CN115212449A - Balloon catheter - Google Patents

Balloon catheter Download PDF

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Publication number
CN115212449A
CN115212449A CN202210899991.6A CN202210899991A CN115212449A CN 115212449 A CN115212449 A CN 115212449A CN 202210899991 A CN202210899991 A CN 202210899991A CN 115212449 A CN115212449 A CN 115212449A
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CN
China
Prior art keywords
blood
valve
cavity
pipe body
balloon catheter
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202210899991.6A
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Chinese (zh)
Inventor
于洋
李东海
于文渊
柳弘历
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Yuewei Medical Technology Co ltd
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Beijing Yuewei Medical Technology Co ltd
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Publication date
Application filed by Beijing Yuewei Medical Technology Co ltd filed Critical Beijing Yuewei Medical Technology Co ltd
Priority to CN202210899991.6A priority Critical patent/CN115212449A/en
Publication of CN115212449A publication Critical patent/CN115212449A/en
Pending legal-status Critical Current

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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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
    • A61M60/178—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0074—Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
    • A61M25/0075—Valve means
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/295—Balloon pumps for circulatory assistance
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
    • A61M60/89—Valves
    • A61M60/894—Passive valves, i.e. valves actuated by the blood
    • A61M60/896—Passive valves, i.e. valves actuated by the blood having flexible or resilient parts, e.g. flap valves
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0074—Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
    • A61M25/0075—Valve means
    • A61M2025/0076—Unidirectional valves
    • A61M2025/0078—Unidirectional valves for fluid inflow from the body into the catheter lumen
    • 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
    • A61M2206/00—Characteristics of a physical parameter; associated device therefor
    • A61M2206/10—Flow characteristics

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Mechanical Engineering (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Child & Adolescent Psychology (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention relates to the technical field of medical equipment, and provides a balloon catheter which comprises a first catheter body, a second catheter body, a first valve and a second valve; a first cavity is arranged in the first pipe body, one end of the first pipe body is connected with the middle part of the second pipe body, and the other end of the first pipe body is communicated with the blood storage device; the first tube body is provided with a blood discharge hole which is communicated with the first cavity; the first end of the second pipe body extends into the first cavity, and the second end of the second pipe body is provided with a suction hole; the first valve and the second valve are both arranged in the first cavity; during systole, the first valve opens the first end of the second tube body, and the second valve closes the blood discharge hole; during diastole, the first valve closes the first end of the second tube body, and the second valve opens the blood discharge hole; the device provided by the invention can suck blood from the left ventricle in the systole, simultaneously avoid the blood of the ascending aorta from being sucked out of the body by mistake, discharge the blood into the ascending aorta in the diastole and simultaneously avoid the blood from being discharged into the left ventricle by mistake.

