Medical drainage pressure regulating valve

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a medical drainage pressure regulating valve which comprises a liquid inlet shell and a liquid outlet shell movably connected with the liquid inlet shell in a clamped mode, a liquid inlet is formed in the outer side of the liquid inlet shell, a center shaft is fixedly connected to the inner side of the liquid inlet shell, a liquid outlet is formed in the outer side of the liquid outlet shell, and the center shaft is fixedly connected to the inner side of the liquid outlet shell. A clamping groove is fixedly connected to the inner side of the liquid outlet shell and connected with the center shaft in a clamped mode, an adjusting device capable of adjusting a threshold value is installed between the liquid inlet shell and the liquid outlet shell, an installation hole is formed in the middle of the adjusting device, and the adjusting device penetrates through the installation hole to be connected with the clamping groove in a clamped mode through the center shaft to be connected with the liquid inlet shell and the liquid outlet shell. According to the cerebrospinal fluid drainage device, cerebrospinal fluid drainage can be dynamically adjusted along with the change of intracranial pressure, meanwhile, cerebrospinal fluid in the drainage pipeline can be prevented from flowing back, the cerebrospinal fluid drainage nursing workload is reduced, and the cerebrospinal fluid drainage safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a medical drainage pressure regulating valve. Background Art

[0002] The normal range of intracranial pressure is between 5 - 15 millimeters of mercury (mmHg), and it is regulated by various factors, including the production and absorption of cerebrospinal fluid, hemodynamics, and changes in intracranial volume. However, various brain diseases and traumas may cause an increase in intracranial pressure, which is harmful to the perfusion and function of brain tissue. High intracranial pressure can cause brain tissue edema, ischemia, and displacement of intracranial structures, and may even lead to brain hernia in severe cases, endangering the life of the patient.

[0003] Currently, the main methods for regulating intracranial pressure by cerebrospinal fluid drainage in clinical practice are pure physical methods. The liquid outlet of the drainage pipeline drip bottle should be hung 10 - 15 cm higher than the head to maintain normal intracranial pressure. The range of head movement should be appropriately restricted, and the drainage tube should be avoided being pulled during activities and turning over. Sudden changes in intracranial pressure caused by sudden standing or sharp changes in the position of the head of the patient may lead to serious complications such as brain hernia and endanger life. Content of the Utility Model

[0004] In view of the above deficiencies in the prior art, the utility model provides a medical drainage pressure regulating valve to solve the above existing problems.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A medical drainage pressure regulating valve includes a liquid inlet housing and a liquid outlet housing that is movably clamped to the liquid inlet housing. A liquid inlet is provided on the outer side of the liquid inlet housing, a central shaft is fixedly connected to the inner side of the liquid inlet housing, a liquid outlet is provided on the outer side of the liquid outlet housing, a clamping groove is fixedly connected to the inner side of the liquid outlet housing, the clamping groove is clamped with the central shaft, and an adjustable threshold regulating device is installed between the liquid inlet housing and the liquid outlet housing. An installation hole is provided in the middle of the regulating device, and the regulating device is connected to the liquid inlet housing and the liquid outlet housing through the central shaft passing through the installation hole and clamping the clamping groove.

[0007] Further, the regulating device includes a regulating disk and an elastic disk that is coaxially and movably connected to the regulating disk. The elastic disk is fixedly connected to the liquid outlet housing, and the diameter of the elastic disk is smaller than the diameter of the liquid outlet housing. The regulating disk is rotationally connected to the central shaft. Elastic pieces that can swing left and right are provided on the elastic disk, and a plurality of first through holes with different diameters are distributed on the same circumference of the regulating disk.

[0008] Furthermore, the adjusting device includes an adjusting disk and an elastic disk coaxially movably connected to the adjusting disk, the elastic disk is fixedly connected to the liquid outlet housing, and the diameter of the elastic disk is smaller than the diameter of the liquid outlet housing, the adjusting disk is rotatably connected to the central axis, the elastic disk is provided with an elastic sheet that can swing left and right, and the adjusting disk is provided with a plurality of second through holes with the same diameter distributed on different circumferences.

