CN215841130U - Balloon microcatheter capable of performing balloon dilatation and stent pushing - Google Patents
Balloon microcatheter capable of performing balloon dilatation and stent pushing Download PDFInfo
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- CN215841130U CN215841130U CN202120669629.0U CN202120669629U CN215841130U CN 215841130 U CN215841130 U CN 215841130U CN 202120669629 U CN202120669629 U CN 202120669629U CN 215841130 U CN215841130 U CN 215841130U
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- 210000005077 saccule Anatomy 0.000 abstract description 5
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- 238000002601 radiography Methods 0.000 description 6
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- 238000002651 drug therapy Methods 0.000 description 1
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- 238000012800 visualization Methods 0.000 description 1
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Abstract
The utility model provides a balloon microcatheter capable of performing balloon dilatation and stent pushing, which comprises an operation end and a catheter body which are connected, wherein the catheter body comprises an inner catheter, a balloon outer catheter and a balloon; the inner catheter is of a hollow structure, and an inner cavity is formed in the inner catheter; the inner catheter is arranged in the balloon outer catheter and is coaxial with the balloon outer catheter; an outer cavity is formed between the inner catheter and the balloon outer catheter; the saccule is arranged on the saccule outer catheter and close to the far end of the saccule outer catheter, is communicated with the outer cavity and can be inflated through the outer cavity; the operation end is arranged at the near end of the catheter body and comprises a main channel and a side hole; the main channel is communicated with the inner cavity, and the side hole is communicated with the outer cavity. The balloon microcatheter provided by the utility model can be used for balloon dilatation and stent implantation through one microcatheter, so that the use of a plurality of microcatheters and a plurality of micro guide wires is omitted, the operation time is shortened, and the operation pressure of an operator is reduced; the cost required by the operation is saved, and the economic pressure of the patient is reduced.
Description
Technical Field
The utility model relates to the technical field of interventional therapy catheter medical instruments, in particular to a balloon microcatheter capable of performing balloon expansion and stent pushing.
Background
At present, for serious intracranial artery stenosis, intravascular intervention is generally selected under the condition that the drug therapy is ineffective. The operation modes of the interventional therapy mainly include the following three modes: 1) pure balloon dilatation; 2) stent implantation; 3) balloon dilatation and stenting. Among them, balloon dilatation and stenting are used in many cases.
The specific operation process of balloon dilatation and stent implantation comprises the following steps:
1) carrying a micro-catheter A with the length of 200cm to a distal normal vascular cavity through an occlusion section, and carrying out radiography through the micro-catheter A to confirm that the micro-catheter A is positioned in the vascular cavity;
2) removing the micro guide wire A, and performing radiography through the micro catheter A to confirm that the micro catheter is positioned in the vascular cavity;
3) conveying a micro guide wire B with the length of 300cm to the far end of the occlusion section in the vascular cavity through the micro catheter A, and then withdrawing the micro catheter A to leave the micro guide wire B in the vascular cavity;
4) conveying a saccule to the occlusion section along the micro guide wire B, expanding the occlusion section, withdrawing the saccule after expansion, carrying out radiography, and confirming that the occlusion vessel is opened;
5) conveying a microcatheter B into a normal blood vessel cavity at the far end of the stenosis along the micro guide wire B, and removing the micro guide wire B;
6) pushing a stent into the lumen of the occlusion section by using the micro guide wire C through the micro catheter B, releasing, withdrawing the micro catheter B, performing radiography, and confirming that the position of the stent is good.
7) And (5) removing the micro guide wire C for pushing the stent, removing other catheters, reconstructing the image, and finishing the operation when the blood vessel is recovered to be normal.
Therefore, one-time complete balloon dilatation and stent implantation interventional treatment comprises a plurality of steps, takes several hours, uses more devices, and consumes the energy of an operator and the expense of a patient. Therefore, there is a need for a vascular interventional treatment device that can reduce part of the surgical procedure and achieve the same surgical effect.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the balloon microcatheter which can combine the balloon expansion function with the stent placement function.
The utility model adopts the following technical scheme for solving the technical problems:
the utility model provides a sacculus microcatheter capable of carrying out sacculus expansion and pushing a stent, which comprises an operation end and a catheter body which are connected, wherein the catheter body comprises:
the inner catheter is of a hollow structure, and an inner cavity is formed in the inner catheter;
the inner catheter is arranged in the balloon outer catheter and is coaxial with the balloon outer catheter; an outer cavity is formed between the inner catheter and the balloon outer catheter; and
the sacculus is arranged on the sacculus outer catheter and is close to the far end of the sacculus outer catheter, is communicated with the outer cavity and can be inflated through the outer cavity;
the operation end is arranged at the near end of the catheter body and comprises a main channel and a side hole; the main channel is communicated with the inner cavity, and the side hole is communicated with the outer cavity;
the balloon outer catheter is divided into three sections according to the size of the outer diameter: a proximal portion, an intermediate portion, and a distal portion; the outer diameter of the proximal portion is the same and greater than the outer diameter of the distal portion; the intermediate portion has an outer diameter that decreases in a proximal to distal direction.
Further, the length of the catheter body is 100-300 cm.
Further, the length of the proximal end part is 50-90 cm, and the outer diameter is 0.9-1.1 mm; the length of the distal end part is 60-100 cm, and the outer diameter is 0.8-1.0 mm.
Further, the inner diameter of the inner conduit is 0.5-0.8 mm.
Further, the balloon is a semi-compliant balloon.
Further, the distance between the far end of the catheter body and the balloon is more than or equal to 10 mm.
Furthermore, both ends of the balloon and the far end of the balloon outer catheter are respectively provided with a marking line.
Further, the tube walls of the inner catheter and the balloon outer catheter each comprise:
the pipe wall framework is formed by weaving metal wires with memory effect; and
and the coating is sprayed on the inner surface and the outer surface of the pipe wall framework and is made of polyethylene.
Furthermore, hydrophilic films are coated on the inner layer and the outer layer of the pipe wall.
Further, the far ends of the inner catheter and the balloon outer catheter are connected through an inclined plane, and the outer cavity is sealed;
the inclined plane and the side wall of the inner conduit form an acute angle.
By adopting the technical scheme, compared with the prior art, the utility model has the following technical effects:
the utility model provides a balloon microcatheter capable of performing balloon dilatation and stent pushing, wherein a catheter body is designed into a double-layer catheter of an inner catheter and a balloon outer catheter, the balloon is arranged on the balloon outer catheter, and an outer cavity is formed between the outer catheter and the inner catheter and used for filling the balloon to achieve the purpose of balloon dilatation; an inner cavity is formed in the inner catheter and is used for penetrating through the guide wire to carry out radiography and achieving the purpose of implanting a stent, so that balloon expansion and stent implantation are realized through one conduction, the use of a plurality of catheters and a plurality of guide wires is omitted, on one hand, the operation time is greatly shortened, and the operation pressure of an operator is reduced; on the other hand, the cost required by the operation is greatly saved, and the economic pressure of the patient is reduced.
Drawings
FIG. 1 is a schematic diagram of an external structure of a balloon microcatheter capable of performing balloon expansion and stent pushing according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a balloon microcatheter with balloon expandable and stent pusher according to one embodiment of the present invention;
wherein the reference numerals are: 10-operation end, 11-main channel, 12-side hole, 20-catheter body, 21-balloon outer catheter, 211-marking line, 22-inner catheter, 23-outer cavity, 24-inner cavity and 30-balloon.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings for better understanding of the present invention, but not to limit the scope of the present invention.
As shown in fig. 1 to 2, the present invention provides a balloon microcatheter capable of performing balloon expansion and stent pushing, which comprises a manipulation end 10 and a catheter body 20 connected to each other.
The catheter body 20 includes an inner catheter 22, a balloon outer catheter 21, and a balloon 30. The inner conduit 22 is a hollow structure defining a lumen 24 therein. The lumen 24 is used to perform steps such as passing a micro-guide wire, performing visualization, and pushing a stent.
The balloon outer catheter 21 is arranged outside the inner catheter 22 and is coaxial with the inner catheter; an outer cavity 23 is formed between the inner catheter 22 and the balloon outer catheter 21. The balloon 30 is disposed on the balloon outer catheter 21 near its distal end, and communicates with the outer lumen 23, and the balloon 30 is inflated through the outer lumen 23.
