CN211096519U - Metering chamber, flow path holding device, and extracorporeal circulation device - Google Patents

Abstract

The utility model provides a measurement cavity, flow path retaining device and extracorporeal circulation device can seek the weeping risk that reduces extracorporeal circulation device's measurement cavity to can seek and improve manufacturing efficiency. The metering chamber (51) has: a storage unit (230, 231, 232) for storing a liquid; and internal flow paths (240, 241, 242) which are connected from the upper part of the storage sections (230, 231, 232) to the lower part of the internal space (R) through the internal spaces (R) of the storage sections (230, 231, 232), wherein each storage section (230, 231, 232) and the internal flow paths (240, 241, 242) corresponding to the storage sections are integrally formed.

Description

Metering chamber, flow path holding device, and extracorporeal circulation device

Technical Field

The utility model relates to a measurement cavity, flow path holding device and extracorporeal circulation device.

Background

For example, extracorporeal circulation treatments such as dialysis treatment and plasma exchange treatment have been performed using a blood purification apparatus as an extracorporeal circulation apparatus. The blood purification apparatus includes, for example, the following components: a blood circuit for supplying blood of a patient to a blood purifier by using the blood circuit, purifying the blood, and returning the purified blood to the patient; a dialysate circuit for supplying dialysate to the blood purifier or discharging the dialysate using the dialysate circuit; a fluid replacement circuit for replacing a fluid replacement in blood by the fluid replacement circuit (see patent documents 1 and 2). For example, a blood purification device has such a metering chamber: the metering chamber is used for controlling the water removal amount of a patient, and can meter the sum of the following liquid amounts: the amount of dialysate supplied to the blood purifier, the amount of dialysate discarded from the blood purifier, and the amount of replacement fluid supplied to the blood circuit (see patent document 1). Or, for example, a blood purification device having such a metering chamber: the metering chamber is used for controlling the water removal amount of a patient, and can respectively meter the following liquid amounts: the amount of dialysate supplied to the blood purifier, the amount of dialysate discarded from the blood purifier, and the amount of replacement fluid supplied to the blood circuit (see patent document 2).

The metering chamber has: a storage section formed in a plate shape for storing each liquid; and a flow path through which the liquid is introduced into or discharged from each of the reservoirs. These flow paths are connected to the bottom of the reservoir (see patent documents 1 and 3). The measurement chamber is integrated with a hot plate for heating the fluid infusion to the body temperature and a frame for holding the hot plate, and together they constitute a plate circuit (see patent document 4). The frame of the plate circuit holds a tube, and the tube can be used to flow a liquid into the metering chamber or the heater plate, or to flow a liquid out. In use, the plate circuit is detachably attached to the main body of the blood purification apparatus.

The measuring container comprises: a storage section formed in a bag shape for storing each liquid; and a tube for flowing the liquid into each reservoir or flowing the liquid out. These pipes are inserted into the storage portion from the upper portion of the storage portion, communicate with the interior of the storage portion, and a part of the pipes is disposed inside the storage portion (see patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5160455

Patent document 2: japanese patent application laid-open No. 2010-162226

Patent document 3: japanese laid-open patent publication (Kokai) No. 2015-181757

Patent document 4: japanese patent laid-open publication No. 2015-073847

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

Incidentally, since the metering chamber is usually provided at the lower portion of the plate circuit, the flow path connected to the bottom of the reservoir portion is disposed to the upper portion of the metering chamber body through the outside of the reservoir portion of the metering chamber body. Therefore, since the main body of the metering chamber needs to be provided with a flow path that bypasses the reservoir, the total area (total length) of the seal portion forming the flow path becomes large, and the risk of liquid leakage is high.

On the other hand, in the above-described measuring container, a part of the tube is disposed inside the reservoir portion, and after the tube is manufactured, a separate process of fixing the tube to the reservoir portion is required, which complicates the manufacturing process.

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a metering chamber of an extracorporeal circulation apparatus, which can reduce the risk of leakage of fluid and can improve the manufacturing efficiency.

Means for solving the problems

The inventors of the present invention have conducted extensive studies and, as a result, have found that the above problems can be solved by providing the internal flow path through the internal space of the storage section to the measurement chamber and integrally forming the internal flow path and the storage section until the completion of the present invention.

That is, the present invention includes the following aspects.

(1) A metering chamber connected to a liquid flow path of an extracorporeal circulation apparatus, the metering chamber for metering a liquid flowing in the liquid flow path, the metering chamber comprising: a storage section for storing a liquid; and an internal flow path which is communicated from the upper part of the storage part to the lower part of the internal space through the internal space of the storage part, wherein the storage part and the internal flow path are integrally formed.

