CN116549822B

CN116549822B - Liquid supplementing device, equipment and system

Info

Publication number: CN116549822B
Application number: CN202310535142.7A
Authority: CN
Inventors: 忻红波; 钟如此; 宋皓然; 吴林; 詹姆斯·科尔曼; 张睿; 包潇雅; 沈嘉奇
Original assignee: Yishu Medical Technology Chengdu Co ltd
Current assignee: Yishu Medical Technology Chengdu Co ltd
Priority date: 2022-12-19
Filing date: 2023-05-12
Publication date: 2024-05-03
Anticipated expiration: 2043-05-12
Also published as: CN116549822A

Abstract

A fluid replacement device for post-operative fluid replacement of a patient, the fluid replacement device comprising: a reservoir for storing a liquid; the moisturizing unit comprises a flushing component and a moisturizing component connected with the flushing component; one end of the connecting pipe is connected with the liquid storage device, and the other end of the connecting pipe is connected with the flushing assembly so as to guide liquid in the liquid storage device to the flushing assembly; at least one flow control mechanism is arranged in the flushing assembly and is used for controlling the liquid flow rate of the connecting pipe to the moisturizing assembly. The flow control mechanism comprises a microporous mechanism comprising at least one of a microporous sheet structure, a tube structure, and a membrane structure or a combination of structures. This fluid infusion device carries out accurate stable control to liquid flow through moisturizing unit to preset stable flow, realizes the accurate quantitative fluid infusion of automatic stable liquid flow, with moist patient's oral cavity and lip, reduces inflammation and infection emergence in the oral cavity, reduces patient postoperative complication, promotes patient's comfort, promotes patient and rehabilitates fast.

Description

Liquid supplementing device, equipment and system

Citation of related application

The invention claims priority to a Chinese patent application with application number 202211635755.X, filed on 12 months 19 of 2022, entitled "postoperative patient moisturizing device" to the China national intellectual property office, the entire contents of which are incorporated herein by reference.

Technical Field

The invention belongs to the technical field of postoperative fluid infusion medical instruments, and particularly relates to a fluid infusion device, equipment and a system.

Background

Secondary xerostomia is one of the most intense, clinically ubiquitous symptoms experienced by postoperative patients. Perioperative fasting and drug anesthesia-induced salivary gland inhibition are the two most significant causes of dry mouth in patients. Secondary xerostomia can cause physiological and psychological harm to patients, so that the patients can respond strongly to emergency, and the risks of complications such as delirium and the like are increased. Early post-operative drinking must be performed with absolute patient safety and with very stringent requirements, i.e., administration time to the patient, fluid replenishment volume per hour, total fluid replenishment volume for 24 hours, strict regulation and control of administration tools and patient position, etc.

The current common nursing measures for relieving postoperative dry mouth are to moisten the lips of a patient with a cotton swab or to care the lips of the patient with a device. The Chinese patent document CN105457150A discloses a nursing device which is convenient for a surgical patient to moisten lips, and comprises a saline bottle, normal saline and a silica gel hose, wherein the mouth of the saline bottle faces downwards, the saline bottle is fixed on a bracket through a string bag, the inner diameter of a liquid outlet end of the silica gel hose is provided with a cylindrical sponge, the lower part of the cylindrical sponge is exposed out of the liquid outlet end, and the liquid outlet end is in a hemispherical structure; the liquid outlet end is provided with a protective tube cover, one side of the upper end of the protective tube cover is provided with a connecting belt, the other end of the connecting belt is provided with a circular tube, and the circular tube is sleeved at the outer diameter end of the silica gel hose close to the liquid outlet end. This nursing device replaces cotton swab to dip in the water mode, but just like the measure of cotton swab moist patient lip, can't realize lasting from moist effect to the patient, and still need nurse or accompanying personnel to assist in handling, work vexation manpower, and just can moist patient lip, can't realize accurate ration moisturizing to solve the dry security and the travelling comfort problem of moisturizing of patient's mouth.

In view of the above, the invention provides a fluid infusion device to solve the problems that the existing nursing device and measures are difficult to realize automatic, stable and safe fluid infusion for patients and effectively solve the secondary dry mouth after operation.

Disclosure of Invention

The invention provides a fluid infusion device which is used for postoperative fluid infusion of patients, so as to solve the problems that the conventional nursing device is difficult to realize automatic stable and safe fluid infusion of patients and effectively relieve dry oral cavity, and the fluid infusion device accurately and stably controls the fluid flow through a moisturizing unit, and realizes accurate and quantitative fluid infusion of the automatic stable fluid flow at a preset stable flow rate so as to moisten the oral cavity and lips of the patients, reduce inflammation and infection in the oral cavity, reduce complications of the patients, promote comfort of the patients and promote rapid rehabilitation of the patients.

The aim and the technical problems of the invention are realized by adopting the following technical proposal.

The invention provides a fluid infusion device for postoperative fluid infusion of patients, which comprises: a reservoir for storing a liquid; the moisturizing unit comprises a flushing component and a moisturizing component connected with the flushing component; one end of the connecting pipe is connected with the liquid storage device, and the other end of the connecting pipe is connected with the flushing assembly so as to guide the liquid in the liquid storage device to the moisturizing assembly; at least one flow control mechanism is arranged in the flushing assembly and used for controlling the liquid flow rate of the connecting pipe to the moisturizing assembly.

Optionally, the flow control mechanism is configured to control the flow of liquid delivered to the moisturizing assembly by the connecting tube to be in the range of 6ml/h to 18 ml/h.

Optionally, the flow control mechanism comprises a microporous mechanism, and the microporous mechanism comprises at least one microporous sheet structure, one structure or a combination structure of a plurality of structures of a pipe structure and a membrane structure, and the microporous mechanism is used for controlling the liquid flow rate of the connecting pipe to the moisturizing component.

Optionally, the microporous mechanism is a microporous sheet structure, and the microporous sheet structure is provided with a micro through hole penetrating through the structural surface of the microporous sheet.

Optionally, the material of the microporous sheet structure comprises at least one of a silicon material, a steel material, and a rigid plastic material.

Optionally, the thickness range of the micro through hole is 0.2-0.5 mm, and the reasonable matching of the inner diameter and the inner diameter tolerance of the micro through hole is realized through CFD simulation dynamics design research analysis, and one or more sheet structures are used for controlling the liquid flow rate of the connecting pipe to the moisturizing component to be in the range of 6ml/h to 18 ml/h.

