JP2007222485A - Transfusion safety apparatus and transfusion pump using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfusion safety apparatus of a relatively easy configuration capable of taking countermeasures for a free flow in a conventional wide transfusion pump, and a transfusion pump system with the transfusion safety apparatus. <P>SOLUTION: A clamp body 10 having a cam mechanism 120, a servomotor 123M, and a control part 124 or the like is provided on a position away from a transfusion pump 2. A push switch SW to switch on/off the cam mechanism 120 is provided on the transfusion pump 2 extended from the clamp body 10 and covered with a pump door 210. Opening the pump door 210 releases the push switch SW to activate the cam mechanism 120, so that a transfusion tube 3 could be pressed from its side to be obstructed, which prevents free flow. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an infusion safety device attached to an infusion pump, and more particularly to a technique for measures against free flow when a door of an infusion pump is opened.

In the medical field, an infusion system in which an infusion tube is attached to an infusion pump is used for the purpose of delivering a drug solution, a nutrient, blood, or the like to a patient or a solution feeding line at a predetermined speed and timing.
As the infusion pump, as disclosed in Patent Documents 1 and 2, a peristaltic pump is widely used. The peristaltic pump is mainly of a finger type having a plurality of fingers (protrusions) or a roller type having a plurality of cylindrical rollers. When the pump is used, the infusion tube is disposed so as to contact the finger or the roller. Then, when driving, the finger movement or roller is rotated, and the side surface of the infusion tube is pressed and crushed so as to deform. As a result, a peristaltic motion is performed, and the chemical solution in the tube is circulated in a certain direction. In the medical field, adjust the flow rate of the drug solution in the infusion tube by appropriately setting the peristaltic movement of the finger of the infusion pump or the rotation speed and driving time of the roller, the number of infusion tubes, the diameter of the infusion tube, etc. The drug solution is administered to the patient and the liquid delivery line.

By the way, with an infusion pump, if the infusion tube comes off from the infusion pump side due to an unexpected reason and the driving force of the infusion pump does not work on the infusion tube, the infusion outflow due to free fall (natural fall) due to gravity, the so-called free flow problem occurs. There is a danger to do.
As countermeasures against this problem, Patent Documents 1 and 2 include a safety mechanism for preventing the occurrence of free flow as a mechanism of an infusion pump. Specifically, a safety clamp is disposed in the vicinity of the infusion tube and a portion of the infusion tube is protected by a pump door. When the door is opened during driving due to an operation error or the like, the safety clamp is automatically operated to close the infusion tube, and the infusion is stopped.
JP 2004-57577 A JP 2000-300667 A Japanese Unexamined Patent Publication No. 6-14201 JP-A-5-277186 JP 2004-73822 A

However, the conventional infusion safety device has the following problems.
The infusion safety mechanism of Patent Documents 1 and 2 is provided almost integrally with an infusion pump. Therefore, in order to obtain the effect, it is necessary to purchase an infusion pump having the mechanism in order to obtain the effect. In the infusion pump already used in the medical field or the infusion pump having no safety mechanism, the effect is obtained. Cannot be obtained.

In view of the above, it can be said that there is still room for solution for infusion safety devices.
The present invention has been made in view of the above problems, and an infusion safety device capable of taking measures against free flow in a wide range of infusion pumps with a relatively simple configuration, and an infusion solution with an infusion safety device using the same The object is to provide a pump.

  In order to solve the above-mentioned problems, the present invention is an infusion safety device, which has a portable structure independent of an infusion pump casing so that a predetermined portion of an infusion tube from an infusion source to an infusion destination can be clamped. A main body, a first detection switch attached to the clamp main body and detachably provided on the infusion pump for detecting the opening / closing of a door covering the infusion tube mounting position of the infusion pump, and a detection signal of the first detection switch Based on the above, the first mode for clamping the infusion tube when the open state of the door is detected and the second mode for releasing the clamping operation when the closed state of the door are detected are switched. And a control means.

