WO2014118944A1 - Intravenous drip probe and infusion pump provided with intravenous drip probe - Google Patents

Abstract

[Problem] To provide: an intravenous drip probe which is capable of detecting whether the probe is mounted upside-down on a drip chamber and of detecting a phenomenon where a drug dripping in the drip chamber splashes on the surface of the drug remaining inside the drip chamber so as to determine the accurate number of drops of the drug; and an infusion pump which is provided with the intravenous drip probe. [Solution] An intravenous drip probe (900) is used for an infusion pump (1) and is mounted on a drip chamber (810) to detect drops of the drug inside the drip chamber (810). The intravenous drip probe (900) comprises: a main body part (901); a first sensor part (951) which is disposed inside the main body part (901) upstream with respect to the direction of dripping of the drug (750) inside the drip chamber (810) and detects drops of the drug; and a second sensor part (952) which is disposed inside the main body part (901) downstream of the first sensor part (951) with respect to the direction of dripping of the drug inside the drip chamber (810) and detects drops of the drug.

Description

Infusion pump comprising an infusion probe and an infusion probe

The present invention relates to an infusion probe attached to an infusion set of an infusion pump for delivering a drug to a patient, and an infusion pump including the infusion probe.

The infusion pump is used in, for example, an intensive care unit (ICU) and the like, and is used to perform a liquid feeding treatment for a patient for a long time with high accuracy. A predetermined drug bag (infusion bag) is arranged on the infusion pump, and an infusion tube lowered from the drug bag is sandwiched between the main body and the door, and the infusion tube is accommodated in the main body. The door is held by closing the door. In the main body of the infusion pump, the outer peripheral surface of the infusion tube set at a fixed position is sandwiched between a plurality of fingers in the main body and the inner surface of the door. This infusion pump is a peristaltic infusion pump that sequentially pushes the outer peripheral surface of an infusion tube along the length direction by operating a drive motor to deliver a medicine (Patent Document 1). reference).
In this peristaltic infusion pump, the number of infusions dropped from the infusion bag is measured by an infusion probe. This infusion probe is detachably attached to an infusion tube connected to the infusion bag. By controlling the number of rotations of the motor of the drive unit in the infusion pump so that the number of drops of the drug measured by the drip probe becomes a predetermined number of drops, the drug stored in the infusion bag is converted into an infusion tube. The drug is instilled into the patient by being pumped by the infusion pump.

Japanese Patent No. 3267404

However, the medical staff may wear this drip probe upside down with respect to the drip tube. In addition, when a drug is dropped in the drip tube, the dropped drug may bounce off the liquid level of the drug accumulated in the drip tube, and the drip probe also detects the drug bounced off the liquid level. End up. For this reason, the infusion pump cannot obtain information on the correct number of drops of medicine, and the infusion pump may not be able to deliver the correct amount of medicine to the patient.
Therefore, the present invention can detect that the medicine is mounted upside down with respect to the drip cylinder, and the drug dripped in the drip cylinder is a rebound phenomenon from the liquid surface of the drug accumulated in the drip cylinder as a droplet. It is an object of the present invention to provide an infusion pump including an infusion probe and an infusion probe that can grasp the correct number of drops of medicine without counting.

The infusion probe of the present invention is used in an infusion pump for delivering a medicine in a medicine container to a patient through an infusion cylinder and an infusion tube, and is attached to the infusion cylinder to detect dripping of the medicine in the infusion cylinder. An infusion probe that comprises a main body, a first sensor that is disposed upstream of the infusion tube in the infusion tube and detects the infusion of the medicine, and the main body And a second sensor unit that is disposed on the downstream side of the first sensor unit with respect to the dropping direction of the medicine in the drip tube and detects the dropping of the medicine.
With the above configuration, when the drip probe is attached to the drip tube in a normal posture, the second sensor unit can detect the dropping of the drug after the first sensor unit detects the dropping of the drug. There is a time difference between the second sensor unit and the second sensor unit detecting the dropping of the medicine. For this reason, if the infusion probe is mounted incorrectly upside down, after the second sensor unit detects the dropping of the drug, the first sensor unit detects the dropping of the drug. For this reason, it can be detected that it is mounted upside down with respect to the drip tube.
In addition, when the drip probe is attached to the drip tube in a normal posture, the phenomenon in which the drug dropped in the drip tube rebounds on the liquid level of the drug accumulated in the drip tube occurs. After the sensor unit detects the drug that has bounced back, the first sensor unit detects the drug that has bounced back. For this reason, even if there is a drug that has bounced in this way, only when the first sensor detects the drop of the drug after the first sensor detects the drop of the drug, the number of drops as a correct drop of the drug is determined. I can grasp it.

Preferably, the first sensor unit includes a first light emitting unit that generates first light, and a first light receiving unit that receives the first light that has passed through the drip tube, and the second sensor unit includes: And a second light emitting part for generating the second light and a second light receiving part for receiving the second light that has passed through the drip tube.
With the above configuration, it is only necessary to use the first sensor unit and the second sensor unit, which are optical sensors, and an increase in the size of the drip probe can be avoided.

Preferably, the infusion pump outputs a first detection signal output from the first light receiving unit when the dropping of the drug is detected and a second detection signal output from the second light receiving unit when the dropping of the drug is detected. It is characterized by being configured to send by wire.
With the above configuration, it is possible to send a detection signal by wire from the infusion probe to the infusion pump.

Preferably, the infusion pump outputs a first detection signal output from the first light receiving unit when the dropping of the drug is detected and a second detection signal output from the second light receiving unit when the dropping of the drug is detected. It is characterized in that it is configured to send to the side wirelessly.
With the above configuration, a detection signal can be transmitted wirelessly from the infusion probe to the infusion pump.

Preferably, the main body portion moves relative to the first case portion and the first case portion and sandwiches the drip tube together with the first case portion, whereby the main body portion is attached to the drip tube. The infusion probe according to claim 1, further comprising: a second case part that is detachably fixed; and a display lamp that is disposed on the main body part and displays that the dripping of the medicine is detected.
With the above configuration, the display lamp can notify the medical staff that the dropping of the medicine has been detected while the main body of the infusion probe is detachably attached to the infusion tube.

The infusion pump of the present invention has the infusion probe.
With the above configuration, when an infusion probe is used for an infusion pump, it can be detected that the body of the infusion probe is mounted upside down with respect to the infusion tube, and the drug dripped in the infusion tube accumulates in the infusion tube. It is possible to detect the phenomenon of rebounding on the liquid level of the drug, and to grasp the correct number of drops of the drug.

The present invention can detect that the medicine is mounted upside down with respect to the infusion tube, and detects a phenomenon in which the medicine dropped in the infusion tube rebounds on the liquid level of the medicine accumulated in the infusion tube. It is possible to provide an infusion pump including an infusion probe and an infusion probe that can grasp the number of drops.

