CN111202877B - Percutaneous blood pump and perfusion system thereof - Google Patents
Percutaneous blood pump and perfusion system thereof Download PDFInfo
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- CN111202877B CN111202877B CN201811397573.7A CN201811397573A CN111202877B CN 111202877 B CN111202877 B CN 111202877B CN 201811397573 A CN201811397573 A CN 201811397573A CN 111202877 B CN111202877 B CN 111202877B
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- 230000010412 perfusion Effects 0.000 title claims abstract description 140
- 239000008280 blood Substances 0.000 title claims abstract description 52
- 210000004369 blood Anatomy 0.000 title claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 68
- 238000011049 filling Methods 0.000 claims abstract description 41
- 230000004913 activation Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 27
- 239000002504 physiological saline solution Substances 0.000 description 24
- 239000011780 sodium chloride Substances 0.000 description 23
- 208000007536 Thrombosis Diseases 0.000 description 13
- 238000010992 reflux Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000002513 implantation Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000004323 axial length Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 208000024172 Cardiovascular disease Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003578 releasing effect Effects 0.000 description 2
- 238000002054 transplantation Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement 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
- 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
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart 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
- 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
- A61M60/857—Implantable blood tubes
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/04—General characteristics of the apparatus implanted
Abstract
The invention relates to a percutaneous blood pump and a perfusion system thereof. The filling system comprises a starting part, a transmission assembly, a filling part and a backflow part which are connected in sequence. Wherein, transmission assembly includes transmission shaft, basket pipe and outer sheath pipe. A first perfusion channel is formed along the outer surface of the transmission shaft, a second perfusion channel is formed along the inner surface of the sheath tube, and the first perfusion channel and the second perfusion channel can be communicated. The filling part is provided with a filling opening communicated with the second filling channel. The backflow part is provided with a backflow port communicated with the first filling channel. Above-mentioned percutaneous axial flow blood pump fills the system because and first filling channel and second fill the passageway and can be linked together to only need set up one and fill the mouth and can fill two channels simultaneously, simple structure, convenient operation.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a percutaneous blood pump and a perfusion system thereof.
Background
In modern times, cardiovascular disease has become a significant cause of human death, and heart transplantation is an effective means of treating patients with critical heart disease, however, in reality, there are far more heart recipients than heart donors, resulting in death of patients awaiting heart transplantation. The percutaneous axial flow blood pump can assist the heart to pump blood, and is a common device for assisting in treating cardiovascular diseases.
Generally, problems such as thrombus blockage or overhigh bearing temperature can be caused during the use of the percutaneous axial blood pump, and therefore, the physiological saline needs to be periodically poured into a pouring system of the percutaneous axial blood pump to prevent thrombus from forming and lubricate and cool the bearing. Because of different perfusion purposes, a common percutaneous axial blood pump generally divides a perfusion system into two parts, namely a perfusion system which is positioned between an outer sleeve and a middle sleeve and used for washing thrombus and a perfusion system which is positioned between the middle sleeve and a transmission shaft and used for lubricating and cooling a bearing, wherein the two perfusion systems are designed independently. During operation, the normal saline is injected into the space between the outer sleeve and the middle sleeve from one injection port, and then the normal saline is injected into the space between the middle sleeve and the transmission shaft from the other injection port. The operation process is complicated, and once saline is injected into the channel in error due to the negligence of a doctor, a part of the region is lack of perfusate, so that thrombus is accumulated or the temperature is too high, and the design of the perfusion channel is complicated due to more perfusion openings at the proximal end of the perfusion system, for example, an additional hole is needed on the transmission shaft to enable the perfusion system between the middle layer sleeve and the transmission shaft to form a loop.
Disclosure of Invention
In view of the above, there is a need to provide a percutaneous blood pump and perfusion system thereof.
The invention provides a perfusion system for a percutaneous blood pump, which comprises a starting part, a transmission assembly, a perfusion part and a reflux part which are sequentially connected, wherein:
the activation portion comprises a compressible basket;
the transmission assembly comprises a transmission shaft, a basket pipe and an outer sheath pipe which are sequentially sleeved from inside to outside, wherein the basket pipe is connected with the compressible basket, the compressible basket has a first state of extending out of the outer sheath pipe or a second state of being compressed in the outer sheath pipe, and the basket pipe is different from the outer sheath pipe in position in the first state and the second state; a first perfusion channel is formed along the outer surface of the transmission shaft, and a second perfusion channel is formed along the inner surface of the outer sheath; the first perfusion channel is communicable with the second perfusion channel when the compressible basket is extended out of the outer sheath;
the pouring part is provided with a pouring port, and the pouring port is communicated with the second pouring channel; and the number of the first and second groups,
the backflow part is provided with a backflow port, and the backflow port is communicated with the first filling channel.