Here, at least one of a push switch, an optical switch, a piezoelectric switch, and a slide switch can be used as the first detection switch.
Further, the clamp mechanism in the clamp body is a cam mechanism that presses a side surface of the infusion tube to adjust a flow state of the infusion in the infusion tube, and the control means is the pressing force in the first mode. In the second mode, the pressing force is relaxed to release the infusion state.

Further, the clamp mechanism in the clamp body is an electromagnetic valve interposed in the infusion tube, and in the first mode, the control means moves the electromagnetic valve to a closed state to reduce the infusion volume, In the two modes, the infusion amount can be released by shifting the solenoid valve to the open state.
In addition, a second detection switch is provided in an infusion tube disposition area covered by the door of the infusion pump housing, and detects the dropout of the infusion tube in the area, and the control means includes the second detection switch. Based on the detection signal, when the drop of the infusion tube is detected in the closed state of the door in the second mode, the mode is switched to the third mode for clamping the infusion tube, and the door is opened after switching to the third mode. The third mode is maintained until the door is closed again, and the second mode is switched after the door is closed.

Here, the second detection switch may be an optical switch.
In the present invention, the clamp body may be configured integrally with an infusion probe.
Alternatively, the infusion safety device may be configured integrally with the clamp.
Furthermore, the present invention provides an infusion pump system with an automatic safety device in which any of the infusion safety devices of the present invention is combined with an infusion pump body.

  According to the infusion safety device of the present invention having the above configuration, the first detection switch is fixed to the infusion pump during use, and clamped at a position from the infusion pump to the infusion supply destination (for example, an upstream position of the infusion tube). The body can be installed. When the infusion tube is attached to the infusion pump in this state and the infusion pump is operated, the mode is switched by the first detection switch when the door of the infusion pump is unexpectedly opened. As a result, the clamp mechanism operates and the flow state of the infusion solution in the infusion tube is limited, so that the free flow of the infusion tube is effectively suppressed. Moreover, since the said mode is hold | maintained until switching of a 1st detection switch is performed by the control part, it can prevent a free flow continuously until a pump door is closed again by a user. For this reason, a high safety mechanism will be exhibited.

  As described above, the present invention is a system in which the clamp is detachably disposed on the infusion tube, and the switch for switching the clamp mechanism can be disposed at a position separated from the clamp body. It can be installed later on an existing infusion pump. For this reason, it is not necessary to purchase a new infusion pump in order to prevent free flow, and there is a great cost advantage.

Moreover, since it is the structure which provides a clamp main body independently from the infusion pump housing | casing in this invention, even when there is no empty space on an infusion pump, a clamp mechanism can be provided.
As a specific method for attaching to the infusion pump, simply attach the switch relating to the infusion safety device of the present invention to a predetermined position of the infusion pump detachably by using various fixing tools such as adhesive tape, adhesive, and screws. The free flow prevention effect by the clamp body can be obtained. For this reason, it has the feature that it is very versatile, for example, the mounting location of the switch can be changed as appropriate according to the shape of the infusion pump.

<Embodiment 1>
(Configuration of infusion pump system 1)
FIG. 1 is a configuration diagram of an infusion pump system 1 with an infusion safety device according to Embodiment 1.
The infusion pump set with an infusion safety device according to the first embodiment is in the order of an infusion bottle 11, which is an infusion source from the upstream side of the infusion tube 3, a clamp body 10, an infusion tube 12, a clamp 13, and an infusion pump 2. It is arranged.

The infusion tube 3 is made of a flexible resin material. In the system, the infusion tube 3 plays a central role of transfusing the medicinal solution from the infusion bottle 11 to the patient through the internal channel 30.
The clamp body 10 is directly disposed on the infusion tube 3, and constitutes the clamp set 5 (infusion safety device) which is a feature of the present invention together with the push switch SW disposed on the infusion pump 2. Details will be described later.