The perspective view which shows preferable 1st Embodiment of the infusion pump of this invention. The figure which looked at the infusion pump shown in Drawing 1 from the W direction. The perspective view which shows the state which opened the opening-and-closing cover of the infusion pump. The figure which shows the electrical structural example of an infusion pump. The figure which shows the liquid feeding drive part of a full press system which presses an infusion tube and delivers the chemical | medical agent in an infusion tube. The perspective view which shows an infusion pump and an infusion probe. The perspective view which shows an infusion probe. The front view of an infusion probe. The bottom view of an infusion probe. The figure which shows the drip probe with which the drip pipe | tube was mounted | worn. The figure which shows the preferable structural example of the optical sensor arrange | positioned in an infusion probe. The figure which shows the state in which the dropped droplet bounced off the liquid level LM. The figure which shows the state by which the drip probe is not mounted | worn with the correct direction (attitude | position) with respect to the drip tube, but the drip probe has been mounted | worn with the drip tube mistakenly up-down direction. The figure which shows 2nd Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.
(First embodiment)
FIG. 1 is a perspective view showing an infusion pump including an infusion probe which is a preferred first embodiment of the infusion pump of the present invention. FIG. 2 is a view of the infusion pump shown in FIG. 1 as viewed from the W direction.

The infusion pump 1 shown in FIGS. 1 and 2 is used, for example, in an intensive care unit (ICU, CCU, NICU) or the like, and is used for nutrition, such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusions, etc. This is a micro continuous infusion pump that is used to perform a micro infusion treatment of a drug such as an agent (also referred to as a drug solution) for a relatively long time with high accuracy. This infusion pump 1 is used, for example, for selecting a drug to be used from a drug library and feeding the selected drug. This drug library is drug information which is a drug administration setting group including drug names registered in advance in the drug library database (DB). By using this drug library, a medical worker does not have to perform complicated administration settings each time, and can select a drug and set a drug.

As shown in FIGS. 1 and 2, a part of the infusion tube 200 of the infusion set 800 including the drip tube 810, clamps (clamps) 802 a and 802 b, and the infusion tube 200 is attached to the tube attachment portion 50 of the infusion pump 1. Yes. The infusion set 800 communicates with a medicine bag 801 as a medicine container, and an infusion probe 900 is detachably attached to the infusion tube 810.
In this way, the medicine 750 filled in the medicine bag 801 passes through the drip tube 810 and the infusion tube 200 by the operation of the liquid feeding drive unit 60, and the indwelling needle (the distal end of which is placed in the vein of the patient P) ( Alternatively, the liquid can be accurately delivered from the vein of the patient P via the indwelling catheter 172.

The infusion pump 1 shown in FIGS. 1 and 2 has a main body cover 2 and a handle 2T, and the handle 2T can be extended in the N direction and stored in the T direction. The main body cover 2 is also called a main body, and is integrally formed of a molded resin material having chemical resistance, so that even if a drug or the like is applied, it can be prevented from entering the infusion pump 1. have. As described above, the main body cover 2 has the splash-proof treatment structure because the medicine 750 in the medicine bag 801 disposed above spills or disinfecting liquid used in the vicinity is scattered and attached. Because there is.

First, the elements disposed on the main body cover 2 of the infusion pump 1 will be described.
As shown in FIGS. 1 and 2, a display unit 3 and an operation panel unit 4 are arranged on the upper portion 2 </ b> A of the main body cover 2. The display unit 3 is an image display device, and uses, for example, a color liquid crystal display device. This display unit 3 can display not only information notation in Japanese but also information in a plurality of foreign languages as required. The display unit 3 is disposed on the upper left side of the upper portion 2 </ b> A of the main body cover 2 and above the opening / closing cover 5. The upper portion 2 </ b> A of the main body cover 2 is an upper half portion of the main body cover 2. The lower part 2 </ b> B of the main body cover 2 is a lower half part of the main body cover 2.

A display portion 3 for displaying information and an operation panel portion 4 having a plurality of operation buttons are arranged on the upper portion 2A of the body cover 2 of the infusion pump 1, and a lower portion 2B of the body cover 2 of the infusion pump 1 is This is a region where an infusion tube 200 which is a liquid feeding member for feeding a medicine is arranged. Thereby, the medical worker can perform the liquid feeding operation of the medicine by the infusion pump 1 while confirming the information on the display unit 3 of the upper portion 2A of the main body cover 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2. For this reason, the operability of the infusion pump 1 is good.

In FIG. 2, the display unit 3 includes, as an example, a display column 3B for a scheduled amount (mL) of drug administration, a display column 3C for an integrated amount (mL) of drug administration, a display column 3D for a charge history, and a flow rate (mL). Although the display column 3E and the like are displayed, the display contents of the display unit 3 shown in FIG. 1 are omitted for the sake of simplicity of the drawing. The scheduled amount of drug administration can be displayed even in “g system”. The display unit 3 can also display an alarm message.
The operation panel unit 4 is disposed on the right side of the display unit 3 in the upper part 2A of the main body cover 2, and the operation panel unit 4 includes, for example, a pilot lamp 4A, a fast-forward switch button 4B, and a start button as illustrated in FIG. A switch button 4C, a stop switch button 4D, a menu selection button 4E, a power switch 4F, and the like are arranged.

As shown in FIG. 1, an opening / closing cover 5 serving as a lid member is provided on the lower portion 2B of the main body cover 2 so as to be openable and closable in the R direction around a rotating shaft 5A. The open / close cover 5 is a plate-like lid member that is formed long along the X direction. The tube mounting part 50 and the liquid feeding drive part 60 are disposed inside the opening / closing cover 5. An infusion tube 200 made of a flexible thermoplastic resin such as soft vinyl chloride is set in the tube mounting portion 50, and the infusion tube 200 is connected to the tube mounting portion 50 by closing the open / close cover 5. , And can be mounted horizontally along the X direction (T direction).
Note that the X direction, the Y direction, and the Z direction in FIGS. 1 and 2 are orthogonal to each other, and the Z direction is the vertical direction. The X direction is parallel to the T direction, which is the liquid feeding direction, and is the left-right direction of the infusion pump 1. The Y direction is the front-rear direction of the infusion pump 1.

FIG. 3 is a perspective view showing a tube mounting portion 50 for opening the opening / closing cover 5 of the infusion pump 1 shown in FIGS. 1 and 2 and mounting the infusion tube 200.
As shown in FIG. 3, the tube mounting part 50 and the liquid feeding drive part 60 are provided on the main body lower part 1B side of the infusion pump 1, and the tube mounting part 50 and the liquid feeding drive part 60 are operated with the display part 3. A lower portion of the panel portion 4 is provided along the X direction. As shown in FIG. 2, the tube mounting portion 50 can cover the open / close cover 5 with the open / close cover 5 when the open / close cover 5 is closed in the CR direction around the rotation shaft 5A.

A medical worker can close the open / close cover 5 by attaching the infusion tube 200 to the tube attachment portion 50 while confirming information on the display portion 3 of the upper portion 2 </ b> A of the main body cover 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2. Thereby, in the medical field, the operativity of the infusion pump 1 can be improved.
As shown in FIG. 3, the tube mounting portion 50 includes a bubble sensor 51, an upstream blockage sensor 52, a downstream blockage sensor 53, a tube clamp portion 270, a first infusion tube guide portion 54 at the right side position, and a left side position. A second infusion tube guide portion 55 is provided.

As shown in FIG. 3, an infusion tube setting direction display unit 150 for clearly displaying the T direction that is the correct liquid feeding direction when the infusion tube 200 is set is provided in the vicinity of the tube mounting unit 50. ing. The infusion tube setting direction display unit 150 includes, for example, a plurality of arrows 151. The infusion tube setting direction display unit 150 is arranged to clearly indicate the correct liquid feeding direction (T direction) of the medicine 750 by the infusion tube 200 set inside the opening / closing cover 5. Accordingly, when the medical staff opens the opening / closing cover 5 of FIG. 3 in the CS direction, opens the tube mounting portion 50, and mounts the infusion tube 200 on the tube mounting portion 50, the infusion tube 200 It is possible to clearly indicate the T direction, which is the direction of drug delivery. For this reason, it can prevent reliably that a medical worker will attach the infusion tube 200 by the reverse direction accidentally.

Next, a structural example of the opening / closing cover 5 shown in FIG. 3 will be described.
As shown in FIG. 3, the open / close cover 5 is a plate-like member made of a thin molded resin member in order to reduce the weight of the infusion pump 1. Thereby, the weight of the opening / closing cover 5 can be reduced, and the structure can be simplified. The opening / closing cover 5 has two hinge portions 2H and 2H that allow the tube mounting portion 50 to be covered so as to be openable and closable along the CS direction and the CR direction about the rotation shaft 5A. It is supported with respect to the main body lower part 2B. The two hinge portions 2H and 2H are arranged corresponding to the first hook member 5D and the second hook member 5E, respectively.

As shown in FIGS. 2 and 3, an opening / closing operation lever 260 is provided at the upper right portion on the surface side of the opening / closing cover 5. On the inner surface side of the opening / closing cover 5, an infusion tube pressing member 500, a first hook member 5D, and a second hook member 5E are provided. The infusion tube pressing member 500 is disposed as a long rectangular and planar protrusion along the X direction, and the infusion tube pressing member 500 is in a position facing the liquid feeding drive unit 60. The infusion tube pressing member 500 has a flat surface in the X direction along the liquid feeding drive unit 60, and the infusion tube pressing member 500 closes the opening / closing cover 5 in the CR direction, A part of the infusion tube 200 is pressed between them.
The medical worker can set the infusion tube 200 on the lower half of the body of the infusion pump 1 along the horizontal direction while confirming the display content displayed on the display unit 3, and the infusion tube 200 is connected to the tube mounting portion. After being set to 50, the opening / closing cover 5 can cover the infusion tube 200.

As shown in FIG. 3, the first hook member 5D and the second hook member 5E are mechanically simultaneously engaged with the fixing portions 1D and 1E on the lower body 1B side, so that the open / close cover 5 is As shown, the tube mounting part 50 of the main body lower part 1B is held in a closed state. The first hook member 5D, the second hook member 5E, and the fixing portions 1D, 1E on the main body lower part 1B side constitute a double hook structure portion 300 of the opening / closing cover 5.
The tube clamp part 270 shown in FIG. 3 closes the open / close cover 5 to clamp and close the middle part of the infusion tube 200. The tube clamp portion 270 is disposed in the vicinity of the left fixed portion 1E and at a position corresponding to the left second hook member 5E. When the medical worker sets the infusion tube 200 horizontally in the X direction and the medical worker closes the opening / closing cover 5 in the CR direction, the tube clamp portion 270 can block a part of the infusion tube 200 in the middle.

As shown in FIG. 3, the first infusion tube guide portion 54 can be held by fitting the upstream side 200 </ b> A of the infusion tube 200, and the second infusion tube guide portion 55 can be held by fitting the downstream side 200 </ b> B of the infusion tube 200. The infusion tube 200 can be held horizontally along the X direction. Thus, the infusion tube 200 held in the horizontal direction is in the T direction along the bubble sensor 51, the upstream block sensor 52, the liquid feed drive unit 60, the downstream block sensor 53, and the tube clamp unit 270. It is fixed by fitting along.

As shown in FIG. 3, the second infusion tube guide portion 55 is a groove portion formed in the side surface portion 1 </ b> S of the main body lower portion 1 </ b> B in order to detachably hold a part of the downstream side 200 </ b> B of the infusion tube 200. is there. The first infusion tube guide portion 54 and the second infusion tube guide portion 55 are provided in the tube attachment portion 50 so that the infusion tube 200 is not sandwiched between the opening / closing cover 5 and the tube attachment portion 50 and crushed. Can be installed securely.
The bubble sensor 51 shown in FIG. 3 is a sensor that detects bubbles (air) generated in the infusion tube 200. For example, the bubble sensor 51 flows into the infusion tube 200 from the outside of the infusion tube 200 such as soft vinyl chloride. It is an ultrasonic sensor that monitors bubbles contained in a medicine. By applying ultrasonic waves generated from the ultrasonic wave transmitter of the ultrasonic sensor to the drug flowing in the infusion tube 200, the ultrasonic wave transmittance in the drug and the ultrasonic wave transmittance in the bubbles are different. The receiving unit monitors the presence or absence of bubbles by detecting the difference in transmittance. The bubble sensor 51 has a pressing member 320 and a receiving member 330. The ultrasonic oscillator is disposed on the pressing member 320. The ultrasonic wave receiver is disposed on the receiving member 330.

The upstream blockage sensor 52 shown in FIG. 3 is a sensor that detects whether or not the inside of the infusion tube 200 is blocked on the upstream side 200A of the infusion tube 200, and the downstream blockage sensor 53 is an infusion solution on the downstream side 200B of the infusion tube 200. It is a sensor that detects whether or not the inside of the tube 200 is closed. The upstream occlusion sensor 52 and the downstream occlusion sensor 53 have substantially the same configuration, but the upstream occlusion sensor 52 detects the degree of dent of the infusion tube 200 since the infusion tube 200 was first set in the tube mounting portion 50. On the other hand, the downstream blockage sensor 53 detects whether or not the inside of the infusion tube 200 is blocked by detecting the degree of swelling of the infusion tube 200 from when the infusion tube 200 is first set in the tube mounting portion 50. Is detected. The main cause of the blockage of the infusion tube 200 is, for example, forgetting to open the clamp 802a (the state where the clamp on the upstream side of the infusion pump 1 is closed: a dent from when the infusion tube 200 is set). State), forgetting to open the clamp 802b (the state where the clamp on the downstream side of the infusion pump 1 is closed: the state in which the infusion tube 200 has been swollen since the infusion tube 200 was set), the collapse of the infusion tube 200, Kink (bending), and other cases include cases where the viscosity of the drug to be fed is high or the concentration of the drug is high.
As shown in FIG. 3, pressing members 452 and 453 are provided on the inner surface side of the opening / closing cover 5 at positions corresponding to the upstream closing sensor 52 and the downstream closing sensor 53, respectively. When the medical worker sets the infusion tube 200 in the tube mounting portion 50 as shown in FIG. 3 and then closes the opening and closing cover 5 as shown in FIG. 2, the pressing member 452 and the pressing member 453 on the opening and closing cover 5 side A part of the infusion tube 200 can be pressed against the upstream blockage sensor 52 and the downstream blockage sensor 53 side, respectively.

As shown in FIG. 4, the infusion pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.
A temperature sensor 180, an open / close cover (open / close door) sensor 190, and an infusion probe 900 are electrically connected to the control unit 100. The temperature sensor 180 measures the temperature of the environment where the infusion pump 1 is placed and sends a temperature measurement signal TSS.
The opening / closing cover sensor 190 sends an opening / closing cover opening / closing signal CRS to the control unit 100 when the opening / closing cover 5 shown in FIG.

