Pump tube set and tube holder

Abstract

To provide a liquid bag set capable of forming a blood treatment circuit and accurately measuring a liquid flowing during treatment.SOLUTION: A liquid bag set 500 includes bags 212, 231 (240) for storing a liquid, and a tube that has one end connected to each of the bags and forms lines 211, 230 for supplying the liquid to or discharging the liquid from the bags. Each of the tubes has a measured portion A, which is measured by a weight sensor of a blood treatment device 400, and a non-measured portion B, which is not measured by the weight sensor.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a fluid bag set, a pump tube set, and a tube holder used in a blood processing circuit such as renal replacement therapy, simple plasma exchange therapy, and double filtration plasma exchange therapy. [Background technology]

[0002] As a treatment for patients who have developed renal disorders, there is a blood processing method called Renal Replacement Therapy (RRT). RRT includes Continuous Renal Replacement Therapy (CRRT) and Intermittent Renal Replacement Therapy (IRRT). For example, in CRRT, blood removed from the patient's body is passed through a filter (continuous slow hemofilter) and dialysis and filtration are performed to remove water from the blood, adjust electrolytes, remove waste products, and the like over a long period of time. An example of a blood processing device used for RRT including CRRT is disclosed in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-27205 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to perform RRT treatment appropriately, it is desired to measure the amount of dialysis fluid and / or replacement fluid used and the amount of drained fluid after filtration more accurately. In addition, to measure these fluids, a measurement sensor provided in the blood treatment device and a plurality of bags that store the dialysis fluid and the like and are suspended from the measurement sensor are used, and it is desired to provide such a measurement system at an inexpensive price. Furthermore, the blood treatment device is provided with a pump that presses a plurality of tubes filled with each fluid to pass the fluid through the tubes, and it is desired to improve convenience so that the tubes can be easily and accurately attached to the pump.

[0005] Therefore, the present disclosure aims to provide a liquid bag set, pump tube set, and tube holder that constitute a blood processing circuit for blood purification therapy such as RRT, simple plasma exchange (PE), or double filtration plasma exchange (DEPP), which solves at least one of the above problems, and which can accurately measure the liquid flowing during treatment, a liquid bag set that enables a measuring system to be provided at a low price, or a pump tube set or tube holder that can improve convenience when attaching the tube. [Means for solving the problem]

[0006] The liquid bag set of the first disclosure is a liquid bag set that is used in a blood processing circuit to store liquid flowing through the circuit and is weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and comprises a bag for storing liquid and a tube connected at one end to the bag for supplying liquid to the bag or discharging liquid from the bag, the tube having a weighing portion that is weighed by the weight sensor and a non-weighing portion that is not weighed by the weight sensor.

[0007] This makes it possible to realize a fluid bag set that can accurately measure the fluid flowing during treatment. In other words, the bags that store each fluid for measurement are connected to tubes through which the fluid flows, and if the tubes are included in the measurement, the amount of fluid used or drained cannot be accurately measured. In contrast, by using the above configuration, the part of the tube that is to be measured is fixedly specified, making it possible to more accurately measure the amount of fluid.

[0008] The liquid bag set of the second disclosure is a liquid bag set that is used in a blood processing circuit to store liquid flowing through the circuit and is weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and includes a plurality of bags for storing liquid, and a holder that is constructed separately from the plurality of bags, supports the plurality of bags, and is attached to the blood processing device so that it is weighed by the weight sensor together with the plurality of bags.

[0009] This allows for the realization of a liquid bag set that allows the weighing system to be provided at a low price. That is, the bag that stores the liquid is generally made of synthetic resin, and it is preferable to use a hard resin with high shape stability for accurate weighing, but on the other hand, a bag made of soft resin can be manufactured at a low cost. Therefore, by adopting the above-mentioned configuration, the bag and the holder can be made of materials suitable for each, and accurate weighing and low cost can be achieved at the same time. In addition, since one holder can support multiple bags, they can be set in the device in a unified state, which improves the workability during setting. Furthermore, when multiple bags are directly set in the device, there is a possibility that the bags will be set in the wrong place, but since multiple bags can be supported in the holder in advance and then set in the device, the wrong setting can be prevented.

[0010] Furthermore, the liquid bag set of the third disclosure may be configured as the liquid bag set of the second disclosure, wherein the holder has a flat panel and a support arm extending from the panel, and the multiple bags have through holes through which the support arm is inserted.

[0011] This allows the bag to be easily supported by the holder, and an easy-to-handle liquid bag set can be realized.

[0012] The liquid bag set of the fourth disclosure is a liquid bag set used in a blood processing circuit to store liquid flowing through the circuit and to be weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and comprises a plurality of bags for storing liquid, and a holder that supports the plurality of bags and is attached to the blood processing device so that the plurality of bags are weighed by the weight sensor together with the plurality of bags, and the plurality of bags include a first bag for storing dialysis fluid or replacement fluid, and a second bag for storing drainage from a filter provided in the blood processing circuit, and the first bag is positioned vertically below the second bag.

[0013] As a result, when a large-capacity storage bag is hung on an IV stand or the like and treatment liquid is supplied from it to the first bag, the first bag is located below, so the treatment liquid can be sent quickly by utilizing the differential pressure, eliminating the need for a separate pump or the like and allowing processes such as priming to be completed quickly.

[0014] The liquid bag set of the fifth disclosure is a liquid bag set that is used in a blood processing circuit to store liquid flowing through the circuit and is weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and comprises a lower bag for storing liquid and a lower tube extending from the lower bag, an upper bag for storing liquid and an upper tube extending from the upper bag, the lower tube extending in one left-right direction and the upper tube extending in the other left-right direction.

[0015] This prevents the tubes extending from each bag from getting close to each other and becoming tangled, and improves visibility of which tube is connected to which bag during blood processing. Also, since the tubes extending from each bag are spaced apart from each other, the operability of the valves can be improved when valves are provided on each tube.

[0016] A liquid bag set according to a sixth disclosure is a liquid bag set used in a blood processing circuit to store liquid flowing through the circuit and to be weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and includes a lower bag for storing liquid, a lower tube connection part provided on the lower bag, and a lower tube extending from the lower tube connection part, an upper bag for storing liquid, an upper tube connection part provided on the upper bag, and an upper tube extending from the upper tube connection part. The lower tube connection portion is biased to one side in the left-right direction relative to the lower bag, the lower tube extends from the lower tube connection portion to the other side in the left-right direction, and a supported portion supported by the blood processing device is provided midway along the lower tube, and the upper tube connection portion is biased to the other side in the left-right direction relative to the upper bag, the upper tube extends from the upper tube connection portion to one side in the left-right direction, and a supported portion supported by the blood processing device is provided midway along the upper tube.

[0017] This allows the length of the tube arranged from the tube connection part to the supported part on its side to be relatively large, so that even if an unintended external force is applied to the tube, the long tube can absorb the force by deforming, thereby suppressing the effect of the external force on the weight measurement of the bag.

[0018] The liquid bag set of the seventh disclosure is a liquid bag set that is used in a blood processing circuit to store liquid flowing through the circuit and is weighed by a weight sensor of a blood processing device that controls blood processing by the circuit, and comprises a bag for storing liquid, a holder that supports the bag and is weighed by the weight sensor together with the bag when attached to the blood processing device, and a tube extending from the bag, and the holder has a notch in the portion that overlaps with the tube when viewed from the front when attached to the blood processing device.

[0019] This makes it possible to prevent contact between the holder and the tube, and therefore makes it possible to prevent the tube from interfering with the holder due to a change in the tube's position, etc., and thus to prevent the weight measurement from being affected.

[0020] The pump tube set of the eighth disclosure is a pump tube set comprising a plurality of tubes attached to each of a plurality of pumps of a blood processing device, and a tube holder supporting the plurality of tubes, wherein the tube holder has a structure such that it can be attached to a holder mounting portion of the blood processing device in a first position, but cannot be attached to the holder mounting portion in a second position other than the first position.

[0021] This makes it possible to realize a pump tube set that can improve the convenience of tube attachment. That is, by supporting a plurality of tubes together with the tube holder, the entire pump tube set can be easily handled and made compact. Furthermore, with the above-mentioned configuration, it is possible to realize a pump tube set that can prevent a situation in which the user attaches each tube to a wrong pump part by urging attachment in the correct first position since attachment in the incorrect second position is not possible.

[0022] The pump tube set of the ninth disclosure is a pump tube set comprising a plurality of tubes attached to each of a plurality of pumps possessed by a blood processing device, and a tube holder supporting the plurality of tubes, wherein a joint is provided on each end of the tubes, and the tube holder is disposed between the two joints.

[0023] The tube holder of the tenth disclosure is a tube holder that supports a plurality of tubes to be attached to each of a plurality of pumps of a blood processing device, the tube holder having a long, plate-shaped holder body, in which three insertion holes, through which three tubes arranged in parallel as the plurality of tubes are individually inserted, are formed in a line along a long side of the holder body, and in the holder body, a plate-shaped rib extending in a direction intersecting the main surface of the holder body is provided between a central insertion hole of the three insertion holes and the long side of the holder body.

[0024] This allows the width of the long, plate-shaped holder body to be reduced, making the pump tube set more compact, and by providing ribs in areas where the strength is weaker than other areas due to the formation of insertion holes, the strength of those areas can be improved. In particular, since the central area of ​​the holder body in the longitudinal direction is more susceptible to load than the ends, providing ribs in this area is effective in improving strength.

[0025] Furthermore, the tube holder of the eleventh disclosure is the tube holder of the tenth disclosure, wherein the tube holder is configured to be attached to a holder attachment portion provided on the blood processing device, and the rib may form a pressure-receiving portion that receives pressure from an operator's fingers when attaching the tube holder to the holder attachment portion.

[0026] In this way, the ribs on the holder body not only improve the strength of the holder body, but also serve as pressure-receiving parts that are pressed by fingertips when attaching the holder to the holder attachment part. Furthermore, if a fitting shape corresponding to the ribs is provided on the holder attachment part of the blood processing device, the ribs can also fulfill a positioning function when attaching the tube holder.

[0027] Furthermore, the tube holder according to the twelfth disclosure may be the tube holder according to the tenth disclosure, wherein the tube holder is configured to be mounted on a holder mounting portion provided on the blood processing device, and the holder main body may be provided with a recess that forms a moderation mechanism together with a movable convex portion provided on the blood processing device and biased in a direction approaching the holder main body when mounted on the holder mounting portion, facing the movable convex portion.

[0028] The blood processing device can be used in a variety of applications, including a blood processing system, a blood processing method, and a blood processing apparatus. Effect of the Invention

[0029] The liquid bag set, pump tube set, or tube holder constituting the blood processing circuit of the present disclosure can realize a liquid bag set that can accurately measure the liquid flowing during treatment, a liquid bag set that enables a metering system to be provided at a low cost, and a pump tube set or tube holder that can improve convenience when attaching the tube. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a schematic diagram showing the overall configuration of a blood treatment circuit for RRT including a liquid bag set and a pump tube set according to the first embodiment. [Diagram 2] FIG. 2 is a front view of the fluid bag set. [Diagram 3] FIG. 3 is a perspective view of a fluid bag set. [Figure 4] FIG. 4 is an exploded perspective view of the fluid bag set. [Diagram 5] FIG. 5 is a front view of the holder. [Figure 6] 6 is a partial side view of the holder of FIG. 5 taken along line VI-VI. [Figure 7] FIG. 7 is a front view and a side view of the tube holder. [Figure 8] FIG. 8 is a perspective view of the pump tube set. [Figure 9] FIG. 9 is a perspective view showing a state in which a pump tube set is attached to a pump tube. [Figure 10] FIG. 10 is a schematic diagram showing the overall configuration of a blood treatment circuit for RRT including a fluid bag set and a pump tube set according to the second embodiment. [Figure 11] FIG. 11 is a schematic diagram showing the configuration when the filter in the circuit of FIG. 10 is turned upside down (upside down). [Figure 12] FIG. 12 is a diagram showing the processing liquid set in an expanded state. [Figure 13] FIG. 13 is a diagram showing a state in which the tubes in the treatment liquid set of FIG. 12 are bundled. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] (Embodiment 1) [1. Overall configuration of blood processing circuit for RRT] The present invention can be applied to a liquid bag set, a pump tube set, and a tube holder used in a blood processing circuit for blood purification therapy such as renal replacement therapy (RRT), simple plasma exchange therapy (PE), or double filtration plasma exchange therapy (DEPP). An embodiment of the present invention will be described below by taking a blood circuit for RRT as an example. FIG. 1 is a schematic diagram showing the overall configuration of a blood processing circuit for RRT, and illustrates a blood processing circuit 1 used for HDF (hemodiafiltration) as an example. This blood processing circuit 1 is generally composed of three sets: a blood set 100 on the right side of the figure, a processing liquid set 200 on the left side, and a heating set 300 in the center.

[0032] [1-1. Blood set] The blood set 100 mainly comprises a blood removal line 101, a filter 102, and a blood return line 103. The blood removal line 101 has a flexible tube and connects the patient's blood vessel to the filter 102. A blood pump 110 is provided in the blood removal line 101, and when the blood pump 110 is operated, the patient's blood is sent to the filter 102 through the blood removal line 101.

[0033] A saline line 111 joins the blood removal line 101 at a portion upstream of the blood pump 110 (patient side portion). A bag 112 containing physiological saline is connected to the saline line 111, and physiological saline is supplied to the blood removal line 101 during priming. A drug line 113 joins the blood removal line 101 at a portion upstream of the blood pump 101 and downstream of the joining point of the saline line 111 (filter side portion). A syringe 114 containing a drug such as an anticoagulant is connected to the drug line 113, and the anticoagulant is injected through the drug line 113 into the blood passing through the blood removal line 101.

[0034] An arterial pressure chamber 115 consisting of a drip chamber is interposed in the blood removal line 101 downstream of the blood pump 110. The pressure of the blood in the blood removal line 101 can be measured by connecting a pressure monitor (not shown) to a pressure measurement line 701 extending from this arterial pressure chamber 115 via a patient protection filter 701A consisting of a hydrophobic filter. In addition, a pre-dilution line 116 extends from the arterial pressure chamber 115, and by connecting a bag containing a replacement fluid such as an electrolyte solution to this line, the blood passing through the blood removal line 101 can be pre-diluted with the replacement fluid.

[0035] The filter 102 includes a cylindrical case 120 and a filter 121 housed in the case 120. The filter 121 is configured, for example, by bundling a plurality of hollow fibers. The case 120 includes a blood inlet port 122 provided at one end, a blood outlet port 123 provided at the other end, a dialysate port 124 provided at the periphery near the one end, and a drainage port 125 provided at the periphery near the other end. The downstream end of the blood removal line 101 is connected to the blood inlet port 122.

[0036] The upstream end of the blood return line 103 is connected to the blood outlet port 123 of the case 120. The blood return line 103 has a flexible tube and connects between the filter 102 and the patient's blood vessel. A mixing chamber 130 is interposed in the middle of the blood return line 103, and replacement fluid sent from a treatment liquid set 200 (described later) can be supplied to the returned blood in this mixing chamber 130. A pressure measurement line 702 extends from the mixing chamber 130 and is connected to a pressure monitor (not shown) via a patient protection filter 702A.

[0037] [1-2. Processing solution set] The treatment fluid set 200 mainly includes a supply fluid line 201, a pump unit 202, and a drainage line 203. The supply fluid line 201 includes a storage bag 210 for storing a liquid common to the dialysis fluid and replacement fluid, a common line 211 having one end connected to the storage bag 210, and a first fluid bag 212 for measurement connected to the other end of the common line 211 and for temporarily storing the liquid. As will be described in detail later, the first fluid bag 212 constitutes a bag according to the present invention whose weight is measured by a weight sensor provided in the blood treatment device 400.

[0038] The supply fluid line 201 further includes a dialysate line 213 and a post-replacement fluid line 214. That is, the common line 211 is branched at two points, and the dialysate line 213 and the post-replacement fluid line 214 extend from each branch. Of these, the post-replacement fluid line 214 branches off from a position closer to the first fluid bag 212 along the common line 211 than the dialysate line 213.

