CN219289597U - Thrombus clearing device - Google Patents
Thrombus clearing device Download PDFInfo
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- CN219289597U CN219289597U CN202320023560.3U CN202320023560U CN219289597U CN 219289597 U CN219289597 U CN 219289597U CN 202320023560 U CN202320023560 U CN 202320023560U CN 219289597 U CN219289597 U CN 219289597U
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Abstract
The utility model relates to the field of medical equipment, and provides a thrombus removing device, which comprises: the suction catheter assembly comprises an outer catheter assembly and a gradual decompression tube assembly, and a catheter cavity is formed between the gradual decompression tube assembly and the outer catheter assembly; the gradual pressure reducing pipe assembly consists of a near-end pressure reducing pipe, a middle pressure reducing pipe and a far-end pressure reducing pipe; a pump assembly for inputting a high pressure fluid into the gradual decompression tube assembly; an injection assembly including a first injection hole injecting a high pressure fluid toward the proximal relief tube; a piercer assembly for inputting high pressure fluid to the high pressure pump assembly; a sealing valve is arranged at the joint of the near-end pressure reducing pipe and the high-pressure pump assembly, and a plurality of filtering pressure reducing holes are arranged at the necking part of the sealing valve. Through setting up the sealing valve on the proximal decompression pipe, the throat department of sealing valve sets up the filtration relief pressure hole to further decompress through gradual change decompression pipe assembly, reduce high-pressure fluid pressure, reduce the damage to the vascular wall.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a thrombus removing device.
Background
Thrombus is generally a solid mass of blood that undergoes abnormal clotting during flow due to activation of platelets and coagulation factors, and is composed mainly of insoluble fibrin, deposited platelets, accumulated white blood cells, and entrapped red blood cells. Clinically common thrombotic patients, the most prominent features are familial genetics, recurrent attacks, symptom severity, thrombotic site abnormalities, and time to onset younger. In the acute or subacute phase of thrombus formation, the thrombus is generally in the form of a soft sponge and becomes rigid and fibrillated over time. Thrombus can occlude blood vessels, affecting blood flow, leading to lesions in tissues and organs.
For example, intravascular stents have the functions of expanding a narrow blood vessel and ensuring the smoothness of local blood flow, and because the intravascular surface and the stent are not smooth, thrombus is easily formed and vascular endothelial hyperplasia is caused to occur to generate restenosis. The stent is used for taking the thrombus for many times, so that serious damage is easily caused to the inner wall of the blood vessel, the time consumption is long, and the thrombus removal efficiency is low.
Current mechanical thrombi removal procedures are becoming increasingly popular with doctors and patients. By utilizing the principle of mechanics or hydrodynamics, the thrombus is mechanically crushed and sucked through the catheter to achieve the purpose of recanalizing the blood vessel. Shortens the treatment time, does not use or uses few thrombolytic drugs, reduces the incidence rate of bleeding complications and reduces the pain of patients. However, the catheter mechanism in the prior art has poor thrombolysis and thrombolysis effects, low thrombus removal efficiency, poor sealing effect in the prior art, high pressure of the sprayed physiological saline and easy damage to the vessel wall.
Disclosure of Invention
The present utility model is directed to solving at least one of the technical problems existing in the related art. Therefore, the utility model provides a thrombus removing device, which comprises a near-end decompression tube, a middle decompression tube and a far-end decompression tube by arranging a gradual decompression tube assembly; and a sealing valve is arranged, and a filtering pressure-reducing hole is arranged at the necking position of the sealing valve, so that the pressure of the ejected high-pressure fluid is reduced.
A thrombus removal device according to an embodiment of the present utility model, comprising:
the suction catheter assembly comprises an outer catheter assembly and a gradual decompression tube assembly arranged in the outer catheter assembly, a catheter cavity is formed between the gradual decompression tube assembly and the outer catheter assembly, and the outer catheter assembly is provided with a proximal end and a distal end; the gradual change decompression tube assembly consists of a near-end decompression tube, a middle decompression tube and a far-end decompression tube;
the pump assembly comprises a high-pressure pump assembly, the proximal pressure reducing pipe is arranged in a high-pressure pump cavity of the high-pressure pump assembly, and high-pressure fluid is input into the gradual pressure reducing pipe assembly through the high-pressure pump cavity.
The injection assembly is arranged at the far end of the far-end pressure reducing pipe, the first injection holes are uniformly distributed on the far-end pressure reducing pipe, the first injection holes inject high-pressure fluid towards the direction of the near-end pressure reducing pipe, and the high-pressure fluid is converged on the central axis of the outer catheter;
the puncture outfit assembly is connected with the high-pressure pump assembly and is used for inputting high-pressure fluid to the high-pressure pump assembly;
the connection part between the near-end pressure reducing pipe and the high-pressure pump assembly is provided with a sealing valve, and the necking part of the sealing valve is provided with a plurality of filtering pressure reducing holes.
The thrombus removal device according to an embodiment of the present application, further comprises a hemostatic valve assembly and a connecting tube, wherein the hemostatic valve assembly is connected with the high-pressure pump assembly through the connecting tube and is communicated with the catheter lumen.
According to an embodiment of the present application, the aspiration catheter assembly further comprises a developing ring, and the gradually-changing pressure-reducing tube assembly is connected with the outer catheter assembly through the developing ring.
According to the thrombus cleaning device disclosed by the embodiment of the application, the injection assembly is an annular inclined plane, and the first injection holes are uniformly formed in the annular inclined plane.
According to an embodiment of the present application, the pump assembly further comprises a piston rod assembly, a low pressure pump assembly and a high pressure pump mount,
the low pressure pump assembly is internally provided with a low pressure pump cavity, the low pressure pump cavity is communicated with the high pressure pump cavity, the high pressure pump assembly is communicated with the gradual change pressure reducing pipe assembly, the piston rod assembly penetrates through the low pressure pump cavity and the high pressure pump cavity, and the high pressure pump assembly is connected with the high pressure pump base in a split mode.
According to the thrombus cleaning device of the embodiment of the application, the thrombus cleaning device further comprises a waste liquid collecting assembly, the waste liquid collecting assembly is connected with the low-pressure chamber, the waste liquid collecting assembly comprises a waste liquid bag, a first connecting pipe and a first filter, the waste liquid bag is connected with the low-pressure pump chamber through the first connecting pipe, and the first filter is installed on the waste liquid bag.
According to the thrombus cleaning device of the embodiment of the application, the ball seat is arranged at the bottom of the high-pressure pump assembly, and the sealing groove is formed in the ball seat and accommodates the steel ball.
According to the thrombus removal device of the embodiment of the application, the liquid outlet one-way valve is arranged between the waste liquid bag and the low-pressure pump cavity, and the liquid inlet one-way valve is arranged between the catheter cavity and the low-pressure cavity.
According to the thrombus removal device of the embodiment of the application, the puncture outfit assembly comprises a second filter, a second connecting pipe and a third filter, wherein the second filter and the third filter are connected with the second connecting pipe, and the third filter is connected with the high-pressure pump assembly.
According to the thrombus cleaning device disclosed by the embodiment of the application, the pump assembly is an all-metal pump assembly.
The above technical solutions in the embodiments of the present utility model have at least one of the following technical effects:
an embodiment of the present utility model provides a thrombus removal device including:
the suction catheter assembly comprises an outer catheter assembly and a gradual decompression tube assembly arranged in the outer catheter assembly, a catheter cavity is formed between the gradual decompression tube assembly and the outer catheter assembly, and the outer catheter assembly is provided with a proximal end and a distal end; the gradual change decompression tube assembly consists of a near-end decompression tube, a middle decompression tube and a far-end decompression tube; the pump assembly comprises a high-pressure pump assembly, the proximal pressure reducing pipe is arranged in a high-pressure pump cavity of the high-pressure pump assembly, and high-pressure fluid is input into the gradual pressure reducing pipe assembly through the high-pressure pump cavity. The injection assembly is arranged at the far end of the far-end pressure reducing pipe, the first injection holes are uniformly distributed