The infusion probe 900 shown in FIGS. 4 and 2 is detachably attached to the infusion tube 810 of the medicine bag 801 shown in FIG. 2 to detect the dropping state of the medicine 750, and will be described later. The light quantity change detection signal PS1 and the second light quantity change detection signal PS2 are sent to the control unit 100. That is, the drip probe 900 monitors the dropping state of the medicine 750 in the drip cylinder 810, and detects abnormalities in the flow of the medicine 750 detected abnormally, such as a free flow (continuous flow) and an empty liquid (out of liquid). It has a function that can notify a person with an alarm. In addition, the control unit 100 supplies a power source PW to the infusion probe 900. The structure and function of the drip probe 900 will be described in detail later.

The control unit 100 shown in FIG. 4 is connected to a power switch button 4F and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the rechargeable battery 113 by switching between the power converter unit 112 and the rechargeable battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114.

The display unit driver 130 shown in FIG. 4 drives the display unit 3 according to a command from the control unit 100, and displays information contents and alarm messages exemplified in FIG. The speaker 131 can notify various alarm contents by voice according to a command from the control unit 100. The buzzer 132 can notify various alarms by sound according to commands from the control unit 100.
When there is an abnormality detection of the dropping state of the medicine 750 in the infusion tube 810 by the infusion probe 900, the display unit driver 130 drives the display unit 3 according to a command from the control unit 100, and a warning message “Drip abnormality”. Is displayed. When there is an abnormality detection of the dropping state of the medicine 750 in the infusion tube 810 by the infusion probe 900, the speaker 131 can give a warning “abnormality of dripping” by voice. Similarly, the buzzer 132 can issue an alarm sound in response to a command from the control unit 100 when an abnormality is detected in the dropping state of the medicine 750 in the infusion tube 810 by the infusion probe 900.

In FIG. 4, the bubble detection signal S <b> 1 from the bubble sensor 51, the upstream block signal S <b> 2 indicating that the upstream side of the infusion tube 200 from the upstream block sensor 52 is blocked, and the downstream of the infusion tube 200 from the downstream block sensor 53. A downstream block signal S3 indicating that the side is blocked is supplied to the control unit 100. The upstream blockage sensor 52 and the downstream blockage sensor 53 can detect a state in which the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 and the medicine cannot be delivered. The reason why the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 is that the infusion tube or the infusion tube 200 is clogged if the clamp 802b is forgotten to be opened (the clamp is kept closed) or the infusion needle for infusion or the infusion tube 200 is clogged. For example, when 200 crushes or kinks (bending) or a high viscosity drug is used.

In FIG. 4, the control unit 100 can communicate bidirectionally with a computer 141 such as a desktop computer through the communication port 140. This computer 141 is connected to a drug database (DB) 160, and drug information MF stored in the drug database 160 is acquired by the control unit 100 via the computer 141, and the non-volatile state of the control unit 100 is acquired. It can be stored in the memory 103. The control unit 100 can display the drug information MF and the like on the display unit 3 shown in FIG. 2, for example, based on the stored drug information MF.

4 includes a drive motor 61, a cam structure 62 having a plurality of cams that are rotationally driven by the drive motor 61, and a plurality of cam structures 62 that are moved by the cams of the cam structure 62. A finger structure 63 having a plurality of fingers is provided. As the drive motor 61, a step motor is used.
The cam structure 62 has a plurality of cams, for example, a plurality of cams 62A to 62F, and the finger structure 63 has a plurality of fingers 63A to 63F corresponding to the plurality of cams 62A to 62F. . The plurality of cams 62A to 62F are arranged with a phase difference from each other, and the cam structure 62 is connected to the output shaft 61A.

When the output shaft 61A of the drive motor 61 rotates in response to a command from the control unit 100 shown in FIG. 4, the plurality of fingers 63A to 63F sequentially advance and retreat by a predetermined stroke in the Y direction, so that the infusion tube 200 extends along the T direction. Then, it is pressed against the infusion tube pressing member 500 of the opening / closing cover 5. For this reason, the medicine in infusion tube 200 can be sent in the T direction. That is, the plurality of fingers 63A to 63F are individually driven sequentially, so that the plurality of fingers 63A to 63F sequentially move in a place where the outer peripheral surface of the infusion tube 200 is sequentially pressed along the T direction and completely closed. By doing so, the drug in the infusion tube 200 is fed. In this way, the sub-control unit 400 controls the peristaltic motion of the plurality of fingers 63A to 63F, thereby causing the fingers 63A to 63F to move forward and backward in sequence, so that the wave is advanced, and the infusion tube 200 is completely moved. By moving the portion to be blocked in the T direction, the infusion tube 200 can be squeezed and the drug can be delivered in the T direction (ie, in FIG. 5, (A) → (B) → (C) → ( D) → (E) → (F) → (A) is repeated).

Next, referring to the schematic diagram of FIG. 5, the liquid feeding drive unit 60 is a full press system (a system in which a plurality of fingers 63A to 63F sequentially and completely close the infusion tube 200 to deliver a medicine). An example will be described in which the finger structure 63 sends the medicine 750 in the infusion tube 200 by pressing the infusion tube 200.
5 (A) to 5 (D) show that the drug 750 is moved by pressing the inside of the infusion tube 200 by moving the infusion tube 200 in the T direction and moving the completely closed portion in the T direction. The liquid supply drive part 60 which supplies liquid is shown.

5A, the infusion tube 200 is completely closed by the fingers 63F and 63A, and in FIG. 5B, the infusion tube 200 is completely closed by the fingers 63E and 63F. In (C), the infusion tube 200 is completely closed by the fingers 63D and 63E. Furthermore, in FIG. 5 (D), the infusion tube 200 is completely closed by the fingers 63C and 63D. In (E), the infusion tube 200 is completely closed by fingers 63B and 63C, and in FIG. 5 (F), the infusion tube 200 is completely closed by fingers 63A and 63B. Thereafter, the state returns to the state of FIG.
It should be noted that the fingers 63A and 63F at both ends may preferably have a rounded patent at the tip so that the infusion tube 200 can be more completely closed.

Next, a preferred structure example of the drip probe 900 will be described with reference to FIGS.
FIG. 6 is a perspective view showing the infusion pump 1 and the drip probe 900. FIG. 7 is a perspective view showing the drip probe 900. FIG. 8 is a front view of the drip probe 900, and FIG. 9 is a plan view of the drip probe 900. FIG. 10 is a view showing an infusion probe 900 attached to the infusion tube 810.
As shown in FIG. 6, the drip probe 900 has a main body 901, a connection plug 902, and a cord 903. The connection plug 902 is electrically connected to a circuit board in the main body 901 using a cord 903. The connection plug 902 can be detachably connected to the connection connector 899 on the back side of the infusion pump 1. As a result, as shown in FIG. 4, the drip probe 900 can detect the dropping state of the medicine 750 by wire and send the first light amount change detection signal and the second light amount change detection signal to the control unit 100. In addition, the control unit 100 supplies the power supply PW to the drip probe 900.

