CN114144131A - Rotary grinding device for calcified lesion in blood vessel - Google Patents
Rotary grinding device for calcified lesion in blood vessel Download PDFInfo
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- CN114144131A CN114144131A CN202080007853.1A CN202080007853A CN114144131A CN 114144131 A CN114144131 A CN 114144131A CN 202080007853 A CN202080007853 A CN 202080007853A CN 114144131 A CN114144131 A CN 114144131A
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- grinding head
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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
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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
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
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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
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00539—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated hydraulically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00553—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated using a turbine
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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
- A61B17/32—Surgical cutting instruments
- A61B2017/320004—Surgical cutting instruments abrasive
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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
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B2017/320741—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
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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
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
- A61B2017/320766—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven eccentric
Abstract
The invention discloses rotational grinding equipment for calcified lesions in blood vessels, which aims to improve the safety of operations and reduce the cost. The invention adopts the following technical scheme: the utility model provides an endovascular calcification pathological change grinds equipment soon, is equipped with the bistrique that grinds soon which characterized in that: the rotary grinding head is driven to rotate by a water pump through a water turbine. Compared with the prior art, the invention adopts high-pressure liquid to impact the water wheel to convert the liquid kinetic energy into the water wheel rotational mechanical energy, drives the transmission accelerating mechanism to realize the rotation of the rotational grinding head, is used for dredging or improving severe calcified or fibrotic atherosclerotic lesions in the periphery of a human body and coronary vessels, has low high-speed rotational transmission noise of the rotational grinding head, reduces the friction heat which is caused by the rotational grinding and is retained in the human body, reduces the amount of cooling and lubricating solution which is input into the human body, reduces the metabolic burden of the kidney of the human body, and has the advantages of safety, reliability, simple structure and low cost.
Description
Technical Field
The invention relates to a medical instrument, in particular to a device for interventional therapy of coronary artery calcification lesion.
Technical Field
Rotational atherectomy (Rotational atherectomy) is an indispensable procedure for percutaneous coronary intervention PCI to successfully complete the procedure in the case of some special lesions, such as severe calcified lesions. The method is a clinically useful interventional therapy means for severe stenosis, severe calcification or fibrosis. In the prior art, a rotational grinding device is adopted, and a diamond grinding head which is inserted into a coronary artery of a human body and rotates at a high speed is utilized to rotationally grind pathological changes in the artery so as to dredge the seriously occluded coronary artery. One of them is to rotate a diamond grinding head by using a high-speed motor drive, and the representative product is a CSI Diaminoback 360 Coronary Orbital analysis System. The other is to convert the gas kinetic energy into the rotating mechanical energy of the diamond grinding head by utilizing high-pressure gas transmission, and the represented product is Boston science Rotablatato.
The two types of rotary grinding equipment simultaneously have the following defects:
1. the diamond grinding head and the grinding head carrier can generate a large amount of heat when rotating at a high speed in a human body, and a series of complications of a patient, such as vasospasm, acute thrombosis and acute myocardial infarction, can be possibly caused;
2. in the using process, a large amount of lubricating cooling liquid solution is input into the human artery, so that a large burden is brought to the renal function of a human body;
3. the driving motor and the high-pressure gas can generate huge noise in the using process;
4. the residual particles generated after the rotational grinding of the rotational grinding head in the process of rotational grinding of the lesion can flow into the far-end position of the vascular lesion through the flushing of blood and lubricating liquid.
The two types of rotary grinding equipment respectively have the following defects:
1. the structure of the diamond grinding head is driven by a motor, and the structure is difficult to effectively dredge aiming at the pathological changes of forward narrow large-area obstruction (blockage) in the rotational grinding blood vessel; a plurality of control signals are needed to control the motor, so that the motor is easy to interfere wirelessly; the motor control board needs the battery power supply, and the battery has the risk of effective electric quantity storage time.
2. The high-pressure gas transmission, the structural shape of the diamond grinding head is not suitable for improving unilateral calcification lesion of the vascular wall and bifurcation calcification lesion of the vascular wall; the whole equipment is large in size and complex in connection.