(2) The metering chamber of (1), wherein the internal flow path constitutes a portion of an inner wall of the reservoir.

(3) The measuring chamber according to (1) or (2), wherein the internal flow path has an opening portion that opens toward a front surface of the main body of the measuring chamber at an upper portion of the reservoir portion, and a tube is connected to the opening portion.

(4) The metering chamber according to (3), characterized in that the metering chamber further has a holding portion for holding a tube connected to the opening portion.

(5) The metering chamber according to (4), wherein a main body of the metering chamber is formed in a plate shape in which the reservoir is built, and the holding portion has a holding member at an edge portion of the metering chamber, the holding member holding the tube so that the tube faces an outer side in a same plane as a front surface of the main body of the metering chamber.

(6) The metering chamber according to any one of (1) to (5), wherein a vent is provided in an upper portion of the reservoir.

(7) The measuring chamber according to (6), wherein a narrow portion which is narrower than the other portion of the internal space of the reservoir portion is provided at an upper portion of the reservoir portion, and the vent is provided at the narrow portion.

(8) The metering chamber according to any one of (1) to (7), wherein the reservoir portion is provided in plurality in a left-right direction.

(9) A flow path holding device which is detachably attached to a main body of an extracorporeal circulation device and which can hold at least a part of a liquid flow path of the extracorporeal circulation device, wherein the flow path holding device comprises any one of the measurement chambers described in (1) to (8).

(10) The flow path holding device according to (9), characterized by further comprising: a heating plate having a liquid flow path through which a liquid flows, the heating plate heating the liquid flowing through the liquid flow path; and a frame body having an opening at the center, the heating plate being disposed at the opening, and the metering chamber being disposed below the frame body.

(11) An extracorporeal circulation apparatus characterized by having the flow path retention apparatus of (9) or (10).

Effect of the utility model

Adopt the utility model discloses, can reduce the weeping risk of extracorporeal circulation device's measurement cavity to can improve manufacturing efficiency.

Drawings

Fig. 1 is a perspective view showing an example of a blood purification apparatus.

Fig. 2 is an explanatory diagram showing an example of the configuration of the liquid circuit.

Fig. 3 is a front view of the heating plate.

Figure 4 is a perspective view of the metering chamber.

Fig. 5 is a front view illustrating the structure of the metering chamber.

Fig. 6 is an explanatory view of a vertical cross section of the metering chamber as viewed from the a direction for explaining the structure in the reservoir portion of the metering chamber.

Fig. 7 is an explanatory view of a vertical cross section of the measurement chamber as viewed from the direction B, showing the configuration of the opening portion and the internal flow path of the first reservoir.

Fig. 8 is an explanatory diagram of a vertical cross section of the metering chamber as viewed from the direction B, showing the structure of the vent of the first reservoir.

Fig. 9 is an explanatory view of a vertical cross section of the measuring chamber as viewed from the direction B, showing the configurations of the openings and the internal flow paths of the second reservoir and the third reservoir.

Fig. 10 is an explanatory diagram of a vertical cross section of the metering chamber as viewed from the direction B, showing the structures of the vents of the second reservoir and the third reservoir.

Fig. 11 is a perspective view of the metering chamber as viewed from the back.

Fig. 12 is an enlarged view of a tube fixing portion to which a tube is fixed.

Description of the reference numerals

1. A blood purification device; 40. a plate circuit; 51. a metering chamber; 230. 231, 232, storage section; 240. 241, 242, internal flow path; 250. a holding section; r, inner space.

Detailed Description

Next, an example of a preferred embodiment of the present invention will be described with reference to the drawings. Unless otherwise specified, positional relationships such as top, bottom, left, and right in the drawings are regarded as based on the positional relationships shown in the drawings. The dimensional ratios in the drawings are not limited to the illustrated ratios. The following embodiments are illustrative of the present invention, and are not intended to limit the present invention to the following embodiments. Moreover, the present invention can be variously modified within a scope not departing from the gist of the present invention.

Blood purification device

Fig. 1 is an explanatory diagram showing an overview of the configuration of a blood purification apparatus 1 as an extracorporeal circulation apparatus having a metering chamber according to the present embodiment. The blood purification apparatus 1 includes, for example, an apparatus main body 10, an operation panel 11, a cart unit 12, a rod 13, a liquid circuit 14, and the like.

