JP2020031731A - Medical instrument - Google Patents

Abstract

To provide a medical instrument capable of suppressing deterioration in operability even when foreign matter such as fluid adheres.SOLUTION: A medical instrument includes: an operation receiving unit; a position acquisition unit for acquiring position information based on a position of a detection object in contact with or close to the operation receiving unit on the operation receiving unit at an acquisition timing that occurs at a predetermined cycle; and a control unit for determining an operation position for the detection object on the operation receiving unit at a latest acquisition timing on the basis of the position information acquired at the acquisition timing prior to the latest acquisition timing.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a medical device, and particularly to a medical device that accepts an input operation by an operator.

  2. Description of the Related Art There is known a medical device that includes an input device that receives an input operation by an operator, sets a setting value based on the received input operation, and operates based on the set setting value. As such a medical device, for example, a syringe containing a liquid such as a drug solution is placed, and the speed at which the pusher of the placed syringe is pushed out is controlled according to a set value set by an operator. And a syringe pump for sending a liquid into a living body such as a patient while controlling the flow rate. In a medical device such as a syringe pump, a rotating member such as a dial may be used as an input device used for setting a predetermined setting value such as an administration speed, and the setting value may be increased or decreased according to the rotation amount of the rotating member. (For example, see Patent Document 1).

JP 2008-253738 A

  In a medical device using a rotating member as an input device, a gap is easily formed between the rotating member and a member such as a housing provided with the rotating member. When a liquid such as a highly viscous chemical solution or other foreign matter enters into such a gap, it becomes difficult to rotate the rotating member, and there is a possibility that operability may be reduced.

  An object of the present disclosure is to provide a medical device capable of suppressing a decrease in operability even when a foreign substance such as a liquid adheres.

  The medical device according to the first aspect of the present invention is configured such that, at an acquisition timing that is generated at a predetermined cycle, the operation target and the detection target that comes into contact with or approach the operation reception unit are positioned on the operation reception unit. A position acquisition unit capable of acquiring position information based on the position information acquired at an acquisition timing earlier than the latest acquisition timing, based on the operation on the operation reception unit of the detection target at the latest acquisition timing. A control unit for determining a position.

  In the medical device as one embodiment of the present invention, the control unit may obtain position information acquired at an acquisition timing two times earlier than the latest acquisition timing, and acquire the position information acquired one time earlier than the latest acquisition timing. The operation position at the latest acquisition timing is determined based on whether or not the position information acquired at the timing matches.

  In the medical device as one embodiment of the present invention, the control unit may be configured to determine that the position information acquired at the two-time acquisition timing does not match the position information acquired at the one-time acquisition timing. The position indicated by the position information acquired at the latest acquisition timing is determined as the operation position at the latest acquisition timing.

  In the medical device as one embodiment of the present invention, the control unit may be configured to determine that the position information acquired at the two-time previous acquisition timing matches the position information acquired at the one-time previous acquisition timing. The position indicated by the matching position information is determined as the operation position at the latest acquisition timing.

  In the medical device as one embodiment of the present invention, the control unit sets a predetermined set value based on a change in the determined operation position in a circumferential direction around a predetermined center point on the operation reception unit. Increase or decrease.

  In the medical device as one embodiment of the present invention, the position acquisition unit has a plurality of detection regions arranged along the circumferential direction, and acquires any of the plurality of detection regions as the position information. I do.

  According to the medical device of the present disclosure, a decrease in operability can be suppressed even when a foreign substance such as a liquid adheres.

It is a perspective view of a syringe pump as medical equipment of one embodiment of the present invention. FIG. 2 is a block diagram illustrating a configuration of the syringe pump illustrated in FIG. 1. FIG. 2 is a diagram showing a detection area by a position acquisition unit provided in the syringe pump shown in FIG. 1. 3 is a flowchart showing an operation position determination process executed by the syringe pump shown in FIG. FIG. 4 is a diagram for explaining an example of a method of determining an operation position by the syringe pump shown in FIG. FIG. 4 is a diagram for explaining an example of a method of determining an operation position by the syringe pump shown in FIG. 3 is a flowchart illustrating a set value increasing / decreasing process executed by the syringe pump illustrated in FIG. 1.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each of the drawings, common components are denoted by the same reference numerals.

