CN112971914B - Intravascular perfusion shock wave lithotripsy catheter system - Google Patents
Intravascular perfusion shock wave lithotripsy catheter system Download PDFInfo
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- CN112971914B CN112971914B CN202110178462.2A CN202110178462A CN112971914B CN 112971914 B CN112971914 B CN 112971914B CN 202110178462 A CN202110178462 A CN 202110178462A CN 112971914 B CN112971914 B CN 112971914B
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B2017/22025—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement applying a shock wave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22062—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation to be filled with liquid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22065—Functions of balloons
- A61B2017/22069—Immobilising; Stabilising
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Abstract
The invention discloses a catheter system for intravascular perfusion shock wave lithotripsy, which belongs to the field of diagnosis; wherein the outer wall of the far side of the outer catheter is bonded with a low-hardness balloon; the inner catheter is arranged in the outer catheter, a near-end opening of the inner catheter is connected with a wire guide hole arranged on the side wall of the middle part of the outer catheter, and a far-end opening of the inner catheter is bonded with a far-end opening of the outer catheter; the inner conduit divides the outer conduit into an inner cavity and an outer cavity which are independent; a set of oxygen channel groups are arranged on the outer catheter outside the far-near end of the low-hardness balloon, and the oxygen channel groups enable the second cavity to be communicated with the outside of the outer catheter; each set of oxygen channel group is arranged in the same circumferential position of the outer conduit. The oxygen channel groups are arranged on the outer conduit in the same circumferential direction, so that the positions of the oxygen channel groups can be set as required, and the positions are more flexible; the problem that the perfusion hole groups which are arranged in a linear mode are shielded by the treatment catheter in the operation is solved, and the utilization efficiency of the oxygen channel group is higher.
Description
Technical Field
The invention belongs to the technical field of diagnosis, and particularly relates to a catheter system for intravascular perfusion shock wave lithotripsy.
Background
Percutaneous Coronary Intervention (PCI) usually involves delivering a treatment catheter (radiographic catheter) to the coronary artery orifice to be dilated, delivering a balloon of a corresponding size to the stenotic segment along a guide wire, and dilating with appropriate pressure and time according to the characteristics of the lesion, thereby achieving the purpose of relieving the arterial stenosis. Traditional treatment approaches include angioplasty or stent placement. For example, a physician may dilate a stenosis in an artery by placing an expandable balloon in the artery and applying pressure to the balloon. The physician may also place a stent as needed to reduce restenosis of the vessel. However, coronary calcified lesions increase the difficulty of interventional treatment, increase the incidence of immediate surgical complications and major adverse cardiovascular events in early and late stages. The reason for this is that calcified lesions are high-resistance lesions, and balloon dilatation requires very high pressure (sometimes up to 10 to 15 atm, even 30 atm). Such pressure will generally result in a significant increase in the probability of rebound stenosis, dissection, perforation, rupture of the vessel. Such surgical events are particularly severe in the case of eccentric calcified lesions, since the pressure of the balloon is acting on the soft tissue without calcification.
Intravascular shock wave lithotripsy is an effective means of destroying calcified lesions. The design and method of intravascular shock wave lithotripsy is described by Daniel Hawkins et al in U.S. patent No. US 2009/0312768a1 and the series of patents that follow. This shock wave lithotripsy uses a low durometer balloon, and low pressure (4 to 6 atmospheres gauge) is applied to adhere the balloon to the vessel wall. The electric arc is generated by applying a momentary high voltage to electrodes inside the balloon, and the shock wave accompanying expansion and collapse of bubbles generated by the electric arc can soften, crack or break up calcium deposits inside calcified lesions. The balloon inflation time during treatment is about 25 seconds to two minutes and 25 seconds. Such long-term blockage of blood flow may cause serious cardiac adverse events such as myocardial ischemia and hemodynamic disorders, which ultimately leads to irreversible damage to the myocardium and the occurrence of myocardial infarction. To avoid ischemia, the balloon may be temporarily deflated to restore blood supply. This inevitably lengthens the operation time.
The invention patent of Chinese patent application No. ZL 201510608471.5 discloses a double-cavity catheter with perfusion holes at two ends of a balloon, but the distance of the balloon extending out is not controllable when percutaneous coronary artery interventional therapy is carried out, so that the perfusion holes are often buried in normal saline or contrast medium of a treatment catheter (a radiographic catheter), and the blood circulation effect cannot be expected.
To solve the problems, the intravascular perfusion shock wave lithotripsy catheter system not only effectively avoids ischemia, but also ensures the material thickness and trunk strength of the opening of the catheter, avoids the opening from being extruded and deformed in the pushing process of the catheter, and achieves the effect of stable blood perfusion effect.
Disclosure of Invention
In view of the problems in the background art, the present invention provides an intravascular perfusion shock wave lithotripsy catheter system, comprising: the device comprises an outer catheter, a low-hardness balloon, an oxygen channel group, an inner catheter, a developing marking ring, a wire group and an electrode group, wherein a liquid flushing port is formed in the side wall of the proximal end of the outer catheter, the low-hardness balloon is arranged on the outer wall of the far side of the outer catheter, and a balloon punching hole is formed in the outer catheter in the low-hardness balloon area; the inner catheter is arranged in the outer catheter, a near-end opening of the inner catheter is connected with a wire guide hole arranged on the side wall of the middle part of the outer catheter, and a far-end opening of the inner catheter is connected with a far-end opening of the outer catheter;
the inner catheter divides the outer catheter into an inner cavity and an outer cavity which are independent, wherein the cavity in the inner catheter is a second cavity through which the vascular guide wire passes, the cavity between the inner catheter and the outer catheter is a first cavity, and an electrode group is arranged in the first cavity in the low-hardness balloon area; the distal end of the outer catheter is provided with a developing marking ring; the lead group is arranged in the outer guide pipe and penetrates through the first cavity to be connected with the electrode group;
a set of oxygen channel groups are arranged on the outer catheter outside the far-near end of the low-hardness balloon, and the oxygen channel groups enable the second cavity to be communicated with the outside of the outer catheter; each set of oxygen channel group is arranged in the same circumferential position of the outer conduit.
The shell of the near end of the outer catheter is connected with the shell of the connector of the interaction unit, the connector of the wire group is sequentially connected with the interaction unit and the engine through the connector, energy required by shock wave gravel provided by the engine is transmitted to the electrode group through the interaction unit, the connector and the wire group, and the electrode group excites electric arcs by utilizing high voltage between two electrodes so as to generate shock waves.
The number of the filling holes included in the oxygen channel group is 1-8, and the aperture of the filling holes is 0.1-0.3 mm.
The oxygen channel group is arranged on the outer catheter through the first cavity cushion layer, the outer sleeve C-shaped developing ring or the outer sleeve heat shrinkable tube.
The first cavity cushion layer is formed by the following steps: the first cavity on the inner side of the oxygen channel group is internally provided with cushion layer materials, cushion layer material through holes which are collinear with the axes of the filling holes are arranged at the corresponding positions of the cushion layer materials on the inner side of each filling hole, and inner conduit through holes which are collinear with the axes of the filling holes are arranged at the corresponding positions of the inner conduits on the inner side of the cushion layer materials.
The axial length of the bedding material is 2.5 mm and the circumferential coverage angle is 270 deg..
The first cavity cushion layer is formed by the following steps: the outer guide pipe near the oxygen channel group is bonded with the inner guide pipe to form a concave area, the outer guide pipe outside the oxygen channel group is provided with a C-shaped developing ring, and the corresponding position of the inner guide pipe inside each perfusion hole is provided with an inner guide pipe through hole with collinear perfusion hole axes; and developing ring holes with collinear filling hole axes are formed at corresponding positions of the C-shaped developing rings at the outer sides of the filling holes.
The axial length of the C-shaped developing ring is 2.5 millimeters, and the circumferential coverage angle is 270 degrees.
The first cavity cushion layer is formed by the following steps: the oxygen channel group is arranged on the outer guide pipe in a mode of sleeving the heat-shrinkable tube outside, the outer guide pipe and the inner guide pipe near the oxygen channel group are bonded to form a concave area, the heat-shrinkable tube is sleeved on the outer guide pipe outside the oxygen channel group, and the inner guide pipe through hole with collinear filling hole axes is formed in the corresponding position of the inner guide pipe inside each filling hole; and heat shrinkable tube holes with collinear filling hole axes are arranged at corresponding positions of the heat shrinkable tubes at the outer sides of the filling holes.
The axial length of the heat shrinkable tube is 3 mm.