[0039] Drainage line 203 has collection line 230, one end of which is connected to drainage port 125 of filter 102, and a second liquid bag 231 for measurement, which is connected to the other end of collection line 230 and temporarily stores the drainage. Drainage line 203 further has waste line 232 extending from a branch midway through collection line 230, and tank 233 disposed at the downstream end of waste line 232. Among these, second liquid bag 231, together with first liquid bag 212 described above, constitutes a bag according to the present invention whose weight is measured by a weight sensor provided in blood processing device 400.

[0040] Each of the lines 201, 203 (including the lines 211, 213, 214, 230, 232 that constitute these lines) of the treatment liquid set 200 is made of a flexible tube. A pressure measurement line 703 extends from the middle of the recovery line 230 and is connected to a pressure monitor (not shown) via a patient protection filter 703A.

[0041] The pump unit 202 includes, for example, three finger pumps 221 to 223, which are arranged vertically on the side of the blood processing apparatus 400. A middle part (pressurized part 601a: see FIG. 8) of the post-fluid replacement line 214 is set to the finger pump 221 located at the upper side, a middle part (pressurized part 601a: see FIG. 8) of the dialysis fluid line 213 is set to the finger pump 222 located at the center, and a middle part (pressurized part 601a: see FIG. 8) of the recovery line 230 is set to the finger pump 223 located at the lower side. When the lines 213, 214, and 230 are set in the pump unit 202, a tube holder 224 that integrally supports the lines 213, 214, and 230 is used to improve the convenience of the work. The tube holder 224 will be described in detail later.

[0042] [1-3. Heating set] The heating set 300 includes a dialysate heating line 301 and a post-replacement fluid heating line 302. The upstream end of the dialysate heating line 301 is connected to the downstream end of the dialysate line 213, and the downstream end of the dialysate heating line 301 is connected to the dialysate port 124 of the filter 102. The upstream end of the post-replacement fluid heating line 302 is connected to the downstream end of the post-replacement fluid line 214, and the downstream end of the post-replacement fluid heating line 302 is connected to the mixing chamber 130.

[0043] The heating set 300 further includes a dialysis fluid heater 303 and a post-replacement fluid heater 304. These heaters 303, 304 are provided in the blood processing device 400 and generate heat according to the supplied power. Therefore, the dialysis fluid heater 303 heats the dialysis fluid flowing through the dialysis fluid heating line 301, and the post-replacement fluid heater 304 heats the replacement fluid flowing through the post-replacement fluid heating line 302.

[0044] [1-4. Operation of the blood processing circuit] The blood treatment circuit 1 generally operates as follows. That is, when the blood pump 110 is driven in the blood set 100, blood drawn from the patient is sent along the blood withdrawal line 101 to the filter 102 while a replacement fluid, an anticoagulant, and the like are being injected. The blood sent to the filter 102 is filtered by the filter 121, and the resulting drainage fluid is collected in a tank 233 through the drainage line 203 of the treatment fluid set 200. Meanwhile, some components in the blood sent to the filter 102 diffuse into the dialysis fluid supplied from the treatment fluid set 200 through the dialysis fluid port 124, and this is also collected in the tank 233 through the drainage line 203 of the treatment fluid set 200. Then, the blood that has been filtered and diffused in the filter 102 is returned to the patient through the blood return line 103 while a replacement fluid is supplied in the mixing chamber 130 along the way.

[0045] In this blood processing circuit 1, the liquid in the storage bag 210 is temporarily stored in the first liquid bag 212 and then supplied to the filter 102 or the mixing chamber 130. The liquid stored in the first liquid bag 212 is weighed by a weight sensor provided in the blood processing device 400, thereby measuring the amount of supply. The drained liquid collected from the filter 102 is also temporarily stored in the second liquid bag 231 and then discarded in the tank 233. The drained liquid stored in the second liquid bag 231 is weighed by a weight sensor provided in the blood processing device 400, thereby measuring the amount of drained liquid.

[0046] [2. Liquid bag set] The blood processing circuit 1 according to this embodiment includes a liquid bag set 500 for accurately measuring the weight of liquid stored in the first liquid bag 212 and the second liquid bag 231. This liquid bag set 500 can be used in the blood processing circuit 1 for renal replacement therapy (RRT) such as HDF described above, and is a liquid bag set that stores liquid (dialysis fluid, post-replacement fluid, drainage fluid, etc.) flowing through this blood processing circuit 1 and is weighed by a weight sensor provided in the blood processing device 400 that controls blood processing by the blood processing circuit 1. Hereinafter, this liquid bag set 500 will be described.

[0047] FIG. 2 is a front view of the liquid bag set 500, FIG. 3 is a perspective view of the liquid bag set 500, and FIG. 4 is an exploded perspective view of the liquid bag set 500. The liquid bag set 500 has a bag unit 501 and a bag holder 502 that supports the bag unit 501. Of these, the bag unit 501 has, in addition to the first liquid bag 212 and the second liquid bag 231, at least a part of the common line 211 connected to the first liquid bag 212, and at least a part of the recovery line 230 connected to the second liquid bag 231. Hereinafter, when referring to matters common to the first liquid bag 212 and the second liquid bag 231, both may be referred to as liquid bags 240.

[0048] The bag holder 502 detachably supports the bag unit 501 including each liquid bag 240. When the bag holder 502 is attached to the blood processing device 400, the weight of the bag holder 502 and the bag unit 501 are measured. To attach the bag holder 502 to the blood processing device 400, the blood processing device 400 is provided with a holder hanger 503. The configurations of the bag unit 501, the bag holder 502, and the holder hanger 503 will be described in more detail below. In the following description, the up and down (vertical up and down), left and right, and front and back directions are used when the liquid bag set 500 is attached to the blood processing device 400.

[0049] [2-1. Bag unit] The liquid bag 240 of the bag unit 501 has a bag body 241 having a liquid storage chamber 242 therein, the bag body 241 being made of two generally rectangular flexible films sealed by welding the peripheral portions of the films together or the like. A flange 243 is formed on the upper side 241u of the bag body 241, the flange 243 being wide and extending to the left and right, and through holes 244 are provided near each of the left and right ends of the flange 243. These through holes 244 are slit-shaped with a slit length D1 (see FIG. 4) whose longitudinal direction is along the left-right direction.

[0050] In the bag body 241, a tube connection part 245 that communicates between the inside and outside of the bag body 241 is provided on a lower side 241d located opposite the flange 243. The tube connection part 245 of the first liquid bag 212 is located to the right of the center in the left-right view in a front view, and the tube connection part 245 of the second liquid bag 231 is located to the left of the center in the left-right view in a front view (see FIG. 2). In addition, the lower side 241d of the bag body 241 is provided with a gentle slope that slopes downward from the side end toward the tube connection part 245, and the inner bottom surface of the storage chamber 242 also slopes downward toward the tube connection part 245 in accordance with this slope.

[0051] A common line (lower tube) 211 is connected to a tube connection part (lower tube connection part) 245 of the first liquid bag (lower bag) 212. This common line 211 has, in order from the side closest to the tube connection part 245, a first tube 250, an L-shaped joint 251, a second tube 252, an L-shaped joint 253, and a third tube 254.

[0052] Specifically, the upper end of a short first tube 250 extending in the vertical direction is connected to the tube connection part 245, and the upper end of an L-shaped joint 251 is connected to the lower end of the first tube 250. The right end of a second tube 252 extending in the horizontal direction is connected to the left end of the L-shaped joint 251, and the left end of the second tube 252 is connected to the left end of the second L-shaped joint 253. Furthermore, the upper end of a third tube 254 is connected to the lower end of the L-shaped joint 253. In this way, in the first liquid bag 212, the tube connection part 245 is located to the right side of the bag body 241, and the common line 211 (particularly the second tube 252) connected to the tube connection part 245 extends to the opposite left side. The L-shaped joints 251 and 253 are made of a synthetic resin harder than the tubes 250, 252, and 254.

[0053] A recovery line (upper tube) 230 is connected to a tube connection part (upper tube connection part) 245 of the second liquid bag (upper bag) 231. This recovery line 230 has, in order from the side closest to the tube connection part 245, a first tube 260, an L-shaped joint 261, a second tube 262, an L-shaped joint 263, and a third tube 264.

[0054] Specifically, the upper end of the first tube 260, which is short and extends in the vertical direction, is connected to the tube connection part 245, and the upper end of the L-shaped joint 261 is connected to the lower end of the first tube 260. The left end of the second tube 262, which extends in the horizontal direction, is connected to the right end of the L-shaped joint 261, and the right end of the second tube 262 is connected to the right end of the second L-shaped joint 263. Furthermore, the upper end of the third tube 264 is connected to the lower end of the L-shaped joint 263. In this way, in the second liquid bag 231, the tube connection part 245 is biased to the left side with respect to the bag body 241, and the recovery line 230 (particularly the second tube 262) connected to the tube connection part 245 extends to the opposite right side. The L-shaped joints 261 and 263 are made of a synthetic resin that is harder than the tubes 260, 262, and 264.

[0055] As can be seen from the above description and FIG. 2, in this embodiment, the first liquid bag 212 and the portion of the common line 211 adjacent to the first liquid bag 212, and the second liquid bag 231 and the portion of the recovery line 230 adjacent to the second liquid bag 231 are configured symmetrically. However, the configuration of both is not limited to this, and they may be asymmetrical with each other. Also, although the common line 211 extends to the left from the first liquid bag 212 and the recovery line 230 extends to the right from the second liquid bag 231, these common line 211 and recovery line 230 may be configured to extend in the same direction from each liquid bag 212, 231.

[0056] [2-2. Bag holder] Next, the bag holder 502 will be described with reference to the front view of FIG. 5 and the partial side view of FIG. 6. The bag holder 502 includes a flat panel 510 and a support arm 511 extending from the panel 510. The bag holder 502 includes a first holder portion 512 located on the lower side to support the first liquid bag 212 and a second holder portion 513 located on the upper side to support the second liquid bag 231, and these are integrated into one structure. Hereinafter, when matters common to the first holder portion 512 and the second holder portion 513 are mentioned, each of them may be referred to as a holder portion 520. Note that the bag holder 502 may be configured to support the first liquid bag 212 at the upper second holder portion 513 and support the second liquid bag 231 at the lower first holder portion 512, unlike the one shown in the figure.

[0057] The holder part 520 has a panel part 521 which is generally rectangular and made of a synthetic resin harder than the bag body 241 of the liquid bag 240. The specific material of the bag body 241 can be selected from, for example, PVC (polyvinyl chloride resin), EVA (ethylene-vinyl acetate copolymer resin), PE (polyethylene resin), TPU (thermoplastic polyurethane), and styrene-based elastomer. Among these, PVC is preferable in terms of compatibility with the connection between the bag body 241 and the tubes constituting the lines 211 and 230 and the price. The specific material of the holder part 520 can be selected from, for example, PET (polyethylene terephthalate), A-PET (amorphous PET), C-PET (crystallized PET), G-PET (glycol-modified PET), PS (polystyrene resin), and PP (polypropylene resin). Among these, A-PET is preferable from the viewpoints of the overall rigidity of holder portion 520, elasticity that does not break when supporting arm 511 is bent, transparency of holder portion 520, and price.

[0058] Panel portion 521 has thick portion 522 and thin portion 523, and thick portion 522 is positioned so as to surround thin portion 523 to form a frame. Therefore, panel portion 521 is ensured with sufficient rigidity to maintain a flat plate shape by thick portion 522. Meanwhile, support arms 511, which are inserted into through holes 244 of liquid bag 240, are provided near the left and right ends of the upper side of panel portion 521 so as to extend upward.

[0059] The support arm 511 has a base end 530 located on the base end side (lower side) in the extension direction (upward), and a tip end 531 located on the tip side (upper side) of the base end 530 in the extension direction. The base end 530 has a rectangular shape with rounded corners, and the tip end 531 is connected to its upper side. More specifically, the tip end 531 has a smaller width dimension in the left-right direction than the base end 530, and in the right support arm 511, the tip end 531 is connected to the upper side of the base end 530, shifted to the left, and in the left support arm 511, the tip end 531 is connected to the upper side of the base end 530, shifted to the right. Furthermore, a cutout 532 is formed in the lower end portion of the tip end 531 in the width direction (left-right direction). This cutout 532 opens outward in the left-right direction in the holder part 520. In other words, the right support arm 511 opens to the right, and the left support arm 511 opens to the left.

[0060] The lower end of the support arm 511 is connected to a thick portion 522 on the upper side of the panel portion 521, and the support arm 511 is formed to be thinner than the thick portion 522. The lower end of the support arm 511 can be bent forward relative to the panel portion 521 by the operation of a user's fingers. Therefore, when the support arm 511 is biased forward, the base end portion 530 and the tip portion 531 are bent forward integrally. The support arm 511 bent forward in this manner is inserted into the through hole 244 of the liquid bag 240, and the holder portion 520 supports the upper portion of the liquid bag 240 (see FIG. 3).

[0061] 5, the base end 530 of the support arm 511 has a width dimension D2. The tip end 531 of the support arm 511 has a maximum width dimension D3 in a portion without the notch 532, and has a minimum width dimension D4 in a portion where the notch 532 is formed. These dimensions D2, D3, and D4 have a relationship of D2>D1=D3>D4 with the slit length D1 of the through hole 244 of the liquid bag 240. Therefore, the support arm 511 can insert only the tip end 531 into the through hole 244 of the liquid bag 240, and can engage with the through hole 244 at the notch 532. However, the magnitude relationship of each dimension is not limited to this, and for example, the maximum width dimension D3 of the tip end 531 may be set to be slightly smaller than the slit length D1 of the through hole 244.

[0062] The panel portion 521 of the holder portion 520 has a panel extension portion 540 which extends further downward from a portion of its lower end, and a joint holder 541 is provided on the front surface of the panel extension portion 540. The joint holder 541 has a protruding portion 542 which protrudes forward from the panel extension portion 540, and this protruding portion 542 has a generally rectangular shape in a front view. The joint holder 541 also has a fitting groove 543 which forms a recess in relation to the protruding portion 542 and extends in an L-shape in a front view.

[0063] The fitting groove 543 of the joint holder 541 of the lower first holder part 512 opens at the left-right center of the upper surface of the rectangular protruding part 542 and at the top-bottom center of the left surface, forming an L-shaped groove (an inverted L-shape) connecting these two openings. That is, the fitting groove 543 extends downward from the left-right center of the upper surface of the protruding part 542, turns around approximately near the center of the protruding part 542, extends to the left, and reaches the opening at the top-bottom center of the left surface. The panel extension part 540 and the joint holder 541 of the first holder part 512 are provided to the right of the center in the left-right direction with respect to the panel part 521.

[0064] As shown in FIG. 3, the joint holder 541 of the first holder section 512 supports the L-shaped joint 251 connected to the first liquid bag 212 via the first tube 250 by fitting it into the fitting groove 543. As described above, the joint holder 541 is located on the right side of the panel section 521, so a space (notch) 540a is formed on the left side of the joint holder 541. This space 540a overlaps with the common line 211 (particularly the second tube 252) in a front view when the first liquid bag 212 is supported by the first holder section 512 (see FIGS. 2 and 3). This prevents the bag unit 501 and the bag holder 502 from interfering with each other in the common line 211, which would affect the measurement of weight.

[0065] The fitting groove 543 of the joint holder 541 of the upper second holder part 513 opens at the left-right center of the upper surface of the rectangular protruding part 542 and at the top-bottom center of the right surface, forming an L-shaped groove connecting these two openings. That is, the fitting groove 543 extends downward from the left-right center of the upper surface of the protruding part 542, turns approximately near the center of the protruding part 542, extends to the right, and reaches the opening at the top-bottom center of the right surface. Note that the panel extension part 540 and the joint holder 541 of the second holder part 513 are provided on the left side of the left-right center with respect to the panel part 521, opposite to the case of the first holder part 512.

[0066] As shown in FIG. 3, the joint holder 541 of the second holder section 513 supports the L-shaped joint 261 connected to the second liquid bag 231 via the first tube 260 by fitting it into the fitting groove 543. As described above, the joint holder 541 is offset to the left side with respect to the panel section 521, and therefore a space (notch) 540a is formed on the right side of the joint holder 541. This space 540a overlaps with the recovery line 230 (particularly the second tube 262) in a front view when the second liquid bag 231 is supported by the second holder section 513 (see FIGS. 2 and 3). This prevents the bag unit 501 and the bag holder 502 from interfering with each other in the recovery line 230, thereby affecting the measurement of weight.

[0067] As shown in Fig. 6, the fitting groove 543 has a groove width dimension D5 of the inside 543a that is almost constant in the depth direction of the groove, but the front opening end 543b has an opening dimension D6 that is slightly narrower than the dimension D5. This makes it possible to prevent the L-shaped joints 251, 261 from falling off after they are fitted into the fitting groove 543. Note that such a configuration in which the opening end 543b is narrower than the inside 543a may be provided over the entire length of the fitting groove 543, or may be provided only in part of it. When provided in part of it, it is preferable to provide it partially on each of the parts extending in the vertical direction and the left-right direction when the fitting groove 543 is viewed from the front.

[0068] The lower first holder part 512 and the upper second holder part 513 are connected and integrated by a panel extension part 540 of the second holder part 513. That is, the panel extension part 540 extending downward from the panel part 521 of the upper second holder part 513 has a lower end connected to an upper end of the panel part 521 of the lower first holder part 512.

[0069] Moreover, the panel parts 521 of the upper and lower holder parts 520 (the first holder part 512 and the second holder part 513) have upper supported parts 550 that protrude outward in a rectangular shape from the upper ends of the left and right side ends. The upper supported parts 550 are made of the thick part 522 of the panel part 521, and are supported by the holder hanger 503 as described later. Furthermore, the left and right parts of the lower end part of the panel part 521 of the lower first holder part 512, which are separated by the panel extension part 540, form lower supported parts 551. The lower supported parts 551 are also made of the thick part 522 of the panel part 521, and are supported by the holder hanger 503. The lower edges of the left and right lower supported parts 551 are inclined so as to head downward as they approach the center (in other words, as they approach the panel extension part 540).

[0070] As described above, the liquid bag set 500 is composed of the bag unit 501 and the bag holder 502. The bag unit 501 and the bag holder 502 are constructed separately, and the bag unit 501 is supported by the relatively hard bag holder 502, so that they are separable from each other. However, the bag unit 501 and the bag holder 502 may not be separable, and specifically, they may be constructed separately and then fixed to each other by welding or fastening to form an integrated unit.

[0071] [2-3. Holder hanger] 4, holder hanger 503 is a plate made of hard synthetic resin, and its front view shape has a contour similar to that of panel 510 (including upper and lower panel parts 521 and upper and lower panel extension parts 540) of bag holder 502. This holder hanger 503 is fixedly attached to, for example, a side wall part of blood processing device 400 by fastening means such as screws, and liquid bag set 500 is suspended from it.

[0072] More specifically, the holder hanger 503 has a flat body plate 560. This body plate 560 has a first plate 561 corresponding to the lower first holder portion 512, and a second plate 562 corresponding to the upper second holder portion 513. Furthermore, the holder hanger 503 has a lower support hook 563 and an upper support hook 564 provided on this body plate 560.

[0073] The lower first plate 561 of the main body plate 560 has a rectangular portion 561a corresponding to the panel portion 521 of the first holder portion 512, and an extension portion 561b extending downward from the rectangular portion 561a and corresponding to the panel extension portion 540 of the first holder portion 512. The extension portion 561b is connected to a position toward the right of the center of the lower end of the rectangular portion 561a. Lower support hooks 563 are provided on the left and right of the extension portion 561b at the lower end of the rectangular portion 561a, and a central support hook 564 is provided at the lower end of the extension portion 561b.

[0074] The lower support hook 563 is hook-shaped with a gap 563a that opens upward. Specifically, the lower support hook 563 has a folded-back portion 563b that is L-shaped in side view, as if a horizontally long plate extending from the lower end of the rectangular portion 561a was folded forward and then folded back upward, and the lower and front sides of the gap 563a are surrounded by this folded-back portion 563b. The first holder portion 512 is supported from below by the lower support hook 563, as the lower supported portion 551 formed at the lower end of the panel portion 521 is fitted into the gap 563a. In addition, the left and right lower support hooks 563 are inclined downward as they approach the center (in other words, as they approach the extended portion 561b). Therefore, the lower support hook 563 makes line contact with the lower edge of the lower supported portion 551 to stably support the first holder portion 512 , and prevents the lower supported portion 551 from coming off the lower support hook 563 due to its folded shape.

[0075] The central support hook 564 has a hook shape with a gap 564a that opens upward. Specifically, the central support hook 564 has a folded portion 564b that is a horizontally long plate material extending from the lower end of the extension portion 561b folded forward and then folded upward, and a folded portion 564c that is a vertically long plate material extending from the right end of the extension portion 561b folded forward and then folded back to the left. These folded portions 564b and 564c are connected to each other and form an L-shape (an inverted L-shape) in a front view, surrounding the lower, right, and front sides of the gap 564a. The first holder portion 512 is supported from below by the central support hook 564 as the panel extension portion 540 and the joint holder 541 are fitted into the gap 564a.

[0076] The upper second plate 562 of the main body plate 560 has a rectangular portion 562a corresponding to the panel portion 521 of the second holder portion 513, and an extension portion 562b extending downward from the rectangular portion 562a and corresponding to the panel extension portion 540 of the second holder portion 513. The extension portion 562b is connected to a position toward the left of the center of the lower end of the rectangular portion 562a, and its lower end is also connected to the upper end of the first plate 561. Therefore, the first plate 561 and the second plate 562 are integrally connected by the extension portion 562b.

[0077] Upper support hooks 565 are provided to protrude forward from the upper ends of the left and right side ends of the rectangular portion 561a of the first plate 561 and the upper ends of the left and right side ends of the rectangular portion 562a of the second plate 562. The upper support hooks 565 are folded back so as to extend forward from the side ends of the rectangular portions 561a and 562a and then extend upward, forming an L-shape in side view. The upper support hooks 565 support the upper supported portions 550 protruding from the side ends of the upper and lower panel portions 521 from below. The distance between the left and right upper support hooks 565 is set to be slightly larger than the left-right dimension of the corresponding panel portion 521.

[0078] 2 to 4, in blood processing apparatus 400, two joint supports 570, 571 are provided near lower first plate 561. One joint support 570 is provided near the lower left of first plate 561, and the other joint support 571 is provided near the upper right of first plate 561. These joint supports 570, 571 are provided on the side wall of blood processing apparatus 400 like holder hanger 503, and are not subject to measurement by a weight sensor provided in blood processing apparatus 400.

[0079] The two L-shaped joints 253, 263 of the bag unit 501 are supported by such joint support parts 570, 571. That is, the joint support parts 570, 571 support the common line 211 or the recovery line 230 at a position offset laterally from the tube connection parts 245 of each liquid bag 240. Note that any of the joint support parts 570, 571 may be configured to fixedly support the L-shaped joints 253, 263 to the blood processing device 400, and the specific configuration is not limited, and may include a configuration in which the L-shaped joints 253, 263 are gripped or bound with a wire.

[0080] The holder hanger 503 as described above is attached to the blood processing device 400 by fastening means such as screws passed through a plurality of through holes 566 formed in the main body plate 560. When the liquid bag set 500 is supported by the holder hanger 503 attached to the blood processing device 400, the weight of the liquid bag set 500 can be measured by a weight sensor provided in the blood processing device 400.

[0081] [2-4. Liquid bag set support mode] A description will be given of a mode in which the liquid bag set 500 (bag unit 501 and bag holder 502) is supported on the blood processing apparatus 400 via the holder hanger 503. First, the bag unit 501 is supported by the bag holder 502. At this time, each liquid bag 240 of the bag unit 501 is empty.

[0082] Specifically, each support arm 511 of the bag holder 502 is folded forward and passed through each corresponding through hole 244. That is, the tip portion 531 of the support arm 511 is passed through the through hole 244, and the left and right outer portions of the through hole 244 are clamped by the notch portion 532. At this time, since the width dimension D2 of the base end portion 530 of the support arm 511 is larger than the slit length D1 of the through hole 244, only the tip portion 531 of the support arm 511 can be passed through the through hole 244. As a result, the flange portion 243 at the upper end of the liquid bag 240 is supported in a state where it is separated forward by a predetermined dimension (the vertical dimension of the base end portion 530) from the bag holder 502. Therefore, the liquid bag 240 is not excessively compressed by the bag holder 502, and a large amount of liquid can be stored in the storage chamber 242.

[0083] Furthermore, the L-shaped joints 251, 261 closer to each liquid bag 240 in the bag unit 501 are supported by each joint holder 541 of the bag holder 502. That is, the lower L-shaped joint 251 fits into the fitting groove 543 of the joint holder 541 of the first holder part 512 and is sandwiched between the two protrusions 542. Similarly, the upper L-shaped joint 261 fits into the fitting groove 543 of the joint holder 541 of the second holder part 513 and is sandwiched between the two protrusions 542. At this time, as already described, the opening dimension D6 of the opening end 543b of each fitting groove 543 is smaller than the groove width dimension D5 of the inside 543a, so that the sandwiched L-shaped joints 251, 261 are prevented from falling off.

[0084] In this way, each liquid bag 240 is supported at three points on the bag holder 502, two points on the upper side and one point on the lower side. As can be seen from FIG. 3 and FIG. 4, for example, the vertical separation dimension between the lower support arm 511 and the joint holder 541 in the bag holder 502 is smaller than the vertical separation dimension between the through hole 244 and the L-shaped joint 251 for the lower liquid bag 240. In other words, the separation dimension between the upper and lower support positions for one liquid bag 240 in the bag holder 502 is smaller than the separation dimension between the upper and lower supported positions of the liquid bag 240. Therefore, the liquid bag 240 supported by the bag holder 502 is not subjected to excessive tension in the vertical direction and is partially bent forward. This reduces the stress acting on the liquid bag 240, and requires only a small liquid pressure when putting liquid into the storage chamber 242, so that the liquid can be stored smoothly.

[0085] As described above, each liquid bag 240 is supported by the bag holder 502, whereby the bag unit 501 and the bag holder 502 are integrated to form the liquid bag set 500. Next, this liquid bag set 500 is supported by a holder hanger 503.

[0086] Specifically, a total of four upper supported portions 550 of the first holder portion 512 and the second holder portion 513 are suspended from left and right upper support hooks 565 of the panel hanger 503. At the same time, left and right lower supported portions 551 of the lower first holder portion 512 are suspended from left and right lower support hooks 563 of the panel hanger 503, and the panel extension portion 540 and joint holder 541 of the first holder portion 512 are suspended from the central support hook 564 of the panel hanger 503.

[0087] Furthermore, a joint support part 570 of the blood processing apparatus 400 supports an L-shaped joint 253 in the common line 211 connected to the first liquid bag 212, and a joint support part 571 supports an L-shaped joint 263 in the recovery line 230 connected to the second liquid bag 230. As a result, the bag unit 501 is divided by the L-shaped joints 253, 263 into a measurement part A where the liquid is measured by the weight sensor of the blood processing apparatus 400, and a non-measurement part B where the liquid is not measured. The measurement part A includes the liquid bag 240, the first tubes 250, 260, the L-shaped joints 251, 261, and the second tubes 252, 262. The non-measurement part includes the L-shaped joints 253, 263 and the third tubes 254, 264.

[0088] In this way, by supporting common line 211 and recovery line 230 midway in a portion of blood processing device 400 that is not measured by the weight sensor, a portion A measured by the weight sensor and a portion B not measured are clearly separated, so that liquid bag 240 can be accurately measured even if the posture of each line 211, 230 changes. Also, liquid bag 240 and bag holder 502 are separate entities, allowing suitable materials to be selected for each, so that liquid bag set 500 can be realized that can achieve both accurate measurement and low cost.

[0089] [3. Pump tube set] As shown in Fig. 1, the blood processing circuit 1 according to this embodiment includes a tube holder 224 that integrally supports the lines 213, 214, 230 in order to improve the convenience of the work when the lines 213, 214, 230 are set in the pump unit 202. A pump tube set 600 consisting of the tube holder 224 and the lines 213, 214, 230 supported by the tube holder 224 will be described in detail with reference to Figs. 7 to 9. In the following, each tube constituting the part of the lines 213, 214, 230 included in the pump tube set 600 will be referred to as a tube 601.

[0090] Fig. 7 shows three views of the tube holder 224, with the left side showing the tube holder 224 as seen from the right side, the center showing the tube holder 224 as seen from the rear, and the right side showing the tube holder 224 as seen from the left side. As shown in Fig. 7, the tube holder 224 has a holder body 602 that is long in the vertical direction and has a plate-like (or band-like) shape, and a plate-like rib 603 that protrudes from the holder body 602. The holder body 602 has a length L that corresponds to the vertical dimension of the pump unit 202, and a width dimension W1 that is larger than the diameter of the tube 601. The holder body 602 is disposed with its main surface facing left and right.

[0091] The holder body 602 has an upper end and a lower end formed into an arc-shaped contour, and has three insertion holes 604 corresponding to the lines 213, 214, and 230. The three insertion holes 604 are aligned along the long side of the holder body 602 and form supports that individually support each tube 601. That is, the central insertion hole 604 supports the tube 601 of the dialysate line 213, the upper insertion hole 604 supports the tube 601 of the post-fluid replacement line 214, and the lower insertion hole 604 supports the tube 601 of the recovery line 230. Therefore, each insertion hole 604 has a diameter W2 that is the same as or slightly smaller than the diameter of the tube 601.

[0092] Each insertion hole 604 is located on one side in the width direction of the holder body 602 (rear side in FIG. 7). That is, the center of each insertion hole 604 is located rearward of the center of the width direction of the holder body 602. Furthermore, a notch 605 is formed in the edge of the long side on the rear side of the holder body 602 at a location corresponding to each insertion hole 604. Therefore, each insertion hole 604 is partially opened rearward by the notch 605, and the flexible tube 601 can be fitted into the insertion hole 604 through this notch 605.

[0093] In the holder body 602, a rib 603 is provided between the central through-hole 604 and the edge of the long side on the front side of the holder body 602. In this embodiment, the rib 603 is provided so as to be flush with the edge of the long side on the front side of the holder body 602 in a side view. The rib 603 is a plate-like shape that is long in the vertical direction, and its width direction coincides with the direction intersecting with the main surface of the holder body 602 (the direction perpendicular in FIG. 7). The vertical center part of the holder body 602 tends to have low strength because the width dimension of the remaining part is small due to the presence of the central through-hole 604, but the strength of this part is supplemented by the rib 603.

[0094] The rib 603 has a rib 603a extending leftward from the left main surface of the holder body 602 and a rib 603b extending rightward from the right main surface of the holder body 602, and the two ribs 603a, 603b are positioned in the same vertical direction. On the other hand, the central position of the longitudinal direction of the rib 603 does not coincide with the vertical position of the center of the central insertion hole 604, and is positioned above the center of the central insertion hole 604.

[0095] The left rib 603a is formed so that the thickness dimension is the same as the left rib 603a. On the other hand, the right rib 603b has an upper portion 610 with the same thickness dimension as the left rib 603a, and a lower portion 611 with a smaller thickness. More specifically, in the right rib 603b, the upper portion 610 and the lower portion 611 are flush with each other, but the rear surface of the lower portion 611 is offset forward from the rear surface of the upper portion 610. The lower portion 611 of the rib 603b is located in front of the central through-hole 604, and the upper portion 610 is located above the through-hole 604. In this way, the rear surface of the lower portion 611 adjacent to the through-hole 604 in the rib 603b is offset forward (in the direction away from the through-hole 604), thereby avoiding interference with the joint 620 (see FIG. 8) of the tube 601 inserted through the through-hole 604.

[0096] 8, in pump tube set 600, tube holder 224 supports three tubes 601 constituting three lines 213, 214, and 230. Of these, tube 601 constituting dialysate line 213 has joints 620 attached to both ends and is connected to the other tubes constituting dialysate line 213 via these joints 620. Tube 601 constituting post-fluid replacement line 214 also has joints 620 attached to both ends and is connected to the other tubes constituting post-fluid replacement line 214 via these joints 620. Tube 601 constituting recovery line 230 also has joints 620 attached to both ends and is connected to the other tubes constituting recovery line 230 via these joints 620.

[0097] The tube holder 224 supports each tube 601 at a position on the left side near the right-side joint 620. The joint 620 has a smaller diameter than the notch 605 of the through-hole 604 of the tube holder 224 and the diameter (W2) of the through-hole 604.

[0098] The two joints 620 attached to both ends of each tube 601 are colored differently from each other. For example, in the present embodiment, in the dialysis fluid line 213, the joint 620 on the left side (upstream side in the flow direction of the dialysis fluid) of the tube 601 is colored red, and the joint 620 on the right side (downstream side) is transparent. In the post-replacement fluid line 214, the joint 620 on the left side (upstream side in the flow direction of the post-replacement fluid) of the tube 601 is colored red, and the joint 620 on the right side (downstream side) is transparent. In the recovery line 230, the joint 620 on the left side (downstream side in the flow direction of the drainage fluid) of the tube 601 is colored transparent, and the joint 620 on the right side (upstream side) is colored red. In each tube 601, a predetermined portion between the left joint 620 and the tube holder 224 forms a pressurized portion 601a that is pressurized by the pump unit 202.

[0099] FIG. 9 is a perspective view of the pump tube set 600 placed slightly away from the pump unit 202. As shown in FIG. 9, the pump unit 202 has three finger pumps 221-223 in order from the top, which clamp and pressurize the pressurized portion 601a of each tube 601, thereby sending the liquid in the tube 601 in a predetermined direction. In this embodiment, when the upper finger pump 221 is driven, the replacement fluid in the tube 601 of the post-replacement fluid line 214 is sent to the right in the figure, when the central finger pump 222 is driven, the dialysis fluid in the tube 01 of the dialysis fluid line 213 is sent to the right in the figure, and when the lower finger pump 223 is driven, the drainage fluid in the tube 601 of the recovery line 230 is sent to the left in the figure. In addition, the pump unit 202 has a joint mounting part 630 on the left side of the finger pumps 221-223 and a holder mounting part 640 on the right side.

[0100] Three left joint mounting parts 630 are provided corresponding to the left joints 620 of each tube 601. Each joint mounting part 630 has a recessed portion that opens forward, and is shaped to match the outline of the joint 620 when viewed from the front. The right holder mounting part 640 has a recessed groove 641 that is long in the vertical direction, and this groove 641 is sandwiched between left and right wall parts 642, 643. The left wall part 642 has cutouts 642a corresponding to the three tubes 601 supported by the tube holder 224, and the right wall part 643 has cutouts 643a corresponding to the joints 620 attached to the right ends of the tubes 601. These cutouts 642a, 643a open in the left-right direction and forward.

[0101] Furthermore, rib fitting portions 642b, 643b recessed toward the rear are formed in the central front portions of the left and right wall portions 642, 643. These rib fitting portions 642b, 643b extend upward from the front portions of the vertically central cutouts 642a, 643a, into which the rib 603 fits when the tube holder 224 is correctly attached to the holder attachment portion 640. Specifically, the left rib 603a fits from the front into the left rib fitting portion 642a, and the right rib 603b fits from the front into the right rib fitting portion 643a.

[0102] The right wall 643 is provided with a movable protrusion 651 having a sphere 651a biased leftward by a spring or the like, and the sphere 651a partially protrudes leftward from the left side surface of the right wall 643. Such movable protrusions 651 are provided at two locations: a location between the two central and upper notches 643a and close to the upper notch 643a, and a location between the two central and lower notches 643a and close to the lower notch 643a. Meanwhile, the tube holder 224 is provided with a recess 652 corresponding to the movable protrusion 651. The recesses 652 are provided at two locations: one between the central and upper two insertion holes 604 and close to the upper insertion hole 604 among the three insertion holes 604 lined up vertically, and the other between the central and lower two insertion holes 604 and close to the lower insertion hole 604. In this embodiment, each recess 652 is formed as a through hole penetrating the holder main body 602 in the left-right direction (thickness direction).

[0103] The movable convex portion 651 and the concave portion 652 constitute a detent mechanism 650. That is, when the tube holder 224 is fitted into the holder mounting portion 640, the movable convex portion 651 is first pressed rightward by the front side surface of the holder body 602, and the sphere 651a retracts. When the tube holder 224 is further fitted into the back and reaches a predetermined position (appropriate mounting position), the concave portion 652 of the holder body 602 faces the side of the movable convex portion 651. At this time, the sphere 651a of the movable convex portion 651 is biased toward the holder body 602 side and protrudes, and fits into the concave portion 652. In this way, when the tube holder 224 is properly mounted to the holder mounting portion 640, the movable convex portion 651 and the concave portion 652 engage with each other, and a sense of detent is generated when the sphere 651a protrudes. The configuration of the detent mechanism 650 is not limited to the above, and other configurations may be adopted as long as they provide the operator with a sense of detent when attaching the tube holder 224.

[0104] Furthermore, the rib 603 of the tube holder 224 forms a pressure receiving portion that receives pressure from the operator's fingers when the tube holder 224 is attached to the holder attachment portion 640. That is, the tube holder 224 is attached to the holder attachment portion 640 by holding the left and right ends of the rib 603 with, for example, the thumb and middle finger and pressing the front surface of the rib 603 backward with the tip of the index finger. However, the procedure for attaching the tube holder 224 to the holder attachment portion 640 is not limited to the above, and the tube holder 224 may be attached by other gripping methods.

[0105] As can be seen from the above description, the tube holder 224 can be attached to the holder attachment portion 640 in only one position (first position), and cannot be attached in any other position (second position). Specifically, as shown in FIG. 9, the first position is when the rib 603 is located on the front side (near side) and is offset upward from the center position in the vertical direction, and in this position, the tube holder 224 is properly attached to the holder attachment portion 640. In contrast, in a position reversed from the first position, the rib 603 abuts against the front ends of the left and right wall portions 642 and 643, and the holder main body 602 does not fit into the groove 641. In addition, in a position reversed from the first position, the rib 603 does not fit into the rib fitting portions 642b and 643b, and the holder main body 602 fits only halfway into the groove 641. This prevents the orientation of the tube holder 224 from being misidentified.

[0106] (Embodiment 2) FIG. 10 is a schematic diagram showing the overall configuration of a blood processing circuit including a liquid bag set and a pump tube set according to embodiment 2. As in embodiment 1, a blood processing circuit 1A used for HDF among RRT is shown as an example. This blood processing circuit 1A is generally the same as the blood processing circuit 1 in FIG. 1, but the connection mode of some lines is different from that of the blood processing circuit 1 in FIG. 1. This difference will be specifically described below. Note that in the blood processing circuit 1A in FIG. 10, the same reference numerals are used to designate components corresponding to those of the blood processing circuit 1 in FIG. 1.

[0107] In the blood treatment circuit 1A of Fig. 10, among the three lines 213, 214, and 230 passing through the pump unit 202, the connection mode between the dialysate line 213 and the recovery line 230 and the filter 102 is different from that of the blood treatment circuit 1 of Fig. 1. That is, when the dialysate line 213 goes downstream (to the right in Fig. 10) from the pump unit 202, it is connected to the dialysate heating line 301 extending from the upper part of the dialysate heater 303. The dialysate heating line 301 goes from the upper part to the lower part inside the dialysate heater 303, and further extends from the lower part of the dialysate heater 303 and is connected to the dialysate port 124 provided at the upper part of the filter 102. On the other hand, the upstream end of the recovery line 230 is connected to the drainage port 25 provided at the lower part of the filter 102.

[0108] The above-described blood treatment circuit 1A can also achieve the same effects as those of the blood treatment circuit 1 according to the first embodiment.

[0109] The priming procedure when using this blood processing circuit 1A will be outlined with reference to Figures 10 and 11. Figure 11 is a schematic diagram showing the configuration when the filter is turned upside down (upside down) in the circuit of Figure 10. In priming, the blood pump 110 and the pump unit 202 are driven to pass physiological saline through each part, thereby performing washing, air removal, etc.

[0110] Specifically, priming of the blood processing circuit 1A includes the following steps (1) to (9). Note that the following mainly refers to the driving of the pumps 110 and 202 and the flow of physiological saline, and explanations of other operations are omitted, but clamp opening and closing operations necessary for executing each step are performed as appropriate. (1) In the state shown in FIG. 10, a bag 112 containing physiological saline is connected to a saline line 111 branching off from the blood removal line 101. (2) The blood pump 110 is driven. This causes saline to pass through the saline line 111, the blood removal line 101, the arterial pressure chamber 115, the filter 102 (inside the filter 121 of the filter 102), and the blood return line 103 (passing through the mixing chamber 130 on the way). (3) Turn the filter 102 upside down to the state shown in FIG. (4) Saline is again passed from the bag 112 through the circuit 1A, the blood pump 110 is driven, and the finger pump 222 of the pump unit 202 to which the recovery line 230 is attached is driven in the same forward direction as during treatment. This causes the saline to pass through the saline line 111, the blood removal line 101, the arterial pressure chamber 115, the filter 102, the recovery line 230, and the waste line 232 in this order. (5) Instead of the finger pump 222 to which the recovery line 230 is attached, the finger pump 222 to which the dialysate line 213 is attached is driven in the opposite direction to that during treatment. This causes the saline solution to pass through the saline line 111, the blood removal line 101, the arterial pressure chamber 115, the filter 102, the dialysate heating line 301, the dialysate line 213, and the first fluid bag 212 in this order. (6) The blood pump 110 is stopped, and the storage bag 210 containing the saline solution is connected to the common line 211. Furthermore, the finger pump 222 to which the dialysis solution line 213 is set is driven in the same forward direction as that during treatment, and the finger pump 222 to which the recovery line 230 is set is also driven in the same forward direction as that during treatment. As a result, the saline solution passes through the common line 211, the dialysis solution line 213, the dialysis solution heating line 301, the filter 102, the recovery line 230, and the waste line 232 in this order. (7) The bag 112 containing physiological saline is connected to the saline line 111, and the blood pump 110 is driven, while the finger pump 222 to which the dialysis fluid line 213 is set is driven in the opposite direction to that during treatment. This causes the physiological saline to flow through the saline line 111, the blood removal line 101, the arterial pressure chamber 115, the filter 102, the dialysis fluid heating line 301, the dialysis fluid line 213, the common line 211, and the storage bag 210 in this order. (8) Stop the pumps 110 and 222. The physiological saline in the storage bag 210 flows into the first fluid bag 212 via the common line 211 due to its own weight. (9) The finger pump 222 to which the post-replacement fluid line 214 is set is driven in the same forward direction as during treatment. This causes the saline in the first fluid bag 212 to flow through the post-replacement fluid line 214, the post-replacement fluid heating line 302, the mixing chamber 130, and the blood return line 103 in this order.

[0111] Incidentally, the treating fluid set 200 constituting this blood treatment circuit 1A is provided with markings to prevent erroneous connection when connecting to the blood treatment device 400 or other lines. In the treating fluid set 200 in the developed state shown in Fig. 12, each marking is shown as a triangular icon (similar to Figs. 10 and 11). As shown in Fig. 12, a marking 710 is provided near the connection portion of the dialysis fluid line 213 with the dialysis fluid heating line 301. This marking 710 is made of, for example, a colored tape, and is, for example, green. A marking of the same color, green, is also provided near the connection portion of the dialysis fluid heating line 301 with the dialysis fluid line 213 (not shown).

[0112] Similarly, a marking 711 made of blue color tape is attached to the post-fluid replacement line 214 near the connection with the post-fluid replacement heating line 302. A marking of the same color, blue, is also attached to the post-fluid replacement heating line 302 near the connection with the post-fluid replacement line 214 (not shown). Markings 712 and 713 made of yellow color tape are attached to the collection line 230 near the connection with the drainage port 125 and near the connection with the pressure measurement line 703 with the blood processing device 400. A marking of the same color, yellow, is also attached to the connection with the drainage port 125 and the pressure measurement line 703 in the blood processing device 400.

[0113] This allows the connection combination to be easily grasped when connecting each line of the treatment liquid set 200 to other lines, etc., and makes it possible to prevent the occurrence of erroneous connections.

[0114] In addition, since this processing liquid set 200 has multiple lines, if the lines become tangled when not in use, handling can be difficult; however, by bundling the lines together when not in use, handling is made easier.

[0115] 13, in the unused treatment solution set 200, a plurality of lines are bundled together by clips 720 to 723. Specifically, a bundle of waste lines 232 wound in a circular shape is held by a small clip 720, a bundle of common lines 211 wound in a circular shape is held by a small clip 721, and further, the bundle of waste lines 232 and the bundle of common lines 211 are held together by a large clip 722. Furthermore, a bundle of dialysis solution lines 213 wound in a circular shape and a bundle of recovery lines 230 wound in a circular shape are held together by a large clip 723.

[0116] This prevents multiple lines from becoming entangled while an unused processing liquid set 200 is stored in a storage bag or when the processing liquid set 200 is removed from the storage bag in preparation for treatment, thereby reducing the effort required during use. [Industrial Applicability]

[0117] The present invention can be suitably applied to a liquid bag set, a pump tube set, and a tube holder that constitute a blood treatment circuit for RRT. [Explanation of symbols]

[0118] 1,1A Blood Processing Circuit 212 First Liquid Bag 224 Tube Holder 231 Second Liquid Bag 240 Liquid bag (1st liquid bag, 2nd liquid bag) 244 Through hole 250,260 1st tube 251,253,261,263 L-shaped joint 252,262 2nd Tube 254,264 3rd Tube 500 Liquid Bag Set 501 Bag Unit 502 Bag Holder 510 Panel 511 Support Arm 530 Proximal end 531 Tip 532 Cutting section 540a Space (cutout) 550 Upper supported part 551 Lower supported part 570,571 Joint support 600 Pump Tube Set 601 Tube 601a Pressurized part 602 Holder body 603 Rib (pressure receiving part) 604 Insertion hole 651 Movable convex part 652 Recess A Measuring part B Non-metering part

Claims

1. A liquid bag set for use in a blood treatment circuit to store a liquid flowing through the circuit, and for use in measuring a liquid weight measured by a weight sensor of a blood treatment device that controls blood treatment by the circuit, comprising: a plurality of bags including a first bag for storing liquid and a second bag located above the first bag; a holder configured separately from the first bag and the second bag, integrally supporting the first bag and the second bag, and being attached to the blood processing device so as to be weighed by the weight sensor together with the first bag and the second bag; a tube connected at one end to the bag for supplying liquid to the bag or discharging liquid from the bag; The tube is a supported portion supported by the blood processing device; a measurement portion that is a portion closer to the one end than the supported portion and is measured by the weight sensor; a non-weighing portion that is a portion on the other end side of the supported portion and is not weighed by the weight sensor, The tube connected to the second bag among the tubes has a lateral extension portion extending laterally between the first bag and the second bag. Liquid bag set.

2. The holder includes a flat panel and a support arm extending from the panel. The plurality of bags have through holes through which the support arms are inserted.

2. The fluid bag set of claim 1.

3. The first bag stores a dialysis fluid or a replacement fluid, the second bag stores a drainage fluid from a filter of the blood treatment circuit, and the first bag is located vertically below the second bag.

2. The fluid bag set of claim 1.

4. a lower tube extending from the first bag extends in one direction in the left-right direction, and an upper tube extending from the second bag extends in the other direction in the left-right direction; 2. The fluid bag set of claim 1.

5. the first bag has a lower tube connecting portion to which the lower tube is connected, the lower tube connecting portion being offset to the other side in the left-right direction with respect to the first bag, the second bag has an upper tube connecting portion to which the upper tube is connected, and the upper tube connecting portion is located offset to one side in the left-right direction with respect to the second bag.

5. The fluid bag set according to claim 4.

6. the holder has a notch at a portion overlapping with the tube when viewed from the front in a state where the holder is attached to the blood processing device; 2. The fluid bag set of claim 1.

7. 2. The fluid bag set according to claim 1, wherein the holder is made of a material harder than the bag and is supported by the blood processing device in a state where the holder supports the bag and is integral with the bag.

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