Filtering device

Abstract

Provided is a filter device for an extracorporeal circulation circuit in which bubbles are less likely to remain after priming. The filter device 1 of the present invention includes a first container 20A having a first cylindrical portion 23, a first end face portion 24 covering one end portion of the first cylindrical portion, and a first fluid inlet and outlet 25 extending from the first end face portion in the axial direction of the first cylindrical portion; a second container 20B having a second cylindrical portion 26 with the other end portion connected to the one end portion of the first container, a second end face portion 27 covering the other end portion of the second cylindrical portion 26, and a second fluid inlet and outlet 28 extending from the second end face portion 27 in the axial direction of the second cylindrical portion, a protrusion portion 60 provided with a slit 61 in a circumferential and discontinuous manner being formed on the outer periphery of the inner surface 28a of the second end face portion 27; an O-ring 62 installed on the outer periphery of the protrusion portion 60 and held between the end face of the first cylindrical portion 23 and the inner surface 28a of the second end face portion 27; and a filter material 10 housed in the internal space formed by the mutual connection of the first container 20A and the second container 20B.

Description

Technical Field

[0001] This invention relates to a filtration device for extracorporeal circulation circuits. Background Technology

[0002] Previously, in procedures such as cardiac surgery, extracorporeal circulation circuits equipped with artificial lungs were used to perform extracorporeal circulation for patients during surgery. When using an extracorporeal circulation circuit, in order to prevent foreign objects or air from entering the blood during operation, a pre-flushing solution such as saline is circulated within the extracorporeal circulation circuit beforehand (see Patent Document 1).

[0003] The extracorporeal circulation circuit is equipped with a cleaning filter device for capturing foreign objects during pre-flushing. The cleaning filter device includes filter media and a container for housing the filter media. The container is divided into two parts for loading the filter media, and these parts are connected after the filter media is loaded. Furthermore, an O-ring is provided at the connection point to improve airtightness.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2008-246141 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, sometimes even after pre-rinsing, air bubbles remain near the O-rings in the filter.

[0009] The purpose of this invention is to provide a filtration device for an external circulation loop that makes it difficult for air bubbles to remain after pre-flushing.

[0010] Methods for solving problems

[0011] To address the aforementioned issues, the present invention provides a filtration device used during pre-flush of an extracorporeal circulation loop, comprising: a first container having a first cylindrical portion, a first end portion covering one end of the first cylindrical portion, and a first fluid inlet / outlet extending axially from the first end portion toward the first cylindrical portion; a second container having a second cylindrical portion with one end connected to the other end of the first container, a second end portion covering the other end of the second cylindrical portion, and a second fluid inlet / outlet extending axially from the second end portion toward the second cylindrical portion, wherein a protrusion with a circumferentially discontinuous slit is formed on the outer peripheral side of the inner surface of the second end portion; an O-ring disposed on the outer periphery of the protrusion and held between the end face of the first cylindrical portion and the inner surface of the second end portion; and a filter material housed in an internal space formed by the connection of the first container and the second container.

[0012] In addition, the aforementioned slits are preferably formed evenly in the circumferential direction.

[0013] Furthermore, the aforementioned first cylinder is preferably disposed on the fluid inlet side, and the aforementioned second cylinder is preferably disposed on the fluid outlet side.

[0014] In addition, the aforementioned blood circulation circuit can also be equipped with an artificial lung.

[0015] The effects of the invention

[0016] According to the present invention, a filtration device for blood circulation loops that are difficult to retain air bubbles after pre-flushing can be provided. Attached Figure Description

[0017] Figure 1 This is a diagram illustrating the structure of the blood circulation loop 100.

[0018] Figure 2 It is a cross-sectional view including the cleaning and filtering device 1 and a portion of the pipe 101 connected to the cleaning and filtering device 1.

[0019] Figure 3 This is a diagram illustrating the manufacturing method of filter material 10.

[0020] Figure 4 This is an exploded perspective view of the cleaning and filtration device 1.

[0021] Figure 5 yes Figure 2 A magnified view of a portion of the image.

[0022] Figure 6 This is a perspective view of the second container 20B as seen from the inner surface side.

[0023] Figure 7This is a diagram showing the state of the disassembly operation component 43 from the first loading / unloading section 40A.

[0024] Figure 8 This diagram illustrates the steps of installing the second loading / unloading part 50A of the second loading / unloading component 80 onto the first loading / unloading part 40A of the cleaning and filtering device 1.

[0025] Figure 9 This is a diagram illustrating the removal steps of cleaning filter device 1.

[0026] Figure 10 This diagram illustrates the disassembly steps of the second loading / unloading section 50A and the first loading / unloading section 40A. Detailed Implementation

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0028] In this embodiment, the cleaning and filtration device 1 for the flowing pre-rinsing liquid will be described as an example of a fluid processing device. Furthermore, the blood circulation circuit 100 will be described as an example of an extracorporeal circulation circuit.

[0029] However, the fluid flowing in the fluid handling device is not limited to priming fluid; it can also be blood, other medications, etc. The fluid handling device can also be an artificial lung, blood filter, heat exchanger, blood concentrator, blood storage tank, blood pump, etc. The extracorporeal circulation circuit can also be a myocardial protection circuit, etc.

[0030] (Blood circulation loop 100)

[0031] Figure 1 This diagram illustrates the configuration of the blood circulation circuit 100. The blood circulation circuit 100 is used in an artificial heart-lung system and therefore includes a blood storage tank 3, a blood pump 4, an artificial lung 5, a blood filtration device 6, and a cleaning and filtration device 1 for circuit cleaning. Each device is connected by a flexible polyvinyl chloride (PVC) tube 101.

[0032] It should be noted that, in the following description, when the blood circulation circuit 100 is used as an artificial heart-lung system to retrieve blood from and replenish blood from a patient, it is referred to as "normal use". Furthermore, the act of circulating a pre-flushing solution (e.g., saline) through the blood circulation circuit 100 to remove foreign objects and air bubbles present within the blood circulation circuit 100 before "normal use" is referred to as "pre-flushing".

[0033] (Blood Tank 3)

[0034] Blood reservoir 3 stores blood taken from the patient during normal use and pre-fill fluid during pre-filling.

[0035] (Blood Pump 4)

[0036] Blood pump 4 is located downstream of blood storage tank 3 to circulate blood or pre-flushing fluid. Known centrifugal pumps or roller pumps are used as blood pump 4. In this embodiment, a centrifugal pump is used to drive a rotating body located inside, applying pressure to the blood or pre-flushing fluid, causing the blood or pre-flushing fluid to circulate within the blood circulation loop 100.

[0037] (Artificial Lung 5)

[0038] An artificial lung 5 is positioned downstream of the blood pump 4. During normal use, the artificial lung 5 adjusts the temperature of the blood pumped from the blood reservoir 3 to the patient and performs gas exchange (oxygenation, carbon dioxide removal, etc.). Oxygen supply is achieved, for example, using an oxygen cylinder, to supply additional oxygen to the blood.

[0039] (Blood filtration device 6)

[0040] The blood filtration device 6 filters blood and removes air bubbles from the blood during normal use.

[0041] (Cleaning filter device 1)

[0042] The cleaning filter 1 is used during the pre-flushing of the blood circulation loop 100 and is removed after the pre-flushing. Figure 2 It is a cross-sectional view including a cleaning filter device 1 and a portion of a pipe 101 connected to the cleaning filter device 1. The cleaning filter device 1 includes filter material 10 and a container 20 for storing the filter material 10.

[0043] (Filter material 10)

[0044] Figure 3 This is a diagram illustrating the manufacturing method of filter material 10. First, as... Figure 3 As shown in (a), a supported spacer 10A supported by the core component 12 is formed by overlapping a grid-like spacer 13 onto an elongated, plate-like core component 12. The grid-like spacer 13 is made of a polyolefin-based polymer material. The spacer 13 is preferably made of a grid, preferably composed of fibers formed from polypropylene (PP) or polyethylene terephthalate (PET). The grid has an opening area (pore size) of 1.5 mm to 2.5 mm, and the fiber diameter is 0.4 mm to 0.6 mm.

[0045] In this embodiment, the core member 12 supports the spacer member 13 by inserting it into the interior of the bag-shaped (cylindrical) spacer member 13. However, it is not limited to this; the front and back of the core member 12 may also be covered by a planar spacer member 13. Furthermore, the spacer member 13 may be disposed only overlapping one side of the core member 12.

[0046] Next, as Figure 3As shown in (b), a porous hollow filament 14 is wound around the outer periphery of the supported spacer 10A.