[0009] Furthermore, the edge of the adjusting disk is provided with shifting teeth.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model can realize dynamic regulation of cerebrospinal fluid drainage as intracranial pressure changes, and can prevent cerebrospinal fluid backflow in the drainage pipeline, thereby reducing the workload of cerebrospinal fluid drainage nursing and improving the safety of cerebrospinal fluid drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional structural schematic diagram of a first embodiment of a medical drainage pressure regulating valve of the utility model;

[0013] Figure 2 It is a three-dimensional structure explosion diagram of a first embodiment of a medical drainage pressure regulating valve of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the regulating disk in Embodiment 1 of a medical drainage pressure regulating valve of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the regulating disk in Embodiment 2 of a medical drainage pressure regulating valve of the utility model;

[0016] Figure 5 This is a schematic diagram of liquid flow direction of an embodiment of a medical drainage pressure regulating valve of the utility model; DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0019] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] In the description of the present utility model, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] Embodiment:

[0022] Embodiment 1

[0023] As Figure 1 shown, the present utility model provides a medical drainage pressure regulating valve. When in use, the pressure regulating valve is connected to the drainage pipeline, and when the intracranial pressure is higher than the set threshold of the pressure regulating valve, the valve body opens, and the cerebrospinal fluid drains smoothly, thereby reducing the intracranial pressure; when the intracranial pressure is lower than the set threshold of the pressure regulating valve, the valve body closes, and the cerebrospinal fluid stops flowing out. At the same time, it can prevent the cerebrospinal fluid in the drainage pipeline from flowing back into the intracranial cavity, bringing the risk of infection.

[0024] The specific structure is as Figure 2 shown. An inlet liquid port 11 is provided on the inlet liquid housing 1 of the pressure regulating valve, which is connected to the proximal end of the cranial drainage tube (here, the proximal end refers to the side of the pipeline close to the human body) during use. A central axis 12 is arranged inside and is matched with the internal card slot of the outlet liquid housing 3, so that the adjusting disc 2 can rotate around the central axis 12 to adjust the opening threshold of the pressure regulating valve. An outlet liquid port 31 is provided on the outlet liquid housing 3, which is connected to the distal end of the cranial drainage tube and then to the collection device during use. An elastic disc 4 is arranged inside the outlet liquid housing 3, and the two are fixedly connected. Among them, the elastic disc 4 is an elastic body, preferably made of a material with a high elastic modulus such as nitinol, so that its mechanical characteristics approximately follow Hooke's law (F = k△X).

[0025] A shrapnel 41 is provided on the elastic disk 4, which is defined as a cantilever beam according to its mechanical characteristics. When the force on the front side of the shrapnel 41 is greater than its own elastic force, it will deform to the side where the force is applied.

[0026] As Figure 3 shown, the adjusting disk 2 is a movable part that can rotate around the central axis 12. Its distal side is in surface contact and fit with the elastic disk 4. It is provided with three first through holes with different apertures evenly arranged around the center of the circle. The distances from each first through hole to the central axis 12 are equal, that is, the centers of the circles are on the same circle. When the adjusting disk 2 is rotated so that any one of the first through holes is aligned with the shrapnel 41, according to the basic formula F = PS = k△X, the first through holes with different areas correspond to different pressure opening thresholds. When no first through hole is aligned with the shrapnel 41, the drainage liquid path is closed.

[0027] According to clinical data, the intracranial pressure range is 5 - 15 mmHg. Select a suitable elastic body 4 according to the above structure, and set a suitable through hole area according to the clinical drainage pressure opening threshold, then it can adjust different drainage pressures according to the patient's disease course during the drainage process. According to the above formula, the characteristic of this pressure regulating valve is that the through hole area is inversely proportional to the pressure opening threshold. The through hole with a large area corresponds to a small opening pressure threshold, and the through hole with a small area corresponds to a large opening pressure threshold. In this embodiment, the through holes are taken as an example of circles. In specific practice, any shape and quantity can be set as needed within the pressure regulation range.

