CN108578879B - Special catheter for children's reducing saccule dilating vascular stent - Google Patents
Special catheter for children's reducing saccule dilating vascular stent Download PDFInfo
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- CN108578879B CN108578879B CN201810477321.9A CN201810477321A CN108578879B CN 108578879 B CN108578879 B CN 108578879B CN 201810477321 A CN201810477321 A CN 201810477321A CN 108578879 B CN108578879 B CN 108578879B
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- 230000002792 vascular Effects 0.000 title claims description 18
- 210000005077 saccule Anatomy 0.000 title claims description 8
- 230000000916 dilatatory effect Effects 0.000 title description 4
- 230000010339 dilation Effects 0.000 claims abstract description 20
- 230000007704 transition Effects 0.000 claims abstract description 11
- 210000004204 blood vessel Anatomy 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 7
- 125000003277 amino group Chemical group 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002988 biodegradable polymer Polymers 0.000 claims description 2
- 239000004621 biodegradable polymer Substances 0.000 claims description 2
- 125000002843 carboxylic acid group Chemical group 0.000 claims description 2
- 125000001033 ether group Chemical group 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 2
- 230000003902 lesion Effects 0.000 abstract description 4
- 210000003240 portal vein Anatomy 0.000 description 12
- 210000004185 liver Anatomy 0.000 description 10
- 238000002054 transplantation Methods 0.000 description 9
- 239000004952 Polyamide Substances 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 5
- 210000003462 vein Anatomy 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 206010051733 Portal vein stenosis Diseases 0.000 description 3
- 206010048671 Venous stenosis Diseases 0.000 description 2
- 230000003872 anastomosis Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036285 pathological change Effects 0.000 description 2
- 231100000915 pathological change Toxicity 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 208000037803 restenosis Diseases 0.000 description 2
- 206010057573 Chronic hepatic failure Diseases 0.000 description 1
- 208000010334 End Stage Liver Disease Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 201000009454 Portal vein thrombosis Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 208000024248 Vascular System injury Diseases 0.000 description 1
- 208000012339 Vascular injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 238000002399 angioplasty Methods 0.000 description 1
- 208000011444 chronic liver failure Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 206010020718 hyperplasia Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000007998 vessel formation 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/104—Balloon catheters used for angioplasty
-
- 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
- A61M31/002—Devices for releasing a drug at a continuous and controlled rate for a prolonged period of time
-
- 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
- A61M25/1011—Multiple balloon catheters
- A61M2025/1013—Multiple balloon catheters with concentrically mounted balloons, e.g. being independently inflatable
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Anesthesiology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Child & Adolescent Psychology (AREA)
- Pulmonology (AREA)
- Biophysics (AREA)
- Chemical & Material Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Medicinal Chemistry (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a child variable-diameter balloon dilation catheter, and belongs to the field of medical instruments. A children reducing balloon dilation catheter comprises an outer tube, a balloon, an inner tube and a connecting piece, wherein the balloon is a segmented tubular cavity and is provided with a distal end portion, a middle end portion and a proximal end portion, the cross sections of the distal end portion, the middle end portion and the proximal end portion are all round, the proximal end portion can be expanded to an expansion diameter larger than that of the distal end portion, the middle end portion and the proximal end portion of the balloon are all provided with conical transition structures. The invention has the advantages that: the problem that the nonstandard balloon expandable stent cannot be released at present can be solved, so that the child variable-diameter balloon expandable stent can be released more accurately, and the treatment can be carried out on lesions with special anatomical forms.
Description
Technical Field
The invention relates to a children reducing saccule dilating catheter, which is an interventional operation device special for children vein blood vessel formation and belongs to the field of medical appliances.
Background
Liver transplantation in children is the first treatment means for solving the problem of the end-stage liver disease in children. Prognosis of pediatric liver transplantation is affected by a number of factors, the most important of which is the prevention and treatment of complications. Vein stenosis is a common vascular complication after liver transplantation operation of children, and if the treatment is not effective, the mortality rate can reach 24%. The incidence rate of vascular complications of children after liver transplantation is obviously higher than that of adults, and a large number of children with venous stenosis after liver transplantation are detected clinically. However, there is no effective treatment for post-implantation venous stenosis.
The vessel stent forming operation widely applied clinically at present adopts a tubular stent with unchanged diameter. The technical success rate of treating portal vein stenosis after a child liver transplantation operation by using an angioplasty is 66.7%, and the clinical treatment success rate is 73.0%, but the long-term patency rate of five years is unknown. Anatomical and clinical differences in the diameters of the portal veins of the donor and recipient of liver grafts have been shown to be important factors in the occurrence of portal vein stenosis after pediatric liver transplantation and in affecting the success rate of clinical treatment for stenting. Because the diameter of the receptor and the diameter of the donor cannot be simultaneously considered by the cylindrical non-reducing stent, the diameter of the blood vessel of the child suffering from low age is widened along with growth and development, the implantation of the cylindrical non-reducing stent can cause poor adhesion at the proximal end and excessive expansion at the distal end, the vascular injury and intimal hyperplasia can be caused, and the occurrence rate of restenosis in the stent and even portal vein thrombosis is increased. Therefore, the long-term patency of the portal vein of the infant cannot be ensured after the cylindrical non-reducing stent is placed in the blood vessel of the infant, and the success rate of postoperative clinical treatment is affected.
The applicant has invented a children's reducing saccule dilating vascular stent, chinese patent application number is 201711470561.8. The bracket for portal vein stenosis after the liver transplantation of children comprises a bracket main body, a plurality of connecting pieces and a plurality of connecting pieces, wherein the plurality of annular supporting pieces are distributed along the axial direction, and the two adjacent annular supporting pieces are connected through the connecting pieces; the bracket main body is divided into three parts, namely a proximal end part, a middle end part and a distal end part, wherein the pipe diameter of the middle end part is minimum, and the pipe diameter of the proximal end part is maximum; the middle end part is connected with the proximal end parts and the distal end parts at the two sides of the middle end part respectively in a natural transition way by inclined shoulders. The lack of balloon dilation catheter in the prior art that matches the structure of the child's variable diameter balloon dilation vascular stent results in the child's variable diameter balloon dilation vascular stent not being applicable.
Disclosure of Invention
In view of this, this application embodiment provides a children's reducing sacculus inflation pipe, sets up the sacculus that has a plurality of reducing regions at sacculus position to realize with children liver transplantation postoperative portal vein position physiological structure's matching, cooperate the support to carry out the pre-dilation and the back expansion of pathological change blood vessel, also can carry out simple sacculus inflation to simple narrow pathological change and treat, cooperate children's reducing sacculus inflation formula vascular support to release.
In order to achieve the above object, the technical solution provided in the embodiments of the present application is as follows:
a child variable diameter balloon dilation catheter comprising: outer tube, sacculus, inner tube and connecting piece, wherein:
the outer tube is a hollow cylindrical tube body, the proximal end of the outer tube is fixed with the connecting piece and is sealed with the connecting piece, and the distal end of the outer tube is sealed and fixed with the proximal end of the saccule;
the inner tube penetrates through the inner cavity of the outer tube, the distal end of the inner tube extends out of the distal end of the outer tube, and the distal end of the inner tube is fixed with the distal end of the balloon in a sealing manner;
the connecting piece is fixed at the proximal end of the outer tube, a first interface and a second interface are arranged on the connecting piece, and the first interface is communicated with a space between the outer surface of the inner tube and the inner standard surface of the balloon and a space between the outer surface of the inner tube and the inner surface of the outer tube; the second interface is communicated with the proximal opening of the inner tube;
the balloon is a segmented tubular cavity having a distal portion, a middle portion, and a proximal portion, all circular in cross-section, wherein the proximal portion is expandable to an expanded diameter greater than the distal portion, the distal portion is expandable to an expanded diameter greater than the middle portion, and the distal portion, the middle portion, and the proximal portion of the balloon each have a tapered transition structure.
The cross sections of the balloon after the expansion of the distal end part, the middle end part and the proximal end part are all round, the diameter of the round cross section of the distal end part is 6mm-12mm, the balloon is suitable for the portal vein of the young children, the diameter of the round cross section of the middle end part is 5mm-10mm, the diameter of the anastomosis of the portal vein is suitable for the diameter of the anastomosis of the portal vein, the diameter of the round cross section of the proximal end part is 10mm-16mm, the balloon is suitable for the adult vein, and the length of the balloon is 10mm-70mm. The whole bracket is in a reducing cylinder shape, the diameter of the far end part is smaller than that of the near end part, the diameter difference between the diameter of the far end part and the diameter of the near end part is 2-6 mm, the diameter of the middle end part is the minimum diameter, and the diameter difference between the middle end part and the far end part and the near end part is 4-6 mm.
The balloon is preferably 20mm-40mm in length, wherein the distal portion is 7mm-10mm in length, the middle portion is 6mm-8mm in length, the proximal portion is 10mm-15mm in length, and the tapered transition structure is 2mm-4mm in length. The length of the tapered transition structure of each section may be equal, with the included angle of the taper being a conventional degree.