[Configuration of syringe pump]
FIG. 1 is a perspective view of a syringe pump 1 as a medical device according to one embodiment of the present invention. FIG. 1 shows the syringe pump 1 with a syringe 50 mounted thereon. As shown in FIG. 1, the syringe pump 1 is configured as a pump that sends a liquid stored in a hollow portion 52 of a syringe 50. FIG. 2 is a block diagram showing a configuration of the syringe pump 1.

  As shown in FIGS. 1 and 2, the syringe pump 1 includes a mounting section 11, a slider 12, a clamp 14, a cylinder flange holder 15, a circuit section 20, an input button group 31, and a display section 32. , A slider driving unit 36, an operation receiving unit 40, a housing 46, and a position obtaining unit 60.

As shown in FIG. 1, a syringe 50 can be placed on the placement section 11. The syringe 50 mounted on the mounting part 11 has a cylindrical cylinder 51 defining a hollow part 52 therein, and a syringe 50 inserted into the hollow part 52 from the base end side of the cylinder 51. A pusher 55 capable of moving the hollow portion 52 along the extending direction A of the cylinder 51 (hereinafter, simply referred to as “extending direction A”) while closely contacting in the circumferential direction without any gap. The cylinder 51 has a cylinder flange 53 at the base end, and defines an exit hole 54 at the tip end for communicating the hollow portion 52 with the outside. A flexible tube can be connected to the tip of the cylinder 51. When the tube is connected to the end portion of the cylinder 51, the outlet hole 54 is a flow path communicating with that is more compartments in the tube. The hollow portion 52 of the syringe 50 contains a liquid such as a drug solution. Hereinafter, in the extending direction A, the distal end of the cylinder 51 is referred to as “distal end in the extending direction A”, and the proximal end of the cylinder 51 is referred to as “proximal in the extending direction A”.

  As shown in FIG. 1, the mounting section 11 can mount the cylinder 51 of the syringe 50. As shown in FIG. 1, when the cylinder 51 of the syringe 50 is mounted on the mounting portion 11, the cylinder flange holder 15 stores a part of the cylinder flange 53. Thereby, the position of the cylinder 51 with respect to the syringe pump 1 is fixed.

  As shown in FIG. 1, the slider 12 has a presser fixing portion 13. The slider 12 is movable so as to engage with the pusher 55 of the syringe 50 mounted on the mounting portion 11. Specifically, the slider 12 is movable along the extending direction A at a position closer to the proximal end in the extending direction A than the pusher 55 of the syringe 50 mounted on the mounting portion 11. The slider 12 fixes the presser 55 of the syringe 50 mounted on the mounting portion 11 by the presser fixing portion 13. When the pusher 55 is fixed to the slider 12 by the pusher fixing portion 13, the pusher 55 moves integrally with the slider 12 as the slider 12 moves in the extending direction A. At this time, the cylinder 51 mounted on the mounting portion 11 is fixed to the syringe pump 1 in the extending direction A by the cylinder flange holder 15. Accordingly, when the slider 12 moves toward the distal end of the syringe 50, the pusher 55 moves toward the distal end relative to the cylinder 51, and the liquid contained in the hollow portion 52 is discharged from the outlet hole 54. Therefore, the liquid stored in the hollow portion 52 can be sent into the living body through a flow path defined by a tube connectable to the distal end of the cylinder 51.

  As shown in FIG. 1, the clamp 14 is movable along a direction B orthogonal to the extending direction A, and clamps the cylinder 51 of the mounted syringe 50 with the mounting portion 11. It is possible to fix. Also, by fixing the cylinder 51 with the clamp 14, a part of the cylinder flange 53 is less likely to come off from the cylinder flange holder 15, so that the cylinder 51 is firmly fixed to the syringe pump 1.

  As shown in FIG. 2, the circuit unit 20 includes a communication unit 21, a clock unit 22, a storage unit 23, and a control unit 24.

  The communication unit 21 includes an interface that transmits and receives information to and from an information processing device such as an external computer by wireless communication or wired communication.

The timer 22 measures time and ticks the time. The clock unit 22 can be realized by, for example, an RTC (Real Time Clock). The clock unit 22 includes a control unit 24
May be realized as one function.

  The storage unit 23 includes, for example, a storage device, and stores various information and programs. Specifically, the storage unit 23 stores a program for executing a set value increase / decrease process, various input support processes, and the like, which are executed by the control unit 24. Further, the storage unit 23 drives the slider driving unit 36 based on the information of the predetermined set values such as the flow rate and the dose of the liquid sent by the syringe pump 1 based on the predetermined set values, and sends the liquid. Is stored. In addition, the storage unit 23 stores the position information acquired by the position acquisition unit 60. Details regarding the position information stored in the storage unit 23 will be described later.

