ECMO arterial duct capable of changing perfusion blood flow direction

Abstract

The invention relates to the technical field of medical supplies, in particular to an ECMO arterial duct capable of changing the perfusion blood flow direction, which comprises a duct body with openings at two ends, the right end of the duct body is a pre-flushing section, the middle end of the duct body is a buffer section, and the left end of the duct body is a perfusion section; the perfusion section comprises a central tube cavity and three side tube cavities, the central tube cavity is formed in the middle end of the interior of the tube body, three equally-divided partition plates are arranged on the peripheral side of the central tube cavity, and the three partition plates divide the tube body into the three side tube cavities; and the inner wall of the left end of the side tube cavity is a blood flow redirection diversion curved surface. According to the invention, the arterial duct cavity is designed into the central lumen for forward blood flow and the three lateral lumens for variable-direction blood flow, so that the blood flow direction of the ECMO arterial duct is consistent with the physiological direction to the greatest extent, the adverse effect of ECMO on left heart output and the damage to vascular endothelium are weakened, and the treatment effect of the ECMO is improved. And the hemodynamic stability and safety in the VA-ECMO implementation process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical supplies, in particular to an ECMO arterial catheter capable of changing the direction of perfused blood flow. Background Art

[0002] ECMO (extracorporeal membrane lung) technology is a restrictive medical technology used to maintain oxygenation and blood perfusion in the perioperative period of cardiopulmonary surgery and in patients with acute severe cardiopulmonary failure. VA-ECMO technology draws blood from a central venous catheter, and after being fully oxygenated by an artificial membrane lung, it is pumped into the aorta by a central arterial catheter to partially replace the cardiopulmonary function. Since the optional location for central arterial catheterization is usually located at the distal end of the trunk, limbs and cervical chest connection (such as: femoral artery, axillary artery, common carotid artery), the catheter is placed from the distal end to the proximal end, resulting in the perfusion blood flow direction of the traditional single-lumen arterial catheter being opposite to the physiological blood flow direction of the aorta.

[0003] The purpose of VA-ECMO technology is to establish an extracorporeal oxygenation perfusion pathway to compensate for systemic hypotension and hypoperfusion caused by low cardiac output. However, the traditional single-lumen arterial catheter causes the perfusion blood flow to hinder the left heart output function, leading to further failure of left heart function; moreover, with the increase of ECMO flow, the restriction on left heart output is even greater. In addition, the perfusion blood flow in the opposite direction of physiological blood flow causes serious hemodynamic disorders in the aortic arch, including: arterial endothelial damage, glycocalyx loss, decreased blood flow velocity, insufficient distal perfusion pressure, red blood cell destruction, coagulation factor consumption, inflammatory storm, and other adverse complications. Although the incidence of ECMO can be partially reduced by improving ECMO maintenance technology, there is no good solution so far. Therefore, the serious adverse complications in the use of VA-ECMO technology limit the improvement of ECMO technology on patient prognosis. Summary of the invention

[0004] The purpose of the present invention is to provide an ECMO arterial catheter that can change the direction of perfused blood flow. Through the central lumen and three side lumens, the perfused blood can be divided into a central blood flow and three side blood flows. After the blood flow direction is changed by the blood flow redirection guide curved surface, it flows out from the blood flow redirection hole into the aorta, so that the direction of the side blood flow is consistent with the physiological blood flow direction of the aorta, which will effectively solve the various complications existing in traditional single-lumen arterial catheters.

[0005] The technical solution of the present invention:

[0006] An ECMO arterial catheter capable of changing the direction of perfusion blood flow comprises a tube body with openings at both ends, wherein the right end of the tube body is a pre-flushing section, the middle end is a buffer section, and the left end is a perfusion section;

[0007] The buffer section comprises a central lumen and three side lumens, the central lumen is provided at the middle end of the inner part of the tube body, and three equally divided partitions are provided on the outer peripheral side of the central lumen, and the three partitions divide the tube body into three side lumens; the inner wall of the left end of the side lumen is a blood flow redirection guide curved surface, and the outer wall of the tube body is provided with a blood flow redirection hole matched with the guide curved surface;

[0008] The left end of the central tube cavity extends to the left end opening of the tube body.

[0009] Furthermore, the outer diameter of the tube body gradually decreases from right to left, and the tube core has a conical tip.

