CN118161690A - ECMO system with dual lumen arterial cannula - Google Patents
ECMO system with dual lumen arterial cannula Download PDFInfo
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- CN118161690A CN118161690A CN202410580317.0A CN202410580317A CN118161690A CN 118161690 A CN118161690 A CN 118161690A CN 202410580317 A CN202410580317 A CN 202410580317A CN 118161690 A CN118161690 A CN 118161690A
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- 238000002618 extracorporeal membrane oxygenation Methods 0.000 title claims abstract description 31
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- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The invention relates to an ECMO system with a double-cavity arterial cannula, which comprises a double-cavity arterial cannula, a venous cannula, a connecting pipeline, a driving pump and an oxygenator, wherein the double-cavity arterial cannula comprises a cannula main body, the cannula main body is provided with a first backflow cavity and a second backflow cavity, the first backflow cavity is provided with a first inlet end and a first outlet end, the second backflow cavity is provided with a second inlet end and a second outlet end, the first inlet end and the second inlet end extend out of a human body, the second outlet end is arranged between the first outlet end and the first inlet end, the first outlet end extends into an ascending aorta or an aortic arch, the second outlet end extends into a descending aorta, a drainage inlet of the venous cannula extends into a vein, one end of the connecting pipeline is communicated with the first inlet end and the second inlet end, the other end of the connecting pipeline is communicated with a drainage outlet of the venous cannula, and the driving pump and the oxygenator are connected in series on the connecting pipeline. The system can meet the requirement of limb perfusion, is not easy to generate thrombus, and has good use effect.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an ECMO system with a double-cavity arterial cannula.
Background
Mechanical Circulatory Support (MCS) has long been used for supporting therapy for Cardiogenic Shock (CS) patients, and as equipment and technology continue to advance, MCS applications are particularly prevalent, common MCSs include Impella, IABP, TANDEM HEART, VAD, ECMO, and the like. As one of the common means of circulatory support for CS patients, VA-ECMO has been increasingly used in recent years, and particularly in patients with cardiac surgery and cardiac arrest, VA-ECMO has become the most mainstream circulatory support means. In the related art, the arterial cannula in the VA-ECMO system is unreasonable in design, blood perfused by the artery cannot smoothly flow to the distal end of the limb, blood stasis and even thrombus are easy to occur, and the use effect is poor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides the ECMO system with the double-cavity arterial cannula, which can meet the requirement of limb perfusion, is not easy to generate thrombus and has good use effect.
An ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention comprises: the double-cavity arterial cannula comprises a cannula main body, wherein the cannula main body is provided with a first backflow cavity and a second backflow cavity which are mutually independent, the first backflow cavity and the second backflow cavity extend along the length direction of the cannula main body, the first backflow cavity is provided with a first inlet end and a first outlet end, the second backflow cavity is provided with a second inlet end and a second outlet end, the first inlet end is adjacent to the second inlet end, the second outlet end is arranged between the first outlet end and the first inlet end along the length direction of the cannula main body, the first outlet end is suitable for extending into the ascending aorta or the aortic arch of a human body, the second outlet end is suitable for extending into the descending aorta of the human body, and the first inlet end and the second inlet end are suitable for extending out of the human body; a venous cannula having a drainage inlet and a drainage outlet, the drainage inlet extending into a vein or right atrium; the connecting pipeline is arranged outside the human body, one end of the connecting pipeline is communicated with the first inlet end and the second inlet end, and the other end of the connecting pipeline is communicated with the drainage outlet; the driving pump and the oxygenator are connected in series on the connecting pipeline.
When the ECMO system works, venous blood can be introduced into the connecting pipeline through the venous cannula and is driven to the first inlet end and the second inlet end under the action of the driving pump, and the first outlet end is suitable for extending into the ascending aorta or the aortic arch, and the second outlet end is suitable for extending into the descending aorta, so that the blood oxygenated by the oxygenator can be driven into the ascending aorta or the aortic arch through the first outlet end and is driven into the descending aorta through the second outlet end, the blood which is driven into the aorta is dispersed, the blood flow velocity which is injected into the aorta is reduced, thrombus is avoided, and therefore, the ECMO system with the double-cavity arterial cannula provided by the embodiment of the invention can meet the requirement of limb perfusion, is not easy to generate thrombus, and has a good use effect.