  The control unit 24 includes a processor that realizes a predetermined function by reading predetermined information and a program from among various information and programs stored in the storage unit 23, for example, and controls the entire operation of the syringe pump 1. The control unit 24 specifies an operation input from the operation reception unit 40 based on a detection target such as an operator's fingertip, as described later. Specifically, the control unit 24 reads predetermined information and a program stored in the storage unit 23, and executes processes such as an operation position determination process, a setting value increase / decrease process, and various input support processes. Details of the operation position determination processing and the setting value increase / decrease processing will be described later. The control unit 24 transmits and receives information to and from an external information processing device via the communication unit 21. The control unit 24 executes various processes based on the information input from the input button group 31 and the position acquisition unit 60, and outputs information accompanying the execution of the various processes from the display unit 32.

  As shown in FIG. 1, the input button group 31 is arranged on the surface of the housing 46 and includes various operation buttons capable of accepting an input operation by an operator. The input button group 31 includes, for example, a power button for switching on and off the operation power of the syringe pump 1, a start button for starting liquid supply, and a stop button for stopping liquid supply. The input button group 31 outputs the input information to the control unit 24.

  As shown in FIG. 1, the display unit 32 includes a display device such as a liquid crystal display or an organic EL display. The display unit 32 displays, based on a signal from the control unit 24, a set value and an actually measured value of the flow rate of the liquid to be sent, a set value and an actually measured value of the dose of the liquid to be sent, and various types of alarm information. Is displayed.

  The slider driving unit 36 includes, for example, a motor, and moves the slider 12 along the extending direction A (see FIG. 1) based on a signal from the control unit 24.

  As shown in FIG. 1, the operation receiving unit 40 is arranged so that at least a part thereof is exposed outside the syringe pump 1. The details of the operation receiving unit 40 will be described later.

  The position acquisition unit 60 can acquire position information based on a position on the operation reception unit 40 of a detection target such as a fingertip of an operator that comes into contact with or approaches the operation reception unit 40. The position acquisition unit 60 acquires position information at a predetermined acquisition timing. The predetermined acquisition timing occurs, for example, in a predetermined cycle. The predetermined acquisition timing occurs, for example, every 10 milliseconds. In this case, the position acquisition unit 60 acquires the position information every 10 milliseconds. However, the predetermined cycle is not limited to 10 milliseconds. The predetermined cycle may be determined as appropriate according to the use or specification of the operation receiving unit 40. The position acquisition unit 60 outputs the acquired position information to the control unit 24.

  The position acquisition unit 60 can acquire the position information of the detection target by, for example, generating an electric field around the operation reception unit 40 and detecting a disturbance of the electric field caused by the detection target approaching the operation reception unit 40. It is an electric field type position detection sensor. Alternatively, the position acquisition unit 60 is, for example, a capacitance type that can acquire position information of the detection target by detecting a change in capacitance caused by the detection target contacting the surface of the operation reception unit 40. It is a position detection sensor. When the position acquisition unit 60 is the above-described electric-field-type position detection sensor, even if the operator's finger does not directly touch the operation reception unit 40 by, for example, wearing an rubber glove, the detection is performed. The position information of the target can be obtained.

  FIG. 3 is a diagram illustrating an arrangement of detection areas as position information that can be acquired by the position acquisition unit 60. As illustrated in FIG. 3, the position acquisition unit 60 according to the present embodiment includes a plurality of detection regions, for example, eight detection regions arranged without a gap along a circumferential direction C around a predetermined center point 41 on the operation reception unit 40. It has fan-shaped detection areas 61a to 61h. Hereinafter, the eight detection areas 61a to 61h are also referred to as areas a to h, respectively.

  The position acquisition unit 60 acquires, as the position information of the detection target, the detection region closest to the detection target among the plurality of detection regions 61a to 61h. Specifically, for example, when the position acquisition unit 60 is configured by an electric field type position detection sensor, the position acquisition unit 60 acquires information indicating a position in a three-dimensional space of a detection target, and determines a detection area where the position is closest to the detection area. , As position information of a detection target. When the position acquisition unit 60 is configured by, for example, a capacitance-type position detection sensor, the plurality of detection regions can each detect a contact of the detection target, and the detection region that has detected the contact is detected by the position information of the detection target. To get as The position acquisition unit 60 outputs information of the detection area as the acquired position information to the control unit 24. Hereinafter, the position information of the detection target acquired by the position acquisition unit 60 is referred to as “position information”, and the detection region acquired as the position information of the detection target by the position acquisition unit 60 is referred to as “acquisition detection region”.