Optionally, the material of the tube structure includes at least one of a silicon material, a steel material, and a plastic material.

Optionally, the tube structure comprises a cylindrical tube structure for controlling the flow rate of the liquid delivered into the moisturizing assembly by the connection tube to be in the range of 6ml/h to 18 ml/h.

Optionally, the cylindrical hard tube structure of the tube structure is a capillary structure.

Optionally, the capillary structure includes the sleeve pipe, be provided with on the moisturizing unit and link up with the locating part of capillary structure, the capillary structure passes through locating part fixed connection is in on the moisturizing unit and with the inside link up of moisturizing unit, make liquid can follow the reservoir passes through the connecting pipe and flows to the capillary structure, the capillary structure is used for controlling the flow of liquid in the capillary structure, wherein, the length of capillary is greater than 100 with the internal diameter ratio.

Optionally, the limiting member is a soft limiting member.

Optionally, the limiting piece is a hard limiting piece such as a polycarbonate PC limiting piece or a polypropylene PP limiting piece.

Optionally, the pipe structure includes the cylindricality pipe structure, the tip of cylindricality pipe structure is equipped with the micropore structure, the aperture of micropore structure is less than the internal diameter of cylindricality pipe structure is used for controlling the connecting pipe is defeated to the interior liquid flow of moisturizing subassembly is in the within range of 6ml/h to 18 ml/h.

Optionally, the tube structure is a soft cylindrical tube structure.

Optionally, the inner diameter of the soft capillary structure is 0.1-0.2 mm, and the length is not less than 1.105m.

Optionally, the material of the soft capillary structure includes at least one of a resin material, a plastic material and a silica gel material.

Optionally, the pipe structure comprises a cylindrical pipe structure and a preset baffle piece which is arranged in the cylindrical pipe structure and matched with the inner wall of the cylindrical pipe structure;

the preset baffle and the cylindrical pipe structure form a spiral channel for controlling the liquid flow rate of the connecting pipe to the moisturizing component to be in the range of 6ml/h to 18 ml/h.

Optionally, the material of the pre-stop comprises at least one of a silicon material, a steel material and a plastic material, wherein the plastic material comprises a hard plastic material.

Optionally, the preset baffle comprises a screw, and the screw is used for being matched with the cylindrical pipe structure with the corresponding size, so that the liquid flow rate of the connecting pipe to the moisturizing component is controlled to be in the range of 6ml/h to 18 ml/h.

Optionally, the preset stopper is a stainless steel set screw.

Optionally, the preset baffle comprises a plurality of stainless steel set screws, and the stainless steel set screws are arranged in the cylindrical pipe structure at intervals.

Optionally, the preset baffle comprises a plurality of stainless steel set screws and a microporous sheet structure arranged between the stainless steel set screws.

Optionally, the material of the cylindrical tube is at least one of a silicon material, a plastic material or a steel material.

Optionally, the cylindrical tube is made of plastic material.

Optionally, the cylindrical tube is made of stainless steel.

Optionally, the microporous mechanism comprises a membrane structure for controlling the flow rate of the liquid delivered into the moisturizing assembly by the connecting tube to be in the range of 6ml/h to 18 ml/h.

Optionally, the membrane structure comprises a filter membrane shell and a microporous filter membrane arranged in the filter membrane shell;

Wherein, the input channel and the output channel in the filter membrane shell are respectively positioned at two sides of the membrane surface of the microporous filter membrane.

Optionally, the fluid infusion device further comprises a connector, wherein the connector is arranged between the reservoir and the connecting pipe, and comprises a drip chamber and a plug; the input end of the instillation cavity is connected with the liquid storage device and is communicated with the liquid storage device, and the output end of the instillation cavity is connected with the connecting pipe and is communicated with the connecting pipe.

Optionally, the fluid infusion device further comprises a fixing support, wherein the fixing support is arranged at the side of the moisturizing component, and the fixing support is of a flexible arc-shaped structure and is matched with the shape of the head and/or neck of a human body, and is used for fixing the moisturizing component.

The invention provides a fluid infusion device which comprises the fluid infusion device and a reservoir fixing piece, wherein the reservoir fixing piece is used for fixing the reservoir at a position which is about 90cm higher than the moisturizing component.

Optionally, the reservoir mounting is the stores pylon structure, be provided with height-adjustable's couple on the stores pylon structure, set up the link on the reservoir, the link can hang and put on the couple.

The invention provides an automatic fluid infusion device, which comprises: the fluid infusion device is characterized by comprising the fluid infusion device.

The invention provides an automatic fluid infusion system based on Bernoulli principle, which comprises: the automatic fluid infusion device is characterized by comprising the automatic fluid infusion device.

The invention provides an automatic fluid infusion system for post-operation, which comprises: the automatic fluid infusion system is described above.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention has at least one of the following advantages and beneficial effects:

1. The invention provides a fluid infusion device, which is used for infusion after operation of patients, and comprises: a reservoir for storing a liquid; the moisturizing unit comprises a flushing component and a moisturizing component connected with the flushing component; one end of the connecting pipe is connected with the liquid storage device, and the other end of the connecting pipe is connected with the flushing assembly so as to guide the liquid in the liquid storage device to the moisturizing assembly; at least one flow control mechanism is arranged in the flushing assembly and used for controlling the liquid flow rate of the connecting pipe to the moisturizing assembly. According to the liquid supplementing device, the liquid flow is accurately and stably controlled through the moisturizing unit, the accurate quantitative liquid supplementing of the automatic stable liquid flow is realized through the preset stable flow, so that the oral cavity and the lips of a patient are wetted, the inflammation and the infection in the oral cavity are reduced, the complications of the patient are reduced, the comfort of the patient is improved, and the rapid rehabilitation of the patient is promoted.

2. The invention provides a fluid infusion device, wherein the flow control mechanism comprises a micropore mechanism, and the micropore mechanism comprises at least one micropore sheet structure, one structure or a combination structure of a plurality of structures of a pipe structure and a membrane structure and is used for controlling the flow of the liquid which is infused into a moisturizing component by a connecting pipe. According to the invention, the flushing assembly is provided with a thin sheet structure with micro through holes, the thickness range of the thin sheet is 0.2-0.5 mm, the reasonable matching of the inner diameter of the micro through holes and the tolerance of the inner diameter is realized through CFD simulation dynamics design research analysis, one or more thin sheets are used for controlling the flow rate of liquid which is delivered into the moisturizing assembly by the connecting pipe in the moisturizing unit to be stabilized in the range of 6ml/h to 18ml/h, and the liquid flow with stable flow rate finally wets the lips and the oral cavity of a patient through contact with the lips of the patient.

