KR101764318B1 - Angiographic catheter - Google Patents

Angiographic catheter Download PDF

Info

Publication number
KR101764318B1
KR101764318B1 KR1020160031378A KR20160031378A KR101764318B1 KR 101764318 B1 KR101764318 B1 KR 101764318B1 KR 1020160031378 A KR1020160031378 A KR 1020160031378A KR 20160031378 A KR20160031378 A KR 20160031378A KR 101764318 B1 KR101764318 B1 KR 101764318B1
Authority
KR
South Korea
Prior art keywords
catheter
intermediate portion
outer diameter
tip
body portion
Prior art date
Application number
KR1020160031378A
Other languages
Korean (ko)
Inventor
한동훈
전준한
Original Assignee
서울대학교병원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 서울대학교병원 filed Critical 서울대학교병원
Priority to KR1020160031378A priority Critical patent/KR101764318B1/en
Application granted granted Critical
Publication of KR101764318B1 publication Critical patent/KR101764318B1/en

Links

Images

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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0152—Tip steering devices with pre-shaped mechanisms, e.g. pre-shaped stylets or pre-shaped outer tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14503—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
    • 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
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/007—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests for contrast media
    • 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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M2025/0161—Tip steering devices wherein the distal tips have two or more deflection regions

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Vascular Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The present invention relates to a catheter for use in angiography. More specifically, according to one aspect of the present invention, the catheter for use in angiography comprises: a body part; an intermediate part leading to the body portion; and a tip part leading to the intermediate portion, wherein the outer diameter of the body part is characterized by a size equal to or larger than the outer diameter of the intermediate part and the outer diameter of the tip part, and an inner tube passing through the inside of the body part, the intermediate part, and the tip part is formed inside the body part, the intermediate part, and the tip part. According to the present invention, the body of the catheter is formed as a coarse tube to ensure durability, supportive force, and rotational force, while the tip part of the catheter is inserted into a target vessel inlet port.

Description

ANGIOGRAPHIC CATHETER < RTI ID = 0.0 >

The present invention relates to a catheter for use in angiography. More particularly, the present invention relates to a catheter including a middle portion leading to the body portion and a tip leading to the middle portion, wherein an outer diameter of the body portion is greater than an outer diameter of the middle portion and the tip portion.

Currently, the catheter used to examine the body consists of a single diameter. Therefore, when performing angiography, if a coronary artery test was performed using a catheter and a spasm occurred, the small diameter catheter was changed to a small diameter catheter, and the blood vessel test was conducted again using a small diameter catheter. However, if the catheter is inspected with a small-diameter catheter, the catheter's bearing capacity, torquability and the like become low, which makes it difficult to track the entrance of the blood vessel or to keep the catheter in the vessel entrance.

Thus, the present inventor has developed a catheter having a diameter tapered.

It is an object of the present invention to solve all the problems described above.

The present invention aims at securing durability, supporting force, and rotational force by using a thick body of the catheter, while making only a tip portion that enters a target blood vessel entrance as a thin tube, and stimulating the entrance of a blood vessel at a small amount to stimulate the examination safely .

Another object of the present invention is to prevent the catheter from being pushed due to the repulsive force generated by the force injected into the blood vessel when the contrast agent is injected into the catheter.

In order to accomplish the above object, a representative structure of the present invention is as follows.

According to one aspect of the present invention, there is provided a catheter for use in angiography, comprising: a body portion; An intermediate portion leading to the body portion; And a tip portion extending from the middle portion. The outer diameter of the body portion has a size equal to or greater than an outer diameter of the middle portion and an outer diameter of the tip portion. The body portion, the middle portion, And an inner tube penetrating through the inside of the intermediate portion and the tip portion is formed.

According to the present invention, the body of the catheter is formed into a coarse tube to ensure durability, supportive force, and rotational force, while the tip portion of the catheter that enters the entrance of the target vessel is made of a thin tube.

In addition, according to the present invention, when the contrast agent is injected into the blood vessel by the catheter, the flap is unfolded due to the repulsive force generated by the force injected by the contrast agent, so that the flap is brought into contact with the vessel wall, thereby preventing the catheter from being pushed.