The drip tube 12 is a transparent tubular body, and is arranged for the purpose of confirming the flow rate of the drug solution flowing inside the infusion tube 3.
The clamp 13 is arranged as a means for a nurse or the like to manually adjust the flow rate of the drug solution 40.
The infusion pump 2 is a known peristaltic type, and a peristaltic type roller is built in a box-shaped housing 220. Further, a display unit 222, an operation unit 227, a pump interior 221, an infusion set unit 223, a pump door 210, a door lever 211, and the like are provided on the front surface of the housing 220. The housing 220 is provided with a control circuit (not shown) for receiving user information input from the operation unit 227 and driving the roller as set.

The display unit 222 displays the infusion flow rate, the infusion volume, the number of infusions, various pump states (the presence or absence of bubbles / infusion, the door open / close state, the internal battery state, the occlusion sensor state, etc.) by digital display method during driving. .
The operation unit 227 is provided with main buttons such as a power button, a drive start / stop button, and a setting input button, as well as adjustment buttons such as a memory clear button and a setting switching button. The input infusion conditions are transmitted to a control circuit arranged in the housing 220 and stored in a memory unit of a microcomputer in the circuit.

The pump door 210 is provided so as to be openable and closable with a hinge with respect to the housing 220, and covers the entire pump interior 221 of the pump housing 220 in which the infusion tube 3 is set.
In the pump interior 221, a push switch SW related to the clamp set 5 is detachably disposed by a sticking means such as a double-sided tape in a region where the pump door 210 abuts.
Below the position where the push switch SW is disposed, there is an infusion set part 223 built in the housing 220. In the infusion set portion 223, a plurality of disc-shaped projection finger portions 224 to which the driving force of the peristaltic roller is transmitted are provided so as to be eccentric to the drive shaft, and are exposed to the outside. . At the time of driving, the eccentrically arranged fingers sequentially press the infusion tube 3 and perform a peristaltic motion so as to perform a pumping action.

A clip-shaped occlusion sensor 225 is provided at the center of the finger portion 224 so that the infusion tube 3 can be gripped.
A door safety clamp 226 is disposed on the downstream side of the infusion setting unit 223. This is a configuration in which when the pump door 210 is opened for some reason when the pump is driven, the infusion tube 3 is gripped so as not to drop off from the infusion set portion 223.

In addition, the pump housing 220 is provided with grooves 230 and 231 for guiding the infusion tube 3.
(Configuration of clamp set 5)
FIG. 2 is a diagram showing the configuration of the clamp set 5. As shown in FIG.
As shown in the figure, the clamp set 5 includes a clamp body 10, a wiring 130, and a push switch SW.

The clamp body 10 has a portable structure that is independent of the infusion pump 2 housing, and includes a clamp housing 100, a cam mechanism 120, a groove 101, a cam groove 102, and the like.
The clamp casing 100 is formed by, for example, injection molding a resin material into a rectangular parallelepiped shape, and the inside is formed hollow. As shown in FIG. 2, a groove 101 communicating with the outside is disposed at the center of the casing so that the infusion tube 3 can be fitted therein. The width of the groove 101 is set slightly smaller than the diameter of the tube so that the infusion tube 3 can be satisfactorily fitted and held (see FIG. 3 (c)). A cam groove 102 in which the tip of the cam body 121 can be stored is disposed in a region facing the cam body 121 across the groove 101.

  As an example of a clamping mechanism for the infusion tube 3, a cam mechanism 120 is built in the built-in portion 103 that faces the cam groove 102 with the groove 101 interposed therebetween. The cam mechanism 120 has an elliptical cam body 121 as a center, and includes a cam shaft 122, a servo motor 123M, a control unit 124 for the servo motor 123M, and a battery 126. Among these, the cam body 121 is fixed to a cam shaft 122 that is a rotation shaft of the servo motor 123M, and both ends of the cam shaft 122 are rotatably held above and below the housing 100.

