CN112704811A - Perfusion device and blood pump comprising same - Google Patents
Perfusion device and blood pump comprising same Download PDFInfo
- Publication number
- CN112704811A CN112704811A CN202011529689.9A CN202011529689A CN112704811A CN 112704811 A CN112704811 A CN 112704811A CN 202011529689 A CN202011529689 A CN 202011529689A CN 112704811 A CN112704811 A CN 112704811A
- Authority
- CN
- China
- Prior art keywords
- cavity
- perfusion
- blood
- perfusion device
- transmission
- 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
Links
- 230000010412 perfusion Effects 0.000 title claims abstract description 77
- 239000008280 blood Substances 0.000 title claims abstract description 49
- 210000004369 blood Anatomy 0.000 title claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000001802 infusion Methods 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 208000007536 Thrombosis Diseases 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 210000002489 tectorial membrane Anatomy 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 210000002376 aorta thoracic Anatomy 0.000 claims description 3
- 230000036772 blood pressure Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 3
- 206010018910 Haemolysis Diseases 0.000 abstract description 6
- 230000008588 hemolysis Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 5
- 206010040047 Sepsis Diseases 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- 230000002572 peristaltic effect Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000002504 physiological saline solution Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 206010007625 cardiogenic shock Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical compound FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001765 aortic valve Anatomy 0.000 description 1
- 230000006793 arrhythmia Effects 0.000 description 1
- 206010003119 arrhythmia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 210000003709 heart valve Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Abstract
The invention relates to a perfusion device and a blood pump comprising the perfusion device, wherein the perfusion device comprises an inner pipe fitting, the inner pipe fitting is provided with a first cavity and at least one second cavity distributed around the first cavity, the second cavity is used for connecting a transfusion part, the first cavity is used for connecting a liquid outlet part, the first cavity and the second cavity are communicated to form a passage for dividing fluid flowing into the perfusion device into at least two parts, one part of the fluid flows out of the second cavity and is introduced into a patient, and the other part of the fluid flows back to the first cavity and is led out of the liquid outlet part for being recovered outside the patient. The blood pump includes a perfusion unit, a pump head unit, a driver and a power output unit. The invention can reduce the hemolysis phenomenon generated by the high-speed rotation of the transmission flexible shaft at the bearing by using the perfusion device, reduces the quantity of particles generated by the friction between the inner pipe fitting and the transmission flexible shaft entering the blood, reduces the pollution of the blood of a patient caused by the particles brought into the blood, and reduces the risk of blood poisoning.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a perfusion device and a blood pump comprising the perfusion device.
Background
Short-term trans-valvular blood pumps are mainly used for emergency treatment of cardiogenic shock and auxiliary circulation during high-risk PCI surgery. The short-term valve-crossing blood pump is placed on an aortic valve and can provide flow support of up to 4L/min, so that the blood pumping function of the heart is replaced, the life of a patient suffering from cardiogenic shock can be saved, or the heart state is stabilized during the operation of a high-risk PCI patient, the occurrence of arrhythmia is reduced, the operation risk is reduced, and the success rate of the high-risk PCI operation is ensured.
The transvalvular blood pump needs a perfusion system to lubricate and wash the bearing and the transmission flexible shaft, so as to avoid hemolysis and thrombus. However, the conventional perfusion system brings particles generated when the transmission flexible shaft rotates into blood, so that the blood of a patient is polluted, and thrombus and blood poisoning are easily generated. Meanwhile, because of the precise structure and the high rotating speed reaching thousands of revolutions, if the dynamic seal is arranged at the far end of the perfusion system to prevent perfusion liquid from entering the body of a patient, the dynamic seal is easy to abrade, and meanwhile, high temperature caused by sealing friction is generated at the dynamic seal, so that hemolysis and thrombus are generated.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a perfusion device and a blood pump comprising the same, which solve one or more problems of the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the infusion device comprises an inner pipe, wherein a first cavity and at least one second cavity distributed around the first cavity are formed in the inner pipe, the second cavity is used for being connected with an infusion part, the first cavity is used for being connected with a liquid outlet part, the first cavity and the second cavity are communicated to form a passage, so that fluid flowing into the infusion device is divided into at least two parts, one part of the fluid flows out of the second cavity and is introduced into a patient, and the other part of the fluid flows back to the first cavity and is led out of the liquid outlet part to be recycled outside the patient.