As shown in FIG. 7, the main body 901 of the drip probe 900 has a first case portion 911, a second case portion 912, and a drip detection display lamp 913, and the weight is about 20 g. The first case portion 911 and the second case portion 912 are made of plastic, for example. The first case portion 911 is also referred to as an outer case, and the second case portion 912 is also referred to as an inner case.
First, the structure of the first case portion 911 will be described.
As shown in FIGS. 8 and 9, the first case portion 911 includes front portions 911A and 911B, a side surface portion 911C, a back surface portion 911D, an upper surface portion 911E, and a lower surface portion 911F. The front portions 911A and 911B, the side surface portion 911C, the back surface portion 911D, the upper surface portion 911E, and the lower surface portion 911F have an insertion space portion 911S for inserting the insertion portion 918 of the second case portion 912.

8 is provided in the front portion 911B. As shown in FIG. 2, the display portion 921 displays a correct wearing state diagram 911G so that the medical staff can attach the main body 901 of the drip probe 900 to the drip tube 810 in the correct vertical direction. is doing. Accordingly, when the medical staff attaches the main body 901 of the infusion probe 900 to the infusion tube 810, the correct wearing state diagram 911G can be referred to. Therefore, as shown in FIG. The main body 901 of 900 can be attached to the drip tube 810 in the correct vertical direction. In addition, the drip tube 810 is standardized into two types of 20 drops / mL (1 mL with 20 drops) and 60 drops / mL (1 mL with 60 drops).

As shown in FIGS. 7 to 9, the first case portion 911 is a substantially rectangular parallelepiped member. As shown in FIGS. 8 and 9, the drip tube 810 shown in FIG. 9 is inserted along the Z direction (vertical direction) over the front portions 911A and 911B, the upper surface portion 911E, and the lower surface portion 911F of the first case portion 911. Open portions 920 and 920 in the upper and lower positions for holding, a display portion 921, and a receiving portion 922 that receives a code 903. As shown in FIG. 9, the opening portions 920 and 920 at the upper and lower positions have an arc portion 920A and straight portions 920B and 920C, respectively. The drip tube 810 can be passed between the straight portions 920B and 920C. The arc portion 920 </ b> A is a portion that holds the outer peripheral surface of the drip tube 810.
As shown in FIGS. 7 and 9, the side surface portion 911 </ b> C is formed with a recess 911 </ b> H for a medical worker to apply a finger of a hand. In addition, as shown in FIG. 9, a long groove type slide guide portion 911K and a semicircular recess portion 911L are formed on the lower surface portion 911F.

Next, the structure of the second case portion 912 will be described.
As shown in FIGS. 7 to 9, the second case portion 912 includes an insertion portion 918 and a protruding portion 930 provided at an end portion of the insertion portion 918. As shown in FIGS. 8 and 9, the protruding portion 930 has a front surface portion 930A, a back surface portion 930B, a side surface portion 930C, an upper surface portion 930E, and a lower surface portion 930F. A drop detection display lamp 913 is provided on the front portion 930A. The side surface portion 930 </ b> C is formed with a recess 930 </ b> H for a medical worker to apply another finger of the hand. A cord 903 is led out from the take-out portion 930M of the lower surface portion 930F. On the back surface of the insertion portion 918 of the second case portion 912, a guide protrusion 918T is formed so as to protrude. The projecting portion 918T is fitted in the slide guide portion 911K of the first case portion 911.

As shown in FIG. 9, the insertion portion 918 of the second case portion 912 is accommodated in the insertion space portion 911 </ b> S of the first case portion 911. The insertion portion 918 has an opening portion 940 for inserting the drip tube 810. As shown in FIG. 9, the opening portion 940 has an arc portion 940C and straight portions 940A and 940B. The drip tube 810 can be passed between the straight portions 940A and 940B. The shape of the opening portion 940 of the insertion portion 918 of the second case portion 912 is the same size as the shape of the opening portion 920 of the first case portion 911, but the formed direction is opposite to the left and right. It has become.

As shown in FIG. 9, a protruding portion 930 is provided at one end portion of the insertion portion 918 of the second case portion 912, and the other end portion 918 </ b> H of the insertion portion 918 and the side surface portion of the first case portion 911. A spring 949 as an urging member is disposed between the inner surface 911W of 911C. The spring 949 pushes the insertion portion 918 of the second case portion 912 in the V1 direction. In such a state, since the opening portion 920 and the opening portion 940 are in a shifted position, the drip tube 810 cannot be inserted into the opening portion 920 and the opening portion 940.

However, as illustrated in FIG. 8, the medical staff applies the two fingers FG and FG of the hand to the concave portion 911 </ b> H of the first case portion 911 and the concave portion 930 </ b> H of the second case portion 912 and pushes them toward each other. Thus, the insertion portion 918 of the second case portion 912 enters the direction of entering the insertion space portion 911S of the first case portion 911, that is, the V2 direction against the force of the spring 949. At this time, since the protrusion 918T of the second case portion 912 shown in FIG. 9 can be guided by the slide guide portion 911K of the first case portion 911, the insertion portion 918 of the second case portion 912 is the first case portion 911. Enter smoothly in the V2 direction. As a result, the opening portion 920 and the opening portion 940 come closer to each other from the shifted position, so that the position of the arc portion 920A of the opening portion 920 and the position of the arc portion 940C of the opening portion 940 substantially coincide with each other. A drip tube 810 can be passed through 920 and the opening 940.

Then, the medical staff separates the two fingers FG, FG of the hand from the concave portion 911H of the first case portion 911 and the concave portion 930H of the second case portion 912, whereby the spring 949 is inserted into the second case portion 912. By pushing 918 against the first case portion 911 in the V1 direction, the force of the spring 810 presses the drip tube 810 into the opening portion 920 and the opening portion 940. Therefore, as shown in FIG. 10, the drip probe 900 has a function that can be attached to the drip tube 810 by pressing it against the outer peripheral surface using the force of the spring 949.

FIG. 10 shows a drug bag 801, an infusion tube 810, and an infusion probe 900 attached to the infusion tube 810 of the infusion set 800.
In FIG. 10, the drip probe 900 is detachably attached to the drip tube 810 in the correct direction (correctly attached state in the vertical direction). The infusion tube 810 has a transparent tube portion 810A, a lid member 810B, and an infusion port portion 810C so that light can pass through. The end portion of the infusion tube 200 is connected to the lower end portion 810F of the cylinder portion 810A. The lid member 810B closes the upper end opening of the cylinder part 810A, and an infusion port part 810C is provided in the cylinder part 810A at the lower part of the lid member 810B. The medicine 750 in the medicine bag 801 is, for example, a drop interval of 10 drops / minute from the drop opening 810C as a drop MS (in this case, for example, in the case of using a drop drop tube 810 of 20 drops / mL, the set flow rate of the medicine) Is set to 30 mL / h; when the 60 drop / mL infusion tube 810 is used, the set flow rate of the drug is set to 10 mL / h), the liquid level LM of the drug 750 in the cylinder portion 810A is It is intended to fall in the Z1 direction.