Disclosure of Invention
The invention aims to provide a rotary grinding device for calcified lesions in blood vessels, which aims to improve the safety of operations and reduce the cost.
The invention adopts the following technical scheme: the utility model provides an endovascular calcification pathological change grinds equipment soon, is equipped with the bistrique that grinds soon which characterized in that: the rotary grinding head is driven to rotate by a water pump through a water turbine.
The water pump is a constant-pressure water pump, the constant-pressure water pump is connected with a rotary grinding head through a water flow control valve and a water turbine, the output liquid pressure of the constant-pressure water pump is not lower than 50Mpa, the rotating speed of the rotary grinding head is 70000-150000 rad/min, the output liquid flow of the water flow control valve is adjusted, and the rotating speed of the rotary grinding head is controlled to be a certain value of 70000-150000 rad/min.
The water turbine of the invention is formed by connecting a water wheel and a transmission accelerating mechanism.
The water wheel, the transmission accelerating mechanism and the rotary grinding head are coaxially connected.
The water wheel is provided with a shell component, and a water wheel rotor is coaxially arranged in the shell component; the inner diameter of a cylinder of the shell component is 16-30 mm, the outer diameter of the cylinder of the shell component is 18-34 mm, the middle part of the cylinder is radially connected with another two cylinders with the diameter smaller than that of the cylinder, the two cylinders are respectively a water inlet and a water outlet, and the axes of the water inlet and the water outlet are vertical to the axis of the cylinder and are distributed at 30-60 degrees; the water wheel rotor is provided with a central shaft, a through hole is formed along the axis of the central shaft, and at least two blades are connected to the central shaft.
The transmission acceleration mechanism is formed by connecting a first-order planetary acceleration gear mechanism and a second-order planetary acceleration gear mechanism.
The rotary grinding head is provided with a hexagonal hollow shaft, one end of the hexagonal hollow shaft and an output shaft of a second-order planetary accelerating gear mechanism form a detachable connecting structure, the other end of the hexagonal hollow shaft is connected with one end of a rotary grinding wire winding pipe, the other end of the rotary grinding wire winding pipe is sleeved with the rotary grinding head, and the rotary grinding wire winding pipe extends out of the rotary grinding head.
The axial section of the rotary grinding head is in a gourd shape, the small end of the gourd shape faces to the far end, and the axis of the rotary grinding wire winding pipe is superposed with the axis of the rotary grinding head.
The axial section of the rotary grinding head is in a shape formed by combining a trapezoid and a rectangle, the lower bottom of the trapezoid is superposed with the long side of the rectangle, the axial section of a rotary grinding winding pipe is superposed with the rectangle, and the outer edge of the upper part of the axial section of the rotary grinding winding pipe is superposed with the lower bottom of the trapezoid of the rotary grinding head, so that the eccentric rotary grinding head is formed.
The far end of the axial section of the rotary grinding head is in a gourd-shaped small end shape, the axis of a rotary grinding wire winding pipe is superposed with the axis of the gourd shape, the larger outer diameter of the gourd-shaped small end is taken as a small end, a first conical shape extends towards the near end along the axial direction, the large end of the first conical shape extends into a cylindrical shape, the outer diameter of the cylindrical shape is taken as a large end, a second conical shape extends along the near end, the small end of the second circular shape is taken as a large end of a third conical shape, the third conical shape extends along the near end, the length of the cylindrical shape is smaller than the axial length of the first conical shape, and the lower part of the axial section of the rotary grinding head is cut off along the axial direction, so that the outer edge of the lower part of the rotary grinding head is the same as the outer diameter of the small end of the first conical shape, and the large end of the third conical shape forms an eccentric rotary grinding head.