3. The invention provides a fluid infusion device, wherein a flow control mechanism comprises a pipe structure, and the pipe structure comprises a cylindrical pipe structure and is used for controlling the water flow rate of the connecting pipe to be delivered into a moisturizing component to be in a range of 6ml/h to 18 ml/h; or the pipe structure comprises a cylindrical pipe structure and a preset baffle piece which is arranged in the cylindrical pipe structure and matched with the inner wall of the cylindrical pipe structure; the preset baffle and the cylindrical pipe structure form a spiral channel for controlling the liquid flow rate of the connecting pipe to the moisturizing component to be in the range of 6ml/h to 18 ml/h. For example, the flushing assembly is arranged as a spiral channel formed by a stainless steel screw structure arranged in a silica gel tube, the number of screws or the length of the stainless steel screws in the spiral channel is matched with the preset silica gel tube structure, the flushing assembly is used for controlling the liquid flow rate of the moisturizing unit, the liquid flow rate of the moisturizing unit is stably controlled within the range of 6ml/h to 18ml/h, and the lip and the oral cavity of a patient are wetted by the contact of the lip of the patient with the liquid flow of the stable flow rate.

4. The invention provides a liquid supplementing device, wherein a flow control mechanism comprises a pipe structure, a cylindrical hard pipe structure of the pipe structure is a capillary structure, the capillary structure comprises a sleeve, a limiting piece penetrating and fixing the capillary structure is arranged on a moisturizing unit, the capillary structure is fixedly connected to the moisturizing unit through the limiting piece and penetrates through the interior of the moisturizing unit, so that liquid can flow out from a liquid reservoir to the capillary structure through a connecting pipe, and the capillary structure is used for controlling the flow of the liquid in the capillary structure; the ratio of the length to the inner diameter of the capillary tube is more than 100, and the capillary tube is used for controlling the flow rate of the liquid which is conveyed into the moisturizing component by the connecting tube in the moisturizing unit to be in the range of 6ml/h to 18 ml/h. For example, by providing the flushing assembly as a capillary structure for controlling the flow of liquid within the moisturizing unit to the moisturizing assembly. According to Bernoulli equation calculation, because the reservoir hangs the height and is certain, the pressure value of liquid in the connecting pipe is unchangeable, but arrive capillary hole department, the cross-sectional area diminishes, and the flow diminishes, simultaneously because the pipeline is longer, the flow also diminishes to play accuse flow effect. According to the invention, the capillary structure is subjected to theoretical calculation and fluid dynamics software simulation calculation to obtain an optimal cylindrical structure design, and the moisture-preserving unit is used for stably controlling the liquid flow in the range of 6-18 ml/h by combining material properties, so that the liquid flow with stable flow is finally contacted with the lips and the oral cavity of a patient through the lip part of the patient.

5. The invention provides a fluid infusion device, wherein a flow control mechanism comprises a membrane structure, and the membrane structure comprises a filter membrane shell and a microporous filter membrane arranged in the filter membrane shell; wherein, the input channel and the output channel in the filter membrane shell are respectively positioned at two sides of the membrane surface of the microporous filter membrane. The flushing assembly of the flushing unit is arranged into a microporous filter membrane structure, the microporous filter membrane structure comprises a plastic shell and a microporous filter membrane, the microporous filter membrane is arranged in the plastic shell, and anti-skid threads are arranged on the outer side wall of the plastic shell. The filter membrane micropores of the microporous filter membrane structure have preset pore size and porosity, when liquid flows on the moisturizing unit, the measurement of the flowing liquid flow is reduced to 12-15 ml/h through a plurality of micropores on the filter membrane which play a role in permeation, the flow rate of the liquid flow is stably controlled to 12-15 ml/h through the action of the moisturizing unit, and the liquid flow with stable flow rate finally wets the lips and the oral cavity of a patient through contact with the lips of the patient.

6. The invention provides a liquid supplementing device, wherein the tube structure is a cylindrical soft tube structure, the cylindrical soft tube structure is set to be a soft capillary tube structure, and the flushing assembly in the flushing unit is set to be a cylindrical soft tube structure.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a post-operative patient water replenishment device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a sheet material structure of a postoperative patient hydration apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic side view of a sheet material structure according to an embodiment of the present invention;

FIG. 4 is a schematic view of a partial enlarged structure of the sheet material of FIG. 3 according to an embodiment of the present invention;

FIG. 4-1 is a schematic representation of simulated CFD simulation data for a cylindrical tube structure in accordance with an embodiment of the present invention;

FIG. 4-2 is a schematic cross-sectional view and an enlarged schematic view of a flush assembly according to an embodiment of the present invention;

FIGS. 4-3 are schematic views of a process for laser processing thin glass according to one embodiment of the present invention;

FIG. 5 is a schematic view of a capillary tube according to an embodiment of the present invention;

FIG. 5-1 is a schematic view of a capillary tube according to an embodiment of the present invention;

FIG. 6 is a schematic view of a screw or combination of a screw and a cylindrical structural member with an internal bore according to an embodiment of the present invention;

FIG. 6-1 is a schematic illustration of a screw or combination of a screw and a cylindrical structural member with an internal bore according to an embodiment of the present invention;

FIG. 6-2 is a schematic view of a screw or (screw) structure according to an embodiment of the present invention;

FIG. 7 is a schematic view of a microporous filter membrane structure according to an embodiment of the present invention;

FIG. 7-1 is a schematic illustration of a microporous filter membrane structure according to an embodiment of the present invention;

FIG. 7-2 is a schematic illustration of a microporous filter membrane structure according to another embodiment of the present invention;

FIG. 7-3 is a schematic illustration of the structure of the upper cover of the microporous filter membrane structure of FIG. 7-2 in accordance with the present invention;

FIGS. 7-4 are schematic illustrations of microporous filter membrane structures according to another embodiment of the present invention;

FIG. 7-5 is a schematic illustration of the shape of the microporous filter membrane structure of FIG. 7-4;

FIGS. 7-6 are schematic illustrations of the shape of the anti-slip cover of the microporous filter membrane structure of FIGS. 7-4;

FIG. 8 is a schematic view of a cylindrical hose structure with an internal bore according to an embodiment of the present invention;

FIG. 8-1 is a schematic view of a process for manufacturing a capillary structure according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a post-operative fluid replacement device for patients according to an embodiment of the present invention;

Fig. 10 is a front view schematically showing the structure of a fixing bracket in a moisturizing unit in accordance with an embodiment of the present disclosure.

