Electric sucker

Abstract

To provide an electric sucker that can mitigate pulsation of drainage.SOLUTION: An electric sucker 1 comprises: a drainage bag 2 having a housing part 20 for housing drainage from a living body; a positive displacement pump (diaphragm pump 3) for intermittently applying a negative pressure to the housing part 20 of the drainage bag 2; a trap bottle 4 connected between the drainage bag 2 and the pump 3; and a buffer bottle 5 connected in series between the trap bottle 4 and the pump 3. The trap bottle 4 restrains the drainage from flowing out toward the pump 3 from the drainage bag 2. The buffer bottle 5 mitigates pulsation of the drainage.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electric suction machine. [Background technology]

[0002] Medical electric suction machines that suck drainage (body fluids) and gas from a living body through a tube include a drainage bag that stores drainage from the living body, a pump that applies negative pressure to the drainage bag, and a trap bottle that is provided between the drainage bag and the pump. For example, Patent Document 1 discloses an electric suction machine (described in the same document as a medical electric suction device) that includes a drainage bag (described in the same document as a collection bag), a trap bottle for an overflow reservoir (described in the same document as a cushion bottle), and a suction pump. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-20658 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric suction machine described in Patent Document 1, for example, when the pump is a volumetric pump that applies negative pressure intermittently, the applied negative pressure can cause the aspirated drainage liquid to pulsate, and there is room for improvement in alleviating this pulsation.

[0005] The present invention has been made in consideration of the above problems, and provides an electric aspirator capable of reducing the pulsation of drained liquid. [Means for solving the problem]

[0006] The electric suction machine of the present invention comprises a drainage bag having a storage section for storing drainage liquid from a living organism, a positive displacement pump that intermittently applies negative pressure to the storage section of the drainage bag, a trap bottle connected between the drainage bag and the pump, and a buffer bottle connected in series between the trap bottle and the pump, wherein the trap bottle prevents the drainage liquid from flowing out from the drainage bag toward the pump, and the buffer bottle reduces pulsation of the drainage liquid. Effect of the Invention

[0007] According to the present invention, the pulsation of the drainage liquid can be reduced. [Brief description of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram showing an entirety of an electric suction machine according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a housing of the electric suction machine. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] 4 is a cross-sectional view showing a portion of the electric suction machine corresponding to the VV cross section of FIG. 3. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 2 is a schematic diagram showing a suction circuit. [Figure 12] FIG. 13 is a schematic diagram showing a suction circuit according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects of the components described below may be changed or improved without departing from the spirit of the present invention, and the present invention includes equivalents thereof. In addition, in all the drawings, similar components are given the same symbols and descriptions thereof are omitted as appropriate. In the following description, the side connected to the living body is referred to as the upstream side, and the side connected to the pump 3 is referred to as the downstream side.

[0010] <Summary> First, an overview of the present invention will be described by taking the present embodiment as an example, mainly with reference to Fig. 1 to Fig. 5. Fig. 1 is an explanatory diagram showing the whole of an electric suction machine 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing a housing 30 of the electric suction machine 1, and Fig. 3 is a right side view of the housing 30. Fig. 4 is a front view showing the electric suction machine 1, and Fig. 5 is a cross-sectional view showing a part of the electric suction machine 1 corresponding to the VV cross section of Fig. 3. In FIG. 1, the direction of suction by the electric suction device 1 is indicated by an arrow.

[0011] The electric suction machine 1 of this embodiment includes a drainage bag 2 shown in Figures 1 and 4 having a storage section 20 for storing drainage from a living body, a positive displacement pump (diaphragm type pump 3) shown in Figures 1 and 5 for applying intermittent negative pressure to the storage section 20 of the drainage bag 2, a trap bottle 4 shown in Figures 1 and 4 connected between the drainage bag 2 and the pump 3, and a buffer bottle 5 shown in Figures 1 and 5 connected in series between the trap bottle 4 and the pump 3. The trap bottle 4 prevents the waste liquid from flowing out from the waste liquid bag 2 toward the pump 3, and the buffer bottle 5 reduces the pulsation of the waste liquid.

