CN117482377A - Heart assisting device - Google Patents
Heart assisting device Download PDFInfo
- Publication number
- CN117482377A CN117482377A CN202311524054.3A CN202311524054A CN117482377A CN 117482377 A CN117482377 A CN 117482377A CN 202311524054 A CN202311524054 A CN 202311524054A CN 117482377 A CN117482377 A CN 117482377A
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- CN
- China
- Prior art keywords
- blood
- tube
- distal end
- guide tube
- rotary guide
- Prior art date
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Links
- 210000004369 blood Anatomy 0.000 claims abstract description 265
- 239000008280 blood Substances 0.000 claims abstract description 265
- 210000004204 blood vessel Anatomy 0.000 claims description 15
- 230000017531 blood circulation Effects 0.000 claims description 8
- 230000000740 bleeding effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 210000002376 aorta thoracic Anatomy 0.000 description 18
- 210000000709 aorta Anatomy 0.000 description 10
- 210000005240 left ventricle Anatomy 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 208000032843 Hemorrhage Diseases 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 210000000601 blood cell Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002861 ventricular 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
- 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
- A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
- A61M60/117—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body for assisting the heart, e.g. transcutaneous or external 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
-
- 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
-
- 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
- A61M60/30—Medical purposes thereof other than the enhancement of the cardiac output
- A61M60/39—Medical purposes thereof other than the enhancement of the cardiac output for blood transfusion
-
- 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
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/405—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being hydraulic or pneumatic
-
- 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
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
- A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
-
- 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
- A61M60/845—Constructional details other than related to driving of extracorporeal blood pumps
-
- 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
- A61M2025/0004—Catheters; Hollow probes having two or more concentrically arranged tubes for forming a concentric catheter system
-
- 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
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
- A61M2210/125—Heart
Abstract
The invention provides a heart auxiliary device, which comprises a blood transfusion tube and a supercharging device, wherein the supercharging device is arranged outside the body and connected with the blood transfusion tube, the blood transfusion tube comprises a blood suction tube and a blood suction tube coaxially nested outside the blood suction tube, a blood suction channel is formed by a hollow cavity of the blood suction tube, a blood suction channel is formed between the outer wall of the blood suction tube and the inner wall of the blood suction tube, and the proximal ends of the blood suction tube and the blood suction tube are connected with the supercharging device; the distal end of the blood outlet tube is arranged at a first position in an extending way; the distal end of the blood evacuation tube extends from the distal end of the blood evacuation tube into a second position; the outside of the blood drawing tube is nested to be provided with a rotary guide tube, the rotary guide tube is arranged at a first position, the far end of the rotary guide tube is connected with the outer wall of the blood drawing tube in a sealing way, and the near end of the rotary guide tube is covered outside the far end of the blood drawing tube and forms a blood return channel with the outer wall of the blood drawing tube. The invention changes the conveying mode of heart blood, reduces the cost and improves the safety performance.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a heart auxiliary device.
Background
Along with the change of diet safety problem and living environment, people gradually become the human distress problem due to physique, life habit or hereditary reasons, and the treatment of heart failure diseases not only requires the subtle operation skills of doctors, but also is indispensable by auxiliary instruments for heart operation, and the main heart auxiliary device on the market at present is an interventional heart pump.
The existing heart assist device comprises a delivery catheter 201, a heart pump 202, an electric connector 203 and a driving power supply 204, as shown in fig. 1, the delivery catheter 201, the heart pump 202, the electric connector 203 and the driving power supply 204 are sequentially connected, the driving power supply 204 is arranged outside a human body, the delivery catheter 201 enters the left ventricle 101 through the descending aorta 103, the aortic arch 102 and the ascending aorta 104, the heart pump 202 is positioned at the aortic arch 102 or the ascending aorta 104, the driving power supply 204 supplies power to the heart pump 202 through the electric connector 203, and when the heart pump 202 works, blood in the left ventricle 101 is pumped to the aortic arch 102 or the ascending aorta 104 through the heart pump 202 through the delivery catheter 201 and flows to the whole body through the descending aorta 103.
The interventional heart pump can provide abundant heart blood flow after being placed on a human body, but in the interventional process, parts are more, the operation is complicated in a ventricle, the volume of the heart pump 202 is required to be small enough, and the cost of the heart pump 202 with smaller volume is higher; the heart pump 202 has the potential thrombus hazards caused by the destruction of blood cells by mechanical operation in the working process, the problem of human body discomfort caused by the temperature rise of the heart pump 202 exists, and meanwhile, the various metal components adopted by the heart pump 202 have the potential exposure hazards and the danger of biocompatibility with human body exists.