  As described above, the syringe pump 1 as the medical device of the present embodiment acquires the operation receiving unit 40 and the position information based on the position of the detection target in contact with or in proximity to the operation receiving unit 40 on the operation receiving unit 40. The control unit 24 includes a possible position acquisition unit 60 and a control unit 24 that specifies an operation input by a detection target based on a change in position information acquired by the position acquisition unit 60. This eliminates the need for the syringe pump 1 to provide a rotating member that physically rotates as an input device, so that a decrease in operability can be suppressed even when a foreign substance such as a liquid adheres. Further, since the syringe pump 1 does not need to be provided with a rotating member, it can be configured to have a small gap. Therefore, the cleaning property can be improved.

[Processing of syringe pump]
FIG. 4 is a flowchart illustrating an example of an operation position determination process performed by the syringe pump 1. The syringe pump 1 determines the operation position of the detection target on the operation reception unit 40 based on the position information acquired by the position acquisition unit 60 by the control unit 24. Here, the above-described position information is information about a detection area on the operation reception unit 40 to be detected, which is input from the operation reception unit 40 when the detection target is actually detected on the operation reception unit 40. . On the other hand, the operation position is an area on the operation reception unit 40 that is determined based on the above-described position information and is recognized as being input from the operation reception unit 40 instead of the above-described position information. The control unit 24 executes various controls using the above-described operation position as information input from the operation receiving unit 40 instead of the above-described position information. Details of the processing executed by the control unit 24 will be described later.

  Here, the syringe pump 1 does not recognize the detection area on the operation reception unit 40 where the detection target is actually detected, that is, the position information of the detection target as the operation position. As a result, malfunction may be avoided. For example, when the operator is trying to adjust a parameter or the like in the syringe pump 1 in an input operation to the operation reception unit 40, the operator may slowly move a finger to be detected. At this time, for example, when the contact state of the finger on the operation receiving unit 40 becomes unstable, the contact position of the finger on the operation receiving unit 40 may be blurred, and the finger may touch an area not intended by the operator. When the syringe pump 1 executes some processing based on such contact with an unintended area, the processing is not intended by the operator, and thus causes an erroneous operation for the operator. In such a case, the syringe pump 1 can avoid malfunction by not recognizing the detection area where the detection target is actually detected as the operation position where the operation is input.

  Therefore, the syringe pump 1 according to the present embodiment first determines an operation position at which it is recognized that an operation has been input, and then performs, for example, a setting value increase / decrease process based on the determined operation position, in order to easily avoid a malfunction. And various other processes. FIG. 4 shows an example of an operation position determination process executed by the syringe pump 1.

  In the operation position determination process, the syringe pump 1 uses the position acquisition unit 60 to acquire the position information of the detection target (Step S101). The syringe pump 1 acquires position information, for example, at each acquisition timing that occurs at a predetermined cycle. Here, it is assumed that the position acquisition unit 60 has acquired the position information at a cycle of 10 milliseconds. In step S101, position information of a detection target at the latest acquisition timing is acquired. The latest acquisition timing is the last acquisition timing by the position acquisition unit 60 at a certain time point (for example, at present).

  The position information acquired in step S101 is, for example, sequentially stored in the storage unit 23 (see FIG. 2) of the circuit unit 20 (see FIG. 2) together with the acquired time. In this way, the position information is accumulated, for example, in chronological order.

  The syringe pump 1 determines an operation position based on the position information acquired in step S101. Specifically, the syringe pump 1 determines the operation position at the latest acquisition timing based on the position information acquired at the acquisition timing before the latest acquisition timing. Here, the case where the syringe pump 1 determines the operation position at the latest acquisition timing based on the position information acquired at the acquisition timing one time before and two times before the latest acquisition timing. An example will be described with reference to steps S102 to S104 shown in FIG.

  The syringe pump 1 obtains the position information at the acquisition timing two times before the latest acquisition timing, that is, the acquisition timing 20 ms before, and the acquisition timing one time before the latest acquisition timing, that is, 10 ms before the latest acquisition timing. It is determined whether or not the position information at the acquisition timing matches (step S102).

  If the syringe pump 1 determines that the position information at the two previous acquisition timings and the position information at the one previous acquisition timing do not match (No at step S102), the position information acquired at the latest acquisition timing Is determined as the operation position at the latest acquisition timing (step S103).