In one embodiment, the starting part further comprises:
compressible paddles disposed within the compressible basket and connected to the drive shaft; and the number of the first and second groups,
the starting pipe is sleeved outside the compressible net basket and connected with one end, far away from the perfusion part, of the outer sheath pipe.
In one embodiment, the compressible basket is made of a shape memory alloy.
In one embodiment, the transmission assembly further comprises:
the inner sheath pipe is sleeved outside the transmission shaft, is at least partially positioned in the outer sheath pipe and is connected with one end of the basket pipe, which is far away from the compressible basket; and
the bearing sleeve is sleeved outside the transmission shaft and arranged in the basket pipe, and a first bearing and a second bearing are arranged at two ends of the bearing sleeve respectively.
In one embodiment, the basket tube has a through hole, and when the basket tube moves relative to the sheath tube, the through hole is selectively opened or closed, so that the first perfusion channel and the second perfusion channel are selectively communicated or disconnected.
In one embodiment, the number of the through holes is multiple, and the through holes are distributed along the axial direction of the basket pipe and/or the circumferential direction of the basket pipe.
In one of the embodiments, the first and second electrodes are,
a first gap is formed between the inner sheath tube and the transmission shaft; a second gap is formed between the bearing sleeve and the transmission shaft, and the first gap is communicated with the second gap in a fluid mode to form the first pouring channel; a third gap is arranged between the outer sheath tube and the inner sheath tube, a fourth gap is arranged between the outer sheath tube and the basket tube, and the third gap is communicated with the fourth gap in a fluid mode to form the second perfusion channel.
In one embodiment, when the compressible basket is compressed into the outer sheath, the basket tube moves relative to the bearing sleeve in a direction close to the activation part, the through hole is closed by the bearing sleeve, and the first perfusion channel is disconnected from the second perfusion channel;
when the compressible basket extends out of the outer sheath tube, the basket tube slides relative to the bearing sleeve towards the direction far away from the starting part, the through hole is opened, and the first perfusion channel is communicated with the second perfusion channel.
In one embodiment, the inner wall of the basket pipe is provided with a projection, the outer wall of the bearing sleeve is provided with a limiting groove, and the projection is in sliding fit with the limiting groove to limit the axial movement range of the basket pipe.
In one embodiment, the transmission assembly further includes a sealing ring, and the sealing ring is sleeved outside one end of the transmission shaft close to the starting portion to seal one end of the first filling channel close to the starting portion.
In one embodiment, the perfusion portion includes a rotary lock, and the rotary lock is located at an end of the outer sheath far from the activating portion and is sleeved outside the inner sheath to lock the outer sheath to the inner sheath.
In one embodiment, the perfusion opening is provided with a first liquid guide pipe, and one end of the first liquid guide pipe, which is far away from the perfusion part, is connected with a three-way valve.
In one embodiment, the reflux port is provided with a second liquid guide pipe, and one end of the second liquid guide pipe, which is far away from the reflux part, is connected with a negative pressure suction device.
In one embodiment, the inner wall of the outer sheath tube is provided with a groove, and the extending direction of the groove is consistent with the axial direction of the outer sheath tube.
In one embodiment, the groove is a square groove or an arc groove.
The invention also provides a percutaneous blood pump comprising any one of the perfusion systems.
The percutaneous blood pump and the perfusion system thereof form a first perfusion channel for cooling and lubricating the bearing along the outer surface of the transmission shaft, and form a second perfusion channel for flushing thrombus along the inner surface of the outer sheath tube. Because when the compressible basket stretches out the outer sheath pipe-hour, first filling channel can be linked together with the second filling channel to only need set up one on the portion of pouring into and fill the mouth and can fill two channels simultaneously, the simple operation has also prevented that the doctor from filling the mouth and leading to the accident to take place because of making mixing, and only set up one in the portion of pouring into the mouth, also makes the passageway that fills of portion of pouring simplify, has reduced the production technology degree of difficulty. Furthermore, the return port is directly communicated with the first filling channel, so that the waste physiological saline in the first filling channel can be discharged from the return port without additionally forming a hole in the transmission shaft, and the production process is further simplified.
