Suction device and suction method

Abstract

The application provides a suction device and a suction method. The suction device comprises a suction pump assembly, a liquid collecting bag, a suction guide pipe and a filter, the suction guide pipe, the filter, the suction pump assembly and the liquid collecting bag are sequentially connected, the suction pump assembly is used for providing a suction pressure to the body fluid, so that the body fluid flows through the suction guide pipe and enters the filter, and after the body fluid is separated from the foreign matter in the filter, the body fluid enters the liquid collecting bag through the suction pump assembly. The application solves the technical problem that the body fluid cannot be separated from the foreign matter.

Description

Technical Field

[0001] This invention relates to the field of suction technology, and in particular to a suction device and suction method. Background Technology

[0002] In clinical applications within the medical field, aspiration devices are commonly used during surgery to aspirate bodily fluids from patients, such as blood (including bleeding), exudate, and pus. These fluids often contain solid or semi-solid gel-like foreign bodies, which typically need to be removed along with the fluids and separated for necessary observation and analysis. However, existing aspiration devices are unable to separate bodily fluids from foreign bodies. Summary of the Invention

[0003] The purpose of this invention is to provide a suction device and suction method to solve the technical problem of being unable to separate body fluids from foreign matter.

[0004] This invention provides a suction device for suctioning bodily fluids and separating foreign matter from the bodily fluids. The device includes a suction pump assembly, a collection bag, a suction conduit, and a filter. The suction conduit, the filter, the suction pump assembly, and the collection bag are connected sequentially. The suction pump assembly provides suction pressure to the bodily fluids, causing the fluids to flow through the suction conduit and into the filter. After the fluids are separated from the foreign matter in the filter, they pass through the suction pump assembly into the collection bag.

[0005] The suction device further includes a first connecting pipe and a second connecting pipe. The first connecting pipe is connected between the suction conduit and the filter, and the second connecting pipe is connected between the collection bag and the suction pump assembly.

[0006] The suction device further includes a connecting seat, which is installed at the end of the first connecting tube away from the filter, and is used to connect the suction conduit to the first connecting tube.

[0007] The suction device further includes a power source and a switch. The power source is connected to the suction pump assembly and is used to provide power to the suction pump assembly. The switch is located on the suction pump assembly and is used to control the suction pump assembly to turn on or off.

[0008] This invention provides a suction method for aspirating bodily fluids and separating foreign matter from the bodily fluids, comprising: providing a suction device, wherein the suction device includes: a suction pump assembly, a collection bag, a suction conduit, and a filter, the suction conduit, the filter, the suction pump assembly, and the collection bag being connected in sequence; controlling the suction pump assembly to provide suction pressure to the bodily fluids, so that the bodily fluids flow through the suction conduit and enter the filter, and after the bodily fluids are separated from the foreign matter in the filter, they enter the collection bag through the suction pump assembly.

[0009] The suction method further includes displaying the suction pressure on the suction device.

[0010] The aspiration method further includes: moving the aspiration position of the aspiration device when the aspiration pressure is greater than or equal to a preset pressure; and continuing to aspirate the body fluid when the aspiration pressure on the aspiration device after the movement is less than the preset pressure within a preset time.

[0011] The phrase "the suction pressure is greater than or equal to the preset pressure" includes: the suction device adsorbs onto the wall tissue that carries the body fluid; the phrase "the suction pressure on the moved suction device is less than the preset pressure within a preset time" includes: the moved suction device separates from the wall tissue, so that the suction pressure on the suction device is less than the preset pressure.

[0012] The phrase "the suction pressure is greater than or equal to the preset pressure" includes: the suction device suctions the foreign object, and the foreign object blocks the suction conduit; the phrase "the suction pressure on the suction device after movement is less than the preset pressure within the preset time" includes: within the preset time, the foreign object deforms, and the deformed foreign object passes through the suction conduit, so that the suction pressure on the suction device is less than the preset pressure.

[0013] The aspiration method further includes: stopping the aspiration of the body fluid when the aspiration pressure on the moved aspiration device is greater than or equal to the preset pressure within the preset time.

[0014] In summary, this application, by incorporating a filter, can filter bodily fluids to separate them from foreign matter. The separated foreign matter can be analyzed and observed, while the filtered bodily fluid can be stored in a collection bag. This application solves the technical problem that existing suction devices cannot filter bodily fluids to separate foreign matter. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the suction device provided in the embodiments of this application.

[0017] Figure 2 This is a schematic diagram of another suction device provided in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the first type of filter provided in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the second type of filter provided in the embodiments of this application.

[0020] Figure 5 This is a schematic diagram of the structure of the third type of filter provided in the embodiments of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the first type of filter membrane provided in the embodiments of this application.

[0022] Figure 7 This is a schematic diagram of the structure of the second type of filter membrane provided in the embodiments of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the third type of filter membrane provided in the embodiments of this application.

[0024] Figure 9 This is a schematic diagram of the first structure of the suction pump assembly provided in the embodiments of this application.

[0025] Figure 10 This is a schematic diagram of a second structure of the suction pump assembly provided in the embodiments of this application.

[0026] Figure 11 This is a schematic diagram of the first display mode of the display provided in the embodiments of this application.

[0027] Figure 12 This is a schematic diagram of a second display mode of the display provided in the embodiments of this application.

[0028] Figure 13 This is a schematic diagram of the third display mode of the display provided in the embodiments of this application.

[0029] Figure 14This is a schematic diagram of the first type of suction method provided in the embodiments of this application.

[0030] Figure 15 This is a schematic diagram of the second flow of the suction method provided in the embodiments of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that for aspiration devices, the end that enters the body fluid is generally called the "proximal end", and the end that moves away from the body fluid after entering the body fluid is called the "distal end" of the aspiration device. Based on this principle, the "proximal end" and "distal end" of any component of the aspiration device are defined.