  The servo motor 123M is a digital servo as an example, and has a performance of a speed of 0.18 sec / 60 ° and a torque of 1.9 kg · cm. A size example is 13mm x 29mm x 28mm. As a result, the elliptical cam body 121 receives the driving force of the servo motor 123M and can operate from the initial position (FIG. 3 (a)) to a predetermined angle θ (for example, an angle of about 60 °) around the cam shaft 122 (see FIG. 3 (b)). As an example, the size of the clamp body 10 can be 21 mm in the x direction, 32 mm in the y direction, and 16 mm in the z direction.

  A torque of about 1 kg or more is preferable because it can be sufficiently closed even when the infusion tube 3 is pressed from the side. A controller 124 and a battery 126 are connected to the servo motor 123M via a printed wiring 125. The control unit 124 is provided with a wiring 130 extending from the clamp body 10, and a push switch SW as a first detection switch is provided at the downstream end of the wiring 130.

  The push switch SW has a configuration in which a button portion 150 is stacked on a base portion 151. The push switch SW is configured to be turned on when the pressing force reaches the button unit 150, but automatically returns to the off state when the pressing force does not reach. A double-sided adhesive member is disposed on the back surface of the base portion 151 as a disposing means for the infusion pump 2, and can be attached to a predetermined position of the infusion pump 2. The push switch SW switches between a first mode and a second mode of the clamp set 5 described later.

In addition to the above, hooks, hook-and-loop fasteners, screws and the like can be used as means for disposing the base portion 151. If the casing 100 of the clamp body 10 is made of a magnetic material, it can be fixed by the magnetic force. In addition, when using the said magnetic body, it cannot be overemphasized that the mounting place of an infusion pump needs to be comprised with a metal etc.
Here, the control unit 124 includes a one-chip microcomputer, and has a ROM (not shown) in which a predetermined control program is stored. The control unit 124 receives power supply from the battery 126 based on the contents of the control program, and rotates the servo motor 123M based on the switching signal from the push switch SW. The control unit 124 controls the rotation amount of the cam shaft 122 (maximum 120 ° or less, for example, 60 ° can be set) and the speed. Further, once the push switch SW switching signal is received, the mode holding function is also operated so as to hold the mode until the next signal is received.

The servo motor 123M is an example of a drive source of the cam mechanism 120, and the present invention is naturally not limited to the drive source, and a commercially available pulse motor may be used, or a rotary solenoid may be used. Also good.
Further, instead of using the battery 126, for example, an external DC power source may be used using an AC adapter.

Further, the control unit 124 may not be built in the clamp body 10, and may be disposed on the infusion pump 2 side together with the switch SW, for example.
Furthermore, the first detection switch used in the present invention is not limited to the push type, and may be a known switch such as a contact switch in addition to the optical switch, the piezoelectric switch, and the slide switch. Further, not only when the wiring 130 is used, a wireless switch may be used.
(Effect of infusion pump and clamp set)
FIGS. 3A and 3B are diagrams showing a state when the clamp body is attached to the infusion tube 3 and an operation state of the clamp body. FIGS. 3 (a) and 3 (b) are top views of the clamp body (the infusion tube is shown in cross section), and FIG. 3 (c) is a front view of the clamp body.

  According to the clamp set 5 having the above configuration, a user (nurse, etc.) can first attach an area corresponding to the opening / closing portion of the pump door 210 (for example, the position shown in FIG. 1B) in the infusion pump 2 before use. And a portion where the edge of the pump door 210 abuts is considered suitable). The push switch SW may be disposed only when it is first attached to the infusion pump 2. In addition, when the clamp set 5 is not applied to other infusion pumps, the push switch SW may be fixed to the infusion pump 2.

Then, as shown in FIG. 3C, the infusion tube 3 is lightly pushed into the groove 101 of the clamp body 10 and attached. At this time, the cam main body 121 is basically in an open state with respect to the groove portion 101, but it is desirable to operate so as to open with a finger for confirmation.
Next, the infusion tube 3 is attached to the infusion pump 2. As an example of the mounting order, as shown in FIGS. 1A and 1C, the groove part 230, the infusion set part 223, the door safety clamp 226, and the groove part 231 are attached in this order.