Drawings
FIG. 1 is a diagram of an embodiment percutaneous axial blood pump perfusion system;
FIG. 2 is a cross-sectional view of an activation portion of the percutaneous axial blood pump perfusion system shown in FIG. 1;
FIG. 3 is a cross-sectional view of a drive assembly of the percutaneous axial blood pump infusion system shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a perfusion portion and a reflux portion of the perfusion system of the percutaneous axial blood pump shown in FIG. 1;
FIG. 5 is a cross-sectional view of the infusion section of the percutaneous axial blood pump infusion system shown in FIG. 4;
FIG. 6 is a cross-sectional view of the return portion of the percutaneous axial blood pump perfusion system shown in FIG. 4;
FIG. 7 is a cross-sectional view of the drive assembly shown in FIG. 3, with the compressible baskets in a compressed state;
FIG. 8 is a schematic structural view of a basket tube of the transmission assembly shown in FIG. 3;
FIG. 9 is a schematic structural view of a basket tube of another embodiment of a transmission assembly;
FIG. 10 is a schematic structural view of a basket tube of a transmission assembly according to yet another embodiment;
FIG. 11 is a schematic structural diagram of an outer sheath of the transmission assembly according to an embodiment;
fig. 12 is a schematic structural view of an outer sheath of a transmission assembly according to another embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-6, an embodiment of the present application provides a percutaneous axial blood pump perfusion system 100 for perfusing a physiological saline solution into a percutaneous axial blood pump to prevent thrombosis in the percutaneous axial blood pump and lubricate and cool bearings in the percutaneous axial blood pump. Specifically, the percutaneous axial blood pump perfusion system 100 of an embodiment includes a starting portion 140, a transmission assembly 110, a perfusion portion 120, and a reflux portion 130 connected in sequence. Wherein the activation portion 140 includes a compressible basket 142, the compressible basket 142 may be compressed or expanded. The transmission assembly 110 is used to transmit motor torque to drive a paddle pump of a percutaneous axial blood pump. The perfusion unit 120 is used to inject physiological saline into the percutaneous axial blood pump perfusion system 100. The reflux unit 130 is used to discharge the waste physiological saline solution.
Specifically, as shown in fig. 2 and fig. 3, the transmission assembly 110 includes a transmission shaft 111, a basket pipe 114, and an outer sheath pipe 115, which are sequentially sleeved. Specifically, the transmission shaft 111 is connected to a blade of the percutaneous axial blood pump, and is configured to transmit a torque of the motor to the blade of the percutaneous axial blood pump, so as to drive the blade of the percutaneous axial blood pump to rotate, thereby pumping blood. Further, a first filling channel is formed along the outer surface of the transmission shaft 111, so that after the first filling channel is filled with physiological saline, the physiological saline can lubricate and cool the transmission shaft 111 and the bearings on the transmission shaft along the first filling channel. In one embodiment, the transmission shaft 111 is a hollow flexible shaft.
The basket pipe 114 is sleeved outside the transmission shaft 111, and one end of the basket pipe 114 is fixedly connected with the compressible basket 142 (see fig. 2), for example, the basket pipe 114 can be connected with the compressible basket 142 by adhesion. Further, because the compressible basket 142 has a characteristic (due to the weaving process or material characteristics) that the length in the compressed state is less than the length in the extended state, when the compressible basket 142 is in a first state extended out of the outer sheath tube 115, the length thereof is lengthened, thereby causing the basket tube 114 to move away from the activation portion 140, and when the compressible basket 142 is in a second state retracted within the outer sheath tube 115, the length thereof is shortened, thereby causing the basket tube 114 to move relative to the direction toward the activation portion 140. The basket tube 114 is located at a different position relative to the sheath tube 115 in the first state and the second state.
The sheath tube 115 is sleeved outside the basket tube 114, and a second perfusion channel is formed along the inner surface of the sheath tube 115, because the thrombus of the percutaneous axial flow blood pump is easily formed at one end, namely the proximal end, far away from the perfusion part 120 of the transmission component 110, and after the physiological saline is perfused, the physiological saline can flow into the human body along the second perfusion channel to wash the proximal end of the transmission component 110, so that the thrombus at the proximal end of the transmission component 110 is prevented.