The invention has the beneficial effects that:
1. the oxygen channel groups are arranged on the outer conduit in the same circumferential direction, so that the positions of the oxygen channel groups can be set as required, and the positions are more flexible; the problem that the perfusion hole groups which are arranged in a linear mode are shielded by the treatment catheter in the operation is solved, and the utilization efficiency of the oxygen channel group is higher.
2. The oxygen channel group is arranged by using different installation modes, so that the problem that the wall of the catheter near the balloon is bent due to weakened supporting force of the circumference where the hole group is located when a plurality of holes are formed in the same circumferential position is solved.
Drawings
FIG. 1 is a schematic sectional view of an embodiment 1 of an intravascular perfusion shock wave lithotripsy catheter system of the present invention in elevation;
FIG. 2 is a top view of example 1 of the present invention;
FIG. 3 is a schematic sectional view of example 1 of the present invention in front view in the vicinity of a low durometer balloon;
FIG. 4 is a schematic cross-sectional view of example 2 of the present invention in front view in the area near the low durometer balloon;
FIG. 5 is a cross-sectional view taken along line A-A' of FIG. 4;
FIG. 6 is a partial perspective view of an elevational view of the area near the low durometer balloon of example 2 of the present invention;
FIG. 7 is a schematic sectional view of example 3 of the present invention in front view in the vicinity of a low durometer balloon;
fig. 8 is a partial perspective view from above of the area near the low durometer balloon of example 3 of the present invention.
Wherein:
1-outer catheter, 2-low hardness balloon, 3-oxygen channel group, 4-inner catheter, 5-C-shaped development ring, 6-heat shrinkage pipe, 7-cushion material, 31-perfusion hole, 32-inner catheter through hole, 34-development ring hole, 35-heat shrinkage pipe hole, 36-cushion material through hole, 101-near end shell, 103-liquid flushing hole, 108-development marking ring, 109-interaction unit, 110-connector, 111-engine, 113-lead group, 114-electrode group, 201-first electrode, 202-second electrode, 207-discharge hole, 208-electrode discharge hole and 209-balloon punching hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the present invention shown in fig. 1 to 3 includes: the device comprises an outer catheter 1, a low-hardness balloon 2, an oxygen channel group 3, an inner catheter 4, a developing marking ring 108, an interaction unit 109, a connector 110, an engine 111, a wire group 113 and an electrode group 114, wherein the low-hardness balloon 2 is fixed on the outer wall of the far side of the outer catheter 1, a balloon punching hole 209 is formed in the outer catheter 1 in the area of the low-hardness balloon 2, and conductive liquid injected into the balloon enters the low-hardness balloon 2 from a first inner cavity through the balloon punching hole 209;
the inner catheter 4 is arranged in the outer catheter 1, the proximal opening of the inner catheter 4 is connected with a wire guide hole 115 arranged on the side wall of the middle part of the outer catheter 1, and the distal opening of the inner catheter 4 is fixed with the distal opening of the outer catheter 1; the inner catheter 4 divides the outer catheter 1 into an inner cavity and an outer cavity which are independent, wherein the inner cavity of the inner catheter 4 is a second cavity for the blood vessel guide wire to pass through, the cavity between the inner catheter 4 and the outer catheter 1 is a first cavity, and at least one electrode group 114 is arranged in the first cavity in the area of the low-hardness balloon 2; the distal end of the outer catheter 1 is provided with a developing mark ring 108;
a set of oxygen channel group 3 is arranged on the outer catheter 1 outside the far and near ends of the low-hardness balloon 2, the oxygen channel group 3 enables the second cavity to be communicated with the outside of the outer catheter 1, and a small amount of blood can enter the inner catheter 4 from the oxygen channel group 3 at the near end and flow back into the blood vessel from the oxygen channel group 3 at the far end or the far end opening of the inner catheter 4 at the far end when the balloon is expanded; the second cavity is a blood perfusion cavity at the same time, so that a small amount of blood can flow from the near end to the far end of the saccule to supply oxygen to the myocardial tissue at the far end of the focus when the shock wave treatment is carried out;
the oxygen channel group 3 comprises more than one perfusion holes 31, when the number of the perfusion holes 31 is more than one, the axes of the perfusion holes 31 are all positioned in the same diameter plane, namely, each set of oxygen channel group 3 is arranged in a certain circumferential position of the outer catheter 1; the oxygen channel group 3 is arranged on the outer catheter 1 in a mode of a first cavity cushion layer, a C-shaped developing ring or a heat shrinkable tube;
a liquid flushing port 103 is formed in the side wall of the proximal end of the outer catheter 1, a proximal shell 101 of the proximal end of the outer catheter 1 is connected with a shell of a joint 110 of the interaction unit 109, a joint of a lead group 113 is sequentially connected with the interaction unit 109 and an engine 111 through the joint 110, and the lead group 113 is installed in the outer catheter 1 and penetrates through a first cavity to be connected with an electrode group 114; the energy required for breaking the stone with the shock wave supplied from the engine 111 is transmitted to the electrode group 114 through the interactive unit 109, the connector 110 and the wire group 113, and the electrode group 114 excites the arc with a high voltage between both electrodes to generate the shock wave.