The infusion probe 900 shown in FIG. 10 detects the dropping state of the medicine 750 in the infusion tube 810, detects the dropping state of the medicine 750, and sends the first light quantity change detection signal and the second light quantity change detection signal to the wired line. And sent to the control unit 100. FIG. 11 shows a preferred configuration example of the optical detection unit 950 arranged in the drip probe 900.
As shown in FIG. 11, the optical detection unit 950 includes a first sensor unit 951, a second sensor unit 952, a first sensor unit 951, a second sensor unit 952, and substrates 953 and 954. . The first sensor unit 951 has a first light emitting unit 951A and a first light receiving unit 951B. The second sensor unit 952 includes a second light emitting unit 952A and a second light receiving unit 952B. The first light emitting unit 951A and the second light receiving unit 952B are mounted on the substrate 953 on the second case unit 912 side. The first light receiving portion 951B and the second light emitting portion 952A are mounted on the substrate 954 on the first case portion 911 side. The substrate 953 is fixed to the second case portion 912 side. The substrate 954 is fixed to the first case portion 911 side.

The first light emitting unit 951A and the first light receiving unit 951B are opposed to each other with the cylinder part 810A interposed therebetween so that the first light L1 generated by the first light emitting part 951A is received by the first light receiving part 951B through the cylinder part 810A. Are arranged. Similarly, the second light emitting part 952A and the second light receiving part 952B receive the cylindrical part 810A so that the second light L2 generated by the second light emitting part 952A is received by the second light receiving part 952B through the cylindrical part 810A. They are placed opposite to each other.

Both the first light emitting unit 951A and the second light emitting unit 952A employ light emitting diodes, for example. Both the first light receiving unit 951B and the second light receiving unit 952B employ photodiodes, for example. The first light emitting unit 951A and the second light emitting unit 952A emit light in response to a command from the control unit 100. When the first light receiving unit 951B and the second light receiving unit 952B receive the first light L1 and the second light L2, respectively. A first light amount change detection signal PS1 indicating a change in light amount due to the drop of the droplet MS generated by the first light receiving unit 951B, and a change in light amount due to the drop of the droplet MS generated by the second light receiving unit 952B. The second light quantity change detection signal PS2 shown is sent to the control unit 100. The first light L1 and the second light L2 are, for example, near infrared light.

Next, an operation example of the infusion pump 1 and the drip probe 900 described above will be described.
First, as shown in FIG. 6, the connection plug 902 is detachably connected to the connection connector 899 on the back side of the infusion pump 1. Thereby, as shown in FIG. 4, the drip probe 900 detects the dropping state of the medicine 750 and sends the first light quantity change detection signal PS1 and the second light quantity change detection signal PS2 to the control unit 100 of the infusion pump 1. be able to.
Next, it is confirmed that the type of the infusion set 800 including the infusion tube 810 shown in FIG. 2 is designated in advance so as to be applied to the infusion pump 1, and the preparation of the infusion set 800 and the infusion tube Priming 200. Then, the opening / closing cover 5 of the infusion pump 1 shown in FIG. 3 is opened in the CS direction, the tube mounting portion 50 is opened, the infusion tube 200 is mounted on the tube mounting portion 50, and then the opening / closing cover 5 is closed.

In the infusion pump 1, the setting of the dripping condition of the drug in the infusion pump 1 is matched with the dripping condition (20 drops / mL or 60 drops / mL) of the infusion set 800. The drip probe 900 is attached to the drip tube 810 of the infusion set 800. That is, as shown in FIG. 8, the medical staff applies the two fingers FG and FG of the hand to the concave portion 911 </ b> H of the first case portion 911 and the concave portion 930 </ b> H of the second case portion 912 and pushes them toward each other. . Accordingly, the insertion portion 918 of the second case portion 912 shown in FIG. 9 enters the insertion space portion 911S of the first case portion 911 into the V2 direction against the force of the spring 949.

At this time, since the projection 918T of the second case portion 912 can be guided by the slide guide portion 911K of the first case portion 911, the insertion portion 918 of the second case portion 912 enters the first case portion 911 in the V2 direction. Get in smoothly. For this reason, since the opening part 920 and the opening part 940 approach each other from the shifted position by compressing the first case part 911 and the second case part 912 in the direction approaching each other, as shown in FIG. The position of the arc portion 920A of 920 and the position of the arc portion 940C of the opening portion 940 substantially coincide with each other. For this reason, the drip tube 810 can be passed through the opening portion 920 and the opening portion 940.

As shown in FIGS. 10 and 11, when the drip tube 810 enters the opening portion 920 and the opening portion 940, the medical worker releases the two fingers FG, so that the spring 949 shown in FIG. Since the part 911 and the second case part 912 move relatively away from each other, the state in which the opening part 920 and the opening part 940 abut against the outer peripheral part of the drip tube 810 can be maintained. Thereby, the drip probe 900 is detachably attached to the drip tube 810.
When the drip probe 900 is thus attached to the drip tube 810, the first case portion 911 to the second case portion 912 of the drip probe 900 are connected to the drip port portion 810C of the drip tube 810 as shown in FIG. The drip probe 900 is mounted so that the drip tube 810 is vertical so that it is at an intermediate position between the liquid level LM and the liquid level LM.

10 and 11, the drip probe 900 is mounted in a correct mounting posture that is in the correct vertical direction with respect to the drip tube 810. That is, as shown in FIG. 11, the first sensor unit 951 is positioned on the upper side (upstream side) with respect to the drop direction (Z1 direction) of the drug droplet MS, and the second sensor unit 952 With respect to the MS falling direction (Z1 direction), it is located on the lower side (downstream side) than the first sensor unit 952.

The flow rate of the infusion pump 1 is set, and a predetermined amount of the infusion pump 1 (mL; total amount of medicine to be injected into the patient) is set. The clamp (clamp) 802 in FIG. 2 is opened. The indwelling needle 172, which is a venous needle, is inserted into the patient P. Then, the medicine feeding is started as follows.
In FIG. 11, the medicine 750 in the medicine bag 801 is dropped from the instillation port portion 810 </ b> C as a droplet MS, for example, at a drop interval of 10 drops / minute (in this case, for example, in the case of using a drop drop tube 810 of 20 drops / mL, When using a drip tube 810 with a drug set flow rate of 30 mL / h; 60 drops / mL, the set flow rate of the drug is 10 mL / h) and drops in the Z1 direction onto the liquid level LM of the drug 750 in the cylinder part 810A. .

Therefore, when the medical staff pushes the power switch 4F shown in FIG. 4 to switch on, the control unit 100 shown in FIG. 4 issues a command to the motor driver 134 to operate the drive motor 61. When the drive motor 61 is operated, the output shaft 161C of the drive motor 61 continuously rotates in the forward rotation direction. As a result, the cam structure 62 pushes each finger of the finger structure 63 so that each of the fingers is completely and sequentially closed along the outer circumferential surface of the infusion tube 200 along the T direction. Press (see FIG. 5; FIG. (A) → (B) → (C) → (D) → (A) (B) → (C) → (D)), and the drug in the infusion tube 200 Deliver the solution.

Returning to FIG. 11, the medicine 750 droplet MS in the medicine bag 801 falls from the instillation port portion 810C, and after the droplet MS crosses the first light L1 generated by the first light emitting portion 951A, The droplet MS crosses the second light L2 generated by the second light emitting unit 952A and reaches the liquid level LM of the medicine 750 in the cylinder 810A. As described above, when the liquid droplet MS falls, the first light L1 generated by the first light emitting unit 951A and the second light L2 generated by the second light emitting unit 952A pass, so that the first light receiving unit 951B can receive light. The amount of light L1 temporarily changes (decreases), and the amount of light L2 that can be received by the second light receiving unit 952B temporarily changes (decreases).