Compared with the prior art, the invention adopts high-pressure liquid to impact the water wheel to convert the liquid kinetic energy into the water wheel rotational mechanical energy, drives the transmission accelerating mechanism to realize the rotation of the rotational grinding head, is used for dredging or improving severe calcified or fibrotic atherosclerotic lesions in the periphery of a human body and coronary vessels, has low high-speed rotational transmission noise of the rotational grinding head, reduces the friction heat which is caused by the rotational grinding and is retained in the human body, reduces the amount of cooling and lubricating solution which is input into the human body, reduces the metabolic burden of the kidney of the human body, and has the advantages of safety, reliability, simple structure and low cost.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is an exploded view of the turbine according to the present invention.
Fig. 3 is an exploded view of the transmission accelerating mechanism of the present invention.
Fig. 4 is an exploded view of the water wheel according to the present invention.
Fig. 5 is an outline view of the water turbine of the present invention.
Fig. 6 is a schematic view of the structure of the water turbine of the present invention in an axial section.
Fig. 7 is an exploded view of the turbine components of the present invention.
Fig. 8 is a schematic view of the axial sectional structure of the water wheel of the present invention.
Fig. 9 is a schematic axial sectional structure of the transmission accelerating mechanism of the invention.
Fig. 10 is a schematic view of the structure of the rotational grinding head of the present invention.
FIG. 11 is a schematic view of a convolutely abrasive filament winding configuration of the present invention.
FIG. 12 is a schematic axial cross-sectional view of a convolutely abrasive filament winding tube of the present invention.
FIG. 13 is a cross-sectional view of a convolutely abrasive filament winding tube of the present invention.
FIG. 14 is a schematic view of a rotary grinding head structure according to the present invention.
Fig. 15 is a schematic view of the head structure of the rotary grinder of the present invention (ii).
Fig. 16 is a schematic view (iii) of the head structure of the rotary grinder of the present invention.
Fig. 17 is a schematic view of the distribution of the water inlet and outlet of the housing assembly of the present invention.
FIG. 18 is a right side view of FIG. 17
Fig. 19 is a schematic view of the configuration of the hydro-rotor according to the present invention.
Fig. 20 is a left side view of fig. 19.
Fig. 21 is a schematic view of the installation position of the water wheel of the present invention.
Fig. 22 is a left side view of fig. 21.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The rotational grinding equipment for the calcified lesion in the blood vessel adopts high-pressure liquid to impact a water wheel to convert kinetic energy into mechanical energy for the water wheel to rotate, and the rotating water wheel drives a transmission accelerating mechanism, so that the rotating speed of a speed-adjustable rotational grinding head is enabled to dredge or improve severe calcified or fibrotic atherosclerotic lesions which are seriously narrow in the periphery of a human body and coronary vessels.
As shown in figure 1, the rotational grinding device for the endovascular calcification lesion is provided with a constant pressure water pump, a water flow control valve, a water turbine and a rotational grinding head which are connected in sequence from a near end to a far end, wherein the water turbine is formed by connecting a water wheel and a transmission accelerating mechanism.
The pressure of output liquid (water) of the constant pressure water pump is not lower than 50Mpa, and the rotating speed of the rotary grinding head is 70000-150000 rad/min. An operator controls the size of the water outlet of the water flow control valve by adjusting the diameter of the output port of the water flow control valve according to the liquid pressure output by the constant-pressure water pump and the rotating speed of the rotary grinding head required by the operation, so that the output liquid flow of the water flow control valve is adjusted, and the rotating speed of the rotary grinding head is controlled to be a certain proper value in 70000-150000 rad/min.
As shown in fig. 2, 3, 4 and 5, the water turbine is formed by connecting a water wheel (shown in the right part of fig. 2, and shown in fig. 4 and 5) and a transmission acceleration mechanism (shown in the left part of fig. 2 and shown in fig. 3).
As shown in fig. 6 and 7, the water wheel, the transmission accelerating mechanism and the rotary grinding head are coaxially connected.
As shown in fig. 8, the water wheel is provided with a shell component 2, and a water wheel rotor 1 is coaxially arranged in the shell component 2.
