CN112870529B - Multi-channel catheter - Google Patents
Multi-channel catheter Download PDFInfo
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- CN112870529B CN112870529B CN202011010211.5A CN202011010211A CN112870529B CN 112870529 B CN112870529 B CN 112870529B CN 202011010211 A CN202011010211 A CN 202011010211A CN 112870529 B CN112870529 B CN 112870529B
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- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000010412 perfusion Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000012800 visualization Methods 0.000 claims 1
- 239000003814 drug Substances 0.000 abstract description 55
- 230000003902 lesion Effects 0.000 abstract description 37
- 229940079593 drug Drugs 0.000 abstract description 29
- 208000031481 Pathologic Constriction Diseases 0.000 abstract description 4
- 208000005189 Embolism Diseases 0.000 abstract description 3
- 210000001124 body fluid Anatomy 0.000 abstract description 3
- 239000010839 body fluid Substances 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 238000012377 drug delivery Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 230000036262 stenosis Effects 0.000 abstract description 2
- 208000037804 stenosis Diseases 0.000 abstract description 2
- 238000001802 infusion Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 210000004204 blood vessel Anatomy 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229940043263 traditional drug Drugs 0.000 description 2
- 210000003445 biliary tract Anatomy 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000008177 pharmaceutical agent Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 210000003708 urethra Anatomy 0.000 description 1
Classifications
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- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/004—Multi-lumen catheters with stationary elements characterized by lumina being arranged circumferentially
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/105—Balloon catheters with special features or adapted for special applications having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Child & Adolescent Psychology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a multichannel catheter which comprises a tip, a bag, a tube cavity and a connector, wherein the front end of the tube cavity is communicated with the tip, a hole is formed in the outer surface of the tip, the bag is circumferentially arranged at the position, close to the tip, of the tube cavity, the rear end of the tube cavity is communicated with the connector, at least two inner tube cavities are arranged in the tube cavity, and at least two channels are formed in the connector. The multichannel catheter provided by the invention can realize drug delivery into the cavity channel through the balloon catheter under the protection of the guide wire, can realize simultaneous large-scale targeted delivery of various drugs through the balloon catheter in different modes, and reduces the risk of blocking body fluid circulation or lumen embolism. The medicine can be used for effectively treating the intracavity stenosis by pouring the medicine reagent, simultaneously the filling of the bag can temporarily block the liquid circulation in the cavity, so that the medicine can be fully absorbed at the lesion part, and the medicine has the characteristics of controllable medicine quantity, quick response, simple operation and the like, and can be used for treating the lesions of the human body cavities.
Description
Technical Field
The invention relates to a medical catheter, in particular to a multichannel catheter, and belongs to the technical field of medical instruments.
Background
Interventional therapy surgery is an important means for treating stenoses or obstructive diseases in human body lumens such as blood vessels. Balloon catheters are one of the main instruments for dilating a narrow or blocked part of a human body cavity such as a blood vessel and opening the cavity. Balloon catheters often require simultaneous delivery of drugs through the catheter to the lumen during clinical use. The traditional balloon catheter is of a two-channel structure, and the two channels are respectively used for passing the guide wire and inflating and expanding the balloon.
At this time, it is necessary to withdraw the guidewire and inject the drug into the lumen through the guidewire channel of the balloon catheter. Although the drug is delivered into the lumen via the catheter, there are a number of risks. First, drug injection can create impact forces that cause the balloon catheter to vibrate within the lumen and the balloon catheter tip to become lodged, which can damage the lumen wall, risking occlusion of the lumen. Secondly, as there is no guide wire protection, the risk of acute occlusion at the distal end of the lumen caused by drug injection is greatly increased, and once the acute occlusion occurs, the guide wire needs to be re-fed, the operation is complex, and the risk is high.
Drug eluting balloon catheters are emerging devices for the treatment of stenoses or occlusive diseases in human body lumens such as blood vessels. Traditional drug eluting balloon catheters are coated with a drug coating on the balloon surface of the balloon catheter. When the balloon containing the drug coating expands the local part of the cavity, the drug coated on the surface of the balloon can be released to the wall of the cavity of the lesion part, thereby achieving the effects of targeted drug delivery and drug effect. However, the type and the dosage of the drug to be delivered are limited by the structure, and only one drug can be delivered generally, and the dosage to be delivered is very low, so that the therapeutic effect is unsatisfactory. In addition, the traditional drug eluting balloon catheter can remain coated particles in the distal lumen of the target lesion after local drug delivery, and risks of affecting body fluid circulation and even causing lumen embolism exist.