Further, when the compressible basket 142 extends out of the sheath tube 115, the first perfusion channel and the second perfusion channel can be communicated, so that after the physiological saline is perfused, the physiological saline can be mutually communicated between the first perfusion channel and the second perfusion channel.
As shown in fig. 4 and 5, the perfusion unit 120 is connected to an end of the sheath tube 115 away from the activation unit, and a perfusion port 121 is formed in the perfusion unit 120, and the perfusion port 121 is used for injecting saline. The filling opening 121 is communicated with the second filling channel, and since the first filling channel can be communicated with the second filling channel when the compressible basket 142 extends out of the sheath tube 115, the first filling channel and the second filling channel can be filled with physiological saline through the filling opening 121.
As shown in fig. 4 and 6, the backflow portion 130 is sleeved on one end of the inner sheath 112, the backflow portion 130 is provided with a backflow port 131, and the backflow port 131 is communicated with the first perfusion channel, so that the physiological saline in the first perfusion channel can flow out from the backflow port 131 after lubricating and cooling the transmission shaft 111.
The percutaneous axial flow blood pump perfusion system forms a first perfusion channel for cooling and lubricating the bearing along the outer surface of the transmission shaft, and can form a second perfusion channel for flushing thrombus along the inner surface of the outer sheath pipe. Because when the compressible basket stretches out of the outer sheath pipe, the first filling channel can be communicated with the second filling channel, so that two filling channels can be filled simultaneously only by arranging one filling port 121 on the filling part 120, the operation is convenient, the accident caused by the mixing of the filling ports by a doctor is prevented, in addition, only one filling port 121 is arranged on the filling part 120, the filling channel of the filling part 120 is simplified, and the production process difficulty is reduced. Further, in the conventional percutaneous axial blood pump perfusion system, a hole must be formed in the transmission shaft to enable a perfusion channel of the perfusion bearing to form a loop, so that the processing technology of the transmission shaft is complex. In the present application, the return port 131 is directly communicated with the first filling channel, so that the waste saline in the second filling channel and the first filling channel which are communicated can be directly discharged from the return port without an additional hole in the transmission shaft 111, thereby further simplifying the production process.
Specifically, with reference to fig. 2 and 3, in one embodiment, the actuating portion 140 further includes a compressible paddle 141 and an actuating tube 143, and further, the compressible paddle 141, the compressible basket 142 and the actuating tube 143 are sequentially sleeved. Wherein, the compressible paddle 141 is connected with the transmission shaft 111, so that the transmission shaft 111 can transmit the torque of the motor 200 to the compressible paddle 141 to drive the compressible paddle 141 to rotate. The compressible paddles 141 extend out of the outer sheath 115 or retract within the outer sheath 115 along with the compressible basket 142. The actuating tube 143 is disposed outside the compressible basket 114 and is connected to an end of the outer sheath 115 distal from the irrigation portion 120. for example, the actuating tube 143 may be removably connected to the outer sheath 115 by a rotational lock.
Further, the initial state of the compressible paddles 141 and the compressible basket 142 are both the deployed state, as shown in fig. 2. At the beginning of the operation, the doctor may inject physiological saline into the percutaneous axial blood pump perfusion system 100 through the perfusion opening 121 in vitro until the physiological saline fills the starting tube 143, and at this time, the percutaneous axial blood pump perfusion system 100 may be considered to be filled with the physiological saline, so as to prevent air from remaining in the percutaneous axial blood pump perfusion system 100. The compressible basket 142 and compressible paddles 141 are then pulled back into the outer sheath 115 by hand grasping forceps 132 (see fig. 4) attached to the inner sheath 112, causing the compressible basket 142 and compressible paddles 141 to contract for implantation into the heart. The initiator tube 143 is then removed, completing the pre-implantation preparation.
Specifically, in one embodiment, the compressible basket 142 is made of a shape memory alloy having good compressibility and resiliency, and the compressible basket 142 has a braided structure such that the axial length of the compressible basket 142 when the compressible basket 142 is in the expanded state (fig. 2 state) is greater than the axial length of the compressible basket 142 when the compressible basket 142 is in the contracted state, such that the compressible basket 142 can drive the basket tube 114 to move toward the activation portion 140 when the compressible basket 142 is in the compressed state. When the compressible basket 142 is in the expanded state, the compressible basket 142 can drive the basket tube 114 to move away from the activation portion 140.