The shell component 2 is provided with a cylinder, the middle part of the cylinder is connected with another two cylinders with the diameter smaller than that of the cylinder along the radial direction, and the two cylinders are respectively a water inlet and a water outlet, as shown in fig. 17 and 18, the axes of the water inlet and the water outlet are vertical to the axis of the cylinder and are distributed at an angle of 30-60 degrees.
In this embodiment, the inner diameter of the cylinder is selected from 16 to 30mm, the outer diameter is selected from 18 to 34mm, and the water inlet and the water outlet are arranged at the middle position of the cylinder along the axis direction.
The water wheel rotor 1 is provided with a central shaft, and a through hole is formed along the axis of the central shaft. The central shaft is connected with at least two blades, the hydraulic rotor 1 is arranged in the shell component 2, and the axis of the central shaft of the hydraulic rotor 1 is coaxial with the axis of the cylinder of the shell component 2.
As shown in fig. 19 and 20, in the present embodiment, the blades are four, and the cross section thereof is L-shaped and made of stainless steel. The short sides of the L-shaped blades are respectively connected with the central shaft along the axial direction of the central shaft, and the L-shaped blades are uniformly distributed on the central shaft along the circumferential direction and face the same direction. The maximum outer diameter of the hydraulic turbine rotor 1 can be selected to be 15.8-29.8 mm according to different cylinder inner diameters, the blade height (the maximum outer diameter value of the hydraulic turbine rotor-the central shaft outer diameter)/2 is 3.7mm, the blade length is 13mm, the central shaft length is 15mm, the arc length (the long edge of the L-shaped blade) of the maximum outer diameter of the hydraulic turbine rotor 1 is 2mm, the blade thickness is gradually thinned from the end part of the L-shaped short edge to the end part of the L-shaped long edge, and the blade thickness is 1.85 mm-0.9 mm.
As shown in fig. 21 and 22, the water wheel rotor 1 is installed in the housing assembly 2, the difference between the maximum outer diameter of the water wheel rotor 1 and the inner diameter of the housing assembly 2 is 0.2mm, the water wheel rotor 1 is located at the central position of the housing assembly 2, and the structure can prevent the liquid cavitation phenomenon caused by the rotation of the water wheel rotor 1 in the housing assembly 2.
The two ends of the central shaft of the water wheel rotor 1 are supported in the holes of an annular bearing assembly 5, the bearing assembly 5 is arranged in the cylinder of the shell assembly 2 through a bearing pressure plate 4, the bearing pressure plate 4 is in a cover shape with an open end face, and the end part of the cover faces to the blade. The cover end of the bearing pressure plate 4 is provided with an annular sealing diaphragm 3. An annular sealing groove is formed in the outer edge of the water wheel rotor 1 near the two end portions of the central shaft along the circumferential direction, and an annular waterproof rubber ring 8 is embedded into the sealing groove. The two groups of sealing partition plates 3, the bearing pressing plate 4, the bearing assembly 5, the waterproof rubber ring 8 and the shell assembly 2 form a sealing cavity, the sealing cavity is a rotating area of the water wheel rotor 1, and the sealing cavity enables the water wheel rotor 1 to drive the central shaft to rotate when pressurized liquid erodes the blades.
Two ends of the water wheel rotor 1 are provided with an annular pressing plate 6 and a circular bottom plate 7 to form the whole structure of the water wheel. The inner hole of the cylinder of the shell component 2, which is positioned outside the pressure plate 6, is an internal thread and is used for being in threaded connection with the planet carrier gear component 11.
When the water wheel works, pressure liquid flows in from the water inlet, and flows out from the water outlet after the blades are washed. The water outlet size of the water flow control valve is adjusted and controlled, the water flow can be adjusted, and the rotating speed of the central shaft of the water wheel rotor 1 is controlled.
As shown in fig. 9, the transmission acceleration mechanism is provided with a hexagonal shaft 9. Hexagonal axle subassembly 9 forms to dismantle with hydraulic rotor 1 central axis and is connected, transmits the torsion that hydraulic rotor 1 center pin rotation produced to hexagonal axle 9. The section of a section of shaft at the end of the hexagonal shaft 9 connected with the central shaft of the hydraulic rotor 1 is hexagonal and can be detachably connected with the corresponding hexagon of the central shaft through hole of the hydraulic rotor 1.