Disclosure of Invention
In order to solve the problems, the invention provides a multichannel catheter, which has the following technical scheme:
the utility model provides a multichannel pipe, includes pointed end, bag, lumen, connector, and lumen front end and pointed end intercommunication, pointed end surface are provided with the hole, and the bag radially sets up in the lumen and is close to pointed end department, and lumen rear end and connector intercommunication are provided with two inner tube cavities at least, and the connector is provided with two passageways at least.
The inner tube cavities are sequentially sleeved to form a multi-cavity tubular structure.
The inner lumens merge to form a multi-lumen tubular structure.
The inner tube cavity comprises a third tube cavity d, a second tube cavity b and a first tube cavity a, the second tube cavity b and the first tube cavity a are combined to form a double-cavity tubular structure, and the third tube cavity d is sleeved on the periphery of the second tube cavity b and the periphery of the first tube cavity a to form a three-cavity tubular structure.
Different tube cavities are selected according to the requirements, and the effect is that the speed, the flow and the efficiency of conveying the drug reagent into the cavity channel are different so as to achieve different treatment effects.
The connector is provided with two channels, the inner tube cavity comprises a third tube cavity d, a second tube cavity b and a first tube cavity a, the front end of the first tube cavity a is communicated with the tip hole, and the rear end of the first tube cavity a penetrates through the outer walls of the second tube cavity b and the third tube cavity d to form a guide wire channel; the front end of the second tube cavity B is communicated with the tip hole, and the rear end of the second tube cavity B is communicated with the channel B of the connector to form a perfusion cavity; the front end of the third lumen d is communicated with the bag, and the rear end is communicated with the connector channel C to form a liquid passing cavity.
The connector is provided with three channels, the inner cavity comprises a third cavity d, a second cavity B and a first cavity a, the front end of the first cavity a is communicated with the tip hole, and the rear end of the first cavity a is communicated with the channel B of the connector to form a guide wire channel; the front end of the second tube cavity b is communicated with the tip hole, and the rear end of the second tube cavity b is communicated with the channel A of the connector to form a perfusion cavity; the front end of the third lumen d is communicated with the bag, and the rear end is communicated with the connector channel C to form a liquid passing cavity.
The guide wire channel is used for guiding the guide wire to quickly pass through complex lesions, so as to achieve the effect of accurate positioning.
And a perfusion chamber for delivering the pharmaceutical agent.
The liquid passing cavity is used for conveying the expanding liquid of the bag.
The pointed end adopts the toper structure, is provided with a plurality of holes, improves the efficiency that liquid flowed out.
The rear end of the tube cavity is communicated with the connector channel C through a transition tube which is of a reducing tube cavity structure and is sleeved on the periphery of the tube cavity.
Developing rings are arranged at the positions, close to the two ends of the bag, of the inner tube cavity of the bag.
The surfaces of the balloon and lumen are provided with a coating.
Compared with the prior art, the method has the advantages that: the catheter adopts a multichannel structure, so that the medicine can be conveyed into the cavity channel through the balloon catheter under the protection of the guide wire, and a large number of targeted conveying of various medicines through the balloon catheter in different modes can be realized, and the risk of blocking body fluid circulation or lumen embolism is reduced; the medicine can be used for effectively treating the intracavity stenosis through the medicine reagent infusion, simultaneously the filling of the bag can temporarily block the liquid circulation in the cavity, so that the medicine can be fully absorbed at the lesion part, and the medicine has the characteristics of controllable medicine quantity, quick response, simple operation and the like, and can be used for treating the lesions of the human body cavity, including but not limited to esophagus, blood vessel, trachea, biliary tract, urethra and the like.
