CN215995044U

CN215995044U - Pressure adjustable catheter

Info

Publication number: CN215995044U
Application number: CN202023149407.0U
Authority: CN
Inventors: 侯晓彤; 杜中涛
Original assignee: Beijing Anzhen Hospital
Current assignee: Beijing Anzhen Hospital
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2022-03-11
Anticipated expiration: 2030-12-23

Abstract

The utility model relates to the field of medical instruments, in particular to a pressure-adjustable catheter. The system aims to solve the problem that the pressure alarm of the system occurs due to the change of blood flow pressure in a loop of the existing extracorporeal membrane oxygenation system connected with a continuous kidney replacement therapy system, and change an extracorporeal membrane oxygenation auxiliary mode. The pressure adjusting device is arranged in the middle of the connecting guide pipe, one is an adjusting knob, and the lifting plate is driven to move up and down by the rotation of the lifting rod in the fixing plate, so that the blood flow is adjusted; the second type is a flow regulator, a conduit passes through the interior of the regulator, a roller is pressed on the conduit, and the rolling of the roller realizes regulation; the third type is a valve, and the sealing of the sealing ring, the upper sealing body and the lower sealing body is realized through the up-down lifting of the valve rod, so that the blood flow pressure is adjusted. In addition, one end of the catheter is provided with a luer connector male head, and the other end of the catheter is provided with a luer connector female head or a three-way luer connector, so that connection and disconnection can be more conveniently and rapidly realized.

Description

Pressure adjustable catheter

Technical Field

The utility model relates to the field of medical instruments, in particular to a pressure-adjustable catheter.

Background

The extracorporeal membrane oxygenation is mainly used for providing continuous extracorporeal respiration and circulation for a patient, when an extracorporeal membrane oxygenation system operates, blood is led out from a vein, oxygenated by a membrane lung and discharged with carbon dioxide, and the oxygenated blood can be returned to the vein and also returned to an artery so as to maintain the life of the patient. Particularly in respiratory failure caused by new coronary pneumonia, the extracorporeal membrane oxygenation system plays an important role in treating critically ill patients and reducing the disease death rate.

Continuous renal replacement therapy, a blood purification treatment technology for continuously and slowly removing water and solutes in an extracorporeal circulation blood purification manner, so as to replace the renal function. Compared with the common hemodialysis, the continuous kidney replacement therapy system prolongs the blood purification treatment time and reduces the treatment efficiency in unit time, so that the influence of the change of the solute concentration and the volume in the blood on the organism is minimized, and a filter with high permeability and good biocompatibility is adopted, thereby providing an extremely important homeostasis balance for the treatment of severe patients.

In actual patients, there are many organ failures accompanied by extracorporeal membrane oxygen patients, such as renal failure, who need continuous renal replacement therapy system therapy simultaneously with extracorporeal membrane oxygenation system therapy to treat acute renal failure and control fluid balance. In the existing treatment method, a continuous kidney replacement treatment system pipeline is used for independent treatment, and the other is that an extracorporeal membrane oxygenation system is connected with the continuous kidney replacement treatment system pipeline.

However, a serious problem of this method is that after the continuous kidney replacement therapy system is connected with the adventitia oxygenation system, because the pressure provided by the extracorporeal membrane oxygenation system is relatively high, the pressure of the continuous kidney replacement therapy system often becomes too high to trigger the pressure alarm device of the continuous kidney replacement therapy system, and then a high-pressure alarm is generated. At present, after the pressure of a catheter of an adventitia oxygenation system of a continuous kidney substitution treatment system connector exceeds the limit and a continuous kidney substitution treatment system machine gives an alarm, a clinician bends the catheter by hand so as to reduce the blood flow and reduce the pressure of the continuous kidney substitution treatment system machine, and the catheter is recovered after the pressure reaches the limit. Firstly, the normal operation treatment of doctors is seriously influenced, secondly, the simple method can not effectively control the pipe flow pressure, and the control is still high and low after the overpressure of a continuous kidney substitution treatment system machine, so that the problem can not be fundamentally solved, thirdly, the pipeline outside the continuous kidney substitution treatment system and the extracorporeal membrane oxygenation system is complicated and messy, and the current simple method is easy to touch various cannulas and equipment in operation and has medical potential safety hazards.