In this embodiment, during the blood vessel advancing, the cross section of the balloon at the electrode 201 when folded is the largest cross section, and the diameter thereof is 1 mm to 1.5 mm; the diameter of the balloon after expansion is 2 mm to 4 mm, and the length is 10 mm to 15 mm; the second lumen inside the inner catheter 2 is compatible with a 0.356 mm guidewire.
In the present embodiment, the distance between the oxygen channel group 3 and the low-durometer balloon 2 is not more than 15 mm, and preferably not more than 3 mm; thereby ensuring that the proximal oxygen channel set 3 is outside the PCI surgical guide catheter and exposed to blood.
In this embodiment, the guidewire port 115 is located 25 cm from the distal tip of the outer catheter 1 and is typically located inside the guiding catheter during PCI surgery and is not exposed to blood.
In this embodiment, the pressure of the conductive liquid entering the low-hardness balloon 2 is between three and ten standard atmospheric pressures, and the conductive liquid is physiological saline, which enables the electrode group 114 to stably emit an electric arc; the choice of the conductive liquid can be chosen according to the requirements of the imaging technique, such as 1: 1 volume ratio of physiological saline and angiographic fluid; when the conductive liquid is injected into the liquid flushing port 103, the air in the low-hardness balloon 2 can be discharged in advance, and the balloon can be expanded to a certain diameter.
In this embodiment, the interaction unit 109 is a relay device with a small volume and mass, which can be integrated into the engine 111 of the catheter system.
In the present embodiment, the number of the electrode groups 114 is two; it is readily understood that no more than four electrode sets 114 may be installed at intervals, depending on the balloon inflation lumen and voltage requirements; and the electrode set 114 provides a high voltage having a magnitude between 500 and 10000 volts, the high voltage having a duration between 0.05 and 5 microseconds.
As shown in fig. 3, the electrode group 114 is mounted around and fixed on the sidewall of the outer catheter 1, the electrode group 114 is composed of a first electrode 201 and a second electrode 202, wherein the first electrode 201 mounted on the outer side of the outer catheter 1 and the second electrode 202 mounted on the inner side of the outer catheter 1 are a pair of discharge electrodes, the first electrode 201 and the second electrode 202 are both connected to the lead group 113, the first electrode 201 is provided with a discharge hole 207, a corresponding position of the second electrode 202 is provided with a protrusion (not shown), and a corresponding position of the outer catheter 1 is provided with an electrode discharge hole 208; the conductive material at the location of the pair of grooves and protrusions, first electrode 201 and second electrode 202, are exposed to the conductive liquid of low durometer balloon 2, sufficiently close to but not touching to form a spark gap; this spark gap can produce an arc discharge when a high voltage is applied to the electrodes; the water in the vicinity of the spark gap on the outer catheter 1 is vaporized in a very short time to form a steam bubble which rapidly expands and collapses, and the expansion and collapse process forms the diffusion of the mechanical shock wave to the surroundings.
