the downstream are ischemic, thereby generating corresponding clinical manifestations. If the stenosis occurs in coronary artery, palpitation, chest pain, dyspnea, angina and the like can be generated, and serious patients can cause insufficient blood supply of cardiac muscle or cardiac muscle necrosis; if the disease occurs in the periphery, the skin epidermis temperature is reduced, the muscle is atrophied, and the like, so that intermittent claudication and even necrosis or amputation of the far-end limb occur; if it occurs in the cranium, dizziness, syncope, brain tissue damage and brain dysfunction may occur.
For solving the vascular damage that simple high pressure sacculus prediffused and cause, like intermediate layer, blood vessel stress fracture and broken hole scheduling problem, the device that has the function of producing shock wave begins to appear to the atherosclerosis or the calcified pathological change remodeling rethread of stenotic lesion blood vessel, this kind of mode is through sending the supersound to filling in the sacculus that has fluid medium and making the electrode form cavitation bubble and then produce shock wave, and the shock wave strikes calcified regional realization and strikes and smashes calcified pathological change.
In the prior art, in order to realize different treatment purposes and treatment means of the device, various structural designs are made on the shock wave generation catheter, and particularly, new structures are designed on the inner catheter to realize product effects, but in the use process, the inner catheter which cannot be stably maintained by the structures is positioned at the central position in the saccule and is easy to be eccentric, so that the discharge unit is eccentric, the discharge unit is close to the inner wall of the saccule, the shock wave released by the discharge unit is exponentially attenuated on one side of the shock wave far away from the inner wall of the saccule, and the side of the shock wave close to the inner wall of the saccule has great energy impact, which may cause that the part needing treatment cannot be impacted by the shock wave, and the part needing no treatment suffers great shock wave impact, which greatly affects the treatment effect of the system device used for the angiostenosis calcification treatment, even if more new structures are designed, the expected treatment effect cannot be achieved, and the research and development of new treatment schemes and means are seriously hindered while the existing diseases cannot be better treated.
Disclosure of Invention
It is an object of the present invention to provide a shock wave generating conduit for maintaining the central position of the inner conduit of the shock wave generating conduit.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a shock wave generation catheter comprises a catheter main body, a balloon and an electrode unit, wherein the balloon is arranged at the far end of the catheter main body, the electrode unit is arranged on the catheter main body inside the balloon, the shock wave generation catheter further comprises a support piece, the support piece is at least partially positioned inside the balloon, and when the support piece is supported on the inner wall of the balloon, the catheter main body is kept on the axis of the balloon.
Preferably, the part of the support member located in the balloon has an expanded state and a collapsed state, the support member is in the expanded state, the support member is supported on the inner wall of the balloon, and the support member can relatively fix the distance between the catheter body and the inner wall of the balloon, so as to prevent the catheter body from bending in the balloon; the support member is in the folded state, the support member is folded on the outer wall of the catheter main body, and the cross-sectional area of the balloon in the shock wave generation catheter can be reduced by folding the support member, so that the shock wave generation catheter can conveniently pass through a narrow place.
Further preferably, the supporting member includes a supporting bag, the supporting bag is disposed in the balloon, the catheter main body passes through the middle of the supporting bag, the supporting bag has a hollow inner cavity for filling with a fluid medium, the catheter main body is provided with a filling passage communicated with the hollow inner cavity, the supporting bag is in the inflated state, the hollow inner cavity of the supporting bag is filled with the fluid medium, the outer wall of the supporting bag is supported on the inner wall of the balloon, and after the two relatively independent inner and outer balloons are filled with the fluid medium, the inner supporting bag can effectively support the outer balloon.
Still further preferably, the support balloon is provided with at least one, when the support balloon is provided with a plurality of support balloons, the plurality of support balloons are distributed along the extending direction of the catheter main body, the filling channel is respectively communicated with the plurality of support balloons, the length of the balloon which can be supported by one support balloon is limited, and when the balloon is longer, the balloon is completely supported by the plurality of support balloon segments.
Still further preferably, the support balloon is provided with one electrode unit therein, and the arrangement of a plurality of electrode units in the support balloon may cause the length of the support balloon in the extending direction of the catheter main body to be too long, while the shorter support balloon has better support performance.