In some embodiments, the first outlet end includes a first main return aperture disposed at an end of the cannula body along a length of the cannula body and a plurality of first side return apertures disposed adjacent the first main return aperture and the plurality of first side return apertures are circumferentially and axially spaced around the cannula body.
In some embodiments, the second outlet end is provided with at least two second backflow holes, at least two second backflow holes are all arranged at intervals along the length direction of the cannula main body, and the second backflow holes are all arranged on the same side of the cannula main body along the radial direction of the cannula main body.
In some embodiments, the second reflow hole includes a first hole and a second hole, the first hole is closer to the first outlet end than the second hole, and the first hole is disposed at an end of the second reflow chamber, an inner wall of the second reflow chamber has a guiding cambered surface, the guiding cambered surface is recessed toward a direction away from the first hole, the guiding cambered surface is connected with an outer edge of the first hole, and an outer peripheral contour of the second hole is circular or elliptical.
In some embodiments, the cross-sectional area of the cannula body is A1 and the cross-sectional area of the first flashback chamber is A2, 1.2.ltoreq.A2/A1.ltoreq.2.
In some embodiments, the double lumen arterial cannula further comprises a stiffener that is helical and wrapped around the outer wall of the cannula body.
In some embodiments, the outer wall of the cannula body comprises an inner layer and an outer layer, the first and second flashback chambers are located within the inner layer, and the stiffener is located between the inner layer and the outer layer.
In some embodiments, the cannula body is made of at least one of PVC, TPU and SUS 304; and/or the reinforcing rib is made of at least one of SUS304 and nickel titanium wires.
In some embodiments, an elastic membrane is disposed in the inner layer, the membrane divides the cavity of the inner layer into the first backflow cavity and the second backflow cavity, the thickness of the membrane is greater than or equal to 0.1mm and less than or equal to 0.2mm, and the wall thickness of the cannula body is greater than or equal to 0.2mm and less than or equal to 0.5mm.
In some embodiments, the dual-lumen arterial cannula further comprises a ferrule assembly comprising a ferrule and a ferrule seat, the ferrule is disposed through the first reflow chamber, one end of the ferrule is disposed through the first outlet end, and the ferrule seat is disposed at the first inlet end of the first reflow chamber and is connected to the other end of the ferrule.
Drawings
Fig. 1 is a schematic illustration of a dual lumen arterial cannula of an ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention.
Fig. 2 is an exploded view of a dual lumen arterial cannula of an ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a cannula body of an ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention.
Fig. 4 is an enlarged view of a in fig. 3.
Fig. 5 is an enlarged view of B in fig. 3.
Fig. 6 is a partial cross-sectional view of a cannula body of an ECMO system with a dual lumen arterial cannula in accordance with an embodiment of the present invention.
Fig. 7 is a schematic diagram of the connection of an ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention.
Reference numerals:
1. A cannula body; 11. a first reflow chamber; 111. a first inlet end; 112. a first outlet end; 1121. a first main return hole; 1122. a first side return hole; 12. a second reflow chamber; 121. a second inlet end; 122. a second outlet end; 1221. a first hole; 1222. a second hole; 123. a guide cambered surface; 13. an inner layer; 14. an outer layer; 15. a diaphragm;
2. A ferrule assembly; 21. a core insert; 22. a cartridge seat;
31. reinforcing ribs; 32. a hemostatic cap; 33. a connecting pipe;
4. A connecting pipeline;
5. driving a pump;
6. an oxygenator;
7. Intravenous cannula; 71. a drainage inlet; 72. a drainage outlet;
81. A left ventricle; 82. an aorta; 821. ascending aorta; 822. aortic arch; 823. descending aorta; 83. and (3) veins.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
An ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention is described below with reference to fig. 1-7.
As shown in fig. 1 to 7, an ECMO system with a dual lumen arterial cannula according to an embodiment of the present invention includes: a double-cavity arterial cannula, a venous cannula 7, a connecting pipeline 4, a driving pump 5 and an oxygenator 6.