[0033] Please see Figure 1 This invention provides a suction device for aspirating bodily fluids and separating foreign matter from them. The device includes a suction pump assembly 1, a collection bag 2, a suction conduit, and a filter 3. The suction conduit, filter 3, suction pump assembly 1, and collection bag 2 are connected sequentially. The suction pump assembly 1 provides suction pressure to the bodily fluids, causing them to flow through the suction conduit and into the filter 3. After separation from foreign matter within the filter 3, the bodily fluids pass through the suction pump assembly 1 into the collection bag 2. It is understood that the proximal end of the suction conduit is a free end used for initial suction of the bodily fluids, while the distal end is connected to the filter 3 to deliver the aspirated bodily fluids into the filter 3. The suction pump assembly 1 acts as the primary pressure source, such as a negative pressure source, generating continuous suction pressure, such as a negative pressure suction force, to draw the bodily fluids through the suction conduit into the filter 3. After filtration, the bodily fluids are stored in the collection bag 2. The foreign body can be solid or semi-solid gel-like. After the body fluid containing the foreign body passes through filter 3, the foreign body is filtered out in filter 3, and the filtered body fluid enters the collection bag 2 for storage. The body fluid can be blood, exudate, ascites, effusion, sputum, mucus, pus, or a mixture of the above.

[0034] In this application, by setting up filter 3, bodily fluids can be filtered to separate them from foreign matter. The separated foreign matter can be analyzed and observed, and the filtered bodily fluids can be stored in collection bag 2. This application solves the technical problem that existing suction devices cannot filter bodily fluids to separate foreign matter.

[0035] In one specific embodiment, the suction device further includes a first connecting pipe 4 and a second connecting pipe 5, wherein the first connecting pipe 4 is connected between the suction conduit and the filter 3, and the second connecting pipe 5 is connected between the collection bag 2 and the suction pump assembly 1.

[0036] In this application, by setting a first connecting pipe 4 to connect the suction catheter and the filter 3, and a second connecting pipe 5 to connect the collection bag 2 and the suction pump assembly 1, the length of the suction device is extended, making it easy to place. The suction device can be easily moved with the patient, the product is easy to operate, and it is easy to fix the suction device.

[0037] In one specific embodiment, the suction device further includes a connecting seat 6, which is installed at the end of the first connecting tube 4 away from the filter 3, and is used to connect the suction conduit to the first connecting tube 4.

[0038] In this application, the connection seat 6 facilitates the connection between the first connecting tube 4 and the suction catheter, resulting in better connection performance between the first connecting tube 4 and the suction catheter, and preventing damage to the connection ends of the first connecting tube 4 and the suction catheter.

[0039] In one specific embodiment, the suction device further includes a power source 7 ( Figure 9 The power source 7 is connected to the suction pump assembly 1 to provide power to the suction pump assembly 1. It is understood that the power source 7 can be a rechargeable or non-rechargeable battery, such as a lithium cobalt oxide battery, zinc-manganese battery, magnesium-manganese battery, lithium-manganese battery, lithium-thionylene battery, lithium iron phosphate battery, etc. In specific applications, a rechargeable lithium cobalt oxide battery is chosen as the power source 7. This power source 7 has stable performance, no memory effect, and relatively high energy density, which can meet the energy requirements of the suction pump assembly 1. The power source 7 can be located inside or outside the suction pump assembly 1. In this application, the power source 7 provides an energy source for the suction pump assembly 1, enabling the suction pump assembly 1 to operate continuously and provide continuous suction pressure, such as negative pressure suction.

[0040] In one specific embodiment, the aspiration device further includes a switch 8, which is disposed on the aspiration pump assembly 1 and used to control the aspiration pump assembly 1 to open or close. It is understood that the switch 8 can be a push-button switch or an electronic switch. When the switch 8 is a mechanical switch 8, it can be activated to start the aspiration device when aspiration of bodily fluid is required. The mechanical switch 8 can be a push-button switch 8 or a rotary switch 8, etc. When the switch 8 is an electronic switch 8, it can be activated by sensing to start the aspiration device when aspiration of bodily fluid is required. The electronic switch 8 can be a proximity switch 8, a photoelectric switch 8, etc.

[0041] Please see Figure 2The present invention also provides a suction device for aspirating body fluid and separating foreign matter from the body fluid, comprising: a suction pump assembly 1, a collection bag 2, a suction conduit, a filter 3, and a syringe 9. The suction conduit, the filter 3, the suction pump assembly 1, and the collection bag 2 are connected in sequence. The syringe 9 is connected between the suction conduit and the filter 3. The suction pump assembly 1 and / or the syringe 9 are used to provide suction pressure to the body fluid so that the body fluid flows through the suction conduit and enters the filter 3. After the body fluid is separated from the foreign matter in the filter 3, it enters the collection bag 2 through the suction pump assembly 1.

[0042] In this application, the suction device is equipped with a filter 3, which can filter body fluids to separate them from foreign matter. The separated foreign matter can be analyzed and observed, and the filtered body fluid can be stored in a collection bag 2. This application solves the technical problem that existing suction devices cannot filter body fluids to separate foreign matter.

[0043] Furthermore, this application also includes a suction pump assembly 1 and a syringe 9. The suction pump assembly 1 serves as the primary suction pressure source, or can also serve as the primary negative pressure source. The syringe 9 on the suction device can serve as a secondary suction pressure source, or can also serve as a secondary negative pressure source. When the volume of foreign matter in the body fluid is large and requires a large instantaneous suction pressure, or when it is necessary to increase the suction speed, the syringe 9 can be operated to increase the additional suction pressure without stopping the suction pump assembly 1, which can improve the suction efficiency and the success rate of suction.

[0044] In one specific embodiment, the suction device further includes a first connecting tube 4 and a second connecting tube 5. The first connecting tube 4 is connected between the suction conduit and the filter 3, and the second connecting tube 5 is connected between the collection bag 2 and the suction pump assembly 1. The syringe 9 is connected to the first connecting tube 4.

[0045] In this application, the first connecting tube 4 and the second connecting tube 5 extend the length of the suction device, facilitating placement and allowing the suction device to be easily moved with the patient. The product is easy to operate and convenient to fix the suction device. Moreover, the syringe 9 of this application is located on the first connecting tube 4, which is convenient for installation, and the syringe 9 is close to the suction catheter, which facilitates the rapid increase of additional suction pressure.

[0046] In one specific embodiment, the suction device further includes a tee 10, which is mounted on the first connecting tube 4, and the syringe 9 is connected to the first connecting tube 4 via the tee 10. It is understood that when additional suction pressure is required from the syringe 9, the tee 10 provides an additional pressure source pathway, allowing the syringe 9 to provide additional suction pressure.