Accordingly, the control unit 100 illustrated in FIG. 11 receives the first light amount change detection signal PS1 generated by the first light receiving unit 951B and the second light amount change detection signal PS2 generated by the second light receiving unit 952B, thereby 100 obtains the change in the light amount of the first light L1 from the first light receiving unit 951B and the change in the light amount of the second light L2 from the second light receiving unit 952B in this order.
As described above, when the droplet MS is properly dropped from the drip mouth portion 810C, the drop detection display lamp 913 shown in FIG. Notify workers with light. Thereby, the medical staff can recognize visually that the droplet MS has fallen appropriately.

If the liquid droplet MS does not fall from the drip port portion 810C, it is an empty liquid (run-out), so the control unit 100 detects the first light quantity change detection signal PS1 generated by the first light receiving unit 951B, The second light quantity change detection signal PS2 generated by the two light receiving portions 952B cannot be obtained. At this time, the control unit 100 is in an air liquid (out of liquid) state, and it is assumed that the flow rate is abnormal. The control unit 100 warns that the flow rate is abnormal by sound with the buzzer 132 shown in FIG. 4, assuming that the flow rate is abnormal and the flow rate is abnormal as necessary. Further, the display unit 3 shown in FIG. 4 displays an alarm indicating “flow rate abnormality”. The issuing of these alarms can be arbitrarily selected.

Further, when the medicine flows from the instillation port portion 810C in a free flow (continuous flow), the control unit 100 generates a first light amount change detection signal PS1 indicating a change in the amount of light generated by the first light receiving unit 951B. Since the second light amount change detection signal PS2 indicating the change in the amount of light generated by the second light receiving unit 952B cannot be obtained, the control unit 100 determines that the flow rate is abnormal, through the speaker 131 shown in FIG. "Sound a warning to the effect." In addition, the control unit 100 warns that the flow rate is abnormal with a buzzer 132 shown in FIG. Further, an alarm indicating that the state is “free flow state” is displayed on the display unit 3 shown in FIG. 4.

10 and FIG. 11, the drip probe 900 is attached to the drip tube 810 in the correct orientation (posture). In this case, as shown in FIG. 11, when the droplet MS falls from the drip port portion 810C, the first light amount change detection signal PS1 indicating the change in the light amount and the second light amount change detection signal PS2 indicating the change in the light amount. Are obtained in this order. As described above, if the first light quantity change detection signals PS1 and PS2 indicating the change in the quantity of light caused by the drop of the droplet MS are obtained in this order, the control unit 100 determines that the drip probe 900 is correct with respect to the drip cylinder 810. Judged to be worn in the orientation (posture). In this case, for example, on the display unit 3 shown in FIG. 4, a display or sound indicating that “the drip probe 900 is mounted in the correct orientation (posture) with respect to the drip tube 810” according to a command from the control unit 100. Can be notified.

In the example shown in FIG. 12, when the drip probe 900 is attached to the drip tube 810 in the correct orientation (posture), the dropped droplet MS bounces off the liquid level LM. In this case, the rebounding droplet NV formed by rebounding rises in the Z2 direction to generate the second light L2 generated by the second light emitting unit 952A and the first light L1 generated by the first light emitting unit 951A. pass. Then, the rebounding droplet NV from the liquid level LM falls again, and this droplet NV again causes the first light L1 generated by the first light emitting unit 951A and the second light generated by the second light emitting unit 952A. There is a risk of passing through the light L2. As shown in FIG. 12, the control unit 100 originally detects the correct first light amount change detection signal PS1 and second light amount change detection signal PS2 obtained by dropping the droplet MS in the Z1 direction, and the unnecessary light amount indicated by a broken line. Change detection signals RS2T, RS1T, RS3T, and RS4T are obtained.
However, the control unit 100 counts the correct first light quantity change detection signal PS1 and second light quantity change detection signal PS2 and counts one droplet MS, but other unnecessary light quantity change detection signals RS2T and RS1T. , RS3T, RS4T are ignored. As a result, even if the dropped droplet MS bounces off the liquid level LM and the bounced droplet NV passes through the first light L1 and the second light L2, the control unit 100 incorrectly sets the number of droplets. Since counting is not performed, it is possible to prevent erroneous detection of the number of drug droplets in the drip probe 900.

In the example shown in FIG. 13, the drip probe 900 is not mounted in the correct orientation (posture) with respect to the drip tube 810, and the drip probe 900 is mistakenly turned upside down. 810 has been installed. That is, the vertical relationship is opposite to the case of FIG. 11, the second sensor unit 952 is positioned on the upper side, and the first sensor unit 951 is positioned on the lower side.
In this case, the droplet MS passes through the drip port 810C in the order of the second light L2 generated by the second light emitting unit 952A and the first light L1 generated by the first light emitting unit 952A. For this reason, the control unit 100 receives the first light quantity change detection signal PS1 after receiving the second light quantity change detection signal PS2. The control unit 100 continues to receive the second light amount change detection signal PS2 and the first light amount change detection signal PS1 in the order of two or more times (at one time, from the liquid level LM of the droplet MS when normally mounted). Therefore, it is determined that the drip probe 900 is mounted upside down.
A three-axis acceleration sensor (not shown) may be provided to detect the mounting state of the drip probe 900 on the drip tube 800. In addition, when the LED is provided and the infusion probe 900 is normally attached, it is displayed in green (blue) until the liquid feeding operation is started, and the infusion probe 900 is attached upside down. In such a case, it may be controlled to display in red (orange) until the liquid feeding operation is started.

As a result, the control unit 100 shown in FIG. 4 issues a warning to the effect that “the drip probe is reversely attached” through the speaker 131 shown in FIG. Moreover, the control unit 100 warns with a sound by the buzzer 132 shown in FIG. 4 as necessary. Further, the display unit 3 shown in FIG. 4 displays an alarm indicating that “the drip probe is reversely mounted”. Thereby, the medical staff can confirm the reverse mounting state of the drip probe 900 and can immediately mount it again.
As shown in FIG. 13, even when the drip probe 900 is mounted upside down, the second light amount change from the receiving unit 952B of the second sensor unit 952 is performed in the control unit 100 as necessary. If the detection signal PS2 and the first light quantity change detection signal PS1 from the receiving unit 951B of the first sensor unit 951 are reversed in time, the number of drops of the medicine can be obtained accurately and injection with high accuracy Can do.

(Second Embodiment)
FIG. 14 shows a second embodiment of the present invention.
In the first embodiment of the present invention shown in FIGS. 6 to 11, the drip probe 900 uses a cord 903 that sends a light amount change detection signal and a connection plug 902 to send it to the infusion pump 1 in a wired manner. Yes.
However, in the example shown in FIG. 14, the drip probe 900 transmits the first light quantity change detection signals PS1 and PS2 to the control unit 100 of the infusion pump 1 by wireless communication without using a code. Therefore, the drip probe 900 includes a first sensor unit 951, a second sensor unit 952, a control unit 990, a drip detection display lamp 913, a battery 991, and a communication unit 992.

