Aorta cannula
By placing positioning balloons one and two on the outside of the aortic cannula, the problems of aortic wall structure damage and cannula dislodgement during traditional aortic cannulation are solved, achieving stability and safety of cannulation and preventing the formation of pseudoaneurysms and aortic dissections.
Patent Information
- Application Number
- CN202520336959.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Traditional aortic cannulation can easily damage the aortic wall structure during the insertion process, forming pseudoaneurysms or aortic dissections. In addition, the high blood pressure in the aorta can easily cause the purse-string suture to tear, damaging the aortic wall and causing the cannula to dislodge.
Positioning balloons one and two are placed on the outside of the cannula body, respectively, and pressed tightly against the adventitia and intima of the aorta. They are connected to the syringe through an inflation catheter and a connecting hose to ensure that the balloons are stably positioned during cannulation, prevent blood flow from entering, and block blood flow from spurting out when the cannula is removed.
It effectively prevents the formation of aortic dissection and pseudoaneurysm, reduces damage to the aortic wall from the purse-string suture, ensures the stability and safety of the catheter, avoids catheter dislodgement, and protects the aortic wall structure.
Smart Images
Figure CN223641105U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of aortic cannulation technology, specifically, it relates to an aortic cannulation device. Background Technology
[0002] Currently, cardiac surgery involves a large volume of procedures. The standard intraoperative approach is a median thoracotomy, where cannulation is performed via the ascending aorta and superior and inferior vena cava (or right atrium) to establish cardiopulmonary bypass. Blood is drawn from the venous system, oxygenated via extracorporeal circulation, and then returned to the body through the aortic cannula. During aortic cannulation, a purse-string suture is placed at an appropriate location on the aortic wall, a rubber tube is fitted, and a mosquito clamp is clamped to the end of the suture. The entire thickness of the aorta is then incised within the purse-string suture with a sharp scalpel, the aortic cannula is inserted, the purse-string suture is tightened, and the aortic cannula and rubber tube are tied together with silk suture. The aortic wall consists of three layers (a thinner intima, a thicker media, and a thinner adventitia, generally 2-3 mm thick). The ascending aorta directly bears the blood pumped by the heart, resulting in rapid blood flow, high pressure, and significant blood shear force; therefore, cannulation in the ascending aorta carries a high risk.
[0003] Common complications of aortic cannulation include cannula dislodgement, pseudoaneurysm formation at the cannula site, and aortic dissection at the cannula site. These complications are extremely dangerous and can severely endanger the patient's life. Aortic cannulas are generally made of polyvinyl chloride (PVC) and consist of three main parts: the cannula tip, the cannula body, and the connector. Some cannulas also have surgical sutures for fixation. Based on the shape of the cannula tip, they are classified as straight-tip aortic cannulas and curved-tip aortic cannulas. There are many cannula sizes available; 22-24Fr cannulas are generally used for adults. Currently, aortic cannulation faces the following problems:
[0004] 1. Some patients have poor aortic wall quality, which can cause damage to the aortic wall structure during cannulation, making them prone to pseudoaneurysm or aortic dissection;
[0005] 2. The numerous tubes on the operating table pose a risk of surgical personnel pulling on the aortic cannula. Furthermore, the high blood pressure within the aorta increases the risk of purse-string suture tearing and damage to the aortic wall. In severe cases, cannula dislodgement can occur, leading to loss of blood supply and potential damage to vital organs. The brain, in particular, has a short tolerance for ischemia (approximately 5 minutes at normal temperature), and the time required for emergency treatment after cannula dislodgement far exceeds this safe timeframe. These complications undoubtedly increase the difficulty and duration of the surgery, negatively impacting the patient's outcome and, in severe cases, endangering their life.
[0006] Based on this, the present invention provides an aortic cannulation to solve the problems existing in the prior art. Utility Model Content
[0007] In view of this, the main objective of this utility model is to provide an aortic cannula to solve the problems of traditional aortic cannula, which are prone to causing damage to the aortic wall structure during the cannulation process, forming pseudoaneurysms or aortic dissections; as well as the high blood pressure in the aorta, which can easily cause the purse-string suture to tear and damage the aortic wall, and cannula dislodgement.