Preferably, the balloon dilation catheter further comprises: at least one developing mark is embedded or sleeved on the inner tube, and the position of the developing mark corresponds to the position of the balloon. The developed indicia is made of platinum opaque to X-rays or a material having development characteristics.
Preferably, the balloon dilation catheter further comprises: the stress diffusion tube is fixed between the outer tube and the connecting piece or wrapped at the joint of the outer tube and the connecting piece, and the stress diffusion tube has the effect of increasing the strength between the proximal end of the outer tube and the connecting piece.
The material of the saccule is nylon polymer, biodegradable polymer, natural fiber material or mixture thereof.
The outer surface of the balloon is coated with a hydrophilic coating, and the hydrophilic coating is provided with one or more of carboxylic acid groups, sulfonic acid groups, sulfuric acid, amino groups, quaternary amino groups and ether groups.
The balloon of the invention adopts a variable diameter design, and the working section of the balloon is provided with 3 sections of balloon pipes with different diameters, and is manufactured by adopting integral molding. The balloon has a unitary construction with a minimum diameter at the intermediate portion and a greater diameter at the proximal portion than at the distal portion, and a greater diameter at the distal portion than at the intermediate portion, i.e., the proximal portion has a maximum diameter. By adopting the structural design, the stent can be completely matched with the shape and the structure of a children variable-diameter balloon expandable vascular stent (Chinese patent application number 201711470561.8), and the stent is fixed outside the balloon and released at the corresponding part in the body. The balloon adopts a structure with a circular cross section, can adapt to the anatomy structure of a venous system, has better adherence, and can avoid the influence on the expansion operation effect caused by the insufficient expansion of the proximal end of a proximal vein due to the transition of the distal expansion of a lesion vessel at the distal end of a vein during the expansion operation, thereby reducing the possibility of occurrence of thrombus or restenosis after the operation.
The release stage: during interventional operation, the percutaneous portal vein is punctured, the indwelling sheath is inserted into the portal vein, the stent is inserted into the sheath tube along the guide wire to the distal end of the portal vein, the inner core of the sheath tube and the guide wire are withdrawn, the stent is conveyed into the distal end of the sheath tube through the inner core of the delivery sheath tube and the recovery sheath tube, 1/2 of the stent in the front of the stent is positioned in the portal vein of a donor according to a pre-positioning mark, 1/2 of the stent is positioned in the portal vein of a receiver, the middle end of the stent is placed at the anastomotic stoma of the portal vein, and the stent is released at the anastomotic stoma of the vessel by using the balloon dilation catheter.
The invention has the advantages that: the problem that the nonstandard balloon expandable stent cannot be released at present can be solved, so that the child variable-diameter balloon expandable stent can be released more accurately, and the treatment can be carried out on lesions with special anatomical forms.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1A schematic view of embodiment 1 of the present invention
FIG. 2 is a cross-sectional view of the balloon portion
Detailed Description
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments of the present application, which can be obtained by a person of ordinary skill in the art without making any inventive effort, shall fall within the scope of protection of the present application.
As used herein, "distal" refers to the end that is proximal to the patient during delivery, and "proximal" refers to the end that is proximal to the operator during clinical procedures.
Example 1
Fig. 1 is a schematic structural view of one embodiment of a balloon dilation catheter provided herein.
As shown in fig. 1 and 2, the balloon dilation catheter includes: an outer tube 1, an inner tube 2, a balloon 3, a connecting piece 4, a developing mark 5 and a stress diffusion tube 6.
The outer tube 1 is of a hollow structure, the proximal end of the outer tube 1 is fixed with the connecting piece 4 and is sealed with the connecting piece 4, and the distal end of the outer tube 1 is sealed and fixed with one end of the balloon 3. In addition, in order to ensure that the distal end of the outer tube 1 is sufficiently flexible to allow access to the blood vessel and that the proximal end of the outer tube 1 is sufficiently rigid to provide a relatively large pushing force during pushing, in other embodiments of the present application, the outer tube 1 may be of a multi-stage design, i.e. the material of each stage constituting the outer tube 1 gradually increases in hardness from the distal end to the proximal end of the outer tube 1, for example, the material of the stage located at the distal end portion of the outer tube 1 may be selected from a relatively soft polyamide polymer material, a modified polyamide polymer material or a polyamide polymer composite material, and the material of each stage located at the proximal end portion of the outer tube 1 may be selected from a relatively hard nylon or a mixture of nylons.