As shown in fig. 3, in embodiment 1 of the present invention, the oxygen channel group 3 is disposed on the outer catheter 1 by way of a first cavity cushion, the cushion material 7 is disposed in the first cavity inside the oxygen channel group 3, a cushion material through hole 36 collinear with the axis of the infusion hole 31 is opened at a position corresponding to the cushion material 7 inside each infusion hole 31, and an inner catheter through hole 32 collinear with the axis of the infusion hole 31 is opened at a position corresponding to the inner catheter 4 inside the cushion material 7;
in this embodiment, the two sets of oxygen channel groups 3 each include three perfusion holes 31, the aperture of the perfusion hole 31 is 0.1 mm to 0.3 mm, and the size of the inner conduit through hole 32 is equal to that of the perfusion hole 31; meanwhile, the number of the perfusion holes 31 is less than 8 so as to ensure the axial pushing strength of the guide pipe;
in this example, the shim material was PEBAX resin, the axial length of the shim material was 2.5 millimeters, and the circumferential coverage angle was 270 °.
In the assembly of this embodiment, a cushion material is added to the outside of the inner catheter 4 and then fused with the outer catheter 1. The cross sections of the inner catheter and the outer catheter are basically unchanged, specifically, a cushion material 7 is firstly bonded on the inner catheter 4, then the inner catheter 4 is pushed into the corresponding position in the outer catheter 1, the cushion material 7 is fused through hot melting or laser, and finally an inner catheter through hole 32 and an infusion hole 31 are drilled; the bonding is by means of an adhesive or alternatively by means of hot melt.
When in use, the utility model is used for cleaning the inner wall of the tank,
firstly, the radiographic catheter (treatment catheter) is pushed to the proximal end of a target position (lesion position), then the guide wire is pushed, the head end of the guide wire crosses the target position to reach the distal end of the target position, then the inner catheter 4 of the catheter of the embodiment is sleeved on the proximal end of the guide wire, and the low-hardness balloon 2 is pushed to the target position along the guide wire and stopped.
Then the conductive liquid is injected through the liquid flushing port 103 and the low-durometer balloon 2 is expanded.
Finally, the set of electrodes 114 is energized and subjected to intravascular shock wave lithotripsy, which may be performed as a set of ten pulses to emit shock waves in a particular region of the target site. After each set of pulses is completed, the next set of pulses or position adjustment may continue in situ, and after 1 to 8 sets of pulses have been performed, the low durometer balloon 2 may be deflated and the outer catheter 1 retracted. During the pulse before the deflation of the low durometer balloon 2, the oxygen channel set 3 achieves a blood supply to the distal coronary end while ensuring the strength of the outer catheter 1 with the electrode set 114.
in embodiment 2, the oxygen channel group 3 is set on the outer catheter 1 by way of externally covering the C-shaped developing ring, the outer catheter 1 near the oxygen channel group 3 is bonded with the inner catheter 4 to form a concave area, the C-shaped developing ring 5 is installed on the outer catheter 1 outside the oxygen channel group 3, and the inner catheter through hole 32 with collinear axes of the perfusion holes 31 is opened at the corresponding position of the inner catheter 4 inside each perfusion hole 31; developing ring holes 34 with collinear axes of the filling holes 31 are formed at corresponding positions of the C-shaped developing rings 5 at the outer sides of the filling holes 31; because the depressed area formed by bonding the outer catheter 1 and the inner catheter 4 is only positioned on a part of the circumference of the tube wall of the outer catheter 1 and is slightly larger than the size of the C-shaped developing ring 5, the perfusion blood flow can enter the second cavity through the developing ring hole 34, the perfusion hole 31 and the inner catheter through hole 32 and can not enter the balloon punching cavity or the first cavity inside the low-hardness balloon 2.
The recessed region is located near the oxygen channel group 3, so that a first cavity communicating the distal and proximal ends to allow the lead group 113 to pass therethrough is still present in the circumferential region between the outer catheter 1 and the inner catheter 4 except for the recessed region (the region covered by the C-shaped development ring 5).
In this embodiment, the two sets of oxygen channel groups 3 at the near end and the far end comprise three perfusion holes 31, the aperture of the perfusion hole 31 is 0.1 mm-0.3 mm, and the apertures of the inner conduit through hole 32 and the perfusion hole 31 are equal;
in the present embodiment, the axial length of the C-shaped developing ring 5 is 2.5 mm, and the circumferential coverage angle is 270 °.