The double-cavity arterial cannula comprises a cannula body 1, the cannula body 1 is provided with a first backflow cavity 11 and a second backflow cavity 12 which are mutually independent, the first backflow cavity 11 and the second backflow cavity 12 extend along the length direction of the cannula body 1, the first backflow cavity 11 is respectively provided with a first inlet end 111 and a first outlet end 112 along the two ends of the cannula body 1 along the length direction, the second backflow cavity 12 is respectively provided with a second inlet end 121 and a second outlet end 122 along the two ends of the cannula body 1 along the length direction, the first inlet end 111 is arranged adjacent to the second inlet end 121, the first inlet end 111 and the second inlet end 121 extend out of a human body, the second outlet end 122 is arranged between the first outlet end 112 and the first inlet end 111 along the length direction of the cannula body 1, the first outlet end 112 is suitable for extending into an ascending aorta 821 or an aortic arch 822 of the human body, the second outlet end 122 is suitable for extending into a descending aorta of the human body, the venous cannula 7 is provided with a drainage inlet 71 and an outlet 72, and the drainage 71 extends into a vein 83 or a right atrium of the human body 823. For example, vein 83 may be the femoral vein, superior vena cava, or inferior vena cava.
The connecting pipeline 4 is arranged outside the human body, one end of the connecting pipeline 4 is communicated with the first inlet end 111 and the second inlet end 121, the other end of the connecting pipeline 4 is communicated with the drainage outlet 72, and the driving pump 5 and the oxygenator 6 are connected in series on the connecting pipeline 4.
When the ECMO system with the double-cavity arterial cannula according to the embodiment of the present invention is in operation, the venous cannula 7 can introduce venous 83 blood into the connecting pipeline 4 and drive the venous cannula into the first inlet end 111 and the second inlet end 121 under the action of the driving pump 5, and the first outlet end 112 is suitable for extending into the ascending aorta 821 or the aortic arch 822, and the second outlet end 122 is suitable for extending into the descending aorta 823, so that blood oxygenated by the oxygenator 6 can be driven into the ascending aorta 821 or the aortic arch 822 through the first outlet end 112, and the blood injected into the aorta 82 can be dispersed through the second outlet end 122 to reduce the flow rate of blood injected into the aorta 82, so as to avoid thrombus.
It will be appreciated that the dual lumen arterial cannula of the embodiments of the present invention may be used in a standard VA-ECMO system and is suitable for use in situations where a patient experiences sudden cardiac arrest or a malignant arrhythmia.
It should be noted that the double-lumen arterial cannula has a certain elastic deformation capability, i.e. the double-lumen arterial cannula may be bent and extended according to the direction of the aorta 82. In other words, the longitudinal direction of the cannula body 1 may be the same as the orientation of the aorta 82 (ascending aorta 821+aortic arch 822 and descending aorta 823).
The length of the cannula body 1 may be designed according to the posture of the patient, and the length of the cannula body 1 is not particularly limited in the present application.
Alternatively, as shown in fig. 3 and 5, the first outlet end 112 includes a first main return aperture 1121 and a plurality of first side return apertures 1122, the first main return aperture 1121 being provided at an end of the cannula body 1 in a length direction of the cannula body 1, the first side return aperture 1122 being disposed adjacent to the first main return aperture 1121, and the plurality of first side return apertures 1122 being disposed circumferentially and axially spaced around the cannula body 1. It will be appreciated that the first main return hole 1121 and the plurality of first side return holes 1122 may be used to pump the blood in the first return chamber 11 into the ascending aorta 821 or the aortic arch 822, and since the second outlet 122 is already partially dispersed with the blood, the flow rate of the first outlet 112 is reduced, and when the blood at the position of the first outlet 112 is pumped into the ascending aorta 821 or the aortic arch 822 through the first main return hole 1121 and the plurality of first side return holes 1122, the probability of thrombus generation is reduced, the circulation efficiency of the blood is improved, and the use effect is better.
Optionally, as shown in fig. 3 and 4, the second outlet end 122 is provided with at least two second backflow holes, where the at least two second backflow holes are all arranged at intervals along the length direction of the cannula body 1, and the second backflow holes are all arranged on the same side of the cannula body 1 along the radial direction of the cannula body 1.