Therefore, in order to more conveniently, quickly and effectively control the pressure of the catheter between the continuous kidney substitution treatment system and the extracorporeal membrane oxygenation system, avoid the pressure alarm of the continuous kidney substitution treatment system machine and improve the medical safety, it is necessary to design a catheter which can connect the continuous kidney substitution treatment system and the extracorporeal membrane oxygenation system, can regulate the pressure and is convenient to insert and pull.

Disclosure of Invention

In view of the above problems, the present invention is directed to providing a pressure regulating catheter for connecting a continuous renal replacement therapy system and an extracorporeal membrane oxygenation system, which can control the blood pressure of the connecting catheter between the continuous renal replacement therapy system and the extracorporeal membrane oxygenation system, avoid alarm and failure caused by excessive pressure of the extracorporeal membrane oxygenation system, and can more conveniently plug and unplug a connecting tube, thereby reducing unnecessary time waste.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a pressure-adjustable catheter comprising a tube, characterized in that: the first interface device is communicated with the continuous kidney replacement therapy system, and the second interface device is communicated with the extracorporeal membrane oxygenation system; and a pressure adjusting device is arranged in the middle of the pipe body.

Preferably, the first interface device is a two-way luer connector male head.

Preferably, the second interface device is a multi-way connector.

Preferably, the multi-way connector is a two-way luer connector female head.

Preferably, the multi-way connector is a tee.

Preferably, the multi-way connector is a three-way luer connector. Preferably, the pressure adjusting device is an adjusting knob, the adjusting knob comprises a fixing part and an adjusting part, and the adjusting part is movably arranged on the fixing part;

the fixing piece comprises an adjusting base, a side plate and a fixing plate, the side plate is fixedly arranged on the adjusting base, the fixing plate is fixedly arranged at the upper end of the side plate, and a threaded hole is formed in the center of the fixing plate;

the adjusting piece comprises a lifting plate and a lifting rod, and the lifting plate is connected with the lifting rod through a rotating mechanism.

Preferably, the rotating mechanism comprises a rotating cover and a rotating groove, the rotating cover is rotatably arranged in the rotating groove, the rotating cover is a circular plate integrally formed with the lifting plate, and the rotating groove is an annular groove formed by matching the bottom surface of the lifting rod with the rotating cover.

Preferably, the pressure regulating device is a common flow regulator.

Preferably, the pressure regulating device is a valve, and comprises a valve rod, a sealing cover, a valve body, a rotating body, a sealing ring, an upper sealing body, a lower sealing body and a valve port, wherein the valve body is an integrally formed valve shell, the upper end of the valve body is a convergent opening cone, the middle part of the valve body is a cylinder the inner wall of which is provided with internal threads, the middle part of the lower part of the valve body is provided with the upper sealing body and the lower sealing body, the upper sealing body and the lower sealing body form an annular ring, the two ends of the lower part of the valve body are provided with cylindrical valve ports, the inner side of each valve port is fixedly connected with the outer side of the corresponding pipe body, the convergent part of the upper end of the valve body is fixedly provided with the sealing cover, the middle of the sealing cover is provided with a hole, the middle of the valve rod is provided with the integrally formed rotating body, the outer wall of the rotating body is provided with external threads matched with the internal threads of the valve body, and the sealing ring is fixedly arranged at the lower end of the middle part of the valve body, the middle of the sealing ring is provided with a small hole which can pass through the valve rod.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the pressure-adjustable catheter, the adjusting knob or the flow regulator or the valve is arranged in the middle of the catheter, so that the blood flow in the catheter can be conveniently adjusted, the pressure of a continuous renal replacement therapy system is further adjusted, and overpressure alarming of the continuous renal replacement therapy system is avoided;

2. according to the pressure-adjustable catheter, the luer connector male head is arranged at one end of the catheter, and the luer connector female head or the three-way luer connector is arranged at the other end of the catheter, so that the catheter can be connected and disconnected more conveniently and rapidly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a view showing a structure of a catheter according to example 1 of the present invention.

FIG. 2 is a view showing the structure of a catheter according to example 4 of the present invention.

Fig. 3 is a side view of an adjusting knob in embodiment 1.

Fig. 4 is a front view of an adjustment knob in embodiment 1.

Fig. 5 is a sectional view of an adjusting knob in embodiment 1.

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

FIG. 7 is a structural view of a flow rate regulator in embodiment 2.

FIG. 8 is a view showing the structure of a roller of a flow rate adjuster in embodiment 2.

Fig. 9 is a sectional view of the valve in embodiment 3.

FIG. 10 is a view showing the structure of a catheter in example 5 of the present invention.

