JP4369605B2 - Suction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an internal fluid (including all liquids and particulates, for example, blood components and blood component cleaning solutions) that is housed in a medical device such as a blood (infusion) bag, a blood circuit, and the like and is blocked from outside air. The present invention relates to a suction device capable of sucking and collecting a chemical solution or the like in another collection container different from the medical device.
More specifically, a large-capacity collection container (for example, a flexible and bag-like container that is blocked from outside air) connected to the medical device by a tube is placed in a decompression chamber and placed under negative pressure, thereby providing medical care. This is a suction device capable of sucking and collecting the fluid in the tool into the collection container.
Hereinafter, as an example, a case will be described in which the supernatant recovery and the recovery of the raw plasma are performed in the supernatant removal operation during WBC (washed red blood cell preparation) adjustment.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Currently, WBC (washed erythrocyte preparation) preparation is performed as follows.
(1) Add physiological saline as a washing solution to the blood bag containing the pre-adjusted blood product.
(2) Thoroughly mix the blood and the washing solution by tumbling the blood bag.
(3) Centrifugation into erythrocytes and supernatant (except for erythrocytes becomes supernatant) with a centrifuge.
(4) Connect the blood bag and the collection container with a tube, and fix it with a separation stand.
(5) Place the collection container at a position lower than the blood bag, and transfer the supernatant and unremoved buffy coat to the collection container by a drop.
[0003]
However, in the transfer by the head, the flow rate of the liquid to be removed is slow, and the work takes time and is not efficient.
Also, at the end of the work, the tube is closed with Koch (or scissors) that is held in the hand, so the operator's one hand is obstructed and the work is performed to separate the supernatant and red blood cells precisely (when transferring the supernatant, At the end, it was difficult to carry out by holding the mouth of the bag by hand and transferring the supernatant little by little so as not to transfer red blood cells).
Therefore, as a result of intensive studies to solve the above problems, the present inventor has reached the following invention.
[0004]
[Means for Solving the Problems]
[1] The present invention has a suction device body (2),
Place the lid (3) on the top surface of the suction device body (2),
A partition wall (5) is disposed in the suction device body (2),
A first chamber (4) surrounded by the top surface of the suction device body (2), the lid (3) , and the partition wall (5) ;
Comprising the suction device body (2) and a second chamber surrounded by the bottom surface of the partition wall (5) ,
The first chamber (4) is a decompression chamber, and in the first chamber (4), a collection container receiving tray (6), a means for detecting a full water amount of the collection container, and a tube clamping means are arranged. ,
In the second chamber, the pressure reducing means of the first chamber (4) and the driving means of the suction device are arranged,
The means for detecting the amount of water in the recovery container includes an optical sensor (15) for detecting a relatively small capacity, an optical sensor (16) for detecting a relatively large capacity, and a capacity sensor changeover switch (23) for the recovery container. )
Each of the optical sensors (15, 16) includes a pair of light projecting units (15A, 16A) and a light receiving unit (15B, 16B).
Each of the optical sensors (15, 16) is attached to a sensor height position adjusting jig (14) at a position higher than the tray (6),
Attaching a foot switch connector (26), a collection container capacity sensor changeover switch (23), and a collection container full water amount indicator lamp (21) to the suction device body (2),
A suction device (1) is provided in which a foot switch (30) is connected to the foot switch connector (26) .
[2] In the present invention, the decompression means of the first chamber (4) includes a decompression pump (17) and a pressure release valve (18) connected to the decompression pump (17) via a decompression pipe (20). And a pressure adjusting part (19),
The drive means of the suction device comprises a drive control unit (7) and a power unit (8),
The tube clamp means provides the suction device (1) according to [1], which includes a tube clamp (11) and a drive mechanism (12) of the tube clamp .
[ 3 ] The present invention provides a means for detecting the full water amount of the recovery container, an abnormality in the control mechanism of each means, and a means for notifying the full water amount of the recovery container and an abnormality in the control mechanism of each means; The suction device (1) according to [1] or [2], comprising:
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1 is a front view showing an example of the suction device of the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a rear view of FIG. 1, FIG. 4 is a cross-sectional view of FIG. FIG. 6 is a schematic view of a foot switch connected to the suction device of the present invention [(A) is a front view, (B) is a top view], and FIG. 7 is a block diagram of the suction device of the present invention. It is.
