Liquid delivery device and liquid delivery method

Abstract

To provide a fluid transfer device that can easily transfer a portion of a blood product in a medical bag to a collection container such as a collection bag when a large amount of culture tests of blood products are performed. [Solution] The fluid delivery device 100 comprises a mounting section 20, a holding section 30, and a pressing force applying section 50. A medical bag 10 is placed on the mounting section 20. The holding section 30, which is located at a height position higher than the mounting section 20, holds a collection container. The medical bag 10 and collection container are connected via a fluid delivery tube 12. The pressing force applying section 50 applies a pressing force to the medical bag 10, pushing the liquid inside the medical bag 10 toward the collection container.

Description

[Technical Field]

[0001] The present disclosure relates to a liquid delivery device and a liquid delivery method. [Background technology]

[0002] One type of liquid contained in a medical bag is a blood product. To ensure the safety of blood products, a specified amount of blood product is transferred from the medical bag to a small-capacity collection bag, and then a small amount of blood product is collected from the collection bag into multiple sampling containers for culture testing. This collection is performed using the following procedure.

[0003] First, a collection bag is connected to a medical bag via a tube, then a portion of the blood product is transferred from the medical bag to the collection bag, and then the collection bag is separated from the medical bag.

[0004] Next, in the clean bench, multiple sampling containers are connected to the collection bag, and a predetermined amount of blood product is transferred from the collection bag to the multiple sampling containers. Aerobic culture is performed using one of the multiple sampling containers, and anaerobic culture is performed using another of the multiple sampling containers.

[0005] Japanese Patent Application Laid-Open Publication No. 2013-23287 discloses a device for pushing all of a frozen blood product out of a medical bag. The device includes two rollers. The medical bag is sandwiched between the two rollers and passed through the two rollers. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-23287 Summary of the Invention [Problem to be solved by the invention]

[0007] When a large number of blood product culture tests are performed, it is desirable to be able to easily transfer a portion of the blood product in a medical bag to a collection container such as a collection bag, as this would improve work efficiency. The device disclosed in JP 2013-23287 A is a device for pushing out all of the frozen blood product in the medical bag, so it is not easy to push out a portion of the liquid in the medical bag using this device.

[0008] The present disclosure aims to solve the above-mentioned problems. [Means for solving the problem]

[0009] (1) A first aspect of the present disclosure is a fluid delivery device for transferring a liquid in a medical bag to a collection container connected to the medical bag via a fluid delivery tube, the fluid delivery device comprising: a mounting section on which the medical bag is placed; a holding section that is located at a height position higher than the mounting section and holds the collection container; and a pressing force applying section that applies a pressing force to the medical bag placed on the mounting section, thereby pushing the liquid in the medical bag toward the collection container.

[0010] In this fluid delivery device, the pressure applying unit applies a pressure to the medical bag, thereby starting the delivery of fluid from the medical bag to the collection container, making it easy to transfer fluid from the medical bag to the collection container.

[0011] (2) In the liquid delivery device described in the above item (1), the pressing force applying unit may be a roller that can apply a pressing force to the medical bag by rotating.

[0012] With this configuration, by rotating the roller, the liquid can be easily transferred from the medical bag to the collection container.

[0013] (3) In the liquid delivery device described in item (2) above, the portion of the placement section facing the roller may have a first regulating portion, and the roller may have a second regulating portion, one of the first regulating portion and the second regulating portion being a groove and the other being a rib inserted into the groove, and the first regulating portion and the second regulating portion may prevent the roller from shifting position in the axial direction of the roller relative to the placement section.

[0014] In this case, the rollers are prevented from being displaced relative to the base, so that the rollers can reliably apply a pressing force to the medical bag.

[0015] (4) The liquid delivery device described in item (2) above may be provided with a drive unit that drives the roller to rotate, and a measurement unit that measures a parameter for determining the amount of liquid delivered from the medical bag to the collection container.

[0016] With this configuration, the drive unit rotates the roller, reducing the burden on the operator. Also, the measuring unit makes it easy to determine the amount of fluid transferred from the medical bag to the collection container.

[0017] (5) In the liquid delivery device described in item (4) above, a control unit may be provided to control the drive unit, the measurement unit may have a rotation amount measurement unit that measures the rotation amount of the roller, and the control unit may stop the rotation of the roller when the rotation amount of the roller reaches a set rotation amount.