Drawings
FIG. 1 shows a structure of a multichannel catheter according to a first embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a catheter multi-channel according to an embodiment of the present invention;
FIG. 3 is a schematic view showing a hole structure at the front end of a catheter according to an embodiment of the invention;
FIG. 4 shows a structure of a multichannel catheter according to a second embodiment of the invention;
FIG. 5 is a schematic cross-sectional view of a two-conduit multi-channel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram showing the hole structure at the front end of a second conduit according to the embodiment of the invention;
FIG. 7 shows the structure of a multichannel catheter according to a third embodiment of the invention;
FIG. 8 shows a schematic cross-sectional view of a three-conduit multi-channel in accordance with an embodiment of the present invention;
FIG. 9 is a schematic diagram showing the hole structure of the front end of a three-duct according to the embodiment of the invention;
FIG. 10 shows the structure of a multichannel catheter according to a fourth embodiment of the invention;
FIG. 11 shows a schematic cross-sectional view of a four-conduit multi-channel in accordance with an embodiment of the invention;
FIG. 12 is a schematic view showing the hole structure of the front end of a fourth conduit according to the embodiment of the present invention;
FIG. 13 shows the structure of a multichannel catheter according to a fifth embodiment of the invention;
FIG. 14 shows a schematic cross-sectional view of a five-duct multichannel in accordance with an embodiment of the invention;
FIG. 15 shows a schematic cross-sectional view of another design of five-conduit multi-channel in accordance with an embodiment of the invention;
FIG. 16 is a schematic view showing the hole structure of the front end of the fifth conduit according to the embodiment of the present invention;
fig. 1 and 4 are schematic structural views of the connector 9 of the present invention in a dual-channel structure;
fig. 7, 10 and 13 are schematic structural views of the three-way structure of the connector 9 according to the present invention;
FIGS. 2, 5, 8, 10, 14, 15 are cross-sectional views of multiple passages, a-guidewire passage, b-infusion lumen, d-infusion lumen;
FIGS. 3, 6, 9, 12 and 16 are schematic illustrations of the structure of the pouring holes;
in the figure: 1. tip, 2, hole, 3, developing ring, 4, bag, 5, first lumen a,6, second lumen b,7, third lumen d,8, transition pipe, 9, connector.
Detailed Description
The details of the invention are further elucidated below in connection with the accompanying drawings and examples:
for a clearer description of embodiments of the invention or of the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the invention, showing not only the embodiments of the guide wire channel between the tip and the distal shaft, but also the embodiments of the guide wire channel between the tip and the connector. Other figures may be derived from these figures without inventive effort for a person of ordinary skill in the art.
Example 1
As shown in fig. 1-3, in this embodiment, when the connector 9 has a dual-channel structure, the structural design is as follows: firstly, fixing a developing ring 3 on a first tube cavity a5, wherein the front end of the first tube cavity a5 is connected with a tip 1; the front end of the second tube cavity b6 is provided with a perfusion hole which is communicated with the hole 2 on the outer surface of the tip 1; the front end of the bag 4 is connected with a second cavity tube b6 close to the tip 1, and the rear end of the bag 4 is connected with a first cavity tube a 5; the first pipe cavity a5 is welded on the pipe body through the RX port twice to form a channel for the guide wire to pass through; the second lumen B6 is communicated with the channel B of the connector 9; the third lumen d7 is communicated with the channel C of the connector 9; the transition pipe 8 is arranged at the periphery between the third lumen d7 and the connecting head 9. The catheter forming a guide wire channel on the catheter body is called a guide wire quick exchange catheter, has good control and convenient use, is beneficial to passing through a tortuous pipeline, and is suitable for a cavity channel with smaller diameter.
The specific implementation mode is as follows: allowing the matched guide wire to pass through the lesion under the support of the micro-catheter, inserting the guide wire into the catheter tip 1, pushing the guide wire into the lesion cavity by the first lumen a5, and penetrating the guide wire out of a guide wire channel formed by the outer walls of the second lumen b6 and the third lumen d7 at the rear end of the first lumen a5 due to the structural design; the catheter continues to advance until approximately 1mm proximal to the lesion; then rapidly pressurizing through a channel C of the connector 9, conveying expanding liquid into the bag 4 to enable the bag 4 to be filled, and then pouring medicine through a channel B of the connector 9 for less than 1min; delivering the medicine into the tip 1 through the second lumen b6, and then acting the medicine on the lesion through the hole 2 on the surface of the tip 1; finally, drug infusion is stopped, the balloon 4 is depressurized and the catheter is withdrawn, the catheter and the guide wire are guided to withdraw successively, and infusion treatment is completed. If the lesion is complex, a 1.25mm single-marked small-diameter balloon can be selected before passing through the catheter, and the balloon can be gradually expanded towards the far end of the lesion, so that the contact area between the drug and the lumen is larger when the drug is infused, and the effect is better.