[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0009] An aortic cannulation includes a cannulation body and further includes:
[0010] Positioning balloon one is placed on the outside of the cannula body and located on the outer side of the aortic adventitia of the aortic wall;
[0011] Positioning balloon two is placed on the outside of the cannula body and located inside the aortic intima of the aortic wall;
[0012] The connecting hose is located on the outside of the cannula body and is connected to both positioning airbag one and positioning airbag two, and is compatible with the syringe.
[0013] In a preferred embodiment, both the first positioning airbag and the second positioning airbag are disposed on the outer side of the tip of the cannula body.
[0014] In a preferred embodiment, both the positioning airbag one and the positioning airbag two are connected to an inflation conduit disposed within the cannula body. The other end of the inflation conduit penetrates the side wall of the cannula body, and a threaded connector is provided at the end of the inflation conduit extending out of the side wall of the cannula body.
[0015] In a preferred embodiment, the inflation conduit is disposed within the cannula body on the side facing the cannula tip bend, and the threaded connector is located on the side facing the cannula tip bend.
[0016] In a preferred embodiment, one end of the connecting hose is provided with a threaded cap that is threadedly connected to a threaded connector, and the other end of the connecting hose is provided with a self-closing connector that is compatible with a syringe.
[0017] In a preferred embodiment, a pressure relief device is also provided on the connecting hose.
[0018] In a preferred embodiment, the self-closing connector cap includes an outer shell, within which a sealing cavity and a limiting cavity are provided that communicate with each other. The other end of the sealing cavity is connected to a connecting hose, and a sealing core is movably disposed within the sealing cavity by a spring.
[0019] In a preferred embodiment, the spring is disposed within the sealed cavity on the side near the limiting cavity.
[0020] In a preferred embodiment, both the sealing core and the sealing cavity are matched conical structures, and the small end of the sealing cavity is connected to the limiting cavity.
[0021] In a preferred embodiment, the limiting cavity matches the liquid delivery end of the syringe.
[0022] Compared with the prior art, this utility model provides an aortic cannulation method with the following features:
[0023] Beneficial effects:
[0024] 1. By placing positioning balloon one and positioning balloon two on the outside of the cannula body, they can be pressed tightly against the inner and outer sides of the aortic adventitia during use, preventing high-pressure blood flow from entering the aortic lumen and causing problems such as aortic dissection or pseudoaneurysm; at the same time, when the cannula body needs to be removed from the cardiopulmonary bypass for extubation, by completely releasing the gas in positioning balloon two and then pulling out the cannula body, positioning balloon one can block the blood flow, which can effectively protect the operator.
[0025] 2. The self-closing connecting cap ensures stable pressure within the positioning airbags (both one and two) during the use of the cannula after inflation, guaranteeing the stability and safety of the cannula. This solves the problems of traditional aortic cannulation, which can easily damage the aortic wall structure, leading to pseudoaneurysms or aortic dissections, as well as the high blood pressure within the aorta, which can cause purse-string suture tearing and damage to the aortic wall, and cannula dislodgement. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0027] Figure 1 This is a diagram showing the current usage status of aortic cannulation.
[0028] Figure 2 This is a diagram showing the usage state of the aortic cannulation of this utility model;
[0029] Figure 3 This is a schematic diagram of the aortic cannulation structure of this utility model;
[0030] Figure 4 This utility model Figure 2A magnified view of a section at point A in the middle;
[0031] Figure 5 This is a schematic diagram of the connecting hose of this utility model;
[0032] Figure 6 This utility model Figure 5 A magnified view of a section at point B in the middle.
[0033] [Explanation of Key Component Symbols]
[0034] 1. Aortic wall; 2. Cannula body; 3. Positioning balloon one; 4. Positioning balloon two; 5. Connecting tubing; 6. Self-closing connecting cap; 61. Outer shell; 62. Sealing core; 63. Spring; 64. Sealing cavity; 65. Limiting cavity; 7. Syringe; 8. Inflation catheter; 9. Threaded connector; 10. Threaded tower cap; 11. Pressure relief device. Detailed Implementation
[0035] The structure of the aortic cannula will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.