Further, the second chamber the outside of the inner tube has a side hole communicating with the second chamber for introducing fluid into the second chamber through the side hole.
Further, the second lumen is open or closed at the proximal end of the inner tubular member.
Further, the perfusion device further comprises an outer tube, the outer side of the inner tube being covered by the outer tube.
Furthermore, the perfusion device further comprises a fastening device, the fastening device is arranged on the outer pipe element, the outer pipe element and the inner pipe element are relatively fixed through the fastening device, and the fastening device is further provided with at least one joint for sucking thrombus or injecting fluid.
Further, the perfusion device further comprises a handle, the handle is provided with an infusion port and a liquid discharge port, and the far end of the handle is connected with the near end of the inner pipe fitting so as to enable the infusion port, the second cavity, the first cavity and the liquid discharge port to be communicated to form a circulation loop.
Further, the perfusion device further comprises a pressure control system, the pressure control system is provided with a transfusion part connected with the transfusion port and a liquid discharge part connected with the liquid discharge port, the transfusion part is provided with a power input mechanism for providing power for the perfusion device, and the liquid discharge part is provided with a regulating mechanism for controlling the flow entering the perfusion device so that the fluid pressure is greater than the blood pressure in the heart.
The blood pump comprises a perfusion device, a pump head device, a transmission device and a power output device, wherein the pump head device is arranged at the far end of the transmission device, the perfusion device wraps the transmission device, the near end of the transmission device is connected with the power output device, so that the transmission device is driven to the pump head device by providing power through the power output device, and the pump head device rotates.
Further, the pump head device is used for interveneeing the heart, the pump head device includes an at least paddle, tectorial membrane basket and plug, the paddle set up in the distal end of plug, tectorial membrane basket cover in the outside of paddle, tectorial membrane basket comprises expansible part and non-expansible part.
Furthermore, the transmission device comprises a bearing assembly, a transmission flexible shaft and a passive magnetic steel assembly, the near end of the core rod penetrates through the bearing assembly and is connected with the far end of the transmission flexible shaft, and the passive magnetic steel assembly is arranged at the near end of the transmission flexible shaft.
Further, the bearing assembly comprises a bearing sleeve and at least one bearing matched with the bearing sleeve, and the bearing is used for being matched with the core rod.
Further, the flexible transmission shaft is formed by weaving a plurality of filaments, so that the flexible transmission shaft has flexibility through the filaments and is used for passing through the bending area of the aortic arch and transmitting power to the mandrel.
Compared with the prior art, the invention has the following beneficial technical effects:
the perfusion device is arranged to enable fluid to form a plurality of branches, one branch can flow back and infiltrate the transmission flexible shaft and discharge polluted fluid out of the body of a patient through the liquid outlet and enter the waste liquid bag, and the other branch can lubricate the bearing assembly and enter the body of the patient.
Further, the pressure control system can prevent blood in the body from flowing backwards from the gap between the core rod and the second bearing due to pressure and entering the perfusion device, and can prevent blood from being subjected to hemolysis and thrombosis under the liquid environment with high temperature and high rotating speed when the blood passes through the gap, so that the fluid can flow through the third hole from the gap between the second bearing and the core rod, flow through the gap between the first bearing and the core rod and enter the body of a patient, and the flow rate is always kept at a low flow rate.
Furthermore, the invention can calculate the pressure value of the outlet position of the blood pump without implanting a pressure gauge in the body, and can control the fluid pressure to avoid generating additional injury to human tissues.
Drawings
Fig. 1 shows a schematic structural diagram of a perfusion device and a blood pump comprising the perfusion device according to an embodiment of the invention.
Fig. 2 shows a schematic structural diagram of an expansible portion in a perfusion device and a blood pump incorporating the device according to an embodiment of the present invention.
Fig. 3 shows a schematic diagram of a perfusion device and a transmission part in a blood pump comprising the perfusion device according to an embodiment of the invention.
Fig. 4 shows a schematic sectional structure view of a transmission part in the direction A-A in the perfusion device and the blood pump comprising the perfusion device.
Fig. 5 shows a schematic structural diagram of a perfusion device and a bearing assembly in a blood pump comprising the perfusion device according to an embodiment of the invention.
Fig. 6 shows a schematic diagram of a perfusion device and a perfusion structure in a blood pump comprising the perfusion device according to an embodiment of the invention.
