JP2010029411A - Drip cylinder and drip device with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily view fluctuation in dripping intravenous droplets. <P>SOLUTION: Liquid flows from an upstream side transfusion tube 40a through an inflow side connection tube 13 and an opening into a drip tube 14, is made into droplets, is dripped into a tubular body 11 droplet by droplet from the distal end of the drip tube 14 at prescribed intervals of time, and the liquid having an amount equal to that of one droplet dripped from the liquid accumulated on the lower part side of the tubular body 11 flows through an outflow port to a downstream side transfusion tube 40b and administered to a patient by a fine amount each through a puncture needle. The intravenous droplet 18 accumulated at the distal end of the drip tube 14 is enlarged and projected on the magnifying mirror 17 like the drip tube 14a and the intravenous droplet 18a projected on the magnifying mirror 17. A state in which the intravenous droplet 18 accumulated at the distal end of the drip tube 14 is gradually enlarged and a state in which the intravenous droplet 18 drips from the distal end of the drip tube 14 can be magnified by the magnifying mirror 17 and observed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an infusion tube used for a medical infusion line or the like and an infusion device including the same.

An infusion tube is provided, for example, in an infusion line (infusion channel) for administering a drug solution or the like to a patient. If the number of infusions from an infusion tube provided in the infusion tube is measured, the volume of one infusion droplet can be calculated. The dose (infusion volume) per unit time (for example, 1 minute) can be measured. According to the known one in Patent Document 1, by repeating high-speed scanning with a laser beam on the droplets dropped from the drip tube, the time during which the laser beam is blocked by the droplets is measured for each scan. Yes. Then, by accurately calculating the volume of one drop based on this time, a highly accurate measurement result can be obtained. By using this measurement result for the flow rate control of the infusion pump, it is desired for the patient or the like. It is possible to administer an infusion at a flow rate of.
JP-A-2-51022

  By the way, there is a case where it is desired to confirm the flow of the infusion in the infusion channel by visual observation, or to measure the amount of infusion by measuring the number of infusions by visual observation. In these cases, fluctuations of the drip droplets (droplet dripping itself and shape change until the drip droplet dripping) are visually observed. However, when the amount of infusion flowing through the infusion channel is very small, the number of drops is small, and a thin infusion tube is used. Accordingly, the drip droplets are also reduced. It is expected that it takes time and is overlooked if it is attempted to visually observe such small droplets with a small number of drops. For this reason, it is difficult to visually observe the fluctuation of the dripping droplets.

  The present invention has been made to cope with such problems, and an object of the present invention is to provide an infusion tube and an infusion device including the infusion tube that make it easy to visually observe the variation of the instilled droplets. It is.

  In order to achieve the above-described object, the structural features of the drip tube according to the present invention include a cylindrical body having an inlet at one end and an outlet at the other end, and liquid is dropped from the inlet into the cylinder. The drip tube is provided with a magnifying mirror that is provided on the outer periphery of the cylindrical body and magnifies the inlet.

  According to the drip tube according to the present invention configured as described above, when the liquid is dropped from the inflow port into the cylinder, the drip particles dripped from the inflow port are magnified and projected by the magnifying glass. For this reason, it becomes easy to visually check not only the drip droplets but also the state in which the drip particles change. By visually observing the dropped droplets, the number of drops per unit time (for example, 1 minute) is measured, and the flow rate of the liquid per unit time (for example, 1 minute) can be measured from the volume of one droplet. it can. Further, the flow of the liquid can be confirmed (confirmation of whether or not the liquid is flowing).

  Another structural feature of the infusion tube according to the present invention is that the inflow port is formed at the tip of an infusion tube provided so as to enter the inside of the tube. When a small amount of liquid is supplied, if an infusion tube is used and a thin infusion tube is used, the instillation particle will be small, but since a magnifier is provided, the instillation particle can be enlarged and viewed. Grain confirmation can be performed reliably.

  Still another structural feature of the drip tube according to the present invention is that the flow rate of the liquid dropped from the inlet is 0.1 ml / h to 20 ml / h. For example, a magnifying glass is particularly effective when supplying a very small amount of drug solution to a patient's body over a long period of time, such as a pressurizing agent, a high-pressure agent, or an anesthetic.

  The drip device according to the present invention is characterized by the drip device provided with the drip cylinder described above, wherein the drip device is connected to the inflow port via the flow path and contains a liquid inside, and inside the liquid containing portion And a driving means for supplying the liquid to the infusion tube through the flow path. According to this, the liquid is supplied by the operation of the pump, and the supply amount per unit time can be set with high accuracy. Therefore, it is only necessary to visually check the drip to confirm that the pump is operating properly.