Description

Balloon catheter
Technical Field
The invention relates to the technical field of medical instruments, in particular to a balloon catheter.
Background
With the change of life style of people, the incidence rate of cardiovascular diseases is continuously increased; cardiogenic shock is a critical state caused by various heart diseases such as acute myocardial infarction, acute myocarditis and the like.
The existing cardiogenic shock treatment mode is to use an intervention type left ventricle auxiliary device to lead blood of a left ventricle to the outside of a body so as to reduce heart load, thereby replacing the ventricle to do work, increasing peripheral blood supply and realizing the function of partially or completely replacing ejection of the left ventricle; this way blood is continuously drawn out of the left ventricle and expelled into the periphery during both systole and diastole, resulting in an advective blood flow whose hemodynamic characteristics do not conform to the physiological state, which can cause chronic damage to the organ during use.
Disclosure of Invention
The invention provides a balloon catheter which is used for solving or improving the problem of advection blood flow of which the hemodynamic characteristics do not conform to the physiological state of the existing interventional left ventricle auxiliary device.
The present invention provides a balloon catheter comprising: the first valve comprises a first pipe body, a second pipe body, a first valve and a second valve;
a first cavity is arranged in the first tube body, one end of the first tube body is connected with the middle part of the second tube body, and the other end of the first tube body is used for being communicated with a blood storage device; a blood discharge hole is formed in the first tube body and communicated with the first cavity;
the first end of the second pipe body extends into the first cavity, and the second end of the second pipe body is provided with a suction hole;
the first valve and the second valve are arranged in the first cavity, the first valve is used for controlling the opening and closing state of the first end of the second tube body, and the second valve is used for controlling the opening and closing state of the blood discharge hole;
under the condition that blood flows along the extending direction from the second tube body to the first tube body, the first valve opens the first end of the second tube body, and the second valve closes the blood discharge hole;
under the condition that blood flows along the extending direction of the first tube body to the second tube body, the first valve closes the first end of the second tube body, and the second valve opens the blood discharge hole.
According to a balloon catheter provided in the present invention, the first tube includes: an expansion part and a switching part; the first cavity is formed in the expansion portion, the first end of the expansion portion is connected with the middle of the second pipe body, and the second end of the expansion portion is communicated with the switching portion.
According to the balloon catheter provided by the invention, the diameter of the expansion part is gradually reduced in the extending direction from the middle part of the expansion part to the first end or the second end of the expansion part, and the blood discharge hole is formed close to the first end of the expansion part.
According to the balloon catheter provided by the invention, one end of the first valve is connected with the first end of the second tube body, and the first valve can swing relative to the second tube body under the action of blood so as to open or close the first end of the second tube body; wherein the covering area of the first valve is larger than the area of the orifice of the second pipe body.
According to a balloon catheter provided by the present invention, the balloon catheter further comprises: a framework; the framework is arranged in the first cavity, the framework is sleeved on the second pipe body, a second cavity is defined between the framework and the inner wall surface of the first cavity, and the blood discharge hole is communicated with the second cavity; the framework is provided with a communication port, and the second valve is connected with the framework to control the opening or closing of the communication port.
According to the present invention, there is provided a balloon catheter, the balloon catheter comprising: a first annular portion and a second annular portion; the first annular part is sleeved on the outer wall surface of the second pipe body, the second annular part is sleeved on the outer side of the second pipe body and is connected with the inner wall surface of the first cavity, and the communication port is formed between the first annular part and the second annular part; one end of the second valve is connected with the first annular part; the second valve can swing relative to the second annular part under the action of blood so as to open or close the communication port.
According to the balloon catheter provided by the invention, the skeleton further comprises: a plurality of connecting portions; a plurality of connecting portions arranged along a circumferential direction of the first annular portion, one end of the connecting portion being connected to the first annular portion, and the other end of the connecting portion being connected to the second annular portion, so as to form a plurality of the communication ports between the first annular portion and the second annular portion; the second valve is provided with a plurality of, a plurality of the second valve with a plurality of the intercommunication mouth one-to-one sets up.
