JP7325231B2 - Weighing chamber, channel holding device and extracorporeal circulation device - Google Patents

Description

TECHNICAL FIELD The present invention relates to metering chambers, channel holding devices, and extracorporeal circulation devices.

For example, extracorporeal circulation therapy such as dialysis therapy and plasma exchange therapy is performed using an extracorporeal circulation device such as a blood purification device. This blood purification apparatus includes, for example, a blood circuit that supplies the patient's blood to a blood purifier for purification and returns it to the patient, a dialysate circuit that supplies and discharges dialysate to and from the blood purifier, and a replacement fluid circuit that replenishes the blood with replacement fluid. etc. (see Patent Documents 1 and 2). In order to control, for example, the amount of water removed from a patient, the blood purification apparatus controls the amount of dialysate supplied to the blood purifier, the amount of waste dialysate discharged from the blood purifier, and the blood circuit. A measuring chamber for measuring the total amount of replacement fluid is provided (see Patent Document 1). Alternatively, in order to control the amount of water removed from a patient, for example, the blood purifying apparatus can control the amount of dialysate supplied to the blood purifier, the amount of waste dialysate discharged from the blood purifier, and the amount of dialysate supplied to the blood circuit. It has a weighing container for individually weighing the amount of replacement fluid (see Patent Document 2).

The measuring chamber described above is formed in a panel shape, and includes reservoirs for storing respective liquids and flow paths for taking the liquids into and out of the respective reservoirs. These channels are connected to the bottom of the reservoir (see Patent Documents 1 and 3). Further, the measuring chamber constitutes a panel circuit together with a heating panel for warming replacement fluid to body temperature and a frame holding the heating panel (see Patent Document 4). The frame of the panel circuit holds tubes for fluid flow to and from the metering chambers and heating panels. This panel circuit is attached to and detached from the main body of the blood purification apparatus during use.

The weighing container described above is formed in the shape of a bag, and includes a storage section for storing each liquid and a tube for taking the liquid into and out of each storage section. These tubes are inserted from the top of the reservoir into the reservoir, and part of the tubes are arranged inside the reservoir (see Patent Document 2).

Japanese Patent No. 5160455 JP 2010-162226 A JP 2015-181757 A JP 2015-073847 A

By the way, since the above-mentioned measuring chamber is usually provided in the lower part of the panel circuit, the flow path connected to the bottom of the storage part is arranged up to the upper part through the outside of the storing part of the measuring chamber main body. . For this reason, it is necessary to provide a flow path that bypasses the reservoir in the main body of the measurement chamber, and the total area (total length) of the seal that forms the flow path increases, increasing the risk of liquid leakage. ing.

On the other hand, in the weighing container described above, a part of the tube is arranged inside the reservoir, but after the tube part is manufactured, a separate step of fixing it to the reservoir is required, which complicates the manufacturing process.

The present application has been made in view of this point, and one of the objects thereof is to provide a measuring chamber for an extracorporeal circulation device that can reduce the risk of liquid leakage and improve manufacturing efficiency.

As a result of intensive studies, the inventors of the present invention have found that the above problem can be solved by providing the measuring chamber with an internal flow path that passes through the internal space of the reservoir, and integrally molding the internal flow path and the reservoir. The present invention has been completed.

