CN115317769B - Cardiovascular expander - Google Patents
Cardiovascular expander Download PDFInfo
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- CN115317769B CN115317769B CN202211137149.5A CN202211137149A CN115317769B CN 115317769 B CN115317769 B CN 115317769B CN 202211137149 A CN202211137149 A CN 202211137149A CN 115317769 B CN115317769 B CN 115317769B
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- 230000002526 effect on cardiovascular system Effects 0.000 title claims abstract description 23
- 239000003814 drug Substances 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 3
- 210000004204 blood vessel Anatomy 0.000 abstract description 38
- 230000000740 bleeding effect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 210000004712 air sac Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 2
- 210000002489 tectorial membrane Anatomy 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 206010053649 Vascular rupture Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a cardiovascular expander, which comprises a conveying pipe and an expansion drive, wherein a bearing block is fixedly arranged at the center of the far end surface of the conveying pipe, a plurality of limit shells are distributed on the circumferential outer wall of the bearing block, limit grooves are formed in the limit shells, driving columns are arranged in the limit grooves in a limit sliding manner, the outer ends of the driving columns are connected with a supporting component, and the outer wall of the supporting component is fixedly connected with an annular air bag; the expanding assembly comprises a primary expanding assembly and a secondary expanding assembly, and the primary expanding assembly and the secondary expanding assembly are sequentially and outwards expanded under the drive of expansion driving. In the invention, the second support plate can enable the covered stent to be better attached to the blood vessel of a patient, in addition, the first support plate and the second support plate are sequentially unfolded, after the first support plate is unfolded, the condition of the blood vessel can be further judged, the risk of rupture and bleeding of the patient due to the fragility of the blood vessel is reduced, and the blood vessel can be enabled to carry out preliminary adaptation on the covered stent, so that the covered stent can be conveniently and completely unfolded to dilate the blood vessel.
Description
Technical Field
The invention relates to the technical field of equipment for treating cardiovascular diseases, in particular to a cardiovascular expander.
Background
For patients with severe stenosis or occlusion of lower extremities in a significant proportion of patients with cardiovascular and cerebrovascular visits, cardiovascular dilators are often used to dilate the stenosed vessel of the patient by the relevant healthcare provider in order to cure the patient. The patent document with the prior art publication number of CN212880585U provides a cardiovascular dilator, the device realizes the disassembly of the air bag sleeve, is convenient for workers to replace the air bag sleeve, ensures that parts except the air bag can be reused after being disinfected and cleaned, and improves the service life and the use value; meanwhile, in order to avoid the complete blockage of the blood vessel, the device is provided with a limiting sleeve outside the air sac sleeve, so that the free expansion of the two sides of the air sac sleeve is not hindered, the cardiovascular is expanded, and the blood flow is allowed to pass through the air sac sleeve without the expansion part. However, in the actual use process, the air bag sleeve only expands on two sides in an unobstructed manner, so that the covered stent cannot be completely attached to the blood vessel; meanwhile, due to the particularity of the vessel wall, the uneven stress also easily causes the rupture of the vessel, thereby causing various complications and even seriously threatening the life safety of patients.
In summary, how to achieve complete adhesion of the stent graft to the blood vessel while ensuring smooth blood flow and avoid occurrence of vascular rupture at the same time has become a urgent issue to be solved.
Disclosure of Invention
1. Technical problem to be solved
The present invention is directed to a cardiovascular stent, which solves the above-mentioned problems.
2. Technical proposal
The cardiovascular expander comprises a conveying pipe 1 and an expansion drive, and is characterized in that a bearing block 24 is fixedly arranged at the center of the far end surface of the conveying pipe 1, a plurality of limiting shells 2 are distributed on the circumferential outer wall of the bearing block 24 in an annular equidistant manner, limiting grooves 201 are formed in the limiting shells 2, driving columns 20 are arranged in the limiting grooves 201 in a limiting sliding mode, a supporting component is connected to the outer ends of the driving columns 20, and annular air bags 21 are fixedly connected to the outer walls of the supporting component; the expanding assembly comprises a primary expanding assembly and a secondary expanding assembly, and the primary expanding assembly and the secondary expanding assembly are sequentially and outwards expanded under the drive of expansion driving.