Specifically, referring to fig. 3, in one embodiment, the transmission assembly further includes an inner sheath 112 and a bearing housing 113. The inner sheath 112 is sleeved outside the transmission shaft 111, and the inner sheath 112 is connected to one end of the basket pipe 114 far away from the compressible basket 142, so that the inner sheath 112 and the basket pipe 114 can move synchronously. Further, a first gap 1121 is provided between the inner sheath tube 112 and the drive shaft 111, and the first gap 1121 is not less than 0.1mm and not more than 1.0 mm.
The bearing sleeve 113 is rotatably sleeved outside the transmission shaft 111 and the bearing sleeve 113 is arranged in the basket pipe 114. Specifically, the bearing housing 113 is disposed side by side with the inner sheath tube 112. A first bearing 113a and a second bearing 113b are respectively embedded at two ends of the bearing housing 113 to support the transmission shaft 111 to rotate. Further, a second gap 1131 is formed between the bearing sleeve 113 and the transmission shaft 111, and the second gap 1131 is not smaller than 0.01mm and not larger than 0.1 mm. Further, the second gap 1131 communicates with the first gap 1121, so that the second gap 1131 and the first gap 1121 can form a first perfusion channel.
Further, a third gap 1122 is provided between the outer sheath tube 115 and the inner sheath tube 112, and the third gap 1122 is not less than 0.1mm and not more than 1.0 mm. A fourth gap 1141 is formed between the sheath tube 115 and the basket tube 114, and the fourth gap 1141 is not less than 0.01mm and not more than 0.2 mm. Third gap 1122 communicates with fourth gap 1141 such that third gap 1122 and fourth gap 1141 form a second perfusion channel.
Specifically, the basket tube 114 is provided with a through hole 1141, so that the first perfusion channel and the second perfusion channel can be communicated. Specifically, after the saline is injected into the injection port 123, the saline can flow into the fourth gap 1141 through the third gap 1122, and a portion of the saline entering the fourth gap 1141 flows into the heart along the fourth gap 1141 to prevent thrombus from occurring at the proximal end of the transmission assembly 110. Another portion of the saline flows into the first filling channel through the through hole 1142 and flows through the second gap 1131 to lubricate and cool the first bearing 113a, the second bearing 113b and the transmission shaft 111. And finally flows through the first gap 1121 and flows out of the return port 131.
Further, when the compressible basket 142 is contracted or expanded to drive the basket tube 114 to move relative to the sheath tube 115, the relative positions of the basket tube 114 and the bearing sleeve 113 are correspondingly changed, and the through hole 1141 is selectively opened or closed, so that the first perfusion channel and the second perfusion channel are selectively communicated or disconnected. Specifically, the inner wall of the basket pipe 114 is provided with a projection 1143, the outer wall of the bearing sleeve 113 is provided with a limiting groove 1132, and the projection 1143 can be in sliding fit with the limiting groove 1132, so as to limit the axial movable range of the basket pipe 114. Further, since one end of the basket tube 114 is fixedly connected to the compressible basket and the other end is fixedly connected to the inner sheath tube 112, when the outer sheath tube 115 moves toward the starting portion 140, the compressible basket 142 is contracted inside the outer sheath tube 115, and the axial length of the compressible basket 142 is shortened, so that the basket tube 114 slides relative to the bearing sleeve 113 toward the starting portion 140, until the protrusion 1143 is located at the end of the limiting groove 1132 near the starting portion 140, and the through hole 1142 is closed by the bearing sleeve 113, as shown in fig. 7. At this time, the first perfusion channel is disconnected from the second perfusion channel. When the movable outer sheath 115 moves toward the backflow portion 130, the compressible basket 142 extends out of the outer sheath 115, the compressible basket 142 returns to the expanded state, and the axial length of the compressible basket 142 is increased, so that the basket 114 drives the inner sheath 112 to slide toward the perfusion portion 120 relative to the bearing sleeve 113, until the protrusion 1143 is located at one end of the limiting groove 1132 close to the perfusion portion 120, as shown in fig. 3, a cavity 1144 is formed between the bearing sleeve 113 and the inner sheath 112 in the axial direction, so that the through hole 1142 is opened, and the first perfusion channel and the second perfusion channel are communicated again.