That is, the present invention includes the following aspects.
(1) A measuring chamber connected to a liquid channel of an extracorporeal circulation device for measuring the liquid flowing through the liquid channel, comprising: a reservoir for storing the liquid; an internal flow path communicating with a lower portion of the internal space through the internal space, wherein the reservoir and the internal flow path are integrally molded.
(2) The metering chamber according to (1), wherein the internal channel forms part of the inner wall of the reservoir.
(3) The metering chamber according to (1) or (2), wherein the internal channel has an opening that opens to the surface of the body of the metering chamber above the reservoir and is connected to a tube.
(4) The weighing chamber according to (3), further comprising a holding section that holds a tube connected to the opening.
(5) The main body of the measuring chamber is formed in a panel shape that encloses the storage part, and the holding part holds the tube in the same plane as the surface of the main body of the measuring chamber at the edge of the measuring chamber. 4. The metering chamber of claim 4, having a retaining member that holds facing up.
(6) The weighing chamber according to any one of (1) to (5), wherein an upper portion of the reservoir is provided with a vent.
(7) According to (6), the upper portion of the reservoir is provided with a narrow portion that is narrower than the rest of the internal space of the reservoir, and the vent is provided in the narrow portion. of the weighing chamber.
(8) The weighing chamber according to any one of (1) to (7), wherein a plurality of storage portions are arranged side by side in the left-right direction.
(9) A channel holding device that is detachable from the main body of the extracorporeal circulation device and holds at least a part of the liquid channel of the extracorporeal circulation device, wherein the measurement according to any one of (1) to (8). A channel holding device with a chamber.
(10) A frame shape having a liquid channel through which liquid flows, a heating panel for heating the liquid flowing through the liquid channel, and an opening in the center, in which the heating panel is arranged in the opening The flow path retention device according to (9), further comprising: a frame of, wherein the metering chamber is located below the frame.
(11) An extracorporeal circulation device comprising the channel holding device according to (9) or (10).

ADVANTAGE OF THE INVENTION According to this invention, the risk of the liquid leakage of the measuring chamber of an extracorporeal circulation device can be reduced, and manufacturing efficiency can be improved.

It is a perspective view showing an example of a blood purification device. It is an explanatory view showing an example of composition of a liquid circuit. It is a front view of a heating panel. Fig. 2 is a perspective view of the metering chamber; It is a front view explaining the structure of a measuring chamber. FIG. 4 is an explanatory view of a vertical cross section of the measuring chamber viewed from the A direction for explaining the configuration inside the reservoir of the measuring chamber; FIG. 4 is an explanatory view of a vertical cross section of the measurement chamber viewed from direction B, showing the configuration of the opening of the first reservoir and the internal flow path; FIG. 4 is an explanatory view of a vertical cross section of the weighing chamber viewed from direction B, showing the configuration of the vent of the first reservoir; FIG. 10 is an explanatory view of a vertical cross section of the measuring chamber viewed from direction B, showing the configuration of the openings of the second and third reservoirs and the internal flow path; FIG. 4 is an explanatory view of a vertical cross section of the weighing chamber seen from direction B showing the configuration of the vents of the second and third reservoirs; FIG. 4 is a perspective view of the metering chamber seen from the back; 4 is an enlarged view of a tube fixing portion to which a tube is fixed; FIG.

An example of a preferred embodiment of the present invention will be described below with reference to the drawings. Unless otherwise specified, the positional relationship such as top, bottom, left, and right of the drawings is based on the positional relationships shown in the drawings. The dimensional ratios of the drawings are not limited to the illustrated ratios. Furthermore, the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention only to those embodiments. Also, the present invention can be modified in various ways without departing from the gist thereof.

<Blood purification device>
FIG. 1 is an explanatory diagram showing the outline of the configuration of a blood purification device 1 as an extracorporeal circulation device provided with a measuring chamber according to this embodiment. The blood purification device 1 has, for example, a device body portion 10, an operation panel portion 11, a carriage portion 12, a pole portion 13, a liquid circuit 14, and the like.

The device main body 10 is configured to incorporate or attach various devices, devices, and members necessary for executing blood processing. For example, the apparatus main body 10 includes various clamp groups 20 for opening and closing the flow path of the liquid circuit 14, a pump group 21 for pumping the liquid in the liquid circuit 14, and a pressure sensor (see FIG. 1) for detecting the pressure of the liquid in the liquid circuit 14. (not shown) and a blood purifier (described later) for purifying blood are incorporated or can be attached. A door 30 is provided on the side surface of the apparatus main body 10, and a plate-like heater 31 is provided in a portion exposed when the door 30 is opened. A panel circuit 40 as a channel holding device that holds a part of the liquid circuit 14 can be attached to the device main body 10 . The panel circuit 40 has a heating panel 50 and a weighing chamber 51 . By attaching the panel circuit 40 to the heater 31 portion of the apparatus main body 10 and supplying heat from the heater 31 to the heating panel 50 , the liquid flowing through the heating panel 50 can be heated. Also, by installing the weighing chamber 51 in the weighing device 32 of the apparatus main body 10, the weight of the weighing chamber 51 can be measured.