In the assembly of the embodiment, the outer catheter 1 and the inner catheter 4 are bonded together, and then the bonded part is sleeved with a C-shaped developing ring, so that the pushability can be ensured. The holes of the C-shaped developing ring are punched in advance. After the outer catheter is sleeved, the whole outer catheter periphery is not sleeved, but the fastening can be ensured. Therefore, the developing ring can be prevented from excessively compressing the sleeve, and the sleeve can be thermally melted for further fixation after being fastened; the bonding is by means of an adhesive or alternatively by means of hot melt.
in embodiment 3, the oxygen channel group 3 is set on the outer catheter 1 by means of sheathing a heat shrink tube, the outer catheter 1 near the oxygen channel group 3 is bonded with the inner catheter 4 to form a concave area, the outer catheter 1 outside the oxygen channel group 3 is sheathed with the heat shrink tube 6, and the inner catheter through hole 32 with collinear axes of the perfusion holes 31 is formed at the corresponding position of the inner catheter 4 inside each perfusion hole 31; the corresponding position of the heat shrinkable tube 6 at the outer side of each perfusion hole 31 is provided with a heat shrinkable tube hole 35 with collinear axes of the perfusion holes 31; because the concave area formed by bonding the outer catheter 1 and the inner catheter 4 is only positioned on a part of the circumference of the tube wall of the outer catheter 1, perfusion blood can enter the second cavity through the heat-shrinkable tube hole 35, the perfusion hole 31 and the inner catheter through hole 32 and can not enter the balloon punching cavity or the first cavity inside the low-hardness balloon 2.
The recessed region is located adjacent to the oxygen channel set 3, so that there is still a first lumen communicating the distal and proximal ends in a circumferential region between the outer catheter 1 and the inner catheter 4 outside the recessed region to allow passage of the lead set 113.
In the embodiment, the two sets of oxygen channel groups 3 at the near end and the far end respectively comprise three perfusion holes 31, the aperture of each perfusion hole 31 is 0.1 mm-0.3 mm, and the apertures of the inner conduit through hole 32 and the perfusion holes 31 are equal;
in the present embodiment, the heat shrinkable tube 6 has an axial length of 3 mm;
during assembly in the embodiment, the outer catheter 1 and the inner catheter 4 are firstly bonded in the area near the oxygen channel group 3, then the heat shrinkable tube 6 is sleeved on the outside of the bonding part to ensure the pushability of the outer catheter 1, and then the heat shrinkable tube is fixed in a bonding mode; the bonding is by means of an adhesive or alternatively by means of hot melt.
Claims (4)
1. An intravascular perfusion shock wave lithotripsy catheter system comprising: the device comprises an outer catheter (1), a low-hardness balloon (2), an oxygen channel group (3), an inner catheter (4), a developing marking ring (108), a lead group (113) and an electrode group (114), wherein a liquid flushing port (103) is formed in the side wall of the proximal end of the outer catheter (1), the outer wall of the far side of the outer catheter (1) is provided with the low-hardness balloon (2), and a balloon punching hole (209) is formed in the outer catheter (1) in the area of the low-hardness balloon (2); the inner catheter (4) is arranged in the outer catheter (1), the opening at the near end of the inner catheter (4) is connected with a wire guide hole (115) arranged on the side wall of the middle part of the outer catheter (1), and the opening at the far end of the inner catheter (4) is connected with the opening at the far end of the outer catheter (1); the inner catheter (4) divides the outer catheter (1) into an inner cavity and an outer cavity which are independent, wherein the inner cavity of the inner catheter (4) is a second cavity for the blood vessel guide wire to pass through, the cavity between the inner catheter (4) and the outer catheter (1) is a first cavity, and an electrode group (114) is arranged in the first cavity in the area of the low-hardness balloon (2); the distal end of the outer catheter (1) is provided with a developing marking ring (108); the lead group (113) is arranged in the outer catheter (1) and passes through the first cavity to be connected with the electrode group (114); a set of oxygen channel group (3) is arranged on the outer catheter (1) outside the far end and the near end of the low-hardness balloon (2), and the oxygen channel group (3) enables the second cavity to be communicated with the outside of the outer catheter (1); it is characterized in that each set of oxygen channel group (3) is arranged in the same circumferential position of the outer conduit (1);
the oxygen channel group (3) is arranged on the outer catheter (1) in a mode of externally sleeving a C-shaped developing ring; the mode of the outer sleeve C-shaped developing ring is as follows: an outer catheter (1) near an oxygen channel group (3) is bonded with an inner catheter (4) to form a concave area, a C-shaped developing ring (5) is installed on the outer catheter (1) outside the oxygen channel group (3), the oxygen channel group (3) comprises filling holes (31), and inner catheter through holes (32) with collinear axes of the filling holes (31) are formed in corresponding positions of the inner catheter (4) inside each filling hole (31); developing ring holes (34) with collinear axes of the pouring holes (31) are formed at corresponding positions of the C-shaped developing rings (5) at the outer sides of the pouring holes (31); the circumferential coverage angle of the C-shaped developing ring (5) is 270 degrees, and the distance between the oxygen channel group (3) and the low-hardness balloon (2) is not more than 15 millimeters;
during assembly, the outer catheter (1) and the inner catheter (4) are firstly bonded, and then a C-shaped developing ring is sleeved on the bonded part to ensure pushability; the hole of the C-shaped developing ring is drilled in advance, and the C-shaped developing ring is sleeved on the outer catheter and does not sleeve the whole outer catheter periphery, but the C-shaped developing ring is fastened.