Example 2
As shown in fig. 4-6, in this embodiment, when the connector 9 has a dual-channel structure, the structural design is as follows: in this embodiment, the first lumen a5 and the second lumen b6 are combined into a dual-lumen tube, the cross section is shown in fig. 5, the front end part of the outer lumen of the dual-lumen tube is firstly provided with a perfusion hole, then the developing ring is fixed on the dual-lumen tube, the front end of the dual-lumen tube is connected with the tip 1, and the tip 1 is designed as a single-lumen tube; the front end of the bag 4 is connected with a double-cavity tube near the tip 1, and the rear end is communicated with a third cavity d 7; the first pipe cavity a is welded at the RX port twice to form a channel for a guide wire to pass through; the second pipe cavity B6 is communicated with the channel B of the connector; the third lumen d7 is connected with the channel C; the transition pipe 8 is arranged at the periphery between the third lumen d7 and the connecting head 9. The catheter forming a guide wire channel on the catheter body is called a guide wire quick exchange catheter, has good control and convenient use, is beneficial to passing through a tortuous pipeline, and is suitable for a cavity channel with smaller diameter.
The specific implementation mode is as follows: allowing the matched guide wire to pass through the lesion under the support of the micro-catheter, inserting the guide wire into the tip 1 of the catheter, pushing the guide wire into the lesion cavity by the first lumen a5, and allowing the guide wire to pass out of a guide wire channel formed by the outer walls of the second lumen b6 and the third lumen d7 at the rear end of the first lumen a5 due to structural design and continuing pushing the catheter until the guide wire is close to the lesion by about 3mm; then rapidly pressing through a channel C opening of the connector 9, and conveying expanding liquid into the bag 4 to enable the bag 4 to be filled, and then pouring medicine through a channel B of the connector 9 for less than 1min; delivering the medicine into the tip 1 through the second lumen b6, and then acting the medicine on the lesion through the hole 2 on the surface of the tip 1; finally, drug infusion is stopped, the balloon 4 is depressurized and the catheter is withdrawn, the catheter and the guide wire are guided to withdraw successively, and infusion treatment is completed. If the lesion is complex, a 1.3mm single-marked small-diameter balloon can be selected before passing through the catheter, and the balloon can be gradually expanded towards the far end of the lesion, so that the contact area between the drug and the lumen is larger when the drug is infused, and the effect is better.
Example 3
As shown in fig. 7-9, in this embodiment, when the connector 9 has a three-way structure, the specific structural design is as follows: firstly, fixing a developing ring on a first tube cavity a5, wherein the front end of the first tube cavity a5 is connected with a tip 1; the front end of the second lumen b is provided with a perfusion hole which is communicated with the hole 2 on the outer surface of the tip 1; the front end of the bag 4 is connected with a second cavity tube b6 close to the tip 1, and the rear end of the bag 4 is connected and communicated with a third cavity d 7; the first lumen a5 is communicated with the channel B, the second lumen B6 is communicated with the channel A, and the third lumen d7 is communicated with the channel C; the transition pipe 8 is arranged at the periphery between the third lumen d7 and the connecting head 9. The catheter for the passage of the guide wire through the separate passage of the connector is generally called a guide wire integral exchange catheter, has good support property on the catheter body and is suitable for a cavity channel with a larger diameter.
The specific implementation mode is as follows: allowing the matched guide wire to pass through the lesion under the support of the micro-catheter, inserting the guide wire into the catheter tip 1, pushing the guide wire into the lesion cavity by the first lumen a, and continuing pushing the catheter until the guide wire approaches the lesion by about 5mm because of the structural design that the guide wire can penetrate out of the port B of the channel B of the connector 9; then rapidly pressing through a channel C opening of the connector 9, and conveying expanding liquid into the bag 4 to enable the bag 4 to be filled, and then pouring medicine along a channel A of the connector 9 for less than 1min; delivering the medicine into the tip 1 through the second lumen b6, and then acting the medicine on the lesion through the hole 2 on the surface of the tip 1; finally, drug infusion is stopped, the balloon 4 is depressurized and the catheter is withdrawn, the catheter and the guide wire are guided to withdraw successively, and infusion treatment is completed. If the lesion is complex, a 1.4mm single-marked small-diameter balloon can be selected before passing through the catheter, and the balloon can be gradually expanded towards the far end of the lesion, so that the contact area between the drug and the lumen is larger when the drug is infused, and the effect is better.