[0010] Furthermore, it also includes a tube core, which includes a trunk, a base plate at the left end of the trunk, a central guide core for filling the central lumen in the middle of the left side surface of the base plate, and three side guide cores for filling the three side lumens in a ring shape located outside the central guide core on the left side surface of the base plate.

[0011] Furthermore, the pre-punching section is provided with a chuck, the main trunk is provided with a claw matched with the chuck, and the right end of the main trunk is provided with a hand-held handle.

[0012] Furthermore, the hand-held handle, the main trunk, the base plate, and the central guide core all have a channel for the guide wire to pass through.

[0013] Furthermore, the pre-punching section is provided with a side hole, and the side hole is detachably threadedly connected with a sealing screw cap.

[0014] Beneficial effects of the present invention:

[0015] The present invention designs the arterial catheter lumen as a central lumen for forward blood flow and three side lumens for redirected blood flow, thereby maximally achieving the consistency between the ECMO arterial catheter blood flow direction and the physiological direction, reducing the adverse effects of ECMO on left heart output and damage to the vascular endothelium, and improving the hemodynamic stability and safety during VA-ECMO implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a structural diagram of the tube body.

[0018] Figure 3 This is a diagram of the internal structure of the tube body.

[0019] Figure 4 It is a cross-sectional view of the buffer section.

[0020] Figure 5 It is a schematic diagram of the structure of the blood flow redirection guide surface.

[0021] Figure 6 It is a schematic diagram of the structure of the tube core.

[0022] Figure 7 It is a schematic diagram of the structure of the central guide core and the side guide core.

[0023] Figure 8 This is an exploded view of the central guide core and the side guide core.

[0024] Fig. 9 It is a structural schematic diagram of a sealing screw cap. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-Figure 9 As shown, the present invention provides a first embodiment of an ECMO arterial catheter capable of changing the direction of perfused blood flow, comprising a tube body 1 with openings at both ends, wherein the right end of the tube body 1 is a pre-flushing section 3, the middle end is a buffer section 4, and the left end is a perfusion section 7;

[0027] The buffer section 4 includes a central lumen 41 and three side lumens 42. The central lumen 41 is provided at the middle end of the tube body 1. The outer peripheral side of the central lumen 41 is provided with three equally divided partitions 43. The three partitions 43 divide the tube body 1 into three side lumens 42. The inner wall of the left end of the side lumen 42 is a blood flow redirection curved surface 44. The outer wall of the tube body 1 is provided with a blood flow redirection hole 45 that matches the curved surface.

[0028] The left end of the central tube cavity 41 extends to the left end opening of the tube body 1 .

[0029] After the tube body 1 is inserted into the artery, the right end of the tube body 1 is exposed to the outside, and then it is connected to the ECMO pipeline for blood perfusion. During the perfusion process, after the blood enters the buffer section 4 from the priming section, it is divided into a central blood flow and three side blood flows, the central blood flow enters the central lumen 41, and the three side blood flows enter the three side lumens 42; the central blood flow enters the blood vessel through the opening at the left end of the tube body 1, and the direction of the central blood flow is opposite to the blood flow direction in the blood vessel; after the side blood flow enters the side lumen 42, the blood flow direction is changed by the blood flow redirection guide curved surface 44, and then it flows out from the blood flow redirection hole 45 into the aorta. At this time, the blood flow redirection guide curved surface 44 redirects the direction of the side blood flow, so that the direction of the side blood flow is consistent with the physiological blood flow direction of the aorta, thereby reducing the adverse effects of VA-ECMO on left heart output and damage to the vascular endothelium.

[0030] Based on the first embodiment, the present invention provides a second embodiment of an ECMO arterial catheter capable of changing the direction of perfused blood flow, wherein the outer diameter of the tube body 1 gradually decreases from right to left, and each lumen inside the tube body 1 also decreases accordingly, so that the tube body 1 can be smoothly inserted into the artery;

[0031] It also includes a filling core 5 matched with the tube body 1, the core 5 includes a main trunk 51, the left end of the main trunk 51 has a base plate 52, the middle of the left side of the base plate 52 has a central guide core 53 for filling the central tube cavity 41, and the left side of the base plate 52 is located outside the central guide core 53 and has three side guide cores 54 for filling three side tube cavities 42; the left end of the central guide core 53 exceeds the tube body 1 and continues to gradually shrink forward to a conical tip. .