  After the installation of the push switch SW and the infusion tube 3, the user tightens the pump door 210 and locks it in the closed state by the door lever 211. At this time, the push switch SW is turned on by receiving a pressing force at the edge of the pump door 210, the cam mechanism 120 is held at the initial position (the groove 101 is opened), and the infusion state of the infusion tube 3 is released. The state (first mode) is entered. In this state, the user drives the infusion pump 2 (the state shown in FIG. 4). Here, FIG. 3A shows a state of the clamp set 5 immediately after the door lock. An infusion tube 3 is fitted to the clamp body 10, and a chemical solution can flow through the flow passage 30 inside the tube 3.

  In the unlikely event that the pump door is unexpectedly opened due to a nurse's operation error, the push switch SW is restored from the pressed state and turned off. Upon receiving the switch switching signal, the control unit 124 immediately activates the servo motor 123M, and the cam body 121 is centered on the cam shaft 122 at a speed and an operating angle (60 ° in this case) preset by the control program. Is operated, and the infusion tube 3 is pressed and crushed from the side (FIG. 3 (b)). Thereby, the infusion tube 3 is blocked by the cam mechanism 120, and the second mode is formed.

Note that once the second mode is formed, the control unit 124 holds the second mode until the pump door 210 is closed again.
During the operation of the cam mechanism 120, the tip of the cam body 121 is housed in the cam groove 102. Therefore, the casing 100 itself of the clamp body 10 does not become a barrier of the cam mechanism 120. The inside of the tube 3 is blocked.

At this time, in consideration of the torque of the servo motor 123M, it is preferable to set the angle slightly larger than the actual operating angle because the infusion tube 3 can be closed well.
As described above, the clamp set 5 according to the first embodiment is a configuration added to the existing infusion pump system, but the infusion tube 3 is closed simultaneously with the unexpected release of the pump door 210 to prevent the free flow of the medicinal solution. it can. The clamp set 5, for example, can be attached to a fairly expensive intensive care unit console etc., for example, because an infusion pump that has already been installed in the facility, so the measures for free flow are taken while minimizing new costs. The merit is great in that it can.

(Variations during clamp operation)
In the first embodiment described above, the cam mechanism 120 of the clamp body 10 is activated when the pump door 210 is released, and the structure that prevents the free flow of the infusion tube 3 is disclosed, but in actuality, the pump door 210 is closed. It is also assumed that the infusion tube 3 falls off from a predetermined mounting position of the infusion pump 2 inside the pump door 210, and in this case, a free flow may occur.

Therefore, in the present invention, an optical switch PSW is connected as a second detection switch as shown in FIG. 1 separately from the push switch SW to the control unit 124, and a new control program is introduced into the ROM of the control unit 124. Thus, the cam mechanism 120 may be operated by the detection signal of the optical switch PSW (the wiring of the switch PSW is omitted in FIG. 1).
As the optical switch PSW, a known infrared switch used for position detection means of a cordless mouse can be used. For example, the mounting position of the infusion tube 3 on the upper part of the infusion set part 223 (the position of “C” in FIG. 1) Can be provided.

  According to the variation having the above configuration, the tube 3 is usually arranged in the vicinity of the light receiving part of the switch due to the arrangement of the infusion tube 3, but the infusion tube 3 is located at the position C in the pump door 210 for some reason. When the light receiving unit is unshielded by dropping from the control unit, the control unit 124 receives a detection signal based on the release of the shielding. In this case, as a third mode, the control unit 124 operates the servo motor 123M and closes the infusion tube 3 by the cam mechanism 120 based on the new control program. This clamping operation is held until the user notices a change, opens the pump door 210, sets the infusion tube 3 correctly, and closes the pump door 210 again.