Accordingly, there is a need to provide a heart assist device that addresses the above-described issues.
Disclosure of Invention
The embodiment of the invention provides a heart auxiliary device, which is connected with a blood transfusion tube placed in a heart through an extracorporeal pressurization device, so that the conveying mode of heart blood is changed, an interventional heart pump is not needed, the cost is reduced, and the safety performance is improved.
The heart auxiliary device comprises a blood transfusion tube and a supercharging device, wherein the supercharging device is arranged outside the body and connected with the blood transfusion tube, the blood transfusion tube comprises a blood suction tube and a blood suction tube coaxially nested outside the blood suction tube, a blood suction channel is formed by a hollow cavity of the blood suction tube, a blood suction channel is formed between the outer wall of the blood suction tube and the inner wall of the blood suction tube, and the blood suction tube and the proximal end of the blood suction tube are connected with the supercharging device;
the distal end of the blood outlet tube is arranged at a first position in an extending way;
the distal end of the blood drawing tube extends from the distal end of the blood drawing tube to a second position along with the blood drawing tube extending to the first position;
the blood drawing tube is provided with a rotary guide tube in a nested manner, the rotary guide tube is arranged at the first position, the distal end of the rotary guide tube is in closed connection with the outer wall of the blood drawing tube, and the proximal end of the rotary guide tube is covered outside the distal end of the blood outlet tube and forms a blood return channel with the outer wall of the blood outlet tube;
when the pressurizing device works, blood at the second position flows into the pressurizing device through the blood drawing channel, flows into the rotary guide tube from the blood drawing channel after being pressurized by the pressurizing device, and then flows out in a rotary way through the blood return channel.
Optionally, the pressurizing device includes an inlet and an outlet, the proximal end of the blood drawing tube is connected to the inlet of the pressurizing device, such that the blood drawing channel is in communication with the inlet, and the proximal end of the blood drawing tube is connected to the outlet of the pressurizing device, such that the blood drawing channel is in communication with the outlet.
Optionally, the cross-sectional areas of the bleeding channel and the blood drawing channel are equal, so that the blood flow passing through the bleeding channel and the blood drawing channel are equal, namely, the following relationship is satisfied:
；
wherein,for the inner diameter of the blood vessel, +.>For the inner diameter of the vessel, +.>Is the wall thickness of the blood pumping tube.
Optionally, the rotary guide tube is an elastic tube, and has a first state and a second state, wherein the first state is a natural state, and the second state is an expanded state; when the pressurizing device stops working, the rotary guide tube is in the first state, and the proximal end of the rotary guide tube extends along the blood drawing tube to the proximal end of the blood drawing tube so as to cover the distal end of the blood outlet tube; when the supercharging device works, the rotary guide tube is in the second state, the rotary guide tube expands under the fluid pressure in the bleeding channel, and a blood return channel is formed between the proximal end of the rotary guide tube and the distal end of the bleeding tube.
Optionally, a first connecting rib connected with the blood pumping tube is arranged at the distal end of the blood pumping tube, and the first connecting rib is obliquely extended from the end part of the blood outlet tube to the distal end of the blood pumping tube and connected with the outer wall of the blood pumping tube.
Optionally, the first connecting rib is located between the rotary guide tube and the blood drawing tube, and an included angle between the first connecting rib and the outer wall of the blood drawing tube is 15 ° -20 °.
Optionally, the first connecting ribs are a plurality of, and a plurality of first connecting ribs are circumferentially arranged at intervals at the end part of the blood outlet tube.
Optionally, the rotary guide tube is a fixed tube, a second connecting rib connected with the rotary guide tube is arranged at the distal end of the blood outlet tube, and the second connecting rib radially extends from the end part of the blood outlet tube to be connected with the proximal end of the rotary guide tube.
Optionally, the second connecting ribs are a plurality of, a plurality of second connecting ribs are circumferentially arranged at intervals at the end part of the blood outlet tube, a blood return port is formed between the adjacent second connecting ribs, and a plurality of blood return ports form the blood return channel.
Optionally, the blood transfusion catheter further comprises a pigtail catheter, wherein the pigtail catheter is connected with the distal end of the blood drawing tube; the distal end of the blood drawing tube is also provided with a blood drawing port communicated with the blood drawing channel, and the pigtail catheter is made of polyurethane.
