Double-cavity cannula for ECMO

Abstract

The utility model provides a double-cavity cannula for an ECMO, which comprises an outer cannula, an inner cannula and a connecting piece, and the outer cannula comprises an external section, a telescopic section and a stretching section which are connected in sequence; the inner pipe is arranged in the outer sleeve, one end of the inner pipe is a stretching-in end and penetrates out of a port of the stretching-in section, the other end of the inner pipe is an external end and penetrates out of one side of the external section, and the inner pipe is fixedly connected with the external section; and the adjusting assembly is used for controlling the telescopic section to perform telescopic adjustment. According to the device, a blood inflow channel and a blood outflow channel can be placed at the same time only by cutting a puncture opening through the mode of the inner sleeve and the outer sleeve, so that the number of surgical incisions is reduced, the pain of a patient is relieved, the time needed by intubation is shortened, and precious time is won for rescue of the patient.

Description

Technical Field

[0001] The utility model specifically relates to a double-lumen cannula for ECMO. Background Art

[0002] Extracorporeal membrane oxygenation (ECMO) is an expansion and extension of the scope of extracorporeal circulation (CPB) technology. ECMO can provide effective respiratory and circulatory support for critically ill patients with respiratory and / or circulatory insufficiency who require external assistance.

[0003] The extracorporeal membrane oxygenation technology currently used in clinical practice has been widely used in the supportive treatment of patients with severe circulatory or respiratory failure. During intubation, an inflow channel and an outflow channel need to be left in place. Currently, two intubation sites usually need to be punctured or incised to place the inflow channel and the outflow channel respectively. The increase in incisions aggravates the patient's pain and increases the risk of bleeding and infection, and prolongs the intubation time, delaying the rescue time. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model proposes a double-lumen cannula for ECMO to solve the problem that two cannula sites need to be punctured or incised to respectively place the inflow channel and the outflow channel, which causes the patient's pain to increase and the risk of bleeding and infection, and the cannula time is prolonged, delaying the rescue time.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a double-lumen cannula for ECMO, comprising:

[0007] An outer sleeve, comprising an external section, a telescopic section and an insertion section connected in sequence;

[0008] An inner tube, which is built into the outer tube, one end of the inner tube is the insertion end and passes through the port of the insertion section, the other end of the inner tube is the external end and passes through one side of the external section, and the inner tube is fixedly connected to the external section; and

[0009] The adjusting component is used to control the telescopic section to perform telescopic adjustment.

[0010] It can be seen from the above technical scheme that the double-lumen cannula for ECMO provided by the utility model, when used specifically, the external segment port of the outer tube and the external end of the inner tube are connected to the extracorporeal membrane lung device respectively, and after the outer tube is inserted into the puncture point, the insertion segment of the outer tube is first inserted into the opening of the patient's heart aorta, and then the telescopic segment is adjusted by the adjustment component to adjust the distance of the insertion end of the inner tube protruding from the insertion segment port, so as to put the insertion end into the left ventricle of the heart. When performing extracorporeal membrane oxygenation, the outer tube serves as a blood inflow channel to return the blood after membrane oxygenation to the human body, and the inner tube serves as a blood outflow channel to be responsible for inputting human blood into the extracorporeal membrane lung device for oxygenation to achieve circulation. This device, through the method of inner and outer outer tubes, only needs to cut a puncture port, and the blood inflow channel and outflow channel can be placed at the same time, which reduces the surgical incision, alleviates the patient's pain, shortens the time required for intubation, and wins precious time for the patient's rescue.

[0011] Furthermore, the adjustment assembly includes a ring buckle and a rotating sleeve, the ring buckle is installed on the outer side of one end of the extension section close to the telescopic section, the rotating sleeve movable sleeve is placed on the outer side of the outer sleeve and one end is connected to the ring buckle so that the rotating sleeve can rotate axially, and a threaded ring is installed on the other end of the rotating sleeve, and an external thread is provided on the outer side of one end of the external section close to the telescopic section, and the threaded ring is threadedly screwed on the external thread.

[0012] Furthermore, a developing ring is provided on the outer side of the port of the extension section and the outer side of the port of the inner tube extension end.

[0013] Furthermore, a through ring is provided on the inner side of the port of the insertion section, the through ring is connected to the inner wall of the insertion section through a plurality of connecting columns, and the inner tube is slidably inserted into the through ring.

[0014] Furthermore, a fixing ring is provided on the inner side of the external section, and the fixing ring is connected to the inner wall of the external section through a plurality of connecting columns, and the inner tube is passed through the fixing ring and fixedly connected to the fixing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 It is a cross-sectional view of a schematic diagram of the main structure of an embodiment of a double-lumen cannula for ECMO of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0019] Reference numerals:

[0020] Outer sleeve 1, external section 11, fixing ring 111, telescopic section 12, extending section 13, passing ring 131;

[0021] Inner tube 2;

[0022] Adjustment assembly 3, buckle 31, rotating sleeve 32, threaded ring 321;

[0023] Development ring 4;

[0024] Connecting column 5. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] like Figure 1-3 As shown, this embodiment provides a double-lumen cannula for ECMO, including an outer tube 1, an inner tube 2 and an adjustment component 3.

[0029] See also Figure 1The outer sleeve 1 includes an external section 11, a telescopic section 12 and an insertion section 13 connected in sequence, and the telescopic section 12 is located between the external section 11 and the insertion section 13 and is connected to each other. The outer sleeve 1 serves as a blood inflow channel, returning the blood oxygenated by the membrane lung to the human body at the cardiac artery end. Among them, the external section 11 is used to connect to the extracorporeal membrane lung device, the telescopic section 12 can be a bellows, and the insertion section 13 is used to extend into the opening of the patient's heart aorta.

