JP2001245971A - Blood processing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize a bend and a swing of a tube for forming a blood flow passage so as to prevent defective drain of blood and damage of blood. SOLUTION: In this blood processing apparatus, a connecting tube part 18 arranged in a blood inflow/outflow part of a blood processing apparatus main body and connected to the tube for forming the blood flow passage can be turned horizontally and the tilt angle in the vertical direction can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood processing device such as a blood reservoir used in a heart-lung machine blood circuit, and more particularly to a blood processing device capable of minimizing bending and shaking of a tube for forming a blood flow path. About.

[0002]

2. Description of the Related Art In general, an extracorporeal blood circulation circuit is known as a device for circulating blood outside the body, and a blood circuit for an artificial heart and lung, a blood circuit for an artificial kidney and the like using this kind of extracorporeal blood circulation circuit. There is. For example, in an artificial heart-lung machine blood circuit, a tube forming a blood flow path is sequentially provided from a patient's blood removal port to a blood reservoir (blood reservoir), a blood pump, and a heat exchanger built-in artificial lung (hereinafter abbreviated as an artificial lung). , Connected to the arterial filter and finally to the blood outlet to the patient. Then, blood circulates through this tube, and oxygenation and carbon dioxide removal of venous blood are performed by an artificial lung.

[0003]

A blood processing device such as a blood reservoir or an artificial lung used in an extracorporeal blood circulation circuit is provided with a blood inflow portion and a blood outflow portion, and these blood inflow portions and the like are provided. A connection tube portion connected to the tube for forming a blood flow path is provided. For example,
A connection pipe provided at the blood inflow portion of the blood reservoir, a resin pipe bent obliquely upward at a predetermined angle (for example, 45 degrees) and fixedly attached to the reservoir body. It has been known.

[0004] In the case of such a conventional blood reservoir, depending on the relative position and height of the blood reservoir and the patient,
The distal end of the resin tube attached to the reservoir body could not be directed toward the blood outlet of the patient, and the tube for forming the blood flow path connecting them could be bent or twisted. If the tube for forming the blood flow path is bent, the cross-sectional area in the tube decreases, and the flow resistance when blood flows increases, which may cause poor blood removal.

[0005] Further, as a connecting tube portion provided at the blood inflow portion of the blood reservoir, a tube in which a resin tube bent at the above-mentioned predetermined inclination angle is rotatably attached to the reservoir body is also known. But in this case,
Although the angle in the direction in the horizontal plane can be changed, the angle in the direction in the vertical plane cannot be changed, and similarly to the above, there is a risk that the tube for forming the blood flow path may be bent.

On the other hand, conventionally, in order to solve the above-mentioned problem, a helical wire is previously incorporated between a connection tube provided at a blood inflow portion of a blood reservoir and a tube for forming a blood flow path. The tube and its mating connector are interposed to ensure the flexibility of the tube connection end. However, even in this case,
Although the tube is hardly bent to some extent by the strength of the wire, it cannot be avoided that a load acting to bend the tube is applied. That is, it does not basically solve the problem of tube bending. Further, the tube incorporating the helical wire is used with a certain degree of freedom, and is not used fixedly. For this reason, when blood flows in the tube for forming the blood flow path, it is impossible to avoid occurrence of shaking in the tube, and the shaking of the tube may cause blood damage such as hemolysis.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to minimize bending and shaking of a tube for forming a blood flow path to prevent poor blood removal or blood damage. It is to provide a blood processor which can be used.

[0008]

In order to solve the above-mentioned problems, a blood processing apparatus according to the present invention is provided at a blood inflow section or a blood outflow section of a blood processing apparatus main body and includes a tube for forming a blood flow path. The connection pipe section to be connected is characterized in that it can be turned and the vertical angle can be adjusted. In this case, since the connecting tube can not only pivot horizontally but also adjust the vertical angle, the tip of the connecting tube should be correctly oriented toward the device to be connected or the blood outlet of the patient. Can be. As a result, the bending of the tube for forming the blood flow path can be suppressed.

In the blood processing apparatus according to the present invention, the connection pipe is formed in a bent state, and a flange connected to the blood processing apparatus main body is attached to the connection pipe. Between the blood inflow portion or the blood outflow portion of the blood processing device main body, a wedge-shaped disk having a blood flow path in the center is provided on the flange and the blood inflow portion or the blood outflow portion of the blood processing device main body. On the other hand, it is good also as a structure rotatably attached to each. In this case, the horizontal angle of the connecting tube can be changed by rotating the flange or the wedge-shaped disk in side view. Also, by keeping the horizontal angle of the flange in which the connecting pipe portion is formed and the blood processor main body intact, and rotating only the wedge-shaped disk in a horizontal direction with respect to them, the connecting pipe portion is formed. Only the angle in the vertical direction can be changed without changing the angle in the horizontal direction. In this manner, the angle of the connecting pipe portion can be adjusted in the horizontal direction and the vertical direction only by rotating a member such as a wedge-shaped disk in side view.

[0010] The wedge-shaped disk in side view may have a handle portion protruding from the outer peripheral portion. in this case,
In rotating the wedge-shaped disk in side view, a handle portion can be used. That is, the handle can be turned by putting a finger on the handle, thereby facilitating the rotation of the disk.

Further, in the blood processing apparatus according to the present invention, the connection pipe section is formed in a curved tubular shape, and a part thereof slides on a curved tubular holding section pivotally connected to the blood processing apparatus main body. It is good also as a structure inserted as possible. In this case, since the connecting tube can not only pivot horizontally but also adjust the vertical angle, the tip of the connecting tube should be correctly oriented toward the device to be connected or the blood outlet of the patient. Can be. In addition, by smoothly pushing or pulling the connecting tube into the holding portion, only the vertical angle of the connecting tube can be changed while keeping the horizontal angle unchanged. In addition, since the angle can be adjusted by a smooth pushing or pulling operation of the connecting tube portion into the holding portion, when performing the angle adjustment by connecting a blood flow path forming tube to the connecting tube portion, The angle can be adjusted without giving the tube extra shaking, and it is possible to prevent blood circulation failure and blood cell component destruction caused by the tube extra shaking. Furthermore, since the connecting tube is formed in a curved tube along a gentle arc-shaped curve, the flow of blood in the connecting tube becomes smooth,
Since there is little turbulence in blood flow, there is no needless pressure loss and stable blood circulation is possible,
By flowing blood through a gentle curved tube, destruction of blood cells and the like in the blood can be minimized.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a blood reservoir, which is an example of the blood processor according to the present invention. The blood reservoir 1 shown here has a reservoir case (blood processor main body) 4 including a reservoir case main body 2 and a lid 3.
The reservoir case body 2 has a box shape having a protruding portion 5 protruding downward on the left side in FIG. A tubular blood outflow portion 7 communicating with the blood storage space 6 is formed below the protrusion 5. The blood outlet 7 is connected to a tube (not shown) for forming a blood flow path, and the blood outlet 7 communicates with the blood inlet of the oxygenator via this tube.
A blood supply pump is interposed in the tube for forming the blood flow path, and the blood reservoir 1 is provided by the blood supply pump.
Blood is sent to the artificial lung.

The lid 3 is fitted to the upper end of the reservoir case body 2 so as to cover the upper opening of the reservoir case body 2. In addition, a blood inflow portion 9 communicating with the blood storage space 6 is formed at a predetermined position of the lid 3. One blood inflow portion 9 is connected to, for example, a tube 10 of a blood removal line for forming an extracorporeal blood flow path (see FIG. 2), and the other blood inflow portion 9 (9a, 9b) is connected to, for example, a surgical field. Is connected to a tube (not shown) of the blood suction line.

A priming liquid inlet 30 used for injecting the priming liquid is formed on the upper surface of the blood inflow section 9. In addition, a deaeration port 31 is provided on the upper surface of the lid 3.
Are formed. The air broken by the deformer 32 is discharged to the outside through the deaeration port 31. In addition,
Air flows in and out of the blood reservoir 1 according to the increase and decrease of blood in the blood reservoir 1 are also performed through the air vent 31.

The blood inflow portion 9 will be described in detail. As shown in FIG. 2, a wedge-shaped disk 14 having a blood flow path 13 in the center is rotatably attached to the blood inflow portion 9. . The wedge-shaped disk 14 in side view
Hollow structure for weight reduction, etc.
4a and a side plate 14b. Side plate 14b
A ring-shaped projection 14bb is formed on the lower end of the side plate 1 formed on the blood inflow portion 9 of the lid 3.
Snap-fitting is performed with a plurality of (for example, 3 to 5) claws 15a attached to 5, so that once it is fitted, it can rotate freely but cannot be removed unless it is a special method. A handle portion 16 is formed on the side plate 14b so as to protrude outward.

A tube connecting member 17 is rotatably mounted on the upper part of the wedge-shaped disk 14 in side view. The tube connecting member 17 is formed by integrally forming a connecting tube 18 bent at a predetermined angle and a flange 19. A side plate 21 is formed on the flange 19, and the side plate 2
A plurality (for example, 3 to 5) of claws 21a are formed in one. The claw 21a is a wedge-shaped disk 14 as viewed from the side.
Are rotatably engaged with a ring-shaped projection 14bc formed at the upper end. In addition, seal members 22 are interposed between the blood inflow portion 9 of the lid 3 and the wedge-shaped disk 14 as viewed from the side, and between the wedge-shaped disk 14 and the tube connecting member 17 as viewed from the side. And the sealability of the joints between them is ensured.

Next, the operation of the blood reservoir 1 having the above configuration will be described. According to the blood reservoir 1, by rotating the flange 19 of the tube connecting member 17 or the wedge-shaped disk 14 in a side view, the angle of the tip 18a of the connecting tube portion 18 of the tube connecting member 17 in the horizontal plane is adjusted. Can be changed. Also, by keeping the horizontal angle (direction) of the flange 19 and the lid 3 as they are, and rotating only the wedge-shaped disk 14 in a side view with respect to them, as shown in FIGS. In addition, since the position of the inclined surface of the wedge-shaped disk 14 changes, only the vertical angle θ can be changed while keeping the horizontal angle of the connecting tube portion 18 of the tube connecting member 17.

As described above, by simply rotating the member such as the wedge-shaped disk 14 in a side view, the angle adjustment of the connecting pipe portion 18 of the tube connecting member 17 in the horizontal plane direction and the vertical plane direction can be performed. It becomes possible. Therefore, the distal end 18a of the connecting tube 18 can be accurately directed toward the device to be connected or the blood removal port of the patient, and the bending and twisting of the tube 10 for forming a blood flow path can be suppressed. . For this reason, the cross-sectional area in the tube 10 for forming a blood flow path can be kept constant, and occurrence of poor blood removal can be prevented.

Further, since the connecting tube portion 18 is fixedly attached to the lid 3 without allowing free swinging, when the blood flows through the tube 10 for forming a blood flow path, Shaking of the tube 10 can be avoided as much as possible. Therefore, blood damage such as hemolysis due to the shaking of the tube 10 can be prevented. As a result, poor blood removal and blood damage can be prevented. Further, since the handle portion 16 is formed on the outer peripheral portion of the wedge-shaped disk 14 in side view, when rotating the wedge-shaped disk 14 in side view, the handle portion 16 can be rotated with a finger. Rotating work becomes easy.

In the above embodiment, only one wedge-shaped disk 14 is provided in a side view, but a plurality of disks 14 may be provided so as to be freely rotatable with each other.

FIGS. 4 to 6 show another example of the blood processing apparatus according to the present invention. FIG. 4 is a sectional view showing a state in which the connecting tube portion 40 is pulled out from the holding portion 41, and FIGS. FIG. 6 is a cross-sectional view showing a state in which the same connection pipe section 40 is pushed into the holding section 41, and FIG. 6 is a perspective view showing a state in which the connection pipe section 40 and the holding section 41 are attached to the lid 3. In the blood processing apparatus according to this example, the connecting pipe portion 40 is formed in a curved tubular shape, and a part thereof is slidably inserted into a curved tubular holding portion 41 pivotally connected to the blood processing device main body. It has been configured.

The connecting tube portion 40 is formed into a curved tube along a substantially arc-shaped curve, and most of the connecting tube portion is inserted into the holding tube 41 and the curved tube portion is inserted into the holding tube 41. And a straight pipe portion formed to connect a tube for forming a blood flow path. A packing is provided in the vicinity of the end of the connecting tube portion 40 on the side inserted into the holding portion 41, thereby preventing liquid leakage when the bent portion of the connecting tube portion 40 is pulled out or pushed into the holding portion 41. I'm preventing.

The holding portion 41 has a slightly larger diameter than the connecting tube portion 40 and is formed into a curved tube along a similar arc-shaped curve. One end of the holding section 41 is pivotably attached to a flange of a pipe section 42 attached to the lid 3 of the blood processing apparatus main body.

In this embodiment, with the above-described configuration, the connecting pipe portion 40 can perform not only horizontal turning but also vertical angle adjustment.
Can be precisely aimed at the device to be connected or the blood outlet of the patient. Connection tube 4
By smoothly pushing or pulling out the zero holding part 41, the horizontal angle can be changed and only the vertical angle of the connecting tube part 40 can be changed. Further, in this embodiment, the angle can be adjusted by smoothly pushing or pulling out the connection tube portion 40 into the holding portion 41, so that a tube for forming a blood flow channel is connected to the connection tube portion 40. When connecting and adjusting the angle, the angle can be adjusted without giving any extra shaking to the tube, and it is possible to prevent a poor blood flow and an increased destruction of blood cell components caused by the extra shaking of the tube. Further, since the connecting tube portion 40 is formed in a curved tube along a gentle arc-shaped curve, the blood flow in the connecting tube portion 40 becomes smooth, and there is little disturbance of the blood flow, so that unnecessary pressure loss is caused. And stable blood circulation is possible, and the destruction of blood cells and the like in the blood can be minimized by passing the blood through a gentle curved tube.

In each of the above embodiments, the present invention has been described by taking the blood inflow section of the blood reservoir as an example. However, the present invention is applied only to the blood inflow section 9 of the blood reservoir 1. It can be applied to the blood outflow part 7 without being
Of course, the present invention can be applied to other devices such as a heat exchanger, an artificial lung, and various vessels for an arterial filter.

[0026]

As described above, according to the present invention, the following excellent effects can be obtained. The blood processing apparatus of the present invention is capable of turning the connecting pipe portion connected to the blood flow channel forming tube in the horizontal direction and adjusting the inclination angle in the vertical direction. It can be accurately directed toward the device to be connected or the blood outlet of the patient, and as a result, the bending of the tube for forming the blood flow path can be suppressed.

Further, in the blood processing apparatus of the present invention, the connecting pipe is formed in a bent state, and a flange connected to the blood processing apparatus main body is attached to the connecting pipe, and the flange is connected to the blood processing apparatus main body. A wedge-shaped disk having a blood flow path in the center between the blood inflow portion and the blood outflow portion is rotatably mounted on the flange and the blood inflow portion or the blood outflow portion of the blood processor main body, respectively. By simply rotating a member such as a wedge-shaped disk in a side view, it is possible to adjust the angle in the horizontal plane direction and the vertical plane direction of the connection pipe section, and the tip of the connection pipe section Can be accurately directed in the direction of the device to be connected or the blood removal port of the patient, thereby suppressing the bending and twisting of the tube for forming the blood flow path.
In addition, the connection tube section is fixedly attached to the blood processing apparatus main body without allowing free swing, so that when blood flows through the tube for forming a blood flow path, Shaking can be avoided as much as possible, so that blood damage such as hemolysis caused by shaking of the tube can be prevented.

Further, in this blood processing apparatus, the handle portion is formed on the outer periphery of the wedge-shaped disk in a side view, so that when rotating the wedge-shaped disk in a side view, it is possible to put a finger on the handle portion and turn it. The rotation work of the disk can be easily performed.

Further, in the blood processing apparatus of the present invention, the connecting pipe section is formed in a curved tubular shape, and a part thereof is slidably connected to a curved tubular holding section pivotally connected to the blood processing apparatus main body. With the inserted configuration, the connecting tube can be rotated not only horizontally but also vertically. Therefore, the tip of the connecting tube can be connected to the device to be connected or the direction of the blood outlet of the patient. Can be pointed accurately. In addition, by smoothly pushing or pulling the connecting tube into the holding portion, only the vertical angle of the connecting tube can be changed while keeping the horizontal angle unchanged. In addition, since the angle can be adjusted by a smooth pushing or pulling operation of the connecting tube portion into the holding portion, when performing the angle adjustment by connecting a blood flow path forming tube to the connecting tube portion, The angle can be adjusted without giving the tube extra shaking, and it is possible to prevent blood circulation failure and blood cell component destruction caused by the tube extra shaking. Furthermore, since the connecting tube is formed into a curved tube along a gentle arc-shaped curve, the blood flow in the connecting tube becomes smooth, and the blood flow is less disturbed, resulting in unnecessary pressure loss. In addition, stable blood circulation is possible, and destruction of blood cells and the like in blood can be minimized by flowing blood through a gentle curved tube.

[Brief description of the drawings]

FIG. 1 is a side view of a blood reservoir showing an embodiment of the present invention.

FIG. 2 is a detailed sectional view of a blood inflow portion of the blood reservoir.

FIGS. 3A and 3B are schematic diagrams illustrating the operation of the embodiment. FIG.

FIG. 4 is a cross-sectional view showing another embodiment of the present invention and showing a state in which a connecting tube is pulled out from a holding unit.

FIG. 5 is a cross-sectional view showing a state in which the same connection pipe section is pushed into a holding section.

FIG. 6 is a perspective view showing a state in which the same connecting tube portion and holding portion are attached to a lid.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 blood reservoir 2 reservoir case main body 3 lid 7 blood outflow portion 9 blood inflow portion 14 wedge-shaped disk 14bb projection 15 side plate 15a claw 16 handle portion 18 connection tube portion 19 flange 40 connection tube portion 41 holding portion

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshihiro Yamamoto 3-23-13 Hongo, Bunkyo-ku, Tokyo Izumi Kogyo Kagaku Kogyo Co., Ltd. F-term (reference) 4C077 AA02 AA03 BB06 DD13 DD24 EE01 KK25

Claims (4)

[Claims] 1. A connecting pipe portion provided at a blood inflow portion or a blood outflow portion of a blood processing device main body and connected to a tube for forming a blood flow path is capable of turning horizontally and tilting vertically. Blood treatment device characterized in that the blood treatment device can be adjusted. 2. The connecting tube portion is formed in a bent state, and a flange connected to the blood processing device main body is attached to the connecting tube portion, and the flange and the blood processing device main body are connected to each other. Between the blood inflow or blood outflow, a wedge-shaped disk with a blood flow path in the center, as viewed from the side,
2. The blood processor according to claim 1, wherein the flange and the blood processor main body are rotatably attached to a blood inflow portion or a blood outflow portion, respectively. 3. The blood processing apparatus according to claim 2, wherein a handle portion is formed on an outer peripheral portion of the wedge-shaped disk in a side view so as to protrude. 4. The connecting tube portion is formed in a curved tubular shape, and a part thereof is slidably inserted into a curved tubular holding portion pivotally connected to the blood processing device main body. The blood processor according to claim 1, wherein: