JP2004105540A - Pump for medical use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump for medical use for forcibly providing an opportunity to allow an operator to reconfirm whether or not injection to be performed is proper. <P>SOLUTION: Injection is not immediately performed by only one-time depression of a start switch. A display part performs display to request reconfirmation by the operator concerning whether or not the injection to be performed is proper. A control part controls the injection not to be performed before re-depressing the start switch after the display. Thus, probability to perform improper injection is reduced, so that a medical accident is decreased. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical pump for injecting liquids such as various medical solutions and blood loaded in a syringe, an infusion bag and the like into a body.
[0002]
[Prior art]
When injecting a liquid into the body by a medical pump, a syringe or an infusion bag loaded with the liquid is attached to the medical pump, and a desired injection speed (eg, a ten-key switch provided on the medical pump) is set. (Injection amount per unit time) is set, and then the injection instruction section is operated. When the syringe or the infusion bag is exchanged in order to empty the syringe or the infusion bag during the injection or to change the type of liquid, the injection instruction section is operated after the exchange. In the case of this exchange, the injection instruction unit may be operated after resetting the liquid injection speed. Then, in the conventional medical pump, when the injection instruction unit is operated, the injection of the liquid into the body is immediately executed.
[0003]
[Problems to be solved by the invention]
However, setting an incorrect injection rate when setting the injection rate for the medical pump, or replacing the syringe or infusion bag with a different type of syringe or infusion bag from the original appropriate type when replacing a syringe or infusion bag, Forgetting to reset the injection rate after exchanging a syringe, an infusion bag or the like has occurred at medical sites. In these cases, the conventional medical pump immediately injects the liquid into the body by operating the injection instruction unit, and determines the type of syringe, infusion bag, and the like, the liquid injection speed, and the like by a doctor or nurse. Since an opportunity for the operator to reconfirm has not been forcibly given, improper injection is performed, and a medical accident resulting in death or the like actually occurs.
[0004]
Therefore, the invention of the present application reduces the possibility that an improper injection is performed, because the operator is forced to reconfirm whether the injection to be performed is appropriate or not. It is an object of the present invention to provide a medical pump that can reduce medical accidents.
[0005]
[Means for Solving the Problems]
In the medical pump according to the first aspect, even if the injection instruction unit is operated only once, the injection of the liquid into the body is not immediately executed, and first, the output unit outputs an output recognizable by the operator. The control unit controls the injection so as to be executed only by operating the injection instruction unit again after the output. For this reason, between the output by the output unit and the operation on the injection instruction unit after the output, an opportunity is provided for the operator to reconfirm whether or not the injection to be performed is appropriate.
[0006]
In the medical pump according to claim 2, the display unit displays the set liquid injection speed. For this reason, between the display on the display unit and the operation on the injection instruction unit after the display, an opportunity is provided for the operator to reliably confirm at least the liquid injection speed.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention applied to a syringe pump will be described with reference to FIGS. FIG. 2 shows the syringe pump of the present embodiment in a state where the syringe is mounted. The syringe pump 11 is provided with an operation / display unit 13, a handle unit 14, and a syringe mounting unit 15, which are upper surfaces of the housing 12. The operation / display unit 13 is provided with a large number of operation switches 16 and several display units 17, and the syringe mounting unit 15 is provided with a flange mounting unit 21, an outer cylinder mounting unit 22, and a slider 23. Although not shown, a syringe diameter detection unit and a control unit are provided in the housing 12.
The outer cylinder mounting portion 22 is provided with a ridge 24 extending along a part of the operation / display portion 13, and a V-shaped groove 25 is provided between the operation / display portion 13 and the ridge 24. Have been. A protrusion 26 having the same cross-sectional shape as the protrusion 24 is opposed to the end surface of the protrusion 24 on the slider 23 side, and a flange 27 is formed between the protrusion 26 and the end surface 27 of the operation / display unit 13 on the slider 23 side. The pressing plate 28 faces. The end face 27, the flange pressing plate 28, and the like constitute the flange mounting portion 21. The flange pressing plate 28 has the same V-shaped end surface shape as the groove 25, and is rotatably attached to the housing 12 by a pair of pins.