Still further preferably, the supporting bag is made of a compliant material, and/or the balloon is made of a semi-compliant material, and/or the catheter main body is made of a semi-compliant material, the compliant material comprises silica gel and PU, the semi-compliant material comprises nylon and Pebax, and the larger the compliance is, the easier the elastic deformation is when the balloon is stressed, so that the supporting bag can be elastically deformed with a smaller force to complete the supporting, and the balloon and the catheter main body are slightly less compliant, so that the balloon and the catheter main body are not deformed relatively, and the catheter main body is prevented from being eccentric.
Further preferably, the support member comprises a support strip, a part of the support strip is positioned in the balloon, and the proximal end of the catheter body is provided with a control member; the catheter body between the two ends of the balloon is provided with a support outlet and a support inlet, one end of the support strip is connected to the control element, the other end of the support strip penetrates through the catheter body and penetrates out of the support outlet and then penetrates through the support inlet to be connected to the far end of the catheter body, the support strip is used for supporting irrelevant parts of the balloon to be hidden in the catheter body, the influence of other structures on the catheter body can be avoided, and the balloon is better controlled to be switched between an expansion state and a folding state.
Still further preferably, the other end of the supporting strip is fixedly connected to the distal end of the catheter main body, when the control member is operated to move the supporting strip toward the distal end of the catheter main body, the portion of the supporting strip located in the balloon is switched from the collapsed state to the expanded state, the distal end of the supporting strip is in the advancing direction of movement, the supporting strip continues to extend forward from the proximal end side of the supporting strip, and the distal end of the supporting strip cannot advance, so that the supporting strip is forced to expand laterally and enters the expanded state.
Still further preferably, the support strip be provided with a plurality ofly, a plurality ofly the support strip be located support export, support the part between the entry and distribute around catheter body circumference, the support strip be in under the inflation state, the support strip be located support export, support the part between the entry to the direction arch of sacculus inner wall support in the sacculus inner wall on, through a plurality of the support strip of arching, with catheter body circumferential a plurality of directions support, avoid appearing the atress uneven.
Still further preferably, the support bar be provided with one, the support bar be located support export, support the part between the entry and follow the axial spiral of pipe main part extend, the support bar be in inflation state under, the support bar be located support export, support the part between the entry keep the spiral to extend and outwards strut to support the sacculus inner wall on, attached on the sacculus inner wall the support bar for the helix can be right the inner wall of sacculus everywhere realize even support, avoid appearing the atress uneven.
Still further preferably, the electrode unit is disposed on the catheter body between the support outlet and the support inlet, the support strip may have a portion for supporting effect between the support outlet and the support inlet, and the electrode unit disposed outside this range may have a negative effect on the therapeutic effect due to eccentricity of the catheter body.
Still more preferably, the shockwave generating catheter further comprises an operating handle connected to the proximal end of the catheter body, and the control member is disposed on the operating handle.
Still further preferably, the support bar adopt metal material, metal material include nickel titanium alloy, stainless steel, support export, support and have certain distance between the entry, adopt metal material can make the support bar rigidity stronger, can prolong support export, support the distance between the entry, play better supporting effect.
Preferably, the catheter main body comprises an inner catheter and an outer catheter sleeved outside the inner catheter, the distal end of the inner catheter extends out of the distal end of the outer catheter, the proximal end of the balloon is connected to the distal end of the outer catheter, the distal end of the balloon is connected to the inner catheter, and the electrode unit is arranged on the inner catheter inside the balloon.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the distance between the balloon inner catheter main body and the balloon is locked through the supporting piece, so that when the shock wave generation catheter is bent in the use process, the balloon inner catheter main body and the balloon keep a stable distance, the electrode unit is ensured to be positioned on the axis of the balloon, the electrode unit can uniformly release shock waves to the periphery, the shock waves received by all parts of the balloon are stable, the phenomenon that a certain side is larger and a certain side is smaller is avoided, the impact of the shock waves with required size on an area with treatment can be ensured, the stability of the treatment effect is ensured, the danger is not easy to occur, the treatment efficiency and the success rate are improved, the structure is simple, and the production is easy.
Drawings
FIG. 1 is a schematic structural view of a support member using a support cell in this embodiment;
FIG. 2 is a cross-sectional view of the inner catheter in this embodiment with the support member being a support balloon;
FIG. 3 is a schematic structural view of the supporting member of the present embodiment using a plurality of supporting bars;
FIG. 4 is a schematic view of an axial view of a balloon with a plurality of struts;
fig. 5 is a schematic structural view of the supporting members of the present embodiment when they are supporting bars and are arranged one by one.
