JP2016019614A - Frozen plasma thawing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frozen plasma thawing device for thawing frozen plasma put in a frozen plasma bag which avoids the risk that germs are mixed into the plasma, is easy to clean, and shortens the thawing time by enhancing heat transfer efficiency.SOLUTION: A frozen plasma thawing device includes: a suspension part 10 which is equipped with a shaft 11 horizontally disposed to suspend a frozen plasma bag, and which supports the shaft 11 in a cantilevered manner; and a main body part 20 including a pair of walls 22A, 22B which are installed upright so as to face each other and form a channel 21 where a frozen plasma bag 2 suspended from the shaft 11 is entered, and in the upper and lower parts of which air inlets 221A, 221B and air outlets 222A, 222B, which are opened toward the channel 21, are formed respectively. The suspension part 10 is equipped with a swing mechanism for swinging the shaft 11 with a motor 12, and the main body part 20 is equipped with air flow passages 23A, 23B, fans 24A, 24B and heaters 25A, 25B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a frozen plasma thawing apparatus for thawing frozen plasma enclosed in a frozen plasma bag.

  At present, as a method for thawing frozen plasma, a method of thawing by immersing a frozen plasma bag in warm water filled in a constant temperature water bath is mainly used (for example, see Patent Document 1). However, the method of thawing by immersing in warm water can shorten the time required for thawing, but has many problems as follows.

  As one of the problems, there is contamination of germs by warm water, and each medical institution has questioned the safety of providing frozen plasma. Furthermore, when thawing, care must be taken so that the connection part with the blood transfusion device is not contaminated with germs, and it is a reality that a separate bag is used to make a double bag and put into warm water.

  In addition, when hot water is used, cleaning during and after use is very difficult. There are many environments where hot water cannot be easily replaced because water is used at the site, and mucous chalk remains, especially for dirt attached to heaters, motors and sensors for stirring hot water, etc. I can't clean it.

  Therefore, as a thawing method that does not use hot water, the frozen plasma bag is sandwiched from above and below with a plate or a bag filled with a heat medium, the frozen plasma bag is warmed through the plate with upper and lower heaters, and the frozen plasma bag is sandwiched from above and below. A method of thawing by swinging a part or the whole of the structure has been proposed (Patent Documents 2 and 3).

  Here, the plasma in the frozen plasma bag is frozen at, for example, −35 ° C., etc., and during thawing, water droplets adhere to the outer surface of the frozen plasma bag and become wet. In the methods proposed in Patent Documents 2 and 3, the frozen plasma bag is sandwiched from above and below by a plate or the like, so that the plate and the like are in a wet state, and in combination with warming for thawing, is a hotbed for propagation of miscellaneous bacteria. There is a problem that cleaning and disinfection are difficult.

  In addition, the frozen plasma bag is troublesome to handle, and when it is frozen at −30 ° C. or lower, the end portion of the frozen plasma bag is easily damaged, and in some cases, the plasma may leak from the damaged portion. Also in this respect, it is dangerous to sandwich the frozen plasma bag with a plate or the like.

  Furthermore, a method has been proposed in which a frozen plasma bag is suspended and thawed by blowing hot air from below (Patent Document 4).

  In the case of this method, the condensation on the outer surface of the frozen plasma bag falls down, and it is less likely to adhere to the frozen plasma bag again, and is safe in terms of contamination by germs. However, warm air is less efficient in transferring heat to the frozen plasma bag than in the case where it is immersed in warm water or sandwiched between plates, etc., and it takes too much time for thawing, which may lead to deterioration in work efficiency.

  In addition, frozen plasma has a property that when it is thawed at a temperature exceeding 37 ° C., it has a decrease in clotting factor activity, and at 50 ° C. or more, it has a property of causing clotting due to protein denaturation. It is also dangerous to increase the temperature of the hot air and defrost it.

JP 2009-50316 A JP2013-252204A JP 2007-61245 A JP 2001-218817 A

  In view of the above circumstances, the present invention provides a frozen plasma thawing device that avoids the risk of contamination and ensures easy cleaning, and further improves the heat transfer efficiency to shorten the thawing time. Objective.

The frozen plasma thawing device of the present invention that achieves the above object is
A suspension unit that is horizontally disposed and has a shaft for hanging a frozen plasma bag, and supports the shaft in a cantilever shape;
A pair of walls that stand up against each other and form a groove into which a frozen plasma bag suspended from a shaft enters, both at the lower and upper parts of the pair of walls, both open toward the groove A main body formed with an air inlet and an air outlet, respectively,
The hanging portion includes a motor, and includes a swing mechanism that swings the shaft in the extending direction of the shaft with the motor.
A main body is provided corresponding to each of the pair of walls,
An air flow path connecting the air inlet and the outlet;
A fan that sucks air in the groove from the air inlet and blows it out from the air outlet;
And a heater for heating the air flowing in the air flow path.