The operation panel unit 11 is, for example, a touch panel, and can be used to input various settings for blood treatment and to display the operation status of blood treatment. A liquid bag such as a dialysate bag or a replacement fluid bag, which will be described later, used in blood treatment can be suspended from the pole portion 13 .

<Liquid circuit>
FIG. 2 is an explanatory diagram showing an example of the configuration of the liquid circuit 14 for performing dialysis therapy. For example, the fluid circuit 14 has a blood purifier 70, a blood circuit 71, a dialysate supply circuit 72, a waste fluid circuit 73, a replacement fluid circuit 74, and the like. The liquid circuit 14 is detachable from the device main body 10 of the blood purification device 1 .

The blood purifier 70 is, for example, a cylindrical membrane module having a hollow fiber membrane as a purifying membrane, and can separate unnecessary components from blood.

The blood circuit 71 includes, for example, a blood collection line 90 that connects the blood collection unit 80 and the blood purifier 70 and a blood return line 91 that connects the blood purifier 70 and the blood return unit 81 . The blood collection line 90 and the blood return line 91 are mainly composed of soft tubes. The blood collection line 90 is connected to the blood side nozzle at the inlet of the blood purifier 70 , and the blood return line 91 is connected to the blood side nozzle at the outlet of the purification membrane of the blood purifier 70 .

The blood collection line 90 is provided with, for example, a compressing pump 100 . The blood return line 91 is provided with a drip chamber 110 and a pressure sensor.

The dialysate supply circuit 72 has a dialysate bag 120 and a dialysate supply line 121 that connects the dialysate bag 120 and the dialysate-side nozzle of the blood purifier 70 . The dialysate supply line 121 is mainly composed of a soft tube, but partially composed of the liquid flow path of the heating panel 50 and the liquid flow path of the measuring chamber 51 . A dialysate pump 122 is provided in the dialysate supply line 121 .

The waste liquid circuit 73 has a waste liquid line 130 that connects the dialysate side nozzle of the blood purifier 70 and the waste section of the blood purifier 70 . The waste liquid line 130 is mainly composed of a soft tube, but partially composed of the liquid flow path of the measuring chamber 51 . The waste liquid line 130 is provided with, for example, a filtration pump 131 .

The replacement fluid circuit 74 has a replacement fluid bag 140 and a replacement fluid line 141 connecting the replacement fluid bag 140 and the blood return line 91 . The replacement fluid line 141 is mainly composed of a soft tube, but partially composed of the liquid flow path of the heating panel 50 and the liquid flow path of the measuring chamber 51 . A replacement fluid pump 142 is provided in the replacement fluid line 141 .

In the liquid circuit 14 described above, for example, blood purification processing for dialysis therapy is performed. For example, in the blood circuit 71 , the patient's blood is sent from the blood collection section 80 to the blood side of the purification membrane of the blood purifier 70 , passes through the blood purifier 70 , and is returned to the patient from the blood return section 81 . At this time, the dialysate is sent to the dialysate side of the purification membrane of the blood purifier 70 in the dialysate supply circuit 72 and then discharged through the waste liquid circuit 73 . In the blood purifier 70, unnecessary components in the blood passing through the blood side of the purification membrane flow out to the dialysate side through the purification membrane and are discharged together with the dialysate. On the other hand, the replacement fluid is supplied to the blood circuit 71 in the replacement fluid circuit 74, and the blood is replenished with a predetermined component.

<Panel circuit>
The panel circuit 40 shown in FIG. 2 holds, for example, at least a portion of the dialysate supply line 121, at least a portion of the waste fluid line 130, and at least a portion of the replacement fluid line 141, and is configured to be detachable from the device main body 10. ing. The panel circuit 40 includes, for example, a rectangular frame-shaped frame 160 , a heating panel 50 attached to an opening inside the frame 160 , a soft tube 161 fixed to the frame 160 , and arranged below the frame 160 . It has a metering chamber 51 . The heating panel 50 and tube 161 and the metering chamber 51 and tube 161 are connected together and form part of the liquid flow path of the liquid circuit 14 .