The balloon 3 is a segmented tubular cavity having a distal portion 31, a middle portion 32 and a proximal portion 33, which are all circular in cross section after inflation, wherein the proximal portion 33 is expandable to an expanded diameter larger than the distal portion 31, the distal portion 31 is expandable to an expanded diameter larger than the middle portion 32, and the distal portion 31, middle portion 32 and proximal portion 33 of the balloon 3 each have a tapered transition structure 34. The diameter of the circular cross section of the distal portion 31 is 12mm and the length is 10mm; the diameter of the circular cross section of the middle end portion 32 is 10mm and the length is 8mm; the diameter of the circular cross section of the proximal portion 33 is 16mm and the length is 15mm. The tapered transition structures 34 of the various sections are 2mm-4mm in length.
The balloon 3 is secured to the distal end of the outer tube 1 by thermal welding, laser welding or other means of sealing and forms a seal at the weld site. The material of the balloon 3 can be medical polymer material, such as polyamide polymer material, modified polyamide polymer material or polymer composite material. In addition, in order to smoothly dilate a blood vessel, the burst pressure that the balloon 3 can withstand is selected to be in the range of 6-30 atm.
The inner tube 2 penetrates through the inner cavity of the outer tube 1, the distal end of the inner tube 2 extends out of the distal end opening of the outer tube 1, the distal end of the inner tube 2 is fixed with the distal end of the balloon 3 in a sealing way, the inner tube 2 and the balloon 3 can be fixed in a thermal welding or laser welding way, and the welding part is sealed.
As shown in fig. 1, the connector 4 is fixed at the proximal end of the outer tube 1, and two interfaces are provided on the connector 4: a first interface 41 and a second interface 42, wherein: the first interface 41 is communicated with the space between the outer surface of the inner tube 2 and the inner surface of the balloon 3 and the space between the outer surface of the inner tube 2 and the inner surface of the outer tube 1, and after the balloon 3 is conveyed in place in the operation process, liquid or gas can be injected into the first interface 41 to expand the balloon 3 under the action of pressure so as to expand the narrow blood vessel at the lesion; the second port 42 is in communication with the proximal opening of the inner tube 2, and during surgery, the front end of the guide wire can be inserted into the blood vessel, then the tail end of the guide wire can be inserted from the distal opening of the inner tube 2, and the guide wire can be inserted out of the second port 42, so that the balloon dilation catheter can be conveyed into place under the guidance of the guide wire.
The balloon dilation catheter further comprises: at least one developing mark 5, the developing mark 5 is embedded or sleeved on the inner tube 2, the position of the developing mark corresponds to the position of the balloon 3, and the developing mark is used for displaying the position of the balloon 3 during pushing. In the embodiment of the present application, the number of the developing marks 5 is 2, and two developing marks are respectively disposed on the opposite inner tube 2 at the two ends of the balloon 3.
The balloon dilation catheter further comprises: and a stress diffusion tube 6, wherein the stress diffusion tube 6 is fixed between the outer tube 1 and the connecting piece 4 or wrapped at the joint of the outer tube 1 and the connecting piece 4, and the stress diffusion tube 6 has the function of increasing the strength between the proximal end of the outer tube 1 and the connecting piece 4.
Example 2.
The difference from example 1 is that the balloon 3 is a segmented tubular cavity with a distal end portion 31, a middle end portion 32 and a proximal end portion 33, all circular in cross section after inflation. The diameter of the circular cross section of the distal portion 31 is 6mm and the length is 7mm; the diameter of the circular cross section of the middle end portion 32 is 5mm and the length is 6mm; the diameter of the circular cross section of the proximal portion 33 is 10mm and the length is 10mm. The tapered transition structure 34 of each section is 2mm in length.