The control unit 990 receives the first light amount change detection signal PS1 from the first sensor unit 951 and the second light amount change detection signal PS2 from the second sensor unit 952. The battery 991 is a battery that supplies power to the control unit 990. The communication unit 992 wirelessly sends the first light amount change detection signal PS1 and the second light amount change detection signal PS2 to the communication unit 993 on the infusion pump 1 side. Then, the communication unit 993 supplies the first light amount change detection signal PS1 and the second light amount change detection signal PS2 to the control unit 100.
As described above, in the infusion probe 900, a battery is mounted and a detection signal can be wirelessly sent to the infusion pump side, and the setting of the code can be omitted, so that the infusion probe can be miniaturized.
In this case, when the control unit 100 of the infusion pump 1 cannot receive wirelessly, or when the remaining amount of the battery of the infusion probe 900 is small, an alarm display, a voice guide, and a buzzer are generated by the control of the control unit 100. For example, an alarm may be notified.
Further, a three-axis acceleration sensor (not shown) may be provided to detect the mounting state of the drip probe 900 on the drip tube 800. In addition, when the LED is provided and the infusion probe 900 is normally attached, it is displayed in green (blue) until the liquid feeding operation is started, and the infusion probe 900 is attached upside down. In such a case, it may be controlled to display in red (orange) until the liquid feeding operation is started.

An infusion probe 900 according to an embodiment of the present invention is used in an infusion pump that delivers a medicine in a medicine container to a patient through an infusion cylinder and an infusion tube. The infusion probe 900 is attached to the infusion cylinder to drop the medicine in the infusion cylinder. It is an infusion probe to detect. The drip probe 900 is disposed upstream of the main body portion and the main body portion with respect to the dropping direction of the drug in the drip tube, and the first sensor unit that detects the dropping of the drug, With respect to the dropping direction of the medicine, a second sensor part is provided which is disposed downstream of the first sensor part and detects dropping of the medicine.

Thereby, when the drip probe is mounted on the drip tube in a normal posture, the second sensor unit can detect the dropping of the drug after the first sensor unit detects the dropping of the drug. There is a time difference between the second sensor units detecting the dropping of the medicine. For this reason, if the infusion probe is mounted incorrectly upside down, after the second sensor unit detects the dropping of the drug, the first sensor unit detects the dropping of the drug. For this reason, it can be detected that it is mounted upside down with respect to the drip tube.
In addition, when the drip probe is attached to the drip tube in a normal posture, the phenomenon in which the drug dropped in the drip tube rebounds on the liquid level of the drug accumulated in the drip tube occurs. After the sensor unit detects the drug that has bounced back, the first sensor unit detects the drug that has bounced back. For this reason, even if there is a drug that has bounced in this way, the number of drops as a correct drug drop is grasped only when the second sensor part detects the drop of the drug after the first sensor part detects the drop of the drug. can do.

The first sensor unit includes a first light emitting unit that generates first light, and a first light receiving unit that receives the first light passing through the drip tube, and the second sensor unit generates second light. And a second light receiving unit that receives the second light that has passed through the drip tube. For this reason, it is only necessary to use the 1st sensor part and 2nd sensor part which are optical sensors, and the enlargement of an infusion probe can be avoided.
When the dropping of the medicine is detected, the detection signal output from the first light receiving section and the detection signal output from the second light receiving section when the dropping of the medicine is detected are sent to the infusion pump by wire. For this reason, a detection signal can be sent by wire from the infusion probe to the infusion pump.
When detecting the dropping of the medicine, the detection signal output from the first light receiving unit and the detection signal output from the second light receiving unit when detecting the dropping of the medicine are wirelessly sent to the infusion pump side. For this reason, a detection signal can be sent wirelessly from the drip probe to the infusion pump.

The main body part moves relative to the first case part and the second case part that detachably fixes the main body part to the infusion cylinder by sandwiching the infusion cylinder with the first case part. And a display lamp that is disposed on the main body portion and displays that the dropping of the medicine has been detected. For this reason, the display lamp can notify the medical staff that the dropping of the medicine has been detected while the main body of the infusion probe is detachably attached to the infusion tube.
Since the infusion pump of the present invention has an infusion probe, when the infusion probe is used for the infusion pump, it can detect that the main body of the infusion probe is mounted upside down with respect to the infusion tube. It is possible to detect a phenomenon in which the applied medicine rebounds at the liquid level of the medicine accumulated in the infusion tube and grasps the correct number of drops of the medicine.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims.
In the embodiment of the infusion pump of the present invention, as shown in FIG. 5, the liquid feeding drive unit 60 is a full feeding liquid 750 in the infusion tube 200 by pressing the infusion tube 200 without completely crushing it. The press method is illustrated. However, the present invention is not limited to this, and the liquid feeding drive unit 60 may employ a mid press system that feeds the drug 750 in the infusion tube 200 by completely crushing the infusion tube 200.
A part of each configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.

DESCRIPTION OF SYMBOLS 1 ... Infusion pump, 3 ... Display part, 100 ... Control part, 200 ... Infusion tube, 801 ... Drug bag (medicine accommodating part), 810 ... Infusion tube, 900 ...・ Infusion probe, 901... Body part of infusion probe, 911... First case part, 912... Second case part, 913 .. drop detection display lamp (display lamp), 920, 940. Opening portion, 949... Spring (biasing member), 949... Spring, 951... First sensor portion, 951A... First light emitting portion, 951B. .... Second sensor part, 952A ... second light emitting part, 952B ... second light receiving part, LM ... liquid level of medicine, MS ... liquid drop of medicine, L1 ... first light , L2 ... second light, PS1 ... first light quantity change detection signal, PS2 · Second light quantity change detection signal

Claims (6)

1. A drip probe that is used in an infusion pump that delivers a medicine in a medicine container to a patient through an infusion tube and an infusion tube, and that is attached to the infusion tube and detects the dropping of the medicine in the infusion tube,
   The main body,
   In the main body, with respect to the dropping direction of the drug in the drip tube, a first sensor unit that is disposed upstream and detects the dropping of the drug;
   A second sensor unit that is disposed downstream of the first sensor unit and detects the dropping of the drug in the main body unit with respect to the dropping direction of the drug in the infusion tube,
   An infusion probe comprising:
2. The first sensor unit includes a first light emitting unit that generates first light and a first light receiving unit that receives the first light that has passed through the drip tube, and the second sensor unit includes a second light receiving unit. The drip probe according to claim 1, further comprising: a second light emitting unit that generates light; and a second light receiving unit that receives the second light that has passed through the drip tube.
3. A first detection signal output from the first light receiving unit when the dropping of the drug is detected and a second detection signal output from the second light receiving unit when the dropping of the drug is detected are sent to the infusion pump. The drip probe according to claim 2, wherein the drip probe is configured to be sent by wire.
4. When the dropping of the medicine is detected, the first detection signal output from the first light receiving unit and the second detection signal output from the second light receiving unit when the dropping of the medicine is detected are wirelessly transmitted to the infusion pump side. The drip probe according to claim 2, wherein the drip probe is configured to be sent by a step.
5. The main body part moves relative to the first case part and the first case part and sandwiches the infusion tube together with the first case part, so that the main body part can be attached to and detached from the infusion tube. The drip probe according to claim 1, further comprising: a second case part to be fixed; and a display lamp arranged on the main body part to display that the dropping of the medicine is detected.
6. An infusion pump comprising the infusion probe according to any one of claims 1 to 5.

Images