Example 4
As shown in fig. 10-12, in this embodiment, when the connector 9 has a three-way structure, the first lumen a and the second lumen b in this embodiment are combined into a dual-lumen tube, the cross section is shown in fig. 11, and the specific structural design is as follows: firstly, arranging a perfusion hole at the front end of an outer cavity of a double-cavity tube, and then fixing a developing ring 3 on the double-cavity tube, wherein the front end of the double-cavity tube is connected with a tip 1; the front end of the bag 4 is connected with a double-cavity tube close to the tip 1, and the rear end of the bag 4 is connected with a third cavity d 7; the first lumen a5 is communicated with the channel B, the second lumen B is communicated with the channel A, and the third lumen d7 is communicated with the channel C; the transition pipe 8 is arranged at the periphery between the third lumen d7 and the connecting head 9. The catheter for the passage of the guide wire through the separate passage of the connector is generally called a guide wire integral exchange catheter, has good support property on the catheter body and is suitable for a cavity channel with a larger diameter.
The specific implementation mode is as follows: allowing the matched guide wire to pass through the lesion under the support of the micro-catheter, inserting the tail end of the guide wire into the tip 1 of the catheter, pushing the guide wire into the lesion cavity by the first lumen a5, and allowing the guide wire to pass out of the port B of the connector 9 due to the structural design, and continuing pushing the catheter until the guide wire approaches the lesion by about 7mm; then rapidly pressing along the port C of the connector channel, conveying expanding liquid into the bag 4 to enable the bag 4 to be filled, and then pouring medicine along the channel A of the connector 9 for less than 1min; delivering the medicine into the tip 1 through the second lumen b6, and then acting the medicine on the lesion through the hole 2 on the surface of the tip 1; and finally, stopping drug infusion, removing the pressure from the capsule body, withdrawing the catheter, guiding the catheter and the guide wire to withdraw successively, and completing infusion treatment. If the lesion is complex, a 1.5mm single-marked small-diameter balloon can be selected before passing through the catheter, and the balloon can be gradually expanded towards the far end of the lesion, so that the contact area between the drug and the lumen is larger when the drug is infused, and the effect is better.
Example 5
As shown in fig. 13-16, in this embodiment, when the connector 9 has a three-way structure, the third lumen, the second lumen and the first lumen in this embodiment are combined into a three-lumen tube, and the schematic cross-sectional view is shown in fig. 14/15, and the specific structural design is as follows: firstly, peeling the front end part of the third lumen d7, wherein the peeling length is about 5-10 mm+the length of the bag 4, the data need to be determined according to the length range of the bag 4, and the length of the bag 4 is preferably 8-40mm; the front end of the second lumen b6 is provided with a perfusion hole, and the front end of the first lumen a5 is connected with the tip 1; fixing the developing ring on a first lumen a5 and a second lumen b6 of two lumens of the three-lumen tube; the front end of the bag 4 is connected with a first lumen a5 and a second lumen b6 of the two lumens close to the tip 1, and the rear end of the bag 4 is communicated with a third lumen d 7; the three-cavity tube is subjected to pretreatment when being connected with the connector 9, and a third cavity d7 and a second cavity b6 of the three-cavity tube are sequentially stripped, wherein the stripping length is 1/6 to 1/2 of the length of the long shaft of the connector 9; the first lumen a5 is communicated with the channel B, the second lumen B6 is communicated with the channel A, and the third lumen d7 is communicated with the channel C; the transition pipe 8 is arranged at the periphery between the third lumen d and the connecting head 9. The catheter for the passage of the guide wire through the separate passage of the connector is generally called a guide wire integral exchange catheter, has good support property on the catheter body and is suitable for a cavity channel with a larger diameter.