While the basic principles and main features of the present invention and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a special pipe of children's reducing sacculus expansion formula blood vessel sacculus, its characterized in that includes outer tube, sacculus, inner tube and connecting piece, wherein:
the outer tube is a hollow cylindrical tube body, the proximal end of the outer tube is fixed with the connecting piece and is sealed with the connecting piece, and the distal end of the outer tube is sealed and fixed with the proximal end of the saccule;
the inner tube penetrates through the inner cavity of the outer tube, the distal end of the inner tube extends out of the distal end of the outer tube, and the distal end of the inner tube is fixed with the distal end of the balloon in a sealing manner;
the connecting piece is fixed at the proximal end of the outer tube, a first interface and a second interface are arranged on the connecting piece, and the first interface is communicated with a space between the outer surface of the inner tube and the inner standard surface of the balloon and a space between the outer surface of the inner tube and the inner surface of the outer tube; the second interface is communicated with the proximal opening of the inner tube;
the balloon is a segmented tubular cavity and has a distal end portion, a middle end portion and a proximal end portion which are all circular in cross section, wherein the proximal end portion is expandable to an expanded diameter larger than the distal end portion, the distal end portion is expandable to an expanded diameter larger than the middle end portion, and the distal end portion, the middle end portion and the proximal end portion of the balloon all have tapered transition structures; the balloon adopts a variable diameter design, the working section of the balloon is provided with 3 sections of balloon pipes with different diameters, the balloon is manufactured by adopting integral molding, the whole structure of the balloon is that the diameter of a middle end part is minimum, the diameter of a proximal end part is larger than that of a distal end part, and the diameter of the distal end part is larger than that of the middle end part, namely the proximal end part has the largest diameter; after the balloon is delivered in place, a liquid or gas may be injected into the first port to expand the balloon under pressure.
2. The catheter special for the expanded vascular balloon of the variable-diameter balloon for children according to claim 1, wherein the catheter is characterized in that: the cross sections of the balloon after the distal end part, the middle end part and the proximal end part are inflated are circular, the diameter of the circular cross section of the distal end part is 6mm-12mm, the diameter of the circular cross section of the middle end part is 5mm-10mm, the diameter of the circular cross section of the proximal end part is 10mm-16mm, and the length of the balloon is 10mm-70mm.
3. The catheter special for the expanded vascular balloon of the variable-diameter balloon for children according to claim 2, wherein the catheter is characterized in that: the length of the balloon is 20mm-40mm, the length of the distal end part is 7mm-10mm, the length of the middle end part is 6mm-8mm, the length of the proximal end part is 10mm-15mm, and the length of the conical transition structure is 2mm-4mm.
4. A child variable diameter balloon dilation vascular balloon catheter according to any one of claims 1 to 3 wherein: the balloon dilation catheter is also provided with at least one developing mark, the developing mark is embedded or sleeved on the inner tube, and the position of the developing mark corresponds to the position of the balloon.
5. The catheter special for the children's reducing balloon expandable vascular balloon, according to claim 4, is characterized in that: the developed indicia is made of platinum opaque to X-rays or a material having a development characteristic.
6. The catheter special for the children's reducing balloon expandable vascular balloon, according to claim 4, is characterized in that: the balloon dilation catheter further includes a stress diffuser.
7. The catheter special for the children's reducing balloon expandable vascular balloon, according to claim 6, wherein the catheter is characterized in that: the stress diffusion tube is fixed between the outer tube and the connecting piece or wrapped at the joint of the outer tube and the connecting piece.
8. A child variable diameter balloon dilation vascular balloon catheter according to any one of claims 1 to 3 wherein: the material of the saccule is nylon polymer, biodegradable polymer, natural fiber material or mixture thereof.
9. A child variable diameter balloon dilation vascular balloon catheter according to any one of claims 1 to 3 wherein: the outer surface of the balloon is coated with a hydrophilic coating.
10. The catheter special for the expanded vascular balloon of the variable-diameter balloon for children according to claim 9, wherein the catheter is characterized in that: the hydrophilic coating is provided with one or more of carboxylic acid groups, sulfonic acid groups, sulfuric acid groups, amino groups, quaternary amino groups and ether groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477321.9A CN108578879B (en) | 2018-05-17 | 2018-05-17 | Special catheter for children's reducing saccule dilating vascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477321.9A CN108578879B (en) | 2018-05-17 | 2018-05-17 | Special catheter for children's reducing saccule dilating vascular stent |
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| Publication Number | Publication Date |
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| CN108578879A CN108578879A (en) | 2018-09-28 |
| CN108578879B true CN108578879B (en) | 2024-02-09 |
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| CN201810477321.9A Active CN108578879B (en) | 2018-05-17 | 2018-05-17 | Special catheter for children's reducing saccule dilating vascular stent |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701140B (en) * | 2018-12-29 | 2022-04-22 | 先健科技(深圳)有限公司 | Balloon catheter and puncture system thereof |
| CN111228634B (en) * | 2020-02-21 | 2022-03-29 | 玮铭医疗器械(上海)有限公司 | Adjustable sacculus pipe |
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| CN208741722U (en) * | 2018-05-17 | 2019-04-16 | 首都医科大学附属北京友谊医院 | A kind of children's variable diameter sacculus dilating catheter |
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- 2018-05-17 CN CN201810477321.9A patent/CN108578879B/en active Active
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| CN108578879A (en) | 2018-09-28 |
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