According to the balloon catheter provided by the invention, the blood discharge holes are provided in plurality, and the blood discharge holes and the communication ports are arranged in one-to-one correspondence.
According to the balloon catheter provided by the invention, the second tube body comprises a first section and a second section, and the second section is in a circular truncated cone shape; the first section is connected with the second section, and the suction hole is formed in the conical surface of the second section.
According to the balloon catheter provided by the invention, the suction holes are provided in plurality and are uniformly distributed along the circumferential direction of the second section.
According to the balloon catheter provided by the invention, the first valve and the second valve are arranged in the first cavity of the first pipe body, the first valve and the second valve can be adaptively adjusted to corresponding positions under the condition that the blood flowing direction is changed, so that the blood in the left ventricle can be intermittently conveyed to the ascending aorta along with the contraction and the relaxation of the heart, meanwhile, the blood in the ascending aorta is prevented from being sucked out of the body by mistake when the blood is sucked from the left ventricle, and the blood is prevented from being discharged into the left ventricle by mistake when the blood is discharged into the ascending aorta;
when the heart is in a systolic phase, a liquid pump in the blood storage device performs blood drawing operation, so that negative pressure is formed in the first cavity, the pressure on the upper side of the first valve is smaller than that on the lower side of the first valve, namely, the two sides of the first valve have positive pressure difference, when blood in the second tube flows to the first valve, the blood jacks up the first valve under the action of the positive pressure difference, so that the first end of the second tube is opened, the blood in the second tube can flow into the first cavity, so that the blood in the left ventricle sequentially passes through the suction hole, the second tube and the first cavity to enter the blood storage device, and the blood is temporarily stored by the blood storage device; meanwhile, the blood in the ascending aorta enters the first cavity through the blood discharge hole under the action of negative pressure, the blood jacks up the second valve, and the blood discharge hole is further closed by the second valve, so that the blood in the ascending aorta is prevented from being sucked into the blood storage device; wherein, blood flows along the extending direction from the second tube body to the first tube body in the process.
When the heart is in diastole, a liquid pump in the blood storage device performs blood pumping operation so as to pump blood into the first cavity, at the moment, the pressure on the upper side of the first valve is greater than the pressure on the lower side, namely negative pressure difference exists between the two sides of the first valve, and the blood in the first cavity presses the first valve on the first end of the second tube body so as to seal the first end of the second tube body and avoid pumping the blood into the left ventricle; when the blood in the first cavity flows to the second valve, the blood extrudes the second valve so as to open the blood discharge hole, and the blood in the first cavity can be discharged into the ascending aorta through the blood discharge hole, so that the blood in the blood storage device is conveyed into the ascending aorta sequentially through the first cavity and the blood discharge hole; wherein, blood flows along the extending direction from the first tube body to the second tube body in the process.
According to the balloon catheter disclosed by the invention, under the condition that the direction of blood flow is changed, the opening and closing state of the first end of the second tube body is controlled through the first valve, and the opening and closing state of the blood discharge hole is controlled through the second valve, so that the blood in the left ventricle is sucked into the blood storage device during the systole, and the blood in the blood storage device is pumped into the ascending aorta during the diastole, so that the blood ejection function is completed by assisting or completely replacing the heart, and the load of the heart is relieved; meanwhile, the second valve can prevent blood in the ascending aorta from being sucked into the blood storage device, and the first valve can prevent blood in the blood storage device from being pumped into the left ventricle, so that the reliability of the balloon catheter is improved; because the heart is alternately contracted and dilated, namely the blood drawing and the blood pumping of the balloon catheter are also alternately performed, the dynamic characteristics of the blood delivered by the balloon catheter are more consistent with the advection blood flow in a physiological state, and the damage to organs in the treatment process is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of a balloon catheter provided by the present invention;
FIG. 2 is a schematic view of a balloon catheter provided in accordance with the present invention in a systolic phase of the heart;
FIG. 3 is a schematic view of the balloon catheter provided in accordance with the present invention in a diastolic phase of the heart;
fig. 4 is a schematic structural diagram of the framework provided by the present invention.
Reference numerals are as follows:
1: a first pipe body; 11: a blood drainage hole; 12: an expansion part; 13: a switching part; 2: a second tube; 21: a suction hole; 22: a first segment; 23: a second segment; 3: a first valve; 4: a second valve; 5: a framework; 51: a first annular portion; 52: a second annular portion; 53: a connecting portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
A balloon catheter provided by the present invention will be described with reference to fig. 1 to 4.
As shown in fig. 1 to 3, the balloon catheter shown in the present embodiment includes: first body 1, second body 2, first valve 3 and second valve 4.
A first cavity is arranged in the first tube body 1, one end of the first tube body 1 is connected with the middle part of the second tube body 2, and the other end of the first tube body 1 is used for being communicated with a blood storage device; a blood discharge hole 11 is formed in the first tube body 1, and the blood discharge hole 11 is communicated with the first cavity; the first end of the second pipe body 2 extends into the first cavity, and the second end of the second pipe body 2 is provided with a suction hole 21; the first valve 3 and the second valve 4 are arranged in the first cavity, the first valve 3 is used for controlling the opening and closing state of the first end of the second tube body 2, and the second valve 4 is used for controlling the opening and closing state of the blood discharge hole 11; in practical application, the second end of the second tube 2 is inserted into the left ventricle, and the blood discharge hole 11 is placed in the ascending aorta, so that the blood in the left ventricle can enter the second tube 2 through the suction hole 21;
under the condition that the blood flows along the extending direction from the second tube body 2 to the first tube body 1, the first valve 3 opens the first end of the second tube body 2, and the second valve 4 closes the blood discharge hole 11;
in the case where blood flows in the extending direction of the first tube 1 to the second tube 2, the first valve 3 closes the first end of the second tube 2, and the second valve 4 opens the blood discharge hole 11.
Specifically, in the balloon catheter shown in the present embodiment, by arranging the first valve 3 and the second valve 4 in the first cavity of the first tube 1, the first valve 3 and the second valve 4 can be adaptively adjusted to the corresponding positions under the condition of changing the flow direction of blood, so as to intermittently deliver the blood in the left ventricle to the ascending aorta along with the contraction and relaxation of the heart, and simultaneously, avoid the blood in the ascending aorta from being sucked out of the body when sucking the blood from the left ventricle, and avoid the blood from being discharged into the left ventricle when discharging the blood into the ascending aorta;
referring to fig. 2, when the heart is in a systolic phase, a liquid pump in the blood storage device performs a blood drawing operation, so that negative pressure is formed in the first cavity, that is, the pressure on the upper side of the first valve 3 is smaller than the pressure on the lower side, that is, a positive pressure difference exists between two sides of the first valve 3, when the blood in the second tube 2 flows to the first valve 3, the blood jacks up the first valve 3 under the action of the positive pressure difference, so that the first end of the second tube 2 is opened, the blood in the second tube 2 can flow into the first cavity, so that the blood in the left ventricle sequentially passes through the suction hole 21, the second tube 2 and the first cavity to enter the blood storage device, and the blood is temporarily stored by the blood storage device; meanwhile, the blood in the ascending aorta enters the first cavity through the blood discharge hole 11 under the action of negative pressure, the blood jacks up the second valve 4, and the blood discharge hole 11 is further closed by the second valve 4, so that the blood in the ascending aorta is prevented from being sucked into the blood storage device; in the process, the blood flows along the extending direction from the second tube 2 to the first tube 1, and the flowing direction of the blood is indicated by arrows in fig. 2.
Referring to fig. 3, when the heart is in diastole, the liquid pump in the blood storage device performs a blood pumping operation to pump blood into the first chamber, at this time, the pressure on the upper side of the first valve 3 is greater than the pressure on the lower side, that is, there is a negative pressure difference between the two sides of the first valve 3, and the blood in the first chamber presses the first valve 3 against the first end of the second tube 2, so as to close the first end of the second tube 2, and thus avoid pumping blood into the left ventricle; when the blood in the first cavity flows to the second valve 4, the blood extrudes the second valve 4, so that the blood discharge hole 11 is opened, the blood in the first cavity can be discharged into the ascending aorta through the blood discharge hole 11, and the blood in the blood storage device is conveyed into the ascending aorta sequentially through the first cavity and the blood discharge hole 11; in the process, the blood flows along the extending direction of the first tube 1 to the second tube 2, and the flow direction of the blood is indicated by arrows in fig. 3.