In the above drawings: 1. a balloon; 2. an outer catheter; 3. an inner conduit; 31. a guidewire lumen; 32. filling the channel; 4. an operating handle; 41. balloon inflation; 42. a wire guide opening; 43. a connector; 44. the support cell fills the mouth; 45. a button; 46. an operating control member; 5. an electrode unit; 6. a support cell; 7. a support strip.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.
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, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, 3 and 5, a shock wave generation catheter comprises a catheter main body, a balloon 1 connected to the catheter main body, an electrode unit 5 and an operation handle 4, wherein a fluid medium is filled in the balloon 1, pulse voltage is provided for the electrode unit 5, and the electrode unit 5 can form cavitation bubbles in the fluid medium to form shock waves and can be used for treatment. The catheter main body comprises an inner catheter 3 and an outer catheter 2 sleeved outside the inner catheter 3, the far end of the inner catheter 3 extends out of the far end of the outer catheter 2, the inner catheter 3 is provided with a guide wire cavity 31, and a guide wire is arranged in the guide wire cavity 31 and used for guiding the catheter main body to move in a treatment area. The near end of the sacculus 1 is connected with the far end of the outer catheter 2, the far end of the sacculus 1 is connected with the inner catheter 3, the electrode unit 5 is arranged on the inner catheter 3 inside the sacculus 1, the operating handle 4 is connected with the near end of the catheter main body, the near ends of the inner catheter 3 and the outer catheter 2 are both connected with the operating handle 4, and the operating handle 4 is provided with a button 45 for controlling the operation of the shock wave generation catheter. When the saccule 1 is filled with fluid medium, the fluid medium is filled through the gap between the inner catheter 3 and the outer catheter 2, the saccule filling opening 41 arranged on the operating handle 4 is communicated with the gap between the inner catheter 3 and the outer catheter 2, the wire guiding opening 42 connected with the wire guiding cavity 31 and the connector 43 for externally connecting the part for controlling the discharge of the electrode unit 5 are also arranged on the operating handle 4.
The shock wave generation catheter also comprises a support part, the support part is partially or completely positioned inside the saccule 1, the part of the support part positioned inside the saccule 1 can be supported between the outer wall of the inner catheter 3 and the inner wall of the saccule 1, and when the support part is supported on the inner wall of the saccule 1, the support part keeps the inner catheter 3 on the axis of the saccule 1. The part of the support piece, which is positioned in the balloon 1, has an expansion state and a furled state, the support piece is supported on the inner wall of the balloon 1 in the expansion state, and the support piece can relatively fix the distance between the inner catheter 3 and the inner wall of the balloon 1, so that the inner catheter 3 is prevented from being bent in the balloon 1; the supporting piece is in a furled state, the supporting piece is furled on the outer wall of the inner catheter 3, the saccule 1 cannot be unfolded to the most unfolded state, the furled supporting piece can reduce the cross sectional area of the part of the saccule 1 in the shock wave generation catheter, and the shock wave generation catheter can conveniently pass through a narrow place. The supporting member has various forms, including a supporting bag 6 and a supporting strip 7, and any one of the supporting members can be selected from the balloon 1.
As shown in fig. 1 and 2, when the supporting member adopts the supporting bag 6, the supporting bag 6 is entirely arranged in the balloon 1, the inner catheter 3 passes through the middle of the supporting bag 6, the supporting bag 6 surrounds the circumferential surface of the inner catheter 3, the supporting bag 6 has a hollow inner cavity for filling with a fluid medium, the supporting bag 6 is in an expanded state, the hollow inner cavity of the supporting bag 6 is filled with the fluid medium, the balloon 1 is filled with the fluid medium before the supporting bag 6, then the supporting bag 6 is filled so as to expand, so that the outer wall of the supporting bag 6 is supported on the inner wall of the balloon 1, after two independent inner and outer balloon bags are filled with the fluid medium, the supporting bag 6 in the expanded state has a certain deformation resistance, so that the inner supporting bag 6 can effectively support the outer balloon 1, and when the supporting bag 6 is in a furled state, the inner bag is shriveled and attached to the outer wall of the inner catheter 3. The pipe main part is provided with the sufficient passageway 32 with the cavity inner chamber intercommunication of supporting bag 6, and sufficient passageway 32 sets up including in pipe 3, supporting bag 6 sets up including on pipe 3, and sufficient passageway 32 of supporting bag 6 sets up including convenient in pipe 3 to support bag 6 filling, can not add extra structure in sacculus 1. The filling channel 32 is arranged in the inner catheter 3, the inner catheter 3 is a multi-cavity tube and comprises a guide wire cavity 31 and a filling channel 32, the guide wire cavity 31 is matched with the guide wire in shape, namely the cross section is circular, the filling channel 32 can be in any shape and can be filled with medium fluid, and the operating handle 4 is provided with a filling opening 44 of the support bag 6 communicated with the filling channel 32.