FIGS. 1A and 1B are views for explaining the examination using a conventional catheter. FIG.
2A-2C illustrate a catheter according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

FIGS. 1A and 1B are views for explaining the examination using a conventional catheter. FIG.

As shown in FIG. 1A, a catheter conventionally used for angiography consists of a tip portion and a body portion having a constant diameter.

Herein, the angiography is a procedure in which the skin is cut to a size of about 3 mm, and a catheter (a thin tube about 2 mm or less) is inserted into a patient's blood vessel 200 and injected with a drug called contrast agent, And a tip portion which is an end portion of the catheter is placed at the entrance of the target vessel 210 in order to inject the contrast agent into the target vessel 210 to be inspected.

A catheter having a diameter of about 5Fr to 6Fr can be used for a catheter having a diameter of about 3Fr to 4Fr when a conventional catheter having a single diameter is used to perform an angiographic examination. The catheter has a relatively large supporting force for supporting the catheter, which is advantageous in that it is relatively easy to control the catheter. However, when the tip of the relatively thick catheter is inserted into the inlet of the target vessel 210 as shown in FIG. 1B, the blood vessel 200 may be stimulated by the tip of the thick catheter to cause a spasm The safety of the test may be a problem.

Normally, when spasm occurs, the test is resumed using a relatively small diameter catheter. However, when using a small diameter catheter, the catheter's bearing capacity and rotational power are weaker than those of a larger diameter catheter. There will be difficulties.

In order to solve such a problem, the diameter of the tip portion of the catheter according to the embodiment of the present invention is relatively small, thereby facilitating the control of the catheter with less irritation at the entrance of the target vessel 210. This will be described in detail with reference to FIG.

2A-2C illustrate a catheter according to an embodiment of the present invention.

2A, a catheter according to an embodiment of the present invention is a thin tube made of a medical material. At least a part of the catheter is made of a flexible material and can be bent. As the catheter is at least partially bent, The first bent portion 101 and the second bent portion 102, which are located at a position far from the tip 110, are present. 1A, the catheter inserted into the blood vessel 200 is bent according to the shape of the blood vessel 200 and is wound around the entrance of the target vessel 210. Here, in order to place the tip of the catheter at the entrance of the target vessel 210 The bent portion may correspond to the second bent portion 102.

2B, a catheter according to an embodiment of the present invention may include a tip portion 110, an intermediate portion 120, and a body portion 130. The catheter may include a body portion 130, The intermediate part 120 and the inner pipe 150 passing through the inside of the tip part 110 may be formed in the inner part 120 and the tip part 110. [ The outer diameter of the body portion 130 is equal to the outer diameter of the intermediate portion 120 and the outer diameter of the tip portion 110 of the body portion 130. In this case, Which is greater than the outer diameter of the blood vessel 110. This makes it possible to safely carry out the examination while receiving strong stimulation at the entrance of the blood vessel 200 and being firmly supported.

Specifically, the outer diameter of the body part 130 may be 4Fr to 5Fr when inserting through the blood vessel of the arm and reaching the blood vessel of the heart, and inserting it through the blood vessel of the leg to reach the blood vessel of the heart, And the outer diameter of the tip portion 110 may be 2Fr to 4Fr. The intermediate portion 120 may be formed to have the same outer diameter as that of the tip portion 110 by reducing the outer diameter in at least a part of the section from the body portion 130 to the tip portion 110. For example, if the outer diameter of the body portion 130 is 5Fr and the outer diameter of the tip portion 110 is 3Fr, the outer diameter of the portion near the body portion 130 in the middle portion 120 may be tapered from 5Fr to 3Fr And the outer diameter of the portion near the tip portion 110 may be composed of a single diameter 3Fr.

More specifically, the intermediate portion 120 may include a first intermediate portion 120a and a second intermediate portion 120b, and may include a first intermediate portion 120a and a second intermediate portion 120b. The first intermediate portion 120a is connected to the tip portion 110 and the other end is connected to the second intermediate portion 120b. The second intermediate portion 120b is configured such that one side is connected to the first intermediate portion 120b, The outer diameter of the first intermediate portion 120a may be the same as the outer diameter of the tip portion 110 and the other end of the second intermediate portion 120a may be connected to the body portion 130. [ 120b may be closer to the diameter of the body portion 130 as the body portion 130 is closer to the body portion.

Referring to FIG. 2B, the second bent portion 102, which is formed at a position near the tip 110, may be assumed to be the B point of the second intermediate portion 120b, A point C which is an interface between the body 120 and the body 130, or a point D which is a point of the body 130. [

Meanwhile, the diameter of the inner tube 150 of the catheter according to an embodiment of the present invention may be formed to be constant, in order to prevent turbulence. If the diameter of the inner tube 150 is tapered along the diameter of the middle portion 120 and the body portion 130, a vortex may occur when the contrast agent is injected through the inner tube 150 of the catheter, This may cause the catheter to be shaken. To prevent this, it is preferable that the diameter of the inner tube 150 of the catheter is made uniform.

A flap portion for supporting the catheter may be formed on the outer surface of the intermediate portion 120 according to an embodiment of the present invention and only one side of the flap portion 140 may be coupled with the outer surface of the intermediate portion 120 .

Specifically, the flap portion 140 may be positioned between the second bent portion 102 and the tip portion 110. For example, the flap portion 140 may be formed by being coupled with the outer surface of the first intermediate portion 120a, When the contrast medium is injected into the catheter, the contrast agent is automatically unfolded by the repulsive force generated by the force of injecting the contrast agent to contact the wall of the blood vessel 200.

Referring to FIG. 2C, when the contrast agent is injected through the inner tube 150 of the catheter and the contrast agent is injected from the inner tube 150 on the side of the tip 110, the reaction force generated in the direction opposite to the direction in which the contrast agent is injected The flap portion 140 will automatically unfold as the catheter is pushed. This minimizes leakage of blood as it flows back to the catheter and increases the resistance and minimizes catheter pumping as the unfolded flap portion 140 is supported on the wall of the blood vessel 200.

Here, the flap portion 140 is formed of a very soft material, and the shape of the flap portion 140 is not limited, but may be coupled to the middle portion 120 of the catheter like a fan.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

100: catheter
200: blood vessel

Claims (8)

In a catheter used for angiography,
A body portion;
An intermediate portion extending from the body portion; And
And a tip portion leading to the intermediate portion,
Wherein an outer diameter of the body portion is greater than an outer diameter of the intermediate portion and an outer diameter of the tip portion,
An inner tube passing through the inside of the body portion, the middle portion, and the tip portion is formed inside the body portion, the middle portion, and the tip portion,
Wherein at least a portion of the catheter is made of a flexible material and is capable of being inflated, the first inflection point occurring at a point remote from the tip as the at least a portion of the catheter is inflated and the second inflection point Lt; / RTI >
Wherein the intermediate portion comprises a first intermediate portion and a second intermediate portion,
Wherein the first intermediate portion and the second intermediate portion are integrally formed,
Wherein the first intermediate portion has one side connected to the tip portion and the other side connected to the second intermediate portion, the second intermediate portion being connected to the first intermediate portion and the other end connected to the body portion,
Wherein the second bent portion is located at one of the second intermediate portion, the body portion, and the interface between the second intermediate portion and the body portion,
A flap portion for supporting the catheter is formed on the outer surface of the middle portion, and only one side of the flap portion is formed to be coupled to the outer surface of the middle portion like a fan blade,
Wherein the flap is attached to the surface of the intermediate portion at a normal time and is automatically unfolded by the repulsive force generated by the force of injecting the contrast agent into the blood vessel wall when the contrast agent is injected into the catheter. Catheter. The method according to claim 1,
The outer diameter of the body portion is 4Fr to 5Fr when inspecting with the arm and between 5Fr and 6Fr when inspecting with a leg,
The outer diameter of the tip portion is 2Fr to 4Fr,
Wherein the middle portion is reduced in outer diameter in at least a part of a section from the body portion to the tip portion to be equal to an outer diameter of the tip portion. The method according to claim 1,
Wherein the diameter of the inner tube is constant. delete delete The method according to claim 1,
Wherein the intermediate portion comprises a first intermediate portion and a second intermediate portion,
Wherein the first intermediate portion and the second intermediate portion are integrally formed,
Wherein the first intermediate portion has one side connected to the tip portion and the other side connected to the second intermediate portion, the second intermediate portion being connected to the first intermediate portion and the other end connected to the body portion,
Wherein the outer diameter of the first intermediate portion is maintained equal to the outer diameter of the tip portion and the outer diameter of the second intermediate portion is closer to the diameter of the body portion as the body is closer to the body portion. delete delete
KR1020160031378A 2016-03-16 2016-03-16 Angiographic catheter KR101764318B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160031378A KR101764318B1 (en) 2016-03-16 2016-03-16 Angiographic catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160031378A KR101764318B1 (en) 2016-03-16 2016-03-16 Angiographic catheter