The balloon catheter shown in the embodiment controls the open-close state of the first end of the second tube body 2 through the first valve 3 and controls the open-close state of the blood discharge hole 11 through the second valve 4 under the condition of changing the blood flow direction, so that the blood in the left ventricle is sucked into the blood storage device during the systole, and the blood in the blood storage device is pumped into the ascending aorta during the diastole, so that the blood ejection function is completed by assisting or completely replacing the heart, and the load of the heart is relieved; meanwhile, the second valve 4 can prevent blood in the ascending aorta from being sucked into the blood storage device, and the first valve 3 can prevent blood in the blood storage device from being pumped into the left ventricle, so that the reliability of the balloon catheter is improved; because the heart is alternately contracted and dilated, that is, the blood drawing and pumping of the balloon catheter shown in the embodiment are also alternately performed, the dynamic characteristics of the blood delivered by the balloon catheter are more consistent with the advection blood flow in a physiological state, and the damage to organs in the treatment process is reduced.
In some embodiments, as shown in fig. 1 to 3, the first pipe 1 of the present embodiment includes: an expansion part 12 and an adapter part 13; the first cavity is formed in the expansion part 12, a first end of the expansion part 12 is connected with the middle part of the second pipe body 2, and a second end of the expansion part 12 is communicated with the adapter part 13.
Specifically, the expansion part 12 is communicated with the blood storage device through the adapter part 13; the inflation portion 12 is an elastic body, and when an inward force is applied to the inflation portion 12 during the installation of the balloon catheter, the volume of the inflation portion 12 decreases, and after the installation is completed, the force is cancelled, and the volume of the inflation portion 12 increases, that is, the inflation portion 12 expands.
In some embodiments, as shown in fig. 1 to 3, the diameter of the expansion part 12 is gradually reduced in an extending direction from the middle of the expansion part 12 to the first end or the second end of the expansion part 12, and the blood discharge hole 11 is provided near the first end of the expansion part 12.
Specifically, inflation portion 12 is thick both ends thin fusiformis structure in the middle, and the diameter at inflation portion 12 both ends all is greater than the diameter of second body 2 and the diameter of switching portion 13, and the first cavity in inflation portion 12 can store a certain amount of blood promptly, then when drawing blood and pump blood and go on in turn, the blood flow that carries through first cavity is great, avoids appearing the problem that limited blood flow leads to being difficult to satisfy clinical treatment demand when the pipe diameter is less.
In some embodiments, as shown in fig. 2 and 3, one end of the first valve 3 is connected to the first end of the second tube 2, and the first valve 3 can swing relative to the second tube 2 under the action of blood, and it can be understood that the swing direction of the first valve 3 is the same as the flow direction of blood, so as to open or close the first end of the second tube 2; wherein, the covering area of the first valve 3 is larger than the area of the pipe orifice of the second pipe body 2.
Specifically, when a blood drawing operation is performed, blood pushes the first valve 3 to swing upwards, so that the first end of the second tube body 2 is opened, and the blood in the second tube body 2 can flow into the first cavity; during the blood pumping operation, the first valve 3 is pushed by the blood to swing downwards, so as to close the first end of the second tube body 2 and avoid pumping the blood into the left ventricle; the coverage area of the first valve 3 is set to be larger than the area of the pipe orifice of the second valve body 2, the sealing effect of the first valve 3 can be guaranteed, the pipe orifice of the second valve body 2 can play a good supporting and limiting role for the first valve 3, and the first valve 3 is prevented from excessively swinging into the second valve body 2.
In some embodiments, as shown in fig. 2 to 4, the balloon catheter of the present embodiment further comprises: a framework 5; the framework 5 is arranged in the first cavity, the framework 5 is sleeved on the second pipe body 2, a second cavity is defined between the framework 5 and the inner wall surface of the first cavity, and the blood discharge hole 11 is communicated with the second cavity; the framework 5 is provided with a communication port, and the second valve 4 is connected with the framework 5 so as to control the opening or closing of the communication port.
Specifically, a second cavity is defined by the side of the framework 5 facing the blood discharge hole 11, the inner wall surface of the first cavity and the outer wall surface of the second tube body 2, when a blood drawing operation is performed, a small amount of blood in the ascending aorta enters the second cavity through the blood discharge hole 11 and pushes the second valve 4 to swing upwards, so that the communication port is sealed by the second valve 4, the blood in the second cavity cannot flow into the first cavity, namely, the blood discharge hole 11 is sealed by the second valve 4, and the blood in the ascending aorta is prevented from being sucked into the blood storage device; when the blood pumping operation is performed, the second valve 4 is pushed by the blood in the first cavity to swing downwards, so that the communication port is opened by the second valve 4, the blood in the first cavity can flow into the second cavity through the communication port, and then is input into the ascending aorta through the blood discharge hole 11, namely, the blood discharge hole 11 is opened by the second valve 4.