As shown in fig. 3-5, when the supporting member is the supporting strip 7, the supporting strip 7 is partially located in the balloon 1, and both ends of the supporting strip are located in the inner catheter 3, the proximal end of the catheter main body is provided with an operating member 46 for operating the supporting strip 7 to switch between the expanded state and the collapsed state, and the operating member 46 is arranged on the operating handle 4. The inner catheter 3 between the two ends of the balloon 1 is provided with a support outlet and a support inlet, one end of the support strip 7 is connected to the operation control part 46, the other end of the support strip 7 penetrates through the inner catheter 3, penetrates out of the support outlet and penetrates through the support inlet, and then is connected to the far end of the inner catheter 3, the irrelevant part of the support strip 7 to the support balloon 1 is hidden in the inner catheter 3, the influence of other structures on the support strip can be avoided, and the transition between the expansion state and the folding state of the support strip is better controlled. The electrode unit 5 is disposed on the inner catheter 3 between the support outlets and the support inlets, and the support strips 7 may have a portion having a supporting effect between the support outlets and the support inlets, and the electrode unit 5 disposed outside this range may have a negative effect on the therapeutic effect of the inner catheter 3 due to eccentricity thereof. The support bar 7 adopts metal material, and metal material includes nickel titanium alloy, stainless steel, supports and has certain distance between export, the support entry, adopts metal material can make 7 rigidity of support bar stronger, can prolong the distance between the export of support, the support entry, plays better supporting effect. The balloon 1, the inner catheter 3 and the outer catheter 2 are made of a compliant material or a semi-compliant material, the compliant material comprises silica gel and PU, and the semi-compliant material comprises nylon and Pebax.
The balloon 1 is inflated by the fluid medium, then the control element 46 is controlled to switch the supporting strips 7 to the expanded state, so that the supporting strips 7 are supported on the inner wall of the balloon 1, the control element 46 adopts an adjusting rotating wheel, the proximal end of the supporting strips 7 can be pushed to move towards the distal end of the supporting strips 7 by rotating the adjusting rotating wheel, the proximal end parts of the supporting strips 7 can also be wound and retracted, and the adjusting rotating wheel is rotated to release the proximal end parts of the supporting strips 7, so that the length of the supporting strips 7 is increased. The other end of the support strip 7 is fixedly connected to the distal end of the inner catheter 3, when the control member 46 is operated to move the support strip 7 toward the distal end of the inner catheter 3, the portion of the support strip 7 located in the balloon 1 is changed from the collapsed state to the expanded state, the distal end of the support strip 7 is the advancing direction of the movement, the support strip 7 continues to extend forward from one side of the proximal end of the support strip 7, the distal end of the support strip 7 cannot advance, and the support strip 7 is forced to expand laterally, so that the support strip 7 enters the expanded state.
One or more support bars 7 may be provided.
As shown in fig. 3 and 4, when the support bars 7 are provided with a plurality of, a plurality of support bars 7 are located and support the export, support the part between the entry and distribute around 3 circumference of inner catheter, the support bar 7 is under the inflation state, the support bar 7 is located and supports the export, support the part between the entry and arch up to the direction of sacculus 1 inner wall and support on sacculus 1 inner wall, the side is seen to be the arc, support bar 7 through a plurality of archs, support a plurality of directions of 3 circumference of inner catheter, avoid appearing the atress inequality, set up at four support bars 7 in this embodiment, the contained angle between the adjacent support bar 7 is 90, support bar 7 can adopt the lamellar structure of rectangular shape, form skeleton texture when a plurality of support bars 7 are under the inflation state, similar rib. When the supporting strip 7 is in a furled state, the supporting strip 7 is straightened and attached to the outer wall surface of the inner conduit 3.