[0018] With this configuration, the amount of rotation of the roller can be measured and it can be determined that a predetermined amount of liquid has been transferred from the medical bag to the collection container, and the rotation of the roller can be automatically stopped, thereby further reducing the operational burden on the operator.

[0019] (6) In the liquid delivery device described in item (4) above, a control unit may be provided to control the drive unit, the measurement unit may have a weight measurement unit that measures the weight of the collection container, and the control unit may stop the rotation of the roller when the weight reaches a set weight.

[0020] With this configuration, the roller rotation can be automatically stopped when the specified amount of liquid has been transferred from the medical bag to the collection container by measuring the weight of the collection container, thereby further reducing the burden on the operator.

[0021] (7) The liquid delivery device according to any one of the above items (1) to (6) may further include a clamp for closing the tube.

[0022] For example, when a predetermined amount of liquid has been collected in the collection container, the tube can be closed with a clamp to stop the transfer of liquid from the medical bag to the collection container, thereby preventing the transfer of more liquid than the predetermined amount to the collection container.

[0023] (8) A second aspect of the present disclosure is a fluid transfer method for transferring a liquid in a medical bag to a collection container connected to the medical bag via a fluid transfer tube, the method comprising: a loading step of loading the medical bag on a loading section; a holding step of holding the collection container in a holding section located above the loading section; a transfer step of applying a pressing force from a pressing force applying section to the medical bag loaded on the loading section, thereby causing the liquid in the medical bag to flow toward the collection container; and a transfer stopping step of stopping the flow of the liquid from the medical bag to the collection container when the amount of the liquid transferred to the collection container reaches a specified amount.

[0024] The pressure applying unit applies a pressure to the medical bag, thereby starting the transfer of the liquid from the medical bag to the collection container. That is, the transfer process is carried out. This makes it easy to transfer the liquid from the medical bag to the collection container.

[0025] (9) In the liquid transfer method described in the above item (8), the pressing force applying unit may be a roller, and the transfer stopping step may be performed when the amount of rotation of the roller reaches a set amount of rotation.

[0026] In this case, the amount of fluid transferred from the medical bag to the collection container can be easily determined by measuring the rotation of the roller. Also, by performing the transfer stop step when a predetermined amount of fluid has been transferred to the collection container, the transfer of fluid can be stopped.

[0027] (10) In the liquid transfer method described in item (8) above, the weight of the collection container placed on the placement section may be measured by a weight measuring section, and the transfer stopping step may be performed when the weight reaches a preset set weight.

[0028] In this case, the amount of fluid transferred from the medical bag to the collection container can be easily determined by measuring the weight of the collection container. Furthermore, by performing the transfer stop step when a predetermined amount of fluid has been transferred to the collection container, the transfer of fluid can be stopped. [Effects of the Invention]

[0029] According to the present disclosure, liquids in a medical bag can be easily transferred to a collection container. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is a schematic perspective view of a liquid delivery device according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a process diagram illustrating the liquid transfer method of the present disclosure. [Figure 3] FIG. 3 is a side view of the essential part showing a state in which the medical bag is in contact with the roller serving as the pressing force applying portion. [Figure 4] FIG. 4 is a side view of the main part showing a state in which a pressing force is applied to the medical bag from the roller. [Figure 5]FIG. 5 is a schematic perspective view of the liquid delivery device with a clamp clamped on a tube. [Figure 6] FIG. 6 is a schematic perspective view of a liquid delivery device according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0031] The following describes an example in which the collection bag 14 shown in Fig. 1 is used as a collection container. However, the collection container is not limited to the collection bag 14. The collection container may be a collection bottle or the like.

[0032] 1 is a schematic perspective view of a liquid delivery device 100 according to the first embodiment. The liquid delivery device 100 includes a base 70. The base 70 has a substantially triangular prism shape, and one of the three corners of the base 70 is a substantially right angle. The base 70 has an inclined portion 72.

[0033] The liquid delivery device 100 includes a mounting section 20 and a holding section 30. The mounting section 20 and the holding section 30 are provided at different positions on an inclined section 72 of a base 70. The mounting section 20 is provided at one end of the base 70 in the length direction (L direction). The holding section 30 is provided at the other end of the base 70 in the length direction. The inclined section 72 is inclined with respect to the horizontal plane so as to extend upward from the mounting section 20 toward the holding section 30.