  As an infusion device, in the configuration of the infusion device described above, the pump is configured by a syringe pump including a cylinder, a piston, and a drive unit, and the drive unit is accommodated in the cylinder by moving the piston. It is possible to supply liquid to the drip tube via a flow path. In this case, a liquid storage part is comprised with a cylinder, and a drive means is comprised with a piston and a drive part. For example, when a pressurizing agent, a high-pressure agent, an anesthetic or the like is administered in a minute amount over a long period of time, a syringe pump different from the gravity drop type is often used because high accuracy is required for the dosage. In the syringe pump, the piston is moved by the operation of the driving unit to supply the liquid in the cylinder, and the change in the moving distance of the piston corresponds to the liquid flow rate. For this reason, in order to confirm the flow of the liquid in a flow path, what is necessary is just to know the moving distance of a piston. However, when a small amount of liquid is administered over a long period of time, it is difficult to visually determine the movement distance of the piston because the change in the movement distance of the piston is small. In such a liquid flow path, it is effective that the droplets dripped from the inlet are enlarged and reflected on the magnifier.

  In addition, as an infusion device, in the configuration of the infusion device described above, the pump is configured by an infuser pump made of an elastic bag body, and the liquid stored in the elastic bag body is driven by the elastic restoring force of the elastic bag body as a driving means. What supplies to a drip pipe | tube via a flow path is possible. In the infuser pump, the change in the weight of the elastic bag containing liquid corresponds to the flow rate of the liquid. For this reason, in order to confirm the flow of the liquid in a flow path, what is necessary is just to know the change of the weight of the elastic bag body containing a liquid. However, when a small amount of liquid is administered over a long period of time, since the change in the weight of the elastic bag containing liquid is small, it is difficult to visually recognize the change in the weight of the elastic bag containing liquid. Even in such a liquid flow path, it is effective that the droplets dripped from the inlet are enlarged and reflected on the magnifier.

  An embodiment of an infusion tube according to the present invention will be described with reference to FIGS. FIG. 1 shows an infusion device 22 having an infusion tube 10. The infusion device 22 is provided in a medical infusion line for administering a liquid such as a medical solution to a patient. The infusion tube 10, a syringe pump 20 that supplies the liquid to the infusion tube 10, a syringe pump 20, An upstream infusion tube 40a connecting the infusion tube 10 and a downstream infusion tube 40b extending from the downstream end of the infusion tube 10 to the patient side are provided. The syringe pump 20 is configured by mounting a syringe 21 including a cylinder 21b and a piston 21a on a pump main body 20a as a drive unit.

  Then, by driving the pump body 20a and moving the piston 21a as shown by a two-dot chain line in FIG. 1, the liquid contained in the cylinder 21b is allowed to flow through the infusion tube 10a via the upstream infusion tube 40a. It is comprised so that it may supply. As shown in FIGS. 2 to 4, the drip tube 10 includes a cylindrical container 11 having a transparent cylindrical body 11 a and a lid 11 b. The cylindrical main body 11a is formed in a cylindrical shape having an open upper end and a lower end narrowed in a mortar shape, and a flange portion 11c is provided on the outer periphery of the upper end opening.

  The lid 11b is formed of a shallow cylindrical body with a lower end opened, and a flange portion 11d is provided on the outer periphery of the lower end. By joining the flange portion 11d to the flange portion 11c, the cylindrical body 11a and the lid 11b are assembled in a state where the upper end opening of the cylindrical body 11a is closed by the lid 11b. An opening 11e is formed at the center of the lid 11b, and a cylindrical inflow side connecting pipe 13 communicating with the opening 11e is connected to the upper end of the peripheral edge of the opening 11e. The inflow side connection pipe 13 protrudes upward from the lid 11b, and a cylindrical inflow side annular portion 13a is provided on the outer periphery of the inflow side connection pipe 13 so as to be coaxial with the inflow side connection pipe 13. .

