Infusion tube blockage detection method for infusion pump and infusion pump

Abstract

The application provides an infusion tube blockage detection method and an infusion pump, and relates to the technical field of medical treatment. The injection pump comprises a shell, a pumping assembly, a pressure sensor and a processing module. The infusion pump detects the first pressure of the first position of the infusion tube before the infusion pump is turned on through the first pressure sensor, and the first pressure sensor can also detect the second pressure of the first position after the infusion pump is turned on. The processing module judges the pressure difference between the first pressure and the second pressure and the size of the first preset pressure, so that the processing module can determine whether the pressure of the first position of the infusion tube has a significant change. If the pressure of the first position of the infusion tube changes significantly, it indicates that the fluid in other parts of the infusion tube cannot be pumped to the first position, thereby indicating that the infusion tube has a blocked part.

Description

TECHNICAL FIELD

[0001] The application relates to an infusion tube blockage detection method of an infusion pump and the infusion pump, and belongs to the technical field of medical treatment. BACKGROUND

[0002] As a conventional medical instrument, the infusion pump has been widely applied in modern medical treatment. The infusion pump needs to be used together with an infusion device. However, the medical workers often forget to open the roller of the infusion device when operating the infusion pump, so that the infusion function is not correctly realized.

[0003] At present, the method for detecting whether the infusion tube is blocked mainly comprises manually observing the liquid level in an infusion bag. Such a detection method depends on manual operation and is relatively complicated. Especially when the infusion tube is used for low-flow infusion, it takes a longer time to learn whether the infusion tube is blocked. SUMMARY

[0004] The application provides an infusion tube blockage detection method of an infusion pump and the infusion pump, and solves the problems that the current infusion tube blockage detection method of the infusion pump is complicated and inefficient.

[0005] In a first aspect, the application provides an infusion pump, comprising:

[0006] a housing having a mounting position for placing an infusion tube;

[0007] a pumping assembly arranged in the housing and cooperating with the infusion tube;

[0008] a first pressure sensor arranged in the mounting position, the first pressure sensor being capable of detecting a first pressure of a first position of the infusion tube before the infusion pump is turned on and a second pressure of the first position after the infusion pump is turned on, the first position being located between a liquid inlet end of the infusion tube and the pumping assembly;

[0009] a processing module electrically connected with the pumping assembly and the first pressure sensor, the processing module being capable of receiving the first pressure and the second pressure, and comparing a difference between the first pressure and the second pressure with a first preset pressure;

[0010] When the difference between the first pressure and the second pressure is greater than the first preset pressure, the processing module determines that the infusion pump is in a blocked state.

[0011] In some embodiments, a liquid stopping member is further arranged in the housing, and the liquid stopping member is capable of opening and closing a liquid outlet end of the infusion tube.

[0012] In some embodiments, a second pressure sensor is further included, which is arranged at the mounting position and electrically connected to the processing module, the second pressure sensor can detect a third pressure of a second position of the infusion tube before the infusion pump is turned on and a fourth pressure of the second position after the infusion pump is turned on, and the processing module can compare the third pressure and the fourth pressure;

[0013] When the pressure difference between the third pressure and the fourth pressure is greater than a second preset pressure, the processing module determines that the liquid outlet end is blocked by the liquid stopper;

[0014] The second position is located between the liquid outlet end of the infusion tube and the pumping assembly.

[0015] In some embodiments, the liquid stopper is an electric liquid stopper, and the liquid stopper is connected to the processing module.

[0016] In some embodiments, an in-position sensor is further included, which is connected to the processing module, and the in-position sensor is arranged at the mounting position, and the processing module determines that the infusion tube is located at the mounting position through the in-position sensor;

[0017] When the processing module determines that the infusion tube is located at the mounting position, the processing module controls the liquid stopper to block the liquid outlet end of the infusion tube.

[0018] In some embodiments, when the difference between the first pressure and the second pressure is less than the first preset pressure, the processing module determines that the infusion pump is in a unblocked state, the processing module can control the pumping assembly to adjust the pressure of the second position to a fifth pressure, and then the processing module controls the liquid stopper to open the liquid outlet end of the infusion tube;

[0019] The infusion pump has an infusion mode and a pumping mode, wherein, when the infusion pump is in the infusion mode, the fifth pressure is less than the third pressure;

[0020] When the infusion pump is in the pumping mode, the fifth pressure is greater than the third pressure.

[0021] In a second aspect, the application provides a method for detecting blockage of an infusion tube of an infusion pump, which is applied to the infusion pump described above, and the method comprises the following steps:

[0022] Obtaining a first pressure of a first position of the infusion tube before the infusion pump is turned on;

[0023] Obtaining a second pressure of the first position of the infusion tube after the infusion pump is turned on;

[0024] Obtaining a pressure difference between the first pressure and the second pressure;

[0025] determining a pressure difference between the first pressure and the second pressure and a first preset pressure;

[0026] when the pressure difference between the first pressure and the second pressure is greater than the first preset pressure, determining that the infusion tube is in an occlusion state.