[0030] Please continue reading Figure 1 The inner tube 2 is used as a blood outflow channel, responsible for inputting human blood into the extracorporeal membrane lung device for oxygenation. The inner tube 2 is built into the outer tube 1, one end of the inner tube 2 is the insertion end and passes through the port of the insertion section 13, and the insertion end is used to be placed in the left ventricle of the heart to draw blood. The other end of the inner tube 2 is the external end and passes through one side of the external section 11, and the inner tube 2 is fixedly connected to the external section 11, and the external end is used to connect to the extracorporeal membrane lung device.

[0031] In order to accurately grasp the entry position of the extension section 13 port and the inner tube 2 extension end, as shown in FIG. Figure 3 As shown, in one embodiment, a developing ring 4 is provided on the outer side of the port of the insertion section 13 and the outer side of the port of the insertion end of the inner tube 2. The developing ring 4 can be made of a developing metal material.

[0032] like Figure 3 As shown, in one embodiment, a through ring 131 is provided inside the port of the insertion section 13, and the inner tube 2 can be slidably inserted into the through ring 131. The inner diameter of the through ring 131 is adapted to the outer diameter of the inner tube 2, which is conducive to effectively controlling the position of the inner tube 2 when adjusting the distance of the insertion end of the inner tube 2 protruding from the port of the insertion section 13. The through ring 131 is connected to the inner wall of the insertion section 13 through a plurality of connecting columns 5.

[0033] like Figure 2 As shown, further, a fixing ring 111 is provided on the inner side of the external section 11, and the fixing ring 111 is connected to the inner wall of the external section 11 through a plurality of connecting columns 5. The inner tube 2 is passed through the fixing ring 111 and fixedly connected to the fixing ring 111 to strengthen the relative fixation of the inner tube 2 and the external section 11 and prevent the position of the inner tube 2 from changing when the telescopic section 12 is adjusted.

[0034] Preferably, the connecting posts 5 are slender and channels are left between the multiple connecting posts 5 to prevent obstruction to blood circulation in the outer sleeve 1.

[0035] See also Figure 2The adjustment component 3 is used to control the telescopic section 12 to adjust the telescopic movement. Specifically, the adjustment component 3 includes a buckle 31 and a rotating sleeve 32. The buckle 31 is installed on the outer side of one end of the insertion section 13 close to the telescopic section 12. The rotating sleeve 32 is movably placed on the outer side of the outer sleeve 1 and one end is connected to the buckle 31 so that the rotating sleeve 32 can rotate axially. A threaded ring 321 is installed on the other end of the rotating sleeve 32. An external thread is arranged on the outer side of one end of the external section 11 close to the telescopic section 12. The threaded ring 321 is screwed on the external thread.

[0036] The utility model provides a double-lumen cannula for ECMO. When used, the external section 11 port of the outer tube 1 and the external end of the inner tube 2 are connected to the extracorporeal membrane lung device respectively. After the outer tube 1 is inserted into the puncture point, the insertion section 13 of the outer tube 1 is first inserted into the opening of the aorta of the patient's heart, and then the rotating sleeve 32 is rotated to adjust the telescopic section 12, and the distance of the insertion end of the inner tube 2 protruding from the insertion section 13 port is adjusted to put the insertion end into the left ventricle of the heart. When performing extracorporeal membrane oxygenation, the outer tube 1 serves as a blood inflow channel to return the blood after membrane oxygenation to the human body, and the inner tube 2 serves as a blood outflow channel to be responsible for inputting human blood into the extracorporeal membrane lung device for oxygenation to achieve circulation.

[0037] The device uses an inner and outer sheath method and only requires one puncture to place the blood inflow channel and outflow channel at the same time, reducing surgical incisions, alleviating the patient's pain, shortening the time required for intubation, and buying precious time for the patient's rescue.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A double-lumen cannula for ECMO, characterized in that: include: An outer sleeve, comprising an external section, a telescopic section and an insertion section connected in sequence; An inner tube, which is built into the outer tube, one end of the inner tube is the insertion end and passes through the port of the insertion section, the other end of the inner tube is the external end and passes through one side of the external section, and the inner tube is fixedly connected to the external section; and The adjusting component is used to control the telescopic section to perform telescopic adjustment.

2. A double-lumen cannula for ECMO according to claim 1, characterized in that: The adjustment assembly includes a ring buckle and a rotating sleeve. The ring buckle is installed on the outer side of one end of the extension section close to the telescopic section. The movable sleeve of the rotating sleeve is placed on the outer side of the outer sleeve and one end is connected to the ring buckle so that the rotating sleeve can rotate axially. A threaded ring is installed on the other end of the rotating sleeve. An external thread is provided on the outer side of one end of the external section close to the telescopic section, and the threaded ring is threadedly screwed on the external thread.

3. A double-lumen cannula for ECMO according to claim 1, characterized in that: The outer side of the port of the extending section and the outer side of the port of the inner tube extending end are both provided with developing rings.

4. A double-lumen cannula for ECMO according to claim 1, characterized in that: A through ring is arranged inside the port of the insertion section, the through ring is connected to the inner wall of the insertion section through a plurality of connecting columns, and the inner tube is slidably arranged inside the through ring.

5. A double-lumen cannula for ECMO according to claim 1, characterized in that: A fixing ring is arranged on the inner side of the external section, and the fixing ring is connected to the inner wall of the external section through a plurality of connecting columns, and the inner tube is passed through the fixing ring and fixedly connected to the fixing ring.

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