Fig. 7 shows a front view of a perfusion device and an inner catheter in a blood pump incorporating the device according to an embodiment of the present invention.
FIG. 8 shows an isometric view of an infusion device and an inner catheter in a blood pump incorporating the device in accordance with an embodiment of the present invention;
fig. 9 shows a cross-sectional structural diagram of an inner catheter in a B-B direction in the perfusion device and the blood pump comprising the perfusion device according to the embodiment of the invention.
Fig. 10 shows a schematic flow diagram of a perfusion structure and liquid in a perfusion device and a blood pump including the perfusion device according to an embodiment of the invention.
Fig. 11 shows a schematic structural diagram of a perfusion device and a pressure control system in a blood pump comprising the perfusion device according to an embodiment of the invention.
In the drawings, the reference numbers: 10. a pump head device; 11. a paddle; 12. a film-covered net basket; 121. a non-expandable portion; 122. an expansible portion; 13. a core rod; 20. a transmission device; 21. a bearing assembly; 211. a bearing housing; 2111. a first hole; 2112. a second hole; 2113. a third aperture; 221. a first bearing; 222. a second bearing; 23. a flexible transmission shaft; 24. a passive magnetic steel component; 30. a perfusion device; 301. an outer tubular member; 3011. screwing; 3012. a joint; 3013. screwing the cap; 302. an inner tube; 3021. a first chamber; 3022. a second chamber; 3023. a side hole; 3025. a blocking member; 31. a metal sheath; 32. a handle; 321. an infusion port; 322. a liquid discharge port; 40. a power take-off; 50. a pressure control system; 501. an infusion bag; 502. a waste liquid bag; 503. a liquid discharge pipe; 504. a pressure regulator; 505. a peristaltic pump; 506. an infusion tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the perfusion device and the blood pump including the perfusion device according to the present invention are further described in detail below with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
As used in this specification and the appended claims, the term "proximal" is generally the end near the operator, and the term "distal" is generally the end near the lesion of the patient, as exemplified in fig. 1, with the right side of fig. 1 being proximal and the left side of fig. 1 being distal.
Referring to fig. 1, the present invention relates generally to a trans-valve blood pump, which includes a pump head device 10, a transmission device 20, an infusion device 30 and a power output device 40, wherein the pump head device 10 has a portion (described in detail below in the structure of the pump head device 10) for sucking blood and is disposed at a distal end of the transmission device 20, the infusion device 30 wraps and lubricates the transmission device 20, and a proximal end of the transmission device 20 is connected to the power output device 40 to provide power through the power output device 40 and drive the transmission device 20 to the pump head device 10, so as to achieve high-speed rotation of the pump head device 10.
The specific construction of the pump head assembly 10 is described in detail below:
referring to fig. 2, the pump head assembly 10 is introduced into the heart by an invasive procedure, which allows for greater flow at relatively low rotational speeds. The pump head device 10 comprises a paddle 11, a film-covered basket 12 and a core rod 13, the paddle 11 is arranged at the distal end of the core rod 13, the film-covered basket 12 covers the outer side of the paddle 11, and the film-covered basket 12 is composed of an expandable part 122 and a non-expandable part 121, wherein the expandable part 122 is positioned at a heart valve in a working state and sucks blood through the paddle 11.
The specific structure of the transmission 20 is described below:
referring to fig. 3, 4 and 5, the transmission device 20 includes a bearing assembly 21, a flexible transmission shaft 23 and a passive magnetic steel assembly 24, the proximal end of the core rod 13 penetrates through the bearing assembly 21 and is connected to the distal end of the flexible transmission shaft 23, and the passive magnetic steel assembly 24 is disposed at the proximal end of the flexible transmission shaft 23.
Further, with continued reference to fig. 3, 4 and 5, the bearing assembly 21 includes a bearing housing 211 and at least one bearing engaged with the bearing housing 211, preferably, a first hole 2111 is opened at a distal end of the bearing housing 211, and a second hole 2112 is opened at a proximal end of the bearing housing 211, in this embodiment, the bearing is a first bearing 221 disposed in the first hole 2111 and a second bearing 222 disposed in the second hole 2112, the bearing housing 211 further has a third hole 2113 communicating with the first hole 2111 and the second hole 2112, the third hole 2113 is used for passing a mandrel 13, the hole diameter of the third hole 2113 is larger than the diameter of the mandrel 13, and the central holes of the first bearing 221 and the second bearing 222 are in clearance fit with the mandrel 13, preferably, the first hole 2111, the second hole 2112 and the third hole 2113 are in communication with each other.