In some embodiments, as shown in fig. 2 to 4, the skeleton 5 shown in the present embodiment includes: a first annular portion 51 and a second annular portion 52; the first annular portion 51 is sleeved on the outer wall surface of the second pipe body 2, the second annular portion 52 is sleeved on the outer side of the second pipe body 2 and connected with the inner wall surface of the first cavity, and a communication port is formed between the first annular portion 51 and the second annular portion 52; the diameter of the first annular portion 51 is smaller than that of the second annular portion 52, and one end of the second valve 4 is connected with the first annular portion 51; the second valve 4 can oscillate under the effect of the blood with respect to the second annular portion 52 to effect the opening or closing of the communication port.
Specifically, since the diameter of the first annular portion 51 is smaller than that of the second annular portion 52, the second valve 4 is bowl-shaped as a whole, when the second valve 4 swings toward the second annular portion 52, the second valve 4 is spread, and when the second valve 4 swings toward the second annular portion 52, the second valve 4 is gathered; when the second valve 4 is swung to the second annular portion 52, the second valve 4 is in a manner to overlap the second annular portion 52, so that a sealing surface is formed integrally by the second valve 4 to seal the region between the first annular portion 51 and the second annular portion 52.
In some embodiments, as shown in fig. 4, the framework 5 shown in the present embodiment includes: a plurality of connecting portions 53; a plurality of connecting portions 53 are arranged along the circumferential direction of the first annular portion 51, one end of the connecting portion 53 is connected to the first annular portion 51, and the other end of the connecting portion 53 is connected to the second annular portion 52, that is, the connecting portion 53 divides the area between the first annular portion 51 and the second annular portion 52 into a plurality of portions to form a plurality of communication ports between the first annular portion 51 and the second annular portion 52; the second valve 4 is provided with a plurality of second valves 4, and the plurality of second valves 4 are arranged in one-to-one correspondence with the plurality of communication ports.
Specifically, by arranging the connecting parts 53, the stability of the whole framework 5 is ensured, and when the second valve 4 swings to the second annular part 52, the second valve 4 can also be attached to the two adjacent connecting parts 53 in an adaptive manner, so that the connecting parts 53 support the second valve 4, the second valve 4 is prevented from swinging excessively, and the blocking effect of the second valve 4 on the communication port is ensured; through setting up a plurality of second valves 4, then blood is promoting under the circumstances that second valve 4 swung, and the flow of blood is comparatively even steady.
In some embodiments, as shown in fig. 2 and 3, the plurality of blood discharge holes 11 are provided, and the plurality of blood discharge holes 11 are provided in one-to-one correspondence with the plurality of communication ports.
Specifically, the blood discharge holes 11 and the communication ports are arranged in a one-to-one correspondence manner, so that when a blood drawing operation is performed, blood entering from the blood discharge holes 11 can directly act on the second valve 4 at the corresponding communication port, the sealing efficiency of the second valve 4 on the communication port is improved, and the blood in an ascending aorta is prevented from being sucked into the blood storage device; when the blood pumping operation is carried out, the blood in the first cavity can be smoothly discharged into the ascending aorta through the corresponding blood discharge hole 11 after pushing the second valve 4 away, so that the blood pumping efficiency is improved; because the intercommunication mouth is circumference and arranges, correspondingly, arranges blood hole 11 and also is circumference and arranges, and blood is discharged from a plurality of blood holes 11 respectively in the pump blood process, compares in a single blood hole 11, makes blood flow comparatively even steady through a plurality of blood holes 11 of arranging, has also guaranteed the volume of discharging simultaneously.
In some embodiments, as shown in fig. 1 to 3, the second tubular body 2 of the present embodiment includes a first section 22 and a second section 23, the second section 23 is in a circular truncated cone shape, and the first section 22 is in a cylindrical shape; the first section 22 is connected with the second section 23, the suction hole 21 is arranged on the conical surface of the second section 23, and the first section 22 is used for extending into the first cavity.
Specifically, by providing the second section 23 in a circular truncated cone shape and forming the suction hole 21 on the conical surface of the second section 23, the flow direction of blood in the suction hole 21 and the flow direction of blood in the first section 22 are at an acute angle, and compared with the case of forming the suction hole 21 on a straight tube, the flow direction of blood in the suction hole 21 and the flow direction of blood in the straight tube are at a right angle, the circular truncated cone-shaped second section 23 described in this embodiment can smoothly introduce blood in the left ventricle into the first section 22, and thus the resistance to blood flow is reduced.
In some embodiments, as shown in fig. 1 to 3, the suction holes 21 shown in the present embodiment are provided in plurality, and the plurality of suction holes 21 are uniformly distributed along the circumferential direction of the second segment 23.