  FIG. 5 is a diagram for explaining an example of a method of determining an operation position by the syringe pump 1. FIG. 5 shows the position information obtained by the position obtaining unit 60 and the operation position determined by the control unit 24. The names of the areas shown in FIG. 5 correspond to, for example, the names of the areas (that is, the detection areas 61a to 61h) shown in FIG. Further, the position information and the operation position shown in FIG. 5 are at the latest acquisition timing, the acquisition timing one time before the latest acquisition timing, and the acquisition timing two times before the latest acquisition timing. .

  In the example shown in FIG. 5, the area h is acquired as the position information at the acquisition timing two times before, and the area a is acquired as the position information at the acquisition timing one millisecond after the acquisition timing, and further, At the current acquisition timing, which is 10 milliseconds later, it indicates that area b has been acquired as position information. That is, in the example illustrated in FIG. 5, the position information at the two previous acquisition timings and the position information at the one previous acquisition timing do not match.

  If the syringe pump 1 determines that the position information at the two previous acquisition timings does not match the position information at the one previous acquisition timing as in the example shown in FIG. 5, the syringe pump 1 is acquired at the latest acquisition timing. The position indicated by the position information is determined as the operation position at the latest acquisition timing. In the example shown in FIG. 5, since the position information at the latest acquisition timing is “area b”, the syringe pump 1 uses “area b” as the acquired position information as the operation position at the latest acquisition timing. decide. That is, in this case, the position indicated by the position information acquired at the latest acquisition timing is determined as it is as the operation position.

  As shown in FIG. 5 as an example, when the position information at the two-time previous acquisition timing does not match the position information at the one-time previous acquisition timing, the operator touches the finger to be detected with the operation receiving unit 40. It is presumed that the user is trying to input some operation by moving the device while touching the device. Therefore, as described with reference to FIG. 5, the syringe pump 1 determines the position indicated by the position information acquired at the latest acquisition timing as the operation position as it is, thereby performing the input operation intended by the operator. Can be executed.

  On the other hand, when the syringe pump 1 determines that the position information at the previous acquisition timing and the position information at the previous acquisition timing match (Yes in step S102), the syringe pump 1 determines the position indicated by the matched position information. Is determined as the operation position at the latest acquisition timing (step S104). That is, in this case, regardless of the position information acquired at the latest acquisition timing, the position indicated by the position information acquired at the two previous acquisition timings and the position information acquired at the previous acquisition timing is the latest acquisition timing. Is determined as the operation position.

  FIG. 6 is a diagram for explaining an example of a method of determining an operation position by the syringe pump 1. FIG. 6 also shows the position information acquired by the position acquisition unit 60 and the operation position determined by the control unit 24, as in FIG.

  In the example shown in FIG. 6, the area a is acquired as the position information at the acquisition timing two times before, and the area a is acquired as the position information at the immediately preceding acquisition timing that is 10 ms later, and the area a is acquired. At the current acquisition timing, which is 10 milliseconds later, it indicates that area b has been acquired as position information. That is, in the example illustrated in FIG. 6, the position information at the two previous acquisition timings and the one previous acquisition timing match in “area a”.

  When the syringe pump 1 determines that the position information at the two previous acquisition timings matches the position information at the one previous acquisition timing as in the example shown in FIG. 6, the syringe pump 1 is indicated by the coincident position information. The position is determined as the operation position at the latest acquisition timing. In the example illustrated in FIG. 6, the position information at the two-time previous acquisition timing and the position information at the one-time previous acquisition timing are “area a”. Is determined as the operation position at the latest acquisition timing. That is, in this case, regardless of the position information acquired at the latest acquisition timing, the position indicated by the position information acquired at the two previous acquisition timings and the position information acquired at the previous acquisition timing is the latest acquisition timing. Is determined as the operation position.

  As illustrated in FIG. 6 as an example, when the position information at the two-time previous acquisition timing and the position information at the one-time previous acquisition timing match, the operator moves the finger to be detected to the matching position. It is inferred that the user is trying to maintain the state of contact with. At this time, for example, when the contact state of the finger on the operation receiving unit 40 becomes unstable, the contact position of the finger on the operation receiving unit 40 may be blurred, and the finger may touch an area not intended by the operator. However, if the acquisition positions match between the two previous acquisition timings and the one previous acquisition timing as in step S104, the contact state of the finger is unstable, and the operator may enter an unintended area. Even if the finger is in contact, the acquisition position at the latest acquisition timing is not treated as the operation position, so that the processing reflecting the intention of the operator can be easily performed.