Wherein: 1. the two-way luer connector comprises a pipe body, a two-way luer connector male head, a three-way luer connector 3, a two-way luer connector female head 4, a base 5, a side plate 6, a lifting plate 7, a fixing plate 8, a lifting rod 9, a knob cap 10, a rotating cover 11, a rotating groove 12, a regulator 13, a regulating groove 14, a roller 15, a roller 16, a hand wheel 17, a valve rod 18, a sealing cover 19, a valve body 20, a rotating body 21, a sealing ring 22, a sealing ring 23, a sealing ring 24, an upper sealing body 25, a lower sealing body 26 and a valve port.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1:

referring to the attached

drawings

1, 3, 4, 5 and 6, the pressure-adjustable catheter comprises a catheter body 1, wherein the length of the catheter body 1 is 10cm, a first interface device and a second interface device are respectively arranged at two ends of the catheter body 1, the first interface device is communicated with a continuous kidney replacement therapy system, the second interface device is communicated with a body outer membrane oxygenation system, the first interface device is a two-way luer connector male head 2, the second interface device is a luer two-way luer connector female head 4, the inner diameters of the two-way luer connector male head 2 and the two-way luer connector female head 4 are universal, and the two-way luer connector male head 2 and the two-way luer connector female head 4 are medical common luer connectors.

In this embodiment, 1 intermediate position department of body is provided with pressure adjustment device, pressure adjustment device is adjust knob, adjust knob includes mounting and regulating part, the regulating part activity sets up on the mounting.

The mounting is including adjusting base 5, curb plate 6 and fixed plate 8, adjust and fix on the base 5 and be provided with two curb plates 6, the fixed plate 8 that is provided with of up end of two curb plates 6, the central point of fixed plate 8 puts and is provided with the screw hole.

The regulating part includes lifter plate 7 and lifter 9, lifter plate 7 and lifter 9 pass through slewing mechanism and connect, lifter 9 is one and is provided with the screw pole with 8 screw-thread fit of fixed plate, the integrative fixedly connected with knob cap 10 in upper end of lifter 9, lifter 9 be one be provided with 8 screw hole complex screw poles of fixed plate, lifter 9 passes through the screw and rotates the lift in fixed plate 8.

The rotating mechanism comprises a rotating cover 11 and a rotating groove 12, the rotating cover 11 is a circular plate integrally formed with the lifting plate 7, the rotating groove 12 is an annular groove formed by matching the bottom surface of the lifting rod 9 and the rotating cover 11, the lifting rod 9 and the rotating groove 12 are integrally formed, the rotating cover 11 is rotatably arranged in the rotating groove 12 so as to rotatably connect the lifting plate 7 and the lifting rod 9,

the blood pressure adjusting device is characterized in that the space formed by the adjusting base 5, the side plates 6 and the lifting plate 7 penetrates through the tube body 1, the bottom surface of the tube body 1 is fixedly connected with the adjusting base 5 through glue, and when the blood pressure in a tube needs to be adjusted, the knob cap 10 is grabbed to rotate to drive the lifting rod 9 to rotate in the threads of the fixing plate 8, so that the lifting plate 7 is driven to lift up and down, and further the shape of the tube body 1 can be flattened or restored to adjust the blood pressure.

Example 2:

different from the embodiment 1, referring to fig. 7 and 8, the pressure adjusting device disposed at the middle position of the tube body 1 of the embodiment is a common flow regulator, the flow regulator is a medical infusion tube flow regulator, the flow regulator includes a regulator 13, an adjusting groove 14, a roller 15 and a roller 16, the regulator 13 is a rectangular groove with openings on both sides and on the upper surface, the adjusting groove 14 is disposed on both inner sides of the regulator 13, the adjusting groove 14 is a trapezoidal groove with widths of both ends decreasing from large to small, the roller 15 is disposed in the groove of the regulator 13, the roller 16 is integrally disposed on both sides of the roller 15, the roller 16 is embedded in the adjusting groove 14, the roller 16 rolls in the adjusting groove 14 to drive the roller 15 to roll, and the heights of both ends of the adjusting groove 14 are different, so that the heights of the roller 15 and the bottom surface of the regulator 13 are different, when the blood vessel pressure regulator is used, the tube body 1 penetrates through two side surfaces of the regulator 13 and between the regulator 13 and the bottom surface of the roller 15, and the rotation of the roller 15 in the regulator 13 can extrude or release the tube body 1 due to the regulation of the regulating groove 14, so that the blood vessel pressure in the blood vessel is regulated.