  The inflow side annular portion 13 a is shorter than the inflow side connection pipe 13. And the lower end side of the upstream infusion tube 40a extends to the upper surface of the lid 11b so as to push the inflow side connecting pipe 13 into the inside, and the front end is pushed into the inflow side annular portion 13a in the vicinity of the lid 11b. . The upstream infusion tube 40a has an upstream end connected to the liquid feeding port 21c (FIG. 1) of the syringe 21 and a downstream end sandwiched between the inflow side connecting tube 13 and the inflow side annular portion 13a. A thin tubular drip tube 14 communicating with the opening 11e is connected to the lower end of the peripheral edge of the opening 11e. The drip tube 14 protrudes toward the inside lower side of the cylindrical body 11.

  The rush length of the drip tube 14 is set to about 1/3 of the axial length (vertical length) of the cylindrical body 11a. The drip tube 14 is formed with a small diameter, and the inner diameter is set to 0.5 mm. For this reason, only a very small amount of liquid can pass through. As described above, since the cylindrical body 11a is transparent, the inside of the cylindrical body 11a including the infusion tube 14 can be visually observed (FIG. 3). An outflow port 15 is formed at the lower end of the cylindrical body 11 a, and a cylindrical outflow side connection pipe 16 communicating with the outflow port 15 is connected to the lower end of the peripheral edge of the outflow port 15. The outflow connection pipe 16 protrudes downward from the lower end of the cylindrical body 11a, and a cylindrical outflow side annular portion 16a is provided on the outer peripheral side of the outflow connection pipe 16 so as to be coaxial with the outflow side connection pipe 16. It has been.

  The outflow side annular portion 16 a is shorter than the outflow side connecting pipe 16. Then, the upstream end of the downstream infusion tube 40b extends to the lower end of the cylindrical body 11a so as to push the outflow side connecting pipe 16 into the inside, and the tip end portion of the downstream side annular part 16a is near the cylindrical body 11a. It is pushed inside. Thus, the downstream side infusion tube 40b is sandwiched between the outflow side connection pipe 16 and the outflow side annular portion 16a, and the downstream side extends toward the patient. And the puncture needle which punctures a patient's body is connected to the downstream end of the downstream infusion tube 40b. Thus, the syringe pump 20 and the drip tube 10 communicate with each other via the upstream infusion tube 40a, and the drip tube 10 and the puncture needle communicate with each other via the downstream infusion tube 40b.

  Therefore, the infusion supplied by the syringe pump 20 is dropped into the cylindrical body 11 from the tip of the infusion tube 14 through the opening 11e through the upstream infusion tube 40a. An inflow port 12 (dropping port) into the liquid cylinder 11 is formed at the tip of the drip tube 14. In this case, a certain amount of liquid is stored on the lower side in the cylinder 11, and the upper side in the cylinder 11 is adjusted so as to be a space, and from the tip of the drip tube 14 into the cylinder 11. The same amount of liquid as the dropped liquid passes through the outlet 15. The liquid that has passed through the outflow port 15 is supplied to the patient's body from the puncture needle via the downstream infusion tube 40b. According to the syringe pump 20, the change in the moving distance of the piston 21a corresponds to the infusion volume, and the infusion volume per unit time can be varied by changing the moving speed of the piston 21a.

  A magnifying glass 17 is attached to the upper part of the outer peripheral surface of the cylindrical body 11a by bonding. In FIG. 2, the longitudinal section of the magnifying glass 17 is shaded. The magnifying glass 17 is formed of a convex lens having a circular shape (FIG. 4). From the central part of the cylindrical body 11a in the axial direction (vertical direction) so that the tip of the drip tube 14 is reflected in the central part of the magnifying glass 17. It is provided over the flange portion 11c of the body main body 11a. The upper end portion of the magnifying glass 17 bites into the flange portion 11c of the cylindrical body 11a in a crescent shape. This magnifier magnifies and projects the tip of the drip tube 14 and the liquid droplets collected at the tip thereof to approximately 5 times (preferably 3 to 5 times).

  Therefore, as shown in FIG. 5, it is possible to accurately indicate the state where the liquid droplets are accumulated at the distal end portion of the infusion tube 14 in a state where the liquid droplets are not accumulated or the distal end portion of the infusion tube 14 as shown in FIG. Can be observed. The inflow side connecting tube 13, the drip tube 14 and the inflow side annular portion 13a can be formed integrally with the lid 11b, and the outflow side connecting tube 16 and the outflow side annular portion 16a can be formed integrally with the cylindrical body 11a. . As a material for the drip tube 10 including the magnifying glass 17, for example, a synthetic resin such as polypropylene (PP), polyvinyl chloride (PVC), polycarbonate (PC), or polymethyl methacrylate (PMMA) can be used. is there. In addition, the magnifying glass is not bonded, and can be provided by integral molding with the cylindrical body at any location of the cylindrical body.