  As the plasma in the frozen plasma bag begins to thaw, the frozen mass floats on the thawed plasma. In the frozen plasma thawing apparatus of the present invention, an air outlet is provided in the upper part of the wall so as to blow warm air toward the frozen mass. For this reason, heat transfer efficiency is improved compared with the method of blowing warm air from the bottom. In addition, since the shaft that suspends the frozen plasma bag is swung, it is frozen by rocking while preventing contamination of bacteria compared to the case of rocking with a plate as described in Patent Documents 2 and 3 above. The thawed plasma in the plasma bag is agitated to further increase heat transfer efficiency.

  Here, in the frozen plasma thawing apparatus of the present invention, it is preferable to further include a mesh-shaped thawing-dedicated net that accommodates the frozen plasma bag and is suspended from the shaft.

  In the aforementioned Patent Document 3, the frozen plasma bag is directly hung by a hook. On the other hand, in this aspect, the thawing-dedicated net is provided, the frozen plasma bag is put in the thawing-dedicated net, and the thawing-dedicated net is suspended from the shaft. As a result, the risk of dropping the frozen plasma bag can be greatly reduced.

  Further, in the frozen plasma thawing device of the present invention, the groove is a groove having a shape that is open on both the upper surface and the front surface of the main body portion and is partitioned by a pair of walls, and the shaft is the rear surface of the main body portion Preferably, the shaft is supported in the shape of a cantilever on the side and is directly above the groove and extends horizontally above the opening on the upper surface side of the main body portion toward the front surface side of the main body portion.

  If the structure of this aspect is provided, the operation | work of attachment (hanging) and removal of a frozen plasma bag can be performed from the front surface of this frozen plasma thawing | decompression apparatus, and workability | operativity improves.

  According to the frozen plasma thawing device of the present invention, contamination with germs can be avoided and easy cleaning can be ensured, and the heat transfer efficiency can be increased to shorten the thawing time.

It is a top view of the frozen plasma thawing device as one embodiment of the present invention. It is a front view of the frozen plasma thawing device as one embodiment of the present invention. It is a right view of the frozen plasma thawing device as one embodiment of the present invention. It is the figure which showed the frozen plasma bag accommodated in the net | network only for thawing | decompression. It is the schematic diagram which showed the internal structure of the hanging part.

  Embodiments of the present invention will be described below.

  1, 2 and 3 are a top view, a front view, and a right side view, respectively, of a frozen plasma thawing apparatus as one embodiment of the present invention.

  The frozen plasma disassembling apparatus 1 includes a hanging part 10 and a main body part 20.

  The hanging part 10 includes a shaft 11 arranged horizontally. The shaft 11 is supported in a cantilever shape on the back side of the main body 20. The shaft 11 is responsible for suspending the frozen plasma bag 2 (see FIG. 2) in a state of being accommodated in the thawing-dedicated net 30. Details of the decompression-dedicated net 30 will be described later.

  The suspension unit 10 includes a motor 12 and a swing mechanism 13 that swings the shaft 11 with the motor 12. The direction of oscillation of the shaft 11 is the direction indicated by the arrow FR in FIGS. Details of the swing mechanism 13 will be described later.

  The main body 20 is provided with a pair of walls 22A and 22B so that a groove 21 into which a frozen plasma bag suspended from the shaft 11 is formed. These walls 22A and 22B are separated so as not to contact the thawing dedicated net 30 containing the frozen plasma bag 2 suspended in the groove 21, and the suspended thawing dedicated net 30 containing the frozen plasma bag 2 is connected to the wall 22A, 22B. They are standing and facing each other.

  Here, air inlets 221A and 221B and air outlets 222A and 222B that open toward the groove 21 are formed in the lower and upper portions of the pair of walls 22A and 22B, respectively. For example, the air outlets 222A and 222B have dimensions of 30 mm in length and 190 mm in width. The main body 20 is provided with air flow paths 23A and 23B that connect the air inlets 221A and 221B and the air outlets 222A and 222B. Fans 24A and 24B including fan motors 241A and 241B are provided in the lower portions of the air flow paths 23A and 23B. These fans 24A and 24B have a role of sucking the air in the groove 21 from the air suction ports 221A and 221B, and passing the air through the air flow paths 23A and 23B to blow out the air into the groove 21 from the air outlets 222A and 222B. I'm in charge. Here, in the frozen plasma thawing apparatus 1 of the present embodiment, guide ducts 231A and 231B for guiding air are attached to the air outlets 222A and 222B so that air is blown obliquely downward into the groove 21. The air sent out by the fans 24A, 24B is blown obliquely downward into the groove 21. The blown air is blown onto the upper part of the frozen plasma bag 2 that is housed in the thawing net 30 and suspended. An arrow C in FIG. 2 represents the flow of air.