Reference numerals and signs

1: Reservoir 2: connecting pipe

3: Connector 4: moisturizing unit

41: Flushing assembly 42: moisturizing assembly

43: Fixing bracket 411: cylindrical pipe structure

412: Stop 411a: hole(s)

8A1: laser beam 8a2: window

8A3: water medium 8a4: working distance

8A5: total internal reflection laser guidance direction 8a6: focusing lens

8A7: nozzle 8a8: ultrathin sheet glass structure

8B1: standard sleeve 8b2: pagoda-shaped structure

8B3: interference fit structure 8c1: cylindrical structural component

8C2: screw 8c3: screw

8D1: microporous filter membrane 8d2: polypropylene plastic shell

8D3: anti-skid thread structure 8d4: direction of flow

2A: oral tube 3a: connector head

4A: flushing head 8e1: percussion device

8E2: percussion device 8e3: extrusion runner structure

8E4: pad 8e5: container wall

8E6: dice structure 8e7: auxiliary structural member

Detailed Description

In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the attached drawings and the preferred embodiments.

In order to solve the problems of the prior intervention measures of the postoperative secondary xerostomia, the invention is set based on a standard medical scheme. According to the definition of xerostomia, if saliva secretion of an oral cavity reaches a certain threshold value and saliva secretion and consumption are in negative balance, oral mucosa cannot be sufficiently moistened, and a patient can produce subjective feeling of xerostomia. It was found that the basal secretion rate of saliva was 12ml/h in the absence of stimulus. In combination with basal salivary secretion, causes of post-operative secondary xerostomia, and observations and studies of clinical response of post-operative patients to different rates of water supplementation, the inventors have recognized that water supplementation by post-operative patients at a non-irritating saliva flow rate of 0.1 to 0.3ml (6-18 ml/h) per minute can avoid dry mouth, and generally, water supplementation of 0.2 to 0.25ml (12-15 ml/h) per minute is exactly consistent with non-irritating saliva flow rates, which can lead to the avoidance of dry mouth by a substantial portion of patients. On the basis, the invention provides a plurality of liquid replenishing devices, equipment and systems for regulating and controlling the liquid replenishing amount in different modes.

Embodiment one:

The invention provides a postoperative fluid infusion device for patients, which comprises:

A reservoir for storing a liquid; the connecting pipe is an infusion hose, one end of the connecting pipe is connected with the liquid reservoir and is communicated with the liquid replenishing liquid, and the other end of the connecting pipe is inserted into the moisturizing unit and is connected and communicated with the moisturizing unit; the moisturizing unit comprises a flushing assembly and a moisturizing assembly connected with the flushing assembly, wherein a micropore mechanism is arranged in the flushing assembly and used for controlling the flow of liquid which is input into the moisturizing assembly in the moisturizing unit; the moisturizing unit further comprises an elongated fixing bracket for fixing the moisturizing component in the moisturizing unit. The fluid infusion device further comprises a connector, wherein the connector is arranged between the connecting pipe and the reservoir and is used for connecting the reservoir and the connecting pipe.

The liquid storage device is a soft liquid storage bag or a hard liquid storage bottle. The connector is mainly used for connecting the liquid storage bag and the connecting pipe. The connecting pipe is a liquid conveying pipe and is made of medical rubber and plastic materials. The most central part of the invention, the liquid rate controlling member, is worn on the patient's lips to wet the patient's mouth.

As shown in fig. 1, the invention comprises a liquid reservoir 1, a connecting pipe 2, a connector 3 and a moisturizing unit 4. The functions of each part are as follows

Reservoir 1: the device is used for storing purified water or distilled water and comprises a soft liquid storage bag structure and a liquid storage bottle structure. Connecting pipe 2: one end of the medical water hose is connected with the liquid storage device through the connector, and the other end is connected with the moisturizing unit. Connector 3: and the connecting device is used for connecting the liquid reservoir and the connecting pipe. Moisturizing unit 4 (core of the present patent): the moisturizing unit 4 is a passive component and comprises a flushing component 41 and a moisturizing component 42, at least one micropore mechanism for controlling the liquid flow is arranged in the flushing component 41, the micropore mechanism can control the liquid flow flowing into the flushing component 41 and the moisturizing component 42 so as to obtain a stable liquid flow with the required liquid flow in the range of about 12ml/h, the moisturizing component 42 is worn on the mouth and the lips of a patient, the liquid flow and the stable liquid flow are controlled by the flushing component 41, and the liquid flow with the stable flow is output by the moisturizing component 42 so as to moisten the lips and the oral cavity of the patient.

Experimental study shows that the common height difference between the infusion support and the sickbed in the hospitalization ward of the Chinese hospital is about 90cm, and the invention sets 90cm as the hanging height of the liquid storage device 1 so as to adapt to domestic practical conditions. According to research and clinical data research, the flow of 6-18ml/h or more preferably 12-15 ml/h can effectively relieve secondary dry mouth of patients after general anesthesia and is safe. 300ml of water is dripped at a uniform speed for 24 hours to meet the research result, and the method is safe and effective.

The present invention calculates a flow rate as small as 12-15 ml/h so that the lips and mouth of the patient are not eventually wetted in a continuous stream, but rather the water droplets forming a drop-by-drop permeate from the moisturizing assembly 42 to wet the lips and mouth. The device is set to drop 20 drops from 1ml of water, the volume of one drop of water is 0.05ml (the mass is about 0.05 g), 300ml of water is 6000 drops, the water is dropped at a constant speed for 24 hours, 250 drops are dropped every hour, and 1 drop is generated every 14-15 seconds.

In the embodiment of the invention, 300ml of purified water or distilled water is filled in the liquid storage device 1, the liquid storage device 1 is hung above the lips of a patient to form a height difference at about 90cm, and water flows out of the liquid storage device through the connecting pipe 2 to the moisturizing unit 4 by the gravity principle. The height difference between the fixed reservoir 1 and the moisturizing unit 4 is 90cm, the height difference is constant, and the water pressure of the connecting pipe 2 flowing to the moisturizing unit is constant.

Embodiment two:

As shown in fig. 1, the present embodiment provides a postoperative fluid infusion device for patients, which includes a reservoir 1, a connection tube 2, a connector 3, and a moisturizing unit 4. In this embodiment, the reservoir 1 is connected to one end of the connection pipe 2 through the connector 3, and the other end of the connection pipe 2 is connected to the moisturizing unit 4.

In this embodiment, 300ml of purified water or distilled water is contained in the reservoir 1, the reservoir 1 is hung about 90cm above the lips of the patient to form a height difference, and water flows out of the reservoir by gravity and flows to the moisturizing unit 4 through the connection tube 2.

In this embodiment, the flushing component 41 in the moisturizing unit 4 is formed by a sheet-like structure with a certain thickness, as shown in fig. 2 to 4, a micropore with a certain shape is machined in the center of the material of the sheet-like structure by adopting a laser machining mode, the shape of the micropore can be square, round or oval, the matched size and shape of the micropore are calculated according to the bernoulli equation, and the bernoulli equation refers to an equation expressing the mechanical energy conservation of a moving fluid obtained by integrating a motion equation (i.e. an euler equation) along a streamline when an ideal positive pressure fluid performs steady motion under the action of a potential volume force. Because the hanging height of the liquid reservoir 1 above the moisturizing unit 4 is 90cm, the pressure value of the water at the position flowing to the moisturizing unit is unchanged, but the cross-sectional area at the position reaching the hole is reduced, the flow is reduced, and therefore the flow control effect is achieved. And obtaining the optimal shape and size of the hole through calculation and fluid dynamics software simulation calculation. Embodiments of the present invention are implemented in connection with existing viable production process schemes. The outer contour of the sheet structure may be a shape of a circle, an ellipse, a rectangle, or the like, which matches with the internal structure of the moisturizing unit 4, and the sheet structure may be made of glass material, or the like. The micropores in the center of the sheet structure are not limited to be processed into a horn-shaped structure form through a laser processing technology, dynamic parameters of fluid such as water flow at the micropores of the sheet structure are calculated, and the fluid such as water flow is analyzed by computer software to obtain a better dynamic parameter value and a range thereof.

The invention stably controls the liquid flow to be 6-18ml/h or further controls the liquid flow to be 12-15 ml/h through the action of the moisturizing unit 4, and the water flow with stable flow finally wets the lips and the oral cavity of the patient through contacting with the lip parts of the patient.

In this embodiment, as shown in fig. 4-3, the ultra-thin sheet glass structure is processed by a laser processing technique to obtain a desired preset pore size, so as to achieve that the sheet glass structure limits the flow rate through the sheet glass structure to a target range of 6ml/h to 18ml/h through the micro pore size. When the laser beam 8a1 is used for processing a glass sheet during small hole processing, the energy of the laser beam 8a1 can reach more than 20-400w, the cycle time can reach 1-500 ns, the laser beam passes through the focusing lens 8a6, the laser beam 8a1 is focused, the laser beam 8a1 is projected onto a workpiece of the ultrathin sheet glass structure 8a8 after passing through the window 8a2, the water medium 8a3 and the pipe orifice 8a7 from top to bottom, and the working distance 8a4 is between the ultrathin sheet glass structure 8a8 and the pipe orifice 8a 7. The laser beam 8a1 can be processed in the total internal reflection laser guidance direction 8a5 on the work piece of the ultra thin sheet glass structure 8a8, and the laser can provide accurate micron-scale manufacturing tolerances and high processing stability, and relatively low unit cost. The invention is further controlled by close tolerance, so that the flow rate passing through the micropores in the device is finally controlled in an ideal range of 12-15 ml/h, and the water flow with stable flow rate finally wets the lips and the oral cavity of the patient by contacting with the lip parts of the patient.

Embodiment III:

as shown in fig. 1, the present embodiment provides a technology for solving secondary dry mouth of a patient after general anesthesia, which comprises a liquid storage device 1, a connecting pipe 2, a connector 3 and a moisturizing unit 4. The liquid reservoir 1 is connected with one end of a connecting pipe 2 through a connector 3, and the other end of the connecting pipe 2 is connected with a moisturizing unit 4.

In this embodiment, 300ml of purified water or distilled water is contained in the reservoir 1, and the reservoir 1 is hung about 90cm above the lips of the patient to form a height difference, and water flows out of the reservoir by gravity. The moisturizing unit 4 is a cylindrical structure with an inner hole and is composed of hard materials, as shown in fig. 5, the capillary structure in fig. 5 is calculated according to the bernoulli equation, and because the hanging height of the reservoir 1 above the moisturizing unit 4 is 90cm, the pressure value of water in a connecting pipe is unchanged, but when reaching the hole, the cross-sectional area is reduced, the flow rate is reduced, and meanwhile, the energy loss is increased when the water flows is longer, the flow rate is also reduced, so that the flow control function is realized. The optimal cylindrical structure or capillary structure design is obtained through calculation and fluid dynamics software simulation calculation, and the embodiment of the invention is implemented by combining material properties.

In the embodiment, the water flow is stably controlled to be 6-18ml/h or further controlled to be 12-15 ml/h through the action of the moisturizing unit 4, and the water flow with stable flow finally wets the lips and the oral cavity of the patient through contacting with the lips of the patient. In this embodiment, as shown in fig. 5-1, fig. 5-1 is a schematic structural diagram of a stainless steel capillary according to an embodiment of the present invention, where the capillary structure includes a standard sleeve 8b1, a retaining member, such as a protrusion, that penetrates and fixes the capillary structure is provided on the moisturizing unit 4, and a tower structure 8b2, and the capillary structure is fixedly connected to the moisturizing unit 4 through the retaining member and penetrates through the interior of the moisturizing unit 4, so that liquid can flow out from the liquid reservoir 1 to the capillary structure through a connecting pipe 2, and the capillary structure is used for controlling the flow rate of the liquid in the capillary structure, where the ratio of the length of the capillary structure to the inner diameter of the capillary structure is greater than 100. The invention adopts the design form of the standard sleeve 8b1, integrates the capillary structure on a limiting piece with a certain shape, and installs and fixes the capillary structure inside the moisture-preserving unit 4, and liquid flows from the liquid reservoir 1 to the capillary structure through the connecting pipe 2, and plays a role of limiting flow through the capillary structure. The ratio of the length to the inner diameter of the capillary tube is greater than 100. The design is that the water flow is controlled to be in a target range of 6-18ml/h steadily, or further controlled to be in an ideal range of 12-15 ml/h. In this embodiment, as shown in fig. 4-2, fig. 4-2 shows a cylindrical tube structure with holes at the ends, and the cylindrical tube structure 411 is made of a hard material according to an embodiment of the present invention. The cylindrical tube structure 411 has a through hole 411a therein, and the stopper 412 connects and penetrates the cylindrical tube structure 411 to and from the connection tube 2, and the stopper 412 is also connected and penetrates the fixing bracket 43 provided in the moisturizing unit 4. In the present invention, the cylindrical pipe structure 411 is fixed in the moisturizing unit 4, and the flow rate of water is stably controlled within the range of 6-18ml/h or 12-15 ml/h by using the flow-limiting effect of the holes at the end of the cylindrical pipe structure or the holes inside the cylindrical pipe structure. In this embodiment, through fluid dynamics software simulation, under a predetermined condition, the liquid flows from the liquid reservoir to the cylindrical tube structure through the connecting tube, the pressure of the liquid is in the range of 7500Pa to 8500Pa, as shown in fig. 4-1, and in this pressure range, the target flow rate of the cylindrical tube structure in the moisturizing unit can be realized through CFD simulation and data calculation.