According to the above operation, the introduction of the third mode prevents the free flow even when the infusion tube 3 is dropped with respect to the infusion pump 2 while the pump door 210 is closed in addition to the release of the pump door 210. Therefore, higher safety measures can be taken compared to the first embodiment.
<Embodiment 2>
The clamp set 5 of the first embodiment is configured to directly fit the clamp body 10 to the infusion tube 3, but the clamp body 10 can be incorporated in a device separate from the infusion pump 2.

The clamp set of the second embodiment is an infusion probe integrated clamp set 4 as shown in FIG. 4, and is characterized in that a known infusion probe also has a cam mechanism 120 of the clamp body 10.
The infusion probe 4 detects the number of infusions of the infusion tube 12 fitted to the set unit 401 of the housing 400 with an optical sensor under the setting conditions input by the user from the input unit 411, and the infusion on the liquid crystal display unit 410 Displays the number and flow rate. In the clamp set 4, a cam mechanism 402 similar to the above 120 is disposed on the downstream side of the set portion 401.

Even with such a configuration, the same free flow prevention effect as in the first embodiment can be obtained, and the labor for attaching the clamp body 10 to the infusion tube 3 can be saved, so that there is a merit of excellent convenience.
<Embodiment 3>
FIG. 6 is a diagram illustrating a configuration of a clamp body 10X in the clamp set according to the third embodiment.

  The clamp main body 10X shown in the figure has a configuration of being held by a probe attachment member 16X that is fitted to the drip tube 12 via a shaft 15X. Since the drip tube 12 is more resistant to deformation than the infusion tube 3 due to the characteristics of the configuration, the probe mounting member 16X is fixed to the infusion tube 12 so that the drip tube 12 is fitted to the infusion tube 3 only by the groove 101. There is an advantage that the clamp body 10X can be positioned more reliably and can be positioned more securely.

<Embodiment 4>
In the first embodiment, the cam mechanism 120 is used as the clamp mechanism. However, the present invention is not limited to this, and another clamp mechanism may be used.
As shown in FIG. 7, the clamp set of the fourth embodiment includes a clamp body 10Y using a known solenoid type electromagnetic valve mechanism instead of the cam mechanism as another example of the clamp mechanism of the infusion tube 3. is there.

The clamp body 10Y is a so-called single solenoid type electromagnetic valve, and includes an electromagnetic valve mechanism 100Y, a control unit 110Y, wirings 108Y and 130, and a push switch SW.
The control unit 110Y includes a control unit (not shown) and a battery, and supplies power from the battery to the electromagnetic valve mechanism 100Y at a predetermined timing.
The electromagnetic valve mechanism 100Y includes an electromagnetic coil 103Y, 104Y, a solenoid plunger 106Y that is an electromagnetic valve inserted into the electromagnetic coil 103Y, 104Y, a sliding column 105Y, and a flow passage 107Y in a rectangular parallelepiped housing. Etc. The solenoid plunger 106Y receives the magnetic field generated by the electromagnetic coils 103Y and 104Y and can move reciprocally along the sliding column 105Y.

  The clamp body 10Y is inserted between the two infusion tubes 3a and 3b through the ports 101Y and 102Y, and usually the medicinal solution is infused from 3a to 3b through the flow passage 107Y. When the control unit 110Y detects the detection signal from the push switch SW through the wiring 130, the control unit 110Y supplies the electric power of the lithium ion battery to the electromagnetic coils 103Y and 104Y. As a result, the solenoid plunger 106Y protrudes into the flow passage 107Y, and the flow passage 107Y is closed by the solenoid plunger 106Y. With the above operation, the flow of the chemical solution in the flow passage 107Y is stopped, and a free flow preventing effect is instantaneously achieved.