It will be appreciated that the two second return apertures may be spaced apart along the extension of the cannula body 1. Through experimental study, the inventor of the present application found that when the second backflow hole is a single hole, the blood discharged from the second backflow hole has a larger flow velocity, and further impacts the inner wall of the descending aorta 823, on the one hand, the descending aorta 823 is damaged, on the other hand, since the blood fed out by the descending aorta 823 flows along the top-down direction, and the blood injected into the second backflow hole flows along the bottom-up direction, further generates a larger impact between the two, and thus thrombus is easy to be caused, and life safety of a patient is threatened.
Therefore, by arranging two or more second backflow holes, the double-cavity arterial cannula can reduce the flow rate of blood which is injected into the descending aorta 823, reduce the impact on the wall of the descending aorta 823, is not easy to generate thrombus, and has good use effect.
In addition, as shown in fig. 3, 4 and 6, the second reflow holes are all provided on the same side of the cannula body 1 in the radial direction of the cannula body 1, in other words, the opening directions of the two second reflow holes are the same, whereby the problem of thrombus occurrence in the left ventricle 81 and the descending aorta 823 can be further avoided.
In an example, as shown in fig. 3, 4 and 6, the second reflow hole includes a first hole 1221 and a second hole 1222, the first hole 1221 is closer to the first outlet end 112 than the second hole 1222, and the first hole 1221 is disposed at an end of the second reflow chamber 12, and an inner wall of the second reflow chamber 12 has a guiding cambered surface 123, and the guiding cambered surface 123 is recessed toward a direction away from the first hole 1221 and is connected with an outer edge of the first hole 1221. It will be appreciated that the first hole 1221 is provided to the left of the second hole 1222, i.e. the first hole 1221 is closer to the first outlet end 112, as shown in fig. 3. For example, the second outlet end 122 (first hole 1221 and second hole 1222) is provided at an intermediate position of the cannula body 1 in the longitudinal direction of the cannula body 1. Since the first hole 1221 is disposed at the end of the second backflow chamber 12, the guide cambered surface 123 is recessed toward a direction away from the first hole 1221 and is connected with the outer edge of the first hole 1221, so that the blood in the second backflow chamber 12 can be smoothly discharged through the first hole 1221. Wherein the guide arc surface 123 smoothly transitions with the outer edge of the first hole 1221 so as not to affect the flow rate of blood and reduce the probability of thrombus generation.
Further, the outer circumferential profile of the second hole 1222 is circular or oval, so that the blood can be discharged more smoothly, and the arc-shaped outer circumferential profile of the second hole 1222 can avoid the problem of stress concentration at the opening position of the cannula body 1, which is beneficial to prolonging the service life of the cannula body 1.
In some embodiments, as shown in FIG. 6, the cross-sectional area of the second return lumen 12 is A1 and the cross-sectional area of the first return lumen 11 is A2, 1.2.ltoreq.A2/A1.ltoreq.2 in a cross-section orthogonal to the length direction of the cannula body 1 (cross-section of the cannula body 1). For example, the ratio of A2/A1 may be 1.2, 1.5, 1.8 and 2. I.e. the flow area of the first reflow chamber 11 is slightly larger. Through experimental research, the inventor of the application discovers that thrombus is not easy to generate when the ratio of A2/A1 is in the range, the blood circulation efficiency is higher, and the requirement of limb perfusion is met.
In some embodiments, as shown in fig. 4 and 5, the double lumen arterial cannula further comprises a stiffener 31, the stiffener 31 being helical and wound around the outer wall of the cannula body 1.
It will be appreciated that, as shown in fig. 4 and 5, the reinforcing ribs 31 play a certain supporting role on the cannula body 1, so as to avoid the problem that the cannula body 1 is compressed and shriveled or folded, which is beneficial to ensuring the blood circulation efficiency. On the other hand, the reinforcing rib 31 is spirally wound around the outer wall of the cannula body 1, and the spiral reinforcing rib 31 has a certain pitch. Therefore, the arrangement of the reinforcing ribs 31 has less influence on the function of bending deformation of the cannula body 1. In other words, the spiral reinforcing ribs 31 can make the cannula main body 1 have a certain supporting property, ensure smooth blood flow, facilitate bending deformation of the cannula main body 1, and have good use effect.