  In addition to the fans 24A and 24B, heaters 25A and 25B and temperature sensors 26A and 26B are provided in the air flow paths 23A and 23B. The heaters 25A and 25B have a role of heating the air sent into the air flow paths 23A and 23B by the fans 24A and 24B. The sensors 26A and 26B are arranged in the vicinity of the air outlets 222A and 222B in the air flow paths 23A and 23B, and measure the temperature of the air blown from the air outlets 222A and 222B. The temperature of the air measured by each sensor 26A, 26B is input to each temperature controller 27A, 27B. Each temperature controller 27A, 27B is provided with a temperature indicator at the top and a temperature setter at the bottom. The temperature setter is covered with a lid so that it is not inadvertently touched. The current flowing through each heater 25A, 25B is controlled so that the temperature measured by each sensor 26A, 26B matches the set temperature. Here, as an example, the temperature is set to 35 ° C.

  Here, the groove 21 of the main body portion 20 is a groove having a shape in which the upper surface and the front surface of the main body portion 20 are open and the left and right sides are partitioned by the pair of walls 22A and 22B.

  Moreover, the shaft 11 which comprises the hanging part 10 is supported by the cantilever shape by the back side of the main-body part 20 as above-mentioned. The shaft 11 extends directly above the groove 21 of the main body 20 and above the opening on the upper surface side of the main body 10 of the groove 21 toward the front side of the main body 10. With this structure, the frozen plasma bag 2 accommodated in the thawing-dedicated net 30 can be easily suspended and removed to improve workability.

  Further, the main body 20 is energized to the start / stop button 28 for instructing start and stop of the operation of the motor 12, the fans 24A and 24B and the heaters 25A and 25B, and the left and right heaters 25A and 25B. A pair of heater lamps 29A and 29B representing the above is provided. When the start / stop button 28 is pressed in the stop state, the operation of blowing warm air and swinging the shaft 11 is started, and the heater lamps 29A and 29B are turned on. If the start / stop button 28 is pressed again during this operation, the shaft 11 swings and the heaters 25A, 25B are de-energized, and the heater lamps 29A, 29B are turned off, but the fans 24A, 24B are predetermined. Continue to work further for a long time. This is because the heaters 25A and 25B in a heated state are cooled and then stopped.

  In this embodiment, in addition to the timer for measuring the time until the fans 24A and 24B are stopped after the start / stop button 28 is pressed again, the operation is started after the start / stop button 28 is pressed and then frozen. A timer (not shown) that is timed up when the thawing of the frozen plasma in the plasma bag 2 is completed is provided. When this timer expires, the procedure is the same as when the start / stop button 28 is pressed during operation, that is, the fans 24A and 24B operate for a while and then stop.

  Further, the frozen plasma thawing device 1 of the present embodiment includes a base portion 40 on which the main body portion 20 is placed. The base portion 40 is provided with a main power switch 41 for turning on and off the power of the frozen plasma thawing apparatus 1. Next to the main power switch 41, a power lamp 42 indicating on / off of the main power switch 41 is provided, and an operation knob 43 is provided next to the power lamp 42. When the operation knob 43 is operated, the rotation speed of the motor 12 that swings the shaft 11 changes. That is, by operating this operation knob 43, the speed of swinging of the shaft 11 in the direction of the arrow F-R is adjusted.

  When the main power switch 41 is inadvertently touched and the power is suddenly turned off, all operations including the fans 24A and 24B are suddenly stopped, so that the main power switch 41 is not inadvertently touched. Guides 44 projecting forward are provided on both sides of the main power switch 41.

  Further, a recess 401 extending in the front-rear direction is formed on a portion of the upper surface of the base 40 that is connected to the groove 21 of the main body 20, and dropped from the frozen plasma bag 2 into the recess 401. A flat plate 45 for receiving water drops is placed. The flat plate 45 can be removed freely, and the normal cleaning can be completed by removing the flat plate 45 and discarding the washed water or wiping it off.

  As described above, the frozen plasma thawing device 1 according to the present embodiment is easy to maintain and manage such as usual cleaning, and prevents contamination with germs.

  FIG. 4 is a view showing a frozen plasma bag housed in a thawing-dedicated net.

  The defrosting net 30 is a resin net with a mesh of about 1 cm square. The frozen plasma bag 2 is installed in the defrosting net 30. The frozen plasma bag 2 contains frozen plasma. The decompression-only net 30 is attached so that the shaft 11 is inserted, and is suspended from the shaft 11. Since the thawing-dedicated net 30 is a mesh-shaped net having a large number of large holes of about 1 cm square, it hardly interferes with the wiping of the wind to the frozen plasma bag 2.