Example 3:

different from embodiment 2, referring to fig. 9, the pressure adjusting device disposed at the middle position of the pipe body 1 of this embodiment is a valve, the valve includes a hand wheel 17, a valve rod 18, a sealing cover 19, a valve body 20, a rotating body 21, a sealing ring 22, a fixing piece 23, an upper sealing body 24, a lower sealing body 25, and a valve port 26, the valve body 20 is an integrally formed valve housing, the upper end of the valve body 20 is a convergent opening cone, the middle part is a cylinder with an internal thread disposed on the inner wall, the middle position of the lower part is disposed with the upper sealing body 24 and the lower sealing body 25, and the two ends of the lower part are disposed with the cylindrical valve port 26.

In this embodiment, the valve port 26 is integrally formed with the valve body 20, the inner side of the valve port 26 is fixedly connected with the outer side of the pipe body 1 through hot melting, a sealing cover 19 is fixedly arranged at the convergence part of the upper end of the valve body 20, a hole is arranged in the middle of the sealing cover 19, a valve rod 18 is arranged in the hole of the sealing cover 19, a hand wheel 17 is arranged at the upper end of the valve rod 18, an integrally formed rotating body 21 is arranged in the middle of the valve rod 18, an external thread matched with the internal thread of the valve body 20 is arranged on the outer wall of the rotating body 21, a sealing ring 22 is arranged below the rotating body 21, the sealing ring 22 is fixedly arranged at the lower end of the middle position of the valve body 20, a small hole is arranged in the middle of the sealing ring 22, the small hole has the same diameter as the small hole of the sealing cover 19 and is aligned with the vertical position, so as to prevent blood from entering the middle position of the valve body 20 to seep out, and a sealing ring 23 is fixedly connected to the bottom end of the valve rod 18, the seal ring 23 functions to seal and stop the flow of blood.

In this embodiment, the intermediate position of lower part is provided with the upper seal 24 and the lower seal 25 that cooperate sealed with sealing washer 23 in the valve body 20, upper seal 24 and lower seal 25 and valve body 20 integrated into one piece, upper seal 24 sets up at the intermediate position top surface of valve body 20 lower part, upper seal 24 is provided with the half circle and is middle for the semi-annular structure along valve body 20 is inside, lower seal 25 sets up on the bottom surface of the intermediate position of valve body 20 lower part, lower seal 25 is provided with the half circle and is middle for the semi-annular structure along valve body 20 is inside, the position that upper seal 24 and lower seal 25 meet passes through hot melt body coupling, and then constitute an annular ring, block this annular ring through sealing washer 23, and then adjust the blood flow in the pipe, and then adjust blood pressure.

Example 4:

different from the embodiment 3, referring to fig. 2, the length of the tube body 1 is 10cm, the two ends of the tube body 1 are respectively provided with a first interface device and a second interface device, the first interface device is communicated with the continuous kidney substitution treatment system, the second interface device is communicated with the outer membrane oxygenation system, the first interface device is a two-way luer connector male head 2, the second interface device is a three-way luer connector 3, the female head of the three-way luer connector 3 is connected with the outer membrane oxygenation system, the inner diameters of the two-way luer connector male head 2 and the three-way luer connector 3 are universal inner diameters, and the two-way luer connector male head 2 and the two-way luer connector 3 are medical common luer connectors.

Example 5:

different from the embodiment 4, referring to fig. 10, a pressure adjustable catheter comprises a tube body 1, wherein the length of the tube body 1 is 50cm, the tube diameter is 10mm, the first interface device and the second interface device are not arranged at the two ends of the tube body 1, one end of the tube body 1 is communicated with a blood vessel cannula of a patient body, and the other end of the tube body 1 is communicated with an adventitia oxygenation system.

The principle and the using process of the utility model are as follows:

when in use, a connecting pipe with one end being a luer connector male head 2 and the other end being a luer connector female head 4 can be respectively inserted into a continuous kidney substitution treatment system and an extracorporeal membrane oxygenation system machine.

Or a connecting pipe with one end being a luer male connector 2 and the other end being a three-way luer 3 can be respectively inserted on the continuous kidney substitution treatment system and the extracorporeal membrane oxygenation system machine.

When the pressure of the connecting pipe is adjusted, one type of the connecting pipe can be adjusted by adopting a pressure adjusting knob, the lifting rod 9 is driven to rotate in the fixing plate 8 by screwing the knob cap 10, and then the lifting plate 7 is driven to move up and down, so that the blood flow in the pipe body 1 is increased or reduced by extruding the pipe body 1, and the purpose of adjusting the pressure is achieved.