Further, with continued reference to fig. 3, 4 and 5, the first bearing 221 and the second bearing 222 are preferably sliding bearings, and the bearing housing 211 may be made of wear-resistant materials to improve the service life of the bearing housing 211.
Further, with continued reference to fig. 3, 4 and 5, the flexible drive shaft 23 is constructed of a stainless steel filament weave that imparts flexibility to the flexible drive shaft for passing through the curved region of the aortic arch and transmitting power to the core 13 and the paddles 11 at the distal end of the core 13.
Further, the active magnetic steel components (not shown) that above-mentioned passive magnetic steel components 24 and power take-off 40 have are rotor magnetic steel, wherein passive magnetic steel components 24 and active magnetic steel components are coaxial to be set up, the active magnetic steel components receives power take-off 40 control and drives passive magnetic steel components 24 synchronous rotation, passive magnetic steel components 24 synchronous rotation and with power transmission to transmission flexible axle 23, for the transmission flexible axle 23 rotates.
The specific structure of the perfusion apparatus 30 is described below:
referring to fig. 6, 7, 8 and 9, in order to prevent the blood from flowing backward into the blood pump to cause hemolysis and thrombosis, the present invention provides a perfusion device 30, so as to lubricate and flush the bearing assembly 21 and the flexible transmission shaft 23 through the perfusion device 30, and simultaneously recover the perfused waste liquid.
Specifically, with continued reference to fig. 6, 7, 8 and 9, the infusion set 30 includes an inner tube 302, a first cavity 3021 and at least one second cavity 3022 distributed around the first cavity 3021 are formed on the inner tube 302, the second cavity 3022 is used for connecting an infusion part, the first cavity 3021 is used for connecting an outflow part, the first cavity 3021 and the second cavity 3022 are communicated to form a passage, so that the fluid flowing into the infusion set 30 is divided into at least two parts, wherein one part of the fluid flows out of the second cavity 3022 and is introduced into the patient, and the other part of the fluid flows back to the first cavity 3021 and is led out to the outflow part for recycling outside the patient.
The specific structure of the inner tube 302 is described in detail below:
referring to fig. 7, 8 and 9, the inner tube 302, through the first chamber 3021, encloses the flexible drive shaft 23 without limiting its rotation, and fluid may pass through the first chamber 3021 and lubricate the flexible drive shaft to reduce wear. Preferably, the first cavity 3021 is axially disposed through the axis of the inner tube 302, the number of the second cavities 3022 is preferably 3 to 6 in this embodiment, and the second cavities 3021 and 3021 are circumferentially disposed around the first cavity 3021, and the first cavity 3021 and the second cavity 3022 are independent of each other.
Referring to fig. 7, 8 and 9, in order to communicate the second chamber 3022 with the interior of the handle 32, the second chamber 3022 has a side hole 3023 near the outside of the inner tube 302, the side hole 3023 communicates with the second chamber 3022, so that the fluid flowing through the handle is introduced into the second chamber 3022 through the side hole 3023, and preferably, the second chamber 3022 is closed near the proximal end of the inner tube 302, so that the fluid flows out to the distal end of the inner tube 302.
Further, referring to fig. 10, in order to avoid fluid leakage at the distal end of the inner tube 302 and better enter the bearing assembly 21, the distal end of the inner tube 302 is hermetically connected to the proximal end of the membrane-covered basket 12, and the hermetic connection preferably employs a metal sleeve 31, wherein the distal end of the metal sleeve 31 is sleeved on the outer side of the non-expandable portion 121 of the membrane-covered basket 12, and the proximal end of the metal sleeve 31 is sleeved on the distal end of the inner tube 302.
Further, the inner tubular member 302 is made of a wear resistant material such as PTFE (polytetrafluoroethylene), FEP (perfluoroethylene propylene copolymer) to reduce the wear rate.
Of course, in other embodiments of the present invention, the second cavity 3022 may be unevenly distributed around the first cavity 3021, and the first cavity 3021 may be eccentrically disposed on the inner tube 302. The proximal end of the inner tubular member 302 may also be in communication with the second lumen 3022, but may be blocked by a blocking member 3025 near the proximal end of the inner tubular member 302, allowing fluid to flow only from the distal end of the inner tubular member 302. The plugging device may be made of glue, and the proximal end of the inner tube 302 may be plugged after the glue is solidified into a solid, or other structures may be used for plugging in other embodiments of the present invention as long as the proximal end of the inner tube 302 is plugged so that the fluid flows out only from the distal end of the inner tube 302.