The device main body 10 is configured to be able to house or mount various devices, apparatuses, and members necessary for performing blood treatment in the device main body 10. For example, the following members can be built in or mounted on the apparatus main body 10: various gate groups 20 for opening and closing flow paths in the liquid circuit 14; a pump group 21 that delivers liquid in the liquid circuit 14 by pressure; a pressure sensor (not shown) for detecting the liquid pressure in the liquid circuit 14; and a blood purifier described later for purifying blood. A door 30 is provided on a side surface of the apparatus main body 10, and a flat plate-like heater 31 is provided at a portion where the door 30 is exposed after being opened. A plate-type circuit 40 as a flow path holding device capable of holding a part of the liquid circuit 14 can be attached to the device main body 10. The plate circuit 40 has a heating plate 50 and a metering chamber 51. The plate circuit 40 is attached to the heater 31 of the apparatus main body 10, and heat is supplied from the heater 31 to the heater plate 50, whereby the liquid flowing through the heater plate 50 can be heated. Further, by providing the measuring chamber 51 in the measuring device 32 of the apparatus main body 10, the weight of the measuring chamber 51 can be measured.

The operation panel unit 11 is, for example, a touch panel, and various settings for blood treatment can be input by the operation panel unit 11, and the operation state of blood treatment can be displayed on the operation panel unit 11. Infusion bags such as dialysate bags and fluid replacement bags to be described later for blood treatment can be suspended on the rod 13.

Liquid circuit

Fig. 2 is an explanatory diagram showing an example of the configuration of the liquid circuit 14 for performing the dialysis treatment. For example, the liquid circuit 14 includes a blood purifier 70, a blood circuit 71, a dialysate supply circuit 72, a waste liquid circuit 73, a substitution circuit 74, and the like. The liquid circuit 14 is detachably attached to the apparatus main body 10 of the blood purification apparatus 1.

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

The blood circuit 71 includes, for example: a blood collection flow path 90 connecting the blood collection unit 80 and the blood purifier 70; and a blood return path 91 connecting the blood purifier 70 and the blood return part 81. Both the blood collection channel 90 and the blood return channel 91 are mainly constituted by flexible tubes. The blood collection channel 90 is connected to a blood side nozzle at the inlet of the blood purifier 70, and the blood return channel 91 is connected to a blood side nozzle at the outlet of the purification membrane of the blood purifier 70.

For example, a pressure-type transfer pump 100 is provided in the blood collection channel 90. The blood return path 91 is provided with a drip chamber 110 and a pressure sensor.

The dialysate supply circuit 72 includes: a dialysate bag 120; and a dialysate supply channel 121 that connects the dialysate bag 120 and the dialysate side nozzle of the blood purifier 70. The dialysate supply path 121 is mainly constituted by a hose, but a part thereof is constituted by a liquid path in the heating plate 50 and a liquid path in the metering chamber 51. A dialysate pump 122 is provided in the dialysate supply flow path 121.

The waste liquid circuit 73 has a waste liquid channel 130, and the waste liquid channel 130 connects the dialysate side nozzle of the blood purifier 70 and the disposal unit. The waste liquid flow path 130 is mainly constituted by a hose, but a part thereof is constituted by a liquid flow path in the measurement chamber 51. For example, a filter pump 131 is provided in the waste liquid channel 130.

The fluid replacement circuit 74 includes: a fluid infusion bag 140; and a fluid infusion path 141 connecting the fluid infusion bag 140 and the blood return path 91. The fluid replacement flow path 141 is mainly constituted by a hose, but a part thereof is constituted by a liquid flow path in the heating plate 50 and a liquid flow path in the measurement chamber 51. The fluid replacement channel 141 is provided with a fluid replacement pump 142.

For example, blood purification treatment for dialysis treatment can be performed by the liquid circuit 14. For example, blood of a patient is sent from the blood collection unit 80 to the blood side of the purification membrane of the blood purifier 70 via the blood circuit 71, and after the blood is passed through the blood purifier 70, the purified blood is returned to the patient from the blood return unit 81. At this time, the dialysate is sent to the dialysate side of the purification membrane of the blood purifier 70 via the dialysate supply circuit 72, and thereafter, the dialysate is discarded via the waste liquid circuit 73. The blood purifier 70 causes unnecessary components in the blood passing through the purification membrane to flow out to the dialysate side through the purification membrane, and then discharges the unnecessary components together with the dialysate. On the other hand, the substitution liquid is supplied to the blood circuit 71 via the substitution liquid circuit 74, and the predetermined component is substituted into the blood.