Alternatively, as shown in fig. 4 and 5, the outer wall of the cannula body 1 comprises an inner layer 13 and an outer layer 14, the first and second flashback chambers 11, 12 being located within the inner layer 13, the stiffening ribs 31 being located between the inner layer 13 and the outer layer 14. It will be appreciated that the outer wall of the cannula body 1 is of a sandwich construction, i.e. the outer wall of the cannula body 1 is divided into an inner layer 13 and an outer layer 14. The reinforcing ribs 31 are spirally wound in the gap between the inner layer 13 and the outer layer 14. For example, the cannula body 1 and the ribs 31 are formed by a dip molding process. In the embodiment of the invention, the reinforcing ribs 31 are arranged between the inner layer 13 and the outer layer 14, namely the problem that the reinforcing ribs 31 damage blood vessels in the scheme that the reinforcing ribs 31 are arranged on the outer periphery of the cannula main body 1 is avoided, and the problem that the reinforcing ribs 31 obstruct blood circulation in the scheme that the reinforcing ribs 31 are arranged on the inner periphery of the cannula main body 1 is also avoided.
For example, the cannula body 1 is made of at least one of PVC, TPU and SUS 304. The reinforcing rib 31 is made of at least one of SUS304 and nickel titanium wire. It will be appreciated that the material of the cannula body 1 may be softer and the material of the ribs 31 may be harder. In addition, since the reinforcing ribs 31 are wires (stainless steel wires or nickel titanium wires) and are wound around the cannula body 1, a developing effect can be also provided, which is helpful for ultrasonic positioning.
Alternatively, as shown in fig. 6, an elastic diaphragm 15 is provided in the inner layer 13, the diaphragm 15 dividing the cavity of the inner layer 13 into a first reflow chamber 11 and a second reflow chamber 12, for example, the diaphragm 15 is PVC or TPU. It is understood that the material of the separator 15 may be the same as that of the inner layer 13 and the outer layer 14, or other materials may be used. The diaphragm 15 has certain elasticity, so that the flow rate of the blood flowing out of the first backflow cavity 11 and the flow rate of the blood flowing out of the second backflow cavity 12 of the cannula main body 1 adaptively fluctuate within a certain range, and the use effect is good.
In one example, the thickness of the diaphragm 15 is 0.1mm or more and 0.2mm or less. For example, the thickness of the diaphragm 15 may be 0.1mm, 0.15mm, and 0.2mm. Thereby, the occupation of the cavity in the cannula main body 1 can be reduced, the diaphragm 15 can be ensured to have a certain structural strength, and the service life of the cannula main body 1 can be prolonged.
Optionally, the cannula body 1 has a wall thickness of 0.2mm or more and 0.5mm or less. For example, the thickness of the outer wall of the cannula body 1 may be 0.2mm, 0.3mm, 0.4mm and 0.5mm. Thereby, not only a certain structural strength of the cannula body 1 can be ensured, but also the outer diameter of the cannula body 1 can be reduced.
In some embodiments, as shown in fig. 2, the dual-lumen arterial cannula further includes a ferrule assembly 2, where the ferrule assembly 2 includes a ferrule 21 and a ferrule holder 22, where the ferrule 21 is disposed through the first reflow chamber 11, and one end of the ferrule 21 is disposed through the first outlet end 112, and the ferrule holder 22 is disposed at the first inlet end 111 of the first reflow chamber 11 and is connected to the other end of the ferrule 21. It will be appreciated that when the cannula body 1 is placed in the human body, the core insert assembly 2 may be first installed into the cannula body 1, and the cannula body 1 may be inserted into the aorta 82 with the aid of the core insert assembly 2; after the cannula body 1 is placed in position, the ferrule assembly 2 may be removed from the cannula body 1, thereby facilitating the medical personnel to push the cannula body 1 to the predetermined location of the aorta 82.
Wherein the end of the ferrule 21 facing away from the ferrule holder 22 may be provided with a guide wire (not shown) to assist insertion of the cannula body 1 into the aorta 82. The end of the insert core 21 is in a slender cone shape, the insert core 21 can be made of PVC or PE, and the developer is contained in the insert core 21, so that ultrasonic positioning is facilitated.