Preferably, the primary spreader assembly comprises a plurality of first support plates 6, the secondary spreader assembly comprises a plurality of second support plates 7, and the first support plates 6 and the second support plates 7 are staggered.
Preferably, the sum of the numbers of the second supporting plates 7 and the first supporting plates 6 is equal to the number of the driving columns 20, the second supporting plates 7, the first supporting plates 6 and the driving columns 20 are arranged in one-to-one correspondence, and the outer ends of the driving columns 20 are fixedly connected with the inner walls of the corresponding second supporting plates 7 or the first supporting plates 6.
Preferably, the first support plate 6 and the second support plate 7 are both arranged in an arc-shaped structure.
Preferably, the expanding drive comprises a drive column 3 and a drive sleeve 5, the drive sleeve 5 is in threaded sleeve connection with the drive column 3, the proximal end of the drive column 3 rotates to extend to the inside of the conveying pipe 1 through a bearing block 24 and the conveying pipe 1 and is coaxially connected with a first gear 16, the first gear 16 is in meshed connection with a second gear 15, the inner wall of the distal end of the conveying pipe 1 is fixedly connected with a motor 11, the output end of the motor 11 is in sleeve connection with a second gear 15 in meshed transmission with the first gear 16, and the proximal end of the drive column 3 is limited by a medicine conveying pipe 17 and is in rotary connection with the medicine conveying pipe 17.
Preferably, a plurality of second guide grooves 501 are annularly and equidistantly arranged on the circumferential outer wall of the driving sleeve 5, the second guide grooves 501 and the first support plates 6 are arranged in one-to-one correspondence, the first sliding blocks 9 are limited in the second guide grooves 501 in a sliding mode, springs 12 are arranged between the second guide grooves 501 and the corresponding first sliding blocks 9, the first connecting blocks 4 are fixedly arranged on the inner walls of the first support plates 6, and the first driving plates 8 are hinged between the corresponding first sliding blocks 9 and the first connecting blocks 4.
Preferably, the first guide grooves 502 are formed in the middle of two adjacent second guide grooves 501, the first guide grooves 502 and the second support plates 7 are arranged in one-to-one correspondence, the first guide grooves 502 are all in sliding limit, the second slide blocks 10 are all fixedly connected with the second connecting blocks 14 on the inner walls of the second support plates 7, and the second driving plates 13 are all hinged between the corresponding second slide blocks 10 and the second connecting blocks 14.
Preferably, the driving column 3 is arranged in a hollow structure, the far end part of the driving column 3 is fixedly connected with a medicine outlet pipe 23, a check valve 25 is arranged on the medicine outlet pipe 23, a medicine feeding pipe 17 is arranged in the conveying pipe 1, and the medicine feeding pipe 17 is communicated with the driving column 3.
Preferably, the distal ends of the first support plate 6 and the second support plate 7 are fixedly provided with guide plates 22, and the guide plates 22 are arranged in a fan-shaped structure.
Preferably, the air delivery pipe 19 is arranged in the delivery pipe 1, the far end of the air delivery pipe 19 is fixedly connected with a plurality of connecting hoses 18, and the other ends of the connecting hoses 18 are communicated with the inner cavity of the annular air bag 21.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
1. in the invention, after the annular air bag sleeved with the tectorial membrane bracket is sent to the appointed position in the patient, the tectorial membrane bracket is expanded by the first supporting plate, and in the process, the blood vessel of the patient can be kept in a smooth state all the time, so that the condition of the patient is prevented from being aggravated by blocking the blood vessel of the patient.
2. In the invention, the second support plate can enable the covered stent to be better attached to the blood vessel of a patient, in addition, a certain time difference exists between the expansion of the first support plate and the expansion of the second support plate, after the expansion of the first support plate, the blood vessel condition of the patient can be further judged, the risk of rupture and bleeding caused by the fragile blood vessel of the patient is reduced, and the blood vessel of the patient can be enabled to carry out preliminary adaptation on the covered stent, so that the covered stent can be completely expanded to expand the blood vessel of the patient in the follow-up process.