The shaft in the middle of the hexagonal shaft 9 is arranged in inner holes of the flange bearing 10 and the bearing assembly 19, and is in intermittent fit with the flange bearing 10 and in interference fit connection with the bearing assembly 19. One end of the bearing assembly 19 is adjacent to one end of the flange bearing 10, and the other end of the flange bearing 10 is provided with an annular bearing protection baffle 18 and a clamp spring 17 at a limited position. The flange bearing 10 and the bearing assembly 19 are sleeved in an inner hole at one end of the planet carrier gear 11, the planet carrier gear 11 is cylindrical, and the end, located at the flange bearing 10 and the bearing assembly 19, of the planet carrier gear is provided with external threads which are in threaded connection with the cylindrical internal threads of the shell assembly 2. The other end of the planet carrier gear 11 is internally threaded.
The other end of the bearing assembly 19 and the planet carrier gear 11 are sequentially provided with a first-order planetary accelerating gear mechanism and a second-order planetary accelerating gear mechanism connected with the output end of the first-order planetary accelerating gear mechanism.
The first-order planetary accelerating gear mechanism is provided with a first-order planetary accelerating gear bottom plate 12, three first-order planetary accelerating gear shafts 20 and first-order planetary accelerating gears 21 connected with the first-order planetary accelerating gear shafts, and a first-order planetary accelerating sun gear 13 meshed with the first-order planetary accelerating gears 21. The axial section of the first-order planetary accelerating gear bottom plate 12 is in a T shape, an axial central through hole of the first-order planetary accelerating gear bottom plate is connected with the other end of the hexagonal shaft 9, a small end of the first-order planetary accelerating gear bottom plate faces the hexagonal shaft 9, three uniformly distributed through holes are formed in the end face of a large end of the first-order planetary accelerating gear bottom plate, one end of a first-order planetary accelerating gear shaft 20 is fixedly arranged in the three uniformly distributed through holes respectively, the other end of the first-order planetary accelerating gear shaft 20 is connected with a first-order planetary accelerating gear 21, the three first-order planetary accelerating gear 21 is meshed with a first-order planetary accelerating sun gear 13, and the axis of the first-order planetary accelerating sun gear 13 is coaxial with the axial central through hole of the first-order planetary accelerating gear bottom plate 12. The shaft of the first-order planetary acceleration sun gear 13 outputs the rotation speed after the first-order acceleration.
When the hexagonal shaft 9 rotates, the first-order planetary accelerating gear bottom plate 12 is driven to rotate, three first-order planetary accelerating gear shafts 20 which are uniformly distributed on the first-order planetary accelerating gear bottom plate 12 rotate around the axis of the first-order planetary accelerating gear bottom plate 12, a first-order planetary accelerating gear 21 connected to each first-order planetary accelerating gear shaft 20 rotates around the axis of the first-order planetary accelerating gear bottom plate 12, and a first-order planetary accelerating sun gear 13 meshed with the first-order planetary accelerating gear 21 is driven to rotate to output rotating speed.
The second-order planetary acceleration gear mechanism is provided with a second-order planetary acceleration gear bottom plate 22, three second-order planetary acceleration gear shafts 23, second-order planetary acceleration gears 24 connected with the second-order planetary acceleration gears 23 and a second-order planetary acceleration sun gear 14 meshed with the second-order planetary acceleration gears 24. The axial section of the second-order planetary accelerating gear bottom plate 22 is in a T shape, an axial central through hole of the second-order planetary accelerating gear bottom plate is connected with a shaft of the first-order planetary accelerating sun gear 13, a small end of the second-order planetary accelerating gear bottom plate faces the first-order planetary accelerating sun gear 13, three uniformly distributed through holes are formed in the end face of a large end of the second-order planetary accelerating gear bottom plate, one end of a second-order planetary accelerating gear shaft 23 is fixedly arranged in the three uniformly distributed through holes respectively, the other end of the second-order planetary accelerating gear shaft 23 is connected with a second-order planetary accelerating gear 24, the three second-order planetary accelerating gear 24 is meshed with the second-order planetary accelerating sun gear 14, and the axis of the second-order planetary accelerating sun gear 14 is coaxial with the shaft of the first-order planetary accelerating sun gear 13. The shaft of the second-order planetary acceleration sun gear 14 outputs the second-order accelerated rotational speed. The section of the output shaft connected with the second-order planetary accelerating sun gear 14 is hexagonal.