The specific structure of the outer tube 301 is described in detail below:
referring to FIG. 6, the outer tube 301 is wrapped around the outer tube 302 and is used to collapse the expandable portion 122 of the membrane basket 12 in the pump head 10. Wherein a fastening device is further arranged at the proximal end of the outer tube element 301, the outer tube element 301 and the inner tube element 302 are fixed relatively by the fastening device, and the fastening device is provided with at least one joint 3012 for sucking thrombus and injecting physiological saline.
Further, with continued reference to fig. 6, the connector 3012 is preferably a luer connector for connecting the infusion bag 501 or a syringe, so as to periodically withdraw thrombus formed in the gap between the inner tube 302 and the outer tube 301 therefrom and inject physiological saline into the gap. The fastening device comprises a rotary lock 3011 and a rotary cap 3013 which can be connected with each other by screw threads, after the rotary cap 3013 is screwed, the outer pipe 301 and the inner pipe 302 close to the rotary lock 3011 and the rotary cap 3013 are fixed relatively and have no gap therebetween, thus avoiding the leakage of physiological saline and blood from gaps, the gap does not only mean that no gap exists between the outer pipe 301 and the inner pipe 302 in the screwed area after the rotary lock 3011 and the rotary cap 3013 are screwed, and the gap exists between the outer pipe 301 and the inner pipe 302 in the area except the gap, so that thrombus can be sucked by the joint 3012 and lifting saline can be introduced.
Further, with continued reference to fig. 10, the perfusion apparatus 30 further includes a handle 32, the handle 32 has an infusion port 321 and a liquid discharge port 322, a distal end of the handle 32 is connected to the proximal end of the inner tube 302, and the proximal end of the handle 32 is used for mounting the passive magnetic steel assembly 24, so that the infusion port 321, the second cavity 3022, the first cavity 3021 and the liquid discharge port 322 are communicated to form a circulation loop.
Specifically, with continued reference to FIG. 10, in this embodiment, after the proximal end of the inner tube 302 is assembled to the distal end of the handle 32, the side hole 3023 near the proximal end of the inner tube 302 communicates with the infusion port 321.
The inner tubular member 302 of FIG. 10 is abbreviated for clarity, with the actual length of the inner tubular member 302 being longer than that seen in FIG. 10.
The flow direction of the fluid, i.e. the lubricating liquid, at the pouring device 30 is described below:
with continued reference to fig. 10, the fluid flows from the infusion port 321 and is introduced into the second cavity 3022 through the side hole 3023, and after the fluid flows out of the inner tube 302 as shown by the arrow, two branches are formed inside the metal sheath 31, wherein one branch flows back to the first cavity 3021 of the inner tube 302 as shown by the arrow and lubricates the flexible transmission shaft 23, because the flexible transmission shaft 23 penetrates through the inner tube 302 of the inner tube 302, and the flexible transmission shaft 23 is formed by weaving a plurality of stainless steel filaments, the fluid can flow through the gaps between the different filaments, so that each filament can be soaked by the fluid, and finally, the fluid can discharge the particles generated by abrasion when the flexible transmission shaft 23 rotates through the liquid discharge port 322. The other branch passes through the third bore 2113 through the gap between the second bearing 222 and the mandrel 13, then through the gap between the first bearing 221 and the mandrel 13 and into the patient to effect lubrication of the bearing assembly 21.
Although the fluid is divided into two paths by the perfusion device 30, in order to avoid the pressure of the blood in the body flowing back from the gap between the core rod 13 and the second bearing 222 into the perfusion device 30 and the problems of hemolysis and thrombosis of the blood under the liquid environment of high temperature and high rotating speed when the blood passes through the gap, the invention also provides a pressure control system 50, wherein the pressure control system 50 can make the pressure of the fluid at the liquid discharge port 322 be larger than the pressure of the blood sucked at the pump head device 10, ensure that the fluid can flow from the gap between the second bearing 222 and the core rod 13, pass through the third hole 2113 and the gap between the first bearing 221 and the core rod 13 and enter the patient, and keep the flow rate at a lower flow rate all the time.