[0027] In some embodiments, before the first pressure of the first position of the infusion tube is acquired, the infusion tube occlusion detection method of the infusion pump further comprises:

[0028] blocking a liquid outlet end of the infusion tube;

[0029] determining whether the liquid outlet end of the infusion tube is in a blocked state.

[0030] In some embodiments, the determining whether the liquid outlet end of the infusion tube is in a blocked state comprises:

[0031] acquiring a third pressure of a second position of the infusion tube before the infusion pump is turned on;

[0032] acquiring a fourth pressure of the second position of the infusion tube after the infusion pump is turned on;

[0033] acquiring a pressure difference between the third pressure and the fourth pressure;

[0034] determining a pressure difference between the third pressure and the fourth pressure and a second preset pressure;

[0035] when the pressure difference between the third pressure and the fourth pressure is greater than the second preset pressure, determining that the liquid outlet end is in a blocked state.

[0036] In some embodiments, the infusion pump has an infusion mode and a suction mode; when the infusion pump is in the infusion mode and the pressure difference between the first pressure and the second pressure is less than the first preset pressure, the infusion tube occlusion detection method of the infusion pump further comprises:

[0037] adjusting the pressure of the second position to a fifth pressure;

[0038] opening the liquid outlet end;

[0039] wherein, when the infusion pump is in the infusion mode, the fifth pressure is less than the third pressure;

[0040] when the infusion pump is in the suction mode, the fifth pressure is greater than the third pressure.

[0041] In some embodiments, before the first pressure of the first position of the infusion tube before the infusion pump is turned on, the infusion tube blockage detection method of the infusion pump further comprises:

[0042] acquiring position detection information of a mounting position of the infusion pump;

[0043] determining, according to the position detection information, that the infusion tube is located at the mounting position of the infusion pump;

[0044] performing the step of acquiring the first pressure

[0045] The infusion pump of the present application detects the first pressure of the first position of the infusion tube before the infusion pump is turned on through the first pressure sensor, and the first pressure sensor can also detect the second pressure of the first position after the infusion pump is turned on. By processing the pressure difference between the first pressure and the second pressure and the size of the first preset pressure, the processing module can determine whether the pressure of the first position of the infusion tube has changed significantly. If the pressure of the first position of the infusion tube changes significantly, it indicates that the fluid in other parts of the infusion tube cannot be pumped to the first position, thereby indicating that there is a blocked part in the infusion tube. BRIEF DESCRIPTION OF DRAWINGS

[0046] The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description of the embodiments of the present application taken in conjunction with the accompanying drawings. In the drawings, various embodiments of the present application are illustrated by way of example and not limitation in which:

[0047] Figure 1 It is a perspective view of the internal structure of the infusion pump of the embodiments of the present application;

[0048] Figure 2 It is a perspective view of the infusion pump of the embodiments of the present application with the pump door closed;

[0049] Figure 3 It is a schematic view of the pumping assembly of the embodiments of the present application;

[0050] Figure 4 It is a flowchart of the infusion tube blockage detection method of the infusion pump of the embodiments of the present application;

[0051] Figure 5 It is a flowchart of the infusion tube blockage detection method S900-S1300 of the infusion pump of the embodiments of the present application;

[0052] Figure 6 It is a flowchart of the infusion tube blockage detection method S300-S800 of the infusion pump of the embodiments of the present application;

[0053] Figure 7 It is a flowchart of the infusion tube blockage detection method S1400-S1600 of the infusion pump of the embodiments of the present application;

[0054] Figure 8 Flowchart of the infusion tube blockage detection method S100-S200 of the infusion pump of the embodiment of the present application.

[0055] Reference signs:

[0056] 100 - housing, 110 - mounting position, 120 - pump door,

[0057] 200 - infusion tube, 210 - liquid inlet end, 220 - liquid outlet end,

[0058] 300 - pumping assembly, 310 - driving part, 320 - extruding part,

[0059] 400 - first pressure sensor,

[0060] 500 - liquid stopper,

[0061] 600 - second pressure sensor,

[0062] 700 - in-position sensor. DETAILED DESCRIPTION

[0063] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and are not to be understood as limiting the present application.

[0064] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not to indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0065] In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0066] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and like terms should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0067] In this application, unless otherwise clearly indicated and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0068] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0069] As a conventional medical device, infusion pump has been widely used in modern medicine. The infusion pump needs to be used with an infusion device. A roller is arranged on the infusion tube, and the roller can control the on-off of the infusion tube. Before inserting the needle of the infusion tube into the patient's body, the medical staff needs to close the roller and manually or through the machine to empty the air in the infusion tube. In this way, when the needle of the infusion tube is inserted into the user's body, the roller and the infusion pump are opened, and the liquid medicine in the medicine bottle can be injected into the patient's body through the infusion tube. Then, when the medical staff operates the infusion pump, they sometimes forget to open the roller of the infusion device, which causes the infusion tube to be cut off. In this way, the liquid medicine cannot flow through the infusion tube, and the infusion pump cannot correctly realize the infusion function.

[0070] At present, the method for detecting whether the infusion tube is blocked mainly is through artificial observation of the liquid level in the infusion bag. Such detection method depends on manual operation and is relatively cumbersome. Especially when the infusion tube is in low flow infusion, it needs longer time to know whether the infusion tube is blocked.