The first-order planetary acceleration sun gear 13 drives the second-order planetary acceleration gear bottom plate 22 to rotate, three second-order planetary acceleration gear shafts 23 uniformly distributed on the second-order planetary acceleration gear bottom plate 22 rotate around the axis of the second-order planetary acceleration gear bottom plate 22, so that the second-order planetary acceleration gears 24 connected to the second-order planetary acceleration gear shafts 23 rotate around the axis of the second-order planetary acceleration gear bottom plate 22, and the second-order planetary acceleration sun gear 14 meshed with the second-order planetary acceleration gears 24 is driven to rotate to output rotating speed.
An annular lubricating oil baffle plate assembly 15 is arranged at the output end of the second-order planetary accelerating gear mechanism, a cover plate 16 is arranged outside the lubricating oil baffle plate assembly 15, and the cover plate 16 is in threaded connection with the internal thread at the other end of the planet carrier gear 11.
As shown in fig. 10, the rotational grinding head connected to the output end of the transmission acceleration mechanism is provided with a hexagonal hollow shaft, one end of the hexagonal hollow shaft and the output shaft of the second-order planetary acceleration sun gear 14 output by the second-order planetary acceleration gear mechanism form a detachable connection structure, and the other end of the hexagonal hollow shaft is welded to one end of the rotational grinding wire winding pipe.
As shown in fig. 11, 12 and 13, the rotational grinding coil pipe is formed by spirally winding at least two stainless steel wires, three stainless steel wires in this embodiment, each single spiral winding wire has a pitch P of 0.5mm, an outer diameter OD of 0.8255mm, an inner diameter ID of 0.495mm, an outer diameter d of 0.165mm, a lead angle α of 11 °, and a right rotational direction. The stainless steel wire is obtained by shaping and heat treatment at the temperature of not less than 2000 ℃ after being spirally wound, has excellent torsion transmission capability and good bending capability, and can pass the complicated bending condition of blood vessels.
As shown in fig. 14, the other end of the rotational grinding coiled wire tube is provided with a rotational grinding head which is sleeved near the distal end part of the rotational grinding coiled wire tube, and the distal end of the rotational grinding coiled wire tube extends out of the rotational grinding head and is connected by laser welding. The axial section of the rotary grinding head is in a gourd shape, the small end of the gourd shape faces the far end, and the axis of the rotary grinding wire winding pipe coincides with the axis of the rotary grinding head. The rotational grinding head structure with the shape is suitable for the state of forward narrow and large area obstruction (blockage) in the blood vessel.
As shown in fig. 15, the axial cross section of the rotational grinding head is in a shape of a combination of trapezoid and rectangle, the lower bottom of the trapezoid coincides with the long side of the rectangle, the axial cross section of the rotational grinding wire winding pipe coincides with the rectangle, and the outer edge of the upper part of the axial cross section of the rotational grinding wire winding pipe coincides with the lower bottom of the trapezoid of the rotational grinding head, so that the eccentric rotational grinding head is formed. The spinning wire winding pipe extends out of the distal end of the spinning head by 2-3 cm. The rotary grinding head with the shape is suitable for improving unilateral calcification lesion and bifurcation calcification lesion of a blood vessel wall aiming at the condition of forward narrow and large-area obstruction (blockage) in a rotary grinding blood vessel.
As shown in fig. 16, the distal end of the axial cross section of the rotational grinding head is in the shape of a gourd-shaped small end, the small end of the gourd shape faces the distal end, the axis of the rotational grinding wire winding tube coincides with the axis of the gourd shape, the larger outer diameter of the small end of the gourd shape is used as the small end, the first conical shape extends towards the proximal end in the axial direction, the large end of the first conical shape extends into a cylindrical shape, the cylindrical outer diameter is used as the large end, the second conical shape extends towards the proximal end, the second conical small end is used as the third conical large end, the third conical shape extends towards the proximal end, the cylindrical length is smaller than the axial length of the first conical shape, the lower portion of the axial cross section of the rotational grinding head is cut off in the axial direction, so that the outer edge of the lower portion of the rotational grinding head is the same as the outer diameter of the first conical small end, and the large end of the third conical shape is used for forming an eccentric rotational grinding head. The rotary grinding head with the shape can dredge the forward stenosis, improve calcified lesions on the vessel wall and avoid bifurcation lesions.
The invention converts the liquid kinetic energy into the mechanical energy of the rotation of the rotary grinding head, and the rotary grinding head can eliminate or improve the state of diseases caused by completely occluded lesions in the periphery or coronary artery. Compared with pneumatic and motor driving, the hydraulic rotary grinding device has the advantages that the same rotary grinding effect can be realized, the rotary grinding head meets the requirement of high rotating speed for treating pathological changes, transmission noise can be reduced under the condition that the rotary grinding head rotates at high speed, friction heat retained in a human body due to rotary grinding is reduced, cooling and lubricating solution input into the human body is reduced, the kidney metabolism burden of the human body is relieved, and the safety of an operation is improved.
The invention adopts the constant pressure water pump to ensure that the output water pressure is not lower than 50Mpa, adjusts the diameter of the output port of the water flow control valve, controls the size of the water outlet of the water flow control valve to adjust the output liquid flow of the water flow control valve, drives the water wheel to convert the water flow energy into mechanical energy, and controls the rotating speed of the rotary grinding head to be 70000-150000 rad/min after the speed is increased by the transmission accelerating mechanism. Simple structure, low cost, safe and reliable operation.
Claims (10)
1. The utility model provides an endovascular calcification pathological change grinds equipment soon, is equipped with the bistrique that grinds soon which characterized in that: the rotary grinding head is driven to rotate by a water pump through a water turbine.
2. The rotational atherectomy device of claim 1, wherein: the water pump is a constant pressure water pump, the constant pressure water pump is connected with the rotary grinding head through a water flow control valve and a water turbine, the output liquid pressure of the constant pressure water pump is not lower than 50Mpa, the rotating speed of the rotary grinding head is 70000-150000 rad/min, the output liquid flow of the water flow control valve is adjusted, and the rotating speed of the rotary grinding head is controlled to be a certain value in 70000-150000 rad/min.
3. The rotational atherectomy device of claim 2, wherein: the water turbine is formed by connecting a water wheel and a transmission accelerating mechanism.
4. The rotational atherectomy device of claim 3, wherein: the water wheel, the transmission accelerating mechanism and the rotary grinding head are coaxially connected.
5. The rotational atherectomy device of claim 4, wherein: the water wheel is provided with a shell component (2), and a water wheel rotor (1) is coaxially arranged in the shell component (2); the inner diameter of a cylinder of the shell component (2) is 16-30 mm, the outer diameter of the cylinder is 18-34 mm, the middle part of the cylinder is radially connected with another two cylinders with the diameter smaller than that of the cylinder, the two cylinders are respectively a water inlet and a water outlet, and the axes of the water inlet and the water outlet are vertical to the axis of the cylinder and are distributed at 30-60 degrees; the water wheel rotor (1) is provided with a central shaft, a through hole is formed along the axis of the central shaft, and at least two blades are connected to the central shaft.
6. The rotational atherectomy device of claim 4, wherein: the transmission acceleration mechanism is formed by connecting a first-order planetary acceleration gear mechanism and a second-order planetary acceleration gear mechanism.