Optionally, the pressurizing mode of the pressurizing device comprises hydraulic pressure, air pressure or servo propulsion, and the pressurizing device comprises a hydraulic pump, an electromagnetic valve or a servo motor.
Compared with the prior art, the technical scheme of the invention has the beneficial effects.
For example, by matching a pressurizing device arranged outside the body with a blood transfusion tube entering the body, the delivery mode of heart blood is changed, the blood transfusion tube is provided with a blood suction tube and a blood discharge tube which are coaxially nested, the blood suction tube extends to a second position, the blood discharge tube extends to a first position, and the blood in the first position is delivered to the second position through the blood discharge tube after being pressurized by the blood suction tube entering the pressurizing device; the blood pump is not required to be used for realizing the full transportation of blood, high cost and potential safety hazard caused by the use of the interventional type heart pump are avoided, the extracorporeal pressurization of the blood is realized through the blood transfusion catheter, and the extracorporeal operation is more convenient and is favorable for observing the change of the blood flow.
For example, a rotary guide tube is arranged outside the blood drawing tube, so that the flow direction of blood flowing out of the blood vessel is changed, and the abundant delivery of blood is facilitated.
For another example, the rotary guide tube adopts an elastic tube, has a smaller outer diameter in a natural state, and is beneficial to the operation of entering the heart by the blood transfusion tube.
Drawings
FIG. 1 is a schematic illustration of the use of a prior art heart assist device;
FIG. 2 is a schematic diagram illustrating the use of a heart assist device in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a blood transfusion tube according to an embodiment of the present invention;
FIG. 4 is a longitudinal cross-sectional view of a rotary guide tube according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a longitudinal cross-sectional view of another embodiment of the present invention at a swivel guide tube;
FIG. 7 is a cross-sectional view of another embodiment of the present invention at a swivel guide tube.
Reference numerals illustrate:
101. a left ventricle; 102. aortic arch; 103. descending aorta; 104. ascending aorta;
201. a delivery catheter; 202. a heart pump; 203. an electrical connection; 204. a driving power supply;
300. a supercharging device;
400. a blood transfusion tube;
410. exiting a blood vessel; 411. a bleeding channel; 412. a first connecting rib; 413. a second connecting rib; 414. a blood return port;
420. drawing blood vessels; 421. a blood drawing channel; 422. a blood drawing port;
430. a rotary guide tube; 431. a blood return channel; 432. a first state; 433. a second state;
440. pigtail catheter.
Detailed Description
In order to make the objects, features and advantageous effects of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the following detailed description is merely illustrative of the invention, and not restrictive of the invention. Moreover, the use of the same, similar reference numbers in the figures may indicate the same, similar elements in different embodiments, and descriptions of the same, similar elements in different embodiments, as well as descriptions of prior art elements, features, effects, etc. may be omitted. In the description of the present invention, the proximal end represents the end closer to the operator and the distal end represents the end farther from the operator; axial, radial, and circumferential refer to the axial, radial, and circumferential directions of the blood drawing tube 420.
Referring to fig. 2 to 7, an embodiment of the present invention provides a heart assist device.
Specifically, the heart assist device comprises a blood transfusion tube 400 and a pressurizing device 300, wherein the pressurizing device 300 is arranged outside the body and connected with the blood transfusion tube 400, the blood transfusion tube 400 comprises a blood suction tube 420 and a blood suction tube 410 coaxially nested outside the blood suction tube 420, a hollow cavity of the blood suction tube 420 forms a blood suction channel 421, a blood suction channel 411 is formed between the outer wall of the blood suction tube 420 and the inner wall of the blood suction tube 410, and the proximal ends of the blood suction tube 420 and the blood suction tube 410 are connected with the pressurizing device 300;
the distal extension of the outflow vessel 410 is disposed in a first position;
the distal end of the blood evacuation tube 420 extends from the distal end of the blood evacuation tube 410 into a second position as the blood evacuation tube 410 extends to the first position;
the outer part of the blood drawing tube 420 is nested with a rotary guide tube 430, the rotary guide tube 430 is arranged at a first position, the distal end of the rotary guide tube 430 is in closed connection with the outer wall of the blood drawing tube 420, and the proximal end of the rotary guide tube 430 is covered outside the distal end of the blood drawing tube 410 and forms a blood return channel 431 with the outer wall of the blood drawing tube 410;
when the pressurizing device 300 works, the blood at the second position flows into the pressurizing device 300 through the blood drawing channel 421, is pressurized by the pressurizing device 300, flows from the blood drawing channel 411 to the rotary guide tube 430, and then flows out in a rotary way through the blood return channel 431.