  If the operator moves the finger in contact with the operation reception unit 40 for the purpose of, for example, changing the settings of the parameters or the like in the syringe pump 1, if the operator moves the finger next to the latest acquisition timing shown in FIG. At the acquisition timing, the position information becomes an area other than the area b (for example, area c). In this case, the acquisition timing two times before the “next acquisition timing” (that is, the acquisition timing described as “one-time acquisition timing” in FIG. 6) and the one-time before the next acquisition timing Since the position information at the acquisition timing (that is, the acquisition timing described as “latest acquisition timing” in FIG. 6) does not match, the syringe pump 1 executes step S103 in the flow of FIG. The operation position at the next acquisition timing is determined to be an area (for example, area c) which is a position indicated by the position information acquired at the next acquisition timing. By performing such a process, the syringe pump 1 can determine an operation position according to an input operation intended by the operator, and thus can execute a process according to the input operation.

  The syringe pump 1 can execute various processes based on the operation position determined in the operation position determination process shown in FIG. 4, for example. Here, as an example of a process executed by the syringe pump 1, a set value increasing / decreasing process will be described.

  FIG. 7 is a flowchart showing the set value increasing / decreasing process executed by the syringe pump 1. As illustrated in FIG. 7, the syringe pump 1 determines an operation position on the operation reception unit 40 to be detected based on the position information acquired by the position acquisition unit 60 (Step S201). Details of step S201 are, for example, as in the operation position determination processing described with reference to FIG.

  After that, the control unit 24 specifies the operation input by the detection target based on the time change of the operation position. The control unit 24 increases or decreases the predetermined set value based on, for example, a temporal change in the circumferential direction C (see FIG. 3) of the acquisition detection area. More specifically, the control unit 24 executes the following steps S202 to S207.

  The control unit 24 determines whether or not the operation position is temporally changed along the first circumferential direction D (see FIG. 3) which is one of the circumferential directions C (step S202). Specifically, the control unit 24 determines whether or not the acquisition detection area changes with time in the first circumferential direction D between two detection areas adjacent to each other, that is, for example, the acquisition detection area changes from the area a to the area a. It is determined whether the time has changed to b.

  When determining that the operation position is temporally changing along the first circumferential direction D (Yes in Step S202), the control unit 24 increases the predetermined setting value (Step S203). On the other hand, when the control unit 24 determines that the operation position has not changed with time in the first circumferential direction D (No in step S202), the process proceeds to step S204.

  The control unit 24 determines whether or not the operation position is temporally changed along the other side in the circumferential direction C, that is, the second circumferential direction E (see FIG. 3) opposite to the first circumferential direction D (see FIG. 3). Step S204). Specifically, the control unit 24 determines whether or not the acquisition detection area changes with time along the second circumferential direction E between two detection areas adjacent to each other, that is, for example, the acquisition detection area changes from the area a to the area a. It is determined whether or not the time has changed to h.

  When determining that the operation position is temporally changing along the second circumferential direction E (Yes in step S204), the control unit 24 decreases the predetermined set value (step S205). On the other hand, when the control unit 24 determines that the operation position has not changed over time in the second circumferential direction E (No in step S204), the process proceeds to step S206.

  The control unit 24 determines whether or not the operation position is constant for a predetermined time or more (Step S206). The predetermined time used in the processing of step S206 is stored in the storage unit 23 in advance, and is, for example, one second.

  When determining that the operation position is constant for a predetermined time or more (Yes in step S206), the control unit 24 determines whether the operation position has changed immediately before (step S207). In other words, in the process of step S207, the control unit 24 determines whether the operation position immediately before the first operation position used as the basis for the determination in the process of step S206 has changed. At this time, for example, if there is a period during which the position information of the detection target cannot be acquired by the position acquisition unit 60 because the detection target has once separated from the operation reception unit 40, the continuity regarding the previous change in the operation position is reset. Have been. That is, when the operation position is once determined to be “no touch”, only the position information of the detection target continuously acquired by the position acquisition unit 60 is the target of the determination in the process of step S207.

