JP2012029791A - Negative pressure treatment apparatus and control method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a negative pressure treatment apparatus 10 and a control method for the negative pressure treatment apparatus 10 capable of acquiring the healed condition of a wound W without removing a covering sheet S for covering the wound W and manually or automatically adjustable in the supply amount of washing liquid to the wound W.SOLUTION: The negative pressure treatment apparatus 10 includes a delivery pump 2 delivering a fluid (the washing liquid) supplied through a supply passage 1, into a closed space formed covering the wound W with the covering sheet S, through a delivery tube 3; a suction pump 5 sucking the fluid (the washing liquid and a body fluid) from the closed space through a suction tube 4 while maintaining the closed space in a negative pressure state; a suction amount measuring means 7 measuring the suction amount of the fluid sucked through the suction tube 4; an arithmetic means 8 computing the difference between the suction amount measured by the suction amount measuring means 7 and the delivery amount of the fluid delivered by the delivery pump 2; and a display means 9 for displaying the computed value.

Description

  The present invention relates to a negative pressure treatment device and a method for controlling a negative pressure treatment device.

  Conventionally, as a negative pressure treatment device, a wound portion such as a skin ulcer or tissue defect is covered with a covering sheet to form a closed space around the wound portion, and a cleaning solution such as physiological saline is supplied into the closed space, 2. Description of the Related Art There is known a treatment apparatus that sucks a body fluid that exudes from a wound portion together with a cleaning liquid while keeping the closed space in a negative pressure state (for example, see Patent Documents 1 and 2 below).

  According to such a negative pressure treatment device, the wound part can be washed to remove necrotic cells, bacteria, and the like from the wound part, and the negative blood pressure can promote blood flow in the wound part to enhance the healing effect.

Special table 2008-538662 gazette Special table 2007-509683

  By the way, when this negative pressure treatment is performed, since a relatively large amount of body fluid oozes out from the wound part in the initial stage of treatment, it is necessary to supply a large amount of washing liquid to the wound part (for example, 5000 cc / day). . Then, as the healing of the wound progresses, the supply amount of the cleaning liquid is reduced (for example, 2000 cc / day).

  However, conventionally, in order to grasp the healing state of the wound part, it is necessary to peel off the covering sheet from the wound part, remove the porous pad, and actually visually recognize the wound part. There were difficulties. Moreover, there was a possibility of infecting with bacteria or the like every time the covering sheet was peeled off.

  The present invention has been made in view of the above-mentioned drawbacks in the conventional negative pressure treatment device, and grasps the healing state of the wound part without actually peeling off the covering sheet covering the wound part. An object of the present invention is to provide a negative pressure treatment apparatus capable of adjusting the supply amount of cleaning liquid to a wound part manually or automatically and a control method thereof.

  The present invention provides a delivery pump for delivering a fluid supplied through a supply flow path through a delivery tube into a closed space formed by covering a wound portion with a covering sheet, and the closed space while maintaining the closed space in a negative pressure state. A suction pump for sucking fluid through the suction tube, a suction amount measuring means for measuring the suction amount of the fluid sucked through the suction tube, a suction amount measured by the suction amount measuring means, and a fluid sent by the delivery pump An arithmetic means for calculating a difference from the delivery amount and a display means for displaying a calculated value calculated by the arithmetic means are provided.

  Further, the present invention is characterized by comprising control means for controlling the delivery pump in accordance with the calculated value calculated by the calculating means.

  Further, the present invention is characterized in that the suction amount measuring means is a flow meter provided in the suction tube or a discharge flow channel connected to the suction tube.

  Further, the present invention is characterized in that the suction amount measuring means is a Coriolis flow meter.

  Further, the present invention is characterized in that the suction amount measuring means is a liquid level meter provided in a discharge container connected to the suction tube via a discharge flow path.

  Further, the present invention is characterized in that the suction amount measuring means is a capacitance type liquid level gauge.

The present invention also provides a delivery pump for delivering the fluid supplied through the supply flow path through a delivery tube into a closed space formed by covering the wound portion with a covering sheet, while maintaining the closed space in a negative pressure state. A method for controlling a negative pressure treatment device comprising a suction pump for sucking fluid from a closed space through a suction tube,
A suction amount measuring step for measuring the suction amount of the fluid sucked through the suction tube, and a calculation step for calculating a difference between the suction amount measured by the suction amount measuring step and the delivery amount of the fluid sent by the delivery pump; A display step for displaying the calculated value calculated in the calculation step.

  In addition, the present invention is characterized by comprising a control step for controlling the delivery pump in accordance with the calculated value calculated in the calculating step.

  According to the negative pressure treatment device and the control method thereof according to the present invention, the amount of fluid sucked from the wound part can be measured, and the amount of body fluid exuded from the wound part can be calculated and displayed. Even without actually peeling off the covering sheet covering the skin, the healing state of the wound can be grasped, the treatment work can be greatly reduced, and the risk of infection such as bacteria can be further reduced.