The blood flow can be adjusted through the flow regulator, and the roller 15 in the rolling regulator 13 is used, so that the distance between the roller 15 and the inner bottom surface of the regulator 13 is different due to the difference of the widths of the two ends of the adjusting groove 14, and the force exerted on the pipe body 1 between the roller 15 and the inner bottom surface of the regulator 13 is different, so that the pipe body 1 is extruded to increase or reduce the blood flow in the pipe body 1, and the purpose of adjusting the pressure is achieved.

The valve rod 18 can be driven to rotate up and down by screwing the hand wheel 17 through valve adjustment, and then the sealing ring 23 and the sealing ring formed by the upper sealing body 24 and the lower sealing body 25 are driven to be closed or opened and closed, so that the blood flow in the pipe body 1 is controlled, and the purpose of adjusting the pressure is achieved.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A pressure-adjustable catheter comprising a tube body (1), characterized in that: the first interface device and the second interface device are respectively arranged at two ends of the tube body (1), the first interface device is communicated with the continuous kidney replacement therapy system, and the second interface device is communicated with the extracorporeal membrane oxygenation system; and a pressure adjusting device is arranged in the middle of the pipe body (1).

2. A pressure adjustable catheter as claimed in claim 1, wherein: the first interface device is a two-way luer connector male head (2).

3. A pressure adjustable catheter as claimed in claim 1, wherein: the second interface device is a multi-way connector.

4. A pressure adjustable catheter as claimed in claim 3, wherein: the multi-way connector is a two-way luer connector female head (4).

5. A pressure adjustable catheter as claimed in claim 3, wherein: the multi-way connector is a tee.

6. A pressure accommodating catheter as in claim 5, wherein: the multi-way connector is a three-way luer connector (3).

7. A pressure accommodating catheter as claimed in any of claims 1 to 5, wherein: the pressure adjusting device is an adjusting knob, the adjusting knob comprises a fixed part and an adjusting part, and the adjusting part is movably arranged on the fixed part;

the fixing piece comprises an adjusting base (5), a side plate (6) and a fixing plate (8), the side plate (6) is fixedly arranged on the adjusting base (5), the fixing plate (8) is fixedly arranged at the upper end of the side plate (6), and a threaded hole is formed in the center of the fixing plate (8);

the adjusting piece comprises a lifting plate (7) and a lifting rod (9), and the lifting plate (7) is connected with the lifting rod (9) through a rotating mechanism.

8. A pressure accommodating catheter as in claim 7, wherein: the rotating mechanism comprises a rotating cover (11) and a rotating groove (12), the rotating cover (11) is rotatably arranged in the rotating groove (12), the rotating cover (11) is a circular plate integrally formed with the lifting plate (7), and the rotating groove (12) is an annular groove formed by the bottom surface of the lifting rod (9) and the rotating cover (11) in a matched mode.

9. A pressure accommodating catheter as claimed in any of claims 1 to 5, wherein: the pressure regulating device is a common flow regulator.

10. A pressure accommodating catheter as claimed in any of claims 1 to 5, wherein: the pressure regulating device is a valve and comprises a valve rod (18), a sealing cover (19), a valve body (20), a rotating body (21), a sealing ring (22), a sealing ring (23), an upper sealing body (24), a lower sealing body (25) and a valve port (26), wherein the valve body (20) is an integrally formed valve shell, the upper end of the valve body (20) is a convergent opening cone, the middle part of the valve body (20) is a cylinder of which the inner wall is provided with internal threads, the middle position of the lower part of the valve body (20) is provided with the upper sealing body (24) and the lower sealing body (25), the upper sealing body (24) and the lower sealing body (25) form an annular ring, the two ends of the lower part of the valve body (20) are provided with cylindrical valve ports (26), the inner side of the valve port (26) is fixedly connected with the outer side of the pipe body (1), and the convergent part of the upper end of the valve body (20) is fixedly provided with the sealing cover (19), the middle of sealed lid (19) is provided with porosely, be provided with integrated into one piece's rotor (21) in the middle of valve rod (18), the outer wall of rotor (21) is provided with the external screw thread with valve body (20) interior screw-thread fit, fixed the setting in the lower extreme of valve body (20) middle part position in sealing ring (22), offer the aperture that can pass valve rod (18) in the middle of sealing ring (22).