2. An intravascular perfusion shock wave lithotripsy catheter system according to claim 1, wherein the proximal housing (101) at the proximal end of the outer catheter (1) is connected to the housing of the connector (110) of the interaction unit (109), the connector of the wire set (113) is connected to the interaction unit (109) and the engine (111) in sequence via the connector (110), the energy required for shock wave lithotripsy provided by the engine (111) is transmitted to the electrode set (114) via the interaction unit (109), the connector (110) and the wire set (113), and the electrode set (114) uses the high voltage between the two electrodes to excite the electric arc to generate the shock wave.
3. The intravascular perfusion shock wave lithotripsy catheter system of claim 1, wherein the number of perfusion holes (31) included in the oxygen channel set (3) is 1-8, and the diameter of the perfusion holes (31) is 0.1-0.3 mm.
4. An endovascular perfusion shock wave lithotripsy catheter system according to claim 1, wherein the C-shaped visualization ring (5) has an axial length of 2.5 mm.
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| CN113288335A (en) * | 2021-06-24 | 2021-08-24 | 苏州中荟医疗科技有限公司 | Shock wave guide tube and shock wave generation system |
| CN113633346B (en) * | 2021-08-31 | 2024-05-03 | 苏州中荟医疗科技有限公司 | Electrode device and shock wave generation system |
| CN117838247A (en) * | 2021-11-09 | 2024-04-09 | 上海蓝帆博元医疗科技有限公司 | Shock wave electrode assembly, balloon catheter device and medical equipment |
| CN114305652A (en) * | 2021-12-09 | 2022-04-12 | 深圳先进技术研究院 | Micropore electrode for blood vessel calcification breaking treatment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109303586A (en) * | 2017-07-26 | 2019-02-05 | 波士顿科学国际有限公司 | Blast wave generating apparatus |
| CN111601560A (en) * | 2017-11-17 | 2020-08-28 | 冲击波医疗公司 | Low profile electrode for a shock waveguide |
| CN111714756A (en) * | 2020-04-28 | 2020-09-29 | 鼎科医疗技术（苏州）有限公司 | Balloon dilatation catheter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6796926B2 (en) * | 2013-01-15 | 2020-12-09 | エー．ヴィー． メディカル テクノロジーズ リミテッドＡ．Ｖ． Ｍｅｄｉｃａｌ Ｔｅｃｈｎｏｌｏｇｉｅｓ， Ｌｔｄ． | Infusion catheter with guide wire valve |
| KR20180021818A (en) * | 2015-06-25 | 2018-03-05 | 에이.브이. 메디컬 테크놀로지스 리미티드 | A balloon catheter with an enhanced proximal infusion outlet port and its manufacture |
| US11006996B2 (en) * | 2018-01-16 | 2021-05-18 | Daniel Ezra Walzman | Torus balloon with energy emitters for intravascular lithotripsy |
-
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- 2021-02-09 CN CN202110178462.2A patent/CN112971914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109303586A (en) * | 2017-07-26 | 2019-02-05 | 波士顿科学国际有限公司 | Blast wave generating apparatus |
| CN111601560A (en) * | 2017-11-17 | 2020-08-28 | 冲击波医疗公司 | Low profile electrode for a shock waveguide |
| CN111714756A (en) * | 2020-04-28 | 2020-09-29 | 鼎科医疗技术（苏州）有限公司 | Balloon dilatation catheter |
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