[0047] In this application, the three-way valve 10 adds a suction pressure source path, and the three-way valve 10 can be easily installed with the syringe 9. Thus, when a large suction pressure is required instantly or when the suction speed needs to be increased, the syringe 9 can be operated to increase the additional suction pressure, which can improve the suction efficiency and the success rate of suction.

[0048] In one specific embodiment, the syringe 9 includes a barrel 91 and a piston 92, the piston 92 being disposed within the barrel 91. The piston 92 moves within the barrel 91 to generate suction pressure to supply bodily fluids. It is understood that the suction pressure gradually increases as the piston 92 is withdrawn from the barrel 91.

[0049] In one specific embodiment, the outer wall of the cylinder 91 is provided with multiple spaced scale lines 93.

[0050] In this application, the scale line 93 on the outer wall of the cylinder 91 can indicate the distance the piston 92 moves, and thus can indicate the suction pressure provided by the syringe 9.

[0051] In one specific embodiment, the distance between adjacent scale lines 93 is equal. This facilitates the fabrication of the scale lines 93.

[0052] In one specific embodiment, the cylinder 91 includes a first end 911 and a second end 912 disposed opposite to the second end 912. The first end 911 is close to the first connecting pipe 4. In the direction from the first end 911 to the second end 912, the distance between adjacent scale lines 93 gradually decreases. It can be understood that the distance between adjacent scale lines 93 is larger near the first end 911 and smaller near the second end 912.

[0053] Thus, during the process of piston 92 withdrawing from cylinder 91, the suction pressure is not very high near the first end 911, and the scale lines 93 at larger distances can roughly indicate the suction pressure. Near the second end 912, the suction pressure increases, and the scale lines 93 at smaller distances can accurately indicate the suction pressure. Therefore, based on the position of the piston 92 at the scale line 93, the current suction pressure can be indicated as needed, providing the operator with a basis for judging the suction status.

[0054] In one specific embodiment, there are multiple syringes 9, which are spaced apart on the first connecting tube 4. Thus, multiple syringes 9 can provide greater instantaneous suction pressure and greater suction speed, thereby significantly improving suction efficiency and success rate. It is understood that multiple syringes 9 can be used simultaneously, or some of the syringes 9 can be used simultaneously. For example, if there are five syringes 9 in total, all five syringes 9 can be used simultaneously, or three, four, etc., can be used simultaneously.

[0055] In one specific embodiment, at least two of the plurality of syringes 9 have different volumes of barrel 91. Thus, the plurality of syringes 9 can provide different aspiration pressure ranges, and syringes 9 of appropriate volumes can be selected according to the required aspiration pressure, increasing the flexibility of the aspiration device.

[0056] In one specific embodiment, there are multiple tee ports 10, each corresponding to a multiple syringe 9, and each syringe 9 is connected to the first connecting tube 4 through a tee port 10. Thus, the arrangement of multiple tee ports 10 facilitates the connection of multiple syringes 9 to the first connecting tube 4.

[0057] The following will introduce filter 3. Filter 3 is used to filter foreign objects from bodily fluids.

[0058] Please see Figure 3 The filter 3 includes a housing 31 and a filter membrane 32. The housing 31 has a receiving space 33. The housing 31 has an inlet 34 and an outlet 35 opposite to the inlet 34. Both the inlet 34 and outlet 35 are connected to the receiving space 33. The filter membrane 32 is housed within the receiving space 33 and is engaged with the inner circumferential surface of the housing 31. Bodily fluid enters the receiving space 33 through the inlet 34, passes through the filter membrane 32 to filter foreign matter, and is discharged through the outlet 35. It can be understood that the filter 3 as a whole constitutes a sealed container structure. To a certain extent, foreign matter accumulates due to its own gravity or the potential energy of the bodily fluid flow, rather than being scattered. The accumulated foreign matter reduces clogging of the filter membrane 32, ensuring the flow performance of the bodily fluid. The accumulated foreign matter also reduces the loss of suction pressure, improving suction efficiency. Both the inlet 34 and outlet 35 can be flexible hose interfaces.

[0059] In this application, by setting a filter membrane 32 inside the housing 31, after the body fluid containing foreign matter enters the receiving space 33 of the filter 3, the body fluid flows through the filter membrane 32, and the foreign matter is filtered on the filter membrane 32. This achieves the filtration of foreign matter by the filter membrane 32, and the foreign matter on the filter membrane 32 can be removed for analysis and observation.

[0060] In one specific embodiment, the housing 31 includes a first sub-shell 311 and a second sub-shell 312. A first sub-space is formed within the first sub-shell 311, and a second sub-space is formed within the second sub-shell 312. The first sub-shell 311 and the second sub-shell 312 are connected to form a receiving space 33. It is understood that the first sub-shell 311 is the front cover of the filter, and the second sub-shell 312 is the rear cover of the filter. The front and rear covers can be fixed by threaded connections, snap-fit ​​connections, or compression fittings, facilitating the operator to disassemble the filter 3 to remove filtered foreign matter for necessary observation and analysis. This solution can optionally connect the front and rear covers with an interference fit, which facilitates disassembly, and under pressure, their structures will compress against each other to ensure sealing.

[0061] In this application, by setting the shell 31 as a first subshell 311 and a second subshell 312, it is convenient to set a first subspace in the first subshell 311 and a second subspace in the second subshell 312. The accommodating space 33 can be formed by connecting the first subspace and the second subspace. The formation of the accommodating space 33 is convenient and simple.

[0062] In one specific embodiment, the first sub-shell 311 includes a top wall 311a and a first peripheral wall 311b connected to the top wall 311a. The first peripheral wall 311b is connected to the top wall 311a to form a first subspace, and an inlet 34 is disposed on the top wall 311a. The second sub-shell 312 includes a bottom wall 312a and a second peripheral wall 312b connected to the bottom wall 312a. The second peripheral wall 312b is connected to the bottom wall 312a to form a second subspace, and an outlet 35 is disposed on the bottom wall 312a. A filter membrane 32 is disposed on the inner surface of the second peripheral wall 312b.