Publications (1)

Publication Number Publication Date
KR101764318B1 true KR101764318B1 (en) 2017-08-10

Family

ID=59652456

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160031378A KR101764318B1 (en) 2016-03-16 2016-03-16 Angiographic catheter

Country Status (1)

Country Link
KR (1) KR101764318B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210123833A (en) 2020-04-06 2021-10-14 재단법인 아산사회복지재단 Angiographic catheter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000167061A (en) 1998-12-11 2000-06-20 Togo Medikit Kk Catheter introducer
JP2002505165A (en) * 1998-03-04 2002-02-19 ボストン サイエンティフィック リミテッド Method for improving penetration of catheter tip and stent
JP2007521088A (en) 2003-07-02 2007-08-02 クック・インコーポレイテッド Small gauge needle catheter insertion device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002505165A (en) * 1998-03-04 2002-02-19 ボストン サイエンティフィック リミテッド Method for improving penetration of catheter tip and stent
JP2000167061A (en) 1998-12-11 2000-06-20 Togo Medikit Kk Catheter introducer
JP2007521088A (en) 2003-07-02 2007-08-02 クック・インコーポレイテッド Small gauge needle catheter insertion device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210123833A (en) 2020-04-06 2021-10-14 재단법인 아산사회복지재단 Angiographic catheter
WO2021206401A1 (en) * 2020-04-06 2021-10-14 재단법인 아산사회복지재단 Angiographic catheter

Similar Documents

Publication Publication Date Title
JP7073355B2 (en) Assembly to replace the heart valve or coronary angioplasty assembly
US6192280B1 (en) Guidewire placed implantable lead with tip seal
JP5381703B2 (en) Thrombus aspiration catheter
KR20150102064A (en) Sheath assembly for insertion of a cord-shaped element, particularly a catheter, into the body of a patient
CN210750892U (en) Introducer for inserting a medical device into a blood vessel of a patient
US20120157854A1 (en) System and method for gaining percutaneous access to a body lumen
CN104812439A (en) Interventional medical systems, tools, and assemblies
WO2007079375A3 (en) Active fixation cardiac vein medical lead
CN106983928B (en) System for delivering therapeutic agents
JP2012518440A (en) Fixed catheter sheath
JPH0229264A (en) Balloon catheter
JPWO2015146408A1 (en) Catheter assembly and internal catheter
JPH0434416B2 (en)
US10390983B2 (en) Medical-device position adjusting method and medical device system
KR101764318B1 (en) Angiographic catheter
JP6558881B2 (en) Perfusion cannula with integrated sensor technology
US6605075B1 (en) Flushable hub
US20170224283A1 (en) Devices and systems for tissue engagement and methods of using the same
US20210290165A1 (en) Anchoring system for a catheter delivered device
CN113648534A (en) Blood pump device, system for inserting blood pump and working method
CN207575187U (en) A kind of novel delivery sheath for left atrial appendage occlusion art
CN210844895U (en) Ultrasonic development arteriovenous fistula sacculus
JP2019146599A (en) Balloon catheter
CN208678150U (en) Foley's tube
EP3978061A1 (en) Balloon catheter

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant