JP7803216B2 - Blood purification device - Google Patents

Description

The present invention relates to a blood purification device.

Patent Publication No. 2007-37563 (Patent Document 1) is a prior art document disclosing the configuration of a composite pump unit for a dialysis device. The composite pump unit for a dialysis device described in Patent Document 1 comprises a console panel made of synthetic resin, a composite pump unit base made of synthetic resin, a blood pump body, and a syringe pump body. The composite pump unit base has a rotor housing for the blood pump and a syringe base for the syringe pump, which are fixed to the surface of the console panel. The blood pump body is detachably attached to the rotor housing for the blood pump. The syringe pump body is detachably attached to the syringe base.

Japanese Patent Application Laid-Open No. 2007-37563

Blood purification devices used in intensive care units and other facilities require a narrow main body width to minimize footprint, while protecting the syringe pump's range of motion and allowing easy maintenance of the device's interior. In conventional blood purification devices in which a syringe pump is attached to the main body, the horizontal range of motion of the syringe pump is positioned within the width of the main body when viewed from the front, resulting in a wide main body. The blood purification device described in Patent Document 1 is equipped with a console panel in which the front and side walls are integrally formed, making it impossible to remove the side walls to easily perform maintenance on the device's interior.

The present invention was made in consideration of the above-mentioned problems, and aims to provide a blood purification device that protects the range of motion of the syringe pump while narrowing the width of the main body, and has side walls that make it easy to carry and facilitate maintenance of the device's interior.

The blood purification device according to the present invention comprises a syringe pump, a main body, a sidewall, and a guard. The syringe pump has a slide that moves the syringe plunger in the axial direction. The syringe pump is attached to the main body so that the axial direction is horizontal. The sidewall is detachably attached to the main body. The sidewall includes an outer surface and an inner surface that is stacked on the outer surface and faces the inside of the main body. The guard is attached to the outer surface of the sidewall. The slide protrudes outward from the sidewall when moved in one of the axial directions. The guard has a grippable handle. The handle faces, at a distance, the tip of the slide that protrudes outward from the sidewall when moved furthest in the axial direction. The inner surface is conductive by containing a conductive material. The outer surface is made of a material with a lighter specific gravity than the conductive material.

In one embodiment of the present invention, the main body includes a metal frame. Attached to the inner surface are a drip-proof seal member arranged along the edge of the inner surface, and a shielding elastic body that is electrically connected to the metal frame.

In one form of the present invention, the guard is constructed from an aluminum alloy.

In one embodiment of the present invention, the outer surface is made of insulating resin.

In one embodiment of the present invention, the inner surface is made of a metal plate, a metal mesh, or a pearlite plate coated with a coating of the above-mentioned conductive material.

This invention allows the width of the main body to be narrowed while protecting the range of motion of the syringe pump and making the side walls easy to carry, allowing for easy maintenance of the inside of the device.

1 is a perspective view of a blood purification apparatus according to an embodiment of the present invention, seen from above on the right side. 1 is a perspective view of a blood purification apparatus according to an embodiment of the present invention, viewed from above on the left side. 1 is a side view of a blood purification apparatus according to an embodiment of the present invention, as viewed from the right side. FIG. 4 is a plan view of the blood purification device of FIG. 3 as seen from the direction of arrow IV. FIG. 2 is an enlarged front view showing a syringe pump and a guard provided in the blood purification apparatus according to one embodiment of the present invention. 1 is a view of a side wall of a blood purification apparatus according to an embodiment of the present invention, viewed from the inner surface side. FIG. 7 is an enlarged view of a portion VII in FIG. 6. 8 is a view of the side wall of FIG. 7 as seen from the direction of arrow VIII.

A blood purification device according to one embodiment of the present invention will be described below with reference to the drawings. In the following description of the embodiment, the same or equivalent parts in the drawings will be designated by the same reference numerals, and their description will not be repeated.

The blood purification device of this embodiment can be used for any of the following procedures: Continuous Renal Replacement Therapy (CRRT), continuous hemodiafiltration (CHDF), continuous hemofiltration (CHF), continuous hemodialysis (CHD), and slow continuous ultrafiltration (SCUF). The blood purification device of this embodiment can be used in a variety of locations within a hospital, including operating rooms, intensive care units, emergency rooms, patient rooms, and preparation rooms.

Figure 1 is a perspective view of a blood purification device according to one embodiment of the present invention, viewed from above on the right side. Figure 2 is a perspective view of a blood purification device according to one embodiment of the present invention, viewed from above on the left side. Figure 3 is a side view of a blood purification device according to one embodiment of the present invention, viewed from the right side. Figure 4 is a plan view of the blood purification device of Figure 3, viewed from the direction of arrow IV. Figure 5 is a front view showing an enlarged view of a syringe pump and guard provided in a blood purification device according to one embodiment of the present invention.

As shown in Figures 1 to 5, a blood purification device 1 according to one embodiment of the present invention comprises a syringe pump 80, a main body 10, a side wall 20, and a guard 50. The syringe pump 80 has a slide 81 that moves the syringe plunger in the axial direction (X-axis direction). That is, the slide 81 is configured to be movable in the axial direction (X-axis direction) while holding the syringe plunger. The syringe pump 80 has a tip 82 on one side of the slide 81 in the axial direction (X-axis direction). The syringe pump 80 is a general-purpose syringe pump that can be installed in a dialysis device having a typical width dimension (X-axis direction).

As shown in Figures 1 to 5, the syringe pump 80 is attached to the main body 10 so that the axial direction (X-axis) is horizontal. Various devices, such as a blood pump, are provided on the front surface 11 of the main body 10. A display is located above the main body 10. The control unit of the blood purification device 1 and other components are located inside the main body 10. As shown in Figure 2, the main body 10 includes a metal frame 13. As shown in Figures 1, 2, 4, and 5, the main body 10 is formed with a recess 12 that accommodates the slide portion 81. A side wall 20 is detachably provided on the main body 10.

In the blood purification device 1 according to one embodiment of the present invention, as shown in FIG. 4, the width of the main body 10 in the X-axis direction is narrow, and a general-purpose syringe pump 80 is installed. Therefore, as shown in FIG. 5, the slide portion 81 protrudes outward from the side wall 20 when moved in one of the axial directions (X-axis direction). The width of the main body 10 in the X-axis direction is, for example, 400 mm or less.

Figure 6 is a view of the side wall of a blood purification device according to one embodiment of the present invention, viewed from the inner surface. Figure 7 is an enlarged view of section VII in Figure 6. Figure 8 is a view of the side wall in Figure 7, viewed from the direction of arrow VIII.

As shown in Figures 1, 3, 4, and 6 to 8, the side wall 20 includes an outer surface portion 30 and an inner surface portion 40 that is laminated on the outer surface portion 30 and faces the inside of the main body portion 10. In this embodiment, the outer surface portion 30 and the inner surface portion 40 are fastened together with screws. The outer surface portion 30 and the inner surface portion 40 may also be bonded together with a bonding material. The mass of the side wall 20 is, for example, 1 kg or less.

The inner surface portion 40 is conductive due to the inclusion of a conductive material. In this embodiment, the inner surface portion 40 is made of a metal plate. The conductive material in the inner surface portion 40 is a metal material such as an aluminum alloy or a copper alloy. The inner surface portion 40 may also be made of a metal mesh or a pearlite plate coated with a coating of a conductive material. The thickness of the inner surface portion 40 is, for example, 2 mm or less.

As shown in Figures 6 to 8, the inner surface 40 is attached with an adhesive or the like to a drip-proof seal member 60 arranged along the edge 41 of the inner surface 40, and to elastic shielding bodies 70, 71 that are electrically conductive to the metal frame 13. The elastic shielding bodies 70, 71 are joined to the inner surface 40 with a conductive adhesive or solder, for example, to ensure electrical continuity.

When the side wall 20 is attached to the main body 10, the drip-proof seal member 60 is compressed in the X-axis direction, filling the gap between the side wall 20 and the main body 10 and preventing droplets dripping from above from penetrating into the interior of the main body 10.

The drip-proof seal member 60 is made of a rubber material such as ethylene propylene diene rubber, vinylidene fluoride rubber, flame-retardant rubber (FR), chloroprene rubber, silicone rubber, or styrene butadiene rubber.

When the side wall 20 is attached to the main body 10, the shielding elastic bodies 70, 71 are sandwiched between the metal frame 13 and the inner surface 40 and compressed in the X-axis direction, ensuring electrical continuity between the metal frame 13 and the inner surface 40.

Shielding elastic bodies 70, 71 are shielding gaskets or shielding fingers. Shielding gaskets consist of a core material made of rubber such as urethane and a conductive film formed on the surface of the core material. Shielding fingers are made of a highly elastic conductive material such as a copper alloy.

The outer surface portion 30 is made of a material with a lighter specific gravity than the conductive material contained in the inner surface portion 40. In this embodiment, the outer surface portion 30 is made of an insulating resin such as epoxy resin. As shown in Figures 6 to 8, the edge 31 of the outer surface portion 30 protrudes toward the inside of the main body portion 10. As shown in Figure 7, the inner circumferential surface 31s of the edge 31 of the outer surface portion 30 and the outer circumferential surface 41s of the inner surface portion 40 face each other. In other words, the inner surface portion 40 is housed inside the edge 31 of the outer surface portion 30. The thickness of the portion of the outer surface portion 30 other than the edge 31 is 2 mm or more.

As shown in FIG. 6, a U-shaped portion 32 is formed on the edge 31 of the outer surface portion 30, recessed along the recess 12 of the main body portion 10. In other words, a U-shaped portion 32 is formed on the edge of the side wall 20, recessed along the recess 12 of the main body portion 10.

As shown in Figures 1 to 6, the guard 50 is provided on the outer surface 30 of the side wall 20. The guard 50 has a grippable handle 51. In other words, the handle 51 is provided on the outer surface 30 of the side wall 20. In this embodiment, the guard 50 is made of a highly rigid and lightweight material such as an aluminum alloy.

As shown in FIG. 5 , the guard 50 faces, at a distance, the tip 82 of the slide portion 81 that protrudes outward from the side wall 20 when it is moved furthest in one of the axial directions (X-axis direction). Specifically, the handle portion 51 faces, at a distance, the tip 82 of the slide portion 81 that protrudes outward from the side wall 20 when it is moved furthest in one of the axial directions (X-axis direction). This allows the guard 50 to surround and protect the range of motion of the syringe pump 80.

As shown in Figures 1 and 3 to 5, the guard 50 has a connection portion 52 that contacts the side wall 20 along the U-shaped portion 32 at the edge of the side wall 20. As shown in Figure 3, the handle portion 51 extends so as to linearly connect both ends 52e of the U-shaped connection portion 52 when viewed in a direction perpendicular to the side wall 20 (the X-axis direction). In this embodiment, as shown in Figure 6, the connection portion 52 is fixed to the outer surface portion 30 with screws.

As shown in Figures 3 and 4, a groove 53 extending in the vertical direction (Z-axis direction) is formed on the contact surface 52s of the connection portion 52 with the side wall 20. This forms a drainage groove that penetrates vertically between the outer surface portion 30 and the connection portion 52.

As shown in FIG. 6, the shielding elastic body 71 is positioned near the handle portion 51 when viewed from a direction perpendicular to the inner surface portion 40 (X-axis direction). In this embodiment, the shielding elastic body 71 is positioned along the connection portion 52 when viewed from a direction perpendicular to the inner surface portion 40 (X-axis direction).

In the blood purification device 1 according to one embodiment of the present invention, the syringe pump 80 has a slide portion 81 that moves the syringe plunger in the axial direction (X-axis direction). The syringe pump 80 is attached to the main body 10 so that the axial direction (X-axis direction) is horizontal. The side wall 20 is detachably attached to the main body 10. The slide portion 81 protrudes outward from the side wall 20 when moved in one of the axial directions (X-axis direction). This allows the width of the main body 10 to be narrowed, while the side wall 20 can be removed for easy maintenance of the inside of the device. Furthermore, by installing a general-purpose syringe pump 80, the blood purification device 1 can be manufactured inexpensively.

In a blood purification device 1 according to one embodiment of the present invention, a guard 50 is provided on the side wall 20. The guard 50 faces, at a distance, the tip 82 of the slide portion 81 that protrudes outward from the side wall 20 when it is moved furthest in one of the axial directions (X-axis direction). This allows the guard 50 to surround and protect the syringe pump 80's range of motion.

In the blood purification device 1 according to one embodiment of the present invention, the guard 50 has a grippable handle 51. The handle 51 faces the tip 82 of the slide 81. This allows the side wall 20 to be carried by gripping the handle 51, which is positioned to protect the range of motion of the syringe pump 80. This protects the range of motion of the syringe pump 80 and also makes the side wall 20 easier to carry, facilitating maintenance of the inside of the device.

In a blood purification device 1 according to one embodiment of the present invention, a recess 12 for accommodating a slide portion 81 is formed in the main body 10. A U-shaped portion 32 is formed on the edge of the side wall 20, recessed along the recess 12. The guard 50 has a connection portion 52 that contacts the side wall 20 along the U-shaped portion 32. The handle portion 51 extends so as to linearly connect both ends 52e of the U-shaped connection portion 52 when viewed from a direction perpendicular to the side wall 20 (the X-axis direction). As a result, the handle portion 51 extends linearly, making it easy to grip, while preventing the handle portion 51 from protruding above the main body 10.

In the blood purification device 1 according to one embodiment of the present invention, a vertically extending groove 53 is formed on the contact surface 52s of the connecting part 52 with the side wall 20. This forms a drainage groove that penetrates vertically between the outer surface part 30 and the connecting part 52, allowing liquid droplets that drip from above between the outer surface part 30 and the connecting part 52 to be discharged through the drainage groove.

In the blood purification device 1 according to one embodiment of the present invention, the side wall 20 includes an outer surface portion 30 and an inner surface portion 40 that is laminated on the outer surface portion 30 and faces the inside of the main body portion 10. The inner surface portion 40 is conductive by containing a conductive material. The outer surface portion 30 is made of a material with a lighter specific gravity than the conductive material. This makes the side wall 20 lighter than when the side wall is made of metal plate alone, making the side wall 20 easier to carry and facilitating maintenance of the inside of the device.

In a blood purification device 1 according to one embodiment of the present invention, the main body 10 includes a metal frame 13. Attached to the inner surface 40 are a drip-proof seal member 60 arranged along the edge 41 of the inner surface 40, and shielding elastic bodies 70, 71 that are electrically conductive with the metal frame 13. As a result, the drip-proof seal member 60 prevents liquid droplets from penetrating into the main body 10, while the shielding elastic bodies 70, 71 ensure electrical conductivity between the inner surface 40 and the metal frame 13, forming an electromagnetic shield and suppressing the generation of electromagnetic interference.

In the blood purification device 1 according to one embodiment of the present invention, the guard 50 is made of an aluminum alloy. This reduces the weight of the guard 50 while ensuring the rigidity of the handle portion 51, making the side wall 20 easier to carry and facilitating maintenance of the device's interior.

In the blood purification device 1 according to one embodiment of the present invention, the outer surface portion 30 is made of insulating resin. This reduces the weight of the side wall 20 and prevents electric shock through the side wall 20.

In the blood purification device 1 according to one embodiment of the present invention, the inner surface 40 is made of a metal plate, a metal mesh, or a pearlite plate coated with a coating of the above-mentioned conductive material. This ensures the strength of the side wall 20 while forming an electromagnetic shielding surface and suppressing the generation of electromagnetic interference.

In the blood purification device 1 according to one embodiment of the present invention, the edge 31 of the outer surface portion 30 protrudes toward the inside of the main body portion 10. The inner circumferential surface 31s of the edge 31 of the outer surface portion 30 and the outer circumferential surface 41s of the inner surface portion 40 face each other. This further reduces the risk of electric shock through the side wall 20.

In the blood purification device 1 according to one embodiment of the present invention, a portion of the shield elastic body 71 is positioned near the handle portion 51 when viewed from a direction perpendicular to the inner surface portion 40 (the X-axis direction). This prevents electromagnetic interference caused by static electricity entering from around the handle portion 51 when the device is gripped.

(Addendum)
It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

(Section 1)
a syringe pump having a slide portion that moves a plunger of the syringe in an axial direction;
a main body to which the syringe pump is attached so that the axial direction is horizontal;
a sidewall that is detachably attached to the main body portion and includes an outer surface portion and an inner surface portion that is stacked on the outer surface portion and faces the inside of the main body portion;
a guard provided on the outer surface portion of the side wall,
the slide portion protrudes outward from the side wall when moved in one axial direction,
The guard has a grippable handle,
the handle portion faces, with a gap therebetween, a tip end of the sliding portion that protrudes outward from the side wall when the sliding portion is moved furthest in the one axial direction;
the inner surface portion contains a conductive material and is thereby conductive;
The blood purification device, wherein the outer surface portion is made of a material having a specific gravity lighter than that of the conductive material.

(Section 2)
the main body includes a metal frame;
2. The blood purification device according to claim 1, wherein the inner surface is provided with a drip-proof sealing member arranged along the edge of the inner surface, and a shielding elastic body that is electrically connected to the metal frame.

(Section 3)
3. The blood purification apparatus according to claim 2, wherein the guard is made of an aluminum alloy.

(Section 4)
4. The blood purification device according to any one of claims 1 to 3, wherein the outer surface portion is made of an insulating resin.

(Section 5)
5. The blood purification device according to any one of claims 1 to 4, wherein the inner surface is made of a metal plate, a metal mesh, or a perlite plate coated with a coating of the conductive material.

The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications that are equivalent in meaning to and within the scope of the claims.

1 Blood purification device, 10 Main body, 11 Front, 12 Recess, 13 Metal frame, 20 Side wall, 30 Outer surface, 31, 41 Edge, 31s Inner peripheral surface, 32 U-shaped portion, 40 Inner surface, 41s Outer peripheral surface, 50 Guard, 51 Handle portion, 52 Connection portion, 52e Both ends, 52s Contact surface, 53 Groove, 60 Drip-proof seal member, 70, 71 Shield elastic body, 80 Syringe pump, 81 Slide portion, 82 Tip.

Claims (5)

a syringe pump having a slide portion that moves a plunger of the syringe in an axial direction;
a main body to which the syringe pump is attached so that the axial direction is horizontal;
a sidewall that is detachably attached to the main body portion and includes an outer surface portion and an inner surface portion that is stacked on the outer surface portion and faces the inside of the main body portion;
a guard provided on the outer surface portion of the side wall,
the slide portion protrudes outward from the side wall when moved in one axial direction,
The guard has a grippable handle,
the handle portion faces, with a gap therebetween, a tip end of the sliding portion that protrudes outward from the side wall when the sliding portion is moved furthest in the one axial direction;
the inner surface portion contains a conductive material and is thereby conductive;
The blood purification device, wherein the outer surface portion is made of a material having a specific gravity lighter than that of the conductive material. the main body includes a metal frame;
2. The blood purification apparatus according to claim 1, wherein the inner surface is provided with a drip-proof seal member disposed along the edge of the inner surface, and a shielding elastic body electrically connected to the metal frame. The blood purification device of claim 1, wherein the guard is made of an aluminum alloy. The blood purification device of claim 1, wherein the outer surface is made of insulating resin. 2. The blood purification apparatus according to claim 1, wherein the inner surface is made of a metal plate, a metal mesh, or a perlite plate coated with a coating of the conductive material.