As shown in fig. 5, when the support bars 7 are provided with one, the support bars 7 adopt the shape memory technology, the shape is pre-shaped as required, the support bars 7 are positioned at the support outlet, the part between the support inlets extends along the axial spiral of the inner catheter 3, the support bars 7 are in the expansion state, the support bars 7 are positioned at the support outlet, the part between the support inlets keeps the spiral to extend and outwards expand to the support on the inner wall of the sacculus 1, the support bars 7 attached to the inner wall of the sacculus 1 can uniformly support all over the inner wall of the sacculus 1 by the spiral line, and the uneven stress is avoided. The supporting strip 7 is in a furled state, and the supporting strip 7 is spirally attached to the outer wall of the inner conduit 3.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (14)
1. A shock wave generation catheter, comprising a catheter main body, a balloon and an electrode unit, wherein the balloon is arranged at the far end of the catheter main body, the electrode unit is arranged on the catheter main body in the balloon, and the shock wave generation catheter is characterized in that: the shock wave generation catheter also comprises a support part, wherein the support part is at least partially positioned in the balloon, and the catheter main body is kept on the axis of the balloon when the support part is supported on the inner wall of the balloon.
2. The shock wave generating conduit according to claim 1, wherein: the part of the supporting piece positioned in the balloon has an expanded state and a furled state, the supporting piece is in the expanded state, and the supporting piece is supported on the inner wall of the balloon; the support member is in the collapsed state, and the support member is collapsed on the outer wall of the catheter main body.
3. The shock wave generating conduit according to claim 2, wherein: the support member comprises a support bag, the support bag is arranged in the balloon, the catheter main body penetrates through the support bag, the support bag is provided with a hollow inner cavity for filling with fluid medium, the catheter main body is provided with a filling channel communicated with the hollow inner cavity, the support bag is in the expansion state, the hollow inner cavity of the support bag is filled with the fluid medium, and the outer wall of the support bag is supported on the inner wall of the balloon.
4. The shock wave generating conduit according to claim 3, wherein: the supporting bag is provided with at least one, when the supporting bag is provided with a plurality of supporting bags, the supporting bags are distributed along the extending direction of the catheter main body, and the filling channel is respectively communicated with the supporting bags.
5. The shock wave generating conduit according to claim 4, wherein: the supporting bag is internally provided with one electrode unit.
6. The shock wave generating conduit according to claim 3, wherein: the supporting bag is made of a compliant material, and/or the balloon is made of a semi-compliant material, wherein the compliant material comprises silica gel and PU, and the semi-compliant material comprises nylon and Pebax.
7. The shock wave generating conduit according to claim 2, wherein: the supporting piece comprises a supporting strip, part of the supporting strip is positioned in the balloon, and the proximal end of the catheter main body is provided with an operating control piece; a support outlet and a support inlet are formed in the catheter main body between the two ends of the balloon, one end of the support strip is connected to the operating control piece, and the other end of the support strip penetrates through the catheter main body, penetrates out of the support outlet, penetrates through the support inlet and is connected to the far end of the catheter main body.
8. The shock wave generating conduit according to claim 7, wherein: the other end of the supporting strip is fixedly connected to the far end of the catheter main body, and when the control piece is operated to enable the supporting strip to move towards the far end of the catheter main body, the part, located in the balloon, of the supporting strip is converted from the folded state to the expanded state.
9. The shock wave generating conduit according to claim 7, wherein: the support strip be provided with a plurality ofly, a plurality ofly the support strip be located support export, support the part between the entry around catheter main part circumference distribute, the support strip be in inflation state under, the support strip be located support export, support the part between the entry to the direction arch of sacculus inner wall support on the sacculus inner wall.
10. The shock wave generating conduit according to claim 7, wherein: the support strip be provided with one, the support strip be located support export, support the part between the entry along the axial spiral of pipe main part extend, the support strip be in inflation state under, the support strip be located support export, support the part between the entry keep spiral extend and outwards strut to support on the sacculus inner wall.
11. The shock wave generating conduit according to claim 7, wherein: the electrode unit is arranged on the catheter main body between the support outlet and the support inlet.
12. The shock wave generating conduit according to claim 7, wherein: the shock wave generation catheter further comprises an operating handle, the operating handle is connected to the near end of the catheter main body, and the control piece is arranged on the operating handle.
13. The shock wave generating conduit according to claim 7, wherein: the support strip is made of metal materials, and the metal materials comprise nickel-titanium alloy and stainless steel.
14. The shock wave generating conduit according to claim 1, wherein: the catheter main body comprises an inner catheter and an outer catheter sleeved outside the inner catheter, the far end of the inner catheter extends out of the far end of the outer catheter, the near end of the balloon is connected with the far end of the outer catheter, the far end of the balloon is connected with the inner catheter, and the electrode unit is arranged on the inner catheter inside the balloon.
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| CN117159094A (en) * | 2023-11-02 | 2023-12-05 | 苏州中荟医疗科技有限公司 | Shock wave treatment catheter and equipment thereof |
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