[0032] The tube core 5 is inserted into the tube body 1 so that the portion 2 of the tube core 5 that exceeds the tube body 41 extends out from the opening at the left end of the tube body 1, and is integrally formed with the tube body 1 to form a vascular stoma dilator; the central guide core 53 fills the central lumen 41, and the side guide core 54 fills the side lumen 42, to prevent blood from spraying out of the side lumen 42 during the catheterization process.

[0033] On the basis of the second embodiment, the present invention provides a third embodiment of an ECMO arterial catheter capable of changing the direction of perfused blood flow, wherein the pre-punching section 3 is provided with a chuck 31, and the trunk 51 is provided with a claw 55 matched with the chuck 31, and the claw 55 is normally inclined toward the direction close to the trunk 51. During the process of inserting the core tube 5 into the tube body 1, the claw 55 is pulled away from the trunk 51, and the claw 55 is deformed. After the core tube 5 is inserted into the tube body 1, the claw 55 is released, and the claw 55 is reset toward the direction close to the trunk 51 due to the reset effect, so that the claw 55 is stuck on the chuck 31, thereby preventing the core tube 5 from being separated from the tube body 1 during the catheterization process.

[0034] The right end of the trunk 51 is provided with a hand grip 56 for medical personnel to hold.

[0035] Based on the third embodiment, the present invention provides a fourth embodiment of an ECMO arterial catheter capable of changing the direction of perfused blood flow, wherein the hand-held handle 56, the trunk 51, the base plate 52, and the central guide core 53 all have a channel 57 for the guide wire 6 to pass through, and the guide wire 6 is an ultra-smooth loach guide wire 6.

[0036] The guide wire 6 can play a guiding role in the process of inserting the tube body 1 into the artery.

[0037] Based on any of the above embodiments, the present invention provides a fifth embodiment of an ECMO arterial catheter capable of changing the direction of perfused blood flow, wherein the pre-punch section 3 has a side hole 32 for pre-filling, exhausting and side branch shunting.

[0038] The side hole 32 is detachably threaded with a sealing screw cap 33 , and the side hole 32 can be opened and closed by the sealing screw cap 33 .

[0039] The above description is only a preferred embodiment of the present invention and should not be construed as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An ECMO arterial catheter capable of changing the direction of perfused blood flow, comprising a tube body with openings at both ends, characterized in that: The right end of the tube body is a pre-punching section, the middle end is a buffer section, and the left end is a perfusion section; The buffer section includes a central lumen and three side lumens. The central lumen is provided at the middle end of the inner part of the tube body, and three equally divided partitions are provided on the outer peripheral side of the central lumen. The three partitions divide the tube body into three side lumens. The inner wall of the left end of the side lumen is a blood flow redirection guide surface, and a blood flow redirection hole cooperating with the guide surface is opened on the outer wall of the tube body. The left end of the central lumen extends to the opening at the left end of the tube body.

2. An ECMO arterial catheter capable of changing the direction of perfusion blood flow according to claim 1, characterized in that: The outer diameter of the tube body gradually decreases from right to left, and the tube core has a conical tip.

3. An ECMO arterial catheter capable of changing the direction of perfusion blood flow according to claim 2, characterized in that: It also includes a tube core, which includes a trunk, a base plate at the left end of the trunk, a central guide core for filling the central lumen in the middle of the left side of the base plate, and three side guide cores for filling the three side lumens in a ring shape located outside the central guide core on the left side of the base plate.

4. An ECMO arterial catheter capable of changing the direction of perfusion blood flow according to claim 3, characterized in that: The pre-punching section is provided with a chuck, and the main trunk is provided with a clamping claw matched with the chuck; and the right end of the main trunk is provided with a hand-held handle.

5. An ECMO arterial catheter capable of changing the direction of perfusion blood flow according to claim 4, characterized in that: The hand-held handle, the main trunk, the base plate and the central guide core all have channels for the guide wire to pass through.

6. The ECMO arterial catheter capable of changing the direction of perfusion blood flow according to claim 1, characterized in that: The pre-punching section is provided with a side hole; the side hole is detachably threadedly connected with a sealing screw cap.

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