When the heart assist device is used for left ventricular assist transfusion, the first position is the aortic arch 102 or the ascending aorta 104, the second position is the left ventricle 101, and the distal end of the blood outlet vessel 410 extends from the descending aorta 103 to be arranged at the aortic arch 102 or the ascending aorta 104; the distal end of the blood evacuation tube 420 extends from the distal end of the blood evacuation tube 410 further into the left ventricle 101 as the blood evacuation tube 410 extends from the descending aorta 103 to the aortic arch 102 or the ascending aorta 104; the rotary guide tube 430 is disposed at the aortic arch 102 or ascending aorta 104; when the pressurizing device 300 is operated, blood in the left ventricle 101 flows into the pressurizing device 300 through the blood drawing channel 421, is pressurized by the pressurizing device 300, flows from the blood drawing channel 411 to the rotary guide tube 430, then flows to the descending aorta 103 through the blood return channel 431 in a rotary manner, and then flows to the whole body.
In a specific implementation, two parallel but non-uniform catheters may also be used as blood line 400, wherein a long catheter extends from the descending aorta 103 into the left ventricle 101 via the aortic arch 102 and the ascending aorta 104 as blood withdrawal catheter; the short catheter acts as a hemorrhage catheter, extending with the long catheter to the aortic arch 102 or ascending aorta 104. This solution has the following disadvantages: in the process of blood transfusion, there may be a long conduit and a short conduit at the same time, in which only one conduit has blood flowing through, that is, blood is unevenly distributed, so that uncertain torsion or swing occurs in parallel conduits in the process of blood transfusion, which is not beneficial to stable transportation of blood; in addition, even if both catheters are in blood circulation, the long catheter and the short catheter can twist or swing due to the opposite blood flow directions; compared with the scheme, the blood transfusion tube 400 is coaxially nested, namely the blood suction tube 420 and the blood suction tube 410 are coaxially arranged, torsion or swing is not easy to occur, the stability of the auxiliary device is greatly improved, the torsion is avoided, the smoothness of blood conveying is more favorable, the swing is avoided, the heart and blood vessels are more favorable to be protected, and the damage of organs is prevented.
In some embodiments, pressurizing device 300 includes an inlet and an outlet, with the proximal end of blood tube 420 being connected to the inlet of pressurizing device 300 such that blood collection channel 421 is in communication with the inlet, and the proximal end of blood tube 410 being connected to the outlet of pressurizing device 300 such that blood collection channel 411 is in communication with the outlet.
Optionally, the cross-sectional areas of the bleed channel 411 and the blood drawing channel 421 are equal, such that the blood flow through the bleed channel 411 and the blood drawing channel 421 are equal, i.e. the following relationship is satisfied:
；
wherein,for the inner diameter of the blood drawing tube 420 +.>Is the inner diameter of the blood vessel 410>Is the wall thickness of the blood drawing tube 420.
Referring to fig. 4 and 5, in some embodiments, the rotary guide tube 430 is an elastic tube, the rotary guide tube 430 has a first state 432 and a second state 433, the first state 432 is a natural state, and the second state 433 is an expanded state; when the pressurizing device 300 is not in operation, the rotary guide tube 430 is in the first state 432, the proximal end of the rotary guide tube 430 extends along the blood drawing tube 420 toward the proximal end of the blood drawing tube 420, and covers the distal end of the blood vessel 410; in operation of the pressurizing device 300, the rotary guide tube 430 is in the second state 433, the rotary guide tube 430 expands under the pressure of the fluid in the blood passageway 411, and a return blood passageway 431 is formed between the proximal end of the rotary guide tube 430 and the distal end of the blood passageway 410.
In some embodiments, the slewing guide tube 430 is made of an elastic material, and the slewing guide tube 430 is made of PVC, polyethylene, or polyetherimide.
In some embodiments, a first connecting rib 412 connected to the blood drawing tube 420 is disposed at the distal end of the blood drawing tube 410, the first connecting rib 412 extends obliquely from the end of the blood drawing tube 410 to the distal end of the blood drawing tube 420 to connect the outer wall of the blood drawing tube 420, the blood drawing tube 410 and the blood drawing tube 420 are coaxially disposed, the blood drawing tube 410 and the blood drawing tube 420 are connected through the first connecting rib 412 to avoid movement, and the fixation of the blood drawing tube 410 and the blood drawing tube 420 is realized, which is beneficial to the accurate positioning of the blood drawing tube 410 and the blood drawing tube 420.