  FIG. 5 is a schematic diagram showing the internal structure of the hanging portion.

  The hanging portion 10 includes a shaft 11, a motor 12, and a swing mechanism 13. The hanging part 10 is further provided with two supports 15 fixed to the base 14. These two supports 15 play a role of supporting the shaft 11 on the rear end side (the back side of the main body 20). These supports 15 support the shaft 11 so as to be slidable in the direction of the arrow FR. The swing mechanism 13 that constitutes the hanging portion 10 includes a cam member 131, a transmission shaft 132, and a connecting shaft 133. The cam member 131 is fixed to the rotating shaft 121 of the motor 12, and one end of the transmission shaft 132 is rotatably connected to the cam member 131 at a position deviated from the rotating shaft 121 of the cam member 131. Yes. Further, the other end of the transmission shaft 132 rotatably supports one end of the connecting shaft 133. The other end of the connecting shaft 133 is connected to the end of the shaft 11.

  When the motor 12 rotates, the cam member 131 fixed to the rotating shaft 121 of the motor 12 rotates in the arrow A direction. Then, the transmission shaft 132 connected to the cam member 131 reciprocates once in the direction of the arrow XY per one rotation of the cam member 131 while shaking the side connected to the cam member 131 up and down. The reciprocating movement of the transmission member 131 in the arrow XY direction is transmitted to the shaft 11 via the connecting shaft 133, and the shaft 11 swings in the arrow FR direction. This swing is one reciprocation per rotation of the motor 12.

  As described above, when the operation knob 43 (see FIG. 2) is operated, the rotation speed of the motor 12 is adjusted. As a result, the speed of swinging of the shaft 11 in the direction of the arrow FR is adjusted.

  Here, although an example of the decompression-dedicated net 30 and an example of the swing mechanism 13 are shown, these are not necessarily limited to the forms exemplified here, and are appropriately designed and manufactured.

  Further, here, as shown in FIG. 2, the frozen plasma thawing apparatus 1 having two systems of sensors 26A, 26B and temperature controllers 27A, 27B has been described, but only one temperature sensor and one temperature controller are provided, You may control in common about.

  In the present embodiment, the guide ducts 231A and 231B are provided and the direction of the air blowing is adjusted to be obliquely downward. However, instead of providing the guide ducts 231A and 231B, the air passages 23A and 23B are passed. You may make it blow off diagonally downward by the shape of air flow path 23A, 23B itself so that the incoming air may go to air blower outlet 222A, 222B from diagonally upward. Alternatively, the direction of the air blowing does not necessarily have to be obliquely downward, and the air may be blown out horizontally toward the top of the frozen plasma bag 2.

DESCRIPTION OF SYMBOLS 1 Frozen plasma thawing apparatus 2 Frozen plasma bag 10 Hanging part 11 Shaft 12 Motor 13 Oscillating mechanism 20 Main part 21 Groove 22A, 22B Wall 23A, 23B Air flow path 24A, 24B Fan 25A, 25B Heater 26A, 26B Temperature sensor 27A 27B Temperature controller 28 Start / stop button 29A, 29B Heater lamp 30 Defrosting net 41 Main power switch 42 Power lamp 43 Operation knob 44 Guide 45 Flat plate 221A, 221B Air inlet port 222A, 222B Air outlet port 231A, 231B Guide duct 241A , 241B Fan motor

Claims (3)

A horizontally disposed suspension part having a shaft for hanging a frozen plasma bag, and supporting the shaft in a cantilever shape;
A pair of walls standing up against each other and forming a groove into which a frozen plasma bag suspended from the shaft enters, both at the lower and upper portions of the pair of walls, both open toward the groove An air suction port and an air blowout port formed respectively,
The hanging portion includes a swing mechanism that includes a motor and swings the shaft in the extending direction of the shaft with the motor.
The main body is provided corresponding to each of the pair of walls,
An air flow path connecting the air inlet and the outlet;
A fan that sucks air in the groove from the air inlet and blows it out of the air outlet into the groove;
A frozen plasma thawing apparatus comprising a heater for heating air flowing in a pre-air flow channel.   The frozen plasma thawing apparatus according to claim 1, further comprising a mesh-shaped thawing-dedicated net that accommodates the frozen plasma bag and is suspended from the shaft. The groove is a groove having a shape that opens on both the upper surface and the front surface of the main body portion and is partitioned on the left and right by the pair of walls,
The shaft is supported in the form of a cantilever on the back side of the main body, and is directly above the groove, and above the opening on the upper surface of the main body toward the front of the main body. The frozen plasma thawing apparatus according to claim 1 or 2, wherein the frozen plasma thawing apparatus is a horizontally extending shaft.

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