[0063] In this application, by placing the filter membrane 32 on the inner surface of the second peripheral wall 312b, it is equivalent to placing the filter membrane 32 on the inner surface of the second sub-shell 312. This facilitates the installation and replacement of the filter membrane 32 and makes it easier to remove foreign objects filtered on the filter membrane 32.

[0064] Please see Figure 4 In one specific embodiment, the filter membrane 32 includes a first connecting end 321 and a second connecting end 322 disposed opposite to the first connecting end 321. The filter membrane 32 is inclined such that the distance between the first connecting end 321 and the top wall 311a is greater than the distance between the second connecting end 322 and the top wall 311a. The liquid inlet 34 is eccentrically disposed and close to the first connecting end 321, and the liquid outlet 35 is eccentrically disposed and close to the first connecting end 321.

[0065] Understandably, the inclined filter membrane 32, under the combined action of fluid flow and the gravitational potential energy of foreign objects, makes it easier for foreign objects to accumulate at the second connecting end 322, reducing pore blockage of the filter membrane 32 and effectively preventing large amounts of foreign objects from clogging it. Simultaneously, it ensures a larger total pore area of ​​the unblocked filter membrane 32, reducing fluid flow resistance and guaranteeing suction effect. Furthermore, since both the inlet 34 and outlet 35 are close to the first connecting end 321, which is close to the top wall 311a, when fluid containing foreign objects enters the filter 3, the foreign objects are more likely to accumulate downwards to the second connecting end 322, while the fluid passes directly through the first connecting end 321 and is discharged from the outlet 35. According to fluid dynamics, when the centerline of fluid flow is as far away from the centerline of foreign objects as possible, the fluid experiences relatively less resistance, effectively ensuring suction effect. Therefore, this application can minimize the impact of foreign objects on fluid flow and guarantee suction effect.

[0066] Please see Figure 5 In one specific embodiment, the filter membrane 32 includes multiple layers of filter screens spaced apart, with the porosity of the multiple filter screens gradually decreasing in the direction from the inlet 34 to the outlet 35. It is understood that the cross-sectional area of ​​a single pore of the filter screen gradually decreases in the direction from the inlet 34 to the outlet 35.

[0067] Understandably, when it is necessary to filter both relatively large and small foreign objects simultaneously, if a single-layer filter is used, it is necessary to accommodate the smallest foreign object. The cross-sectional area of ​​a single pore of the filter needs to be smaller than the cross-sectional area of ​​the smallest foreign object. Because the cross-sectional area of ​​the filter pores is small, when a large foreign object passes through, it will block a large number of pores. At the same time, smaller foreign objects are less likely to accumulate and will disperse and block other pores under the action of body fluid flow. This will further reduce the cross-sectional area of ​​the unblocked pores of a single filter, increase the resistance to body fluid flow, and affect the suction effect.

[0068] In this application, the filter screen is multi-layered, with the porosity of each layer gradually decreasing. After the body fluid enters the filter 3 through the inlet 34, it passes through the filter screens step by step. Larger particles are filtered and intercepted in the front filter membrane 32. Because large particles have good aggregation properties, the total unblocked pore area of ​​the front filter membrane is large, and the individual pore cross-sectional area of ​​the front filter membrane 32 is also large, resulting in lower resistance to the liquid flow. The subsequent filter screens only filter smaller particles, with relatively fewer blocked pores, and the total unblocked pore area of ​​the subsequent filter screen is relatively large. Therefore, the multi-layered filter screen provides better filtration and lower liquid flow resistance, ensuring effective suction.

[0069] like Figure 5In this system, the filter consists of two layers: a primary filter 32a near the inlet 34 and a secondary filter 32b near the outlet 35. The porosity of the primary filter 32a is greater than that of the secondary filter 32b, and the cross-sectional area of ​​a single pore in the primary filter 32a is also greater than that in the secondary filter 32b. This two-stage filter can filter both large and small foreign objects without clogging, resulting in lower liquid flow resistance and ensuring effective suction.

[0070] In one specific embodiment, the surface of the filter membrane 32 facing the liquid inlet 34 is provided with an anti-adhesion coating, which is used to prevent foreign objects from adhering to the filter membrane 32. In this application, the anti-adhesion coating can prevent foreign objects from adhering to the filter membrane 32, can cause foreign objects to accumulate, and can prevent foreign objects from clogging the pores of the filter membrane 32 as much as possible.

[0071] In one specific embodiment, the filter 3 further includes a membrane pressing ring 36, which is fixed to the inner circumferential surface of the housing 31, and the periphery of the filter membrane 32 is fixed to the membrane pressing ring 36. In this application, the membrane pressing ring 36 allows the filter membrane 32 to be stably fixed inside the filter 3.

[0072] In one specific embodiment, the porosity of the filter membrane 32 is 30%-90%. This porosity effectively ensures the structural strength of the filter membrane 32, allowing body fluids to be filtered from the filter membrane 32 more quickly, improving filtration efficiency, and also allowing foreign matter to remain on the filter membrane 32. Optionally, the porosity can be 60-80%.

[0073] In one specific embodiment, the filter membrane 32 is made of one or more of polyether ether resin (PES), nylon, polytetrafluoroethylene (PTFE), and polypropylene (PP). For example, polyether ether resin (PES) or polytetrafluoroethylene (PTFE) itself has hydrophobic or hydrophilic characteristics, or can be modified to have hydrophilic or hydrophobic characteristics. It is understood that the filter membrane 32 material with specific properties is selected according to the composition of the filtered foreign matter. For example, the filter membrane 32 can be selected based on the hydrophobic or hydrophilic properties of the foreign matter. The above materials can further cause the foreign matter to aggregate due to its own gravity or the potential energy of body fluid flow, rather than being scattered.

[0074] In one specific embodiment, the structure of the filter membrane 32 can be a woven structure, a non-woven structure, or a pore structure of arbitrary shape cut from a plane. For example, when the filter membrane 32 is selected as a cut pore structure, the pore shape can be a regular or irregular circle, polygon, or other arbitrary shape. When the pore structure is a circle A ( Figure 6Circular pore structures possess more stable shape characteristics. At the same porosity, circular membrane materials exhibit better structural strength and tear resistance. The diameter of the circular pores ranges from 0.001mm to 2mm, or even 0.1mm to 1mm. This filter membrane 32 minimizes the impact on bodily fluid flow while ensuring effective impurity filtration. When the pore structure is square (B)... Figure 7 A square pore structure, while balancing strength and porosity, can improve porosity compared to a circular structure. When the pore structure is elongated (C)... Figure 8 The elongated pore structure can maximize porosity and minimize the impact on body fluid flow.

[0075] The following will introduce the suction pump 12 component 1.

[0076] Please see Figure 9 The suction pump 12 assembly 1 includes: a housing 11, a suction pump 12, a display 13, a pressure sensor 14, and a controller 15. The suction pump 12, display 13, controller 15, and pressure sensor 14 are all housed within the housing 11. The pressure sensor 14, suction pump 12, and display 13 are all connected to the controller 15. The suction pump 12 includes an inlet end 121 and an outlet end 122. The suction pump 12 is used to draw body fluid in from the inlet end 121 and discharge body fluid from the outlet end 122. The pressure sensor 14 is located on the inlet end 121 and is used to sense the suction pressure of the suction pump 12 and transmit the sensing signal to the controller 15. The controller 15 controls the display 13 to show the suction pressure of the suction pump 12 based on the sensing signal. It is understood that the pressure sensor 14 can be a strain gauge pressure sensor, which can be sealed to isolate body fluid from the circuitry, providing good waterproofing, stability, and reliability.

[0077] In this application, the suction pump 12 serves as the primary pressure source, providing the power to aspirate bodily fluids and generating continuous primary suction pressure, such as negative pressure suction. The pressure sensor 14 transmits the sensed pressure from the suction pump 12 to the controller 15. The controller 15 controls the display 13 to show the suction pressure of the suction pump 12. The suction pressure displayed on the display 13 can provide feedback on the suction status of the suction pump 12, such as whether the suction is currently smooth, allowing the operator to intuitively perceive the situation.

[0078] In one specific embodiment, the housing 11 is provided with a recess 11a for accommodating a filter 3, which is used to connect to the inlet end 121 of the suction pump 12. The recess 11a accommodates the filter 3, saving space and making the suction device smaller in size.

[0079] In one specific embodiment, the suction pump 12 is a unidirectional pump, used to allow body fluid to flow unidirectionally from the inlet end 121 to the outlet end 122. The suction pump 12 can be a diaphragm pump, peristaltic pump, centrifugal pump, plunger pump, or other pumps that can provide negative pressure. For example, a peristaltic pump or diaphragm pump can provide a stable and continuous negative pressure suction capability. At the same time, the pump's working principle only allows single-phase liquid flow, effectively preventing liquid backflow and secondary contamination during suction. Furthermore, the pump's relatively small size meets overall portability requirements.

[0080] Please see Figure 10 In one specific embodiment, a one-way valve 134 is provided on the inlet end 121. The one-way valve 134 is used to control the unidirectional flow of body fluid from the inlet end 121 to the outlet end 122. The one-way valve 134 can be a diaphragm one-way valve 134, a spring-loaded one-way valve 134, a swing one-way valve 134, or a gravity one-way valve 134. For example, the diaphragm one-way valve 134 has high sensitivity to pressure, such as negative pressure, has a relatively good control effect, a simple structure, is easy to process and manufacture, and has little impact on liquid flow.

[0081] In this application, by adding a one-way valve 134, backflow of body fluids can be prevented, and in some highly polluted body fluids, secondary pollution can be further avoided.

[0082] Optionally, the power source 7 can be located within the suction pump 12 assembly 1, such as... Figure 9 As shown. Thus, the suction pump 12 components 1 has a compact overall structure and excellent portability. The power source 7 is built-in, requiring no additional connection operations. The corresponding suction operation can be performed as soon as the package is opened, improving the user experience.

[0083] Alternatively, the power source 7 can also be located outside the suction pump 12 assembly 1, such as... Figure 10 As shown, the power source 7 is externally mounted, effectively avoiding the hazards caused by leakage of the power source 7. For example, when the power source 7 is a battery, it avoids the hazards caused by battery leakage and also avoids the impact of battery self-discharge and power reduction during storage on the final suction effect. Moreover, the external battery can be reused, reducing the number of batteries used and reducing the environmental pollution caused by battery disposal.

[0084] Please see Figure 11 In one specific embodiment, the display 13 is a display panel 131, which has multiple spaced indicator lights 132. As the suction pressure of the suction pump 12 increases, the number of illuminated indicator lights 132 increases. The number of illuminated indicator lights 132 represents the suction pressure of the suction pump 12. Optionally, the indicator lights 132 are LEDs, which have high brightness, low energy consumption, simple structure, stability, reliability, and high resolution. Optionally, the indicator lights 132 are LED beads.

[0085] In this application, the number of indicator lights 132 illuminated can intuitively represent the suction pressure of the suction pump 12, thereby providing the operator with the current suction pressure of the suction pump 12.

[0086] In one specific embodiment, the suction pressure of the suction pump 12 includes multiple sequentially connected pressure ranges. The number of indicator lights 132 that are lit corresponds one-to-one with the multiple pressure ranges. The controller 15 is used to control the number of indicator lights 132 that are lit according to the pressure range where the current pressure of the suction pump 12 is located. For example, five indicator lights 132 can be set on the display panel 131. The five indicator lights 132 can indicate six states: a) 0 indicator lights 132 lit indicates that the pump is not currently powered on; b) 1 indicator light 132 lit indicates that the suction pressure is 0KPa-20KPa; c) 2 indicator lights 132 lit indicates that the suction pressure is 20KPa-40KPa; d) 3 indicator lights 132 lit indicates that the suction pressure is 40KPa-60KPa; e) 4 indicator lights 132 lit indicates that the suction pressure is 60KPa-80KPa; f) 5 indicator lights 132 lit indicates that the suction pressure is 80KPa-100KPa. When one indicator light (132) is lit, it indicates that the tubing is completely clear, there are no foreign objects in the body fluid, and the body fluid viscosity is low, such as ascites, effusion, blood, or mixtures thereof. When two indicator lights (132) are lit, the tubing is clear, there are no solid foreign objects in the body fluid, but it contains components with higher viscosity, such as pus, sputum, mucus, or mixtures thereof. When three indicator lights (132) are lit, the tubing is basically clear, there are small foreign particles in the body fluid, with a particle diameter less than half the cross-sectional area of ​​the suction tube lumen. When four indicator lights (132) are lit, the tubing is congested, there are large foreign particles in the body fluid, with a foreign object diameter greater than half the cross-sectional area of ​​the suction tube lumen. When five indicator lights (132) are lit, the tubing is blocked, the suction tube opening is blocked by foreign objects in the body fluid, or the suction tube opening is sucking up tissue structures, such as the walls of human organs, fat layers, or blood vessels.

[0087] In this application, by setting a one-to-one correspondence between the number of indicator lights 132 that are lit and the pressure range, the current suction state can be determined more accurately based on the current number of indicator lights 132 that are lit, and a basis can be provided for whether the suction device needs to be adjusted.

[0088] Please see Figure 12 In one specific embodiment, the display 13 is an indicator light 132. As the pressure of the body fluid increases, the illuminated area of ​​the indicator light 132 gradually increases. The illuminated area of ​​the indicator light 132 is used to characterize the suction pressure of the suction pump 12. It can be understood that the illuminated area of ​​the indicator light 132 increases in a gradient. Optionally, the indicator light 132 is a light strip.

[0089] In this application, the area illuminated by the indicator light 132 can intuitively represent the suction pressure of the suction pump 12, thereby providing the operator with the current suction pressure of the suction pump 12.

[0090] In one specific embodiment, the suction pressure of the suction pump 12 includes multiple pressure ranges connected in sequence, and the area illuminated by the indicator light 132 corresponds one-to-one with the multiple pressure ranges. The controller 15 is used to control the area illuminated by the indicator light 132 according to the pressure range in which the current pressure of the suction pump 12 is located.

[0091] Five different lighting areas can be set on indicator light 132, which can indicate six different states: a) 0% lighting area indicates that the machine is not currently powered on; b) 20% lighting area indicates a suction pressure of 0-20 kPa; c) 40% lighting area indicates a suction pressure of 20-40 kPa; d) 60% lighting area indicates a suction pressure of 40-60 kPa; e) 80% lighting area indicates a suction pressure of 60-80 kPa; f) 100% lighting area indicates a suction pressure of 80-100 kPa. When 20% of the illuminated area is lit, it indicates that the tubing is completely unobstructed, there are no foreign objects in the body fluid, and the body fluid viscosity is low, such as ascites, effusion, blood, or mixtures thereof. When 40% of the illuminated area is lit, the tubing is unobstructed, there are no solid foreign objects in the body fluid, but it contains components with higher viscosity, such as pus, sputum, mucus, or mixtures thereof. When 60% of the illuminated area is lit, the tubing is basically unobstructed, and there are small foreign particles in the body fluid, with a particle diameter less than half the cross-sectional area of ​​the aspiration tube lumen. When 80% of the illuminated area is lit, the tubing is congested, and there are large foreign particles in the body fluid, with a foreign object diameter greater than half the cross-sectional area of ​​the aspiration tube lumen. When 100% of the illuminated area is lit, the tubing is blocked, the aspiration tube opening is blocked by foreign objects in the body fluid, or the aspiration tube opening is sucked onto tissue structures, such as the walls of human organs, fat layers, or blood vessels.

[0092] In this application, by setting a one-to-one correspondence between the area illuminated by the indicator light 132 and the pressure range, the current suction state can be determined more accurately based on the area illuminated by the indicator light 132, and a basis can be provided for whether the position of the suction device needs to be adjusted.

[0093] Please see Figure 13In one specific embodiment, the suction pressure of the suction pump 12 includes multiple sequentially connected pressure ranges. The color of the indicator light 132 corresponds one-to-one with each of these pressure ranges. The controller 15 controls the display color of the indicator light 132 according to the current pressure range of the suction pump 12. The color of the indicator light 132 represents the suction pressure of the suction pump 12. It is understood that by setting color changes to display pressure (relative to air pressure) changes, the color changes are more noticeable and easier to observe. The indicator light 132 can be a light strip or an LED.

[0094] In this application, by setting a one-to-one correspondence between the color of the indicator light 132 and the pressure range, the current suction state can be determined more accurately based on the current color of the indicator light 132, and a basis can be provided for whether the position of the suction device needs to be adjusted.

[0095] For example, indicator light 132 can display 5 colors and indicate 6 states: a) No color indicates that indicator light 132 is lit, meaning the machine is not currently powered on; b) Red indicator light 132 indicates a suction pressure of 0KPa-20KPa; c) Orange indicator light 132 indicates a suction pressure of 20KPa-40KPa; d) Yellow indicator light 132 indicates a suction pressure of 40KPa-60KPa; e) Green indicator light 132 indicates a suction pressure of 60KPa-80KPa; f) Blue indicator light 132 indicates a suction pressure of 80KPa-100KPa. When indicator light 132 is red, it indicates that the tubing is completely clear, there are no foreign objects in the body fluid, and the body fluid viscosity is low, such as ascites, effusion, blood, or mixtures thereof. When indicator light 132 is orange, the tubing is clear, there are no solid foreign objects in the body fluid, but it contains components with higher viscosity, such as pus, sputum, mucus, or mixtures thereof. When indicator light 132 is yellow, the tubing is basically clear, there are small foreign particles in the body fluid, with a particle diameter less than half the cross-sectional area of ​​the aspiration tube lumen. When indicator light 132 is green, the tubing is congested, there are large foreign particles in the body fluid, with a foreign object diameter greater than half the cross-sectional area of ​​the aspiration tube lumen. When indicator light 132 is blue, the tubing is blocked, the aspiration tube opening is blocked by foreign objects in the body fluid, or the aspiration tube opening is sucking up tissue structures, such as the walls of human organs, fat layers, or blood vessels.

[0096] Please see Figure 14 In addition to the aforementioned suction device, this invention also provides a suction method for suctioning bodily fluids and separating foreign matter from the fluids. The suction method includes:

[0097] S1, a suction device is provided, wherein the suction device includes: a suction pump assembly 1, a collection bag 2, a suction conduit and a filter 3, and the suction conduit, the filter 3, the suction pump assembly 1 and the collection bag 2 are connected in sequence.

[0098] S2, control the suction pump assembly 1 to provide suction pressure to the body fluid so that the body fluid flows through the suction tube and enters the filter 3. After the body fluid is separated from foreign matter in the filter 3, it enters the collection bag 2 through the suction pump assembly 1.

[0099] The suction method of this application filters the body fluid using a filter 3 to separate the body fluid from foreign matter. The separated foreign matter can be analyzed and observed, and the filtered body fluid can be stored in a collection bag 2. This application solves the technical problem of not being able to filter body fluid to separate foreign matter.

[0100] In one specific embodiment, the aspiration method further includes:

[0101] Displays the suction pressure on the suction device. Specifically, this method displays the pressure on the suction pump assembly 1.

[0102] In this application, by displaying the suction pressure on the suction device, the suction status of the suction device can be fed back, such as whether the suction is currently smooth or whether a blockage has occurred, so that the operator can intuitively perceive whether the position of the suction device needs to be adjusted or whether the suction device needs to be cleaned.

[0103] In one specific embodiment, the aspiration method further includes:

[0104] When the suction pressure is greater than or equal to the preset pressure, the suction position of the moving suction device is adjusted. It can be understood that adjusting the suction position primarily involves moving the suction cannula. This movement of the suction cannula can be slight, such as 1mm or 2mm.

[0105] If the suction pressure on the moved suction device remains below a preset pressure for a preset time, the body fluid continues to be aspirated. It is understood that when the suction pressure is greater than or equal to the preset pressure, the suction pressure on the suction device is high, and the suction process is not smooth; when the suction pressure is less than the preset pressure, the suction pressure on the suction device is low, and the suction process is smooth. The preset pressure can be understood as a benchmark for smooth suction. The preset pressure can be 60 kPa, but it can also be 40 kPa, 80 kPa, etc. This application does not limit the specific value of the preset pressure. The preset time can be 5 seconds, 10 seconds, etc., or other specific values. This application does not limit the specific value of the preset time.

[0106] In this application, when the suction pressure on the suction device is greater than or equal to a preset pressure, the suction position of the suction device is moved. If, within a preset time, the pressure on the suction device falls below the preset pressure, suction of the body fluid continues. This allows the suction process to continue even when suction is not smooth, by adjusting the position of the suction device. The adjustment of the suction process is simple and quick.

[0107] In one specific embodiment, "suction pressure greater than or equal to preset pressure" includes: the suction device adsorbing onto the wall tissue carrying the body fluid. It is understood that the wall tissue can be vascular tissue carrying blood.

[0108] "The suction pressure on the moved suction device is less than the preset pressure within a preset time" includes:

[0109] After the suction device moves, it separates from the wall tissue, causing the suction pressure on the device to fall below the preset pressure. This means that after the suction position of the device moves, the suction cannula separates from the wall tissue, resulting in a suction pressure below the preset pressure. The suction pressure can decrease to a lower level within a short time, such as within 1 or 2 seconds.

[0110] In this application, by moving the suction position of the suction device, the suction position of the suction device is separated from the wall tissue, which can reduce the suction pressure on the suction device and make the suction process faster and smoother.

[0111] In one specific embodiment, "suction pressure greater than or equal to preset pressure" includes:

[0112] The suction device aspirated a foreign object, which blocked the suction tube. Understandably, the foreign object is a semi-solid gel and can deform.

[0113] "The suction pressure on the moved suction device is less than the preset pressure within a preset time" includes:

[0114] Within a preset time, the foreign object deforms and passes through the suction tube, causing the suction pressure on the suction device to fall below the preset pressure. This is understood as follows: when the suction device draws in a semi-solid, gel-like foreign object, the suction position shifts, the foreign object deforms, and it can be slowly drawn into the suction tube and then into filter 3. Once the foreign object has entered filter 3, the suction pressure on the suction device is lower than the preset pressure. The suction pressure can also be reduced to a lower pressure within a short time, such as within 3 or 4 seconds.

[0115] In this application, after the suction position of the moving suction device is reached, the foreign object in the body fluid is deformed, and the deformed foreign object can enter the suction device, which can reduce the suction pressure on the suction device and make the suction process faster and smoother.

[0116] In one specific embodiment, the aspiration method further includes:

[0117] If the suction pressure on the moved suction device is greater than or equal to the preset pressure within a preset time, the suction of body fluid will stop. It is understood that if the foreign object is solid and completely blocks the suction catheter, even moving the suction position of the device will not deform the foreign object or allow it to enter the suction device.

[0118] In this application, after the suction position of the moving suction device is moved, the foreign objects in the body fluid do not deform. The movement of the suction position of the suction device cannot allow the foreign objects to enter the suction device. This requires the suction device to be removed, the suction device to be cleaned, and the body fluid to be suctioned again.

[0119] Please see Figure 15 The present invention also provides an aspiration method for aspirating bodily fluids and separating foreign matter from the bodily fluids, comprising:

[0120] A1, a suction device is provided. It is understood that the suction device can be the suction device described above. The suction device includes: a suction pump assembly 1, a collection bag 2, a suction conduit, and a filter 3, with the suction conduit, filter 3, suction pump assembly 1, and collection bag 2 connected in sequence. The suction device may also include a syringe 9.

[0121] A2, control the aspiration device to aspirate body fluids. It is understood that body fluids can be aspirated using the aspiration pump assembly 1; alternatively, the aspiration pump assembly 1 and syringe 9 can be controlled to aspirate body fluids synchronously.

[0122] A3, filtering bodily fluids to separate foreign matter from the fluids. It is understood that this application can use a suction device to filter the bodily fluids, such as filter 3. This application can also use an external filtration device to filter the bodily fluids.

[0123] The aspiration method of this application separates bodily fluids from foreign matter by aspirating and filtering the fluids. The separated foreign matter can be analyzed and observed, and the filtered bodily fluids can be stored in a collection bag 2. This application solves the technical problem of not being able to filter bodily fluids to separate foreign matter.

[0124] In one specific embodiment, the aspiration method further includes:

[0125] The display shows the suction pressure of the suction device. It is understood that the pressure of the suction device can be displayed as the pressure on the suction pump assembly 1, the pressure on the syringe 9, or the pressure on both the suction pump assembly 1 and the syringe 9 simultaneously.

[0126] In this application, by displaying the suction pressure on the suction pump assembly 1, the suction status of the suction device can be fed back, such as whether the suction is currently smooth or whether a blockage has occurred, so that the operator can intuitively perceive and determine whether the position of the suction device needs to be adjusted, and whether an auxiliary pressure source needs to be added for suction, such as whether a syringe 9 needs to be added for suction.

[0127] In one specific embodiment, "displaying the suction pressure of the suction device" includes:

[0128] Set up a correspondence between multiple pressure ranges and multiple display parameters, where different display parameters are used to characterize different pressure ranges;

[0129] The corresponding display parameters are displayed according to the current pressure range of the suction device.

[0130] In this application, by setting different display parameters to display different pressure ranges, the current suction pressure of the suction device can be displayed more intuitively, so that the operator can know the current suction status.

[0131] In one specific embodiment, the display parameters include the number of indicator lights 132 illuminated; "displaying the corresponding display parameters according to the current pressure range of the suction device" includes:

[0132] Based on the current pressure range of the suction device, a corresponding number of indicator lights 132 are illuminated. In this embodiment, the current pressure can be determined by the number of illuminated indicator lights 132, thereby determining the suction status and providing a basis for adjusting the position of the suction device.

[0133] In one specific embodiment, the display parameters include the illuminated area of ​​the indicator light 132; "displaying the corresponding display parameters according to the current pressure range of the suction device" includes:

[0134] The corresponding area of ​​indicator light 132 is illuminated according to the current pressure range of the suction device.

[0135] This embodiment can accurately determine the current suction status based on the area illuminated by the indicator light 132, providing a basis for adjusting the position of the suction device.

[0136] In one specific embodiment, the display parameters include the illumination color of the indicator light 132; "displaying the corresponding display parameters according to the current pressure range of the suction device" includes:

[0137] The indicator light 132 will illuminate in the corresponding color according to the current pressure range of the suction device.

[0138] This embodiment can accurately determine the current suction status based on the color of the indicator light 132, providing a basis for adjusting the position of the suction device.

[0139] In one specific embodiment, "controlling the aspiration device to aspirate body fluids" includes:

[0140] The body fluid is aspirated using a primary pressure source. Understandably, this means that the primary pressure source is used when the aspiration process is relatively smooth. The primary pressure source can be the aspiration pump assembly 1.

[0141] In one specific embodiment, "controlling the aspiration device to aspirate body fluids" includes:

[0142] When the suction pressure from the primary pressure source is insufficient to meet the suction requirements, a secondary pressure source is used to assist in aspirating body fluids. This is understandable; a secondary pressure source can be used to assist aspiration when the aspiration process is not smooth, or when it is necessary to increase the instantaneous suction force, or when it is necessary to accelerate the aspiration speed. The auxiliary pressure source can be a syringe 9.

[0143] In one specific embodiment, "controlling the aspiration device to aspirate body fluids" includes:

[0144] When the suction pressure is greater than or equal to the preset pressure, move the suction position of the suction device.

[0145] If the suction pressure on the moved suction device is less than the preset pressure within a preset time, the body fluid will continue to be suctioned.

[0146] In this application, when the suction pressure on the suction device is greater than or equal to a preset pressure, the suction position of the suction device is moved. If, within a preset time, the pressure on the suction device falls below the preset pressure, suction of the body fluid continues. This allows the suction process to continue even when suction is not smooth, by adjusting the position of the suction device. The adjustment of the suction process is simple and quick.

[0147] In one specific embodiment, "controlling the aspiration device to aspirate body fluids" includes:

[0148] When the suction pressure is greater than or equal to the preset pressure, move the suction position of the suction device.

[0149] If the suction pressure on the moved suction device is greater than or equal to the preset pressure within a preset time, the suction of body fluid will stop. It is understood that if the foreign object is solid and completely blocks the suction catheter, even moving the suction position of the device will not deform the foreign object or allow it to enter the suction device.

[0150] In this application, after the suction position of the moving suction device is moved, the foreign objects in the body fluid do not deform. The movement of the suction position of the suction device cannot allow the foreign objects to enter the suction device. This requires the suction device to be removed, the suction device to be cleaned, and the body fluid to be suctioned again.

[0151] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A suction device for aspirating bodily fluids and separating foreign matter from the bodily fluids, characterized in that, include: The system includes a suction pump assembly, a collection bag, a suction conduit, and a filter. The suction conduit, the filter, the suction pump assembly, and the collection bag are connected in sequence. The suction pump assembly is used to provide suction pressure to the body fluid so that the body fluid flows through the suction conduit and enters the filter. After the body fluid is separated from the foreign matter in the filter, it enters the collection bag through the suction pump assembly. The filter includes a housing and a filter membrane. The housing has a receiving space, an inlet, and an outlet. The inlet and outlet are opposite to each other and are connected to the receiving space. The filter membrane is housed within the receiving space and engaged with the inner circumferential surface of the housing. The filter membrane includes a first connecting end and a second connecting end, which are opposite to each other. Under the combined action of the body fluid flow and the gravitational potential energy of the foreign object, the foreign object accumulates at the second connecting end. The inlet is eccentrically positioned and close to the first connecting end. The outlet is eccentrically positioned and close to the first connection end; the body fluid is used to enter the containing space from the inlet, filter foreign matter through the filter membrane, and then discharge from the outlet.

2. The suction device according to claim 1, characterized in that, The suction device further includes a first connecting pipe and a second connecting pipe, the first connecting pipe being connected between the suction conduit and the filter, and the second connecting pipe being connected between the collection bag and the suction pump assembly.

3. The suction device according to claim 2, characterized in that, The suction device further includes a connector, which is installed at the end of the first connecting tube away from the filter, and is used to connect the suction conduit to the first connecting tube.

4. The suction device according to claim 1, characterized in that, The suction device also includes a power source and a switch. The power source is connected to the suction pump assembly and is used to provide power to the suction pump assembly. The switch is located on the suction pump assembly and is used to control the suction pump assembly to turn on or off.

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