7. The rotational atherectomy device of claim 4, wherein: the rotary grinding head is provided with a hexagonal hollow shaft, one end of the hexagonal hollow shaft and an output shaft of the second-order planetary accelerating gear mechanism form a detachable connecting structure, the other end of the hexagonal hollow shaft is connected with one end of a rotary grinding wire winding pipe, the other end of the rotary grinding wire winding pipe is sleeved with the rotary grinding head, and the rotary grinding wire winding pipe extends out of the rotary grinding head.
8. The rotational atherectomy device of claim 7, wherein: the axial section of the rotary grinding head is in a gourd shape, the small end of the gourd shape faces the far end, and the axis of the rotary grinding wire winding pipe coincides with the axis of the rotary grinding head.
9. The rotational atherectomy device of claim 7, wherein: the axial section of the rotary grinding head is in a shape formed by combining a trapezoid and a rectangle, the lower bottom of the trapezoid is superposed with the long side of the rectangle, the axial section of the rotary grinding wire winding pipe is superposed with the rectangle, and the outer edge of the upper part of the axial section of the rotary grinding wire winding pipe is superposed with the lower bottom of the trapezoid of the rotary grinding head, so that the eccentric rotary grinding head is formed.
10. The rotational atherectomy device of claim 7, wherein: the far end of the axial section of the rotary grinding head is in a gourd-shaped small end shape, the axis of a wire winding pipe of the rotary grinding head coincides with the axis of the gourd shape, the larger outer diameter of the gourd-shaped small end is used as the small end, the first conical shape extends towards the near end along the axial direction, the first conical large end extends in a cylindrical shape, the cylindrical outer diameter is used as the large end, the second conical shape extends along the near end, the second circular small end is used as the third conical large end, the third conical shape extends along the near end, the cylindrical length is smaller than the axial length of the first conical shape, the lower part of the axial section of the rotary grinding head is cut off along the axial direction, the outer edge of the lower part of the rotary grinding head is identical to the outer diameter of the first conical small end, and the large end of the third conical shape forms an eccentric rotary grinding head.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/100091 WO2021169135A1 (en) | 2020-07-03 | 2020-07-03 | Rotational atherectomy device for calcified lesion in blood vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114144131A true CN114144131A (en) | 2022-03-04 |
Family
ID=77490679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080007853.1A Pending CN114144131A (en) | 2020-07-03 | 2020-07-03 | Rotary grinding device for calcified lesion in blood vessel |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7465882B2 (en) |
| CN (1) | CN114144131A (en) |
| DE (2) | DE112020000311T5 (en) |
| WO (1) | WO2021169135A1 (en) |
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- 2020-07-03 JP JP2021546844A patent/JP7465882B2/en active Active
- 2020-07-03 DE DE112020000311.6T patent/DE112020000311T5/en active Pending
- 2020-07-03 CN CN202080007853.1A patent/CN114144131A/en active Pending
- 2020-07-03 DE DE212020000500.1U patent/DE212020000500U1/en active Active
- 2020-07-03 WO PCT/CN2020/100091 patent/WO2021169135A1/en active Application Filing
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| US4589412A (en) * | 1984-01-03 | 1986-05-20 | Intravascular Surgical Instruments, Inc. | Method and apparatus for surgically removing remote deposits |
| US5314407A (en) * | 1986-11-14 | 1994-05-24 | Heart Technology, Inc. | Clinically practical rotational angioplasty system |
| JPH08639A (en) * | 1994-06-24 | 1996-01-09 | Morita Mfg Co Ltd | Small fluid drive turbine hand piece |
| DE29521096U1 (en) * | 1995-07-29 | 1996-08-14 | Karlsruhe Forschzent | Catheter for the mechanical removal of deposits on vessel walls |
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| CN111012448A (en) * | 2019-08-20 | 2020-04-17 | 上海微创医疗器械（集团）有限公司 | Rotary grinding device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112020000311T5 (en) | 2022-02-24 |
| JP7465882B2 (en) | 2024-04-11 |
| JP2022525503A (en) | 2022-05-17 |
| DE212020000500U1 (en) | 2021-08-16 |
| WO2021169135A1 (en) | 2021-09-02 |
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