The first perfusion channel and the second perfusion channel can be selectively connected or disconnected, so that when the compressible basket 1142 is contracted in the outer sheath tube, i.e. the first perfusion channel and the second perfusion channel are disconnected, the flow of the saline flowing into the second channel can be more accurately grasped. It should be noted that, in another embodiment, when the compressible basket 1142 is retracted into the outer sheath, the through hole 1142 may not be completely closed, i.e. the first perfusion channel and the second perfusion channel are kept in communication, and at this time, only the perfusion amount of the saline needs to be increased, so as to ensure that no air remains in the second perfusion channel.
Specifically, referring to fig. 9 and 10, in one embodiment, the number of the through holes 1142 on the basket pipe 114 is plural, and the plural through holes 1142 are distributed along the circumference of the basket pipe 114. Further, as shown in fig. 9, the plurality of through holes 1142 may also form a structure of a plurality of rows of through holes along the axial direction of the basket pipe 114. To increase the flow rate of the saline flowing into the first filling channel, thereby more effectively lubricating and cooling the first bearing 113a, the second bearing 113b and the transmission shaft 111. In another embodiment, as shown in FIG. 10, the through hole 1142 may be configured as a square through hole, thereby also serving the purpose of increasing the flow rate of the physiological saline flowing into the first perfusion passage.
Referring to fig. 11-12, in one embodiment, the inner wall of the outer sheath 115 is formed with a groove 1151, and the groove 1151 extends in the same direction as the outer sheath 115. Further, the number of the grooves 1151 may be plural, and the plural grooves 1151 are distributed on the inner wall of the outer sheath 115 along the circumference of the outer sheath 115. Further, the length of the groove 1151 may be the same as the length of the outer sheath 115 or may be shorter than the length of the outer sheath 115. The volume of second perfusion channel can be increased to the recess to increase normal saline's the volume of infusing and wash away the area, can effectively prevent the formation and the pile up of thrombus. In one embodiment, the groove 1151 is a square groove, as shown in FIG. 11. In another embodiment, groove 1151 is an arcuate groove, as shown in FIG. 12.
Specifically, referring to fig. 3, in one embodiment, the transmission assembly 110 further includes a sealing ring 116, and the sealing ring 116 is disposed at an end of the transmission assembly 110 near the activation portion 140. Further, the sealing ring 116 is sleeved outside the transmission shaft 111 and is abutted against the inner wall of the basket pipe 114, so that one end of the first perfusion channel, which is close to the starting part 140, is blocked, physiological saline in the first perfusion channel is prevented from entering the body, and blood is also prevented from entering the first perfusion channel. Further, the sealing ring 116 is made of silica gel or rubber-like material.
Specifically, referring to fig. 4 and 5, in one embodiment, the perfusion opening 121 of the perfusion portion 120 is provided with a first catheter 122, and the first catheter 122 can be used for directly connecting with a saline bag to introduce saline. Further, a three-way valve 123 may be connected to an end of the first catheter 122 away from the perfusion unit 120, so that the three-way valve 123 may be used to inject other drugs into the patient while injecting the physiological saline.
Specifically, in one embodiment, the pouring section 120 further includes a rotation lock 124, the rotation lock 124 is disposed at an end of the outer sheath 115 and sleeved outside the inner sheath 112, and the rotation lock 124 is used to lock the outer sheath 115 to the inner sheath 112. Specifically, the outer sheath 115 and the inner sheath 112 can slide relative to each other by releasing the rotation lock 124, and at this time, the outer sheath 115 and the inner sheath 112 can be controlled to slide relative to each other by the hand-held clamp 132 fixed to the inner sheath 112, so as to control the retraction or the expansion of the compressible basket 142 and the compressible paddle 141. Further, the pouring opening 121 may be directly opened on the rotational lock 124.
Specifically, referring to fig. 4 and fig. 6, in one embodiment, the reflux port 131 of the reflux portion 130 is provided with a second liquid guide pipe 133, and a negative pressure suction device (not shown) is connected to one end of the second liquid guide pipe 133 far away from the reflux portion 130. Thereby controlling the outflow of the saline. Further, a three-way valve 134 may be provided on the second catheter 133 to connect the negative pressure suction device and the waste liquid bag at the same time. Further, the return portion 130 may be directly provided on the motor handle 210 of the motor 200.
The operation flow of the percutaneous axial blood pump perfusion system 100 of an embodiment is as follows:
before the implantation operation begins, the compressible basket 142 and the compressible paddle 141 are placed in the starting tube 143 and outside the sheath tube 115, and the three-way valve 123 is opened, so that the saline in the saline bag flows into the percutaneous axial blood pump perfusion system 100 through the first catheter 122, and then flows into the starting tube 140 through the third gap 1122 and the fourth gap 1141. After the starter tube 140 is filled with saline, the percutaneous axial blood pump perfusion system 100 may be considered to be filled with saline. The outer sheath 115 is released by rotating the lock 124 and the compressible basket 142 and the compressible paddles 141 are pulled back into the outer sheath 115 by the hand-held clamp 132 attached to the inner sheath 112, with the compressible basket 142 out of the deployment tube 143. At this time, the protrusion 1143 of the basket tube 114 is located at one end of the limiting groove 1132 near the actuating portion 140, the through hole 1142 is blocked by the bearing sleeve 113, and the saline cannot enter the first gap 1121 and the second gap 1131 through the through hole 1142 (as shown in fig. 7). At this point, the actuation tube 143 may be removed, the rotation lock 124 locked, and the implantation procedure of the percutaneous axial blood pump may begin.
After the percutaneous axial flow blood pump reaches the implantation position, the hand-held clamp 132 is held tightly, the rotating lock 124 is released, and the sheath tube 115 is pulled towards one end of the operator through the rotating lock 124, at this time, the compressible blades 141 and the compressible basket 142 naturally expand and extend out of the sheath tube 115 due to the self-releasing property, and the compressible blades 141 and the compressible basket 142 are in an expanded state. At this time, the protrusion 1143 of the basket tube 114 is located at one end of the limiting groove 1132 near the perfusion portion 120, a cavity 1144 is formed between the bearing sleeve 113 and the inner sheath tube 112, and the through hole 1142 is opened. At this time, the physiological saline continues to be injected into the percutaneous axial blood pump perfusion system 100 through the first catheter 122, and at the same time, the negative pressure suction device is activated, and while the air in the first gap 1121 is extracted, a part of the physiological saline continues to flow to the proximal end of the percutaneous axial blood pump perfusion system 100 through the third gap 1122 and the fourth gap 1141 until the physiological saline flows into the blood, so as to prevent thrombus from being generated. Another portion of the saline is sucked into the basket tube 114 through the through holes 1142 of the basket tube 114, and then a portion of the saline may flow into the second gap 1131 to lubricate and cool the first bearing 113a, the second bearing 113b and the transmission shaft 111. A portion of the saline flows back to the return port through the first gap 1121, and when the saline is present in a waste bag (not shown) connected to the second catheter 133, it indicates that all gaps between the components of the percutaneous axial blood pump perfusion system 100 are filled with saline. At this time, the percutaneous axial blood pump perfusion system 100 can be started, and the perfusion speed of the physiological saline and the arrangement of the negative pressure suction device are adjusted, so that a part of the physiological saline perfused into the percutaneous axial blood pump perfusion system 100 continuously washes the second perfusion channel, and thrombus is prevented from being generated at the proximal end of the transmission assembly 110. The other part of the normal saline enters the first perfusion channel to lubricate and cool the transmission shaft 111, the first bearing 113a and the second bearing 113b, so as to ensure the smooth operation of the percutaneous axial flow blood pump.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (16)
1. The utility model provides a filling system for percutaneous blood pump which characterized in that, includes the start-up portion, transmission assembly, the portion of infusing and the backward flow portion that connect gradually, wherein:
the activation portion comprises a compressible basket;
the transmission assembly comprises a transmission shaft, a basket pipe and an outer sheath pipe which are sequentially sleeved from inside to outside, wherein the basket pipe is connected with the compressible basket, the compressible basket has a first state of extending out of the outer sheath pipe or a second state of being compressed in the outer sheath pipe, and the basket pipe is different from the outer sheath pipe in position in the first state and the second state; a first perfusion channel is formed along the outer surface of the transmission shaft, and a second perfusion channel is formed along the inner surface of the outer sheath; the first perfusion channel is in communication with the second perfusion channel when the compressible basket is extended outside the outer sheath;
the pouring part is provided with a pouring port, and the pouring port is communicated with the second pouring channel; and the number of the first and second groups,
the backflow part is provided with a backflow port, and the backflow port is communicated with the first filling channel.