on the far-end pressure reducing pipe, the first injection holes inject high-pressure fluid towards the direction of the near-end pressure reducing pipe, and the high-pressure fluid is converged on the central axis of the outer catheter; the puncture outfit assembly is connected with the high-pressure pump assembly and is used for inputting high-pressure fluid to the high-pressure pump assembly; the connection part between the near-end pressure reducing pipe and the high-pressure pump assembly is provided with a sealing valve, and the necking part of the sealing valve is provided with a plurality of filtering pressure reducing holes. The sealing valve is arranged at the joint of the near-end pressure reducing pipe and the high-pressure pump assembly, the filtering pressure reducing hole is arranged at the necking part of the sealing valve, and the pressure of the ejected high-pressure fluid is reduced through the near-end pressure reducing pipe, the middle pressure reducing pipe and the far-end pressure reducing pipe, so that the damage to the blood vessel wall is reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic view of a thrombus cleaning device according to an embodiment of the present utility model;
FIG. 2 is a schematic flow diagram of a high pressure fluid provided in an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a pump assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic illustration of a low pressure pump assembly according to an embodiment of the present utility model;
FIG. 5 is a schematic illustration of a high pressure pump assembly according to an embodiment of the present utility model;
FIG. 6 is a schematic view of a high pressure pump mount according to an embodiment of the present utility model;
FIG. 7 is a schematic view of a graded pressure relief tube assembly according to an embodiment of the present utility model;
FIG. 8 is a schematic diagram of a spray assembly according to an embodiment of the present utility model;
FIG. 9 is a schematic view of a suction catheter assembly according to an embodiment of the present utility model;
fig. 10 is a schematic view of the structure of the injection hole and the suction plug hole according to the embodiment of the present utility model.
Reference numerals:
1. a suction catheter assembly; 11. an outer catheter assembly; 12. a gradual decompression tube assembly; 13. a catheter lumen; 14. a sealing valve; 15. a hemostatic valve assembly; 16. a developing ring; 17. a connecting pipe; 121. a proximal pressure relief tube; 122. an intermediate pressure reducing tube; 123. a distal decompression tube; 141. filtering the pressure reducing hole; 142. sealing the lock nut interface; 143. sealing the lock nut; 131. a liquid inlet one-way valve; 1201. a distal fixation ring; 1202. a ring, 1203, ring ramp, 1204, proximal fixation ring; 1205. a high-pressure pipe end socket; 110. braiding a tube; 1101. weaving filaments; 1102. a non-woven tube; 1103. A second injection hole; 1104. a suction plug hole; 1301. a liquid inlet port; 1302. A high pressure lock nut; 1303. a high pressure seal; 1304. a high pressure seal ring; 1305. bolt holes; 1306. a first inferior lumen balloon interface; 1307. a channel; 1308. sealing the interface; 1309. A bottom sealing ring;
2. a pump assembly; 21. a high pressure pump assembly; 22. a piston rod assembly; 23. a low pressure pump assembly; 24. a high pressure pump base; 211. a high pressure pump chamber; 212. a ball seat; 213. a lower lumen balloon; 2121. sealing grooves; 2122. a steel ball; 221. a piston rod; 231. a low pressure pump chamber; 232. an upper lumen balloon; 2301. an upper lumen balloon interface; 2302. low pressure lock nut-up; 2303. low pressure seal-up; 2304. low pressure seal ring-up; 2306. a low voltage interface; 2307. a second inferior lumen balloon interface; 2308. low pressure seal-down; 2309. low pressure seal ring-down; 2310. low pressure lock nut-down; 2311. a liquid discharge hole; 2312. a fixed cavity; 2305. a fixing hole; 241. a base seal groove; 242. a base bolt hole;
3. a jetting assembly; 31. a first injection hole;
4. a puncture outfit assembly; 41. a second filter; 42. a second connection pipe; 43. a third filter;
5. a waste liquid collection assembly; 51. a waste liquid bag; 52. a first connection pipe; 53. a first filter; 54. a liquid outlet one-way valve;
6. and a tee joint assembly.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
For ease of description and understanding, the terms "distal" and "proximal" should be understood to refer to the direction of the hand-held end of the attending physician or medical intervention physician. The distal end is the side distal from the hand-held end of the attending physician or medical intervention physician, while the proximal end represents the side toward the hand-held end of the attending physician or medical intervention physician.