  Next, the operation of this embodiment will be described. First, liquid is stored in the cylinder 21b of the syringe pump 20, and a predetermined puncture needle is connected to the downstream end of the downstream infusion tube 40b. Next, the syringe pump 20 is operated to drop liquid from the tip of the puncture needle, and it is confirmed that there is no air other than the upper side in the cylinder 11 in the infusion line. Then, once the operation of the syringe pump 20 is stopped, the puncture needle is punctured into a predetermined part of the patient's body, and the syringe pump 20 is operated again. As a result, the piston 21a moves and the liquid in the cylinder 21b is sent out to the upstream tube 40a.

  The liquid flows from the upstream infusion tube 40a into the infusion tube 14 through the inflow side connecting tube 13 and the opening 11e. Then, the liquid is dropped into the cylindrical body 11 as a drop from the tip of the drip tube 14 every predetermined time. At the same time, an amount of liquid equal to the amount of one dropped from the liquid accumulated on the lower side of the cylinder 11 flows through the outlet 15 to the downstream infusion tube 40b. The liquid that has flowed into the downstream infusion tube 40b is administered to the patient in small amounts via the puncture needle. At that time, first, as shown in FIG. 5 (the state in which there is no drip droplet at the tip of the drip tube 14), the tip of the drip tube 14 is enlarged (the magnifier 17a shown enlarged in FIG. 5). (See the drip tube 14a shown in FIG. 4).

  Next, as shown in FIG. 6 (the state in which there is drip droplets at the tip of the drip tube 14), the drip particles 18 accumulated at the tip of the drip tube 14 are enlarged (the magnifier shown enlarged in FIG. 6). 17a) and the magnifying glass 17. Further, the state in which the droplets 18 accumulated at the tip of the infusion tube 14 gradually increase and the state in which the droplets 18 are dripped from the tip of the infusion tube 14 can be magnified and observed by the magnifying glass 17. . In this way, it is easy to visually observe the fluctuations of the dripped droplets 18 as the tip of the drip tube 14 and the droplets 18 are enlarged by the magnifier 17.

  The shape change of the drip droplet 18 generated at the tip of the drip tube 14 until the drip droplet 18 is dropped and the dripping drip 18 itself can be visually observed without overlooking. The amount of infusion per unit time (for example, 1 minute) is determined from the volume of one drop by measuring the number of drops per unit time (for example, 1 minute) by observing the fluctuation of the instilled droplet 18 through the magnifying glass 17. Can be measured. Moreover, the flow of the infusion in the infusion channel 40 can be confirmed (confirmation of whether or not the liquid is flowing). The smaller the number of infusions and the thinner the infusion tube 14, the more effective the infusion tube 10 and the infusion device 22 according to this embodiment.

  In this embodiment, based on the infusion volume per unit time measured by measuring the number of infusions, the moving speed of the piston 21a can be adjusted to manage the infusion volume (dose) per unit time. According to this, the infusion can be supplied with higher accuracy than the conventional gravity drop type (natural dripping type) drip device that suspends the infusion bag and supplies the infusion. According to the gravity drop type infusion device, there are for 20 drops for dropping 20 drops per minute and for 60 drops for dropping 60 drops, and the administration rate (infusion rate) is every 1 milliliter. For example, when a pressurizing agent, a high-pressure agent or an anesthetic is administered in a minute amount over a long period of time, a gravity drop type infusion device is not suitable.

  When administering a vasopressor, high-pressure agent, anesthetic, etc., the administration rate is from 0.1 milliliter per hour (0.1 ml / h) to 20 milliliter per hour, such as 1 milliliter per hour (1 ml / h). (20 ml / h) may be extremely slow. In such a case, by using the infusion device 22 that can control the infusion amount (dosage) per unit time by adjusting the moving speed of the piston 21a. Accurate liquid supply becomes possible. In addition, when a small amount of liquid is administered for a long time, it is difficult to know the moving distance of the piston 21a because the moving distance of the piston 21a is short. Further, since the instilled droplets 18 can be enlarged and observed, the number of infusions can be measured to measure the amount of infusion, and the flow of the infusion can be confirmed.

  FIG. 7 shows an infusion device 32 according to another embodiment of the present invention. In the infusion device 32, an infuser pump 31 is used as a pump, and the configuration of the portion other than the infuser pump 31 is the same as that of the infusion device 22 described above. The infuser pump 31 is configured by accommodating an elastic bag 30 that can be expanded and contracted inside a container 31a. And the opening is provided in the upper surface center of the container 31a, and the liquid feeding port 30a of the elastic bag body 30 is attached to this opening. The liquid feeding port 30a is connected to the upstream end of the upstream side infusion tube 40a via the liquid feeding valve 32b, and the amount of infusion per unit time can be varied by changing the opening degree of the liquid feeding valve 32b.

  That is, in a state where the elastic bag 30 is inflated by putting a liquid in the elastic bag 30. When the liquid feeding valve 32b is opened, the liquid in the elastic bag body 30 is discharged to the outside by the restoring force of the elastic bag body 30, and the discharge amount at this time can be adjusted by the opening degree of the liquid feeding valve 32b. it can. In the infuser pump 31, the infusion amount can be known from the change in the weight of the elastic liquid 30. Therefore, when the liquid is put into the elastic bag 30 and the liquid supply valve 32b is opened according to the infusion volume, the elastic bag 30 is caused by its own elastic restoring force, as shown by a two-dot chain line in FIG. And the infusion contained in the elastic bag 30 flows into the upstream infusion tube 40a.

  Then, the infusion is supplied to the patient's body through the drip tube 10 and the downstream infusion tube 40b. Also in this case, like the syringe pump 20 described above, it is preferable to use when a pressurizing agent, a high-pressure agent, an anesthetic or the like is administered in a trace amount over a long period of time. This drip device 32 has a simple structure and is inexpensive. Other functions and effects of the drip device 32 are the same as the functions and effects of the syringe pump 20 described above.

  The present invention is not limited to the above embodiment, and various forms are possible. For example, in the above-described embodiment, the infusion path for a chemical solution and the like and the infusion path supplied by the syringe pump 20 and the infuser pump 31 are described, but the present invention is not limited to these. In the case of blood transfusion, it is possible to use the infusion tube and the infusion device according to the present invention. In addition, as the pump, a pump other than the syringe pump 20 and the infusor pump 31, for example, an infusion pump that supplies an infusion tube so as to be sandwiched and pushed by a roller can be used. Moreover, it is possible to use a gravity drop type drip device that does not use a pump, and it is possible to use other various liquid supply means.

  In the above embodiment, the infusion tube 14 is provided so as to enter the cylinder 11, and the liquid is dropped into the cylinder 11 from the tip of the infusion tube 14, and the inlet 12 is provided at the tip of the infusion tube 14. Although formed, it is not limited to it. For example, with reference to FIG. 2, it is assumed that there is no drip tube 14 that enters the cylindrical body 11, and the liquid is dripped directly into the cylindrical body 11 from the opening 11e, and the opening 11e serves as an inflow port. (In this case, the entire cylinder 11 including the lid 11b can be made transparent so that the opening 11e in the cylinder 11 can be seen from the outside of the cylinder 11). In any case, it is only necessary that the inlet can be magnified by the magnifier.

It is a front view which applies and shows the infusion tube of one Embodiment of this invention to the infusion path supplied with a syringe pump. It is a longitudinal cross-sectional view of the drip tube of this embodiment. It is a side view of the drip tube of this embodiment. It is a front view of the drip tube of this embodiment. It is a figure which shows one state about the infusion tube of this embodiment. It is a figure corresponding to FIG. 5 which shows another state. It is a front view applied and shown to the infusion path supplied with an infuser pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Drip tube, 11 ... Tube, 11e ... Opening, 14 ... Drip tube, 12 ... Inlet, 15 ... Outlet, 20 ... Syringe pump, 30 ... Elastic bag, 31 ... Infuser pump.

Claims (4)

In a drip tube that has an inlet at one end and an outlet at the other end, and in which liquid is dropped into the cylinder from the inlet,
An infusion cylinder comprising a magnifying mirror provided on an outer periphery of the cylinder and magnifying the inlet.   The infusion tube according to claim 1, wherein the inflow port is formed at a distal end portion of an infusion tube provided so as to enter the inside of the cylinder.   The drip tube according to claim 1 or 2, wherein a flow rate of the liquid dropped from the inlet is 0.1 ml / h to 20 ml / h.   A drip device comprising the drip tube according to any one of claims 1 to 3, wherein the drip device is connected to the inflow port via a flow path and contains the liquid therein, An infusion device comprising a pump comprising a driving means for supplying the liquid in the liquid container to the infusion tube through the flow path.

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