The balloon 30 is a semi-compliant balloon, and the diameter of the compliant balloon is obviously increased along with the increase of the expansion pressure, so that the compliant balloon is not suitable for being applied to interventional therapy operations such as coronary arteries and the like; the diameter of the non-compliant balloon is not obviously changed along with the increase of the expansion pressure, the non-compliant balloon has higher explosion pressure and is mainly used for post-expansion after the stent is placed into a surgery, and pre-expansion of lesions such as hard lesion, in-stent restenosis and the like; the semi-compliant balloon has a diameter that increases with expansion pressure between the compliant and non-compliant balloons for pre-expansion of the lesion, suitable for expansion of the occluded vessel and preparation for subsequent stenting.
The operating end 10 is provided in the form of a grip that can be fixedly operated for external operation. The operating end 10 is arranged at the proximal end of the catheter body 20 and comprises a main channel 11 and a side hole 12; the main channel 11 communicates with the lumen 24 for guiding the wire, imaging and pushing the stent, etc.; the side holes 12 communicate with the outer lumen 23 for injecting a fluid to inflate the balloon 30 and open the vessel occlusion.
The proximal ends of the inner catheter 22 and the balloon outer catheter 21 are connected with the operation end 10; the inner catheter 22 is connected with the distal end of the balloon outer catheter 21 through a bevel, and the bevel forms an acute angle, preferably 45 degrees with the side wall of the inner catheter 22, so that the catheter body 20 can enter conveniently and can play a role in guiding at the position of passing through the bend of the blood vessel.
The balloon outer catheter 21 is divided into three sections according to the size of the outer diameter: a proximal portion, an intermediate portion, and a distal portion; the outer diameter of the proximal portion is the same and greater than the outer diameter of the distal portion; the intermediate portion has an outer diameter that decreases in a proximal to distal direction. The diameter is the same everywhere on the inner conduit 22. In a preferred embodiment of the present invention, the length of the catheter body 20, i.e. the length of the balloon outer catheter 21 and the length of the balloon inner catheter 22 are both 100-300 cm, preferably 150 cm.
The distance between the far end of the catheter body 20 and the balloon 30 is more than or equal to 10mm, namely the length of the part of the balloon outer catheter 21 and the part of the balloon inner catheter 22 extending out of the balloon 30 is more than or equal to 10mm, so that the delivery of the stent is facilitated.
The two ends of the balloon 30 and the far end of the balloon outer catheter 21 are respectively provided with a marking line 211, so that after the balloon microcatheter enters the blocked vascular cavity, the catheter body 20 and the balloon 30 can be conveniently positioned, and reference is provided for pushing and releasing the position of the stent. Preferably, the mark line 211 is a mark of mark.
The length of the proximal end part of the balloon outer catheter 21 is 50-90 cm, preferably 70cm, the outer diameter is 0.9-1.1 mm, and preferably 3.2F is 1.1 mm. The length of the far end part of the balloon outer catheter 21 is 60-100 cm, preferably 80cm, and the outer diameter is 0.8-1.0 mm, preferably 2.7F, namely 0.91 mm.
The inner diameter of the inner catheter 22, i.e., the diameter of the inner lumen 24, is 0.5-0.8 mm, preferably 0.69 mm. The outer diameter and the inner diameter of the balloon outer catheter 21 and the inner catheter 22 can be adjusted as required by those skilled in the art, but the adjustment is performed without affecting the interventional use of the balloon microcatheter.
The tube walls of the inner catheter 22 and the balloon outer catheter 21 both comprise a tube wall skeleton and a coating. The tube wall framework is woven by metal wires with memory effect, such as Ni-Ti shape memory alloy, which has good biocompatibility and mechanical property similar to the vessel wall, and is convenient for pushing and operating the catheter body 20. The coating is sprayed on the inner surface and the outer surface of the pipe wall framework, and the material of the coating is polyethylene, and other coating materials in the prior art can also be selected.
The inner surface and the outer surface of the tube wall of the inner catheter 22 and the outer surface of the balloon catheter 21 are coated with hydrophilic films, so that when entering human tissues, the tube wall with better hydrophilicity can effectively reduce the friction between the tube wall and the human tissues, and secondary damage caused by injury to the human tissues such as the blood vessel wall is avoided.