The specific implementation mode is as follows: allowing the matched guide wire to pass through the lesion under the support of the micro-catheter, inserting the tail end of the guide wire into the tip 1 of the catheter, pushing the guide wire into the lesion cavity by the first lumen a5, and allowing the guide wire to pass out of the port B of the connector 9 due to the structural design, and continuing pushing the catheter until the guide wire approaches the lesion by about 10mm; then rapidly pressing along the port C of the connector channel, conveying expanding liquid into the bag 4 to enable the bag 4 to be filled, and then pouring medicine along the channel A of the connector 9 for less than 1min; delivering the medicine into the tip 1 through the second lumen b6, and then acting the medicine on the lesion through the hole 2 on the surface of the tip 1; finally, drug infusion is stopped, the balloon 4 is depressurized and the catheter is withdrawn, the catheter and the guide wire are guided to withdraw successively, and infusion treatment is completed. If the lesion is complex, a 1.5mm single-marked small-diameter balloon can be selected before passing through the catheter, and the balloon can be gradually expanded towards the far end of the lesion, so that the contact area between the drug and the lumen is larger when the drug is infused, and the effect is better.
The above description is illustrative of the preferred embodiment of the invention and is not to be construed as limiting, but is intended to cover all modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The multichannel catheter comprises a tip (1), a balloon (4), a lumen and a connector (9), and is characterized in that the front end of the lumen is communicated with the tip (1), a hole (2) is formed in the outer surface of the tip (1), the balloon (4) is radially arranged at the position, close to the tip (1), of the lumen, the rear end of the lumen is communicated with the connector (9), at least two inner lumens are arranged in the lumen, and at least two channels are formed in the connector (9); the inner tube cavities are sequentially sleeved to form a multi-cavity tubular structure; the inner cavities are combined to form a multi-cavity tubular structure; the inner tube cavity comprises a third tube cavity d (7), a second tube cavity b (6) and a first tube cavity a (5), the second tube cavity b (6) and the first tube cavity a (5) are combined to form a double-cavity tubular structure, and the third tube cavity d (7) is sleeved on the periphery of the second tube cavity b (6) and the periphery of the first tube cavity a (5) to form a three-cavity tubular structure; the connector (9) is provided with two channels, the inner tube cavity comprises a third tube cavity d (7), a second tube cavity b (6) and a first tube cavity a (5), the front end of the first tube cavity a (5) is communicated with the hole of the tip (1), and the rear end of the first tube cavity a penetrates through the outer walls of the second tube cavity b (6) and the third tube cavity d (7) to form a guide wire channel; the front end of the second tube cavity B (6) is communicated with the hole of the tip (1), and the rear end is communicated with the channel B of the connector (9) to form a perfusion cavity; the front end of the third tube cavity d (7) is communicated with the bag (4), and the rear end is communicated with the channel C of the connector (9) to form a liquid passing cavity; the rear end of the tube cavity is communicated with the channel C of the connector (9) through a transition tube (8), the transition tube (8) is of a reducing tube cavity structure, and the transition tube is sleeved on the periphery of the tube cavity.
2. A multichannel catheter according to claim 1, characterized in that the tip (1) adopts a conical configuration.
3. The multi-channel catheter according to claim 1, wherein the connector (9) is provided with three channels, the inner lumen comprises a third lumen d (7), a second lumen B (6) and a first lumen a (5), the front end of the first lumen a (5) is communicated with the hole of the tip (1), and the rear end is communicated with the channel B of the connector (9) to form a guide wire channel; the front end of the second tube cavity b (6) is communicated with the hole of the tip (1), and the rear end is communicated with the channel A of the connector (9) to form a perfusion cavity; the front end of the third tube cavity d (7) is communicated with the bag (4), and the rear end is communicated with the channel C of the connector (9) to form a liquid passing cavity.
4. Multichannel catheter according to claim 1, characterized in that the lumen inside the balloon (4) is provided with visualization rings (3) near both ends of the balloon (4).
5. Multichannel catheter according to claim 1, characterized in that the surface of the balloon (4) and lumen is provided with a coating.
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| CN202011010211.5A CN112870529B (en) | 2021-01-14 | 2021-01-14 | Multi-channel catheter |
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| CN112870529B true CN112870529B (en) | 2024-04-05 |
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| US20080154186A1 (en) * | 2006-11-07 | 2008-06-26 | Angiodynamics, Inc. | Multiple lumen catheter with proximal port |
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| CN201244281Y (en) * | 2008-08-27 | 2009-05-27 | 兖矿集团有限公司 | Three-chamber double-balloon catheter |
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| CN112870529A (en) | 2021-06-01 |
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