Embodiment four:

As shown in fig. 1, the present embodiment provides a technology for solving secondary dry mouth of a patient after general anesthesia, which comprises a liquid storage device 1, a connecting pipe 2, a connector 3 and a moisturizing unit 4. The liquid reservoir 1 is connected with one end of a connecting pipe 2 through a connector 3, and the other end of the connecting pipe 2 is connected with a moisturizing unit 4. In this embodiment, 300ml of purified water or distilled water is contained in the reservoir 1, and the reservoir 1 is hung about 90cm above the lips of the patient to form a height difference, and water flows out of the reservoir by gravity.

In this embodiment, as shown in fig. 6, the moisturizing unit 4 is a structure in which a screw 8c2 of a certain type is combined with a cylindrical structural member 8c1 having an inner hole, and the screw or the screw is installed in a through hole in the cylindrical structural member. The screw or the thread gap of the screw is used as a water flow channel, and the water flow is controlled by increasing the energy loss and the flow speed along with the increase of the distance in the flow because the screw or the thread gap of the screw is very thin and long, and the size and the material parameters of the optimal screw or the screw are obtained through the simulation calculation of the fluid dynamics software, so that the embodiment is invented by combining the feasibility of the production process.

In this embodiment, the flow rate of the liquid is controlled to be in a target range of 6-18ml/h or further controlled to be in an ideal range of 12-15 ml/h through the action of the moisturizing unit 4, and the water flow with the stable flow rate finally wets the lips and the oral cavity of the patient through contact with the lip parts of the patient. In the embodiment, as shown in the accompanying drawings 6-1 and 6-2, the screw 8c2 or the screw 8c3 and the silica gel tube are reasonably combined and matched to realize the flow target that the water flow is stably controlled at 6-18ml/h or 12-15 ml/h.

The spiral fluid channel of the spiral channel structure may be formed by inserting a screw having a designated size to adjust the flow rate. Food grade materials are used to make such screws as SUS304 and SUS316. For example, by calculation and test simulation, a spiral channel formed by two M2×4 set screws in series can achieve a target flow and maintain consistency within the same sample set. The rate of fluctuation was still acceptable when tested using an m2×8 set screw.

Fifth embodiment:

In this embodiment, as shown in fig. 1, the present embodiment provides a postoperative water replenishing device for patients, which includes a reservoir 1, a connection pipe 2, a connector 3, and a moisturizing unit 4. In this embodiment, the reservoir 1 is connected to one end of the connection pipe 2 through the connector 3, and the other end of the connection pipe 2 is connected to the moisturizing unit 4. In this embodiment, 300ml of purified water or distilled water is contained in the reservoir 1, and the reservoir 1 is hung about 90cm above the lips of the patient to form a height difference, and water flows out of the reservoir by gravity.

In this embodiment, as shown in fig. 7, the moisturizing unit 4 is a microporous filter membrane structure with a pore size and a porosity, the microporous filter membrane structure comprises a polypropylene plastic shell 8d2 and a microporous filter membrane 8d1 inside the polypropylene plastic shell, and when water flows in the moisturizing unit 4, the water flows through a plurality of micropores on the filter membrane to perform a permeation effect, so that the flow rate of the water flowing through the microporous filter membrane is reduced to 6-18ml/h or 12-15 ml/h. In this embodiment, the flow rate of the water is controlled to be in a target range of 6-18ml/h by the action of the moisturizing unit 4, or further controlled to be 12-15 ml/h, and the liquid flow with stable flow rate is finally used for moisturizing the lips and the oral cavity of the patient by contacting with the lips of the patient.

In this embodiment, as shown in fig. 7-1 to 7-6, the microporous filter membrane 8d1 is perpendicular to the water flow direction, and by being placed in a polypropylene plastic housing penetrating the water flow, an anti-slip screw structure 8d3 may be provided on the polypropylene plastic housing 8d2 outside the microporous filter membrane for installation and replacement, respectively, and the flow direction 8d4 indicates the direction of the liquid flow. The form of the microporous filter membrane structure described above is not limited to the microporous filter membrane structure of fig. 7-1 to 7-6. In the ideal flow rate range of 12-15 ml/h, the maximum flow rate fluctuation rate is 15/12=1.25, and the microporous filter membrane has a relatively uniform pore diameter, and can limit the flow rate of water to be in the range close to the target flow rate and fluctuation rate. The microporous filter membrane assembly and manufacturing method can be ultrasonic welding, and the microporous filter membrane is assembled by using threads after mechanical cutting. The risk of damage and blockage is very low for the following reasons: the maximum operating pressure of the filter exceeds 10mH20. Microporous filters can be used with purified water for more than 24 hours. The microporous filter membrane structure obtains the relation between the maximum water flow and the fluctuation rate by calculating the diameter, the aperture and the like of the filter membrane. The filter membrane diameter is calculated as: 13mm, pore diameter: 0.80um, porosity: 75-80%, and the maximum flow fluctuation rate is 1.18 when the polyether sulfone resin (PES) material is used. And the selected specification is the diameter of the filter membrane: 9mm; pore diameter: 5.0um, and the maximum flow fluctuation rate is 1.04, which all meet the target requirement.

Example six:

As shown in fig. 1, the present embodiment provides a postoperative patient water replenishing device, which includes a reservoir 1, a connection pipe 2, a connector 3, a moisturizing unit 4, and a wearing part (not shown in the figure). In this embodiment, the reservoir 1 is connected to one end of the connection tube 2 through the connector 3, the other end of the connection tube 2 is connected to the moisturizing unit 4, and the moisturizing unit 4 is connected to the wearing member. In this embodiment, 300ml of purified water or distilled water is contained in the reservoir 1, the reservoir 1 is hung about 90cm above the lips of the patient to form a height difference, and water flows out of the reservoir 1 by gravity.