An embodiment of one aspect of the present utility model, as shown in connection with fig. 1 to 10, provides a thrombus removal device comprising: suction catheter assembly 1, suction catheter assembly 1 includes outer catheter assembly 11 and gradual decompression tube assembly 12 disposed within outer catheter assembly 11, catheter lumen 13 is formed between gradual decompression tube assembly 12 and outer catheter assembly 11, outer catheter assembly 11 has proximal end and distal end; the gradual decompression tube assembly 12 is composed of a proximal decompression tube 121, an intermediate decompression tube 122 and a distal decompression tube 123; the pump assembly 2, including the high-pressure pump assembly 21, has a proximal relief tube 121 disposed in a high-pressure pump chamber 211 of the high-pressure pump assembly 21, and inputs high-pressure fluid into the gradual relief tube assembly 12 via the high-pressure pump chamber 211. The injection assembly 3 is arranged at the far end of the far-end pressure reducing pipe 123, the first injection holes 31 are uniformly distributed on the far-end pressure reducing pipe 123, the first injection holes 31 inject high-pressure fluid towards the direction of the near-end pressure reducing pipe 121, and the high-pressure fluid is converged on the central axis of the outer catheter; a piercer assembly 4 connected to the high-pressure pump assembly 21 for inputting a high-pressure fluid to the high-pressure pump assembly 21; a sealing valve 14 is arranged at the joint of the proximal decompression tube 121 and the high-pressure pump assembly 21, and a plurality of filtering decompression holes 141 are arranged at the necking part of the sealing valve 14. By providing the sealing valve 14 at the junction with the high-pressure pump assembly 21 on the proximal pressure reducing tube 121, the reduced-pressure filtering holes 141 are provided at the constriction of the sealing valve 14, and the pressure of the ejected high-pressure fluid is reduced by further reducing the pressure through the proximal pressure reducing tube 121, the intermediate pressure reducing tube 122 and the distal pressure reducing tube 123, and the damage to the blood vessel wall is reduced.
In particular, the outer catheter assembly 11 is used for inserting into a blood vessel, has high fracture resistance, is made of a hypotube or a pebax tube with a braided wire, and has a size determined by the size of the blood vessel to be inserted, which is not particularly limited in the present application. Optionally, the distal end of the outer catheter assembly 11 is formed with a tip that facilitates insertion into a blood vessel, the diameter of the tip gradually decreasing from the proximal end to the distal end.
In an alternative embodiment, as shown in connection with fig. 2 and 9, further comprising a hemostatic valve assembly 15 and a connecting tube 17, the hemostatic valve assembly 15 is connected to the high-pressure pump assembly 21 by the connecting tube 17 and is in communication with the catheter lumen 13. In particular, the hemostatic valve assembly 15 allows a guidewire to enter the catheter lumen 13 through the hemostatic valve body, which interfaces the graduated pressure-reducing tube assembly 12 with the injection thrombolytic drug interface.
In an alternative embodiment, as shown in connection with fig. 2-9, when the piston rod 221 moves upward, the low pressure pump chamber 231 and the high pressure pump chamber 211 are in a negative pressure state, the steel ball 2122 moves upward, and high pressure fluid (e.g., physiological saline) is sucked into the high pressure pump chamber 211 along the puncture outfit assembly 4, and thrombus is sucked into the braided tube 110, moves in the injection direction of the first injection hole 31 of the injection assembly 3, and is fed into the low pressure pump chamber 231 through the three-way assembly 6.
Optionally, a liquid outlet one-way valve 54 is arranged between the waste liquid bag 51 and the low-pressure pump cavity 231, and a liquid inlet one-way valve 131 is arranged between the conduit cavity 13 and the low-pressure cavity to prevent backflow; optionally, the puncture outfit assembly 4 includes a second filter 41, a second connection tube 42, a third filter 43, the second connection tube 42 connecting the second filter 41 and the third filter 43, the third filter 43 being connected with the high pressure pump assembly 21, wherein the second filter 41 is an air filter, and the third filter 43 is a medical fluid filter. The third filter 43 is connected to the liquid inlet 1301 of the high-pressure pump assembly 21, and supplies the high-pressure fluid into the high-pressure pump assembly 21. When the piston rod 221 moves downwards, thrombus in the low-pressure pump cavity 231 is sent into the waste liquid bag 51 through the liquid outlet one-way valve 54, the liquid inlet one-way valve 131 is in a closed state, the high-pressure pump cavity 211 is in a high-pressure state, the steel ball 2122 moves downwards under the action of high-pressure fluid to seal the sealing groove 2121, the high-pressure fluid is forced to flow into the gradual decompression tube assembly 12 to be sprayed out of the distal spraying assembly 3, a positive pressure area is formed around the first spraying hole 31, a negative pressure area is formed around the suction plug hole 1104, and thrombus is sucked into the woven tube 110 under the action of a cross flow effect through the up-and-down reciprocating motion of the piston rod 221, so that suction circulation is formed.