3. In the invention, the annular air bag can not completely block the blood vessel of a patient, and can further ensure that the covered stent is completely adhered to the inner wall of the blood vessel, so that the covered stent can play a better role.
Drawings
FIG. 1 is a schematic view of the overall structure of a cardiovascular stent as disclosed in the preferred embodiment of the present application;
FIG. 2 is a schematic view of the overall structure of a cardiovascular stent as disclosed in the preferred embodiment of the present application when expanding a blood vessel;
FIG. 3 is a schematic bottom view of the overall structure of the cardiovascular stent as it expands blood vessels as disclosed in the preferred embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a delivery tube in a cardiovascular stent as disclosed in the preferred embodiment of the present application;
FIG. 5 is a schematic view of the driving post and driving sleeve of the cardiovascular stent according to the preferred embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of a drive post in a cardiovascular dilator as disclosed in a preferred embodiment of the present application;
reference numerals in the drawings:
1. a delivery tube; 2. a limit housing; 3. a drive column; 4. a first connection block; 5. a driving sleeve; 6. a first support plate; 7. a second support plate; 8. a first driving plate; 9. a first slider; 10. a second slider; 11. a motor; 12. a spring; 13. a second driving plate; 14. a second connection block; 15. a second gear; 16. a first gear; 17. a medicine feeding tube; 18. a connecting hose; 19. a gas pipe; 20. driving the column; 21. an annular air bag; 22. a guide plate; 23. a medicine outlet pipe; 24. a receiving block; 25. a one-way valve;
201. a limit groove; 501. a second guide groove; 502. a first guide groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention become more apparent, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiments described below, together with the words of orientation, are exemplary and intended to explain the invention and should not be taken as limiting the invention.
In one broad embodiment of the invention, a cardiovascular expander comprises a conveying pipe 1 and an expansion drive, and is characterized in that a bearing block 24 is fixedly arranged at the center of the far end surface of the conveying pipe 1, a plurality of limit shells 2 are distributed on the circumferential outer wall of the bearing block 24 at equal intervals in an annular shape, limit grooves 201 are formed in the limit shells 2, driving columns 20 are arranged in the limit grooves 201 in a limit sliding mode, the outer ends of the driving columns 20 are connected with an expanding assembly, and annular air bags 21 are fixedly connected with the outer wall of the expanding assembly; the expanding assembly comprises a primary expanding assembly and a secondary expanding assembly, and the primary expanding assembly and the secondary expanding assembly are sequentially and outwards expanded under the drive of expansion driving.
Preferably, the primary spreader assembly comprises a plurality of first support plates 6, the secondary spreader assembly comprises a plurality of second support plates 7, and the first support plates 6 and the second support plates 7 are staggered.
Preferably, the sum of the numbers of the second supporting plates 7 and the first supporting plates 6 is equal to the number of the driving columns 20, the second supporting plates 7, the first supporting plates 6 and the driving columns 20 are arranged in one-to-one correspondence, and the outer ends of the driving columns 20 are fixedly connected with the inner walls of the corresponding second supporting plates 7 or the first supporting plates 6.
Preferably, the first support plate 6 and the second support plate 7 are both arranged in an arc-shaped structure.
Preferably, the expanding drive comprises a drive column 3 and a drive sleeve 5, the drive sleeve 5 is in threaded sleeve connection with the drive column 3, the proximal end of the drive column 3 rotates to extend to the inside of the conveying pipe 1 through a bearing block 24 and the conveying pipe 1 and is coaxially connected with a first gear 16, the first gear 16 is in meshed connection with a second gear 15, the inner wall of the distal end of the conveying pipe 1 is fixedly connected with a motor 11, the output end of the motor 11 is in sleeve connection with a second gear 15 in meshed transmission with the first gear 16, and the proximal end of the drive column 3 is limited by a medicine conveying pipe 17 and is in rotary connection with the medicine conveying pipe 17.
Preferably, a plurality of second guide grooves 501 are annularly and equidistantly arranged on the circumferential outer wall of the driving sleeve 5, the second guide grooves 501 and the first support plates 6 are arranged in one-to-one correspondence, the first sliding blocks 9 are limited in the second guide grooves 501 in a sliding mode, springs 12 are arranged between the second guide grooves 501 and the corresponding first sliding blocks 9, the first connecting blocks 4 are fixedly arranged on the inner walls of the first support plates 6, and the first driving plates 8 are hinged between the corresponding first sliding blocks 9 and the first connecting blocks 4.
Preferably, the first guide grooves 502 are formed in the middle of two adjacent second guide grooves 501, the first guide grooves 502 and the second support plates 7 are arranged in one-to-one correspondence, the first guide grooves 502 are all in sliding limit, the second slide blocks 10 are all fixedly connected with the second connecting blocks 14 on the inner walls of the second support plates 7, and the second driving plates 13 are all hinged between the corresponding second slide blocks 10 and the second connecting blocks 14.
Preferably, the driving column 3 is arranged in a hollow structure, the far end part of the driving column 3 is fixedly connected with a medicine outlet pipe 23, a check valve 25 is arranged on the medicine outlet pipe 23, a medicine feeding pipe 17 is arranged in the conveying pipe 1, and the medicine feeding pipe 17 is communicated with the driving column 3.
Preferably, the distal ends of the first support plate 6 and the second support plate 7 are fixedly provided with guide plates 22, and the guide plates 22 are arranged in a fan-shaped structure.
Preferably, the air delivery pipe 19 is arranged in the delivery pipe 1, the far end of the air delivery pipe 19 is fixedly connected with a plurality of connecting hoses 18, and the other ends of the connecting hoses 18 are communicated with the inner cavity of the annular air bag 21.
The invention will be described in further detail below with reference to the attached drawings, which illustrate preferred embodiments of the invention.
Referring to fig. 1-6, a cardiovascular expander comprises a conveying pipe 1, wherein an expansion drive and a plurality of driving columns 20 are installed at the distal end of the conveying pipe 1, wherein a first supporting plate 6 is fixedly installed at the outer ends of part of the driving columns 20, the first supporting plate 6 is in an arc-shaped structure, and the expansion drive can drive the first supporting plate 6 and the driving columns 20 connected with the first supporting plate 6 to move synchronously along the radial direction of the conveying pipe 1.
In this embodiment, the medical staff sleeves the covered stent on the outer side of the annular air bag 21, then sends the covered stent into the appointed position in the blood vessel of the patient, and under the action of expansion driving, part of the driving posts 20 drive the first supporting plate 6 to expand outwards synchronously, so that the covered stent expands to be in contact with the blood vessel of the patient, and the blood vessel of the patient is expanded. In the process, the blood in the blood vessel of the patient can always keep a flowing state, and the blocking of the blood vessel of the patient is avoided to aggravate the illness state of the patient.
Specifically, the expansion drive comprises a drive mechanism, a drive sleeve 5 arranged on one side of the conveying pipe 1 and a bearing block 24 fixedly arranged at the center of the far end surface of the conveying pipe 1, wherein a plurality of limit shells 2 corresponding to the drive columns 20 one by one are fixedly arranged on the circumferential outer wall of the bearing block 24 at equal intervals in an annular shape, limit grooves 201 are formed in the limit shells 2, and the drive columns 20 are limited by the corresponding limit grooves 201 and are in sliding connection with the corresponding limit grooves 201;
the circumference outer wall of the driving sleeve 5 is annular and equidistant, a plurality of first sliding blocks 9 corresponding to the first supporting plate 6 are arranged on the circumference outer wall of the driving sleeve, first connecting blocks 4 are fixedly arranged on the inner wall of the first supporting plate 6, first driving plates 8 are hinged between the corresponding first sliding blocks 9 and the first connecting blocks 4, and the driving mechanism can drive the driving sleeve 5 to linearly move.
In this embodiment, under the action of the driving mechanism, the driving sleeve 5 drives the first slider 9 to move to one side, and under the connection action of the first driving plate 8, the plurality of first supporting plates 6 move synchronously along the radial direction of the conveying pipe 1.
Further, the driving mechanism comprises a rotating mechanism and a driving column 3, the driving sleeve 5 is in threaded connection with the driving column 3, the rotating mechanism can drive the driving column 3 to rotate, and the proximal end of the driving column 3 rotates to extend to the inside of the conveying pipe 1 through the bearing block 24 and the conveying pipe 1.
In this embodiment, under the action of the rotating mechanism, the driving post 3 rotates, and the driving sleeve 5 is in threaded connection with the driving post 3, so that the driving sleeve 5 moves linearly under the limit of the driving post 20 and the limit groove 201.
Still further, the distal end of conveyer pipe 1 still installs secondary and struts the subassembly, and the secondary struts the subassembly and includes actuating mechanism and a plurality of and first backup pad 6 second backup pad 7 of mutual staggered arrangement, and second backup pad 7 is all fixed with corresponding drive post 20 connection, and second backup pad 7 is the arc structure setting, and actuating mechanism can drive second backup pad 7 along conveyer pipe 1 radial synchronous movement.
It should be noted that the sum of the numbers of the second support plates 7 and the first support plates 6 is equal to the number of the driving posts 20, and the second support plates 7 and the first support plates 6 are respectively connected with the driving posts 20 in a one-to-one correspondence manner.
In the present embodiment, under the action of the driving mechanism, the first support plate 6 is unfolded first, the second support plate 7 is unfolded later, and the second support plate 7 realizes further expansion of the blood vessel of the patient; when the two are unfolded, a certain time difference exists, after the first supporting plate 6 is unfolded, medical staff can further judge the vascular condition of a patient, the risk of rupture and bleeding caused by the fragility of the blood vessel of the patient is reduced, meanwhile, the blood vessel of the patient can be primarily adapted to the covered stent, and the covered stent can be conveniently and completely unfolded to dilate the blood vessel of the patient.
Further, the driving mechanism includes a plurality of first guide grooves 502 and a plurality of second connection blocks 14 corresponding to the first guide grooves 502 one by one, the first guide grooves 502 are annularly and equally spaced on the circumferential outer wall of the driving sleeve 5, the second connection blocks 14 are correspondingly arranged with the second support plates 7 one by one, and the second connection blocks 14 are fixedly connected on the inner walls of the corresponding second support plates 7; the first guide grooves 502 are respectively and slidably connected with a second sliding block 10, and a second driving plate 13 is respectively hinged between the corresponding second sliding blocks 10 and the second connecting blocks 14.
When not expanded, the second slider 10 and the first slider 9 are positioned at the proximal end of the first guide groove 502 and the second guide groove 501, respectively.
In this embodiment, when the second slider 10 abuts against the distal end inner wall of the first guide groove 502 during the movement of the driving sleeve 5, the second slider 10 starts to follow the movement of the driving sleeve 5, and the second support plate 7 starts to expand outwards under the connection action of the second driving plate 13.
It should be noted that, the circumferential outer wall of the driving sleeve 5 is further provided with a plurality of second guide grooves 501 corresponding to the first sliding blocks 9 one by one, the first sliding blocks 9 are limited by the corresponding second guide grooves 501 and are slidably connected with the corresponding second guide grooves 501, and a plurality of springs 12 are fixedly installed between the second guide grooves 501 and the corresponding first sliding blocks 9.
In the embodiment, when the driving sleeve 5 moves, the first supporting plate 6 expands outwards synchronously gradually, at this time, the spring 12 is used for transmitting force, and can relieve the effect of the first driving plate 8 on the first supporting plate 6, so that the buffer between the covered stent and the inner wall of the blood vessel is realized, and the irrecoverable damage to the wall of the blood vessel caused by excessive force is avoided; when the first supporting plate 6 moves to the outermost side, the first sliding block 9 further compresses the spring 12 to change the relative position of the spring and the driving sleeve 5, so that the situation of blocking is effectively avoided.