[0071] The infusion pump provided by the application detects the first pressure of the first position of the infusion tube before the infusion pump is turned on through the first pressure sensor, and the first pressure sensor can also detect the second pressure of the first position after the infusion pump is turned on. The processing module judges the pressure difference between the first pressure and the second pressure and the size of the first preset pressure, so that the processing module can determine whether the pressure of the first position of the infusion tube has a significant change. If the pressure of the first position of the infusion tube changes significantly, it indicates that the fluid in other parts of the infusion tube cannot be pumped to the first position, thereby indicating that there is a blocked part in the infusion tube.

[0072] The infusion pump provided by the application will be described in detail below in combination with specific embodiments.

[0073] The embodiment of the application provides an infusion pump, which refers to Figures 1-4 , comprising a shell 100, a pumping assembly 300, a first pressure sensor 400 and a processing module. The infusion pump can be used for pumping the fluid in the infusion tube 200.

[0074] The shell 100 is the basic component of the infusion pump of the application. The shell 100 can provide a mounting base for other at least partial components of the infusion pump of the application, and can protect other at least partial components of the infusion pump. The shell 100 can be made of metal or composite material. The shell 100 made of metal has better structural strength, and the heat generated by the components in the shell 100 is more easily conducted outward through the shell 100. The shell 100 made of composite material has relatively light weight, thereby making the injection assembly of the application and the overall weight of the injection pump using the injection assembly relatively light. In the embodiment of the application, the specific material of the shell 100 is not limited.

[0075] The shell 100 is provided with a mounting position 110, which can be used for placing the infusion tube 200. The shell 100 can be provided with a cavity, and the mounting position 110 can be located in the cavity. Therefore, when the infusion tube 200 is placed on the mounting position 110, at least part of the infusion tube 200 is located in the shell 100. Specifically, the mounting position 110 can be a groove formed in the cavity of the shell 100. The groove cooperates with the infusion tube 200, so that the infusion tube 200 can be embedded in the groove. In this way, the infusion tube 200 can be kept stable when it is placed on the mounting position 110. Of course, the mounting position 110 can also be provided on the surface of the shell 100. In this way, when the infusion tube 200 is placed on the mounting position 110, the infusion tube 200 is located on the surface of the shell 100.

[0076] The pumping assembly 300 is also disposed in the housing 100, specifically, the pumping assembly 300 can be disposed in the housing 100 and cooperates with the infusion tube 200, the pumping assembly 300 can pump the fluid in the infusion tube 200, when the liquid inlet end 210 of the infusion tube 200 is connected with the medicine bottle, the pumping assembly 300 can deliver the liquid in the infusion tube 200 from the liquid inlet end 210 to the liquid outlet end 220 of the infusion tube 200; or, when the liquid outlet end 220 of the infusion tube 200 is connected with the medicine bottle, the pumping assembly 300 can deliver the liquid in the infusion tube 200 from the liquid outlet end 220 to the liquid inlet end 210 of the infusion tube 200. Of course, the pumping assembly 300 can also pump the external fluid into the infusion tube 200 through the liquid outlet end 220 of the infusion tube 200. The part of the pumping assembly 300 cooperating with the infusion tube 200 can cut off the infusion tube 200, specifically, when the infusion tube 200 is cut off by the pumping assembly 300, the liquid in the infusion tube 200 cannot completely pass through the infusion pump.

[0077] The first pressure sensor 400 is disposed in the housing 100 and located on the mounting position 110 of the housing 100, thus when the infusion tube 200 is placed on the mounting position 110 of the housing 100, the first pressure sensor 400 can detect the pressure in the infusion tube 200, specifically, the first pressure sensor 400 can detect the pressure of the first position of the infusion tube 200, the first position of the infusion tube 200 is the part between the liquid inlet end 210 of the infusion tube 200 and the pumping assembly 300 after the infusion tube 200 is mounted on the mounting position 110. Specifically, the first pressure sensor 400 can be disposed on the mounting position 110, the first pressure sensor 400 is located between the liquid inlet end 210 of the infusion tube 200 and the pumping assembly 300, so that the first pressure sensor 400 contacts the part of the infusion tube 200 between the liquid inlet end 210 of the infusion tube 200 and the pumping assembly 300, so that the first pressure sensor 400 can detect the pressure of the part of the infusion tube 200.

[0078] The processing module is connected with the pumping assembly 300 and the first pressure sensor 400, and can control the pumping assembly 300 and the first pressure sensor 400 to be turned on, so that the pumping assembly 300 can deliver the fluid in the infusion tube 200, and the first pressure sensor 400 can detect the pressure in the infusion tube 200. Specifically, after the infusion tube 200 is installed on the installation site 110, the processing module can control the first pressure sensor 400 to detect the first pressure at the first position of the infusion tube 200 before the infusion pump is turned on. When the pumping assembly 300 is turned on and the infusion pump is in the infusion mode, the pumping assembly 300 can make the fluid in the infusion tube 200 flow in the direction from the liquid inlet end 210 to the liquid outlet end 220 of the infusion tube 200, so that the fluid at the first position of the infusion pump can flow to the position between the liquid outlet end 220 of the infusion tube 200 and the pumping assembly 300. The processing module can also detect the second pressure at the first position of the infusion tube 200 after the pumping assembly 300 is turned on, and compare the pressure difference between the first pressure and the second pressure with the first preset pressure to determine whether the infusion tube 200 is in the blocked state.