The specific structure of the pressure control system 50 is as follows:
referring to fig. 11, the pressure control system 50 has an infusion part connected to the infusion port 321 and a drainage part connected to the drainage port 322, the infusion part having a power input mechanism for providing power to the perfusion apparatus 30, the drainage part having an adjustment mechanism for controlling the liquid pressure in the line so that the fluid pressure at the gap between the first bearing 221 and the core rod 13 is greater than the intracardiac blood pressure.
Further, with reference to fig. 11, the infusion part specifically refers to an infusion tube 506 connected to the infusion port 321, the infusion tube 506 is connected to the infusion bag 501, fluid of the infusion bag 501, i.e., lubricating fluid, can enter the handle 32 through the infusion tube 506, and provides power for the perfusion device 30 under the action of the power input mechanism. The power input mechanism may be a syringe pump, peristaltic pump, or the like. In this embodiment, the power input mechanism is a peristaltic pump 505 mounted on the infusion tube 506, the peristaltic pump 505 is a constant flow pump, and the total amount of fluid entering the perfusion apparatus 30 can be controlled by adjusting the flow rate of the peristaltic pump 505. The drainage part is specifically a drainage pipe 503 connected with the drainage port 322, the drainage pipe 503 is connected with a waste liquid bag 502, and the waste liquid bag 502 is used for collecting the returned and polluted (particle-containing) fluid. The regulating mechanism is in particular a pressure regulator 504 connected to the drain 503 for regulating the fluid pressure. In this embodiment, the pressure regulator 504 controls the pressure of the fluid in the perfusion apparatus 30 by adjusting the size of the cross-section of the drain 503. In the case of a constant flow rate of the perfusion apparatus 30, the smaller the cross-sectional area of the drain 503, the higher the fluid pressure.
Further, since there is a correlation between the pressure of the fluid in the gap between the second bearing 222 and the mandrel 13 and the pressure of the fluid in the pressure regulator 504, a pressure sensor may be disposed on the pressure regulator 504 for testing the fluid pressure data for estimation, and the pressure of the pressure regulator 504 may be adjusted according to the estimation result to ensure that the pressure of the fluid is greater than the pressure of the blood in the heart, so as to avoid the backward flow of the blood.
In other embodiments of the present invention, the infusion bag 501 may be other containers, such as a bottle, a box, etc., as long as it can store liquid. The pressure regulator 504 may also be a throttle valve integrated into the drain 503, provided that it is sufficient to control the pressure of the fluid in the perfusion apparatus 30.
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 (12)
1. Perfusion device, its characterized in that: the perfusion device comprises an inner pipe fitting, wherein a first cavity and at least one second cavity distributed around the first cavity are formed in the inner pipe fitting, the second cavity is connected with a transfusion part, the first cavity is connected with a liquid outlet part, the first cavity and the second cavity are communicated to form a passage for dividing fluid flowing into the perfusion device into at least two parts, one part of the fluid flows out of the second cavity and is introduced into the body of a patient, and the other part of the fluid flows back to the first cavity and is introduced to the liquid outlet part for recycling outside the body of the patient.
2. The perfusion apparatus of claim 1, wherein: the outer side of the inner tube has a side hole in communication with the second chamber for introducing fluid into the second chamber through the side hole.
3. The perfusion apparatus of claim 1, wherein: the second lumen is open or closed at the proximal end of the inner tubular member.
4. The perfusion apparatus of claim 1, wherein: the perfusion device further comprises an outer pipe, and the outer pipe is sleeved on the inner pipe.
5. The perfusion apparatus of claim 4, wherein: the perfusion device also comprises a fastening device, the fastening device is arranged on the outer pipe element, the outer pipe element and the inner pipe element are relatively fixed through the fastening device, and the fastening device is also provided with at least one joint for sucking thrombus or injecting fluid.
6. The perfusion apparatus of claim 1, wherein: the perfusion device further comprises a handle, wherein the handle is provided with an infusion port and a liquid outlet, and the far end of the handle is connected with the near end of the inner pipe fitting so as to enable the infusion port, the second cavity, the first cavity and the liquid outlet to be communicated to form a circulation loop.