  When the control unit 24 determines that the operation position has changed immediately before (Yes in step S207), the control unit 24 changes the operation position along the direction in which the operation position changes immediately before in the first circumferential direction D and the second circumferential direction E. Then, the predetermined value is increased or decreased (step S208). Specifically, the control unit 24 increases the predetermined set value when the direction in which the operation position has just changed in time immediately before is the first circumferential direction D. On the other hand, when the direction in which the operation position has changed in time immediately before is the second circumferential direction E, the control unit 24 decreases the predetermined set value. Thereafter, the control unit 24 continues to increase or decrease the predetermined set value while the operation position is constant.

  When the control unit 24 determines that the operation position is not constant for a predetermined time or more (No in step S206), or determines that the operation position has not changed immediately before (No in step S207), The predetermined set value is not changed (step S209).

  As described above, when the operation position is constant for a predetermined time or more and the operation position has been changed immediately before, the syringe pump 1 is provided with the predetermined position along the direction in which the operation position was changed immediately before. Since the setting value is increased or decreased, the operator can continuously increase or decrease the predetermined setting value along the direction in which the detection target was moved immediately before, without moving the detection target.

  In the process of step S208, the control unit 24 may increase or decrease the predetermined set value by a constant change amount per unit time. Thus, the operator can estimate the remaining time for the predetermined set value to reach the target value by confirming the predetermined set value that changes at a constant speed on the display unit 32. The value can be easily set to the target value.

  In the process of step S208, the control unit 24 may increase or decrease the predetermined set value by a change amount per unit time according to a change amount per unit time of the position information that has just changed. In other words, the control unit 24 may determine the amount of change per unit time of the predetermined set value according to the amount of change per unit time of the position information that has just changed. Specifically, the control unit 24 may increase the change amount of the predetermined set value per unit time as the change amount of the position information changed immediately before per unit time is larger. As described above, the syringe pump 1 determines the change speed of the predetermined set value in accordance with the change speed of the position information that has changed immediately before. Can be changed.

  In the above-described embodiment, the cycle in which the acquisition timing occurs is described as 10 ms, but the cycle in which the acquisition timing occurs is not limited to 10 ms. The cycle at which the acquisition timing occurs may be appropriately determined according to, for example, the size or shape of the operation receiving unit 40, the content of the processing executed by the syringe pump 1, and the like. The period at which the acquisition timing occurs is preferably, for example, 5 ms to 100 ms, and more preferably 5 ms to 50 ms. By setting the period at which the acquisition timing occurs to be equal to or less than the upper limit of the above range, for example, when the position of the detection target is quickly changed, the control unit 24 determines that the direction in which the detection target has actually rotated is reversed. The possibility of erroneous recognition can be reduced.

  The process described with reference to FIG. 4 may be executed when a predetermined condition is satisfied. The predetermined condition may be appropriately determined according to the processing that can be executed by the syringe pump 1. For example, when the syringe pump 1 has a plurality of operation modes and operates in a specific operation mode among the plurality of operation modes, the processing described with reference to FIG. 4 may be executed.

  For example, the syringe pump 1 may have two operation modes, a first operation mode and a second operation mode. The syringe pump 1 executes an input operation receiving process in one of the first operation mode and the second operation mode in response to an input operation performed by the operator on the operation reception unit 40.

  The first operation mode is a mode for detecting a high-speed input by the operator. For example, when the operator is moving at a high speed with the finger in contact with the operation receiving unit 40, the syringe pump 1 operates in the first operation mode. The first operation mode is executed, for example, when the operator significantly changes settings such as parameters set in the syringe pump 1.

  The second operation mode is a mode for detecting a low-speed input by the operator. For example, when the operator is moving at a low speed with the finger in contact with the operation receiving unit 40, the syringe pump 1 operates in the second operation mode. The second operation mode is executed, for example, when the operator attempts to adjust settings such as parameters set in the syringe pump 1.

  The syringe pump 1 stores, for example, in the storage unit 23, a reference for determining whether the input by the operator is high speed or low speed. For example, in the example of the operation receiving unit 40 described with reference to FIG. 3, the syringe pump 1 is configured such that when the operator moves his or her finger in a predetermined number of areas or more within a predetermined time, the operator The input may be determined to be fast. Conversely, in the example of the operation receiving unit 40 described with reference to FIG. 3, the syringe pump 1 is configured such that, when the operator moves his finger less than a predetermined number of areas within a predetermined time, the operator May be determined to be slow.