[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0040] As per the instruction manual Figures 1-6 As shown, this utility model provides a technical solution:
[0041] An aortic cannula includes a cannula body 2, a positioning balloon 3, a positioning balloon 2 4, and a connecting tubing 5; wherein:
[0042] Both the positioning airbag 3 and the positioning airbag 4 are fixedly installed on the outside of the cannula body 2, with the positioning airbag 3 located on the outer side of the aortic adventitia of the aortic wall 1 and the positioning airbag 4 located on the inner side of the aortic intima of the aortic wall 1.
[0043] The connecting hose 5 is located on the outside of the insertion body 2, and is connected to both the positioning airbag 3 and the positioning airbag 4, and is compatible with the syringe 7.
[0044] It should be noted that both the positioning airbag 3 and the positioning airbag 4 are located on the outer side of the tip of the cannula body 2. In use, by inflating the positioning airbags 3 and 4, they can compress the three-layer structure of the aortic wall 1 at the cannula insertion site of the cannula body 2, preventing high-pressure blood flow from entering the aortic lumen and causing problems such as aortic dissection or pseudoaneurysm. At the same time, when the cannula body 2 needs to be removed from extracorporeal circulation for extubation, the air in the positioning airbag 4 is completely released, and then the cannula body 2 is pulled out. The positioning airbag 3 can block the ejected blood flow.
[0045] It should be noted that both the positioning airbag 3 and the positioning airbag 4 are in a deflated state before insertion into the cannula body 2, and their outer surfaces are smooth, making insertion easy. After the positioning airbag 3 and the positioning airbag 4 are inflated, they can prevent the cannula from dislodging and reduce the force of the aortic purse-string liner on the aortic wall 1, thus protecting the aortic wall 1.
[0046] In a preferred embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the positioning airbag 3 and the positioning airbag 4 are respectively connected to the inflation conduit 8 provided in the intubation body 2, and are used to inflate the positioning airbag 3 and the positioning airbag 4 through the inflation conduit 8. The other end of the inflation conduit 8 penetrates the side wall of the intubation body 2, and a threaded connector 9 is provided at the end of the inflation conduit 8 that extends out of the side wall of the intubation body 2.
[0047] It should be noted that the inflation catheter 8 is located inside the cannula body 2 on the side facing the cannula tip bend 21, and the threaded connector 9 is located on the side facing the cannula tip bend 21, so that it is aligned with the direction of the cannula tip bend 21, which facilitates the identification of blood flow direction; at the same time, placing the inflation catheter 8 inside the cannula body 2 can save space and facilitate the handling and use of the cannula body 2.
[0048] In a preferred embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, one end of the connecting hose 5 is provided with a threaded cap 10 that is threadedly connected to the threaded connector 9, and the other end of the connecting hose 5 is provided with a self-closing connector 6 that matches the syringe 7; and a pressure relief device 11 is also provided on the pipeline of the connecting hose 5. In use, the pressure relief device 11 is used to release the pressure of the positioning airbag 3 and the positioning airbag 4. After the pressure is released, the exhaust pipe of the pressure relief device 11 is sealed with a sealing cap.
[0049] Specifically, such as Figure 5 and Figure 6 As shown, the self-closing connecting cap 6 includes an outer shell 61, and a sealing cavity 64 and a limiting cavity 65 that are interconnected are provided in the outer shell 61. The other end of the sealing cavity 64 is connected to the connecting hose 5, and a sealing core 62 is movably installed in the sealing cavity 64 by means of a spring 63. The spring 63 is fixedly installed in the sealing cavity 64 on the side near the limiting cavity 65.