[0009]
A cylindrical portion 31 having an outer peripheral surface that is flat within a predetermined angle range is provided between the ridge 24 and the protruding portion 26, and has a cylindrical shape having an inner peripheral surface that matches the outer peripheral surface of the cylindrical portion 31. A knob 32 having a hook-like tip is externally inserted into the cylindrical portion 31. The knob 32 is provided with a cylindrical portion 33 that is longer than the knob 32 and coaxial with the knob 32.
[0010]
The cylindrical portion 33 protrudes into the housing 12 through the cylindrical portion 31 and is connected to one of the pins of the flange pressing plate 28 in the housing 12. The knob 32 and the cylindrical portion 33 are urged by a compression coil spring in a direction from the outside of the housing 12 to the inside of the housing 12. When the syringe is not mounted on the syringe mounting portion 15, the lower end surface of the knob 32 is in pressure contact with the outer surface of the housing 12, and the distal end of the flange pressing plate 28 is in pressure contact with the end surface 27.
[0011]
A drive shaft 34 for sliding the slider 23 and a guide shaft 35 for guiding the slider 23 during the slide are connected to the slider 23. The drive shaft 34 is connected to a drive mechanism in the housing 12. The slider 23 is provided with a pair of holding portions 36 for holding the inner cylinder of the syringe, and an operation switch 37 for operating the slider 23. When the operation switch 37 is pressed, the pair of holding portions 36 are separated from each other, so that the inner cylinder of the syringe can be held, and the slider 23 can be manually slid.
[0012]
To use the syringe pump 11 as described above, an operator such as a doctor or a nurse firstly moves the knob 32 away from the outer surface of the housing 12 against the urging force of the compression coil spring. The outer peripheral surface of the cylindrical portion 31 is moved. Along with this movement, the cylindrical portion 33 moves inside the cylindrical portion 31 in a direction from inside the housing 12 to outside the housing 12. Due to this movement of the cylindrical portion 33, the flange pressing plate 28 rotates in a direction in which the distal end of the flange pressing plate 28 is separated from the end surface 27, and a gap is formed between the end surface 27 and the flange pressing plate 28.
[0013]
When the knob 32 is separated from the outer surface of the housing 12 and the lower end surface of the knob 32 is slightly higher than the upper end surface of the cylindrical portion 31, the knob 32 and the cylindrical portion 33 can be rotated with respect to the cylindrical portion 31. it can. As described above, the outer peripheral surface of the cylindrical portion 31 is flat within a predetermined angle range, and the inner peripheral surface of the knob 32 also matches the outer peripheral surface of the cylindrical portion 31. Therefore, when the knob 32 and the cylindrical portion 33 are rotated with respect to the cylindrical portion 31, the cross section of the knob 32 does not correspond to the cross section of the cylindrical portion 31.
[0014]
As a result, even if the force that separates the knob 32 from the outer surface of the housing 12 against the urging force of the compression coil spring is released, the knob 32 remains on the cylindrical portion 31 and the outer surface of the housing 12 remains. Do not approach. Therefore, in this state, the syringe 41 loaded with the liquid is mounted on the syringe mounting section 15. In this mounting, the outer cylinder 42 of the syringe 41 is mounted on the outer cylinder mounting part 22, and the flange part 43 of the outer cylinder 42 is inserted into a gap formed between the end face 27 and the flange pressing plate 28. The width of this gap is determined to a value that allows the thickest flange portion 43 of the various types of syringes 41 to be inserted.
[0015]
In addition, the slider 23 is manually slid to a position where the inner cylinder 44 can be held by the holding portion 36 while the operation switch 37 is pressed to separate the pair of holding portions 36 from each other. Then, at that position, the pressing of the operation switch 37 is released, and the pair of holding portions 36 are brought closer to each other, and the inner cylinder 44 is held by these holding portions 36. Thereafter, the knob 32 and the cylindrical portion 33 are rotated relative to the cylindrical portion 31 in a direction opposite to the above-described rotation until the cross section of the knob 32 corresponds to the cross section of the cylindrical portion 31.
[0016]
As a result, the knob 32 moves on the outer peripheral surface of the cylindrical portion 31 in a direction approaching the outer surface of the housing 12 by the urging force of the compression coil spring. Along with this movement, the cylindrical portion 33 moves inside the cylindrical portion 31 in a direction from the outside of the housing 12 to the inside of the housing 12. Due to this movement of the cylindrical portion 33, the flange pressing plate 28 rotates in a direction in which the distal end of the flange pressing plate 28 approaches the end surface 27, and the flange pressing plate 28 presses the flange portion 43, so that the flange portion 43 has an end surface. 27. Although the knob 32 approaches the outer surface of the housing 12 even after the flange 43 presses against the end surface 27, the knob 32 presses the outer cylinder 42 of the syringe 41 and the outer cylinder 42 presses against the inner surface of the groove 25. The knob 32 does not move any further.
[0017]
When the syringe 41 is correctly mounted on the syringe mounting portion 15, the knob 32 is stationary while pressing the outer cylinder 42, and the position of the knob 32 corresponds to the diameter of the outer cylinder 42. Therefore, the diameter of the outer cylinder 42 is obtained by the syringe diameter detection unit. If the diameter is out of the standard, the display unit 17 warns and displays the fact and injection cannot be started. If the diameter of the outer cylinder 42 is within the standard, the type of the syringe 41 is displayed on the display unit 17, and the sliding speed of the slider 23 for obtaining a desired injection speed is determined from this diameter.
[0018]
When the syringe 41 is mounted on the syringe mounting section 15 as described above, the desired injection speed is set to the syringe pump 11 by pressing the ten-key switch 16a of the operation switches 16 next. However, the injection speed set for the syringe pump 11 is stored in the control unit even if the previous injection has already been completed or the power supply to the syringe pump 11 has been stopped.
[0019]
Therefore, when the current mounting of the syringe 41 to the syringe mounting section 15 is for exchanging the syringe 41 or the like and there is no need to change the injection speed that has been set, the injection speed by pressing the numeric key switch 16a is reduced. No settings are required. The order of mounting the syringe 41 and setting the injection speed may be opposite to the above-described order. In any case, if the injection speed has been set even once, the injection speed is displayed on the display unit 17.
[0020]
In this state, the controller is in step 51 of FIG. 1, where the injection is stopped and not yet performed. The control by the control unit immediately proceeds from step 51 to step 52, and the control unit checks whether the start switch 16b of the operation switches 16 has been pressed, that is, whether the injection instruction unit has been operated. If the control unit does not detect in step 52 that the start switch 16b has been pressed, the control unit repeats the process in step 52 at predetermined time intervals, for example, every 20 milliseconds, and determines whether the start switch 16b has been pressed. Keep checking.
[0021]
When the control unit detects that the start switch 16b has been pressed in step 52, the control by the control unit shifts from step 52 to step 53, and the control unit displays a display requesting reconfirmation by the operator of the syringe pump 11. It is displayed on the display unit 17. More specifically, for example, the display unit 17 displays the phrase “I am trying to inject, reconfirm the syringe and the injection speed, and press the start switch.” The operator looks at this display and reconfirms the type of the syringe 41, the mounting state of the syringe 41, the liquid injection speed, and the like.
[0022]
After the above-described display, the control by the control unit shifts from step 53 to step 54, and after the reconfirmation, the control unit checks whether the start switch 16b has been pressed again. If the start switch 16b has not been pressed, the control by the control unit shifts from step 54 to step 55, and the control unit checks whether any operation switch 37 other than the start switch 16b has been pressed.
[0023]
If the operator notices an error in the injection speed in the above reconfirmation, the operator can reset the correct injection speed by pressing the numeric key switch 16a at that time, and in this case, the operation switches 37 other than the start switch 16b are pressed. The controller detects in step 55 that this has been done. Then, the control by the control unit returns from step 55 to step 52, and the processing after step 52 is performed again.
[0024]
If the control unit does not detect in step 55 that the operation switch 16 other than the start switch 16b has been pressed, the control by the control unit returns from step 55 to step 54, and the processing after step 54 is performed again. If the control unit does not detect in steps 54 and 55 that both the start switch 16b and the operation switch 37 other than the start switch 16b have been pressed, the processing in steps 54 and 55 is performed at predetermined time intervals, for example, every 40 milliseconds. Repeatedly, it continues to check whether any of the operation switches 37 has been pressed.
[0025]
When the control unit detects in step 54 that the start switch 16b has been pressed after the above reconfirmation, the control by the control unit shifts from step 54 to step 56, and the control unit causes the driving mechanism to slide the slider 23. Let it start. When the slider 23 slides, the flange portion 45 of the inner cylinder 44 of the syringe 41 is pushed by the slider 23, and the liquid into the body via a tube (not shown) connected to the injection end of the outer cylinder 42 of the syringe 41. Is performed.
[0026]
That is, in the syringe pump 11, even if the start switch 16b is pressed only once, the injection of the liquid into the body is not immediately performed, and first, the display unit 17 displays a request for reconfirmation by the operator. After this display, the control unit controls so that the injection is executed only by pressing the start switch 16b again. Therefore, between the display by the display unit 17 and the pressing operation on the start switch 16b after the display, an opportunity is provided for the operator to reconfirm whether the injection to be performed is appropriate or not. .
[0027]
In the above embodiment, the start switch 16b serves as an injection instruction section, and injection is performed by pressing the injection switch. For example, even if the rotary knob is used as an injection instruction section, injection is performed by the rotation operation. Good. Further, the request for reconfirmation to the operator may be any output that can be recognized by the operator, and is not limited to the display of the wording on the display unit 17; May be turned on. Further, in the above embodiment, the present invention is applied to a syringe pump, but the present invention can be applied to a medical pump other than the syringe pump, such as an infusion pump.
[0028]
【The invention's effect】
In the medical pump according to claim 1, between the output by the output unit and the operation on the injection instruction unit after the output, there is an opportunity for the operator to reconfirm whether or not the injection to be performed is appropriate. Given by force. For this reason, the possibility that an inappropriate injection is performed can be reduced, and medical accidents can be reduced.
[0029]
In the medical pump according to the second aspect, between the display on the display unit and the operation on the injection instruction unit after the display, an opportunity is provided for the operator to surely confirm at least the liquid injection speed at least. . Since there are many errors in the liquid injection speed in the medical accidents related to the injection of the liquid by the syringe, the medical accidents can be reduced by surely reconfirming the error.
[Brief description of the drawings]
FIG. 1 is a flowchart of control in an embodiment of the present invention.
FIG. 2 is a plan view of a syringe pump as one embodiment of the present invention.
[Explanation of symbols]
11: Syringe pump (medical pump), 16b: Start switch (injection instruction unit), 17: Display unit (output unit)

Claims (2)

An injection instruction unit for instructing the injection of liquid into the body,
An output unit for performing an output recognizable by an operator;
A control unit that causes the output unit to perform the output in response to a first operation on the injection instruction unit while the injection is stopped, and executes the injection in response to an operation on the injection instruction unit after the output. A medical pump comprising: The medical pump is a syringe pump,
The output unit is a display unit,
The medical pump according to claim 1, wherein the display unit displays the liquid injection speed set in the syringe pump.

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