2. The perfusion system of claim 1, wherein the activation portion further comprises:
compressible paddles disposed within the compressible basket and connected to the drive shaft;
the starting pipe is sleeved outside the compressible net basket and connected with one end, far away from the perfusion part, of the outer sheath pipe.
3. The perfusion system of claim 1, wherein the material of the compressible basket is a shape memory alloy.
4. The perfusion system of claim 1, wherein the transmission assembly further comprises:
the inner sheath pipe is sleeved outside the transmission shaft, is at least partially positioned in the outer sheath pipe and is connected with one end of the basket pipe, which is far away from the compressible basket; and
the bearing sleeve is sleeved outside the transmission shaft and arranged in the basket pipe, and a first bearing and a second bearing are arranged at two ends of the bearing sleeve respectively.
5. The perfusion system of claim 4, wherein the basket tube defines a through-hole that selectively opens or closes when the basket tube moves relative to the sheath tube such that the first perfusion channel is selectively in communication with or disconnected from the second perfusion channel.
6. The perfusion system of claim 5, wherein the number of the through holes is plural, and the plural through holes are distributed along an axial direction of the basket tube and/or a circumferential direction of the basket tube.
7. The perfusion system of claim 5, wherein the inner sheath has a first gap with the drive shaft; a second gap is formed between the bearing sleeve and the transmission shaft, and the first gap is communicated with the second gap in a fluid mode to form the first pouring channel; a third gap is arranged between the outer sheath tube and the inner sheath tube, a fourth gap is arranged between the outer sheath tube and the basket tube, and the third gap is communicated with the fourth gap in a fluid mode to form the second perfusion channel.
8. The perfusion system of claim 5,
when the compressible basket is compressed into the outer sheath tube, the basket tube moves towards the direction close to the starting part relative to the bearing sleeve, the through hole is closed by the bearing sleeve, and the first perfusion channel is disconnected from the second perfusion channel;
when the compressible basket extends out of the outer sheath tube, the basket tube slides relative to the bearing sleeve towards the direction far away from the starting part, the through hole is opened, and the first perfusion channel is communicated with the second perfusion channel.
9. The perfusion system according to claim 8, wherein the inner wall of the basket pipe is provided with a protrusion, the outer wall of the bearing sleeve is provided with a limiting groove, and the protrusion is slidably matched with the limiting groove to limit the axial movement range of the basket pipe.
10. The perfusion system according to any one of claims 1-9, wherein the drive assembly further comprises a sealing ring that is fitted over an end of the drive shaft proximate the activation portion to seal off an end of the first perfusion channel proximate the activation portion.
11. The irrigation system as recited in any one of claims 4-9, wherein the irrigation portion comprises a rotational lock positioned at an end of the outer sheath distal from the activation portion and disposed outside the inner sheath, the rotational lock configured to lock the outer sheath to the inner sheath.
12. The perfusion system according to any one of claims 1-9, wherein the perfusion opening is provided with a first catheter, and a three-way valve is connected to an end of the first catheter remote from the perfusion portion.
13. An infusion system according to any of claims 1-9, wherein the return port is provided with a second catheter, the end of which remote from the return portion is connected to a negative pressure suction device.
14. The perfusion system according to any one of claims 1-9, wherein the inner wall of the sheath is grooved, the grooves extending in the same direction as the axial direction of the sheath.
15. The perfusion system of claim 14, wherein the groove is a square groove or an arc groove.
16. A transcutaneous blood pump comprising a perfusion system as claimed in any of claims 1 to 15.
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| CN112704811A (en) * | 2020-12-22 | 2021-04-27 | 上海微创医疗器械（集团）有限公司 | Perfusion device and blood pump comprising same |
| CN112791305A (en) * | 2021-01-22 | 2021-05-14 | 苏州心擎医疗技术有限公司 | Blood pump and power transmission assembly thereof |
| CN116059526A (en) * | 2021-11-03 | 2023-05-05 | 上海心恒睿医疗科技有限公司 | Perfusion cleaning device and percutaneous blood pumping device |
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