In this embodiment, as shown in fig. 8, the moisturizing unit 4 is a cylindrical hose material with internal micropores, and is calculated according to the bernoulli equation, since the hanging height of 90cm above the moisturizing unit 4 of the reservoir 1 is fixed, the pressure value of water in the connecting pipe is unchanged, but the cross-sectional area becomes smaller at the arrival hole, the flow rate becomes smaller, and meanwhile, the flow rate becomes smaller as the pipeline is longer, so that the flow control effect is achieved. The best cylindrical structural design is obtained through calculation and fluid dynamics software simulation data calculation, and the implementation structure of the embodiment of the invention is invented by combining material properties and the existing production process. In this embodiment, the flow rate of the water is controlled to be in a target range of 6-18ml/h or further controlled to be 12-15 ml/h by the action of the moisturizing unit 4, and the water with the stable flow rate finally wets the lips and the oral cavity of the patient by contacting with the lips of the patient.

In this example, as shown in fig. 8-1, a capillary structure is used to achieve a limited target flow, a tubular material extrusion process is used, and a block polyether amide resin (Pebax) capillary structure made by the material extrusion process has fine dimensions (minimum up to 0.1 mm) and tolerance (+ -0.01 mm) control, and a range of extension lengths. As shown in fig. 8-1, the block polyether amide resin (Pebax) is placed in a closed movable container, a liner 8e4 of the container is internally provided with a striking device 8e1 which can strike along the container, the front end of the striking device is provided with a conversion mechanism 8e2, the conversion mechanism extrudes the block polyether amide resin (Pebax) which is closed and in the container along a space in an extrusion runner structure 8e3 at the front end of a container shell wall 8e5 through a dice structure 8e6, and the runner space is further provided with an auxiliary structural member 8e7 for protecting the extruded block polyether amide resin (Pebax) so as to facilitate rapid molding. To control the flow to the current range required, the minimum length will be 1105mm. It is known through experimentation that the (Pebax) capillary structure can approach or reach a preset target flow range. However, to control the flow rate to a range of 12.0ml/h to 15.0ml/h, the length of the capillary structure required becomes long. For example, the capillary structure of Pebax reaches a preset target flow rate range, if the flow rate of the liquid needs to be controlled to be in the range of 12.0ml/h-15.0ml/h, the length of the required capillary structure is 1.105m at minimum.

Embodiment seven:

As shown in fig. 9 to 10, a postoperative fluid infusion device for patients includes a reservoir 1, a mouth tube 2a, a connector 3a, a connecting tube 2, a rinsing head 4A, a moisturizing module 42, and a fixing bracket 43, and the core components of the product are the rinsing head 4A: the core part of the flushing head 4A with the flow control precision of 12-15 ml/h is provided with a very tiny hole in the flushing head 4A for controlling the flow of the internal liquid. Fig. 10 is a schematic front view of the fixing bracket of the present embodiment. The fixing bracket 43 is connected with the moisturizing unit 4, and the moisturizing unit 4 is provided with a rinsing head 4A, and the description of the structure of the connection of the fixing bracket is referred to the foregoing description and will not be repeated herein.

Example eight:

The invention provides an automatic fluid infusion system based on Bernoulli principle, which comprises: the automatic fluid infusion device is characterized by comprising the automatic fluid infusion device. An automatic fluid replacement system based on Bernoulli's principle can ensure that fluid replacement is performed while the reservoir is maintained at a height of 90cm, and the flow control mechanism can be configured to control the flow rate of fluid delivered to the moisturizing assembly by the connecting tube to a target range of 6-18ml/h, or even further to a desired range of 12-15 ml/h. In an embodiment of the present invention, the present invention further provides an automatic fluid replacement system for a patient after surgery, including: according to the automatic fluid infusion system, the automatic fluid infusion system can be used for postoperative fluid infusion of patients, and the problem that the existing nursing device is difficult to realize fine quantitative fluid infusion of automatic stable liquid flow rate is solved.

The postoperative water supplementing device for patients does not need a valve or an electric control system, does not need to install a manual adjusting device, automatically realizes stable flow rate by means of gravity, and can safely and scientifically relieve postoperative secondary dry mouth. The invention relates to a one-stop type postoperative secondary xerostomia relieving device which is developed based on the latest postoperative early drinking strategy theory under the guidance of an accelerated rehabilitation surgery (ERAS) concept. The invention overcomes the defect of the traditional cotton swab dipping measure and has the following advantages:

(1) The method is effective: the invention can provide 12-15ml/h continuous and controllable water flow based on accurate salivary flow rate setting, achieves the thirst threshold value of the fluid infusion flow of a patient at 6-18ml/h, just supplements and meets the requirement of oral mucosa on water, does not cause thirst feeling to the patient, and really leads the patient to be far away from the trouble of dry mouth.

(2) Safety: the bionic human salivary gland is extremely safe in 12-15 ml/flow setting, and can not generate choking and cough caused by water drop accumulation when being used for patients with complete consciousness, recovered airway reflex function and no nausea and vomiting.

(3) And (3) lasting: the invention can continuously moisten the oral cavity of a patient for 24 hours through the liquid storage device filled with 300ml of water, and perfectly covers the dry window period of the oral cavity of the patient.

(4) The convenience is as follows: the invention is an automatic device, is simple to use, can be continuously used for 24 hours by one-time operation, and greatly reduces the workload of nursing staff.

(5) And (3) quick: the invention can rapidly meet urgent demands of patients, and can rapidly supplement water to lips and oral cavities of the patients, and can be away from dry mouth within 60 minutes.

(6) Comfort: the invention adopts the design conforming to the human engineering, the material is light, and the discomfort such as compression and the like can not be generated when the patient wears the device for a long time.

(7) The invention accords with a postoperative early-stage scientific drinking water management strategy under the concept of accelerated rehabilitation surgery (ERAS), so that accurate, scientific, quantitative, controllable and safe drinking water is possible.

The invention only needs one simple installation operation, and greatly reduces the nursing workload and burden of nursing staff. The design water flow of the invention is equivalent to half of the normal saliva secretion of a human body, so that the problem of secondary dry mouth of a patient after general anesthesia operation can be safely and effectively relieved, the comfort level of the oral cavity of the patient is improved, and the acceleration of rehabilitation of the patient is promoted. The invention is a passive medical instrument technology, avoids risks brought by active instruments, has no water pump, control circuit or electric control valve and the like, and solves the safety problem of the active instruments under the water condition. The invention is a disposable medical instrument, avoids cross infection and has wide popularization value.