[0047] At this time, the hollow wire 14 is wound in a manner extending in the width direction S of the supported spacer member 10A. That is, the hollow wire 14 is wound from one end in the width direction S to the other end on one side of the supported spacer member 10A, and then changes direction at the other end in the width direction S. On the other side of the supported spacer member 10A, it is wound from the other end in the width direction to one end, and then changes direction at the other end in the width direction. The above operation is repeated to wind the hollow wire 14 around the outer periphery of the supported spacer member 10A. It should be noted that, at this time, it is preferable that adjacent hollow wires 14 are wound without overlapping each other and without gaps.

[0048] Then, the hollow wire 14 is wound from one side of the length direction L of the supported spacer member 10A to the other side, and the hollow wire 14 is wound over approximately the entire area of ​​the supported spacer member 10A.

[0049] Next, as Figure 3 As shown in (c), the core member 12 is pulled out from one side of the supported spacer member 10A with hollow wire 14 wound around it, forming a hollow wire winding body 10B with hollow wire 14 wound around the outer periphery of the spacer member 13.

[0050] Then, as Figure 3 As shown in (d), the hollow filament winding body 10B is wound from one side of the length direction L to the other side to form a cylindrical filter material 10 wound into a roller shape.

[0051] If the filter material 10 manufactured in this way is wound around the spacer member 13 with hollow filaments 14 without overlap or gap, the hollow filaments 14 are uniformly arranged on the surface of the spacer member 13. Thus, even when wound into a roller shape to become cylindrical, the hollow filaments 14 can be uniformly arranged without omission, so that uneven filtration will not occur.

[0052] Since the hollow filaments 14 are wound around the spacer 13, the arrangement of the hollow filaments 14 can be maintained even when the core component 12 is removed and wound into a roller shape to become cylindrical, so that uneven filtration will not occur.

[0053] Furthermore, since the hollow fibers 14 are wound around the spacer member 13, it is possible to prevent the hollow fibers 14 from sticking together. Also, since the spacer member 13 is mesh-like, it is possible to suppress pressure loss during filtration. Moreover, it is possible to reduce the amount of hollow fibers 14 corresponding to the spacer member 13.

[0054] Figure 4 This is an exploded perspective view of the cleaning and filtration device 1. Figure 5 yes Figure 2A partially enlarged view. Container 20 includes a first container 20A disposed on the upstream side (inlet side) of the fluid and a second container 20B disposed on the downstream side (outlet side) of the fluid.

[0055] (1st container 20A)

[0056] The first container 20A includes a cylindrical first cylindrical portion 23, a circular plate-shaped first end portion 24 covering one axial end of the first cylindrical portion 23, i.e., the inlet side, and a fluid inlet (first fluid inlet / outlet) 25 extending axially from the center of the first end portion 24 upstream.

[0057] (First connecting section 30A)

[0058] A first connecting portion 30A is provided on the outer surface of the other end of the first cylindrical portion 23, i.e., the downstream side. The first connecting portion 30A is the part that connects to the second connecting portion 30B of the second container 20B, which will be described later.

[0059] The first connecting portion 30A, starting from the downstream side, includes eight equally spaced engaging protrusions 32 in the circumferential direction, and annular protrusions 33 extending continuously in the circumferential direction, located upstream of the engaging protrusions 32. It should be noted that the number of engaging protrusions 32 is not limited to eight; it can be eight or more, or eight or fewer. Furthermore, the annular protrusions 33 can be discontinuous in the circumferential direction.

[0060] The amount of protrusion of the engaging protrusion 32 from the outer surface of the first cylindrical portion 23 increases as it moves from the downstream side to the upstream side. That is, a slope 34 that rises from the downstream side to the upstream side is formed on the outer surface of the engaging protrusion 32.

[0061] (Container 20B)

[0062] The second container 20B includes a cylindrical second cylindrical portion 26, a circular plate-shaped second end portion 27 covering the other axial end of the second cylindrical portion 26, i.e. the outlet side, and a fluid outlet (second fluid inlet / outlet) 28 extending axially from the center of the second end portion 27 to the downstream side.

[0063] (Second connecting section 30B)

[0064] The second connecting part 30B is a part provided at one end of the second cylindrical part 26 and connected to the first container 20A.

[0065] The second connecting portion 30B has eight equally spaced engagement holes 37 corresponding to the engagement protrusions 32 of the first cylindrical portion 23 in the circumferential direction, and a front end portion 38 located upstream of the engagement holes 37. It should be noted that, like the engagement protrusions 32, the number of engagement holes 37 is not limited to eight.

[0066] (Protrusion)

[0067] Figure 6 This is a perspective view of the second container 20B as seen from its inner surface. A protrusion 60, with slits 61 formed along the circumference and in a discontinuous manner, is provided on the outer periphery of the inner surface side of the second end portion 27 of the second container 20B. The slits 61 are provided at six equal locations in the circumferential direction. However, the number is not limited to six locations; there may be six or more, or fewer than six locations.

[0068] (O-ring)

[0069] A structure such as a bracket is provided on the outer periphery of the protrusion 60. Figure 2 and Figure 5 The O-ring 62 shown Figure 6 (Not shown in the image).

[0070] As described above, the filter material 10, with the hollow filaments 14 wound around the spacer member 13, is first housed in the first container 20A. Then, the downstream end of the filter material 10 is bonded to the first container 20A using urethane adhesive and fixed thereto. For example, centrifugal potting can be used as a fixing method. Then, the second container 20B is covered by the opening on the downstream side of the first container 20A, connecting the first connecting portion 30A to the second connecting portion 30B.

[0071] At this time, the connection between the first connecting part 30A and the second connecting part 30B is performed as follows.

[0072] When the second cylindrical portion 26 is inserted into the outer periphery of the first cylindrical portion 23, the diameter of the front end portion 38 of the second cylindrical portion 26 expands along the inclined surface 34 of the engaging protrusion 32. Then, when the front end portion 38 of the second cylindrical portion 26 extends beyond the inclined surface 34 of the engaging protrusion 32, the front end portion 38 of the second cylindrical portion 26 is engaged in the recess between the annular protrusion 33 and the engaging protrusion 32. Thus, the first connecting portion 30A and the second connecting portion 30B are connected, and the filter material 10 is housed within the internal space of the container 20.

[0073] At this time, as Figure 2 and Figure 5 As shown, when the first container 20A and the second container 20B are connected, the O-ring 62 is pressed and tightly adhered to the end face 23a and the inner surface 27a of the second side end by the end face 23a of the first cylindrical portion 23. This ensures airtightness (liquid tightness) between the internal and external spaces formed by the first container 20A and the second container 20B.

[0074] (Equipment-side first loading / unloading section 40A)

[0075] like Figure 2 and Figure 4As shown, a device-side first loading / unloading portion 40A is formed in a cylindrical fluid inlet 25 that extends to one side (upstream) from the center of the first end portion 24 in the first container 20A and has a smaller diameter than the first cylindrical portion 23. The device-side first loading / unloading portion 40A includes a slot portion 41 provided at the front end of the fluid inlet 25, an operating protrusion 42 that protrudes radially outward from the first end portion 24 on the outer surface of the fluid inlet 25, and an operating member 43 that is inserted into the slot portion 41 and can move radially in a direction orthogonal to the axial direction P of the device-side first loading / unloading portion 40A.

[0076] Figure 7 This diagram shows the state of the operating member 43 disassembled from the first loading / unloading section 40A on the device side. The operating member 43 includes an insertion part 44 inserted into the slot section 41, a pressing part 45 extending from a portion of the outer periphery of the insertion part 44 in a direction orthogonal to the insertion part 44 (axial direction P of the first cylindrical section 23), and a force-applying part 46. The force-applying part 46 extends from a position on the inner diameter side of the insertion part 44 relative to the pressing part 45, at a certain distance from the insertion part 44, and is substantially parallel to the insertion part 44.

[0077] A generally elliptical through hole 47 is formed in the insertion part 44. The minor diameter r1 of the through hole 47 is approximately equal to the inner diameter r2 of the fluid inlet 25.

[0078] When the operating member 43 is inserted into the slot 41, the force-applying part 46 abuts against the operating protrusion 42. At this time, the surface in the long axis direction of the inner surface of the through hole 47 of the insertion part 44 opposite to the side where the force-applying part 46 is provided becomes the locking surface 49 for locking the second loading and unloading member 80 (described later).

[0079] (Second loading / unloading section 50B on the device side)

[0080] like Figure 4 As shown, a device-side second loading / unloading portion 50B is formed on a cylindrical fluid outlet 28 that extends from the center of the second end portion 27 in the second container 20B to the other side, i.e., downstream, and has a smaller diameter than the second cylindrical portion 26. The device-side second loading / unloading portion 50B includes a first circumferential groove 51 provided on the outer periphery of the base end side of the fluid outlet 28, and a second circumferential groove 52 provided on the outer periphery of the front end side of the fluid outlet 28. An O-ring 53 is installed on the second circumferential groove 52.

[0081] (Second loading / unloading component 80)

[0082] like Figure 2As shown, an upstream pipe 101U is connected to the first loading / unloading section 40A on the device side of the inlet side of the cleaning and filtering device 1. A second loading / unloading component 80 is installed on the upstream pipe 101U, which has a pipe-side second loading / unloading section 50A with the same structure as the second loading / unloading section 50B on the device side of the outlet side of the cleaning and filtering device 1.

[0083] The second loading / unloading component 80 includes an insertion part 81 inserted into the upstream side pipe 101U, an abutment part 82 abutting against the front end of the upstream side pipe 101U, and a pipe-side second loading / unloading part 50A extending from the abutment part 82 to the outside of the upstream side pipe 101U.

[0084] The second loading / unloading section 50A on the pipe side includes a first circumferential groove 51 on the outer periphery of the upstream side, having an outer diameter that allows insertion into the inner diameter side of the first loading / unloading section 40A on the device side, and a second circumferential groove 52 on the outer periphery of the downstream side. An O-ring 53 is installed on the second circumferential groove 52. It should be noted that the same reference numerals are used in the second loading / unloading section 50A on the pipe side as in the second loading / unloading section 50B on the device side.

[0085] It should be noted that the locking mechanism is composed of the locking surface 49 provided on the operating member 43, the pressing part 45 provided on the operating member 43, and the first circumferential groove 51 of the device-side second loading / unloading part 50B or the pipe-side second loading / unloading part 50A described later, which locks and unlocks the device-side second loading / unloading part 50B or the pipe-side second loading / unloading part 50A relative to the pipe-side first loading / unloading part 40B or the device-side first loading / unloading part 40A.

[0086] That is, in this embodiment, the locking mechanism can lock and unlock the first loading and unloading part 40B on the pipe side and the second loading and unloading part 50A on the pipe side or the second loading and unloading part 50B on the device side. In addition, it can lock and unlock the first loading and unloading part 40A on the device side and the second loading and unloading part 50A on the pipe side.

[0087] (Installation action)

[0088] The installation of the second loading and unloading part 50A on the pipe side of the second loading and unloading component 80 of the upstream pipe 101U and the first loading and unloading part 40A on the device side of the fluid inlet 25 of the cleaning and filtering device 1 shall be carried out as follows.

[0089] Figure 8 This diagram illustrates the steps of installing the second loading / unloading part 50A of the second loading / unloading component 80 located on the upstream side pipe 101U onto the first loading / unloading part 40A on the device side of the cleaning and filtering device 1.

[0090] like Figure 8As shown in (a), when the second loading / unloading part 50A on the pipe side of the second loading / unloading component 80 is not inserted into the first loading / unloading part 40A on the device side of the cleaning filter device 1, the force application part 46 abuts against the operating protrusion 42. At this time, the position of the locking surface 49 of the through hole 47 provided in the lower part of the insertion part 44 is the position P1 shown in the figure.

[0091] like Figure 8 As shown in (b), when the second loading and unloading part 50A on the pipe side of the second loading and unloading component 80 is inserted into the first loading and unloading part 40A on the device side of the cleaning filter device 1, the front end of the second loading and unloading part 50A on the pipe side abuts against the locking surface 49, and the locking surface 49 is pressed downward from the position P1 shown in the figure.

[0092] Therefore, as Figure 8 As shown in (c), since the front end of the force-applying part 46 abuts against the operating protrusion 42, it cannot move downwards. However, the base end of the force-applying part 46 moves downwards as indicated by the arrow in the figure, causing the force-applying part 46 to flex. Then, the position of the locking surface 49 moves from position P1 to position P2 as shown in the figure. As a result, the tube-side second loading / unloading part 50A of the second loading / unloading member 80 can be inserted into the interior of the device-side first loading / unloading part 40A of the cleaning filter device 1.

[0093] like Figure 8 As shown in (d), the second loading and unloading part 50A on the pipe side of the second loading and unloading part 80 is inserted into the front end of the first loading and unloading part 40A on the device side of the cleaning filter device 1. When the first circumferential groove 51 of the second loading and unloading part 50A on the pipe side reaches the position of the insertion part 44, the locking surface 49 moves from position P2 to position P1 in the figure by the restoring force of the force application part 46.

[0094] Thus, the locking surface 49 is embedded in the first circumferential groove 51, thereby achieving a locked state that prevents the first loading / unloading part 40A on the device side and the second loading / unloading part 50A on the pipe side from falling off, and the cleaning filter device 1 is connected to the upstream side pipe 101U.

[0095] In this way, the installation of the second loading / unloading component 80 of the upstream side pipe 101U and the device-side first loading / unloading part 40A of the cleaning and filtering device 1 can be performed by a single-touch operation, simply inserting the second loading / unloading component 80 of the upstream side pipe 101U into the device-side first loading / unloading part 40A of the cleaning and filtering device 1. Therefore, the connection between the upstream side pipe 101U and the cleaning and filtering device 1 is easy.

[0096] (First loading / unloading component 90)

[0097] In addition, such as Figure 2As shown, a downstream pipe 101D is connected to the second loading / unloading section 50B on the device side of the outlet side of the cleaning and filtering device 1. A first loading / unloading member 90 is installed on the downstream pipe 101D, which has a pipe-side first loading / unloading section 40B having the same structure as the device-side first loading / unloading section 40A on the inlet side of the cleaning and filtering device 1.

[0098] like Figure 2 and Figure 4 As shown, the first loading and unloading component 90 includes an insertion part 91 that is inserted into the downstream side tube 101D, and a first loading and unloading part 40B on the tube side that extends outward from the front end of the downstream side tube 101D.

[0099] The first loading / unloading section 40B on the pipe side has an inner diameter that allows it to be inserted into the second loading / unloading section 50B on the device side. Like the first loading / unloading section 40A on the device side, it includes a slot 41, an operating protrusion 42, and an operating member 43. It should be noted that the same reference numerals are used for the portions of the first loading / unloading section 40B that are identical to those in the first loading / unloading section 40A on the device side.

[0100] (Installation action)

[0101] The installation of the pipe-side first loading / unloading portion 40B of the first loading / unloading component 90 provided on the downstream side of the downstream pipe 101D and the device-side second loading / unloading portion 50B provided on the fluid outlet 28 of the cleaning and filtering device 1 is the same as the installation of the pipe-side second loading / unloading portion 50A of the second loading / unloading component 80 provided on the upstream side of the upstream pipe 101U and the device-side first loading / unloading portion 40A provided on the fluid inlet 25 of the cleaning and filtering device 1, therefore, the description is omitted.

[0102] The installation of the first pipe-side mounting / unmounting part 40B of the downstream side pipe 101D and the second device-side mounting / unmounting part 50B of the cleaning and filtering device 1 can also be performed by a single-touch operation, simply inserting the first pipe-side mounting / unmounting part 40B of the downstream side pipe 101D into the second device-side mounting / unmounting part 50B of the cleaning and filtering device 1. Therefore, the connection between the downstream side pipe 101D and the cleaning and filtering device 1 is easy.

[0103] (Pre-charge)

[0104] return Figure 1 During pre-priming, the blood circulation loop 100 is configured as a circulation loop that does not pass through the patient's body.

[0105] First, a tube 102 with an insertion needle 103 at its front end is connected to a blood storage tank 3, and the insertion needle 103 is connected to a pre-rinsing container (not shown) such as saline solution. When the blood pump 4 is activated, the pre-rinsing fluid such as saline solution flows into the blood storage tank 3. The fluid flowing into the blood storage tank 3 is drawn by the blood pump 4 and flows through flow path L1, then through the artificial lung 5, where it is separated into two flow paths L2 and L3. The fluid flowing through one flow path L2 enters the blood filtration device 6. The fluid flowing through the other flow path L3 is further separated into two flow paths L4 and L5. The fluid in flow path L4 enters the blood filtration device 6, merges with the fluid in flow path L2, flows in flow path L6, and returns to the blood storage tank 3. The fluid in flow path L5 is further separated into two flow paths L7 and L8. The fluid in flow path L7 flows in the cleaning filter device 1.

[0106] Here, in the cleaning and filtering device 1, foreign matter within the blood circulation loop 100, flowing along with the fluid, is removed. The fluid, after being separated into flow paths L9 and L10, merges again and flows in flow path L7, merges with the fluid in flow path L8, and flows in flow path L5, flowing into the blood storage tank 3. Air present within the blood circulation loop 100 also flows along with the fluid and into the blood storage tank 3.

[0107] like Figure 5 As shown, when the first container 20A is connected to the second container 20B, the O-ring 62 is pressed by the end face 23a of the first cylindrical portion 23 and the inner surface 27a of the second side end, which can maintain the airtightness (liquid tightness) between the internal space and the external space formed by the first container 20A and the second container 20B.

[0108] In this state, when the pre-fluid flows, the fluid flows as indicated by the arrow in the figure. At this time, air bubbles 70 may remain in the tiny gap created between the O-ring 62 and the protrusion 60.

[0109] However, in the implementation method, such as Figure 6 As shown, a slit 61 is formed in the protrusion 60. Therefore, as Figure 6 As indicated by the middle arrow, a portion of the fluid flowing on the inner surface side of the second container 20B can flow through the slit 61 in the gap generated between the O-ring 62 and the protrusion 60. Therefore, the bubble 70 between the O-ring 62 and the protrusion 60 can also flow out with the fluid and flow into the blood storage tank 3.

[0110] Then, stop the operation of blood pump 4 after the pre-flush is complete.

[0111] (Removal of filter device 1)

[0112] Figure 9This diagram illustrates the removal steps of cleaning filter device 1. After pre-rinsing, as... Figure 9 As shown in (a), first, the upper and lower parts clamping the cleaning filter device 1 are clamped together. Then, the second loading and unloading part 50A of the upstream side pipe 101U in the upstream side is removed from the first loading and unloading part 40A of the device side of the cleaning filter device 1.

[0113] Figure 10 The diagram illustrates the disassembly steps of the second loading / unloading section 50A on the pipe side and the first loading / unloading section 40A on the device side.

[0114] First, when Figure 10 When the pressing part 45 is pressed in the direction of the arrow shown in (a), the insertion part 44 moves downward in the figure. As a result, the locking surface 49 of the through hole 47 provided in the insertion part 44 separates from the bottom surface of the first circumferential groove 51, resulting in an unlocked state where the locking of the device-side first loading / unloading part 40A and the pipe-side second loading / unloading part 50A is released. Thus, as... Figure 10 As shown in (b), the second loading and unloading section 50A on the pipe side can be pulled out from the first loading and unloading section 40A on the device side.

[0115] As described above, removing the pipe-side second loading / unloading portion 50A of the second loading / unloading member 80 of the upstream side pipe 101U from the device-side first loading / unloading portion 40A of the cleaning and filtering device 1 can also be performed by a single-touch operation that pulls the second loading / unloading member 80 of the upstream side pipe 101U from the device-side first loading / unloading portion 40A of the cleaning and filtering device 1 simply by pressing the pressing portion 45. Therefore, the upstream side pipe 101U can be easily removed from the cleaning and filtering device 1.

[0116] Furthermore, the removal of the first detachment portion 40B on the pipe side of the downstream side pipe 101D and the second detachment portion 50B on the device side of the cleaning and filtering device 1 is the same as removing the second detachment component 80 of the upstream side pipe 101U from the first detachment portion 40A on the device side of the cleaning and filtering device 1. This can be performed with a single-touch action, where the first detachment portion 40B on the pipe side of the downstream side pipe 101D is pulled out from the second detachment portion 50B on the device side of the cleaning and filtering device 1 simply by pressing the pressing part 45. Therefore, the downstream side pipe 101D can be easily removed from the cleaning and filtering device 1.

[0117] Then, as Figure 9 As shown in (b), the cleaning and filtering device 1, which is removed from the second loading and unloading part 50A of the second loading and unloading part 80 inserted into the upstream side tube 101U and the first loading and unloading part 40B of the first loading and unloading part 90 inserted into the downstream side tube 101D, is removed by the blood circulation circuit 100.

[0118] Next, as Figure 9As shown in (c), the second loading / unloading part 50A of the second loading / unloading component 80 of the upstream side pipe 101U and the first loading / unloading part 40B of the downstream side pipe 101D are connected. At this time, as described above, the second loading / unloading part 50A and the first loading / unloading part 40B of the pipe side can be connected by a single contact. Therefore, the connection between the upstream side pipe 101U and the downstream side pipe 101D is easy.

[0119] It should be noted that after connecting the pipes to each other, Figure 1 The flow paths L9 and L10 shown are cut off along the way, and by connecting the cut sections with conduits, the blood circulation loop 100 becomes an artificial heart-lung system that removes foreign matter and leaves no residual air bubbles.

[0120] Additionally, in cases where the fluid handling device is an artificial lung, blockages can sometimes occur during its use. In such cases, replacement of the blocked fluid handling device or the entire blood tubing system, including the fluid handling device other than the artificial lung, may be considered.

[0121] In this case, it is also possible to easily remove the blocked fluid handling device between the upstream side pipe 101U and the downstream side pipe 101D and install other fluid handling devices, and it has the effect of reducing the cost of replacing the entire external circulation system including the pipeline.

[0122] The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments and can be implemented in various ways.

[0123] For example, the construction of the locking mechanism is not limited to the locking surface 49 and operating component 43 as in the embodiment; other constructions are also possible as long as they can be installed and removed with a single touch.

[0124] In this embodiment, the device-side first loading and unloading part 40A and the pipe-side first loading and unloading part 40B are provided at the fluid inlet 25 of the cleaning and filtering device 1 and the end of the downstream pipe 101D, and the pipe-side second loading and unloading part 50A and the device-side second loading and unloading part 50B are provided at the end of the upstream pipe 101U and the fluid outlet 28 of the cleaning and filtering device 1.

[0125] However, this is not a limitation. The second loading and unloading part 50A on the pipe side and the second loading and unloading part 50B on the device side may also be provided at the end of the downstream pipe 101D and the fluid inlet 25 of the cleaning and filtering device 1. The first loading and unloading part 40A on the device side and the first loading and unloading part 40B on the pipe side may also be provided at the fluid outlet 28 of the cleaning and filtering device 1 and the end of the upstream pipe 101U.

[0126] Explanation of reference numerals in the attached figures

[0127] 1. Cleaning and filtration equipment (fluid handling equipment)

[0128] 5. Artificial Lung

[0129] 10 Filter Material

[0130] 10A Supported Spacer

[0131] 10B Hollow Wire Wound Body

[0132] 11-urethane resin

[0133] 12-core component

[0134] 13 spacer components

[0135] 14 hollow wires

[0136] 20 containers

[0137] 20A No. 1 container

[0138] 20B Container 2

[0139] 23 First tube section

[0140] 23a end face

[0141] 24 First end face

[0142] 25 Fluid inlet (1st fluid inlet and outlet)

[0143] 26 Second cylinder section

[0144] 27 Second end face

[0145] 27a inner surface

[0146] 28. Fluid outlet (Second fluid inlet / outlet)

[0147] 30A First Connecting Section

[0148] 30B Second Connector

[0149] 32-card joint protuberance

[0150] 33 Annular protrusions

[0151] 34 bevel

[0152] 37-pin engagement hole

[0153] 38 Front-end section

[0154] 40A Unit Side First Loading / Unloading Section

[0155] 40B Pipe Side First Loading and Unloading Section

[0156] 41. Slot section

[0157] 42 Operating protrusion

[0158] 43 Operating components (locking mechanism)

[0159] 44. Insertion section (locking mechanism)

[0160] 45 Pressing Part

[0161] 46 Force-Exerting Unit

[0162] 47 Through Holes

[0163] 49. Locking surface (locking mechanism)

[0164] 50A Pipe Side Second Loading and Unloading Section

[0165] 50B Unit Side 2 Loading / Unloading Section

[0166] 51. First circumferential groove (locking mechanism)

[0167] 60 protrusions

[0168] 61 slits

[0169] 62O ring

[0170] 70 bubbles

[0171] 80 Second loading and unloading component

[0172] 81 Insertion Section

[0173] 82 Contact Department

[0174] 90 First loading and unloading component

[0175] 91 Insertion Section

[0176] 100 Blood Circulation Circuit (Extracorporeal Circulation Circuit)

[0177] 101U upstream side pipe (second pipe)

[0178] 101D downstream side pipe (pipe number 1)

Claims

1. A filtration device used during the pre-flush of the external circulation loop, comprising: The first container has a first cylindrical portion, a first end portion covering one end of the first cylindrical portion, and a first fluid inlet / outlet extending axially from the first end portion toward the first cylindrical portion; The second container has a second cylindrical portion connected to the other end of the first container at one end, a second end portion covering the other end of the second cylindrical portion, and a second fluid inlet / outlet extending axially from the second end portion toward the second cylindrical portion. A protrusion with a slit provided along the circumference and in a discontinuous manner is formed on the outer peripheral side of the inner surface of the second end portion. An O-ring, which is positioned on the outer periphery of the protrusion, is held between the end face of the first cylindrical portion and the inner surface of the second end face; and The filter material is housed within the internal space formed by the connection of the first container and the second container. The slits are formed evenly in the circumferential direction. The filtration device is configured such that the air bubbles between the O-ring and the protrusion can flow out through the slit together with the fluid flowing on the inner surface side of the second container.

2. The filtration device as claimed in claim 1, wherein, The first cylinder is disposed on the fluid inlet side, and the second cylinder is disposed on the fluid outlet side.

3. The filtration device as described in claim 1 or 2, wherein, The extracorporeal circulation circuit includes an artificial lung.

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