[0028] During the clinical cerebrospinal fluid drainage process, connect this pressure regulating valve in the drainage pipeline to ensure that the liquid enters from the IN side. The external drainage pressure can be adjusted according to the patient's disease course needs, and then the drainage rate can be adjusted to avoid incomplete drainage and excessive drainage. At the same time, different positions of the adjusting disk 2 can achieve adjustable forward opening thresholds for drainage, clamping and other states during the drainage process. Improve the safety of the patient during the drainage process, avoid the verification complications caused by over-drainage, and reduce the difficulty of drainage nursing.

[0029] Embodiment 2

[0030] As Figure 4 shown, similar to Embodiment 1, its structure is also composed of four parts. In the above structure, the adjusting disk 2 is changed to part 5. The detailed structure of part 5 is shown in Figure 5 , which is provided with three second through holes with equal interface areas. Their centers are distributed on three concentric circles with different diameters and are evenly distributed on the circumference. Adjust the valve body opening threshold according to the change of the distance between the second through hole and the center of the circle. Similarly, according to Hooke's law in the generalized sense F = PS = k△X and the characteristics of the cantilever beam, when the force application point (through hole position) is farther from the center of the circle under the same pressure, the deformation of the shrapnel is greater. Combining Figure 5It can be deduced that the opening pressure thresholds of the three second through-holes are sorted from large to small as: P53 > P52 > P51. This embodiment only elaborates on the principle of the pressure regulating valve, and multiple corresponding through-holes can be set according to the requirements of the pressure opening threshold.

[0031] According to the structural characteristics in the above embodiment, when the proximal pressure value is greater than the set pressure opening threshold, the elastic piece 41 is deformed under pressure, and the schematic diagram of the liquid flow is as Figure 5 shown in A; when the proximal pressure is less than the set pressure opening threshold, the elastic piece maintains its initial state, the liquid flow cannot be conducted, and at the same time, the liquid at the distal end cannot flow back, avoiding excessive cerebrospinal fluid drainage and avoiding liquid backflow caused by the pressure difference between the proximal and distal ends.

[0032] The above are only the embodiments of the present utility model. Common knowledge such as the specific structures and characteristics known in the art are not described in detail here. Those of ordinary skill in the art know all the common technical knowledge in the technical field to which the utility model belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application and combined with their own abilities, improve and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent.

Claims

1. A medical drainage pressure regulating valve, characterized in that: The utility model comprises a liquid inlet shell and a liquid outlet shell movably connected with the liquid inlet shell, wherein a liquid inlet port is provided on the outer side of the liquid inlet shell, a central axis is fixedly connected on the inner side of the liquid inlet shell, a liquid outlet port is provided on the outer side of the liquid outlet shell, a card slot is fixedly connected on the inner side of the liquid outlet shell, the card slot is card-connected with the central axis, an adjusting device with adjustable threshold value is installed between the liquid inlet shell and the liquid outlet shell, a mounting hole is provided in the middle of the adjusting device, and the adjusting device is connected with the liquid inlet shell and the liquid outlet shell by the central axis penetrating the mounting hole and card slot.

2. The medical drainage pressure regulating valve according to claim 1, characterized in that: The adjusting device comprises an adjusting disk and an elastic disk coaxially and movably connected to the adjusting disk, the elastic disk is fixedly connected to the liquid outlet housing, and the diameter of the elastic disk is smaller than the diameter of the liquid outlet housing, the adjusting disk is rotatably connected to the central axis, the elastic disk is provided with an elastic sheet that can swing left and right, and the adjusting disk is provided with a plurality of first through holes with different diameters distributed on the same circumference.

3. The medical drainage pressure regulating valve according to claim 1, wherein: The adjusting device comprises an adjusting disk and an elastic disk coaxially and movably connected to the adjusting disk, the elastic disk is fixedly connected to the liquid outlet housing, and the diameter of the elastic disk is smaller than the diameter of the liquid outlet housing, the adjusting disk is rotatably connected to the central axis, the elastic disk is provided with an elastic sheet that can swing left and right, and the adjusting disk is provided with a plurality of second through holes with the same diameter distributed on different circumferences.

4. The medical drainage pressure regulating valve according to claim 2 or 3, characterized in that: The edge of the adjusting disk is provided with shifting teeth.

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