[0050] In the above description, the sealing core 62 and the sealing cavity 64 are matched conical structures, and the small end of the sealing cavity 64 is connected to the limiting cavity 65. Therefore, in use, under the action of the spring 63, the sealing core 62 is normally located inside the sealing cavity 64 near the limiting cavity 65, and is in close contact with the inner wall of the sealing cavity 64, thus sealing the sealing cavity 64. The limiting cavity 65 matches the liquid dispensing end of the syringe 7. Therefore, when using the syringe 7 to dispense liquid into the positioning airbag 3 and the positioning airbag 4... During inflation, the gas pressure causes the sealing core 62 to move towards the connecting hose 5, simultaneously compressing the spring 63. Gas enters the connecting hose 5, causing the positioning airbags 3 and 4 to expand and become positioned. After the syringe 7 is removed, the sealing core 62 returns to its original position under the action of the spring 63, pressing against the inner wall of the sealing cavity 64 to seal the cavity. This prevents the pressure inside the positioning airbags 3 and 4 from decreasing during use, which would affect the fixation of the cannula body 2.
[0051] The implementation principle of the aortic cannulation described in this utility model is as follows: Initially, both the positioning balloon 3 and the positioning balloon 4 are uninflated. The elbow 21 of the cannula tip 2 is passed through the aortic wall 1, allowing the elbow 21 to enter the vascular lumen. When the positioning balloon 4 is located inside the aortic intima of the aortic wall 1, two syringes 7 are used to inflate the positioning balloons 3 and 4 respectively, causing them to expand and thus positioning the cannula body 2. After use, when the cannula body 2 needs to be removed from extracorporeal circulation for extubation, the gas inside the positioning balloon 4 is completely released by opening the pressure relief cap 11 on the corresponding connecting hose 5. Then, the cannula body 2 is pulled out. The positioning balloon 3 can prevent blood from gushing out. Finally, the pressure relief cap 11 on the corresponding connecting hose 5 is opened to release the gas from the positioning balloon 3.
[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.
Claims
1. An aortic cannula, comprising a cannula body (2), characterized in that: Also includes: Positioning balloon 1 (3) is placed on the outside of the cannula body (2) and located on the outside of the aortic adventitia of the aortic wall (1); Positioning balloon 2 (4) is placed on the outside of the cannula body (2) and located inside the aortic intima of the aortic wall (1); The connecting hose (5) is located on the outside of the cannula body (2), and is connected to both the first positioning airbag (3) and the second positioning airbag (4), and is compatible with the syringe (7).
2. The aortic cannulation method as described in claim 1, characterized in that: Both the positioning airbag one (3) and the positioning airbag two (4) are located on the outside of the tip of the cannula body (2).
3. The aortic cannulation method as described in claim 1, characterized in that: The positioning airbag one (3) and positioning airbag two (4) are respectively connected to the inflation conduit (8) set in the cannula body (2). The other end of the inflation conduit (8) penetrates the side wall of the cannula body (2), and a threaded connector (9) is provided at the end of the inflation conduit (8) that extends out of the side wall of the cannula body (2).
4. The aortic cannulation method as described in claim 3, characterized in that: The inflation conduit (8) is located inside the cannula body (2) on the side facing the cannula tip bend (21), and the threaded connector (9) is located on the side facing the cannula tip bend (21).
5. The aortic cannulation method as described in claim 3, characterized in that: One end of the connecting hose (5) is provided with a threaded cap (10) which is threadedly connected to the threaded connector (9), and the other end of the connecting hose (5) is provided with a self-closing connecting cap (6), which is matched with the syringe (7).
6. The aortic cannulation method as described in claim 5, characterized in that: A pressure relief device (11) is also installed on the pipeline of the connecting hose (5).
7. The aortic cannulation method as described in claim 5, characterized in that: The self-closing connecting cap (6) includes an outer shell (61), and a sealing cavity (64) and a limiting cavity (65) that are interconnected are provided in the outer shell (61). The other end of the sealing cavity (64) is connected to the connecting hose (5), and a sealing core (62) is movably provided in the sealing cavity (64) by a spring (63).
8. The aortic cannulation method as described in claim 7, characterized in that: The spring (63) is located inside the sealing cavity (64) on the side near the limiting cavity (65).
9. The aortic cannulation method as described in claim 7, characterized in that: The sealing core (62) and the sealing cavity (64) are both matching conical structures, and the small end of the sealing cavity (64) is connected to the limiting cavity (65).
10. An aortic cannulation as described in claim 7, characterized in that: The limiting cavity (65) is matched with the liquid dispensing end of the syringe (7).