CN210301301U - Fontan circulation auxiliary system based on venturi effect - Google Patents

Abstract

The utility model relates to a Venturi effect based Fontan circulation auxiliary system, which comprises a main pipe, a sewing ring and an insertion pipe; the main body pipe is integrally tubular, and the pipe diameter of the head part of the main body pipe is gradually reduced; a suture ring is fixedly connected to the opening of the head part of the main body pipe; the sewing ring is in a circular ring shape, one end of the sewing ring is connected with the head part of the main body pipe in a sealing way, and the other end of the sewing ring is connected with the inserting pipe in a sealing way; the insertion tube is in a circular tube shape; the tail pipe orifice of the main body pipe is fixedly connected with a sewing ring, one end of the sewing ring is hermetically connected with the tail part of the main body pipe, and the other end of the sewing ring is hermetically connected with an inserting pipe. Its advantages are: the utility model can reduce the pressure of superior and inferior vena cava, increase the flow of pulmonary circulation and improve Fontan hemodynamics by applying the Venturi tube; the incidence of postoperative complications of Fontan patients is reduced, and the long-term survival rate of the patients is improved.

Description

Fontan circulation auxiliary system based on venturi effect

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a Fontan circulation auxiliary system based on venturi effect.

Background

Right atrial erection (Fontan) is currently the only treatment for functional single ventricles by draining the blood from the superior and inferior vena cava directly into the pulmonary artery, without the "pumping" action of the right ventricle. Although the operation result is obviously improved after a plurality of improvements, the long-term survival rate after the operation is not good enough, almost all patients have complications such as pleural effusion, pericardial effusion, protein-losing enteropathy, liver and kidney failure, heart failure and the like, more than half of patients need heart transplantation, and the life quality and the life span are far lower than those of normal people. The underlying reason is the lack of right ventricular pumping, i.e., the lack of energy supply to the pulmonary circulation, of Fontan surgery.

Therefore, there is an urgent need for a device to improve the right ventricular pumping action, i.e., the pulmonary circulation energy supply, in the Fontan surgery.

Chinese patent documents: CN207520763U, published: 2018.06.22, discloses a high-efficiency blowback system with Venturi effect; the converging and ejecting pipe comprises a saddle-shaped top plate and a converging and ejecting pipe obliquely connected with the saddle-shaped top plate, the converging and ejecting pipe comprises a frustum-shaped pipe and a cylindrical pipe, the frustum-shaped pipe and the cylindrical pipe are coaxial, the direction of a gas jet orifice is in the same straight line with the axes of the frustum-shaped pipe and the cylindrical pipe, the oblique cutting plane of the cylindrical pipe and the saddle-shaped top plate is an ellipse, and the gas jet orifice is fixed at the intersection point of the axis of the cylindrical pipe and the ellipse.

Chinese patent documents: CN102641525A, published: 2012.08.22, discloses a multipurpose extracorporeal double-ventricle circulation-assisted pulsation type blood pump, which comprises a program-controlled linear reciprocating double-pump-chamber extruder, a left spherical pump chamber, a right spherical pump chamber, an auxiliary output and input interface, an external control valve synchronous regulation control part and a hand-operated driving assembly, wherein the left spherical pump chamber and the right spherical pump chamber are driven and extruded by the program-controlled linear reciprocating pump-chamber extruder, and the external control valve is regulated and operated by the external control valve synchronous regulation control part. The hand-operated driving assembly is arranged at the rear side of the linear reciprocating double-pump-chamber squeezer.

However, no report is yet found about the venturi effect-based Fontan circulation auxiliary system of the present invention.

Disclosure of Invention

The utility model aims at providing a Fontan circulation auxiliary system based on venturi effect.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a Venturi-based Fontan circulation assistance system comprises a main pipe (1), a suture ring (2) and an insertion pipe (3); the main body pipe (1) is tubular as a whole, and the pipe diameter of the head of the main body pipe (1) is gradually reduced; a suture ring (2) is fixedly connected to the opening of the head of the main body pipe (1); the sewing ring (2) is annular, one end of the sewing ring (2) is hermetically connected with the head of the main body pipe (1), and the other end of the sewing ring is hermetically connected with the inserting pipe (3); the insertion tube (3) is in a circular tube shape; the tail pipe orifice of the main body pipe (1) is fixedly connected with a sewing ring (2), one end of the sewing ring (2) is connected with the tail of the main body pipe (1) in a sealing mode, and the other end of the sewing ring is connected with an inserting pipe (3) in a sealing mode.

The Venturi effect based Fontan circulation auxiliary system is of an integrally formed structure.

The invention has the advantages that:

1. the utility model discloses the application of venturi pipeline can reduce upper and lower vena cava pressure, increases the lung circulation flow, improves Fontan haemodynamics.

2. The utility model discloses reduce the incidence of the postoperative complication of Fontan patient, improve patient's long-term survival rate.

Drawings

FIG. 1 is a first structural schematic diagram of a Venturi effect based Fontan circulation auxiliary system.

FIG. 2 is a schematic structural diagram II of a Venturi effect-based Fontan circulation auxiliary system.

FIG. 3 is a cross-sectional view of a Venturi-based Fontan cycle assist system.

FIG. 4 is a schematic diagram of the use of a Venturi effect based Fontan cycle assist system.

FIG. 5 is a plan view of a Venturi effect based Fontan cycle assist system.

Fig. 6 is a partially enlarged view of a portion a in fig. 5.

FIG. 7 is a cross-sectional view of another venturi-based Fontan cycle assist system.

Detailed Description

The invention will be further described with reference to the following examples and with reference to the accompanying drawings.

The reference numerals and components referred to in the drawings are as follows:

1. main body pipe

2. Suture ring

3. Insertion tube

4. Superior vena cava

5. Inferior vena cava

6. Right pulmonary artery

7. Left pulmonary artery

8. Ascending aorta

9. Descending aorta

10. Suture line

11. Upper end pipe

12. Lower end pipe

13. Insertion opening

Example 1

Referring to fig. 1, fig. 1 is a first schematic structural diagram of a venturi-effect-based Fontan circulation auxiliary system according to this embodiment. The Venturi-effect-based Fontan circulation auxiliary system comprises a main pipe (1), a suture ring (2) and an insertion pipe (3);

referring to fig. 2, fig. 2 is a schematic structural diagram of a venturi effect-based Fontan circulation auxiliary system of the present embodiment. The main body pipe (1) is tubular as a whole, and the pipe diameter of the head of the main body pipe (1) is gradually reduced; a suture ring (2) is fixedly connected to the opening of the head of the main body pipe (1); the sewing ring (2) is annular, one end of the sewing ring (2) is hermetically connected with the head of the main body pipe (1), and the other end of the sewing ring is hermetically connected with the inserting pipe (3); the insertion tube (3) is in a circular tube shape; the tail pipe orifice of the main body pipe (1) is fixedly connected with a sewing ring (2), one end of the sewing ring (2) is connected with the tail of the main body pipe (1) in a sealing mode, and the other end of the sewing ring is connected with an inserting pipe (3) in a sealing mode.

Referring to fig. 3, fig. 3 is a sectional view of a venturi effect based Fontan circulation assistance system according to the present embodiment. The Venturi effect based Fontan circulation auxiliary system is of an integrally formed structure.

Example 2

Referring to fig. 7, fig. 7 is a sectional view of another venturi-based Fontan circulation assistance system of this embodiment.

The venturi effect based Fontan circulation assistance system described in this example is substantially the same as the venturi effect based Fontan circulation assistance system described in example 1, except for the main tube (1).

The Venturi-effect-based Fontan circulation auxiliary system comprises a main pipe (1), a suture ring (2) and an insertion pipe (3);

the main body pipe (1) is integrally tubular, and the main body pipe (1) consists of an upper end pipe (11) and a lower end pipe (12); a sewing ring (2) is fixedly connected to the upper end pipe orifice of the upper end pipe (11), and an insertion opening (13) is formed in the lower end pipe orifice of the upper end pipe (11); the lower end pipe (12) is inserted into the insertion opening (13); the upper end pipe orifice of the lower end pipe (12) is inserted into the insertion opening (13), and the lower end pipe diameter of the lower end pipe (12) is gradually reduced; a lower end pipe orifice of the lower end pipe (12) is fixedly connected with a sewing ring (2); one end of the sewing ring (2) is hermetically connected with the lower end pipe orifice of the lower end pipe (12), and the other end of the sewing ring is hermetically connected with the inserting pipe (3);

the length of the main body tube (1) can be adjusted, and the main body tube can be suitable for different patients.

Example 3

Referring to fig. 4, 5 and 6, fig. 4 is a schematic diagram of a venturi effect based Fontan circulation auxiliary system, fig. 5 is a plan view of the venturi effect based Fontan circulation auxiliary system, and fig. 6 is a partially enlarged view of a portion a in fig. 5.

It should be noted that: the venturi effect (venturi effect) refers to an effect that causes a reduction in the hydrostatic pressure of a portion of the fluid as it passes through a narrow section of a pipe. In the principle of continuity of fluid mechanics, the flow rate of incompressible fluid increases as it passes through the constriction, while its static pressure decreases according to the principle of conservation of mechanical energy. According to this principle, we intend to introduce a small amount of arterial blood with high mechanical energy into the Fontan surgical anastomosis site, bringing low-energy venous blood back into the pulmonary artery. This research carries out three-dimensional reconstruction to the chamber lung anastomosis region of Fontan postoperative infant patient to add on this basis and use the utility model discloses a device.

The usage process and the method of the Venturi effect-based Fontan circulation auxiliary system are as follows:

firstly, an insertion tube (3) at the head of a main tube (1) is inserted into a position where a superior vena cava (4), an inferior vena cava (5), a right pulmonary artery (6) and a left pulmonary artery (7) intersect, and then a suture ring (2) at the head of the main tube (1) is sutured to the intersected position through a suture (10); the insertion tube (3) at the tail part of the main tube (1) is inserted into the ascending aorta (8), and then the suture ring (2) at the tail part of the main tube (1) is sewed on the ascending aorta (8) through a suture (10).

When blood in the ascending aorta (8) flows into a junction part through the main body pipe (1), the blood flow speed is higher because the pipe diameter of the head part of the main body pipe (1) is smaller; the pressure outlet of the head of the main pipe (1) is smaller according to the Venturi effect. Thereby assisting venous blood to flow back to the pulmonary circulation and forming a right ventricle-like effect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.

Claims (1)

1. A Venturi-based Fontan circulation auxiliary system is characterized by comprising a main body pipe (1), a suture ring (2) and an insertion pipe (3); the main body pipe (1) is tubular as a whole, and the pipe diameter of the head of the main body pipe (1) is gradually reduced; a suture ring (2) is fixedly connected to the opening of the head of the main body pipe (1); the sewing ring (2) is annular, one end of the sewing ring (2) is hermetically connected with the head of the main body pipe (1), and the other end of the sewing ring is hermetically connected with the inserting pipe (3); the insertion tube (3) is in a circular tube shape; a sewing ring (2) is fixedly connected at the tail pipe orifice of the main body pipe (1), one end of the sewing ring (2) is hermetically connected with the tail of the main body pipe (1), and the other end of the sewing ring is hermetically connected with an inserting pipe (3); the Venturi effect based Fontan circulation auxiliary system is of an integrally formed structure.

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