7. The perfusion apparatus of claim 6, wherein: the perfusion device further comprises a pressure control system, wherein the pressure control system is provided with a transfusion part connected with the transfusion port and a liquid discharging part connected with the liquid discharging port, the transfusion part is provided with a power input mechanism for providing power for the perfusion device, and the liquid discharging part is provided with a regulating mechanism for controlling the flow entering the perfusion device so as to enable the fluid pressure to be larger than the blood pressure in the heart.
8. A blood pump, characterized in that: the pump head device comprises the perfusion device as claimed in any one of claims 1 to 7, a pump head device, a transmission device, and a power output device, wherein the pump head device is arranged at a distal end of the transmission device, the perfusion device covers the transmission device, and a proximal end of the transmission device is connected with the power output device, so that power is provided through the power output device and drives the transmission device to transmit to the pump head device, so as to realize rotation of part of the pump head device.
9. The blood pump of claim 8, wherein: the pump head device is used for interveneeing the heart, the pump head device includes an at least paddle, tectorial membrane basket and plug, the paddle set up in the distal end of plug, tectorial membrane basket cover in the outside of paddle, tectorial membrane basket comprises expansible part and non-expansible part.
10. The blood pump of claim 9, wherein: the transmission device comprises a bearing assembly, a transmission flexible shaft and a passive magnetic steel assembly, the near end of the core rod penetrates through the bearing assembly and is connected with the far end of the transmission flexible shaft, and the passive magnetic steel assembly is arranged at the near end of the transmission flexible shaft.
11. The blood pump of claim 10, wherein: the bearing assembly comprises a bearing sleeve and at least one bearing matched with the bearing sleeve, and the bearing is used for being matched with the core rod.
12. The blood pump of claim 10, wherein: the flexible transmission shaft is formed by weaving a plurality of filaments, so that the flexible transmission shaft has flexibility through the filaments and is used for passing through a bending area of an aortic arch and transmitting power to the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529689.9A CN112704811A (en) | 2020-12-22 | 2020-12-22 | Perfusion device and blood pump comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529689.9A CN112704811A (en) | 2020-12-22 | 2020-12-22 | Perfusion device and blood pump comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112704811A true CN112704811A (en) | 2021-04-27 |
Family
ID=75545232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011529689.9A Pending CN112704811A (en) | 2020-12-22 | 2020-12-22 | Perfusion device and blood pump comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112704811A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430038A (en) * | 2021-07-12 | 2022-12-06 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065924A (en) * | 2008-06-23 | 2011-05-18 | 卡迪奥布里奇有限公司 | Catheter pump for circulatory support |
| US20120172656A1 (en) * | 2011-01-05 | 2012-07-05 | Walters Daniel A | Percutaneous heart pump |
| CN206443963U (en) * | 2016-10-09 | 2017-08-29 | 丰凯医疗器械（上海）有限公司 | Flexible transmission system, percutaneous auxiliary blood pumping device and Intravascular Thrombus suction system |
| US20180177931A1 (en) * | 2015-04-16 | 2018-06-28 | Tc1 Llc | Catheter pump with positioning brace |
| CN109432572A (en) * | 2018-10-16 | 2019-03-08 | 昕涌医疗器械(上海)有限公司 | A kind of rotary drive interposing catheter having perfusion functional |
| CN109512481A (en) * | 2018-12-19 | 2019-03-26 | 首都医科大学附属北京安贞医院 | It is a kind of for treating the occlusion catheter and application method of coronary arterial perforation |
| CN109821140A (en) * | 2019-03-13 | 2019-05-31 | 昕涌医疗器械(上海)有限公司 | The multi-lumen tube of aperture on a kind of partition wall for Flexible Transmission |
| CN111202877A (en) * | 2018-11-22 | 2020-05-29 | 上海微创医疗器械（集团）有限公司 | Percutaneous blood pump and perfusion system thereof |
-
2020
- 2020-12-22 CN CN202011529689.9A patent/CN112704811A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065924A (en) * | 2008-06-23 | 2011-05-18 | 卡迪奥布里奇有限公司 | Catheter pump for circulatory support |