In some embodiments, first coupling rib 412 is positioned between swivel guide tube 430 and blood drawing tube 420 such that first coupling rib 412 is at an angle of 15-20 to the outer wall of blood drawing tube 420.
In some embodiments, the first connecting ribs 412 are a plurality of, and the plurality of first connecting ribs 412 are circumferentially spaced apart at the end of the blood vessel 410.
In a specific implementation, when the rotary guide tube 430 is in the first state 432, the rotary guide tube 430 is tightly attached to the outer wall of the boundary between the blood drawing tube 420 and the blood tube 410, so that the rotary guide tube 430 has a smaller diameter, the surgical implantation diameter is reduced, when the blood in the blood tube 410 flows out, the rotary guide tube 430 is impacted by the blood to expand to assume the second state 433, and a blood return channel 431 is formed between the proximal end of the rotary guide tube 430 and the distal end of the blood tube 410, so that the blood returns to the descending aorta 103 and flows to the whole body.
Referring to fig. 6 and 7, in some embodiments, the rotary guide tube 430 is a fixed tube, the distal end of the blood vessel 410 is provided with a second connecting rib 413 connected to the rotary guide tube 430, the second connecting rib 413 extends radially from the end of the blood vessel 410 to connect to the proximal end of the rotary guide tube 430, and the second connecting rib 413 connects the blood vessel 410 to the rotary guide tube 430 to avoid play, so as to fix the blood vessel 410 to the rotary guide tube 430, which is beneficial to accurate positioning of the blood vessel 410 and the blood drawing tube 420.
In some embodiments, the plurality of second connecting ribs 413 are arranged at intervals along the circumferential direction at the end of the blood tube 410, a blood return port 414 is formed between adjacent second connecting ribs 413, and the plurality of blood return ports 414 form a blood return channel 431.
In some embodiments, blood line 400 further comprises a pigtail line 440, pigtail line 440 being connected to the distal end of blood withdrawal line 420; the distal end of the blood drawing tube 420 is also provided with a blood drawing port 422 communicated with a blood drawing channel 421, and the pigtail catheter 440 is made of polyurethane.
In particular implementations, the blood drawing tube 420 enters the left ventricle 101 with the pigtail guide tube 440 and is positioned.
In some embodiments, the pressurization means of the pressurization device 300 includes hydraulic, pneumatic, or servo propulsion, and the pressurization device 300 includes a hydraulic pump, a solenoid valve, or a servo motor.
In summary, in the heart assist device provided by the embodiment of the invention, the way of conveying heart blood is changed by matching the pressurizing device 300 arranged outside the body with the blood transfusion tube 400 entering the body, the blood transfusion tube 400 is provided with the blood suction tube 420 and the blood suction tube 410 which are coaxially nested, the blood suction tube 420 extends to the second position, the blood outlet tube 410 extends to the first position, and the blood at the second position enters the pressurizing device 300 through the blood suction tube 420 to be pressurized and then is conveyed to the first position through the blood outlet tube 410; the blood is not required to be fully conveyed by the heart pump, high cost and potential safety hazard caused by the use of the interventional heart pump are avoided, the extracorporeal pressurization of the blood is realized through the blood transfusion catheter 400, and the extracorporeal operation is more convenient and is beneficial to observing the change of the blood flow.
Further, in the embodiment of the present invention, the rotary guide tube 430 is arranged outside the blood drawing tube 420, so that the flow direction of the blood flowing out of the blood vessel 410 is changed, and the abundant delivery of the blood is facilitated.
Further, the swing guide 430 of the embodiment of the present invention adopts an elastic tube, which has a smaller outer diameter in a natural state, so as to facilitate the operation of the blood transfusion tube 400 into the heart.
Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure, even where only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless stated differently. In practice, the features of one or more of the dependent claims may be combined with the features of the independent claims where technically possible, according to the actual needs, and the features from the respective independent claims may be combined in any appropriate way, not merely by the specific combinations enumerated in the claims.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (11)
1. The heart assisting device is characterized by comprising a blood transfusion tube and a supercharging device, wherein the supercharging device is arranged outside the body and connected with the blood transfusion tube, the blood transfusion tube comprises a blood suction tube and a blood suction tube coaxially nested outside the blood suction tube, a blood suction channel is formed by a hollow cavity of the blood suction tube, a blood suction channel is formed between the outer wall of the blood suction tube and the inner wall of the blood suction tube, and the blood suction tube and the proximal end of the blood suction tube are connected with the supercharging device;
the distal end of the blood outlet tube is arranged at a first position in an extending way;
the distal end of the blood drawing tube extends from the distal end of the blood drawing tube to a second position along with the blood drawing tube extending to the first position;
the blood drawing tube is provided with a rotary guide tube in a nested manner, the rotary guide tube is arranged at the first position, the distal end of the rotary guide tube is in closed connection with the outer wall of the blood drawing tube, and the proximal end of the rotary guide tube is covered outside the distal end of the blood outlet tube and forms a blood return channel with the outer wall of the blood outlet tube;
when the pressurizing device works, blood at the second position flows into the pressurizing device through the blood drawing channel, flows into the rotary guide tube from the blood drawing channel after being pressurized by the pressurizing device, and then flows out in a rotary way through the blood return channel.
2. The heart assist device of claim 1 wherein the pressurizing device comprises an inlet and an outlet, the proximal end of the blood evacuation tube being connected to the inlet of the pressurizing device such that the blood evacuation channel is in communication with the inlet, the proximal end of the blood evacuation tube being connected to the outlet of the pressurizing device such that the blood evacuation channel is in communication with the outlet.
3. The heart assist device of claim 1 wherein the cross-sectional areas of the bleed passage and the blood withdrawal passage are equal such that blood flow through the bleed passage and the blood withdrawal passage are equal, satisfying the relationship:
；
wherein,for the inner diameter of the blood vessel, +.>For the inner diameter of the vessel, +.>Is the wall thickness of the blood pumping tube.
4. The heart assist device of claim 1 wherein the swivel guide tube is an elastic tube, the swivel guide tube having a first state and a second state, the first state being a natural state and the second state being an expanded state; when the pressurizing device stops working, the rotary guide tube is in the first state, and the proximal end of the rotary guide tube extends along the blood drawing tube to the proximal end of the blood drawing tube so as to cover the distal end of the blood outlet tube; when the supercharging device works, the rotary guide tube is in the second state, the rotary guide tube expands under the fluid pressure in the bleeding channel, and a blood return channel is formed between the proximal end of the rotary guide tube and the distal end of the bleeding tube.
5. The heart assist device of claim 4 wherein the distal end of the outlet vessel is provided with a first connecting rib connecting the blood evacuation vessel, the first connecting rib extending obliquely from the end of the outlet vessel to the distal end of the blood evacuation vessel connecting the outer wall of the blood evacuation vessel.
6. The heart assist device of claim 5 wherein the first connector rib is positioned between the rotary guide tube and the blood drawing tube, the first connector rib being positioned at an angle of 15 ° to 20 ° to the outer wall of the blood drawing tube.
7. The heart assist device of claim 5 wherein the plurality of first connecting ribs are circumferentially spaced at the end of the outflow vessel.
8. The heart assist device of claim 1 wherein the swivel guide tube is a fixed tube and the distal end of the outflow tube is provided with a second connecting rib connecting the swivel guide tube, the second connecting rib extending radially from the end of the outflow tube to connect the proximal end of the swivel guide tube.
9. The heart assist device of claim 8 wherein the plurality of second connecting ribs are circumferentially spaced at the end of the blood outlet tube, blood return ports are formed between adjacent second connecting ribs, and the plurality of blood return ports form the blood return channel.
10. The heart assist device of claim 1 wherein the blood line further comprises a pigtail line connected to the distal end of the blood withdrawal tube; the distal end of the blood drawing tube is also provided with a blood drawing port communicated with the blood drawing channel, and the pigtail catheter is made of polyurethane.
11. The heart assist device of claim 1 wherein the pressurizing means comprises hydraulic, pneumatic, or servo propulsion and wherein the pressurizing means comprises a hydraulic pump, solenoid valve, or servo motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311524054.3A CN117482377B (en) | 2023-11-15 | 2023-11-15 | Heart assisting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311524054.3A CN117482377B (en) | 2023-11-15 | 2023-11-15 | Heart assisting device |
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| CN117482377B CN117482377B (en) | 2024-04-09 |
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| CN117482377B (en) | 2024-04-09 |
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