The present invention is not limited to the above embodiments, but is not limited to the above embodiments, and any person skilled in the art can make many modifications and equivalents using the above disclosed technical matters without departing from the scope of the present invention. For example, the above embodiments describe a device for supplementing water to a post-operation patient, but the device provided by the present invention is not limited to be used for supplementing water to a post-operation patient, and may be used in other situations where a patient or a user is supplemented with liquid, such as a heart failure patient, a hemodialysis patient, or the like, which has a strict requirement for water limitation. However, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fluid replacement device for post-operative fluid replacement of a patient, comprising:

a reservoir for storing a liquid;

The moisturizing unit comprises a flushing component and a moisturizing component connected with the flushing component;

One end of the connecting pipe is connected with the liquid storage device, and the other end of the connecting pipe is connected with the flushing assembly so as to guide the liquid in the liquid storage device to the moisturizing assembly;

at least one flow control mechanism is arranged in the flushing assembly and used for controlling the liquid flow rate of the connecting pipe to the moisturizing assembly;

the flow control mechanism comprises a micropore mechanism, and the micropore mechanism comprises a pipe structure and is used for controlling the liquid flow rate of the connecting pipe to the moisturizing component;

the pipe structure comprises a cylindrical pipe structure and a preset baffle piece which is arranged in the cylindrical pipe structure and matched with the inner wall of the cylindrical pipe structure;

The preset baffle and the cylindrical pipe structure form a spiral channel for controlling the liquid flow of the connecting pipe to the moisturizing component.

2. The fluid replacement device of claim 1, wherein the flow control mechanism is configured to control the flow of liquid to the moisturizing assembly from the connecting tube in the range of 6ml/h to 18 ml/h.

3. The fluid replacement device of claim 1 or 2 wherein the microporous mechanism further comprises a microporous sheet structure having microperforations through a structural face of the microporous sheet structure.

4. A fluid infusion device in accordance with claim 3, wherein the material of the microporous sheet structure comprises at least one of a silicon material, a steel material, and a rigid plastic material.

5. The fluid replacement device of claim 1 or 2, wherein the material of the tube structure comprises at least one of a silicon material, a steel material, and a plastic material.

6. The fluid replacement device of claim 5 wherein the cylindrical tube structure is configured to control the flow of fluid from the connector tube to the moisturizing assembly in the range of 6ml/h to 18 ml/h.

7. The fluid replacement device of claim 6 wherein the cylindrical tube structure comprises a capillary tube structure.

8. The fluid replacement device of claim 7, wherein:

The capillary structure comprises a sleeve structure, a limiting piece penetrating through and fixing the capillary structure is arranged on the moisturizing unit, the capillary structure is fixedly connected to the moisturizing unit through the limiting piece and penetrates through the moisturizing unit, so that liquid can flow out from the liquid reservoir to the capillary structure through a connecting pipe, and the capillary structure is used for controlling the flow of the liquid in the capillary structure.

9. The fluid replacement device of claim 5, wherein a microporous structure is disposed at an end of the cylindrical tube structure, and a pore diameter of the microporous structure is smaller than an inner diameter of the cylindrical tube structure, so as to control a flow rate of the liquid delivered into the moisturizing assembly by the connecting tube to be in a range of 6ml/h to 18 ml/h.

10. The fluid replacement device of claim 6 wherein the tube structure is a flexible cylindrical tube structure.

11. The fluid replacement device of claim 10 wherein the flexible cylindrical tube structure comprises a flexible capillary tube structure, the material of the flexible capillary tube structure comprising at least one of a resin material, a plastic material, and a silicone material.

12. The fluid infusion device of claim 5, wherein the material of the pre-stop comprises at least one of a silicon material, a steel material, and a plastic material.

13. The fluid replacement device of claim 12 wherein the pre-set stop comprises a screw for cooperating with the cylindrical tube structure of a corresponding size to control the flow of fluid from the connection tube into the moisturizing assembly to a range of 6ml/h to 18 ml/h.

14. The fluid infusion device of claim 13, wherein the pre-set stop is a stainless steel set screw.

15. The fluid infusion device of claim 14, wherein the pre-set stop comprises a plurality of stainless steel set screws spaced apart within the cylindrical tube structure.

16. The fluid infusion device of claim 12, wherein the pre-set stop comprises a plurality of stainless steel set screws and a microporous sheet structure disposed between the stainless steel set screws.

17. The fluid infusion device of claim 15, wherein the cylindrical tube is at least one of a silicon material, a plastic material, or a steel material.

18. The fluid replacement device of claim 1 or 2, wherein the microporous mechanism further comprises a membrane structure for controlling the flow of fluid from the connection tube into the moisturizing assembly in the range of 6ml/h to 18 ml/h.

19. The fluid replacement device of claim 18, wherein:

The membrane structure comprises a filter membrane shell and a microporous filter membrane arranged in the filter membrane shell;

20. The fluid replacement device of claim 1 or 2, wherein:

the device also comprises a connector, wherein the connector is arranged between the liquid reservoir and the connecting pipe, and comprises a instillation cavity, a plug and the like;

the input end of the instillation cavity is connected with the liquid storage device and is communicated with the liquid storage device, and the output end of the instillation cavity is connected with the connecting pipe and is communicated with the connecting pipe.

21. The fluid infusion device of claim 1 or 2, further comprising a fixing bracket disposed beside the moisturizing assembly, wherein the fixing bracket is of a flexible arc-shaped structure, and is matched with the shape of the head and/or neck of the human body, and is used for fixing the moisturizing assembly.

22. A fluid replacement apparatus comprising a fluid replacement device as claimed in any one of claims 1 to 21 and a reservoir holder for holding the reservoir at a height of 90cm above the moisturizing assembly.

23. The fluid replacement apparatus of claim 22 wherein the reservoir holder is a hanger structure having a height adjustable hook thereon, and wherein the reservoir is provided with a hanging ring capable of being hung on the hook.

24. An automatic fluid infusion device, comprising: a fluid replacement device according to claim 22 or 23.

25. An automated fluid replacement system based on bernoulli's principle, comprising: the automatic fluid replacement device of claim 24.

26. An automatic fluid replacement system for use after surgery, comprising: the automatic fluid replacement system of claim 25.