In other examples, as shown in fig. 2, the first inlet end 111 and the second inlet end 121 are each positioned with a hemostatic cap 32. Before the cannula body 1 is inserted into a human body, the hemostatic cap 32 may be first installed at the positions of the first inlet end 111 and the second inlet end 121 to block the first inlet end 111 and the second inlet end 121, so that the blood can be prevented from overflowing from the positions of the first inlet end 111 and the second inlet end 121 during the catheterization. When the placement is completed, the hemostatic cap 32 may be removed and the first and second inlet ends 111, 121 may be mounted to the corresponding connecting lines 4.
As shown in fig. 1 and 2, the first inlet end 111 (the second inlet end 121) is conveniently plugged with the hemostatic cap 32 or the connecting tube 4. A connecting tube 33 may be disposed between the first inlet end 111 (the second inlet end 121) and the hemostatic cap 32, the hardness of the connecting tube 33 is harder than that of the cannula main body 1, one end of the connecting tube 33 is inserted into the first inlet end 111 (the second inlet end 121), or one end of the connecting tube 33 facing away from the cannula main body 1 serves as the first inlet end 111 (the second inlet end 121), and the other end of the connecting tube 33 is used for inserting the hemostatic cap 32 or the connecting tube 4, so that the dual-lumen arterial cannula is more convenient and faster in use.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. An ECMO system having a dual lumen arterial cannula, comprising:
The double-cavity arterial cannula comprises a cannula main body, wherein the cannula main body is provided with a first backflow cavity and a second backflow cavity which are mutually independent, the first backflow cavity and the second backflow cavity extend along the length direction of the cannula main body, the first backflow cavity is provided with a first inlet end and a first outlet end, the second backflow cavity is provided with a second inlet end and a second outlet end, the first inlet end is adjacent to the second inlet end, the second outlet end is arranged between the first outlet end and the first inlet end along the length direction of the cannula main body, the first outlet end is suitable for extending into the ascending aorta or the aortic arch of a human body, the second outlet end is suitable for extending into the descending aorta of the human body, and the first inlet end and the second inlet end are suitable for extending out of the human body;
a venous cannula having a drainage inlet and a drainage outlet, the drainage inlet extending into a vein or right atrium of a human body;
the connecting pipeline is arranged outside the human body, one end of the connecting pipeline is communicated with the first inlet end and the second inlet end, and the other end of the connecting pipeline is communicated with the drainage outlet;
The driving pump and the oxygenator are connected in series on the connecting pipeline.
2. The ECMO system with dual lumen arterial cannula of claim 1, wherein the first outlet port includes a first main return aperture and a plurality of first side return apertures, the first main return aperture being disposed at an end of the cannula body along a length of the cannula body, the first side return aperture being disposed adjacent the first main return aperture, and the plurality of first side return apertures being disposed circumferentially and axially spaced around the cannula body.
3. The ECMO system with double lumen arterial cannula according to claim 1, wherein the second outlet end is provided with at least two second return holes, at least two second return holes are each arranged at intervals along the length direction of the cannula body, and the second return holes are each arranged on the same side of the cannula body in the radial direction of the cannula body.
4. The ECMO system with double lumen arterial cannula of claim 3, wherein the second backflow well comprises a first well and a second well, the first well is closer to the first outlet end than the second well, and the first well is provided at an end of the second backflow well, an inner wall of the second backflow well has a guiding cambered surface, the guiding cambered surface is concave towards a direction away from the first well, the guiding cambered surface is connected with an outer edge of the first well, and a peripheral outline of the second well is circular or elliptical.
5. The ECMO system with double lumen arterial cannula according to claim 1, characterized in that the cross-sectional area of the cannula body is A1 and the cross-sectional area of the first flashback chamber is A2, 1.2. Ltoreq.a2/a1.ltoreq.2.
6. The ECMO system with a double lumen arterial cannula of claim 1, further comprising a stiffener that is helical and wrapped around an outer wall of the cannula body.
7. The ECMO system with double lumen arterial cannula of claim 6, wherein an outer wall of the cannula body comprises an inner layer and an outer layer, the first flashback chamber and the second flashback chamber being located within the inner layer, the stiffener being located between the inner layer and the outer layer.
8. The ECMO system with double lumen arterial cannula according to claim 7, wherein the cannula body is at least one of PVC, TPU and SUS 304;
and/or the reinforcing rib is made of at least one of SUS304 and nickel titanium wires.