  For example, if the syringe pump 1 detects movement of five or more areas within 50 milliseconds, the syringe pump 1 may execute the process in the first operation mode. In addition, the syringe pump 1 may execute a process of changing the mode from the second operation mode to the first operation mode when the movement of the area number of 5 or more is detected in the latest within 50 milliseconds. Conversely, if the syringe pump 1 detects movement of less than 5 areas within 50 milliseconds, for example, the syringe pump 1 may execute the process in the second operation mode. In addition, the syringe pump 1 may execute a process of changing the mode from the first operation mode to the second operation mode, for example, when the movement of the number of areas less than 5 is detected in the latest within 50 milliseconds. Note that the threshold value used by the syringe pump 1 to determine the operation mode may be determined as appropriate according to, for example, the size or shape of the operation receiving unit 40, the content of the processing executed by the syringe pump 1, and the like.

  For example, the syringe pump 1 may execute the process described with reference to FIG. 4 when the condition that the syringe pump 1 is operating in the second operation mode is satisfied. As described above, the second operation mode is a mode that is executed when the operator attempts to adjust the settings. At this time, for example, when the operator touches an unintended area while operating the finger with the intention of maintaining the finger in the same area in the operation reception unit 40, the setting in the syringe pump 1 changes. This causes a malfunction. However, according to the operation position determination processing described with reference to FIG. 4, for example, such a malfunction can be avoided. Therefore, it is possible to reduce the trouble of re-setting by an unintended operation of the operator and the stress on the operator.

  The present invention is not limited to the configuration specified in each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention described in the claims. For example, functions included in each component, each step, and the like can be rearranged so as not to be logically inconsistent, and a plurality of components, steps, or the like can be combined into one or divided. It is.

  In the present embodiment, as the process of the syringe pump 1, the process of increasing or decreasing the predetermined set value based on the time change of the operation position has been described. However, the process is not limited to such a process. The process of the syringe pump 1 may be any process that specifies the operation input by the detection target, such as switching a selection item, based on the time change of the operation position.

  In the present embodiment, the medical device is described as a syringe pump, but the medical device is not limited to this. Examples of the other medical devices include a liquid delivery device such as an infusion pump, a nutrition pump, and a blood pump, an ultrasonic diagnostic imaging device, and an optical diagnostic imaging device.

  The present disclosure relates to a medical device, and particularly to a medical device that accepts an input operation by an operator.

1: Syringe pump (medical equipment)
11: Mounting part 12: Slider 13: Presser fixing part 14: Clamp 15: Cylinder flange holder 20: Circuit part 21: Communication part 22: Clock part 23: Storage part 24: Control part 31: Input button group 32: Display Unit 36: Slider drive unit 40: Operation accepting unit 41: Center point 46: Housing 50: Syringe 51: Cylinder 52: Hollow part 53: Cylinder flange 54: Exit hole 55: Pusher 60: Position acquisition units 61a to 61h: Detection Area A: Extension direction of the cylinder of the placed syringe B: Moveable direction of clamp C: Circumferential direction D: First circumferential direction E: Second circumferential direction

Claims (6)

An operation receiving unit,
At an acquisition timing that occurs in a predetermined cycle, a position acquisition unit that can acquire position information based on a position on the operation reception unit of a detection target that contacts or approaches the operation reception unit,
A control unit that determines an operation position on the operation reception unit of the detection target at the latest acquisition timing, based on the position information acquired at the acquisition timing before the latest acquisition timing,
Medical equipment provided with.   The control unit may determine whether the position information acquired at the acquisition timing two times earlier than the latest acquisition timing matches the position information acquired at the acquisition timing one time earlier than the latest acquisition timing. The medical device according to claim 1, wherein the operation position at the latest acquisition timing is determined based on whether or not the medical device is operated.   The control unit, if the position information acquired at the two-time acquisition timing does not match the position information acquired at the one-time acquisition timing, the position information acquired at the latest acquisition timing. The medical device according to claim 2, wherein the position indicated by is determined as the operation position at the latest acquisition timing.   The control unit, when the position information acquired at the two-time previous acquisition timing and the position information acquired at the one-time previous acquisition timing match, the position indicated by the coincident position information, The medical device according to claim 2, wherein the operation position is determined as the operation position at the latest acquisition timing.   5. The control unit according to claim 1, wherein the control unit increases or decreases a predetermined set value based on a change in the determined operation position in a circumferential direction around a predetermined center point on the operation reception unit. The medical device according to claim 1.   The position acquisition unit has a plurality of detection regions arranged along a circumferential direction around a predetermined center point on the operation reception unit, and acquires any of the plurality of detection regions as the position information. The medical device according to any one of claims 1 to 5, wherein

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