[0034] The mounting portion 20 is part of the inclined surface 74 of the inclined portion 72 of the base 70. A medical bag 10 containing a liquid is placed on the mounting portion 20. The liquid is a medical liquid. A specific example of the liquid is a blood product such as a platelet product, but the liquid is not limited to blood products. The liquid may also be a medicinal liquid, physiological saline, or the like.

[0035] In the first embodiment, a plurality of medical bags 10 (six in the illustrated example) are placed on the mounting portion 20. Two adjacent medical bags 10 are spaced apart in the width direction (W direction) of the base 70. However, the number of medical bags 10 placed on the mounting portion 20 may be one. The width direction of the base 70 is a direction parallel to the horizontal plane and perpendicular to the length direction (L direction) of the base 70.

[0036] The mounting portion 20 has a first restriction portion 40. In one embodiment, the first restriction portion 40 has a groove 42 formed in the mounting portion 20. In the illustrated example, four grooves 42 are provided at intervals in the width direction of the base 70. The intervals are greater than the width of the medical bag 10 to be mounted on the mounting portion 20. Furthermore, the intervals are, for example, less than 1.5 times the width of the medical bag 10. Setting the intervals in this manner prevents displacement of the medical bag 10 in the width direction. Each groove 42 extends in the same direction as the inclined portion 72. The number of grooves 42 may be one.

[0037] The height position of the holding portion 30 is higher than the height position of the mounting portion 20. The holding portion 30 is, for example, a recess 32 recessed from the inclined surface 74 of the inclined portion 72. The bottom surface of the recess 32 is, for example, parallel to the inclined surface 74. The collection bag 14 is stored in the recess 32. The recess 32 prevents the collection bag 14 from sliding down the inclined surface 74 from the holding portion 30. Instead of the recess 32, a stopper protruding upward from the inclined surface 74 may be provided to prevent the collection bag 14 from sliding down. Before the transfer of liquid from the medical bag 10 begins, the collection bag 14 is empty. The number of collection bags 14 is, for example, the same as the number of medical bags 10 placed on the mounting portion 20.

[0038] The configuration for providing a height difference between the placing portion 20 and the holding portion 30 is not limited to the inclined portion 72. For example, a step may be provided between the placing portion 20 and the holding portion 30, with the medical bag 10 placed on the lower portion as the placing portion 20 and the collection bag 14 as the holding portion 30.

[0039] The medical bag 10 and the collection bag 14 are connected via a tube 12. The tube 12 is constructed by aseptically joining a connection tube 12a extending from the medical bag 10 and a connection tube 12b extending from the collection bag 14. As will be described later, liquid in the medical bag 10 is transferred to the collection bag 14 via the tube 12.

[0040] The inclined portion 72 is formed with a plurality of notches 34 that are continuous with the lower edge 32a of the recess 32. The number of notches 34 is the same as the number of tubes 12 (the number of collection bags 14). The tubes 12 are passed through each notch 34. This prevents the tubes 12 from riding up on the lower edge 32a of the recess 32 and being bent.

[0041] The liquid delivery device 100 includes a pressing force applying unit 50. In one aspect, the pressing force applying unit 50 is a rotatable roller 52. The roller 52 is rotatable about an axis Ax that is parallel to the width direction of the base 70. The side peripheral surface (outer peripheral surface) of the roller 52 is a pressing surface 53 that can press the medical bag 10. Note that the pressing force applying unit 50 is not limited to the roller 52. The pressing force applying unit 50 may be a movable member that can be displaced so as to approach the base 70 (mounting unit 20).

[0042] The roller 52 is provided with a rotating shaft 54. The rotating shaft 54 ​​is rotatably supported by two support columns 56. The two support columns 56 each have a connecting portion 76 that is connected to two side surfaces 75 of the base 70. This fixes the two support columns 56 to the base 70. Therefore, the distance between the pressing surface 53 of the roller 52 and the inclined surface 74 of the base 70 is maintained constant. Two handles 58 are attached to both axial ends of the rotating shaft 54, respectively. As the two handles 58 are rotated, the rotating shaft 54 ​​and the roller 52 rotate integrally.