It is worth noting that the far end of the conveying pipe 1 is also provided with an annular air bag 21, the inner wall of the annular air bag 21 is fixedly connected with the outer walls of the first supporting plate 6 and the second supporting plate 7, the conveying pipe 1 is internally provided with a conveying pipe 19, the far end of the conveying pipe 19 is fixedly connected with a plurality of connecting hoses 18, and the other ends of the connecting hoses 18 are communicated with the inner cavity of the annular air bag 21.
In this embodiment, after the first support plate 6 and the second support plate 7 are fully opened, the air pipe 19 supplies air into the annular air bag 21, and on the premise of not fully blocking the blood vessel of the patient, the film covered stent is further ensured to be fully attached to the inner wall of the blood vessel, and the film covered stent is ensured to play a better role.
In addition, the driving column 3 is arranged in a hollow structure, the medicine outlet pipe 23 is fixedly connected to the distal end of the driving column 3, the check valve 25 is arranged on the medicine outlet pipe 23, the medicine delivery pipe 17 is arranged in the conveying pipe 1, and the medicine delivery pipe 17 is communicated with the driving column 3. In the embodiment, medical staff can connect the medicine delivery pipe 17 with external medicine supply equipment, so that medicines can be directly delivered into the blood vessel of a patient, the purposes of treating thrombus and the like are achieved, and the treatment effect is effectively improved. The check valve 25 can prevent the medicine outlet pipe 23 from being blocked.
In addition, the rotating mechanism comprises a motor 11 fixedly arranged on the inner wall of the distal end of the conveying pipe 1 and a first gear 16 sleeved on the driving column 3, the end part of the output end of the motor 11 is fixedly connected with a second gear 15, the first gear 16 is meshed with the second gear 15, and the proximal end of the driving column 3 is limited by and rotationally connected with a medicine conveying pipe 17.
In the present embodiment, the second gear 15 rotates under the action of the motor 11, and the first gear 16 is engaged with the second gear 15, so that the second gear 15 drives the driving post 3 to rotate.
In addition, the end parts of the first support plate 6 and the second support plate 7 are fixedly provided with guide plates 22, and the guide plates 22 are arranged in a fan-shaped structure.
In this embodiment, all of the guide plates 22 are arranged in a tapered configuration when combined, so that the medical staff can conveniently send the delivery tube 1 into the blood vessel of the patient.
Working principle: when the device is needed to be used, the covered stent is sleeved outside the annular air bag 21, the air pipe 19 is connected with air supply equipment, the medicine delivery pipe 17 is connected with external medicine supply equipment, and then the covered stent is sent to a designated position in a blood vessel;
starting the motor 11, driving the driving column 3 by the second gear 15, at this time, under the action of the second driving plate 13 and the first driving plate, the driving column 3 can only drive the driving sleeve 5 to do axial movement, under the action of the spring 12, the driving sleeve 5 drives the first sliding block 9 to start moving, and the plurality of first supporting plates 6 start to synchronously move outwards along the limiting groove 201, so that the film-covered stent is initially unfolded;
along with the movement of the driving sleeve 5, when the second sliding block 10 is abutted against the inner wall of the distal end of the first guide groove 502, the second sliding block 10 starts to move along with the driving sleeve 5, and under the connection action of the second driving plate 13, the second supporting plate 7 starts to expand outwards;
in this process, under the action of the springs 12, after the plurality of first support plates 6 are moved to the outermost side, the first slider 9 starts to move reversely; after the vessel wall is gradually adapted to the support of the first support plate 6, the second drive plate 13 is moved to the outermost side and comes into contact with the vessel wall.
Then, the air delivery pipe 19 delivers air into the annular air bag 21, and the complete fitting of the covered stent and the inner wall of the blood vessel is further ensured while the blood vessel of the patient is not completely blocked. Thus, the operation of expanding the blood vessel of the patient can be completed.
Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The cardiovascular expander comprises a conveying pipe (1) and an expansion drive, and is characterized in that a bearing block (24) is fixedly arranged at the center of the far end surface of the conveying pipe (1), a plurality of limit shells (2) are distributed on the circumferential outer wall of the bearing block (24) at equal intervals in an annular shape, limit grooves (201) are formed in the limit shells (2), driving columns (20) are driven in the limit grooves (201) in a limiting sliding mode, an expanding assembly is connected to the outer ends of the driving columns (20), and annular air bags (21) are fixedly connected to the outer wall of the expanding assembly; the expanding assembly comprises a primary expanding assembly and a secondary expanding assembly, and the primary expanding assembly and the secondary expanding assembly are sequentially expanded outwards under the drive of expansion driving;
the primary opening assembly comprises a plurality of first supporting plates (6), the secondary opening assembly comprises a plurality of second supporting plates (7), and the plurality of first supporting plates (6) and the plurality of second supporting plates (7) are arranged in a staggered manner;
the sum of the numbers of the second support plates (7) and the first support plates (6) is equal to the number of the driving columns (20), the second support plates (7), the first support plates (6) and the driving columns (20) are arranged in one-to-one correspondence, and the outer ends of the driving columns (20) are fixedly connected with the inner walls of the corresponding second support plates (7) or the first support plates (6);
the expanding drive comprises a drive column (3) and a drive sleeve (5), the drive sleeve (5) is in threaded sleeve connection with the drive column (3), the proximal end of the drive column (3) rotates to extend into the conveying pipe (1) through a bearing block (24) and the conveying pipe (1) and is coaxially connected with a first gear (16), the first gear (16) is in meshed connection with a second gear (15), the inner wall of the distal end of the conveying pipe (1) is fixedly connected with a motor (11), the output end of the motor (11) is in sleeve connection with a second gear (15) in meshed transmission with the first gear (16), and the proximal end of the drive column (3) is limited to be in rotary connection with a medicine conveying pipe (17);
a plurality of second guide grooves (501) are formed in the circumferential outer wall of the driving sleeve (5) in an annular equidistant mode, the second guide grooves (501) are arranged in one-to-one correspondence with the first supporting plates (6), first sliding blocks (9) are limited in the second guide grooves (501) in a sliding mode, springs (12) are arranged between the second guide grooves (501) and the corresponding first sliding blocks (9), first connecting blocks (4) are fixedly arranged on the inner walls of the first supporting plates (6), and first driving plates (8) are hinged between the corresponding first sliding blocks (9) and the first connecting blocks (4);
first guide slot (502) have all been seted up in the centre of two adjacent second guide slots (501), and first guide slot (502) set up with second backup pad (7) one-to-one, and first guide slot (502) all slide spacing have second slider (10), all fixedly connected with second connecting block (14) on the inner wall of second backup pad (7), all articulate second drive plate (13) between corresponding second slider (10) and the second connecting block (14).
2. A cardiovascular stent according to claim 1, characterized in that the first support plate (6) and the second support plate (7) are each arranged in an arc-shaped configuration.
3. The cardiovascular expander according to claim 1, wherein the driving column (3) is arranged in a hollow structure, a medicine outlet pipe (23) is fixedly connected to the distal end of the driving column (3), a one-way valve (25) is arranged on the medicine outlet pipe (23), a medicine delivery pipe (17) is arranged in the conveying pipe (1), and the medicine delivery pipe (17) is communicated with the driving column (3).
4. A cardiovascular stent according to any of claims 1-2, characterized in that the distal ends of the first support plate (6) and the second support plate (7) are fixedly provided with guide plates (22), the guide plates (22) being arranged in a fan-like configuration.
5. The cardiovascular expander according to claim 4, wherein a gas pipe (19) is installed in the conveying pipe (1), a plurality of connecting hoses (18) are fixedly connected to the far end of the gas pipe (19), and the other ends of the connecting hoses (18) are communicated with the inner cavity of the annular air bag (21).
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| CN115804906B (en) * | 2022-11-14 | 2024-02-06 | 心擎医疗（苏州）股份有限公司 | Blood pump |
| CN117752481A (en) * | 2023-12-26 | 2024-03-26 | 日照天一生物医疗科技有限公司 | Completely degradable magnesium alloy cardiovascular stent |
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