| US20120172656A1 (en) * | 2011-01-05 | 2012-07-05 | Walters Daniel A | Percutaneous heart pump |
| US20180177931A1 (en) * | 2015-04-16 | 2018-06-28 | Tc1 Llc | Catheter pump with positioning brace |
| CN206443963U (en) * | 2016-10-09 | 2017-08-29 | 丰凯医疗器械（上海）有限公司 | Flexible transmission system, percutaneous auxiliary blood pumping device and Intravascular Thrombus suction system |
| CN109432572A (en) * | 2018-10-16 | 2019-03-08 | 昕涌医疗器械(上海)有限公司 | A kind of rotary drive interposing catheter having perfusion functional |
| CN111202877A (en) * | 2018-11-22 | 2020-05-29 | 上海微创医疗器械（集团）有限公司 | Percutaneous blood pump and perfusion system thereof |
| CN109512481A (en) * | 2018-12-19 | 2019-03-26 | 首都医科大学附属北京安贞医院 | It is a kind of for treating the occlusion catheter and application method of coronary arterial perforation |
| CN109821140A (en) * | 2019-03-13 | 2019-05-31 | 昕涌医疗器械(上海)有限公司 | The multi-lumen tube of aperture on a kind of partition wall for Flexible Transmission |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430038A (en) * | 2021-07-12 | 2022-12-06 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11123539B2 (en) | Catheter device | |
| AU678411B2 (en) | Cannula pumps for temporary cardiac support | |
| CA1240802A (en) | High-capacity intravascular blood pump utilizing percutaneous access | |
| CN112891732B (en) | Perfusate conveying device and control method thereof | |
| CA3045168C (en) | Catheter device | |
| KR20210121302A (en) | Method for operating a supply device that supplies a channel with a liquid, and supply device, hollow catheter and catheter pump | |
| CA3178216A1 (en) | Catheter device | |
| CN112107749B (en) | Flow guiding device and catheter pump | |
| CN109821140A (en) | The multi-lumen tube of aperture on a kind of partition wall for Flexible Transmission | |
| CN114215792B (en) | Micropump with totally-enclosed cleaning fluid circulation system | |
| IL302716A (en) | Systems and methods for minimizing leaks during insertion of pumps | |
| CN110917420B (en) | Flexible shaft structure for isolating and discharging wear particles through pouring | |
| CN110478547B (en) | Flexible shaft structure for isolating wear particles through perfusion | |
| CN112704811A (en) | Perfusion device and blood pump comprising same | |
| CN110290826B (en) | Flushing system | |
| CN209221277U (en) | The rotary drive interposing catheter for having perfusion functional | |
| CN111202877B (en) | Percutaneous blood pump and perfusion system thereof | |
| CN109432572A (en) | A kind of rotary drive interposing catheter having perfusion functional | |
| CN116059526A (en) | Perfusion cleaning device and percutaneous blood pumping device | |
| CN116966415A (en) | Ventricular assist device | |
| CN211132644U (en) | Multi-cavity tube with opening on partition wall for flexible transmission | |
| CN218833390U (en) | Ventricular assist device | |
| CN219355088U (en) | Blood vessel wall supporting type aortic blood pumping device | |
| CN117717705B (en) | Interventional catheter pump capable of realizing non-perfusion sealing | |
| CN117815533A (en) | Perfusate injection device and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211130 Address after: Room 102, Zone C, No. 1601 Zhangdong Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 201203 Applicant after: CARDIOPOWER MEDTECH (SHANGHAI) Co.,Ltd. Address before: 201203, 501, Newton Road, Zhangjiang hi tech park, Shanghai, Pudong New Area Applicant before: SHANGHAI MICROPORT MEDICAL (GROUP) Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231016 Address after: Room 202, 2nd Floor, Zone A, Building 1, No. 1601 Zhangdong Road, China (Shanghai) Pilot Free Trade Zone, Pudong New Area, Shanghai, March 2012 (nominal floor 2, actual floor 3) Applicant after: Minimally Invasive Xindao (Shanghai) Medical Technology Co.,Ltd. Address before: Room 102, Zone C, No. 1601 Zhangdong Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 201203 Applicant before: CARDIOPOWER MEDTECH (SHANGHAI) Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231207 Address after: Room 505, 5th Floor, Block B, Building 11, No. 1661 Zhangdong Road, China (Shanghai) Pilot Free Trade Zone, Pudong New Area, Shanghai, March 2012 Applicant after: Minimally invasive Investment Holdings Ltd. Address before: Room 202, 2nd Floor, Zone A, Building 1, No. 1601 Zhangdong Road, China (Shanghai) Pilot Free Trade Zone, Pudong New Area, Shanghai, March 2012 (nominal floor 2, actual floor 3) Applicant before: Minimally Invasive Xindao (Shanghai) Medical Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right |