Even with such an electromagnetic valve mechanism, the same effects as in the first embodiment can be obtained, and since the infusion tube 3 is not a system that directly deforms and closes it, the infusion tube 3 is prevented from being damaged and good for a long time. It becomes possible to take measures to prevent free flow.
<Embodiment 5>
FIG. 8 is a diagram showing a configuration of a clamp 13X according to the infusion safety device (clamp combination type) of the fifth embodiment. FIG. 8 (a) is a side view, and FIG. 8 (b) is a front view. FIG. 8C is a perspective view of the cam body.

The fifth embodiment is characterized in that the infusion safety device is also used as a clamp, and has a configuration of a clamp 13X incorporating a clamp mechanism using a worm gear mechanism, and an infusion tube 3 in the vertical direction. The main body 131X, the cam body 132X, and the control unit 133X having the communication path are provided.
The clamp body 131X has a cam body 132X having a cochlear cross-sectional shape as shown in FIG. 8 (c). As shown in FIG. 8 (a), the camshaft 131X is located at the upper part (upstream side) of the clamp body 131X. It is pivotally supported by 1321X. A pinion gear PG1 is disposed at one end of the cam shaft 1321X as shown in FIG. 8 (b). The cam shaft 1321X is disposed with the direction perpendicular to the longitudinal direction of the infusion tube 3 as the axial direction.

  On the other hand, as shown in FIG. 8 (b), a servo motor unit 133X including a servo motor 1330M, a battery 1332X, and a control unit 1331X that operates according to a predetermined control program is disposed on one end of the cam body 132X. Has been. The tip of the motor shaft of the servo motor 1330M is a worm gear WG1, and is arranged to mesh with the pinion gear PG1. Thus, when the control unit 1331X rotates the servo motor 1330M using the battery 1332X as a drive source based on a predetermined control program, a worm gear mechanism is formed in which the cam body 132X rotates about the cam shaft 1321X. The control unit 1331 is provided with a push switch SW through the wiring 130 as in the first embodiment, and is attached to the infusion pump 2 side.

  In the clamp 13X having the above-described configuration, the control unit 1331X normally stops the servo motor 1330M at a predetermined rotation angle shown in FIG. 8 (a), and maintains the angle so that the infusion solution inserted into the clamp main body 131X. The cam side 1322X having a small cross-sectional radius is in light contact with the tube 3. In this case, the infusion in the infusion tube 3 is hardly restricted (first mode).

  On the other hand, when the control unit 1331X detects the signal from the push switch SW due to the release of the pump door 210, the control unit 1331X drives the servo motor 1330M, and the worm gear mechanism moves the clamp body 132X around the cam shaft 1321X. Rotate by a predetermined angle along the Z direction. Thereby, the cam surface 1322X having a large cross-sectional radius comes into contact with the infusion tube 3, and the flow path 30 of the infusion tube 3 is closed (second mode).

Also in the above-mentioned clamp 13X, the same free flow countermeasure as in the first embodiment can be performed. Further, in the clamp 13X, the cam body 132X can be manually rotated separately from the drive of the servo motor 1330M, so that a nurse can also be used as a general clamp.
In the fifth embodiment, the cam main body 132X has a cochlear cross-sectional shape, but naturally the shape of the cam main body is not limited to this, and the cylindrical body is pivotally supported in an eccentric state. It is good also as a structure, and it is good also as a structure which makes it provide a processus | protrusion partially in the side surface of a cylindrical body, and presses and closes the side surface of an infusion tube by this.

<Other matters>
In the first embodiment, the clamp body 10 is arranged upstream of the infusion pump 2 with respect to the infusion tube 3, but the present invention is not limited to this, and the clamp body is located downstream of the infusion pump. 10 may be installed. Further, the clamp body 10 may be mounted over a plurality of the infusion tubes.

  In the first embodiment, blood transfusion and drug solution are circulated through the infusion tube 3, but naturally the transfusion is not limited to this, and other solutions such as water and physiological saline may be circulated. In addition, the clamp set 5 may be disposed in the infusion tube 3 used in the dialysis line, not limited to the infusion line administered to the patient.

  The infusion safety device of the present invention can be used not only for medical infusion pumps but also as a safety device for infusion sets such as infusions.

FIG. 3 is a perspective view showing a combination aspect of the infusion safety device (infusion tube direct arrangement type) and the infusion pump according to the first embodiment. It is a figure which shows the structure of a clamp set. It is a figure which shows operation | movement etc. of a clamp main body. It is a figure which shows the state which closed the door of the infusion pump. 6 is a diagram showing a configuration of an infusion safety device (integrated drip probe) according to Embodiment 2. FIG. FIG. 6 is a diagram showing a configuration of an infusion safety device (an infusion probe fixed type) according to a third embodiment. FIG. 6 is a diagram showing a configuration of an infusion safety device (electromagnetic valve type) according to a fourth embodiment. FIG. 6 is a diagram showing a configuration of an infusion safety device (combined clamp type) according to a fifth embodiment.

Explanation of symbols

SW push switch
PSW optical switch
1 Infusion pump system (infusion pump with infusion safety device)
2 Infusion pump
3 Infusion tube
4 Drip probe integrated clamp
5 Clamp set (infusion safety device)
10, 10X, 10Y Clamp body
11 Infusion bottle
12 drip tube
13 Clemme
13X Clemme (with infusion safety device)
15X shaft
16X probe mounting member
100 clamp housing
100Y solenoid valve mechanism
101 groove
102 Cam groove
103 internal organs
103Y, 104Y electromagnetic coil
105Y sliding column
106Y solenoid plunger
107Y passage
108Y, 130 wiring
110Y Control unit
120 Cam mechanism
121 Elliptical cam body
122 Cam shaft (Rotating shaft)
131X CLEMME body
132X cam body
133X Control unit
150 Button
151 Base part

Claims (9)

A clamp body having a portable structure independent of the infusion pump housing so that a predetermined portion of the infusion tube from the infusion source to the infusion supply destination can be clamped;
A first detection switch attached to the clamp body and detachably provided on the infusion pump, for detecting opening and closing of a door covering an infusion tube mounting position of the infusion pump;
Based on the detection signal of the first detection switch, the first mode for clamping the infusion tube when the door open state is detected, and the clamping operation when the door closed state is detected. And a control means for switching between the second mode to be canceled. 2. The infusion safety device according to claim 1, wherein the first detection switch is at least one of a push switch, an optical switch, a piezoelectric switch, and a slide switch. The clamp mechanism in the clamp body is a cam mechanism that presses the side surface of the infusion tube to adjust the flow state of the infusion in the infusion tube,
The control means includes
In the first mode, increasing the pressing force to block the flow of infusion,
3. The infusion safety device according to claim 1, wherein in the second mode, the pressing force is loosened to release the infusion solution flow state. The clamp mechanism in the clamp body is a solenoid valve interposed in an infusion tube,
The control means includes
In the first mode, the infusion volume is reduced by moving the solenoid valve to the closed state,
3. The infusion safety device according to claim 1, wherein in the second mode, the infusion volume is released by shifting the electromagnetic valve to an open state. Furthermore, provided in the infusion tube arrangement area covered by the door of the infusion pump housing, comprising a second detection switch for detecting the drop of the infusion tube in the area,
The control means, based on the detection signal of the second detection switch, switches to the third mode for clamping the infusion tube when the dropout of the infusion tube is detected in the closed state of the door in the second mode,
The door is opened after switching to the third mode, the third mode is maintained until the door is closed again, and the mode is switched to the second mode after the door is closed. Item 5. The infusion safety device according to any one of Items 2 to 4. 6. The infusion safety device according to claim 5, wherein the second detection switch is an optical switch. The infusion safety device according to any one of claims 1 to 6, wherein the clamp body is configured integrally with an infusion probe. The infusion safety device according to any one of claims 1 to 6, wherein the infusion safety device is configured integrally with a clamp. An infusion pump system with an automatic safety device, wherein the infusion safety device according to any one of claims 1 to 8 is combined with an infusion pump body.

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