CN211434648U - Single-channel arterial cannula for left heart assistance - Google Patents
Single-channel arterial cannula for left heart assistance Download PDFInfo
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- CN211434648U CN211434648U CN201921351575.2U CN201921351575U CN211434648U CN 211434648 U CN211434648 U CN 211434648U CN 201921351575 U CN201921351575 U CN 201921351575U CN 211434648 U CN211434648 U CN 211434648U
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Abstract
The utility model provides a single-channel arterial cannula for left heart assistance, which comprises a blood drawing pipe fitting, a blood transfusion pipe fitting and a combination tee joint; the combination tee is sleeved outside the blood drawing pipe fitting, and one end of the blood transfusion pipe fitting is nested inside the combination tee; the blood transfusion pipe fitting is sleeved on the outer side of the circumference of the blood drawing pipe fitting, a gap is formed between the blood transfusion pipe fitting and the blood drawing pipe fitting, and the length of the blood drawing pipe fitting is larger than that of the blood transfusion pipe fitting. The utility model discloses a be used for the supplementary single channel artery intubate of left side heart to make and draw the blood pipe fitting and all walk a passageway with the blood transfusion pipe fitting, avoid the secondary intubate, reduce the probability of infecting and complication, only need once implant, alright in order to realize drawing the function of blood and blood transfusion.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, in particular to a single channel artery intubate for left heart is supplementary.
Background
Heart failure is the terminal stage of development of all cardiovascular diseases, and with the increase of the current incidence rate of cardiovascular diseases, the incidence rate of heart failure is increased, and the mortality rate of heart failure is equivalent to that of malignant tumors. Cardiac failure is also dominated by left heart failure, and end-stage left heart failure, such as extracorporeal membrane oxygenation (ECMO), is currently treated clinically with mechanical circulatory aids.
ECMO utilizes two cannulas, one of which draws venous blood out of the body and the other of which feeds oxygenated arterial blood back into the aorta, to achieve the function of partially replacing the lung and the heart, and ECMO needs to be expensive, and the patient is subjected to too much pressure and bears great economic pressure. Because of the presence of the two cannulae, the patient is required to sustain secondary injuries and the chances of infection and complications increase.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model relates to a single-channel arterial cannula for left heart assistance,
comprises a blood drawing pipe fitting, a blood transfusion pipe fitting and a combined tee joint;
the combination tee is sleeved outside the blood drawing pipe fitting, and one end of the blood transfusion pipe fitting is nested inside the combination tee;
the blood transfusion pipe fitting is sleeved on the outer side of the circumference of the blood drawing pipe fitting, a gap is formed between the blood transfusion pipe fitting and the blood drawing pipe fitting, and the length of the blood drawing pipe fitting is larger than that of the blood transfusion pipe fitting.
Preferably, two openings in the combination tee are arranged on a straight line to form a straight pipe with two open ends, and a third opening is arranged on the outer side of the circumference of the straight pipe.
Preferably, one port of the blood transfusion tube member is communicated with a third port on the combining tee.
Preferably, a plurality of bleeding holes are formed in the side wall of the blood transfusion tube, a plurality of blood inlet holes are formed in the side wall of one end of the blood drawing tube, and a soft tip is arranged at one end, close to the blood inlet holes, of the blood drawing tube.
Preferably, one end of the blood drawing pipe fitting, which is far away from the blood inlet hole, is provided with a connecting part.
Preferably, the soft tip comprises a top opening and a bottom opening, and the bottom opening on the soft tip is connected with the blood drawing pipe fitting.
Preferably, the blood drawing tube and the blood transfusion tube are both made of blood compatible material, and the inner diameter of the blood transfusion tube is larger than the outer diameter of the blood drawing tube.
The technical advantages of the utility model: the utility model discloses a be used for the supplementary single channel artery intubate of left side heart to make and draw the blood pipe fitting and all walk a passageway with the blood transfusion pipe fitting, avoid the secondary intubate, reduce the probability of infecting and complication, only need once implant, alright in order to realize drawing the function of blood and blood transfusion.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic view of the whole structure of the arterial cannula of the present invention;
FIG. 2 is a schematic view of the delivery device of the present invention connected to an arterial cannula;
in the figure: 1-blood drawing tube, 2-blood transfusion tube, 3-bleeding hole, 4-soft tip, 5-blood inlet, 6-combined three-way and 7-connecting part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows the overall structure of the arterial cannula according to the present invention. As shown in fig. 1, a single-channel arterial cannula for left heart assist comprises a blood drawing tube 1, a blood transfusion tube 2 and a junction tee 6. The combination tee 6 is sleeved on the outer side of the blood drawing pipe fitting 1, one end of the blood transfusion pipe fitting 2 is nested on the inner side of the combination tee 6, the blood drawing pipe fitting 1 is sleeved inside the blood transfusion pipe fitting 2, and the length of the blood drawing pipe fitting 1 is larger than that of the blood transfusion pipe fitting 2. Illustratively, when the arterial cannula is inserted into the artery, that is, a part of the arterial cannula where the blood drawing tube 1 and the blood transfusion tube 2 are overlapped is inserted into the artery, wherein one end of the blood drawing tube 1 inserted into the arterial blood vessel crosses the aortic valve to enter the left ventricle, the blood drawing tube 1 is used for drawing arterial blood in the left ventricle, and the blood transfusion tube 2 is used for discharging the drawn arterial blood. Draw blood pipe fitting 1 and blood transfusion pipe fitting 2 and all walk same artery passageway, and then can set up an opening, insert artery intubate inside the artery, avoid the secondary intubate, reduce the probability of infection and complication.
Two openings set up on a straight line in combining tee bend 6, form a both ends open-ended straight tube, and the third opening sets up in the circumference outside of straight tube, and the slope of third opening sets up, forms type "Y" type structure. The straight tube cup joints in drawing blood pipe fitting 1 circumference outside, and inside blood transfusion pipe fitting 2 one end card goes into an opening of straight tube, combine the third opening on the tee bend 6 and communicate with blood transfusion pipe fitting 2. The blood transfusion tube 2 is only wrapped on the circumference outside the blood drawing tube 1, and the blood transfusion tube 2 is not communicated with the blood drawing tube 1.
The blood drawing pipe fitting 1 and the blood transfusion pipe fitting 2 can be arranged as coaxial double-cavity pipe fittings, wherein one port of the blood transfusion pipe fitting 2 is connected with the straight pipe of the combination tee joint 6, so that one port of the blood transfusion pipe fitting 2 is communicated with the third through port of the combination tee joint 6 through the straight pipe. The other port of the blood transfusion pipe 2 is sleeved on the blood drawing pipe 1. Illustratively, the inner diameter of the blood drawing tube member 1 may be set to 2.12mm, and the wall thickness may be 0.2 mm; the blood transfusion tube 2 may be set to 5.6mm in inner diameter and 0.2mm in wall thickness. The blood drawing tube 1 and the blood transfusion tube 2 need special treatment, such as surface smoothing treatment, to prevent the damage of the vessel wall when the catheter enters the aorta in the retrograde process.
Illustratively, the straight tube of the junction tee 6 is merely illustrated as an example, and does not limit the specific shape of the junction tee 6. Combine tee bend 6 to cup joint on blood drawing pipe fitting 1 and blood transfusion tube spare 2, the inseparable cup joint of an opening of straight tube is in the circumference outside of blood drawing pipe fitting 1, and an opening of straight tube and the inseparable seamless of junction of blood drawing pipe fitting 1, the inseparable cup joint of the second opening of straight tube is in the circumference outside of blood transfusion tube spare 2, and the inseparable seamless of the second opening of straight tube and the junction of blood transfusion tube spare 2 to avoid blood to draw the junction of blood pipe fitting 1 and straight tube and the junction of straight tube and blood transfusion tube spare 2 to flow. The blood drawing pipe fitting 1 and the blood transfusion pipe fitting 2 are not necessarily arranged in a straight line shape, and the blood drawing pipe fitting 1 and the blood transfusion pipe fitting 2 can be bent without influencing the combination of the combination tee 6, the blood drawing pipe fitting 1 and the blood transfusion pipe fitting 2. Wherein, the blood drawing tube part 1 and the blood transfusion tube part 2 are both made of blood compatible materials, and blood can not be solidified on the tube walls of the blood drawing tube part 1 and the blood transfusion tube part 2. The blood-compatible material is merely exemplified and not limited to the blood-compatible material, and for example, TPU (polyurethane for medical use) can also ensure blood compatibility.
The inner diameter of the blood transfusion pipe fitting 2 is larger than the outer diameter of the blood drawing pipe fitting 1, so that a certain gap is formed between the blood transfusion pipe fitting 2 and the blood drawing pipe fitting 1, and blood can flow in the blood transfusion pipe fitting 2 conveniently. In this case, it is necessary to provide a sufficient flow space for arterial blood, and when blood flows through the blood drawing tube 1 and the blood transfusion tube 2, the substance in the blood is prevented from blocking the arterial cannula, so that the blood transfusion tube 2 is safely implanted into the arterial blood tube under the condition of normal blood transportation. When the blood transfusion tube 2 is implanted into the arterial blood vessel, if the outer wall of the blood transfusion tube 2 is in close contact with the inner wall of the arterial blood vessel, the blood inside the blood transfusion tube 2 cannot be discharged through the bleeding hole 3, and when the blood is discharged through the blood transfusion tube 2, the blood can move only in the direction in which the blood transfusion tube 2 is discharged, thereby blocking the circulation of the blood to the limbs of the whole body.
Fig. 2 shows a schematic structural view of the delivery device connecting with the arterial cannula. As shown in fig. 2, the third port of the junction tee 6 is externally connected to a transfer device, and the blood to be drawn is transferred into the junction tee 6 by the transfer device. Because the third opening communicates with blood transfusion tube spare 2, and then blood gets into blood transfusion tube spare 2 through combining tee bend 6, and then blood flows into the artery through blood transfusion tube spare 2, accomplishes the transmission effect to blood. And the blood compatible blood drawing pipe fitting 1 and the blood transfusion pipe fitting 2 avoid the coagulation of blood and can also reduce the damage to the internal substances of the blood.
The blood transport device can provide sufficient power for blood circulation while ensuring that the degree of blood destruction meets standards. Illustratively, the delivery device is to ensure that the circulation flow of the body blood is adjustable within a range of 2.0-4.0L/min, wherein 2.0-4.0L/min is the normal circulation of the body blood of a normal person, so that the delivery device is required to ensure the circulation effect of blood transportation, and simultaneously, the delivery device is not allowed to excessively damage substances in the blood. The conveying device is arranged outside the body, and conveys the blood oxygenated in the left ventricle to the arterial blood vessel in an extracorporeal circulation mode without conveying the blood to the arterial blood vessel after oxygenation, so that the cost required by blood circulation is reduced.
The side wall of the blood transfusion pipe fitting 2 is provided with a plurality of bleeding holes 3. Illustratively, the pore diameter of the bleeding pores 3 may be defined. That is, when the flow rate of the blood conveyed by the conveying device is constant, the aperture of the bleeding hole 3 is too small, and the flow rate of the blood sprayed through the bleeding hole 3 is increased, so that the blood vessel is damaged; if the diameter of the bleeding hole 3 is too large, the bleeding holes 3 at other positions farther from the junction tee 6 cannot discharge proper blood, thereby affecting the normal transportation of blood.
The positions of the plurality of bleeding holes 3 may be set in which it is ensured that the blood inside the blood transfusion tube member 2 can be discharged completely through the bleeding holes 3 into the arterial blood vessel, and then the hole diameter and density of the bleeding holes 3 are normal. Illustratively, blood inside the blood transfusion tube 2 is discharged from the bleeding hole 3 into the arterial blood vessel, and the direction of travel of the blood inside the blood transfusion tube 2 corresponds to the size of the bleeding hole 3. The diameter of the bleeding holes 3 can be designed to be small to large in the direction of blood travel inside the blood transfusion tube 2, and the density of the bleeding holes 3 can be designed to be low to high in the direction of blood travel inside the blood transfusion tube 2.
For example, if the diameter of the bleeding hole 3 is larger than the diameter of the normal bleeding hole 3, the blood inside the blood transfusion tube 2 will be discharged through the bleeding hole 3 near the junction tee 6, and the bleeding hole far from the junction tee 6 may not discharge the blood, which may cause the arterial blood to not travel to the branch of the blood vessel. If the diameter of the bleeding hole 3 is smaller than the diameter of the bleeding hole 3 in the normal state, the amount of blood discharged from the blood transfusion tube 2 through the bleeding hole 3 is too small, and arterial blood may not sufficiently flow to the branch of the blood vessel, resulting in insufficient blood supply.
If the density of the bleeding holes 3 on the blood transfusion tube 2 near the combining tee 6 is greater than that of the bleeding holes 3 in the normal state, the blood inside the blood transfusion tube 2 will be discharged through the bleeding holes 3 near the combining tee 6, and the bleeding holes 3 far from the combining tee 6 may not discharge the blood, so that the arterial blood may not run to the branch of the blood vessel. If the density of the bleeding holes 3 on the blood transfusion tube 2 near the combining tee 6 is less than that of the bleeding holes 3 in the normal state, the discharge amount of the blood inside the blood transfusion tube 2 through the bleeding holes 3 is too small, and the arterial blood can not fully run to the branch of the blood vessel, thereby causing insufficient blood supply.
The side wall of one end of the blood drawing tube part 1 is provided with a blood inlet hole 5. One end of the blood drawing pipe fitting 1 close to the blood inlet hole 5 is provided with a soft tip 4, one end of the blood drawing pipe fitting 1 far away from the blood inlet hole 5 is provided with a connecting part 7, and the connecting part 7 and the soft tip 4 are respectively arranged at the end parts of two sides of the blood drawing pipe fitting 1. The blood drawing tube member 1 is communicated with the input end of the conveying device through the connecting part 7, the third opening on the combining tee joint 6 is externally connected with the output end of the conveying device, so that the conveying device can draw the arterial blood inside the left ventricle through the blood inlet hole 5 and the soft tip 4 on the blood drawing tube member 1, then the conveying device can input the drawn arterial blood into the blood transfusion tube member 2 through the third opening on the combining tee joint 6, and the arterial blood is discharged into the artery through the blood outlet hole 3 on the blood transfusion tube member 2 and the opening of the blood transfusion tube member 2.
Illustratively, the left ventricle auxiliary device is formed by connecting an arterial cannula with a conveying device, namely, the third port of the three-way valve 6 is externally connected with the output end of the conveying device, the blood drawing tube 1 is connected with the input end of the conveying device through a connecting part 7, and when the arterial cannula enters the inside of an artery of a human body, a blood circulation loop is formed. The delivery device may be provided as a blood pump, which serves merely as an example of a blood delivery device and is not limited to a blood pump, such as a blood delivery device, for example a circulation pump. Therefore, when a heart failure patient carries out blood circulation treatment through the left ventricle auxiliary device, the soft tip end 4 of the blood drawing pipe fitting 1 is inserted into the left ventricle through an arterial blood vessel, and then the conveying device operates to draw arterial blood inside the left ventricle through the soft tip end 4 of the blood drawing pipe fitting 1 and the blood inlet hole 5. After passing through the transfer device, the blood is fed into the interior of the blood transfusion tube 2 through the third port of the junction tee 6, and the arterial blood is discharged into the artery through the bleeding hole 3 in the sidewall of the blood transfusion tube 2 and the opening of the blood transfusion tube 2.
The soft tip 4 is connected with the blood drawing tube member 1, and the material of the soft tip 4 can be polyvinyl chloride. The polyvinyl chloride itself can store blood without damaging the blood, and the polyvinyl chloride is only an exemplary illustration of the material of the soft tip 4 and is not limited to polyvinyl chloride, such as TPU. Soft pointed end 4 includes top mouth and end mouth, and end mouth diameter is greater than top mouth diameter, and soft pointed end 4's section appearance sets up to isosceles trapezoid to soft pointed end 4's end mouth and bloodletting tube spare 1 intercommunication. The cornice of the top mouth of the soft tip 4 is smoothed to reduce the damage of the soft tip 4 to the arterial blood vessel.
The soft tip 4 can also be arranged in a pigtail shape, and when the soft tip 4 on the blood drawing tube member 1 is positioned in the left ventricle, the pigtail-shaped soft tip 4 can reduce the damage to the tissue in the left ventricle. The isosceles trapezoid shape and the pigtail shape of the soft tip 4 are illustrated as the soft tip 4, and the soft tip 4 is not limited to the shape.
The utility model discloses a be used for the supplementary single channel artery intubate of left side heart to make and draw blood pipe fitting 1 and blood transfusion pipe fitting 2 all walk a passageway, avoid the secondary intubate, reduce the probability of infection and complication, only need once implant, alright in order to realize drawing the function of blood and blood transfusion.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A single-channel arterial cannula for left heart assistance is characterized in that,
comprises a blood drawing pipe fitting (1), a blood transfusion pipe fitting (2) and a combined tee joint (6);
the combined tee joint (6) is sleeved outside the blood drawing pipe fitting (1), and one end of the blood transfusion pipe fitting (2) is nested inside the combined tee joint (6);
the blood transfusion pipe fitting (2) is sleeved on the outer side of the circumference of the blood drawing pipe fitting (1), a gap is formed between the blood transfusion pipe fitting (2) and the blood drawing pipe fitting (1), and the length of the blood drawing pipe fitting (1) is larger than that of the blood transfusion pipe fitting (2).
2. The single-channel arterial cannula for left heart assist according to claim 1, characterized in that two ports of the combining tee (6) are arranged on a straight line to form a straight tube with two open ends, and a third port is arranged outside the circumference of the straight tube.
3. The single-channel arterial cannula for left cardiac assist according to claim 2, characterized in that one port of the blood transfusion tube (2) communicates with a third port on the union tee (6).
4. The single-channel arterial cannula for left heart assist according to claim 3, characterized in that the side wall of the blood transfusion tube (2) is provided with a plurality of bleeding holes (3), the side wall of one end of the blood drawing tube (1) is provided with a plurality of blood inlet holes (5), and the end of the blood drawing tube (1) close to the blood inlet holes (5) is provided with a soft tip (4).
5. The single-channel arterial cannula for left heart assist according to claim 4, characterized in that the end of the blood drawing tube member (1) away from the blood inlet hole (5) is provided with a connecting part (7).
6. The single-channel arterial cannula for left heart assist according to claim 4, characterized in that the soft tip (4) comprises a top port and a bottom port, the bottom port on the soft tip (4) being connected with the blood drawing tube member (1).
7. The single-channel arterial cannula for left cardiac assist according to claim 1, characterized in that said blood drawing tube (1) and said blood transfusion tube (2) are both made of blood compatible material, the internal diameter of said blood transfusion tube (2) being larger than the external diameter of said blood drawing tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351575.2U CN211434648U (en) | 2019-08-20 | 2019-08-20 | Single-channel arterial cannula for left heart assistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351575.2U CN211434648U (en) | 2019-08-20 | 2019-08-20 | Single-channel arterial cannula for left heart assistance |
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| CN211434648U true CN211434648U (en) | 2020-09-08 |
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| CN201921351575.2U Active CN211434648U (en) | 2019-08-20 | 2019-08-20 | Single-channel arterial cannula for left heart assistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559541A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Single-channel arterial cannula for left heart assistance |
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2019
- 2019-08-20 CN CN201921351575.2U patent/CN211434648U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559541A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Single-channel arterial cannula for left heart assistance |
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