The application method of the balloon microcatheter capable of performing balloon dilatation and stent pushing provided by the utility model comprises the following steps: firstly, a micro guide wire with a balloon micro catheter enters a vascular cavity, the distal normal vascular cavity is reached through an occlusion end, the through hole inner cavity 24 is subjected to radiography, and the catheter body 20 is confirmed to be positioned in the vascular cavity and the proper position through mark 211; then, the balloon 30 is inflated through the side hole 12 and the outer cavity 23 to expand the balloon, and contrast is performed to confirm that the occluded blood vessel is open; then, the micro guide wire is withdrawn, the micro guide wire is conveyed to the far end along the catheter body 10, and a stent is pushed through the micro guide wire; finally, the contrast is carried out through the inner cavity 24, the good position of the stent is confirmed under the assistance of the marking line 211, the micro guide wire B and the balloon micro catheter are withdrawn, and the operation is completed.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications or alterations to this practice will occur to those skilled in the art and are intended to be within the scope of this invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (10)
1. A balloon microcatheter for balloon-expandable and stented, comprising a connected operating end (10) and a catheter body (20), the catheter body (20) comprising:
the inner catheter (22) is of a hollow structure, and an inner cavity (24) is formed in the inner catheter;
a balloon outer catheter (21), the inner catheter (22) being disposed within the balloon outer catheter (21) and coaxial with the balloon outer catheter (21); an outer cavity (23) is formed between the inner catheter (22) and the balloon outer catheter (21); and
a balloon (30) disposed on the balloon outer catheter (21) near the distal end thereof, communicating with the outer lumen (23), the balloon (30) being inflatable through the outer lumen (23);
the operating end (10) is arranged at the proximal end of the catheter body (20) and comprises a main channel (11) and a side hole (12); the main channel (11) communicating with the inner chamber (24), the lateral holes (12) communicating with the outer chamber (23);
the balloon outer catheter (21) is divided into three sections according to the size of the outer diameter: a proximal portion, an intermediate portion, and a distal portion; the outer diameter of the proximal portion is the same and greater than the outer diameter of the distal portion; the intermediate portion has an outer diameter that decreases in a proximal to distal direction.
2. The balloon microcatheter of claim 1, wherein the catheter body (20) has a length of 100-300 cm.
3. The balloon microcatheter of claim 2, wherein the proximal portion has a length of 50-90 cm and an outer diameter of 0.9-1.1 mm; the length of distal end portion is 60 ~ 100cm, and the external diameter is 0.8 ~ 1.0 mm.
4. The balloon microcatheter according to claim 1, wherein the inner diameter of the inner catheter (22) is 0.5-0.8 mm.
5. The balloon microcatheter of claim 1, wherein the balloon (30) is a semi-compliant balloon.
6. The balloon microcatheter of claim 1, wherein the distal end of the catheter body (20) is at a distance greater than or equal to 10mm from the balloon (30).
7. The balloon microcatheter according to claim 1, wherein both ends of the balloon (30) and the distal end of the balloon outer catheter (21) are provided with a marking line (211), respectively.
8. The balloon microcatheter according to claim 1, wherein the tube walls of the inner catheter (22) and the balloon outer catheter (21) each comprise:
the pipe wall framework is formed by weaving metal wires with memory effect; and
and the coating is sprayed on the inner surface and the outer surface of the pipe wall framework and is made of polyethylene.
9. The balloon microcatheter of claim 8, wherein both the inner and outer layers of the wall are coated with a hydrophilic film.
10. The balloon microcatheter according to claim 1, wherein the distal ends of the inner catheter (22) and the balloon outer catheter (21) are connected by a bevel and seal the outer lumen (23);
the inclined surface forms an acute angle with the side wall of the inner conduit (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120669629.0U CN215841130U (en) | 2021-04-01 | 2021-04-01 | Balloon microcatheter capable of performing balloon dilatation and stent pushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120669629.0U CN215841130U (en) | 2021-04-01 | 2021-04-01 | Balloon microcatheter capable of performing balloon dilatation and stent pushing |
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| Publication Number | Publication Date |
|---|---|
| CN215841130U true CN215841130U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120669629.0U Expired - Fee Related CN215841130U (en) | 2021-04-01 | 2021-04-01 | Balloon microcatheter capable of performing balloon dilatation and stent pushing |
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| CN (1) | CN215841130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113398442A (en) * | 2021-07-28 | 2021-09-17 | 茂名市人民医院 | Neurovascular semi-compliance balloon dilatation micro-catheter |
-
2021
- 2021-04-01 CN CN202120669629.0U patent/CN215841130U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113398442A (en) * | 2021-07-28 | 2021-09-17 | 茂名市人民医院 | Neurovascular semi-compliance balloon dilatation micro-catheter |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20220218 |