9. The ECMO system with double lumen arterial cannula according to claim 7, characterized in that an elastic septum is provided in the inner layer, the septum dividing the cavity of the inner layer into the first and second flashback chambers, the thickness of the septum being equal to or greater than 0.1mm and equal to or less than 0.2mm, the wall thickness of the cannula body being equal to or greater than 0.2mm and equal to or less than 0.5mm.
10. The ECMO system with a dual lumen arterial cannula of any one of claims 1-9, further comprising a ferrule assembly including a ferrule and a ferrule mount, the ferrule passing through the first flashback chamber and one end of the ferrule passing out of the first outlet end, the ferrule mount being disposed at a first inlet end of the first flashback chamber and connected to the other end of the ferrule.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410580317.0A CN118161690A (en) | 2024-05-11 | 2024-05-11 | ECMO system with dual lumen arterial cannula |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410580317.0A CN118161690A (en) | 2024-05-11 | 2024-05-11 | ECMO system with dual lumen arterial cannula |
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| CN202410580317.0A Pending CN118161690A (en) | 2024-05-11 | 2024-05-11 | ECMO system with dual lumen arterial cannula |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130158338A1 (en) * | 2011-12-19 | 2013-06-20 | Cardiacassist, Inc. | Dual Lumen Cannula |
| CN108601881A (en) * | 2015-01-26 | 2018-09-28 | 伊克尼奥斯股份有限公司 | With the device for drawing circuit, pressure line and pump |
| CN208448408U (en) * | 2017-08-31 | 2019-02-01 | 常州市康心医疗器械有限公司 | Two-chamber jugular vein intubation both with a kind of high resiliency and flexibility |
| CN208448407U (en) * | 2017-08-31 | 2019-02-01 | 常州市康心医疗器械有限公司 | A kind of two-chamber jugular vein intubation |
| CN218774140U (en) * | 2022-07-07 | 2023-03-31 | 中国医学科学院阜外医院深圳医院(深圳市孙逸仙心血管医院) | Single double-cavity cannula implanted with ventricular assist system through periphery |
| CN218774141U (en) * | 2022-07-07 | 2023-03-31 | 中国医学科学院阜外医院深圳医院(深圳市孙逸仙心血管医院) | Single-tube double-cavity cannula peripherally inserted into central vein |
| CN116271418A (en) * | 2023-03-18 | 2023-06-23 | 中国人民解放军空军军医大学 | ECMO-IABP composite double-cavity arterial cannula |
| DE102022111626A1 (en) * | 2022-05-10 | 2023-11-16 | CardioSurge GmbH | DOUBLE LUMEN CANNULA |
-
2024
- 2024-05-11 CN CN202410580317.0A patent/CN118161690A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130158338A1 (en) * | 2011-12-19 | 2013-06-20 | Cardiacassist, Inc. | Dual Lumen Cannula |
| CN108601881A (en) * | 2015-01-26 | 2018-09-28 | 伊克尼奥斯股份有限公司 | With the device for drawing circuit, pressure line and pump |
| CN208448408U (en) * | 2017-08-31 | 2019-02-01 | 常州市康心医疗器械有限公司 | Two-chamber jugular vein intubation both with a kind of high resiliency and flexibility |
| CN208448407U (en) * | 2017-08-31 | 2019-02-01 | 常州市康心医疗器械有限公司 | A kind of two-chamber jugular vein intubation |
| DE102022111626A1 (en) * | 2022-05-10 | 2023-11-16 | CardioSurge GmbH | DOUBLE LUMEN CANNULA |
| CN218774140U (en) * | 2022-07-07 | 2023-03-31 | 中国医学科学院阜外医院深圳医院(深圳市孙逸仙心血管医院) | Single double-cavity cannula implanted with ventricular assist system through periphery |
| CN218774141U (en) * | 2022-07-07 | 2023-03-31 | 中国医学科学院阜外医院深圳医院(深圳市孙逸仙心血管医院) | Single-tube double-cavity cannula peripherally inserted into central vein |
| CN116271418A (en) * | 2023-03-18 | 2023-06-23 | 中国人民解放军空军军医大学 | ECMO-IABP composite double-cavity arterial cannula |
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