[0079] Specifically, the infusion tube 200 can be provided with a first tube portion, a second tube portion and a third tube portion, wherein the first tube portion is the portion of the infusion tube 200 from the liquid inlet end 210 to the roller of the infusion tube 200, the second tube portion is the portion of the infusion tube 200 from the roller to the pumping assembly 300, and the third tube portion is the portion of the infusion tube 200 from the pumping assembly 300 to the liquid outlet end 220 of the infusion tube 200, and the first position of the infusion tube 200 is located in the second tube portion. When the user sets the roller of the infusion tube 200 to the flow-stopping state, so that the roller of the infusion tube 200 is in the blocked state, and the first tube portion and the second tube portion of the infusion tube 200 are filled with the drug solution, before the pumping assembly 300 is turned on, the first pressure detected by the first pressure sensor 400 at the first position of the infusion tube 200 is relatively high, and when the pumping assembly 300 is turned on and the pumping assembly 300 is in the infusion mode, at least part of the drug solution in the second tube portion can be pumped to the third tube portion, so that the drug solution in the second tube portion is reduced, and because the drug solution in the first tube portion cannot be supplemented to the second tube portion through the blocked roller, the second pressure detected by the first pressure sensor 400 at the first position at this time is less than the first pressure, and when the pressure difference between the first pressure and the second pressure reaches the preset value, the processing module can determine that the infusion tube 200 is in the blocked state.

[0080] When the user sets the roller of the infusion tube 200 to the stop-flow state, so that the roller of the infusion tube 200 is in the blocked state, and the second tube part and the third tube part of the infusion tube 200 are both filled with the liquid medicine, before the pumping assembly 300 is started, the first pressure detected by the first pressure sensor 400 at the first position of the infusion tube 200 is the normal pressure, after the pumping assembly 300 is started and in the liquid extraction mode, at least part of the liquid medicine in the third tube part can be pumped to the second tube part, so that the liquid medicine in the third tube part is reduced, and because the liquid medicine in the second tube part cannot pass through the blocked roller, the liquid medicine in the second tube part cannot be delivered to the first tube part, so that the liquid medicine is concentrated in the second tube part, at this time, the second pressure detected by the first pressure sensor 400 at the first position is greater than the first pressure, and when the pressure difference between the first pressure and the second pressure reaches the first preset pressure, the processing module can determine that the infusion tube 200 is in the blocked state.

[0081] It should be understood that if the liquid medicine in the infusion tube 200 fluctuates, the first pressure and the second pressure may also be slightly different, in order to exclude the influence of such fluctuations, by comparing the pressure difference between the first pressure and the second pressure with the first preset pressure, the case that the pressure difference between the first pressure and the second pressure is large can be relatively accurately determined whether the infusion tube 200 is blocked.

[0082] In addition, it should also be understood that when the infusion tube 200 of the present application is not connected with the medicine bottle, the pumping assembly 300 can pump the air in the infusion tube 200 after being started. Specifically, when the pumping assembly 300 is in the infusion mode, the pumping assembly 300 can pump the air in the second tube part to the third tube part, if the roller of the infusion tube 200 is in the stop-flow state, the fluid in the first tube part cannot be delivered to the second tube part through the blocked roller, the air pressure in the second tube part decreases, so that the pressure difference between the second tube part before and after the pumping assembly 300 is started is greater than the first preset pressure, which can also determine that the infusion tube 200 is in the blocked state. Or the pumping assembly 300 is in the liquid extraction mode after being started, the pumping assembly 300 can pump the air in the third tube part to the second tube part, if the roller of the infusion tube 200 is in the stop-flow state, the gas in the second tube part cannot pass through the blocked roller to the first tube part, so that the air pressure in the second tube part increases, the pressure difference between the second tube part before and after the pumping assembly 300 is started is greater than the first preset pressure, which can also determine that the infusion tube 200 is in the blocked state.

[0083] When the processing module determines that the infusion tube 200 is in the blocked state, the pumping assembly 300 can be turned off, and the processing module can also issue an alarm prompt, so that the user can clearly know whether the infusion tube 200 is in the blocked state.

[0084] Of course, it should also be understood that when the infusion tube 200 is blocked due to its own quality problem, the infusion pump of the present application can also detect that the infusion tube 200 is in a blocked state after the infusion tube 200 is installed on the installation site 110.

[0085] In some embodiments, the pumping assembly 300 of the present application can specifically adopt a peristaltic pump. Specifically, the pumping assembly 300 includes a driving part 310 and a plurality of squeezing parts 320, the plurality of squeezing parts 320 are connected with the driving part 310, the pumping assembly 300 has a first end adjacent to the liquid inlet end 210 of the infusion tube 200, and a second end away from the liquid inlet end 210 of the infusion tube 200, the plurality of squeezing parts 320 are distributed along the direction from the first end to the second end, the driving part 310 is configured to drive the plurality of squeezing parts 320 to sequentially squeeze the infusion tube 200 along the direction from the first end to the second end, or along the direction from the second end to the first end, and at least one of the plurality of squeezing parts 320 blocks the infusion tube 200. When the plurality of squeezing parts 320 sequentially squeeze the infusion tube 200 along the direction from the first end to the second end, the liquid in the infusion tube 200 can flow along the direction from the first end to the second end, so that the fluid in the infusion tube 200 can flow from the liquid inlet end 210 to the liquid outlet end 220; when the plurality of squeezing parts 320 sequentially squeeze the infusion tube 200 along the direction from the second end to the first end, the liquid in the infusion tube 200 can flow along the direction from the second end to the first end, so that the fluid in the infusion tube 200 can flow from the liquid outlet end 220 to the liquid inlet end 210.

[0086] Specifically, the driving part 310 is a structure in which the output end of the motor is connected with a long shaft, the squeezing parts 320 can be eccentric wheels, the plurality of eccentric wheels are sleeved on the long shaft, and at least part of adjacent squeezing parts 320 are arranged in a staggered manner in the axial direction of the long shaft, so that when the driving part 310 drives the plurality of eccentric wheels to rotate, the plurality of eccentric wheels can sequentially squeeze the infusion tube 200, and in this process, at least one eccentric wheel of the plurality of eccentric wheels fully squeezes the infusion tube 200, so that the part of the infusion tube 200 in contact with the eccentric wheel is cut off. In this way, by controlling the rotation direction of the driving part 310, the plurality of eccentric wheels can sequentially squeeze the infusion tube 200 along the direction from the first end to the second end, or along the direction from the second end to the first end, so that the pumping assembly 300 can realize the infusion mode or the suction mode.

[0087] In some embodiments, the infusion pump of the present application can further comprise a liquid-stopping member 500, which can be arranged on the mounting position 110 and correspond to the liquid outlet end 220 of the infusion tube 200, so that the liquid-stopping member 500 can block the liquid outlet end 220 of the infusion tube 200, and thus the liquid in the infusion tube 200 cannot be discharged to the outside of the infusion tube 200 through the liquid outlet end 220. Specifically, when the infusion tube 200 is mounted on the mounting position 110, the liquid-stopping member 500 can block the liquid outlet end 220 of the infusion tube 200, so that when the pumping assembly 300 is turned on and in the infusion mode, the liquid-stopping member 500 blocking the liquid outlet end 220 of the infusion tube 200 can prevent the liquid in the infusion tube 200 from being directly discharged through the liquid outlet end 220 of the infusion tube 200. In particular, when the needle of the infusion tube 200 is inserted into the body of the user, the liquid in the infusion tube 200 cannot be directly input into the body of the user through the liquid outlet end 220 of the infusion tube 200, which ensures the safety of the infusion.

[0088] In some embodiments, the infusion pump of the present application further comprises a second pressure sensor 600 connected to the processing module, which can also be arranged on the mounting position 110 of the housing 100, so that when the infusion tube 200 is placed on the mounting position 110 of the housing 100, the second pressure sensor 600 can detect the pressure in the infusion tube 200. Specifically, the second pressure sensor 600 can detect the pressure at the second position of the infusion tube 200, which is the part between the liquid outlet end 220 of the infusion tube 200 and the pumping assembly 300, i.e., the third tube portion of the infusion tube 200. Specifically, the second pressure sensor 600 is located between the liquid outlet end 220 of the infusion tube 200 and the pumping assembly 300, so that the second pressure sensor 600 is in contact with the part of the infusion tube 200 between the liquid outlet end 220 of the infusion tube 200 and the pumping assembly 300, so that the second pressure sensor 600 can detect the pressure at this part of the infusion tube 200.

[0089] When the user blocks the liquid outlet end 220 of the infusion tube 200 by the liquid blocking member 500, it is not certain whether the liquid blocking member 500 correctly blocks the liquid outlet end 220 of the infusion tube 200. If the user operates incorrectly or the infusion pump malfunctions, the liquid blocking member 500 can not correctly block the liquid outlet end 220 of the infusion tube 200, so that the fluid can be discharged through the liquid outlet end 220 of the infusion tube 200 or the fluid outside the infusion tube 200 can enter the infusion tube through the liquid outlet end 220. Therefore, after blocking the liquid outlet end 220 of the infusion tube 200 by the liquid blocking member 500, it is necessary to determine whether the liquid outlet end 220 of the infusion tube 200 is in a blocked state. Therefore, the processing module can control the second pressure sensor 600 to obtain a third pressure of the second position of the infusion tube 200 before the pumping assembly 300 is turned on and a fourth pressure of the third position of the infusion tube 200 after the pumping assembly 300 is turned on, and the processing module can compare the difference between the third pressure and the fourth pressure with a second preset pressure. When the difference between the third pressure and the fourth pressure is greater than the second preset pressure, it can be determined whether the output end of the infusion tube 200 is in a completely blocked state, that is, whether the liquid blocking member 500 correctly blocks the infusion tube 200, so as to determine whether the liquid outlet end 220 of the infusion tube 200 is in a blocked state.

[0090] Specifically, after the user blocks the liquid outlet end 220 of the infusion tube 200 by the liquid blocking member 500, if the liquid outlet end 220 of the infusion tube 200 is correctly blocked, the third pressure of the second position of the infusion tube 200 before the pumping assembly 300 is turned on detected by the second pressure sensor 600 can be transmitted to the processing module. When the pumping assembly 300 is started and in the infusion mode, the pumping assembly 300 can pump at least part of the fluid in the second tube portion of the infusion tube 200 into the third tube portion, and since the liquid outlet end 220 connected with the third tube portion is blocked, the gas will accumulate in the third tube portion, so that the pressure of the third tube portion increases. Thus, the second pressure sensor 600 can detect that the pressure of the second position of the infusion tube 200 located in the third tube portion increases, and the increase of the pressure of the second position of the infusion tube 200 is the fourth pressure. When the increase of the pressure of the second position of the infusion tube 200 is greater than the second preset pressure, it can be determined that the liquid outlet end 220 of the infusion tube 200 is correctly blocked.

[0091] If the liquid outlet end 220 of the infusion tube 200 is not correctly blocked, when the pumping assembly 300 is turned on and in the infusion mode, the pumping assembly 300 can also pump the fluid in the second tube portion into the third tube portion, but the fluid in the third tube portion can also be discharged through the liquid outlet end 220 of the infusion tube 200, so that the air pressure in the third tube portion does not increase or increases slightly, that is, the difference between the third pressure and the fourth pressure is less than the second preset pressure. Thus, it can be indicated that the liquid blocking member 500 does not correctly block the liquid outlet end 220 of the infusion tube 200.

[0092] In addition, when the pumping assembly 300 is turned on and in the liquid pumping mode, the pumping assembly 300 can pump the fluid in the third tube portion to the second tube portion. If the liquid outlet end 220 of the infusion tube 200 is properly blocked, the fluid in the third tube portion will be reduced, resulting in a decrease in the pressure in the third tube portion. The fluid outside the infusion tube 200 cannot be supplemented into the third tube portion through the liquid outlet end 220, i.e., the fourth pressure at the second position of the infusion tube 200 is lower than the third pressure. When the difference between the third pressure and the fourth pressure is greater than the second preset pressure, it can be determined that the liquid outlet end 220 of the infusion tube 200 is properly blocked.

[0093] Correspondingly, if the liquid outlet end 220 of the infusion tube 200 is not properly blocked, when the pumping assembly 300 is turned on and in the liquid pumping mode, after the fluid in the third tube portion is pumped into the second tube portion, the fluid outside the infusion tube 200 can be supplemented into the third tube portion through the liquid outlet end 220, so that the pressure in the third tube portion will not decrease or decrease to a small extent, i.e., the difference between the third pressure and the fourth pressure is less than the second preset pressure, thereby determining that the liquid outlet end 220 of the infusion tube 200 is not properly blocked.

[0094] In some embodiments, the processing module of the present application is connected with the pumping assembly 300, so that the processing module can control the pumping assembly 300 to be in the liquid infusion mode or the liquid pumping mode. When the processing module compares the pressure difference between the first pressure and the second pressure with the first preset pressure, and the pressure difference between the first pressure and the second pressure is less than the first preset pressure, the processing module can determine that the infusion tube 200 is in the unobstructed state.

[0095] Specifically, when the pumping assembly 300 is turned on and in the liquid infusion mode, because the liquid stopper 500 blocks the liquid outlet end 220 of the infusion tube 200, the pressure in the third tube portion of the infusion tube 200 is relatively large. If the infusion tube 200 has been connected with a medicine bottle, and the needle end of the infusion tube 200 has been inserted into the patient's body, the liquid pressure of the medicine liquid in the third tube portion is relatively large at this time. If the liquid stopper 500 is directly opened to open the liquid outlet end 220 of the infusion tube 200, the medicine liquid with relatively large liquid pressure will be directly injected into the patient's body through the needle of the infusion tube 200, which is easy to cause danger. Therefore, when the processing module determines that the infusion tube 200 is in the unobstructed state, the processing module can control the pumping assembly 300 to switch to the liquid pumping mode, so that the medicine liquid in the third tube portion can flow back to the second tube portion to reduce the liquid pressure in the third tube portion, thereby reducing the pressure at the second position of the infusion tube 200 to the fifth pressure. After the pressure at the second position of the infusion tube 200 returns to the fifth pressure, the liquid stopper 500 is opened to open the liquid outlet end 220 of the infusion tube 200, and the medicine liquid in the third tube portion will not directly rush into the patient's body, thereby ensuring the safety of the patient.

[0096] When the pumping assembly 300 is in the liquid extraction mode, the liquid outlet end 220 of the infusion tube 200 is blocked by the liquid stopper 500, so the pressure in the third tube portion of the infusion tube 200 is small. If the infusion tube 200 is connected with the medicine bottle and the needle end of the infusion tube 200 is inserted into the patient's body, the pressure in the third tube portion is smaller than the pressure in the patient's body. If the liquid stopper 500 is directly opened to open the liquid outlet end 220 of the infusion tube 200, the blood of the patient may be sucked into the third tube portion, which is dangerous. Therefore, when the processing module determines that the infusion tube 200 is in the unobstructed state, the processing module can control the pumping assembly 300 to switch to the infusion mode, so that the liquid in the second tube portion can flow back to the third tube portion to increase the hydraulic pressure in the third tube portion, thereby increasing the pressure at the second position of the infusion tube 200 to the fifth pressure. After the pressure at the second position of the infusion tube 200 returns to the fifth pressure, the liquid stopper 500 is opened to open the liquid outlet end 220 of the infusion tube 200, and the blood in the patient's body will not be sucked into the third tube portion, thereby ensuring the safety of the patient.

[0097] In some embodiments, the infusion pump of the present application further comprises an in-place sensor 700, wherein the in-place sensor 700 can be arranged on the mounting position 110 of the housing 100 and electrically connected with the processing module. When the infusion tube 200 is mounted on the mounting position 110, the in-place sensor 700 can detect the infusion tube 200 and send a signal to the processing module, so that the processing module can determine that the infusion tube 200 has been mounted on the mounting position 110.

[0098] In some embodiments, the liquid stopper 500 of the present application can specifically adopt an electric liquid stopper, and the liquid stopper 500 is connected with the processing module. When the processing module determines that the infusion tube 200 has been mounted on the mounting position 110, the processing module can control the electric liquid stopper 500 to clamp the liquid outlet end 220 of the infusion tube 200 to block the liquid outlet end 220 of the infusion tube 200, thereby making the operation of the infusion pump of the present application more convenient and intelligent.

[0099] Specifically, the infusion pump of the present application further comprises a pump door 120, which is movably connected with the housing 100. The housing 100 has a cavity which can accommodate the pumping assembly 300, the first pressure sensor 400, the second pressure sensor 600, the in-place sensor 700, the liquid stopper 500 and the processing module. The pump door 120 can close or open the cavity in the housing 100. When the cavity is open, the user can mount the infusion tube 200 on the mounting position 110 or remove the infusion tube 200 on the mounting position 110. When the infusion pump is running, the pump door 120 closes the cavity of the housing 100.

[0100] When the pump door 120 is in the closed state and the infusion tube 200 is not installed on the installation site 110, the liquid stopper 500 is in the closed state. Specifically, the liquid stopper 500 has two clamping portions oppositely arranged and capable of clamping the infusion tube 200, and the two clamping portions of the liquid stopper 500 are in the closed state. When the infusion pump of the present application is used to detect whether the infusion tube 200 is blocked, the pump door 120 can be opened first, and then the two clamping portions of the liquid stopper 500 can be opened by the processing module, and then the infusion tube 200 can be placed on the installation site 110, and the processing module controls the liquid stopper 500 to block the liquid outlet end 220 of the infusion tube 200, and then the pumping assembly 300 is started to detect whether the infusion tube 200 is blocked.

[0101] In some embodiments, a display screen can also be arranged on the housing 100 of the present application, and the display screen is electrically connected to the processing module. The processing module can display the information that the detected infusion tube 200 is in the blocked state or in the unblocked state on the display screen, so that the user can know whether the infusion tube 200 is blocked. Of course, the infusion pump of the present application can also be provided with a buzzer connected to the processing module. In this way, the processing module can represent the information that the detected infusion tube 200 is in the blocked state or in the unblocked state through the buzzer with different sounds, so that the user can also conveniently know whether the infusion tube 200 is blocked.

[0102] Reference Figures 5-8 The present application also provides an infusion tube blockage detection method of an infusion pump, comprising:

[0103] S100, acquiring position detection information of an installation site of an infusion pump;

[0104] S200, determining that an infusion tube is located at the installation site of the infusion pump according to the position detection information;

[0105] S300, blocking a liquid outlet end of the infusion tube;

[0106] S400, acquiring a third pressure of a second position of the infusion tube before the infusion pump is started;

[0107] S500, acquiring a fourth pressure of the second position of the infusion tube after the infusion pump is started;

[0108] S600, acquiring a pressure difference between the third pressure and the fourth pressure;

[0109] S700, judging the size of the pressure difference between the third pressure and the fourth pressure and a second preset pressure;

[0110] S800, determining that the liquid outlet end is in the blocked state when the pressure difference between the third pressure and the fourth pressure is greater than the second preset pressure.

[0111] S900, acquiring a first pressure of a first position of the infusion tube before the infusion pump is started;

[0112] S1000, acquire a first position of the infusion tube at a second pressure after the infusion pump is turned on;

[0113] S1100, acquire a pressure difference between the first pressure and the second pressure;

[0114] S1200, judge a size of the pressure difference between the first pressure and the second pressure and a first preset pressure;

[0115] S1300, when the pressure difference between the first pressure and the second pressure is greater than the first preset pressure, determine that the infusion tube is in an occlusion state;

[0116] S1400, when the pressure difference between the first pressure and the second pressure is less than the first preset pressure, determine that the infusion tube is in a patency state;

[0117] S1500, adjust the pressure of the second position to a fifth pressure;

[0118] S1600, open the liquid outlet end.

[0119] Finally, it should be noted that: the above implementation manners are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An infusion pump, characterized in that, include: The housing has mounting positions for placing the infusion tubing; A pumping assembly is disposed within the housing and mates with the infusion tubing; A first pressure sensor is disposed at the mounting position. The first pressure sensor can detect the first pressure at the first position of the infusion tube before the infusion pump is turned on, and the second pressure at the first position after the infusion pump is turned on. The first position is located between the inlet end of the infusion tube and the pumping assembly. A liquid stopper is disposed in the housing and is capable of opening and closing the outlet end of the infusion tube; The processing module is electrically connected to the pumping assembly and the first pressure sensor. The processing module is capable of receiving the first pressure and the second pressure, and is capable of comparing the difference between the first pressure and the second pressure with a first preset pressure. When the difference between the first pressure and the second pressure is greater than the first preset pressure, the processing module determines that the infusion pump is blocked. When the difference between the first pressure and the second pressure is less than the first preset pressure, the processing module determines that the infusion pump is in a smooth state. The processing module can control the pumping assembly to adjust the pressure at the second position of the infusion tube to the fifth pressure. Subsequently, the processing module controls the stopper to open the outlet end of the infusion tube, wherein the second position is located between the outlet end of the infusion tube and the pumping assembly. The infusion pump has an infusion mode and a pumping mode. When the infusion pump is in the infusion mode, the fifth pressure is less than the third pressure. When the infusion pump is in the pumping mode, the fifth pressure is greater than the third pressure. The third pressure is the pressure at the second position before the infusion pump is turned on, detected by the second pressure sensor.

2. The infusion pump according to claim 1, characterized in that, The second pressure sensor is disposed at the mounting position and is electrically connected to the processing module. The second pressure sensor can also detect the fourth pressure at the second position after the infusion pump is turned on. The processing module can compare the third pressure and the fourth pressure. When the pressure difference between the third pressure and the fourth pressure is greater than the second preset pressure, the processing module determines that the liquid outlet is blocked by the liquid stopper.

3. The infusion pump according to claim 2, characterized in that, The liquid-stopping component is an electric liquid-stopping clamp, and the liquid-stopping component is connected to the processing module.

4. The infusion pump according to claim 3, characterized in that, It also includes an in-situ sensor, which is connected to the processing module and is located at the mounting position. The processing module determines that the infusion tube is located at the mounting position through the in-situ sensor. When the processing module determines that the infusion tube is in the installation position, the processing module controls the liquid stopper to seal the outlet end of the infusion tube.

5. A method for detecting blockage in the infusion tubing of an infusion pump, applied to the infusion pump as described in any one of claims 1-4, characterized in that, include: Obtain the first pressure at the first position of the infusion tubing before the infusion pump is turned on; The first position of the infusion tubing is obtained, and the second pressure is obtained after the infusion pump is turned on. Obtain the pressure difference between the first pressure and the second pressure; Determine the magnitude of the pressure difference between the first pressure and the second pressure and the first preset pressure; When the pressure difference between the first pressure and the second pressure is greater than the first preset pressure, it is determined that the infusion tube is in a blocked state.

6. The method for detecting blockage in the infusion tubing of an infusion pump according to claim 5, characterized in that, Before obtaining the first pressure at the first position of the infusion tubing before the infusion pump is turned on, the infusion tubing blockage detection method of the infusion pump further includes: Seal the outlet end of the infusion tube; Determine whether the outlet end of the infusion tube is blocked.

7. The method for detecting blockage in the infusion tubing of an infusion pump according to claim 6, characterized in that, The determination of whether the outlet end of the infusion tube is blocked includes: The second position of the infusion tubing is obtained, and the third pressure is obtained before the infusion pump is turned on. The second position of the infusion tubing is obtained at the fourth pressure after the infusion pump is turned on; Obtain the pressure difference between the third pressure and the fourth pressure; Determine the magnitude of the pressure difference between the third pressure and the fourth pressure and the second preset pressure; When the pressure difference between the third pressure and the fourth pressure is greater than the second preset pressure, it is determined that the liquid outlet is in a blocked state.

8. The method for detecting blockage in the infusion tubing of an infusion pump according to claim 7, characterized in that, The infusion pump has an infusion mode and a suction mode; when the infusion pump is in the infusion mode, and the pressure difference between the first pressure and the second pressure is less than the first preset pressure, the infusion tube blockage detection method of the infusion pump further includes: Adjust the pressure at the second position to the fifth pressure; Open the liquid outlet end; When the infusion pump is in the infusion mode, the fifth pressure is less than the third pressure; When the infusion pump is in the pumping mode, the fifth pressure is greater than the third pressure.

9. The method for detecting blockage in the infusion tubing of an infusion pump according to any one of claims 6-8, characterized in that, Before obtaining the first pressure at the first position of the infusion tubing before the infusion pump is turned on, the infusion tubing blockage detection method of the infusion pump further includes: Obtain the position detection information of the installation position of the infusion pump; The location of the infusion tube in the installation position of the infusion pump is determined based on the position detection information. Perform the step of obtaining the first pressure.

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