[0043] The roller 52 has a second restricting portion 44. In an embodiment in which the first restricting portion 40 is a plurality of grooves 42, the second restricting portion 44 is a plurality of ribs 46 protruding in the diameter direction from the side peripheral surface (pressing surface 53) of the roller 52. The plurality of ribs 46 are provided at intervals in the axial direction of the roller 52 (the width direction: W direction of the base 70). Each rib 46 is annular and extends along the circumferential direction of the roller 52. The number of ribs 46 is the same as the number of grooves 42, which is four in the illustrated example. Each rib 46 is inserted into each groove 42. When there is one groove 42, there is also one rib 46. Note that a linear rib may be provided as the first restricting portion 40 on the mounting portion 20, and an annular groove may be provided as the second restricting portion 44 on the roller 52.

[0044] As can be seen from this, the placement portion 20 has the first restriction portion 40 (groove 42 in the illustrated example) at the portion facing the roller 52.

[0045] 5, the liquid delivery device 100 includes a plurality of clamps 16. The number of clamps 16 is the same as the number of tubes 12 (the number of collection bags 14). Each clamp 16 may be connected to a base 70 (e.g., an inclined surface 74) or the like via a connecting cord (not shown).

[0046] The liquid delivery device 100 is used as follows: The liquid delivery method according to this embodiment (see FIG. 2) is carried out using the liquid delivery device 100.

[0047] In a preparation step before using the fluid delivery device 100, an operator joins the connection tube 12a extending from the medical bag 10 and the connection tube 12b extending from the collection bag 14 using, for example, a sterile joining device. The tube 12 is formed by joining the connection tube 12a and the connection tube 12b to each other.

[0048] The amount of liquid to be collected from the medical bag 10 into the collection bag 14 is predetermined. Hereinafter, this predetermined amount of liquid to be collected (the desired amount of liquid to be collected) will be referred to as the "predetermined amount." The operator conducts an experiment to determine the amount of rotation (rotation angle) of the rollers 52 from when the rollers 52 start to rotate until a predetermined amount of liquid is transferred to the collection bag 14. The rotation amount thus obtained is determined as the "set rotation amount." In other words, this experiment determines the relationship between the amount of rotation of the rollers 52 and the amount of liquid transferred from the medical bag 10 to the collection bag 14. Depending on the diameter of the rollers 52, the set rotation amount is, for example, 20° to 180°. To facilitate the operator's rotation of the handle 58, the diameter of the rollers 52 may be set so that the set rotation amount is 90° or less.

[0049] Alternatively, a bag having a capacity slightly larger than the specified volume may be used as the collection bag 14. In this case, there is no need to determine the set rotation amount.

[0050] 2, the liquid transfer method includes a placing step S1, a holding step S2, a transfer step S3, and a transfer stopping step S4. In the following, in addition to FIG. 2, FIGS. 1 to 5 will also be referred to as appropriate.

[0051] The worker first performs the placing step S1. In the placing step S1, the medical bag 10 is placed on the placing portion 20 as shown in FIG. 1 . The worker then performs the holding step S2. In the holding step S2, the collection bag 14 is held in the recess 32 (holding portion 30). The placing step S1 and the holding step S2 can be performed in any order. However, because the weight of the medical bag 10 is greater than the weight of the collection bag 14, it is preferable to perform the placing step S1 before the holding step S2.

[0052] When placing the medical bag 10 on the mounting section 20, the lower end of the medical bag 10 is brought into contact with the lower part of the roller 52 (pressing surface 53), as shown in FIG. 3. This stops the medical bag 10. Alternatively, when placed on the mounting section 20, the medical bag 10 may slide down slightly along the inclined surface 74 due to its own weight and come into contact with the roller 52. The lower end of the medical bag 10 is located between two adjacent ribs 46.

[0053] Because the height position of the recess 32 is higher than the height position of the mounting portion 20, the collection bag 14 held in the recess 32 is positioned higher than the medical bag 10 placed on the mounting portion 20. Based on this positional relationship, liquid is prevented from flowing from the medical bag 10 toward the collection bag 14. In other words, liquid is prevented from being transferred from the medical bag 10 located below to the collection bag 14 located above.

[0054] To prevent the liquid from unintentionally starting to flow from the medical bag 10 toward the collection bag 14, the operator may perform the placing step S1 and the holding step S2 with the tube 12 closed with a clamp 16 (see FIG. 5). In this case, the operator removes the clamp 16 from the tube 12 and releases the blockage of the tube 12 before performing the transferring step S3.

[0055] Next, the worker performs the transfer step S3. Specifically, the worker grasps each of the two handles 58 (see FIG. 1) with both hands. In this state, the worker rotates the two handles 58 in the direction of arrow A shown in FIG. 3. As a result, the rollers 52 rotate in the direction of arrow A, and as shown in FIG. 4, the lower part of the medical bag 10 is pulled between the inclined surface 74 and the pressing surface 53 of the rollers 52. That is, the lower part of the medical bag 10 is sandwiched between the inclined surface 74 and the pressing surface 53. Therefore, the lower surface of the lower part of the medical bag 10 is pressed by the inclined surface 74, and the upper surface of the lower part of the medical bag 10 is pressed by the rollers 52.

[0056] In this way, a pressing force is applied to the lower part of the medical bag 10. This pressing force forces the liquid in the medical bag 10 into the tube 12. As a result, the tube 12 expands. The liquid forced out of the medical bag 10 flows through the tube 12 against gravity and then flows into the collection bag 14. In other words, the liquid in the medical bag 10 is transferred to the collection bag 14 via the tube 12.

[0057] The rollers 52 rotate with the ribs 46 of the rollers 52 inserted into the grooves 42 of the mounting portion 20. This prevents the rollers 52 from shifting in their axial direction (W direction) relative to the mounting portion 20. The ribs 46 also prevent the medical bag 10 from shifting in its position in the width direction (W direction) of the base 70.

[0058] When the operator determines that the rotation amount of the rollers 52 has reached the set rotation amount, the operator transitions from the transfer step S3 to the transfer stop step S4. Specifically, the operator stops the rotation of the rollers 52. Accordingly, the lower portion of the medical bag 10 stops being pulled between the inclined surface 74 and the lower portion of the rollers 52. That is, once a specified amount of liquid has been transferred to the collection bag 14, the flow of liquid from the medical bag 10 to the collection bag 14 stops. This prevents an amount of liquid exceeding the specified amount from being transferred to the collection bag 14. Note that when the set rotation angle of the rollers 52 is 180° or less, the medical bag 10 does not wrap around the pressing surface 53 of the rollers 52 and detach from the mounting portion 20. That is, the medical bag 10 maintains a state in which its lower surface abuts against the inclined surface 74.

[0059] If the collection bag 14 has a capacity slightly larger than the specified amount, the worker visually checks the amount of liquid contained in the collection bag 14 in the transfer step S3. When the worker confirms that the collection bag 14 is filled with liquid, the worker stops the rotation of the rollers 52 and transitions from the transfer step S3 to the transfer stop step S4.

[0060] As described above, the fluid delivery device 100 makes it easy to deliver a specified amount of fluid from multiple medical bags 10 to multiple collection bags 14. Moreover, because a specified amount of fluid can be delivered from multiple medical bags 10 to multiple collection bags 14, work efficiency can be improved. This makes it possible to handle situations where culture tests are individually performed on fluids in large quantities of medical bags 10.

[0061] In this state, the operator clamps the clamp 16 around the tube 12 as shown in Figure 5. As a result, the tube 12 is closed by the clamp 16. This prevents the liquid from flowing through the tube 12. This reliably stops the transfer of liquid from the medical bag 10 to the collection bag 14. It also prevents the liquid from returning from the collection bag 14 to the medical bag 10.

[0062] The worker removes the medical bag 10 from the mounting portion 20 and removes the collection bag 14 from the recess 32. Then, the tube 12 is cut to separate the medical bag 10 and the collection bag 14.

[0063] The first embodiment has the following advantages.

[0064] The fluid delivery device 100 includes a mounting section 20, a recessed section 32 (holding section 30) provided at a height position above the mounting section 20, and a roller 52 (pressing force applying section 50) that applies a pressing force to the medical bag 10 placed on the mounting section 20. When a pressing force is applied to the medical bag 10 by the roller 52, the liquid inside the medical bag 10 is pushed out and moves toward the collection bag 14 held in the recessed section 32. As a result, the liquid is transferred from the medical bag 10 to the collection bag 14.

[0065] In this way, with the liquid delivery device 100, the rollers 52 apply a pressing force to the medical bag 10, thereby making it possible to easily transfer the liquid from the medical bag 10 to the collection bag 14.

[0066] Furthermore, the fluid delivery device 100 can transfer a specified amount of fluid from multiple medical bags 10 to multiple collection bags 14. This improves work efficiency and prevents the collection amounts of fluid from differing significantly between the multiple collection bags 14.

[0067] The mounting portion 20 has a groove 42 (first restriction portion 40), and the roller 52 has a rib 46 (second restriction portion 44). The roller 52 rotates with the rib 46 inserted into the groove 42. This prevents the roller 52 from shifting in its axial direction relative to the mounting portion 20. This ensures that the roller 52 applies a pressing force to the medical bag 10. In addition, the medical bag 10 is also prevented from shifting in its position in the width direction of the base 70.

[0068] The fluid delivery device 100 includes a clamp 16. The clamp 16 closes the tube 12. By attaching the clamp 16 to the tube 12 after the transfer of the fluid has been completed, the flow of the fluid from the medical bag 10 to the collection bag 14 can be reliably stopped. This prevents an excessive amount of fluid from being transferred to the collection bag 14. It also prevents the fluid from returning from the collection bag 14 to the medical bag 10.

[0069] The liquid transfer method includes a transfer step S3. In the transfer step S3, a pressing force is applied from the rollers 52 to the medical bag 10 placed on the placement section 20. This causes the liquid in the medical bag 10 to flow toward the collection bag 14 held in the recess 32.

[0070] In this way, the rollers 52 apply a pressing force to the medical bag 10, thereby starting the transfer of liquid from the medical bag 10 to the collection bag 14. This makes it easy to transfer liquid from the medical bag 10 to the collection bag 14.

[0071] In one embodiment, when the number of rotations of the rollers 52 reaches a set number of rotations, it is determined that the amount of liquid transferred to the collection bag 14 has reached a specified amount. In this case, the rotation of the rollers 52 is stopped, thereby stopping the flow of liquid from the medical bag 10 to the collection bag 14. In other words, the transfer stop step S4 is performed.

[0072] By determining the amount of rotation of the rollers 52, it is possible to easily determine the amount of fluid being transferred from the medical bag 10 to the collection bag 14. Furthermore, by stopping the rotation of the rollers 52 when a predetermined amount of fluid has been transferred to the collection bag 14, it is possible to prevent an excessive amount of fluid from being transferred to the collection bag 14.

[0073] In the first embodiment, an example is described in which an operator rotates and stops the roller 52. However, the rotation of the roller 52 may be started and stopped by automatic control. This example will be described as a second embodiment with reference to Fig. 6. Note that the same components as those shown in Figs. 1 to 5 are given the same reference numerals, and detailed description thereof will be omitted.

[0074] In the liquid delivery device 110 according to the second embodiment, the holding portion 30 of the base 71 is a flat portion 36. The flat portion 36 has a horizontal surface that is continuous with the upper end of the inclined surface 74 of the inclined portion 72. The collection bag 14 is held by the flat portion 36. A stopper may be provided on the upper edge 74a of the inclined surface 74 (the front edge of the flat portion 36). The stopper may be, for example, plate-shaped, and prevents the collection bag 14 from sliding down along the inclined surface 74. The stopper has a notched groove formed therein for passing the tube 12 therethrough.

[0075] The liquid delivery device 110 includes a control unit 60, a drive unit 66, and a measurement unit 80. The drive unit 66 and the measurement unit 80 are electrically connected to the control unit 60. The control unit 60 controls the drive unit 66.

[0076] The control unit 60 has a calculation unit 62 and a memory unit 64. The calculation unit 62 is configured by a processor such as a CPU (Central Processing Unit), i.e., a processing circuitry. The memory unit 64 stores the set weight of the rotating shaft 54. The set weight is the weight of the liquid when the liquid is at a specified amount. The set weight is checked in advance by the operator.

[0077] The drive unit 66 is, for example, a motor having a drive shaft. The drive unit 66 and the rotating shaft 54 ​​are connected via a power transmission mechanism 67. An example of the power transmission mechanism 67 is a pulley and belt. The power transmission mechanism 67 may be a gear train. The drive unit 66 operates in response to a command signal to start driving being input to the control unit 60. The driving force of the drive unit 66 is transmitted to the rotating shaft 54 ​​via the power transmission mechanism 67. The command signal to start driving is input to the control unit 60, for example, when the operator operates an operation unit (not shown).

[0078] The measuring unit 80 includes, for example, a weight measuring unit 82. The weight measuring unit 82 is provided on the base 71 so as to be embedded in the flat portion 36. The weight measuring unit 82 is, for example, an electronic balance.

[0079] In the illustrated example, the weight measuring unit 82 measures the weight of the liquid that has flowed into one representative collection bag 14a out of the multiple collection bags 14. The measured weight is displayed on an indicator (not shown) of the weight measuring unit 82. Alternatively, the same number of weight measuring units 82 as the number of collection bags 14 may be provided on the flat section 36, and the weight of the liquid that has flowed into all of the collection bags 14 may be measured. Information related to the measured weight values ​​is sent to the calculation unit 62 of the control unit 60.

[0080] In another aspect, the measuring unit 80 may have a rotation amount measuring unit 84, as shown by the imaginary line in FIG. 6, instead of the weight measuring unit 82 described above. The rotation amount measuring unit 84 is, for example, a resolver. The rotation amount measuring unit 84 measures the amount of rotation of the drive shaft of the motor that constitutes the driving unit 66. The calculating unit 62 calculates the amount of rotation of the rotating shaft 54 ​​(the amount of rotation of the roller 52) based on this amount of rotation. The rotation amount measuring unit 84 may also directly measure the amount of rotation of the rotating shaft 54.

[0081] In this embodiment, the set rotation amount is stored in the storage unit 64. Information regarding the rotation amount of the rotary shaft 54 ​​is transmitted to the calculation unit 62.

[0082] The measuring unit 80 may have an integrating flow meter instead of the weight measuring unit 82 or the rotation amount measuring unit 84.

[0083] 2 using the above-described liquid delivery device 110 will be described below. First, the operator performs the placing step S1 and the holding step S2 in any order according to the first embodiment. This results in the state shown in FIG. 3.

[0084] Next, the operator inputs a command signal to start driving into the control unit 60. Specifically, the operator operates, for example, an operating unit (e.g., a button or switch, etc.) not shown. This activates the drive unit 66, and the drive force is transmitted to the rotating shaft 54 ​​via the power transmission mechanism 67. Therefore, the rotating shaft 54 ​​rotates at a low speed. As a result, the transfer step S3 is initiated. That is, the state shown in FIG. 4 is created, and liquid flows from the medical bag 10 toward the collection bag 14, similar to the first embodiment.

[0085] In the transfer step S3, the measuring unit 80 measures a parameter for determining the amount of liquid transferred from the medical bag 10 to the collection bag 14. In an embodiment in which the measuring unit 80 includes a weight measuring unit 82, the parameter is the weight of the liquid in the collection bag 14. The indicator of the weight measuring unit 82 may display the weight of the liquid that has flowed into the collection bag 14.

[0086] The measured value of the weight of the liquid is sent as information from the weight measuring unit 82 to the calculation unit 62. The calculation unit 62 compares the measured value with a set weight stored in the memory unit 64. The calculation unit 62 determines whether the weight of the liquid is equal to or greater than the set weight. If the calculation unit 62 determines that the weight of the liquid is less than the set weight, the roller 52 continues to rotate.

[0087] On the other hand, if the calculation unit 62 determines that the weight of the liquid is equal to or greater than the set weight, the control unit 60 stops the rotation of the rollers 52. Accordingly, the process moves from the transfer step S3 to the transfer stop step S4. An alarm may be sounded when the weight of the liquid reaches the set weight.

[0088] In an embodiment in which the measuring unit 80 has a rotation amount measuring unit 84, the parameter is the rotation amount of the roller 52. In this case, the calculating unit 62 calculates the rotation amount of the rotating shaft 54 ​​based on the information transmitted from the rotation amount measuring unit 84. The calculating unit 62 compares the set rotation amount stored in the memory unit 64 with the actual rotation amount of the rotating shaft 54. If the actual rotation amount is less than the set rotation amount, the rotation of the roller 52 continues.

[0089] On the other hand, when the calculation unit 62 determines that the actual rotation amount has reached the set rotation amount, the control unit 60 stops the rotation of the roller 52. Accordingly, the process proceeds from the transfer step S3 to the transfer stop step S4. When the actual rotation amount has reached the set rotation amount, a warning sound may be emitted.

[0090] As the rotation of the rollers 52 stops, the transfer of liquid from the medical bag 10 to the collection bag 14 stops, as in the first embodiment. In this state, the operator clamps the tube 12 with the clamp 16 to close the tube 12, as in Figure 5.

[0091] As described above, the liquid delivery device 110 also makes it easy to deliver a specified amount of liquid from a plurality of medical bags 10 to a plurality of collection bags 14, respectively.

[0092] According to the second embodiment, in addition to the above-mentioned effects, the effect of reducing the operational burden on the operator can be obtained.

[0093] Although the present disclosure has been described in detail, the present disclosure is not limited to the individual embodiments described above. Various additions, substitutions, modifications, partial deletions, etc. are possible in these embodiments without departing from the gist of the present disclosure or the spirit of the present disclosure derived from the content of the claims and their equivalents. These embodiments can also be implemented in combination. For example, in the above-described embodiments, the order of each operation and the order of each process are shown as examples and are not limited to these. The same applies when numerical values ​​or mathematical expressions are used in the description of the above-described embodiments. [Explanation of symbols]

[0094] 10...Medical bag 12...Tube 14, 14a...Collection bag 16...Clamp 20: Placement portion 30: Holding portion 40...first restricting portion 42...groove 44... Second restriction portion 46... Rib 50: Pressing force applying portion 52: Roller 58...Handle 60...Control unit 66...Drive unit 70, 71...Base 80... Measuring unit 100, 110... Liquid delivery device

Claims

1. A liquid delivery device for transferring a liquid in a medical bag to a collection container connected to the medical bag via a liquid delivery tube, a placement portion on which the medical bag is placed; a holder that is provided at a height position higher than the placement portion and holds the collection container; a pressing force applying unit that applies a pressing force to the medical bag placed on the placing unit to push the liquid in the medical bag toward the collection container; A liquid delivery device comprising:

2. 2. The liquid delivery device according to claim 1, wherein the pressing force applying unit is a roller that can apply a pressing force to the medical bag by rotating.

3. 3. The liquid delivery device according to claim 2, wherein the placement unit has a first restricting portion at a portion facing the roller, and the roller has a second restricting portion; one of the first restricting portion and the second restricting portion is a groove, and the other is a rib inserted into the groove; The liquid delivery device, wherein the first regulating portion and the second regulating portion prevent the roller from being displaced in the axial direction of the roller relative to the placement portion.

4. 3. The liquid delivery device according to claim 2, further comprising: a drive unit that drives the roller to rotate; and a measurement unit that measures a parameter for determining the amount of liquid delivered from the medical bag to the collection container.

5. 5. The liquid delivery device according to claim 4, further comprising a control unit for controlling the drive unit, wherein the measurement unit has a rotation amount measurement unit for measuring the rotation amount of the roller, The control unit stops the rotation of the roller when the rotation amount of the roller reaches a set rotation amount.

6. 5. The liquid delivery device according to claim 4, further comprising a control unit for controlling the drive unit, wherein the measurement unit has a weight measurement unit for measuring a weight of the collection container, The control unit stops the rotation of the roller when the weight reaches a set weight.

7. 7. The liquid delivery device according to claim 1, further comprising a clamp for closing the tube.

8. A liquid transfer method for transferring a liquid in a medical bag to a collection container connected to the medical bag via a liquid transfer tube, comprising: a placing step of placing the medical bag on a placing portion; a holding step of holding the collection container in a holding part located above the placing part; a transfer step of applying a pressing force from a pressing force applying unit to the medical bag placed on the placing unit, thereby causing the liquid in the medical bag to flow toward the collection container; a transfer stopping step of stopping the flow of the liquid from the medical bag to the collection container when the amount of the liquid sent to the collection container reaches a predetermined amount; A liquid delivery method comprising the steps of:

9. 9. The liquid transfer method according to claim 8, wherein the pressing force applying unit is a roller, and the transfer stopping step is performed when the amount of rotation of the roller reaches a set amount of rotation.

10. 9. The liquid transfer method according to claim 8, wherein the weight of the collection container placed on the placement section is measured by a weight measuring section, and the transfer stopping step is performed when the weight reaches a preset set weight.

Images