Plate-type loop

The plate circuit 40 shown in fig. 2 is configured such that: at least a part of the dialysate supply channel 121, at least a part of the waste fluid channel 130, and at least a part of the fluid replacement channel 141 are held, and are detachably attached to the apparatus main body 10. The plate circuit 40 includes, for example: a frame body 160 having a square frame shape; a heating plate 50 attached to an opening on the inner side of the frame 160; a tube 161 which is soft and fixed to the frame 160; and a metering chamber 51 disposed below the frame 160. The heating plate 50 is connected to the tube 161, and the metering chamber 51 is connected to the tube 161, and they both constitute a part of the liquid flow path in the liquid circuit 14.

The frame 160 is formed in a square frame shape and is made of a hard resin or the like. The frame 160 has an opening 160a at the center, and the heater plate 50 is disposed at the opening 160 a. Locking portions 160b for locking the heater plate 50 are provided on both the upper edge and the lower edge of the opening portion 160 a. The frame 160 is provided with a plurality of fixing portions (not shown) for fixing the pipes 161 connected to the heating plate 50 and the measurement chamber 51.

As shown in fig. 3, the heating plate 50 has a substantially rectangular shape and a thin plate shape. The heating plate 50 has two paths therein, each of which is a liquid flow path 182 continuing from the inlet portion 180 to the outlet portion 181. The inlet 180 and the outlet 181 are both provided on one side (upper side) of the plate body in the longitudinal direction. Each liquid flow path 182 has: a meandering section 200 extending downward from the inlet section 180 while meandering left and right; and a straight portion 201 which passes through the side of the meandering portion 200 from the lower portion of the meandering portion 200 and is connected to the outlet portion 181. The two liquid flow paths 182 are arranged side by side in the left and right portions of the heater plate 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 heater plate 50 has a locked portion 210 that can be locked to the locking portion 160b of the frame 160. The engaged portions 210 are provided at two positions on the upper and lower short sides of the plate main body in the longitudinal direction, for example.

As shown in fig. 2 and 3, the tube 161 of the dialysate supply channel 121 and the tube 161 of the fluid replacement channel 141 are connected to the two fluid channels 182 of the heater plate 50. Thus, one of the liquid flow paths 182 constitutes a part of the dialysate supply flow path 121, and the other liquid flow path 182 constitutes a part of the fluid replacement flow path 141.

Metering chamber

As shown in fig. 2, the metering chamber 51 is provided in the lower portion of the plate circuit 40. The metering chamber 51 is a chamber that: which is used for managing the amount of water removed by the patient and can measure the sum of the amount of dialysate supplied to the blood purifier 70, the amount of dialysate discarded from the blood purifier 70, and the amount of replacement fluid supplied to the blood circuit 71.

As shown in fig. 4 and 5, the metering chamber 51 is formed in a substantially square plate shape, and is molded from, for example, resin. For example, the metering chamber 51 has, in the lower part: three storage units, namely a storage unit 230, a storage unit 231, and a storage unit 232; an internal flow path 240, an internal flow path 241, and an internal flow path 242 that pass through the respective reservoirs 230, 231, and 232; and a holding unit 250 for holding the pipe 161 (a connecting pipe 370 to a connecting pipe 375 to be described later) connected to the internal flow path 240, the internal flow path 241, the internal flow path 242, and the like. Each of the internal channels 240, 241, and 242 is integrally formed with the corresponding reservoir 230, 231, and 232, and each of the internal channels 240, 241, and 242 constitutes a part of the corresponding reservoir 230, 231, and 232.

The reservoir 230, the reservoir 231, and the reservoir 232 are arranged in the lower portion of the main body of the measuring chamber 51 so as to be aligned in the left-right direction. The first reservoir 230 is located on the left side, the second reservoir 231 is located at the center, and the third reservoir 232 is located on the right side, as viewed from the front surface 51a side (direction a in fig. 4) of the main body of the metering chamber 51. As shown in fig. 5 and 6, the reservoir 230, the reservoir 231, and the reservoir 232 each have an internal space R therein, and for example, the reservoir 230, the reservoir 231, and the reservoir 232 each have a cylindrical portion 260, a cylindrical portion 261, and a cylindrical portion 262 provided in a lower portion, and a narrowed portion 270, a narrowed portion 271, and a narrowed portion 272 provided in an upper portion. The cylindrical portion 260 has a vertically long shape compared to the cylindrical portions 261 and 262.

The lower portions of the cylindrical portions 260, 261, 262 are respectively closed by a cover 280. For example, the material of the lid 280 may be the same as or different from the material of the other portions of the storage part 230, the storage part 231, and the storage part 232. The cover 280 is made of polycarbonate, ABS, or the like. The cover 280 has a protrusion 290 having a flat lower end at the center of the lower portion. When the lid 280 is bonded to the main body of the measuring chamber 51, the protrusion 290 can be used as a handle, which facilitates the bonding operation.

For example, as shown in fig. 7 to 10, the narrow portion 270, the narrow portion 271, and the narrow portion 272 are formed in a rectangular parallelepiped shape that is thin in a direction (a direction) perpendicular to the front surface 51a of the main body of the measuring chamber 51. The narrow portions 270, 271, 272 have a smaller size in the direction a perpendicular to the front surface 51a of the main body of the metering chamber 51 and a smaller volume than the reservoir 230, 231, 232.

As shown in fig. 6 and 7, the internal flow path 240 of the first reservoir 230 is communicated from the narrow portion 270 of the upper portion of the first reservoir 230 to the lower portion of the internal space R of the first reservoir 230 through the internal space R. The internal flow path 240 is linearly provided along the inner wall 230a of the first reservoir 230 along the vertical direction (a direction) and the vertical direction of the front surface 51a of the main body. A part of the outer peripheral surface 240a of the internal flow path 240 constitutes a part of the inner wall 230a of the first reservoir 230. That is, the internal flow path 240 constitutes a part of the first reservoir 230. The internal flow path 240 has an opening 300, and the opening 300 opens at a narrow portion 270 located above the first reservoir 230. The opening 300 opens in a direction (direction a) perpendicular to the front surface 51a of the measurement chamber body at the front surface 51 a. Therefore, the internal flow path 240 extends from the opening 300 to the internal space R of the first reservoir 230 so as to extend first in the a direction and then downward.

As shown in fig. 6 and 8, a vent 310 for communicating with the internal space R is formed in the narrow portion 270 of the first reservoir 230. The vent 310 opens in a direction (direction a) perpendicular to the front surface 51a of the metering chamber body.

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

As shown in fig. 6 and 9, the internal flow path 241 of the second storage unit 231 passes through the internal space R of the second storage unit 231 from the narrow portion 271 of the upper portion of the second storage unit 231 and communicates with the lower portion of the internal space R. The internal flow path 241 is linearly provided along the inner wall 231a of the second storage section 231 in the vertical direction (a direction) and the up-down direction of the front surface 51a of the main body. A part of the outer peripheral surface 241a of the internal flow path 241 constitutes a part of the inner wall 231a of the second reservoir 231. That is, the internal flow path 241 constitutes a part of the second reservoir 231. The internal flow path 241 has an opening 320, and the opening 320 opens at the upper portion of the second storage section 231. The opening 320 is provided near the lower portion of the narrow portion 271. The opening 320 opens in the direction (direction a) perpendicular to the front surface 51a of the measurement chamber body at the front surface 51 a. Therefore, the internal flow path 241 extends from the opening 320 to the internal space R of the second storage unit 231 in the a direction and then downward.

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

As shown in fig. 6, the narrow portion 272 of the third reservoir 232 is formed longer in the vertical direction than the narrow portion 270 of the first reservoir 230, and has a larger volume.

As shown in fig. 6 and 9, the internal flow path 242 of the third reservoir 232 is communicated from the narrow portion 272 at the upper portion of the third reservoir 232 through the internal space R of the third reservoir 232 to the lower portion of the internal space R. The internal flow path 242 is linearly provided along the inner wall 232a of the third reservoir 232 in the vertical direction (a direction) and the up-down direction of the front surface 51a of the main body. A part of the outer peripheral surface 242a of the internal flow path 242 constitutes a part of the inner wall 232a of the third reservoir 232. That is, the internal flow path 242 constitutes a part of the third reservoir 232. The internal flow path 242 has an opening 340, and the opening 340 opens at the upper portion of the third reservoir 232. The opening 340 is provided near a lower portion of the narrow portion 272. The opening 340 opens in the direction (direction a) perpendicular to the front surface 51a of the measurement chamber body at the front surface 51 a. Therefore, the internal flow path 242 extends from the opening 340 to the internal space R of the third reservoir 232 so as to extend first in the a direction and then downward.

As shown in fig. 6 and 10, a vent 350 for communicating with the internal space R is formed in the narrow portion 272 of the third reservoir 232. The vent 350 opens in a direction (direction a) perpendicular to the front surface 51a of the metering chamber body. The vent 350 is disposed at an upper end of the narrowed portion 272.

As shown in fig. 4 and 5, the holding portion 250 is provided in a region above the reservoir 230, the reservoir 231, and the reservoir 232 in the front surface 51a of the main body of the metering chamber 51. For example, the holding portion 250 holds the tube 161 so that the connection tube 370, the connection tube 371, the connection tube 372, and the connection tube 375 (the tube 161) connected to the opening 300, the opening 320, the opening 340, and the vent 310 are guided to both ends of the upper portion of the main body of the measuring chamber 51. For example, the holding portion 250 includes a member capable of holding the tube 161 from both sides, a member capable of holding the tube 161 from one side, a member capable of pressing both sides or one side of the tube 161, a groove, and the like. The holding portion 250 includes a base portion, a groove portion, and an inclined portion that can change the height of the front surface 51a of the measurement chamber 51 in which the tube 161 is disposed, and the holding portion 250 can hold the tube 161 in a state in which the tube 161 is disposed in a three-dimensional manner.

For example, the holding portion 250 includes five holding members, i.e., a holding member 360 to a holding member 364, and holds the tube 161 so that the tube 161 faces the outside in the same plane as the front surface 51a of the metering chamber body. For example, the holding members 360 to 362 are provided in this order from the bottom to the top in the left end portion of the upper portion of the measurement chamber 51, and the holding members 360 to 362 hold the tube 161 so that the tube 161 faces the left outside in the horizontal direction. The holding members 363 and 364 are provided in this order from the bottom to the top in the right end portion of the upper portion of the measuring chamber 51, and the holding members 363 and 364 hold the tube 161 so that the tube 161 faces the right outside in the horizontal direction.

As shown in fig. 5, a connection pipe 370 is connected to the vent 310 of the first reservoir 230. The connection pipe 370 is held to the holding member 360. The connection pipe 370 constitutes a part of the branch pipe 161 having an open end of the waste liquid flow path 130 in the plate 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 constitutes a part of the tube 161 of the waste liquid channel 130 in the plate circuit 40. Thus, the dialysate discarded from the blood purifier 70 can be supplied and discharged to the opening 300 through the connection tube 371, and then, the dialysate can be supplied and discharged to the lower portion of the internal space R of the first reservoir 230 through the internal flow path 240 from the opening 300. Therefore, the first reservoir unit 230 can function as a metering unit that temporarily stores the dialysate discarded from the blood purifier 70 and meters the dialysate.

The connection tube 372 is connected to the opening 320 of the second storage section 231. The connection tube 372 branches in the middle, one branch being held by the holding member 362 and the other branch being held by the holding member 363. The connection tube 372 constitutes a part of the tube 161 of the dialysate supply channel 121 in the plate circuit 40. Thus, the dialysate supplied to the blood purifier 70 can be supplied and discharged to the opening 320 through the connection tube 372, and then, the dialysate can be supplied and discharged from the opening 320 to the lower portion of the internal space R of the second reservoir 231 through the internal flow path 241. Therefore, the second reservoir 231 can function as a metering unit that temporarily stores the dialysate supplied to the blood purifier 70 and meters the dialysate.

A connection pipe 373 having an open end is connected to the air vent 330 of the second reservoir 231. A connection tube 374 having an open end 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 to the holding member 364. The connection tube 375 is connected to the tube 161 of the fluid replacement flow path 141 in the plate circuit 40. Thus, the replacement fluid supplied to the blood circuit 71 can be supplied and discharged to the opening 340 through the connection tube 375, and then the replacement fluid can be supplied and discharged from the opening 340 to the lower portion of the internal space R of the third reservoir 232 through the internal channel 242. Therefore, the third reservoir 232 can function as a measuring unit that temporarily stores the replacement fluid supplied to the blood circuit 71 and measures the replacement fluid.

The measurement chamber 51 is measured by the measurement device 32, and the measurement chamber 51 measures the total weight of the supply amount of the dialysate to the blood purifier 70, the waste liquid amount of the dialysate discarded from the blood purifier 70, and the amount of the replacement liquid supplied to the blood circuit 71, whereby the change in the total weight, that is, the change in the amount of water removed by the patient can be grasped.

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

Further, as shown in fig. 11, a tube fixing portion 400 is provided on the back surface 51b of the main body of the metering chamber 51, and the tube fixing portion 400 can allow a band for binding the tube 161 to pass therethrough. The pipe fixing portion 400 is, for example, substantially inverted U-shaped, and is provided upright on the back surface 51b in an arch shape. Thus, for example, as shown in fig. 12, the tube 161 can be bound with the band 401 by passing the band 401 through the tube fixing portion 400. Thus, the metering chamber 51 can collectively hold the long tube 160 extending from the metering chamber 51.

With the present embodiment, the metering chamber 51 has: a storage section 230, a storage section 231, and a storage section 232; and an internal flow path 240, an internal flow path 241, and an internal flow path 242 which are communicated from the upper portions of the reservoir 230, the reservoir 231, and the reservoir 232 to the lower portion of the internal space R through the internal spaces R of the reservoir 230, the reservoir 231, and the reservoir 232, so that it is not necessary to dispose a flow path outside the reservoir of the main body of the measuring chamber 51, and the measuring chamber 51 can be downsized. Further, since the internal passages 240, 241, 242 are formed inside the reservoir 230, 231, 232, the sealing portion for preventing liquid leakage of the entire metering chamber 51 can be reduced, and as a result, the risk of liquid leakage can be reduced.

Since the reservoir 230, the reservoir 231, the reservoir 232, the internal flow path 240, the internal flow path 241, and the internal flow path 242 are not separately manufactured and then connected, but are integrally formed at the same time, it is not necessary to perform a separate process for connecting them, and manufacturing can be efficiently performed.

The internal passages 240, 241, 242 are provided along the inner walls of the reservoirs 230, 231, 232, and therefore, the internal passages 240, 241, 242 can be easily molded.

The reservoir 230, the reservoir 231, the reservoir 232, the internal flow path 240, the internal flow path 241, and the internal flow path 242 can be formed by, for example, injection molding, and therefore, the dimensional accuracy is high, and the difference between the individual units is small, and therefore, the difference in the water removal amount measurement error is small.

The internal flow paths 240, 241, 242 have the openings 300, 320, 340 that open toward the front surface 51a of the measuring chamber 51 at the upper portions of the reservoir 230, 231, 232, and therefore the connection pipe 161 can be appropriately connected.

The metering chamber 51 has a holding portion 250 for holding the tube 161 connected at the opening portion 300, the opening portion 320, the opening portion 340, and the vent 310, and therefore, the tube 161 connected at the opening portion 300, the opening portion 320, the opening portion 340, and the vent 310 can be positioned at the metering chamber 51, and for example, the tube can be prevented from being blocked by receiving an external force during transportation.

The main body of the measuring chamber is formed in a plate shape in which the reservoir 230, the reservoir 231, and the reservoir 232 are built, and the holding portion 250 includes holding members 360 to 364 which are positioned at the edge of the measuring chamber 51 and hold the tube 161 so that the tube 161 faces the outside in the same plane as the front surface 51a of the main body of the measuring chamber 51. This allows the tube 161 to protrude from the same surface as the front surface 51a of the measurement chamber 51 to the outside, and therefore, the measurement chamber 51 can be easily handled.

Since the vent 310, the vent 330, and the vent 350 are provided above the reservoir 230, the reservoir 231, and the reservoir 232, respectively, the supply and discharge of the liquid to and from the internal flow paths 240, 241, and 242 of the reservoirs 230, 231, and 232 can be appropriately performed.

The upper portions of the reservoir 230, the reservoir 231, and the reservoir 232 are provided with a narrowed portion 270, a narrowed portion 271, and a narrowed portion 272 that are narrower than the cylindrical portions 260, 261, and 262 in the internal space R of the reservoir 230, the reservoir 231, and the reservoir 232, and the vent 310, the vent 330, and the vent 350 are provided in the narrowed portion 270, the narrowed portion 271, and the narrowed portion 272. This can prevent the liquid in reservoir 230, reservoir 231, and reservoir 232 from flowing out through vent 310, vent 330, and vent 350. Further, since the narrowed portion 270, the narrowed portion 271, and the narrowed portion 272 are thinner in the thickness direction (a direction) than the cylindrical portion 260, the cylindrical portion 262, and the cylindrical portion 263, the entire thickness of the metering chamber 51 in a state in which the tubes are connected to the vent 310, the vent 330, and the vent 350 can be made thinner. Further, the area of the front surface 51a of the metering chamber 51 where the holding portion 250 and the tube are disposed can be widened.

The preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above embodiments. It is obvious that a person skilled in the art can conceive various modifications and variations within the scope of the idea described in the claims, and it is needless to say that these modifications and variations also fall within the technical scope of the present invention.

For example, the configuration of the metering chamber 51 is not limited to the contents of the above-described embodiment. For example, the shape, arrangement, and number of the reservoir portions of the metering chamber 51 are not limited to those of the above embodiments. For example, the storage units 230, 231, and 232 may be openable and closable by the lid 280 without a narrow portion.

The shapes, arrangements, and numbers of the internal flow paths 240, 241, and 242 are not limited to those of the above embodiments. For example, the internal flow path may not be provided along the inner wall of the reservoir, and the internal flow path may pass through the center of the reservoir. Further, a plurality of internal flow paths may be provided for each storage unit. The number and arrangement of the openings 300, 320, 340, 310, 330, 350 are not limited to those of the above embodiments.

The holding portion 250 may have another structure, and the metering chamber 51 may not have the holding portion. The method of arranging the pipes by the holding part 250 is not limited to the above embodiment. The measurement chamber 51 may have the connection pipes 370 to 375 as liquid flow paths.

The configuration of the blood purification apparatus 1 and the plate circuit 40 having the measurement chamber 51 is not limited to the above-described embodiment. For example, although the blood purification apparatus 1 according to the above-described embodiment is used for dialysis treatment, the present invention can also be applied to a blood purification apparatus that performs plasma exchange treatment, leukocyte removal treatment, continuous slow blood filtration treatment, or the like, or other types of extracorporeal circulation apparatuses.

Industrial applicability

The utility model discloses be wanting to reduce the weeping risk of extracorporeal circulation device's measurement cavity to it is effectual when wanting to improve manufacturing efficiency.

Claims (16)

1. A metering chamber connected to a liquid flow path of an extracorporeal circulation apparatus for metering a liquid flowing in the liquid flow path,

the metering chamber has:

a storage section for storing a liquid; and

an internal flow path which passes through the internal space of the storage section from the upper portion of the storage section and communicates with the lower portion of the internal space,

the reservoir and the internal flow path are integrally formed.

2. The metering chamber of claim 1,

the internal flow path constitutes a part of an inner wall of the reservoir.

3. The metering chamber of claim 1,

the internal flow path has an opening that opens to the front of the main body of the metering chamber at the upper portion of the reservoir, and a tube is connected to the opening.

4. The metering chamber of claim 2,

the internal flow path has an opening that opens to the front of the main body of the metering chamber at the upper portion of the reservoir, and a tube is connected to the opening.

5. The metering chamber of claim 3,

the metering chamber also has a holding portion for holding a tube connected to the opening portion.

6. The metering chamber of claim 4,

the metering chamber also has a holding portion for holding a tube connected to the opening portion.

7. The metering chamber of claim 5,

the main body of the metering chamber is formed in a plate shape having the reservoir portion built therein,

the holding portion includes a holding member at an edge portion of the metering chamber, and the holding member holds the tube so that the tube faces an outer side in a same plane as a front surface of the main body of the metering chamber.

8. The metering chamber of claim 6,

the main body of the metering chamber is formed in a plate shape having the reservoir portion built therein,

the holding portion includes a holding member at an edge portion of the metering chamber, and the holding member holds the tube so that the tube faces an outer side in a same plane as a front surface of the main body of the metering chamber.

9. The metering chamber of any one of claims 1 to 8,

an air vent is provided at the upper part of the storage part.

10. The metering chamber of claim 9,

a narrow part which is narrower than other parts of the inner space of the storage part is arranged at the upper part of the storage part,

the vent is disposed in the narrowed portion.

11. The metering chamber of any one of claims 1 to 8,

the plurality of storage sections are arranged in the left-right direction.

12. The metering chamber of claim 9,

the plurality of storage sections are arranged in the left-right direction.

13. The metering chamber of claim 10,

the plurality of storage sections are arranged in the left-right direction.

14. A flow path holding device which is detachably attached to a main body of an extracorporeal circulation device and which can hold at least a part of a liquid flow path of the extracorporeal circulation device, characterized in that,

the flow path retaining device has a metering chamber as claimed in any one of claims 1 to 13.

15. The flow path retaining device according to claim 14,

the flow path holding device further includes:

a heating plate having a liquid flow path through which a liquid flows, the heating plate heating the liquid flowing through the liquid flow path; and

a frame body having an opening at the center thereof, the heating plate being disposed at the opening,

the metering chamber is disposed below the frame.

16. An extracorporeal circulation device, characterized in that,

the extracorporeal circulation apparatus having the flow path maintaining apparatus according to claim 14 or 15.

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