[0006]
In the suction device 1 of the present invention, a lid 3 is disposed on the top surface of the suction device body 2, a partition wall 5 is disposed in the suction device body 2, and the suction device body 2, the lid 3, and the partition wall 5 are arranged. the first chamber as a vacuum chamber in a space surrounded by the top face 4 (hereinafter, simply "decompression chamber 4" hereinafter) is formed, of those the decompression chamber full level of the collection container and receiving plate 6 of the collection container in the 4 A detection means and a tube clamp means are arranged, and a decompression means of the decompression chamber 4 and a drive means of the suction device are arranged in a space (second chamber) surrounded by the bottom surface of the suction device body 2 and the partition wall 5. It is comprised by.
[0007]
In the present invention, the decompression means of the decompression chamber 4 is composed of a decompression pump 17, a pressure release valve 18 connected to the decompression pump 17 via a decompression pipe 20, and a pressure adjustment unit 19.
The driving means of the suction device is composed of a drive control unit 7 and a power unit 8 (also called a power source).
The means for detecting the full amount of water in the collection container includes optical sensors 15 and 16 and a capacity sensor changeover switch 23 for the collection container.
The tube clamp means comprises a tube clamp 11 and a tube clamp drive mechanism 12.
[0008]
The space of the decompression chamber 4 has a large capacity of 7 to 15 liters and can be sucked from 0 to a maximum negative pressure of −400 mmHg by the decompression pump 17. Between the top surface of the suction device main body 2 and the bottom surface of the lid 3, a negative pressure maintaining packing 13 for maintaining the negative pressure in the decompression chamber 4 at the negative pressure is disposed.
The drive control unit 7 includes a CPU that controls each of the means. The CPU has a built-in rewritable memory that stores a control program, and the program can be rewritten while the suction device body 2 is attached. Can be done. Further, a signal from the foot switch 30 is detected, and an operation command to the decompression pump 17 and the tube clamp drive mechanism 12 is issued.
[0009]
The decompression pipe 20 communicates with the decompression chamber 4 through the vent hole 5A of the partition wall 5 and drives the decompression pump 17 to make the inside of the decompression chamber 4 have a negative pressure. The negative pressure level in the decompression chamber 4 is adjusted by the pressure release valve 18 (opens and maintains the negative pressure state) and the pressure adjustment unit 19 (adjusts the negative pressure in the decompression chamber 4).
The receiving tray 6 is disposed on the top surface of the partition wall 5 and is mounted with a flexible bag-like collection container with a flexible liquid introduction tube.
The tube clamp 11 is composed of a movable portion 11A and a fixed portion 11B, and the liquid introduction tube is disposed between them, and the liquid introduction tube is driven by a tube clamp drive mechanism 12 made of, for example, a cylinder or a solenoid. Open and close. The tube clamp drive mechanism 12 is disposed at a position higher than the partition wall 5 on the left (or right) inner wall surface of the suction device body 2 in the lateral direction.
The optical sensors 15 and 16 are sensors for detecting different capacities of the collection containers (for example, the optical sensor 15 has a relatively small capacity (1 liter) and the optical sensor 16 has a relatively large capacity (2 liters)). , And a pair of light projecting portions 15A and 16A and light receiving portions 15B and 16B. These are mounted on the sensor height position adjusting jig 14 and arranged at a position higher than the tray 6 on the front and rear inner wall surfaces in the longitudinal direction of the suction device body 2. Furthermore, the optical sensor 15 that detects a relatively small capacity is disposed at a position lower than the sensor 16 that detects a relatively large capacity. By using infrared light for the optical sensors 15 and 16, the light receiving portions 15B and 16B can be made less susceptible to external light. The arrangement of the light projecting portions 15A and 16A and the light receiving portions 15B and 16B of the optical sensors 15 and 16 is reversed or the angle is changed so that the optical axes do not overlap with each other. The optical sensors 15 and 16 can be prevented from interfering with each other by modulating the attached light and using optical sensors 15 and 16 having different wavelengths, thereby improving the sensitivity of the optical sensors 15 and 16. it can.
[0010]
A tube mounting portion 9 having a tube mounting groove 10, a foot switch connector 26, and an embedded handle 27 are disposed on the front surface (or side portion) of the suction device main body 2. More specifically, the tube mounting portion 9 is arranged at the upper front portion of the suction device body 2 and between the top surface side portion of the suction device body 2 and the bottom surface side portion of the lid 3.
Also, on the right side surface (or side part) of the suction device main body 2, a collection container full amount indicator lamp 21, an operation start switch 22, a collection container capacity sensor switch 23, and a lid closing fixture 28 are arranged. Yes. More specifically, the lid closing fixture 28 is composed of a convex portion and a concave portion called a ball catch, the convex portion being attached to the bottom surface of the lid 3, and the concave portion being attached to the upper side surface of the suction device body 2. Yes.
Further, the suction device main body 2 and a hinge 31 of the lid 3 are arranged on the upper left side (also referred to as a side portion) of the suction device main body 2. The hinge 31 has a built-in damper mechanism to alleviate the sudden opening / closing operation of the lid 3 and improve the safety of the operator.
A power switch 24, a power input unit 25, and an embedded handle 27 are disposed on the back surface of the suction device body 2. A caster 32 and an adjuster 33 are disposed on the bottom surface of the suction device main body 2.
In the suction device 1 of the present invention, the arrangement positions of the respective parts on the suction device main body 2 are not specified as described above, and can be changed as necessary.
A foot switch 30 is connected to the foot switch connector 26 via a foot switch cord 29.
Further, the suction device 1 of the present invention includes means for detecting a full water amount in the recovery container and an abnormality in the control mechanism of each means (for example, optical sensors 15 and 16 for detecting full water, an operation start switch 22, a foot switch 30 And a means for notifying the operator of the abnormality (for example, a full water amount indicator light of the recovery container). 21 and the full water and abnormality notification buzzer 34).
[0011]
Next, an example of the operation method of the suction device 1 of the present invention will be described.
A blood bag in which blood products have been washed and separated in the same manner as in the prior art and a collection container (for example, 1 liter in capacity) are connected by a tube. The power switch 24 is turned on, and the collection container is placed on the tray 6 of the decompression chamber 4 of the suction device 1 that has supplied power from the power unit 8 to the drive control unit 7, and the tube is placed in the groove 10 of the tube mounting unit 9. After mounting, the lid 3 is closed and the inside of the decompression chamber 4 is sealed. At this time, the tube clamp 11 is in an open state.
After the capacity sensor changeover switch 23 of the recovery container is set to 1 liter, the operation start switch 22 is turned on to supply power to the decompression pump 17, and the inside of the decompression chamber 4 is set to a negative pressure. At this time, the tube clamp is closed. (The fluid flow path of the tube is blocked.) Next, when the foot switch 30 is stepped on to open the tube clamp 11 to open the fluid flow path of the tube, the suction of the supernatant into the collection container is started. . (When the foot stepping on the foot switch 30 is released, the tube clamp 11 is closed, and the suction of the supernatant can be interrupted.) From this, the collection container is filled with the supernatant and gradually begins to expand. .
When a predetermined amount of supernatant is aspirated into the recovery container, the uppermost end of the expansion part of the recovery container touches the optical axis P of the optical sensor 15, and the infrared rays emitted from the light projecting part 15A are blocked. The As a result, a detection signal is transmitted from the light receiving unit 15B to the drive control unit 7, and is notified to the operator by lighting the full water amount indicator lamp 21 of the collection container and a buzzer of an alarm device (full water and abnormality notification buzzer 34). The At this time, the tube clamp 11 is automatically closed to block the fluid flow path of the tube. When the operation start switch 22 is turned off, the negative pressure in the decompression chamber 4 is released, and the tube clamp 11 is automatically opened until the decompression chamber 4 returns to atmospheric pressure or at a time designated by the operator. .
Furthermore, the suction device 1 of the present invention forcibly turns the tube clamp 11 when the power is turned off when the power is on, when the power is shut off unexpectedly, or when the operator misoperates the switches. It is possible to provide a mechanism for closing the tube and shutting off the fluid flow path of the tube to ensure safety.
A plurality of collection containers having different capacities can be sucked and collected at the same time as described above.
[0012]
[Effects of the invention]
In the suction device 1 of the present invention, (1) by applying a negative pressure of -400 mmHg at the maximum to the collection container, the fluid suction speed can be increased and the collection can be performed in a short time. (2) The tube clamp 11 is electrically driven and its operation is controlled by the foot switch 30 so that the operator's hands are freed and the operation of precisely separating the supernatant and erythrocytes is easily performed. be able to. (3) The capacity of the recovery container can be selected and used by the changeover switch 23 such as a relatively small capacity (for example, 1 liter) and a relatively large capacity (for example, 2 liters). Further, by adjusting the mounting height of the optical sensors 15 and 16, the type (capacity, single container or multiple containers) of the collection container can be selected and used. In addition, it is possible to know the full water condition in the middle and at the end of the collection container.
[Brief description of the drawings]
1 is a front view of the suction device of the present invention. FIG. 2 is a right side view of FIG. 1. FIG. 3 is a rear view of FIG. 1. FIG. 4 is a cross-sectional view of FIG. FIG. 6 is a schematic view of a foot switch connected to the suction device of the present invention. FIG. 7 is a block diagram of the suction device of the present invention.
1 Suction Device 2 Suction Device Body (Main Body)
3 Lid 4 Decompression chamber (first chamber)
5 Bulkhead for decompression chamber
5A Vent 6 Receptacle receiving tray 7 Drive control unit 8 Power unit 9 Tube mounting unit 10 Groove 11 Tube clamp 11A Movable unit 11B Fixed unit 12 Tube clamp drive mechanism 13 Negative pressure maintenance packing 14 Sensor height position adjustment jig 15 Light sensor (for 1 liter)
16 Light sensor (for 2 liters)
15A, 16A Light projecting unit 15B, 16B Light receiving unit 17 Pressure reducing pump 18 Pressure release valve 19 Pressure adjusting unit 20 Pressure reducing piping 21 Full capacity indicator lamp (indicator lamp) of recovery container
22 Operation start switch 23 Collection container capacity sensor switch (sensor switch)
24 Power switch 25 Power input unit 26 Foot switch connector 27 Implantable handle 28 Lid closure fixture 29 Foot switch cord 30 Foot switch 31 Hinge 32 Caster 33 Adjuster 34 Full water and abnormal alarm buzzer

Claims (3)

A suction device body (2),
Place the lid (3) on the top surface of the suction device body (2),
A partition wall (5) is disposed in the suction device body (2),
A first chamber (4) surrounded by the top surface of the suction device body (2), the lid (3) , and the partition wall (5) ;
Comprising the suction device body (2) and a second chamber surrounded by the bottom surface of the partition wall (5) ,
The first chamber (4) is a decompression chamber, and in the first chamber (4), a collection container receiving tray (6), a means for detecting a full water amount of the collection container, and a tube clamping means are arranged. ,
In the second chamber, the pressure reducing means of the first chamber (4) and the driving means of the suction device are arranged,
The means for detecting the amount of water in the recovery container includes an optical sensor (15) for detecting a relatively small capacity, an optical sensor (16) for detecting a relatively large capacity, and a capacity sensor changeover switch (23) for the recovery container. )
Each of the optical sensors (15, 16) includes a pair of light projecting units (15A, 16A) and a light receiving unit (15B, 16B).
Each of the optical sensors (15, 16) is attached to a sensor height position adjusting jig (14) at a position higher than the tray (6),
Attaching a foot switch connector (26), a collection container capacity sensor changeover switch (23), and a collection container full water amount indicator lamp (21) to the suction device body (2),
A suction device (1) , wherein a foot switch (30) is connected to the foot switch connector (26 ). The pressure reducing means of the first chamber (4) includes a pressure reducing pump (17), a pressure release valve (18) connected to the pressure reducing pump (17) via a pressure reducing pipe (20), and a pressure adjusting unit (19 )
The drive means of the suction device comprises a drive control unit (7) and a power unit (8),
The suction device (1) according to claim 1, wherein the tube clamp means comprises a tube clamp (11) and a drive mechanism (12) for the tube clamp .   And a means for detecting an abnormality of a control mechanism of each means, a means for detecting an abnormality of a control mechanism of each means, and a means for notifying an abnormality of the control mechanism of each means. The suction device (1) according to claim 1 or 2.

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