JP7165528B2 - Heating panel, panel circuit and blood purification device - Google Patents

Description

The present invention relates to a heating panel, a panel circuit and a blood purification device.

Extracorporeal circulation therapy such as dialysis therapy and plasma exchange therapy is performed using a blood purification device. This type of blood purification apparatus has, for example, a blood circuit for supplying a patient's blood to a blood purifier, purifying it, and returning it to the patient, and a replacement fluid circuit for replenishing the blood with replacement fluid (see Patent Document 1). For example, replacement fluid sent to a patient needs to be heated to a predetermined temperature range. Therefore, the replacement fluid circuit has a liquid flow path and a heating panel for heating the liquid flowing through the liquid flow path. is provided.

The heating panel as described above is held by, for example, a frame-like frame to form a panel circuit, and the panel circuit is attached to the main body of the blood purification apparatus (see Patent Document 2). At this time, the heating panel is in contact with a heat plate that serves as a heat source for the blood purification apparatus.

The heating panel is locked to the frame by being hooked on the hook of the frame (paragraph 0029 of Patent Document 2). Also, the heating panel is manufactured by using blow molding with a relatively hard material such as PP (polypropylene) (Patent Document 2, paragraph 0026).

Japanese Patent No. 5160455 JP 2015-073847 A

By the way, for example, when the panel circuit is transported during shipment or use, stress is applied intensively to the engaging portion of the heating panel between the heating panel and the frame, and the engaging portion may be damaged. If the locking portion is damaged, the heating panel will come off the frame, making the panel circuit unusable.

The present application has been made in view of such a point, and one of the objects thereof is to suppress breakage of the locking portion of the heating panel.

As a result of intensive studies, the inventors of the present invention have found that the above problem can be solved by making the locking portion of the heating panel softer than the panel main body, and have completed the present invention.

That is, the present invention includes the following aspects.
(1) A heating panel provided with a liquid channel through which liquid flows and for heating the liquid flowing through the liquid channel, comprising: a panel body having the liquid channel; a locking portion for locking to a member, said locking portion being softer than said panel body portion.
(2) The heating panel according to (1), wherein the locking portion and the panel body portion are made of the same kind of resin with different hardnesses.
(3) The heating panel according to (2), wherein the engaging portion is made of soft vinyl chloride, and the panel main body is made of semi-hard vinyl chloride.
(4) The heating panel according to any one of (1) to (3), wherein the engaging portion has a U-shaped string.
(5) The heating panel according to any one of (1) to (3), wherein the locking portion is an annular body having a locking hole.
(6) The heating panel according to (1), wherein the locking portion is a soft sheet having locking holes.
(7) The panel main body has a surface having a groove serving as a liquid flow path and a back surface having a flat sheet closing the groove, the back surface sheet extending from the edge of the front surface. The heating panel according to (6), wherein the heating panel has an extension that extends from the heating panel, and the extension constitutes the locking portion.
(8) According to (7), the front surface of the panel main body is made of semi-rigid vinyl chloride, and the flat sheet on the rear surface of the panel main body and the locking portion are made of soft vinyl chloride. heating panel.
(9) The heating panel according to any one of (1) to (8), wherein the panel body has a connecting portion for connecting a tube to the liquid channel.
(10) The heating panel according to any one of (1) to (9), a frame-shaped frame having an opening in the center in which the heating panel is arranged, and the heating panel. a tube connected to the liquid flow path and held by the frame, wherein the heating panel is locked to the frame by the locking portion.
(11) A blood purification device comprising the panel circuit according to (10).

According to the present invention, it is possible to suppress breakage of the locking portion of the heating panel during transportation of the panel circuit.

It is a perspective view showing an example of a blood purification device. It is an explanatory view showing an example of composition of a liquid circuit. It is a front view of a heating panel. FIG. 4 is an enlarged view of the mounting portion of the heating panel and the frame; FIG. 4 is an explanatory diagram showing a cross section of a portion of the heating panel where the locking portion is located; FIG. 4 is an explanatory view showing a cross section of a heating panel when forming the heating panel; FIG. 4 is an explanatory diagram showing a cross section of a portion of a heating panel where tubes are connected; FIG. 4 is an explanatory view showing a cross section of a heating panel when connecting a tube to the heating panel; FIG. 4 is an explanatory diagram showing the configuration of a measuring chamber; FIG. 10 is a front view of a heating panel having locking portions of another embodiment; FIG. 11 is a front view of a heating panel of another embodiment; FIG. 11 is an explanatory diagram showing a cross section of a portion of a heating panel of another embodiment having a locking portion. FIG. 10 is an enlarged view of the mounting portion of the heating panel and frame in another embodiment;

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

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

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

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

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

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

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

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

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

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

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

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

<Panel circuit>
The panel circuit 40 shown in FIG. 2 holds, for example, at least part of the dialysate flow path 121, at least part of the waste fluid flow path 130, and at least part of the replacement fluid flow path 141, and is detachable from the device main body 10. It is configured. The panel circuit 40 includes, for example, a rectangular frame-shaped frame 160, a heating panel 50 that is attached to an opening inside the frame 160 and has a part of the liquid flow path of the liquid circuit 14, and is fixed to the frame 160 so that the liquid It has a flexible tube 161 forming part of the liquid flow path of circuit 14 and a metering chamber 51 .

The frame 160 is formed in a rectangular frame shape and is made of hard resin such as ABS resin. The frame 160 has an opening 160a in the center in which the heating panel 50 is arranged, and hooks for engaging engaging portions 171 of the heating panel 50, which will be described later, on the upper and lower edges of the opening 160a. 160b is provided. The hooks 160b are provided at four locations, for example, so as to correspond to the locking portions 171 of the heating panel 50. As shown in FIG. The frame 160 is provided with a plurality of fixing parts (not shown) for fixing the tubes 161 connected to the heating panel 50 .

As shown in FIGS. 3 and 4, the heating panel 50 has a substantially rectangular thin plate shape. The heating panel 50 includes a panel main body 170 having a liquid channel, and an engaging portion 171 for engaging the panel main body 170 with a hook 160b of a frame 160 as another member.

The panel body portion 170 is formed in a thin rectangular shape. The panel body 170 has two continuous liquid flow paths 182 from the inlet 180 to the outlet 181 . The entrance portion 180 and the exit portion 181 are provided on one short side (upper side) of the panel body portion 170 in the longitudinal direction. Each liquid channel 182 has a meandering portion 200 that extends downward while meandering left and right from the inlet portion 180 , and an outlet portion 181 that passes straight from the lower portion of the meandering portion 200 along the side of the meandering portion 200 . It has a straight portion 201 to be connected. The two liquid flow paths 182 are arranged side by side on the left and right sides of the panel body portion 170 . The inlet portion 180 and the outlet portion 181 constitute a connection portion for connecting the tube 161 to the liquid flow path 182 of the panel body portion 170 .

The panel main body 170 is made of vinyl chloride, which is a semi-rigid resin, for example. The hardness of the semi-rigid resin of the panel body 170 is 74D (JIS K-7215) or higher. The panel main body 170 has, as shown in FIG. 5, a surface 170a having grooves 210 that serve as, for example, liquid flow paths 182, and a back surface 170b of a flat sheet without irregularities. As shown in FIG. 6, the panel main body 170 is formed by, for example, forming a front surface 170a by vacuum molding, molding a rear surface 170b by extrusion molding, and then high-frequency welding them together.

As shown in FIG. 3, the locking portions 171 are provided, for example, at two locations on each of the upper and lower short sides in the longitudinal direction of the panel main body portion 170 . The locking portion 171 is, for example, a U-shaped soft cord. The locking portion 171 is made of, for example, the same type of resin, such as vinyl chloride, which is softer than the panel main body portion 170 and has lower hardness than the panel body portion 170 . The hardness of the soft resin of the locking portion 171 is 80A (JIS K-7215) or less, preferably 70A (JIS K-7215) or less. The engaging portion 171 is welded to the panel main body 170 by being sandwiched between the front surface 170a and the rear surface 170b of the panel main body 170, as shown in FIGS. 5 and 6, for example. Note that the engaging portion 171 may be welded without being sandwiched between the front surface 170a and the rear surface 170b of the panel body portion 170 .

As shown in FIG. 3 , a tube 161 is connected to an inlet portion 180 and an outlet portion 181 of the panel body portion 170 . The tube 161 is made of vinyl chloride, which is a soft resin similar to that of the panel main body 170 . As shown in FIGS. 7 and 8, the tube 161 is welded to the panel body 170 by sandwiching it between the front surface 170a and the back surface 170b of the panel body 170, for example.

As shown in FIG. 2, the two liquid flow paths 182 of the heating panel 50 are connected to the tube 161 of the dialysate flow path 121 and the tube 161 of the replacement fluid flow path 141 . As a result, one liquid flow path 182 constitutes a part of the dialysate flow path 121 and the other liquid flow path 182 constitutes a part of the replacement fluid flow path 141 .

<Weighing chamber>
As shown in FIG. 2, metering chamber 51 is provided below panel circuit 40 . In order to manage the amount of water removed from the patient, the measuring chamber 51 measures the amount of dialysate supplied to the blood purifier 70, the amount of dialysate discharged from the blood purifier 70, and the amount of dialysate discharged from the blood purifier 70, and the amount of dialysate supplied to the blood circuit 71. It is a chamber for measuring the total amount of replacement fluid. As shown in FIG. 9, the metering chamber 51 is formed in a panel shape and made of thermoplastic resin. The metering chamber 51 has three reservoirs 230, 231, 232, seven ports 240-246, and seven channels 250-256.

The reservoirs 230 , 231 , 232 are arranged side by side in this order at the bottom of the weighing chamber 51 . The first to fourth ports 240 to 243 are provided, for example, on the left side of the upper portion of the weighing chamber 51 in this order from bottom to top, and the fifth to seventh ports 244 to 246 are provided on the right side from bottom to top. are provided in this order for The first flow path 250 connects the first reservoir 230 and the first inlet/outlet 240, the second flow path 251 connects the first reservoir 230 and the second inlet/outlet 241, The third flow path 252 connects the second reservoir 231 and the third inlet/outlet 242, and the fourth flow path 253 connects the second reservoir 231 and the fourth inlet/outlet 243. there is The fifth channel 254 connects the second reservoir 231 and the fifth inlet/outlet 244, and the sixth channel 255 connects the third reservoir 232 and the sixth inlet/outlet 245. there is A seventh flow path 256 connects the third reservoir 232 and the seventh inlet/outlet 246 .

The first inlet/outlet 240 and the second inlet/outlet 241 are connected to the tube 161 of the waste liquid flow path 130 of the panel circuit 40 via connection tubes 260 and 261 . As a result, the first storage unit 230 functions as a measurement unit that temporarily stores and measures the dialysate discharged from the blood purifier 70 . The third inlet/outlet 242 and the fifth inlet/outlet 244 are connected to the tube 161 of the dialysate flow path 121 of the panel circuit 40 via connecting tubes 262 and 263 . Thereby, the second storage part 231 functions as a measuring part that temporarily stores and measures the dialysate to be supplied to the blood purifier 70 . The sixth inlet/outlet 245 is connected to the tube 161 of the replacement fluid channel 141 of the panel circuit 40 via a connection tube 264 . Thereby, the third storage part 232 functions as a measuring part that temporarily stores and measures the replacement fluid supplied to the blood circuit 71 .

The measuring chamber 51 is measured by a measuring device (not shown) to measure the amount of dialysate supplied to the blood purifier 70, the amount of waste dialysate discharged from the blood purifier 70, and the amount of replacement fluid supplied to the blood circuit 71. By weighing the total weight of the volume, changes in the total weight, ie changes in the amount of water removed by the patient, can be captured.

According to this embodiment, the heating panel 50 includes the panel main body portion 170 and the engaging portion 171 , and the engaging portion 171 is softer than the panel main body portion 170 . When transported in a stopped state, the locking portion 171 on which stress is concentrated can be moved flexibly to release the force and prevent the locking portion 171 from being damaged.

Since the engaging portion 171 and the panel main body portion 170 are made of the same kind of resin, they are easily welded to each other, and the heating panel 50 can be manufactured easily.

Since the locking portion 171 is made of soft vinyl chloride and the panel main body portion 170 is made of semi-hard vinyl chloride, the locking portion 171 and the panel main body portion 170 can be easily welded. In addition, since the panel main body 170 is made of the same kind of resin as the vinyl chloride tube 161, the tube 161 can be easily welded to the liquid flow path 182 of the panel main body 170 without interposing any other connecting member. can be done. In addition, since the locking portion 171 is made of soft vinyl chloride, the strength of the resin does not decrease in a low-temperature environment as compared with the semi-rigid vinyl chloride of the panel main body portion 170 . As a result, it is possible to effectively prevent the locking portion 171 from being damaged when the panel circuit 40 is transported at a low temperature.

Since the engaging portion 171 has a U-shaped string, it can be easily hooked to the frame 160 . In addition, since the engaging portion 171 easily follows the movement of the heating panel 50, the external force can be released, and breakage of the engaging portion 171 can be more effectively suppressed. The U-shaped string of the locking portion 171 may not be curved, and may have corners. Also, a part of the locking portion 171 may be a string.

In the above embodiment, the locking portion 171 may have another configuration. For example, the locking portion 171 may be an annular body having a locking hole 280 as shown in FIG. In this case, the engaging portion 171 may be formed, for example, in the shape of a square frame and have a square engaging hole 280 inside. The locking portion 171 may be made of soft vinyl chloride and molded by injection molding or the like. For example, the locking portion 171 is welded to the panel body portion 170 .

Alternatively, the locking portion 171 may be a soft sheet formed with a cut 300 for forming a locking hole 301 as shown in FIG. In this case, as shown in FIG. 12, the flat sheet of the rear surface 170b of the panel main body 170 has an extension A extending from the edge of the front surface 170a, and the extension A constitutes the locking portion 171. may In this case, the front surface 170a of the panel main body 170 is made of semi-rigid vinyl chloride, and the flat sheet of the rear surface 170b of the panel main body 170 and the engaging portion 171 are made of soft vinyl chloride. The soft sheet of the locking portion 171 (flat sheet of the back surface 170b) has a thickness of about 0.4 mm, for example. As shown in FIG. 11 , a substantially U-shaped notch 300 is formed in the locking portion 171 , and the notch 300 defines a locking hole 301 inside. As shown in FIG. 13, the heating panel 50 is locked to the frame 160 by hooking the hook 160b of the frame 160 through the locking hole 301. As shown in FIG.

According to the present embodiment, panel main body 170 is made of semi-hard resin (front surface) and soft resin (back surface), and locking portion 171 is made of soft resin. It is softer than the panel body portion 170 . Therefore, according to the present embodiment, when the heating panel 50 is transported in a state where it is locked to the frame 160, the locking portion 171 where stress is concentrated moves flexibly, thereby releasing the force and allowing the heating panel 50 to move. It is possible to suppress the breakage of the stopping portion 171 . Further, according to the present embodiment, the locking portion 171 is integrated with the rear surface 170b of the panel main body portion 170, so that the heating panel 50 can be manufactured easily. Moreover, the connection strength between the engaging portion 171 and the panel body portion 170 is increased. The locking portion 171 may not have the locking hole 301 formed by the notch 300, and may simply have the locking hole 301 formed therein.

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

For example, the shape, structure, and number of the locking portions 171 of the heating panel 50 may be different. The arrangement and shape of the liquid flow path 182 of the panel main body 170 and the shape and structure of the panel main body 170 may also be different. Although the heating panel 50 is locked to the frame 160, the present invention can also be applied when it is locked to another member. The material of the locking portion 171 is, for example, soft vinyl chloride, but other materials such as elastomer may be used. The material of the panel main body 170 is, for example, semi-rigid vinyl chloride, but other materials such as rigid vinyl chloride and PC (polycarbonate) may be used.

Further, the configurations of blood purification apparatus 1 including heating panel 50 and panel circuit 40 are not limited to those of the above embodiments. For example, the blood purification apparatus 1 in the above embodiment performs dialysis therapy, but the present invention can also be applied to a blood purification apparatus that performs plasma exchange therapy, leukocyte removal therapy, continuous slow hemofiltration therapy, and the like.

INDUSTRIAL APPLICABILITY The present invention is useful for suppressing breakage of locking portions of heating panels.

Reference Signs List 1 blood purification device 40 panel circuit 50 heating panel 160 frame 170 panel body portion 171 locking portion 182 liquid flow path

Claims (10)

A heating panel comprising a liquid channel through which liquid flows and for heating the liquid flowing through the liquid channel,
a panel main body portion having the liquid flow path;
a locking portion for locking the panel main body to another member;
The locking portion is softer than the panel main body ,
The heating panel, wherein the engaging portion and the panel body portion are made of the same kind of resin having different hardnesses . The locking portion is made of soft vinyl chloride,
2. The heating panel of claim 1 , wherein the panel body is constructed of semi-rigid vinyl chloride. The heating panel according to claim 1 or 2 , wherein the locking portion has a U-shaped string. 3. The heating panel according to claim 1 , wherein the engaging portion is an annular body having an engaging hole. 2. The heating panel according to claim 1, wherein the locking portion is a soft sheet having locking holes. The panel main body has a surface having a groove that serves as a liquid flow path and a back surface having a planar sheet that closes the groove,
6. The heating panel of claim 5 , wherein said back planar sheet has extensions extending from said front edge, said extensions forming said locking portions. The surface of the panel main body is made of semi-rigid vinyl chloride,
7. The heating panel according to claim 6 , wherein the flat sheet on the back surface of the panel main body and the engaging portion are made of soft vinyl chloride. The heating panel according to any one of claims 1 to 7 , wherein the panel main body has a connecting portion for connecting a tube to the liquid channel. A heating panel according to any one of claims 1 to 8 ;
a frame-shaped frame having an opening in the center, in which the heating panel is arranged;
a tube connected to the liquid flow path of the heating panel and held by the frame;
The panel circuit, wherein the heating panel is locked to the frame by the locking portion. A blood purification device comprising the panel circuit according to claim 9 .

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