It is to be understood that: the piston rod 221 reciprocates up and down so that both the high pressure pump chamber 211 and the low pressure pump chamber 231 have reciprocating cycles of an intake stroke and an extrusion stroke, and the reciprocation of the high pressure pump chamber 211 and the low pressure pump chamber 231 is not out of phase, i.e., the intake stroke of the high pressure pump chamber 211 and the intake stroke of the low pressure pump chamber 231 occur simultaneously, and the extrusion stroke of the high pressure pump chamber 211 and the extrusion stroke of the low pressure pump chamber 231 occur simultaneously.
In the prior art, like products are usually fixed by adopting an inner metal insert and an outer injection molding part, and in use, the conditions of fracture, leakage and the like are found to occur easily at the joint of the insert, so that the operation is interrupted, and a patient is in a dangerous condition, therefore, the high-pressure pump assembly 21 and the low-pressure pump assembly 23 in the application are of a pressure-bearing cylinder structure, high-strength alloy steel can be selected as materials, and the pump assembly can be an all-metal pump assembly, so that the pressure resistance is better and more stable.
Optionally, as shown in connection with fig. 2 and 9, further comprising a visualization ring 16, a hemostatic valve assembly 15 in communication with the catheter lumen 13; the hemostatic valve assembly 15 is adhered to the proximal end of the outer catheter assembly 11, wherein the outer catheter assembly 11 is composed of a braided tube 110 and a non-braided tube 1102, the braided tube 110 is composed of a three-layer structure, the middle layer is a braided wire 1101, and the inner layer and the outer layer are respectively wrapped with pebax. The variable relief tube assembly 12 is connected to the outer catheter assembly 11 by a developer ring 16. Specifically, the hemostatic valve assembly 15 is adhered to the proximal end of the outer catheter assembly 11, and is typically cured with a UV glue or a two-component epoxy glue, and the graded pressure relief tube assembly 12 is crimped to the outer catheter assembly 11 by a developing ring 16.
In an alternative embodiment, as shown in fig. 8, the injection assembly 3 has a circular ring 1202, a circular ring inclined surface 1203 is disposed on the circular ring 1202, the first injection holes 31 are uniformly disposed on the circular ring inclined surface 1203, a central axis of each first injection hole 31 intersects with a central axis of the outer catheter assembly 11, and an included angle between the central axis of each first injection hole 31 and the central axis of the outer catheter assembly 11 is an acute angle.
Referring to fig. 8, 9 and 10, the high pressure fluid ejected from the first ejection hole 31 is ejected into the catheter lumen 13 at an angle to the central axis of the outer catheter assembly 11, and is converged on the central axis of the outer catheter assembly 11 and flows toward the proximal end; further, the suction plug hole 1104 is provided near the first injection hole 31.
In an alternative embodiment, as shown in fig. 3, 4 and 5, the pump assembly 2 further includes a piston rod assembly 22, a low pressure pump assembly 23 and a high pressure pump base 24, a low pressure pump chamber 231 is formed inside the low pressure pump assembly 23, the low pressure pump chamber 231 is communicated with the high pressure pump chamber 211, the high pressure pump assembly 21 is communicated with the gradual decompression tube assembly 12, the piston rod assembly 22 is penetrated in the low pressure pump chamber 231 and the high pressure pump chamber 211, and the high pressure pump assembly 21 and the high pressure pump base 24 are connected in a split manner. The low pressure pump assembly 23 is provided with a low pressure port 2306 connected to the waste collection assembly, through which thrombus and waste fluid are delivered to the waste bag 51. As shown in connection with fig. 6, the high pressure pump mount 24 includes a mount seal groove 241 and a mount bolt hole 242.
Specifically, the pump assembly 2 further includes an upper cavity balloon 232 and a lower cavity balloon 213, an upper cavity balloon interface 2301 is disposed at an upper end of the low pressure pump assembly 23, a second lower cavity balloon interface 2307 is disposed at a lower end of the low pressure pump assembly 23 and an upper end of the high pressure pump assembly 21, a fixing cavity 2312 is disposed below the low pressure pump assembly 23, a fixing hole 2305 and a liquid discharge hole 2311 for fixing the high pressure pump assembly 21 are formed in the fixing cavity 2312, and a bolt hole 1305 matched with the fixing hole 2305 is formed above the high pressure pump assembly 21. The top of high pressure pump assembly 21 is positioned within stationary cavity 2312 and fixedly coupled to bolt hole 1305 through stationary aperture 2305. The piston rod assembly 22 includes a piston rod 221, the piston rod 221 being disposed within the low pressure pumping chamber 231 and the low pressure pumping chamber 231, the thrombus cleaning device being powered by up and down movement of the piston rod 221.
Specifically, ball seat 212 is provided at the bottom of high pressure pump assembly 21, and ball seat 212 is provided with a seal groove 2121, and seal groove 2121 accommodates steel ball 2122.
In an alternative embodiment, as shown in fig. 4 and 5, the upper end of the low-pressure pump assembly 23 is sealed by the low-pressure sealing member-upper 2303 and the low-pressure sealing ring-upper 2304, and then screwed and fixed by the low-pressure locking nut-upper 2302, so as to realize the sealing of the upper end of the low-pressure pump assembly 23; the lower end of the low-pressure pump assembly 23 is sealed by a low-pressure sealing element-lower 2308 and a low-pressure sealing ring-lower 2309, and then is screwed and fixed by a low-pressure locking nut-lower 2310, so that the lower end of the low-pressure pump assembly 23 is sealed. The upper end of the high-pressure pump assembly 21 is sealed by the high-pressure sealing element 1303 and the high-pressure sealing ring 1304, and then is screwed and fixed by the high-pressure locking nut 1302, so that the upper end of the high-pressure pump assembly 21 is sealed, and the tightness of the piston rod 221 during up-and-down reciprocating motion is ensured. The bottom of the high-pressure pump assembly 21 is fixedly connected with the high-pressure pump base 24 through the base bolt holes 242 after being sealed by the bottom sealing ring 1309. The bottom sealing ring 1309 is made of rubber or fluorine rubber, so that the tightness of connection between the high-pressure pump assembly 21 and the high-pressure pump base 24 is guaranteed, the sealing piece is made of teflon, and the locking nut is made of stainless steel. As shown in fig. 3 and 5, the aperture size of the channel 1307 is narrower, the spherical surface of the seal groove 2121 needs to be ensured, and the processing difficulty is high, so that the sealing performance is ensured and the processing difficulty is reduced by adopting a split type fixing mode of the high-pressure pump assembly 21 and the high-pressure pump base 24 and sealing the channel through the bottom sealing ring 1309.
In an alternative embodiment, referring to FIG. 7, graduated pressure relief tube assembly 12 includes a proximal pressure relief tube 121, a sealing valve 14, an intermediate pressure relief tube 122, a proximal retaining ring 1201, a distal pressure relief tube 123, and a distal retaining ring 1204. Wherein the sealing valve 14 is fixed on the proximal pressure reducing tube 121, and a high pressure tube seal 1205 is provided at the end of the sealing valve near the high pressure pump assembly 21, and optionally, the high pressure tube seal 1205 is sealed in an arc shape. The filter pressure reducing holes 141 are located at the constrictions of the sealing valve 14, and are composed of an array of micro-holes, to reduce the pressure of the high pressure fluid entering the proximal pressure reducing tube 121.
Referring to fig. 3 and 5, the sealing valve 14 is disposed in the sealing interface 1308, wherein the sealing surface of the sealing valve 14 is in fit connection with the sealing interface 1308, and is tightly pressed and fixed by the sealing tightening nut interface 142 and the sealing locking nut 143, and the sealing locking nut 143 is filled with glue for sealing, and both the sealing valve 14 and the sealing locking nut 143 are made of stainless steel.
As shown in fig. 2, 3, 4, 5 and 10, when the piston rod 221 moves upward, negative pressure is generated in the high-pressure pump chamber 211, physiological saline enters the puncture outfit assembly 4, and the physiological saline filtered by the liquid medicine filter is delivered into the high-pressure pump chamber 211, and at this time, the steel ball 2122 moves upward as the saline enters, between the seal groove 2121 and the filtering and depressurizing hole 141. When the piston rod 221 moves downward, the steel ball 2122 will enter the seal groove 2121 to form a closed state due to the pressure effect, preventing saline from entering the channel 1307, and at this time, the saline in the high-pressure pumping chamber 211 is in a high-pressure state, and the high-pressure saline is forced to enter the proximal decompression tube 121 from the filtering decompression hole 141, is transported to the distal decompression tube 123 section through the middle decompression tube 122 section, and is decompressed again, and the saline with moderate pressure is sprayed at the first spraying hole 31 on the annular inclined surface 1203.
Optionally, the thrombus cleaning device further comprises a waste liquid collecting assembly 5, the waste liquid collecting assembly 5 is connected to the low pressure port 2306 of the low pressure pump chamber 231, the waste liquid collecting assembly 5 comprises a waste liquid bag 51, a first connecting tube 52 and a first filter 53, the first filter is an air filter, the waste liquid bag 51 is connected to the low pressure pump chamber 231 through the first connecting tube 52, and the first filter 53 is mounted on the waste liquid bag 51.
The normal saline output from the first jet hole 31 with moderate pressure is converged at a certain point along the central axis of the catheter cavity 13 and then diverged, so as to form atomized normal saline. The atomized normal saline is sprayed from the second spraying hole 1103 to break up thrombus, and a negative pressure area is generated around the suction plug hole 1104, so that the broken thrombus waste liquid is sucked into the suction plug hole 1104 through the cross flow effect, is sent into the low pressure pump cavity 231 through the three-way assembly 6 in the catheter cavity 13, is sent into the low pressure pump cavity 231 along the catheter cavity, and is then discharged into the waste liquid bag 51 from the low pressure port 2306 through the power generated by the up-and-down reciprocating motion of the piston rod 221.
An embodiment of the present utility model provides a thrombus removal device including: suction catheter assembly 1, suction catheter assembly 1 includes outer catheter assembly 11 and gradual decompression tube assembly 12 disposed within outer catheter assembly 11, catheter lumen 13 is formed between gradual decompression tube assembly 12 and outer catheter assembly 11, outer catheter assembly 11 has proximal end and distal end; the gradual decompression tube assembly 12 is composed of a proximal decompression tube 121, an intermediate decompression tube 122 and a distal decompression tube 123; the pump assembly 2, including the high-pressure pump assembly 21, has a proximal relief tube 121 disposed in a high-pressure pump chamber 211 of the high-pressure pump assembly 21, and inputs high-pressure fluid into the gradual relief tube assembly 12 via the high-pressure pump chamber 211. The injection assembly 3 is arranged at the far end of the far-end pressure reducing pipe 123, the first injection holes 31 are uniformly distributed on the far-end pressure reducing pipe 123, the first injection holes 31 inject high-pressure fluid towards the direction of the near-end pressure reducing pipe 121, and the high-pressure fluid is converged on the central axis of the outer catheter; a piercer assembly 4 connected to the high-pressure pump assembly 21 for inputting a high-pressure fluid to the high-pressure pump assembly 21; a sealing valve 14 is arranged at the joint of the proximal decompression tube 121 and the high-pressure pump assembly 21, and a plurality of filtering decompression holes 141 are arranged at the necking part of the sealing valve 14. By providing the sealing valve 14 at the junction with the high-pressure pump assembly 21 on the proximal pressure reducing tube 121, the reduced-pressure filtering holes 141 are provided at the constriction of the sealing valve 14, and the pressure of the ejected high-pressure fluid is reduced by further reducing the pressure through the proximal pressure reducing tube 121, the intermediate pressure reducing tube 122 and the distal pressure reducing tube 123, and the damage to the blood vessel wall is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or some of the technical features may be replaced with equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A thrombi removal device, comprising:
a suction catheter assembly (1), the suction catheter assembly (1) comprising an outer catheter assembly (11) and a gradual decompression tube assembly (12) arranged in the outer catheter assembly (11), a catheter cavity (13) being formed between the gradual decompression tube assembly (12) and the outer catheter assembly (11), the outer catheter assembly (11) having a proximal end and a distal end; the gradual decompression tube assembly (12) is composed of a proximal decompression tube (121) connected with a middle decompression tube (122) and then connected with a distal decompression tube (123);
a pump assembly (2) comprising a high pressure pump assembly (21), said proximal pressure relief tube (121) being disposed in a high pressure pump chamber (211) of said high pressure pump assembly (21), high pressure fluid being input into said graduated pressure relief tube assembly (12) via said high pressure pump chamber (211);
the injection assembly (3) is arranged at the far end of the far-end pressure reducing pipe (123), the first injection holes (31) are uniformly distributed on the far-end pressure reducing pipe (123), the first injection holes (31) inject high-pressure fluid towards the direction of the near-end pressure reducing pipe (121), and the high-pressure fluid is converged on the central axis of the outer catheter;
a puncture outfit assembly (4) connected with the high-pressure pump assembly (21) for inputting high-pressure fluid into the high-pressure pump assembly (21);
a sealing valve (14) is arranged at the joint of the proximal pressure reducing pipe (121) and the high-pressure pump assembly (21), and a plurality of filtering pressure reducing holes (141) are formed at the necking part of the sealing valve (14).
2. The thrombi elimination device according to claim 1, further comprising a hemostatic valve assembly (15) and a connecting tube (17), wherein said hemostatic valve assembly (15) is connected to said high pressure pump assembly (21) through said connecting tube (17) and is in communication with said catheter lumen (13).
3. The thrombectomy device of claim 1, wherein the aspiration catheter assembly (1) further comprises a visualization ring (16), the graduated pressure relief tube assembly (12) being connected to the outer catheter assembly (11) by the visualization ring (16).
4. The thrombi elimination apparatus according to claim 1, wherein said injection assembly (3) is a circular ring slope, and said first injection holes (31) are uniformly provided on said circular ring slope.
5. The thrombectomy device of any one of claims 1-4, wherein the pump assembly (2) further comprises a piston rod assembly (22), a low pressure pump assembly (23) and a high pressure pump mount (24),
the low-pressure pump assembly (23) is internally provided with a low-pressure pump cavity (231), the low-pressure pump cavity (231) is communicated with the high-pressure pump cavity (211), the high-pressure pump assembly (21) is communicated with the gradual decompression pipe assembly (12), the piston rod assembly (22) is arranged in the low-pressure pump cavity (231) and the high-pressure pump cavity (211) in a penetrating mode, and the high-pressure pump assembly (21) is connected with the high-pressure pump base (24) in a split mode.
6. The thrombi removal device of claim 5, further comprising a waste collection assembly (5), said waste collection assembly (5) being connected to said low pressure pump chamber (231), said waste collection assembly (5) comprising a waste bag (51), a first connecting tube (52) and a first filter (53), said waste bag (51) being connected to said low pressure pump chamber (231) through said first connecting tube (52), said first filter (53) being mounted on said waste bag (51).
7. The thrombi removal device of claim 6, wherein a ball seat (212) is provided at a bottom of said high pressure pump assembly (21), a seal groove (2121) is provided on said ball seat (212), and said seal groove (2121) accommodates a steel ball (2122).
8. The thrombus removal device of claim 6, wherein a fluid outlet check valve (54) is provided between the waste bag (51) and the low pressure pump chamber (231), and a fluid inlet check valve (131) is provided between the catheter chamber (13) and the low pressure pump chamber (231).
9. The thrombectomy device according to claim 7 or 8, wherein the spike assembly (4) comprises a second filter (41), a second connecting tube (42), a third filter (43), the second connecting tube (42) connecting the second filter (41) and the third filter (43), the third filter (43) being connected with the high pressure pump assembly (21).
10. The thrombectomy device of claim 9, wherein the pump assembly (2) is an all-metal pump assembly.
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| CN202320023560.3U CN219289597U (en) | 2023-01-05 | 2023-01-05 | Thrombus clearing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117357208A (en) * | 2023-12-06 | 2024-01-09 | 乐普（北京）医疗器械股份有限公司 | Intravascular thrombus aspiration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117357208A (en) * | 2023-12-06 | 2024-01-09 | 乐普（北京）医疗器械股份有限公司 | Intravascular thrombus aspiration device |
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