Specifically, by uniformly distributing the plurality of suction holes 21 in the circumferential direction, the uniformity of blood suction in each direction is ensured while satisfying the amount of blood suction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A balloon catheter, comprising: the first valve body is connected with the second valve body;
a first cavity is arranged in the first pipe body, one end of the first pipe body is connected with the middle part of the second pipe body, and the other end of the first pipe body is used for being communicated with a blood storage device; a blood discharge hole is formed in the first tube body and communicated with the first cavity;
the first end of the second pipe body extends into the first cavity, and the second end of the second pipe body is provided with a suction hole;
the first valve and the second valve are arranged in the first cavity, the first valve is used for controlling the opening and closing state of the first end of the second tube body, and the second valve is used for controlling the opening and closing state of the blood discharge hole;
under the condition that blood flows along the extending direction from the second tube body to the first tube body, the first valve opens the first end of the second tube body, and the second valve closes the blood discharge hole;
under the condition that blood flows along the extending direction of the first tube body to the second tube body, the first valve closes the first end of the second tube body, and the second valve opens the blood discharge hole.
2. The balloon catheter of claim 1,
the first pipe body includes: the expansion part and the switching part;
the first cavity is formed in the expansion portion, the first end of the expansion portion is connected with the middle of the second pipe body, and the second end of the expansion portion is communicated with the switching portion.
3. The balloon catheter of claim 2,
the diameter of the expansion part is gradually reduced along the extension direction from the middle part of the expansion part to the first end or the second end of the expansion part, and the blood discharge hole is arranged close to the first end of the expansion part.
4. The balloon catheter of claim 1,
one end of the first valve is connected with the first end of the second pipe body, and the first valve can swing relative to the second pipe body under the action of blood so as to open or close the first end of the second pipe body;
wherein, the covering area of the first valve is larger than the area of the pipe orifice of the second pipe body.
5. The balloon catheter of claim 1,
the balloon catheter further comprises: a framework;
the framework is arranged in the first cavity, the framework is sleeved on the second pipe body, a second cavity is defined between the framework and the inner wall surface of the first cavity, and the blood discharge hole is communicated with the second cavity;
the framework is provided with a communication port, and the second valve is connected with the framework to control the opening or closing of the communication port.
6. A balloon catheter according to claim 5,
the skeleton includes: a first annular portion and a second annular portion;
the first annular part is sleeved on the outer wall surface of the second pipe body, the second annular part is sleeved on the outer side of the second pipe body and is connected with the inner wall surface of the first cavity, and the communication port is formed between the first annular part and the second annular part;
one end of the second valve is connected with the first annular part; the second valve can swing relative to the second annular part under the action of blood so as to open or close the communication port.
7. A balloon catheter according to claim 6,
the skeleton still includes: a plurality of connecting portions;
a plurality of connecting portions arranged along a circumferential direction of the first annular portion, one end of the connecting portion being connected to the first annular portion, and the other end of the connecting portion being connected to the second annular portion, so as to form a plurality of the communication ports between the first annular portion and the second annular portion;
the second valve is provided with a plurality of, a plurality of the second valve with a plurality of the intercommunication mouth one-to-one sets up.
8. The balloon catheter of claim 7,
the blood discharge holes are provided with a plurality of holes, and the blood discharge holes and the communication ports are arranged in a one-to-one correspondence mode.
9. The balloon catheter of claim 1,
the second pipe body comprises a first section and a second section, and the second section is in a circular truncated cone shape;
the first section is connected with the second section, and the suction hole is arranged on the conical surface of the second section.
10. The balloon catheter of claim 9,
the suction holes are provided with a plurality of which are uniformly distributed along the circumferential direction of the second section.
CN202210899991.6A 2022-07-28 2022-07-28 Balloon catheter Pending CN115212449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210899991.6A CN115212449A (en) 2022-07-28 2022-07-28 Balloon catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210899991.6A CN115212449A (en) 2022-07-28 2022-07-28 Balloon catheter

Publications (1)

Publication Number Publication Date
CN115212449A true CN115212449A (en) 2022-10-21

Family

ID=83612983

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210899991.6A Pending CN115212449A (en) 2022-07-28 2022-07-28 Balloon catheter

Country Status (1)

Country Link
CN (1) CN115212449A (en)

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