The frame 160 is formed in a square frame shape and is made of hard resin or the like. The frame 160 has an opening 160a in the center, and the heating panel 50 is arranged in the opening 160a. Locking portions 160b for locking the heating panel 50 are provided at the upper and lower edges of the opening 160a. The frame 160 is provided with a plurality of fixing parts (not shown) for fixing the tubes 161 connected to the heating panel 50 and the measuring chamber 51 .

As shown in FIG. 3, the heating panel 50 has a substantially rectangular thin plate shape. The heating panel 50 has two continuous liquid flow paths 182 from an inlet portion 180 to an outlet portion 181 . The entrance portion 180 and the exit portion 181 are provided on one short side (upper side) in the longitudinal direction of the panel body. Each liquid channel 182 has a meandering portion 200 that extends downward while meandering left and right from the inlet portion 180 , and an outlet portion 181 that passes straight from the lower portion of the meandering portion 200 along the side of the meandering portion 200 . It has a straight portion 201 to be connected. The two liquid channels 182 are arranged side by side on the left and right sides of the heating panel 50 . The inlet portion 180 and the outlet portion 181 constitute a connecting portion for connecting the tube 161 to the liquid flow path 182 .

The heating panel 50 has a locked portion 210 that is locked to the locking portion 160 b of the frame 160 . For example, two locked portions 210 are provided on each of the upper and lower short sides in the longitudinal direction of the panel body.

As shown in FIGS. 2 and 3, the two liquid flow paths 182 of the heating panel 50 are connected to the tube 161 of the dialysate supply line 121 and the tube 161 of the replacement fluid line 141 . As a result, one liquid channel 182 forms part of the dialysate supply line 121 and the other liquid channel 182 forms part of the replacement fluid line 141 .

<Weighing chamber>
As shown in FIG. 2, metering chamber 51 is provided below panel circuit 40 . In order to manage the amount of water removed from the patient, the measuring chamber 51 measures the amount of dialysate supplied to the blood purifier 70, the amount of dialysate discharged from the blood purifier 70, and the amount of dialysate discharged from the blood purifier 70, and the amount of dialysate supplied to the blood circuit 71. It is a chamber for measuring the total amount of replacement fluid.

As shown in FIGS. 4 and 5, the metering chamber 51 is formed in a substantially square panel shape and is made of resin, for example. The metering chamber 51 has, for example, three reservoirs 230, 231, 232, internal channels 240, 241, 242 passing through the interiors of the respective reservoirs 230, 231, 232, internal channels 240, 241, 242, etc. A holding portion 250 is provided for holding a tube 161 (connection tubes 370 to 375 to be described later) connected to the . Each internal channel 240 , 241 , 242 is integrally formed with the corresponding reservoir 230 , 231 , 232 and forms part of the corresponding reservoir 230 , 231 , 232 .

The reservoirs 230 , 231 , 232 are arranged side by side in the horizontal direction at the bottom of the main body of the measuring chamber 51 . The first reservoir 230 is located on the left side of the main body of the metering chamber 51 when viewed from the surface 51a side (direction A in FIG. 4), the second reservoir 231 is positioned in the center, and the third reservoir 232 is positioned in the center. is located on the right. As shown in FIGS. 5 and 6, the reservoirs 230, 231, and 232 each have an internal space R, for example, cylindrical portions 260, 261, and 262 provided at the bottom and cylindrical portions 260, 261, and 262 provided at the top. The narrowed portions 270, 271, 272 are provided. The cylindrical portion 260 has a shape that is vertically longer than the cylindrical portions 261 and 262 .

Lower portions of the cylindrical portions 260 , 261 , 262 are closed by a lid 280 . The lid 280 may be made of the same material as, for example, the other parts of the reservoirs 230, 231, and 232, or may be made of a different material. The lid body 280 is made of polycarbonate, ABS, or the like, for example. The lid body 280 has a projection 290 with a flat bottom end in the center of the bottom. The projection 290 serves as a handle when the lid 280 is adhered to the main body of the measuring chamber 51, thereby facilitating the adhesion work.

The narrow portions 270, 271, and 272 are formed in a thin rectangular parallelepiped shape in a direction (direction A) perpendicular to the surface 51a of the main body of the weighing chamber 51, as shown in FIGS. The narrowed portions 270 , 271 , 272 have a smaller dimension in the direction A perpendicular to the surface 51 a of the main body of the metering chamber 51 and a smaller volume than the reservoirs 230 , 231 , 232 .

As shown in FIGS. 6 and 7 , the internal flow path 240 of the first reservoir 230 extends from the upper narrow portion 270 of the first reservoir 230 through the internal space R of the first reservoir 230 . It communicates with the lower part of the space R. The internal flow path 240 is linearly provided along the inner wall 230a of the first reservoir 230 in the vertical direction (direction A) and the vertical direction of the surface 51a of the main body. A portion of the outer peripheral surface 240 a of the internal flow path 240 constitutes a portion of the inner wall 230 a of the first reservoir 230 . That is, the internal flow path 240 forms part of the first reservoir 230 . The internal channel 240 has an opening 300 that opens at a narrowed portion 270 at the top of the first reservoir 230 . The opening 300 opens in the surface 51a of the measuring chamber main body in a direction perpendicular to the surface 51a (direction A). Therefore, the internal flow path 240 extends from the opening 300 through the internal space R of the first reservoir 230 in the direction A and then downward.

As shown in FIGS. 6 and 8, the narrow portion 270 of the first reservoir 230 is formed with a vent 310 communicating with the internal space R. As shown in FIGS. The air vent 310 is open in a direction (direction A) perpendicular to the surface 51a of the measuring chamber main body.

As shown in FIG. 6, the narrow portion 271 of the second storage portion 231 is formed longer upward than the narrow portion 270 of the first storage portion 230, and has a large volume.

As shown in FIGS. 6 and 9, the internal flow path 241 of the second reservoir 231 extends from the upper narrow portion 271 of the second reservoir 231 through the internal space R of the second reservoir 231. It communicates with the lower part of the space R. The internal flow path 241 is linearly provided along the inner wall 231a of the second reservoir 231 in the vertical direction (direction A) and the vertical direction of the surface 51a of the main body. A portion of the outer peripheral surface 241 a of the internal flow path 241 constitutes a portion of the inner wall 231 a of the second reservoir 231 . That is, the internal flow path 241 forms part of the second reservoir 231 . The internal channel 241 has an opening 320 that opens above the second reservoir 231 . The opening 320 is provided near the lower portion of the narrow portion 271 . The opening 320 opens in the surface 51a of the measuring chamber main body in a direction perpendicular to the surface 51a (direction A). Therefore, the internal flow path 241 extends from the opening 320 through the internal space R of the second reservoir 231 in the direction A and then downward.

As shown in FIGS. 6 and 10, a vent hole 330 communicating with the internal space R is formed in the narrow portion 271 of the second storage portion 231 . The air vent 330 opens in a direction perpendicular to the surface 51a of the measuring chamber body (direction A). The vent 330 is provided at the upper end of the narrow portion 271 .

As shown in FIG. 6, the narrowed portion 272 of the third storage portion 232 is vertically longer than the narrowed portion 270 of the first storage portion 230, and has a large volume.

As shown in FIGS. 6 and 9, the internal flow path 242 of the third reservoir 232 extends from the upper narrow portion 272 of the third reservoir 232 through the internal space R of the third reservoir 232. It communicates with the lower part of the space R. The internal flow path 242 is linearly provided along the inner wall 232a of the third reservoir 232 in the vertical direction (direction A) and the vertical direction of the surface 51a of the main body. A portion of the outer peripheral surface 242 a of the internal flow path 242 constitutes a portion of the inner wall 232 a of the third reservoir 232 . That is, the internal flow path 242 forms part of the third reservoir 232 . The internal channel 242 has an opening 340 that opens above the third reservoir 232 . The opening 340 is provided near the lower portion of the narrowed portion 272 . The opening 340 opens in the surface 51a of the measuring chamber main body in a direction perpendicular to the surface 51a (direction A). Therefore, the internal flow path 242 extends from the opening 340 through the internal space R of the third reservoir 232 in the direction A and then downward.

As shown in FIGS. 6 and 10, the narrow portion 272 of the third reservoir 232 is formed with a vent 350 communicating with the internal space R. As shown in FIG. The vent 350 opens in a direction perpendicular to the surface 51a of the measuring chamber body (direction A). A vent 350 is provided at the upper end of the narrowed portion 272 .

As shown in FIGS. 4 and 5, the holding portion 250 is provided in a region above the storage portions 230 , 231 , 232 on the surface 51 a of the body of the measuring chamber 51 . The holding part 250 guides the connection tubes 370 , 371 , 372 , 375 (tube 161 ) connected to the openings 300 , 320 , 340 and the air vent 310 to both ends of the top of the main body of the measuring chamber 51 . 161 is retained. The holding part 250 includes, for example, a member that grips the tube 161 from both sides, a member that holds the tube 161 from one side, a member that presses both sides or one side of the tube 161, grooves, and the like. Moreover, the holding part 250 has a pedestal, a groove, and an inclined part for changing the height of the surface 51a of the measurement chamber 51 in which the tube 161 is arranged, and can hold the tube 161 while being arranged in three dimensions.

For example, the holding part 250 has, for example, five holding members 360 to 364 that hold the tube 161 facing outward in the same plane as the surface 51a of the measuring chamber main body. For example, the holding members 360 to 362 are provided in this order from the bottom to the top at the left end of the upper portion of the weighing chamber 51, and hold the tube 161 so as to face left outward in the horizontal direction. The holding members 363 and 364 are provided in this order from the bottom to the top at the right end of the upper portion of the measuring chamber 51, and hold the tube 161 so as to face right outward in the horizontal direction.

As shown in FIG. 5 , a connection tube 370 is connected to the vent 310 of the first reservoir 230 . Connection tube 370 is held by holding member 360 . The connecting tube 370 forms part of the open-ended tube 161 of the waste line 130 of the panel circuit 40 .

A connection tube 371 is connected to the opening 300 of the first reservoir 230 . The connection tube 371 is held by the holding member 361 . The connection tube 371 forms part of the tube 161 of the waste liquid line 130 of the panel circuit 40 . As a result, the dialysate discharged from the blood purifier 70 is supplied to and discharged from the opening 300 via the connection tube 371, and is discharged from the opening 300 through the internal flow path 240 to the internal space R of the first reservoir 230. It can supply and discharge to the lower part. Therefore, the first storage unit 230 functions as a measurement unit that temporarily stores and measures the dialysate discharged from the blood purifier 70 .

A connection tube 372 is connected to the opening 320 of the second reservoir 231 . The connection tube 372 branches in the middle, one of which is held by the holding member 362 and the other of which is held by the holding member 363 . The connection tube 372 forms part of the tube 161 of the dialysate supply line 121 of the panel circuit 40 . As a result, the dialysate supplied to the blood purifier 70 is supplied to and discharged from the opening 320 through the connection tube 372, and the internal space R of the second reservoir 231 is discharged from the opening 320 through the internal flow path 241. It can supply and discharge to the lower part. Therefore, the second storage part 231 functions as a measurement part that temporarily stores and measures the dialysate to be supplied to the blood purifier 70 .

An open-ended connection tube 373 is connected to the vent 330 of the second reservoir 231 . An open-ended connecting tube 374 is connected to the vent 350 of the third reservoir 232 .

A connection tube 375 is connected to the opening 340 of the third reservoir 232 . The connection tube 375 is held by the holding member 364 . The connection tube 375 is connected to the tube 161 of the replacement fluid line 141 of the panel circuit 40 . As a result, the replacement fluid supplied to the blood circuit 71 is supplied to and discharged from the opening 340 via the connection tube 375, and flows from the opening 340 through the internal flow path 242 to the lower portion of the internal space R of the third reservoir 232. can be supplied and discharged. Therefore, the third storage part 232 functions as a measuring part that temporarily stores and measures the replacement fluid to be supplied to the blood circuit 71 .

The metering chamber 51 is metered by the metering device 32 to measure the amount of dialysate supplied to the blood purifier 70, the amount of waste dialysate discharged from the blood purifier 70, and the amount of replacement fluid supplied to the blood circuit 71. By weighing the total weight of the patient, it is possible to grasp the change in the total weight, that is, the change in the amount of water removed by the patient.

The metering chamber 51 is formed, for example, by injection molding. Further, the main body of the weighing chamber 51 is provided with a fixing portion 390 for fixing the weighing chamber 51 to another member such as the frame 160 . The fixing portion 390 is provided, for example, at a position close to the narrow portion 271 above the narrow portion 271 of the second storage portion 231 .

Further, as shown in FIG. 11, the rear surface 51b of the main body of the measurement chamber 51 is provided with a tube fixing portion 400 through which a binding band for binding the tubes 161 can be passed. The tube fixing portion 400 has, for example, a substantially inverted U shape, and is erected in an arch shape on the back surface 51b. As a result, for example, as shown in FIG. 12, the binding band 401 can be passed through the tube fixing portion 400 and the tube 161 can be bound with the binding band 401 . The metering chamber 51 can thus collectively hold a long tube 160 extending from the metering chamber 51 .

According to the present embodiment, the metering chamber 51 passes through the reservoirs 230, 231, 232 and the interior spaces R of the reservoirs 230, 231, 232 from the tops of the reservoirs 230, 231, 232 to the interior spaces R. Since the internal channels 240, 241, 242 are provided in communication with the lower portion of the measuring chamber 51, there is no need to arrange the channels outside the storage portion of the main body of the measuring chamber 51, thereby making it possible to reduce the size of the measuring chamber 51. can. In addition, since the internal channels 240, 241, 242 are formed inside the reservoirs 230, 231, 232, it is possible to reduce the number of seals for preventing liquid leakage in the entire measuring chamber 51, resulting in liquid leakage. can reduce the risk of

The reservoirs 230, 231, 232 and the internal flow paths 240, 241, 242 are integrally molded at the same time instead of being separately manufactured and then connected. can be manufactured.

Since the internal flow paths 240, 241, 242 are provided along the inner walls of the reservoirs 230, 231, 232, the internal flow paths 240, 241, 242 are easy to mold.

Since the reservoirs 230, 231, 232 and the internal flow paths 240, 241, 242 are manufactured by, for example, injection molding, their dimensional accuracy is high and there is little variation between individuals, so the variation in water removal measurement error is small.

The internal channels 240, 241, 242 have openings 300, 320, 340 that open onto the surface 51a of the metering chamber 51 above the reservoirs 230, 231, 232 so that the connecting tube 161 can be conveniently connected. can.

The metering chamber 51 includes a holding portion 250 that holds the tube 161 connected to the openings 300, 320, 340 and the vent 310 so that the tube connected to the openings 300, 320, 340 and the vent 310 161 is positioned in the metering chamber 51 to prevent the tube from closing due to external forces, for example during shipping.

The main body of the metering chamber is formed in a panel shape containing reservoirs 230, 231, 232, and the holding part 250 holds the tube 161 in the same plane as the surface 51a of the main body of the metering chamber 51 at the edge of the metering chamber 51. It has holding members 360 to 364 that hold it facing outward. As a result, the tube 161 can be pulled out from the same plane of the surface 51a of the measurement chamber 51, so that the measurement chamber 51 can be easily handled.

Vents 310, 330, and 350 are provided in the upper portions of the reservoirs 230, 231, and 232, so that liquid is preferably supplied to and discharged from the internal flow paths 240, 241, and 242 of the reservoirs 230, 231, and 232. can be done.

Narrow portions 270, 271, and 272 narrower than the cylindrical portions 260, 261, and 262 of the internal spaces R of the storage portions 230, 231, and 232 are provided in the upper portions of the storage portions 230, 231, and 232. 330 , 350 are provided in narrowed portions 270 , 271 , 272 . As a result, it is possible to prevent the liquid in the reservoirs 230 , 231 , 232 from flowing out from the vents 310 , 330 , 350 . In addition, since the narrowed portions 270, 271, 272 are thinner in the thickness direction (direction A) than the cylindrical portions 260, 262, 263, the entire measuring chamber 51 when the tubes are connected to the vents 310, 330, 350 is thickness can be reduced. In addition, the area on the surface 51a of the measuring chamber 51 for arranging the holding portion 250 and the tube can be widened.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive various modifications or modifications within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. understood as a thing.

For example, the structure of the weighing chamber 51 is not limited to the one described above. For example, the shape, arrangement, and number of storage portions of the measuring chamber 51 are not limited to those of the above embodiment. For example, the reservoirs 230 , 231 , 232 may not have a narrow portion, or may be openable and closable by the lid 280 .

The shape, arrangement, and number of internal channels 240, 241, and 242 are not limited to those of the above embodiment. For example, the internal channel may not be provided along the inner wall of the reservoir, and may pass through, for example, the center of the reservoir. Also, a plurality of internal flow paths may be provided in each reservoir. The number and arrangement of openings 300, 320, 340 and vents 310, 330, 350 are not limited to those of the above embodiments.

The retainer 250 may be of another construction, and the metering chamber 51 may not include a retainer. The manner in which the tube is laid by the holding portion 250 is not limited to that of the above embodiment. The measuring chamber 51 may contain the connection tubes 370 to 375 and the like as liquid flow paths.

Also, the configuration of the blood purification apparatus 1 having the measurement chamber 51 and the panel circuit 40 are not limited to those of the above embodiments. For example, the blood purification apparatus 1 in the above embodiment performs dialysis therapy. The present invention can also be applied to

INDUSTRIAL APPLICABILITY The present invention is useful in reducing the risk of liquid leakage in the metering chamber of an extracorporeal circulation device and improving manufacturing efficiency.

1 blood purification device 40 panel circuit 51 measurement chamber 230, 231, 232 reservoir 240, 241, 242 internal flow path 250 holder R internal space

Claims (9)

A measuring chamber connected to a liquid channel of an extracorporeal circulation device for measuring a liquid flowing through the liquid channel,
a reservoir for reserving liquid;
a main body of a measuring chamber formed in a panel shape and containing the storage part;
The upper part of the reservoir is configured to communicate with the lower part of the inner space through the inner space of the reservoir, and the upper part of the reservoir is open in a direction perpendicular to the surface of the main body of the measuring chamber. an internal channel having an opening to which the tube is connected ;
a holding part that holds a tube connected to the opening,
The holding part has a holding member that holds the tube connected to the opening facing outward in the same planar direction as the surface of the main body of the measuring chamber,
The metering chamber, wherein the reservoir and the internal channel are integrally molded. 2. The metering chamber of claim 1, wherein the internal channel forms part of the inner wall of the reservoir. 3. The weighing chamber according to claim 1, wherein the holding member holds the tube horizontally in the same plane as the surface of the body of the weighing chamber at the edge of the weighing chamber. The weighing chamber according to any one of claims 1 to 3 , wherein an upper portion of the reservoir is provided with a vent. A narrow part narrower than the other part of the internal space of the storage part is provided in the upper part of the storage part,
5. The metering chamber of claim 4 , wherein the vent is provided in the constriction. The weighing chamber according to any one of claims 1 to 5 , wherein a plurality of said reservoirs are arranged side by side in the horizontal direction. A channel holding device that is detachable from the main body of an extracorporeal circulation device and holds at least a part of a liquid channel of the extracorporeal circulation device,
A flow path holding device comprising the measuring chamber according to any one of claims 1 to 6 . a heating panel, comprising a liquid channel through which liquid flows, for heating the liquid flowing through the liquid channel;
a frame-shaped frame having an opening in the center, in which the heating panel is arranged;
8. The flow path retention device of claim 7 , wherein said metering chamber is located below said frame. An extracorporeal circulation device comprising the channel holding device according to claim 7 or 8 .

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