[0012] The "positive displacement pump" that applies negative pressure intermittently includes the diaphragm pump 3 according to this embodiment, as well as plunger pumps, piston pumps, and the like. The function of the trap bottle 4, which is to “prevent the outflow of waste liquid from the drainage bag 2 toward the pump 3,” includes the ability of the trap bottle 4 to stop the outflow of waste liquid from the drainage bag 2. The above-mentioned "connected in series" does not mean that the components are arranged and connected on a branched path in a path going from upstream to downstream, but that the components are arranged and connected on the upstream side and downstream side in at least one path. In addition, the above-mentioned "mitigating the pulsation of the drainage liquid" is achieved by providing a buffer bottle 5 in the drainage flow path and adding an equivalent volume, and means that the average flow rate fluctuation range of the drainage liquid is reduced by a predetermined percentage or more.

[0013] According to the above-described configuration, the buffer bottle 5 can reduce the pulsation of the drainage fluid caused by the intermittent negative pressure from the positive displacement pump, thereby enabling the drainage fluid to be suctioned stably, which is particularly suitable for suctioning drainage fluid from the thoracic cavity. For example, by reducing the pulsation of the drainage liquid, an accurate flow rate (leak flow rate) can be measured when checking for leaks using a flow meter (not shown) including a flow sensor (not shown).

[0014] [Overall configuration] The electric suction machine 1 according to this embodiment will be described mainly with reference to Fig. 6 to Fig. 11 in addition to Fig. 1 to Fig. 5. Fig. 6 is a front view of the housing 30, Fig. 7 is a rear view of the housing 30, Fig. 8 is a left side view of the housing 30, Fig. 9 is a plan view of the housing 30, and Fig. 10 is a bottom view of the housing 30. Fig. 11 is a schematic diagram showing the suction circuit B. The electric suction machine 1 has a connection tube 2a connected to a living body, and sucks up gas and waste liquid (body fluids) from the living body and stores them in the storage section 20 of the drainage bag 2.As described above, the electric suction machine 1 is equipped with a diaphragm-type pump 3 for sucking up gas and waste liquid. The electric suction device 1 includes a housing 30 including a main body 30a and a rear cover 30b covering the rear surface of the main body 30a, and a display unit 31 provided on the top surface of the housing 30, as shown in FIG.

[0015] The main body 30a comprises a front wall 30d, a base 30c extending forward from the lower end of the front wall 30d, a pair of ribs 30e integrally connected to the upper surface of the base 30c and the front wall 30d, and a back guide 32 arranged in front of the ribs 30e.

[0016] The drainage bag 2, which will be described later, is placed on the base 30c. A pair of upper and lower ring-shaped bottle guides 33, through which a trap bottle 4 (described later) is passed and supported, are provided protruding from the front surface of the front wall 30d. The rib 30e and the back guide 32 support the lower part of the drainage bag 2.

[0017] The lower end of the rib 30e is connected to the upper surface of the base 30c, and the rear end of the rib 30e is connected to the lower part of the front surface of the front wall 30d. The upper edge of the rib 30e is formed so as to slope downward as it extends forward from the front wall 30d. The back guide 32 has an inclined edge 32b at its upper edge which slopes downward as it approaches the rib 30e.

[0018] In this manner, the upper edge of the rib 30e and the inclined edge 32b of the back guide 32 are formed. With this configuration, when the lower part of the drainage bag 2 is pressed against the upper edge of the rib 30e and the rib 30e of the back guide 32, the drainage bag 2 is guided so as to be inserted between the rib 30e and the back guide 32 and supported.

[0019] Further, recesses 32a are formed on the inside of the outer edges of both side surfaces of the back guide 32. In a side view, the recesses 32a are formed in a shape in which a vertically elongated rectangular lower portion and a vertically elongated trapezoidal upper portion are continuous, and the distance between the recesses 32a and the inclined edges 32b is longer than the distance between the recesses 32a and the upper edges and front edges other than the inclined edges 32b. Because the back guide 32 is formed in this manner, even if a load is applied to the inclined edge 32b when the drainage bag 2 is pressed against the back guide 32, the drainage bag 2 can be stably guided to the supporting position.

[0020] As shown in FIG. 7, the rear cover 30b is formed with an exhaust port 30f for releasing heat from the pump 3 to the outside of the housing 30, and an exhaust port 30g for releasing heat from the control circuit 8 (described later) to the outside of the housing 30. The exhaust port 30f is provided at a position facing the pump 3, and the exhaust port 30g is provided at a position facing the control circuit 8.

[0021] The display unit 31 according to this embodiment is provided on the upper surface of the housing 30, and is configured, for example, with a touch panel type (capacitive type, resistive film type, etc.) liquid crystal display. The display unit 31 is electrically connected to the control circuit 8 described later, and in this embodiment, is capable of displaying the suction mode, suction pressure, leak occurrence status, notification sound settings, remaining battery level, error history, etc.

[0022] [Drainage bag] The drainage bag 2 according to this embodiment is for storing drainage from a living body. The drainage bag 2 comprises a storage section 20 for storing the drainage liquid, and a water sealing section 21 that is connected to the upper part of the storage section 20 and contains a liquid as shown in Figure 4, and in which the generation of bubbles, which are gas aspirated from the living body, can be visually observed from the outside. The housing section 20 is composed of a first housing section 20a and a second housing section 20b that communicates with an upper part of the first housing section 20a. The water sealing section 21 communicates with an upper part of the second housing section 20b. 4 shows air bubbles that are generated in the liquid contained in the water seal portion 21 when a negative pressure of a predetermined level or more is applied by the pump 3. In a state in which no negative pressure is applied before the operation of the pump 3, no air bubbles are generated in the liquid in the water seal portion 21.

[0023] The drainage bag 2 is supported in the front-to-back and left-to-right directions by ribs 30e and back guides 32 at portions (two portions in total) between the first storage section 20a and the second storage section 20b, and between the second storage section 20b and the water sealing section 21, which are formed thinner in the front-to-back direction than other portions. The drainage bag 2 is made of, for example, a transparent (transparent to visible light) resin material. The transparent resin material is not particularly limited, but examples thereof include rigid polyvinyl chloride resin, polyester resin such as polyethylene terephthalate, styrene resin such as acrylonitrile-styrene copolymer resin, polyolefin resin such as polypropylene (PP) or PE, etc.

[0024] [Suction circuit] In this embodiment, as shown in FIG. 11, a disposable suction circuit B is formed by a trap bottle 4, a connection tube 4a, a filter 4d provided at the tip side of the connection tube 4a, a connection tube 4b, a filter 4e provided at the tip of the connection tube 4b, and a connection tube 4c.

[0025] In other words, the electric suction machine 1 includes a connection tube 4a, which is a first connection tube connected to the trap bottle 4 and the buffer bottle 5, and a second connection tube (connection tube 4b) connected to the trap bottle 4, as shown in Fig. 4 and Fig. 5. As shown in Fig. 11, a filter 4d, which is a first filter, is provided in the connection tube 4a, and a second filter (filter 4e) is provided in the connection tube 4b. For example, the filters 4d and 4e are formed of a porous body in which PTFE fibers are intertwined.

[0026] According to the above configuration, the filter 4d can prevent the waste liquid from flowing from the trap bottle 4 into the buffer bottle 5 described below. In other words, the filter 4d can prevent the waste liquid from flowing into the housing 30 toward the pump.

[0027] The connecting tube 4a is connected to the cap constituting the trap bottle 4 shown in FIG. 4 so as to communicate with the inside of the trap bottle 4, and is disposed inside the housing 30 from the front side of the housing 30, and is connected to the pump 3 through the buffer bottle 5 shown in FIG. 5 and described later. More specifically, the connection tube 4a is composed of two tubes, one located outside the housing 30 and the other located inside the housing 30, which are connected to a connection port 30h provided in the housing 30. The suction circuit B is composed of the outer tube of the connection tube 4a.

[0028] The connection tube 4b is connected to the cap constituting the trap bottle 4 shown in FIG. 4 so as to communicate with the inside of the trap bottle 4, and is connected to a control circuit 8 via a pressure sensor 7. As shown in FIG. 1, the connection tube 4b is provided with an electromagnetic valve 6. More specifically, the connection tube 4b is composed of two tubes, one located outside the housing 30 and the other located inside the housing 30, which are connected to a connection port 30i provided in the housing 30. The suction circuit B is composed of the outer tube of the connection tube 4b.

[0029] Since the connection tubes 4a, 4b are configured in this manner, it becomes possible to replace the suction circuit B without opening the rear cover 30b of the housing 30. However, each of the connecting tubes 4a, 4b is not limited to being composed of two tubes provided on the inside and outside of the housing 30, but may be composed of a single tube that connects the inside and outside of the housing 30.

[0030] The connection tube 4 c is connected to the drainage bag 2 and the trap bottle 4 . More specifically, the connection tube 4c is connected to the upper end of the area of ​​the drainage bag 2 that includes the water seal portion 21, and is attached to the cap that constitutes the trap bottle 4 so as to communicate with the inside of the trap bottle 4. In addition, the connection tube 4c and the connection tube 4b may be separately connected to the cap that constitutes the trap bottle 4 as in this embodiment, or the connection tube 4c may be branched off to the connection tube 4b, and the connection tube 4b may not be connected to the cap.

[0031] Incidentally, a flow meter (not shown) including a flow sensor (not shown) for measuring the flow rate of exhaust gas may be attached to the connection tube 4a to measure the leakage flow rate. Further, at the top of the trap bottle 4, a positive pressure release valve 4f is provided for releasing the positive pressure inside the trap bottle 4 that is equal to or greater than a certain value to the outside.

[0032] The mesh of filter 4d is coarser than that of filter 4e, ie, the aperture ratio of filter 4d (the ratio of the portion through which gas passes in a certain area) is higher than that of filter 4e. The area (filter diameter) of the flow passage cross section (cross section perpendicular to the flow passage direction) of filter 4d is larger than the area (filter diameter) of the flow passage cross section of filter 4e.

[0033] According to the above configuration, the mesh of the first filter (filter 4d) is formed coarser than that of the second filter (filter 4e), which makes it easier to ensure the suction flow rate of the drainage fluid from the living body to the drainage bag 2 by the negative pressure generated by the pump 3.

[0034] [Buffer bottle] The electric suction machine 1 includes not only the trap bottle 4 but also the buffer bottle 5. The capacity of the buffer bottle 5 is formed to be larger than the capacity of the trap bottle 4. By adding the volume (capacity) of the buffer bottle 5, the area to which the negative pressure from the pump 3 is applied becomes larger compared to the case where the buffer bottle 5 is not provided and the connection tube 4a is directly connected to the pump 3. By increasing the area to which the negative pressure of the pump 3 is applied in this manner, it is possible to suppress the pulsation of the drainage liquid caused by the intermittent changes in the negative pressure of the pump 3 as described above. The buffer bottle 5 is connected to the trap bottle 4 via a connecting tube 4a, and is connected to the pump 3 via a connecting tube 4g.

[0035] Incidentally, a flow meter (not shown) capable of measuring the flow rate of fluid (wastewater and gas) leaking from the drainage bag 2 or the suction circuit B and detecting leakage may be used. If the fluid to be measured is pulsating, the value measured by the flow meter may be lower than the actual flow rate. In order to measure the flow rate accurately, it is necessary to rectify the flow of the fluid to be measured. The buffer bottle 5 according to this embodiment has a function of suppressing pulsation of the fluid to be measured and rectifying the flow of the fluid. With the above configuration, the buffer bottle 5 can suppress pulsation of the fluid to be measured caused by intermittent negative pressure applied from the pump 3. This allows accurate measurement of the leak flow rate.

[0036] [Solenoid valves, pressure sensors] 1, a solenoid valve 6 and a pressure sensor 7 are connected to the connection tube 4b. The control circuit 8 controls the operation of the pump 3 to adjust the suction pressure to a set pressure in response to a pressure signal sent from the pressure sensor 7 to the control circuit 8. As shown in FIG. 1, the control circuit 8 is configured to be able to receive power from a battery 9 and an AC adapter 10, and is configured to be able to supply power from the control circuit 8 to the pump 3.

[0037] [Variations] Although the suction circuit B according to the above embodiment is a disposable type, the present invention is not limited to such a configuration. Next, a suction circuit B1 according to a modified example that is intended to be repeatedly used after cleaning will be described with reference mainly to FIG. FIG. 12 is a schematic diagram showing a suction circuit B1 according to a modified example.

[0038] As shown in FIG. 12, the suction circuit B1 of this example is composed of a trap bottle 44, a swellable filter 44d provided inside the trap bottle 44, a connecting tube 44a, a connecting tube 44b, and a connecting tube 4c that is the same as that in the above embodiment.

[0039] The term "swellable filter" refers to a filter made of a filter medium that can swell by absorbing wastewater. For example, the filter 44d is made of polyethylene, a synthetic resin material, and sodium carboxymethylcellulose, a thickening stabilizer. Moreover, the filter 44d is disposed so as to cover the port connected to the connection tube 44a, and prevents the waste liquid from flowing directly from the trap bottle 44 into the connection tube 44a without passing through the filter 44d.

[0040] The connection tube 44a is similar to the connection tube 4a according to the above embodiment in that it is connected to the trap bottle 44 and the buffer bottle 5. However, the connection tube 44a is different from the connection tube 4a in that the filter 4d shown in FIG. The connection tube 44b is similar to the connection tube 4b according to the above embodiment in that it is connected to the trap bottle 44 and the control circuit 8. On the other hand, the connection tube 44b differs from the connection tube 4b in that the filter 4e shown in FIG.

[0041] Moreover, the filter 44d is not provided immediately below or around the port (inflow port) to which the connection tube 4c is connected, and the inflow port opens toward the inside of the trap bottle 44. Therefore, the waste liquid discharged from the storage section 20 of the waste liquid bag 2 through the connection tube 4c flows directly into the trap bottle 44 without passing through the filter 44d. This prevents the waste liquid flowing into the trap bottle 44 from coming into contact with the filter 44d and causing the filter 44d to swell unexpectedly. When the waste liquid accumulates in the trap bottle 44 beyond a predetermined amount, the waste liquid comes into contact with the lower end of the filter 44d and the filter 44d starts to swell. As a result, the mesh of the filter 44d is blocked at the swollen area, restricting the passage of gas and liquid.

[0042] Here, the filter 44d may be an airtight cylindrical body (case) with an open upper end and lower end, in which a swellable porous body is housed. The upper end of the porous body of the filter 44d covers the port (outlet port) of the connection tube 44a, and the lower end is exposed toward the inside of the trap bottle 44 and can come into contact with the waste liquid. The periphery of the porous body is covered by a cylindrical body. In this case, when the waste liquid accumulates in the trap bottle 44 to a height exceeding the lower end of the filter 44d and comes into contact with the lower end of the filter 44d, the swellable porous body swells and adheres airtightly to the cylindrical body, and the mesh of the porous body is blocked, so that the air in the trap bottle 44 is no longer discharged from the connection tube 44a through the filter 44d. As a result, when the waste liquid accumulated in the trap bottle 44 reaches the height of the lower end of the filter 44d, the inflow of new waste liquid into the trap bottle 44 is restricted, and the trap bottle 44 is prevented from becoming full of waste liquid. In addition, even if droplets of the drainage liquid splash toward the connecting tube 44a, such droplets are captured by the filter 44d, and thus the droplets are prevented from being carried by the air flow and discharged from the connecting tube 44a toward the buffer bottle 5.

[0043] Alternatively, instead of the above embodiment, the cylindrical body may be omitted and the entire swellable porous body may be exposed to the inside of the trap bottle 44. In this case, the air permeability of the entire filter 44d is not lost when the liquid level of the waste liquid stored in the trap bottle 44 reaches the lower end of the filter 44d and the lower end swells, and air can flow out to the connection tube 44a through the circumferential surface of the filter 44d. When the waste liquid gradually rises beyond the lower end height of the filter 44d, the swelling of the porous body of the filter 44d progresses from the lower end upward, and finally the entire filter 44d swells and the port of the connection tube 44a is blocked. As a result, the waste liquid can be stored until the trap bottle 44 exceeds the lower end height of the filter 44d and is almost full, and when it is almost full, the outflow port is blocked by the filter 44d, and the inflow of new waste liquid into the trap bottle 44 is restricted thereafter.

[0044] According to the above configuration, a swellable filter 44d is provided in the trap bottle 44, thereby preventing waste liquid from entering the housing 30 of the electric suction machine 1 in which the pump 3 is provided, thereby protecting the electric suction machine 1.

[0045] It is not necessary that the various components of the electric suction machine 1 of the present invention exist independently of one another. It is acceptable that multiple components are formed as one member, that one component is formed from multiple members, that one component is a part of another component, that part of one component overlaps with part of another component, and so on.

[0046] The present embodiment encompasses the following technical ideas. (1) A drainage bag having a storage section for storing drainage from a living body; A positive displacement pump that applies negative pressure intermittently to the storage portion of the drainage bag; a trap bottle connected between the drainage bag and the pump; a buffer bottle connected in series between the trap bottle and the pump; The trap bottle prevents the drainage liquid from flowing out from the drainage bag toward the pump, The electric suction machine is characterized in that the buffer bottle reduces pulsation of the drainage liquid. (2) a connecting tube connected to the trap bottle and the buffer bottle; The electric suction machine according to (1), wherein the connecting tube is provided with a filter. (3) Further comprising a second connecting tube connected to the trap bottle; the filter is a first filter, the connecting tube is a first connecting tube, A second filter is provided in the second connecting tube, The electric aspirator according to (2), wherein the mesh of the first filter is coarser than the mesh of the second filter. (4) The electric aspirator according to any one of (1) to (3), wherein a filter having swelling properties is provided inside the trap bottle. [Explanation of symbols]

[0047] 1 Electric suction machine 2 Drainage bag 2a Connecting tube 3. Pump 4. Trap Bottle 4a Connection tube (first connection tube) 4b Connection tube (second connection tube) 4c Connecting tube 4d filter (first filter) 4e filter (second filter) 4f Positive Pressure Release Valve 4g connecting tube 5 Buffer Bottle 6. Solenoid valve 7 Pressure Sensor 8 Control Circuit 9 batteries 10 AC adapter 20 Storage unit 20a First storage section 20b Second storage section 21 Water seal section 30 Case 30a Body 30b Rear lid 30c base 30d front wall 30e Rib 30f, 30g exhaust port 30h, 30i connection port 31 Display section 32 Back Guide 32a Recess 32b Sloping edge 33 Bottle Guide 44 Trap Bottle 44a, 44b connecting tube 44d Filter B, B1 suction circuit

Claims

1. A drainage bag having a storage section for storing drainage from a living body; A positive displacement pump that applies negative pressure intermittently to the storage portion of the drainage bag; a trap bottle connected between the drainage bag and the pump; a buffer bottle connected in series between the trap bottle and the pump; The trap bottle prevents the drainage liquid from flowing out from the drainage bag toward the pump, The electric suction machine is characterized in that the buffer bottle reduces pulsation of the drainage liquid.

2. a connecting tube connected to the trap bottle and the buffer bottle; 2. The electric suction machine according to claim 1, wherein the connecting tube is provided with a filter.

3. Further comprising a second connecting tube connected to the trap bottle; the filter is a first filter; the connecting tube is a first connecting tube, A second filter is provided in the second connecting tube, 3. The electric suction machine according to claim 2, wherein the mesh of the first filter is coarser than the mesh of the second filter.

4. 4. The electric suction machine according to claim 3, wherein a filter having swelling properties is provided inside the trap bottle.

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