  Moreover, since the delivery amount of the delivery pump can be adjusted manually or automatically according to the calculated value of the body fluid exuding from the wound part, it is possible to supply the wound part with an amount of washing liquid suitable for the healing state, The therapeutic effect can be enhanced.

  Further, since the cleaning liquid can be used efficiently, the amount of the cleaning liquid used can be saved, and the work of replenishing the cleaning liquid such as replacement of the cleaning liquid bag can be saved. Further, since the amount of the cleaning liquid used can be saved, there is no problem that the portability of the apparatus is lowered as a result of using the cleaning liquid bag having a relatively large capacity as in the conventional case, and the portability of the apparatus can be improved. .

  Furthermore, according to the negative pressure treatment device and the control method thereof according to the present invention, the amount of body fluid exuding from the wound part can be calculated and displayed, so that even when there is abnormal bleeding, for example, abnormal bleeding is immediately grasped. For example, it is possible to immediately cope with an abnormal situation by generating an alarm by an alarm means.

1 is a schematic overall view showing a negative pressure treatment apparatus of an embodiment. It is a schematic sectional drawing which shows the closed space formed in the wound part. It is explanatory drawing which shows an example of the control aspect of the negative pressure treatment apparatus of this embodiment. It is a schematic whole figure which shows the modification of the negative pressure treatment apparatus which concerns on this invention.

  As shown in FIG. 1, the negative pressure treatment device 10 of the present embodiment mainly includes a delivery pump 2 that delivers fluid (cleaning fluid) through a delivery tube 3 to a wound portion W such as a skin ulcer or a tissue defect, and a wound portion W. A suction pump 5 for sucking fluid (cleaning fluid and body fluid) through the suction tube 4, a discharge channel 6 and a discharge container 61 for discharging the sucked fluid, and a suction amount measuring means 7 for measuring the suction amount of the sucked fluid Calculating means 8 for calculating the amount of fluid exuding from the wound part W based on the suction amount measured by the suction amount measuring means 7, display means 9 for displaying the calculated value calculated by the calculating means 8, manual input, Or the control means 21 which controls the delivery pump 2 according to the calculated value calculated by the calculating means 8 is provided.

  As shown in FIG. 2, the wound portion W is provided with a porous pad P that is flexible and permeable to fluid (cleaning liquid), and a covering sheet S is attached so as to cover the wound portion W and the pad P. Yes. The covering sheet S forms a substantially airtight closed space C around the wound portion W, and the distal end openings of the delivery tube 3 and the suction tube 4 are drawn into the closed space C in advance.

  As shown in FIG. 1, the delivery pump 2 sends the fluid (cleaning solution) supplied from the cleaning solution bag B through the supply flow path 1 into the closed space C through the sending tube 3. In the present embodiment, a tube pump is used as the delivery pump 2 to sequentially squeeze a flexible tube forming at least a part of the supply flow path 1 with a rotary head to send fluid in the tube. By controlling the rotation of the rotary head of the tube pump by the control means 21, the fluid (cleaning liquid) can be sent out at a predetermined flow rate. In addition, as the delivery pump 2, other metering pumps, such as a piston pump, a diaphragm pump, a vane pump, can also be employ | adopted, for example. Moreover, as a washing | cleaning liquid, what added the required chemical | medical agent etc. to the physiological saline and physiological saline can be used, for example.

  The suction pump 5 sucks fluid (cleaning fluid and body fluid exuded from the wound part W) from the closed space C while keeping the closed space C in a negative pressure state through the suction tube 4. In this embodiment, a diaphragm type vacuum pump is adopted as the suction pump 5, and the fluid is sucked by reducing the pressure in the discharge container 61 that is detachably provided in the discharge flow path 6. The sucked fluid is stored in the discharge container 61. The suction pump 5 is controlled by control means (not shown) according to the negative pressure in the closed space C detected by the pressure sensor 51, and can maintain the negative pressure in the closed space C at a set level. As the suction pump 5, other pumps such as a tube pump and a vane pump can also be employed.

  The suction amount measuring means 7 includes a flow meter 71 provided in the middle of the discharge flow path 6 and measures the suction amount of fluid (cleaning liquid and body fluid) sucked through the suction tube 4. In this embodiment, a Coriolis type flow meter is adopted as the flow meter 71, and the flow rate of the sucked fluid can be measured with high accuracy. As the flow meter 71, other flow meters such as a float type flow meter, an impeller type flow meter, a differential pressure type flow meter, and an ultrasonic flow meter can be employed.

  The computing means 8 computes the difference between the amount of fluid (cleaning fluid and body fluid) measured by the flow meter 71 and the amount of fluid (cleaning fluid) delivered by the delivery pump 2. That is, since the difference between the suction amount measured by the flow meter 71 and the delivery amount by the delivery pump 2 corresponds to the amount of body fluid that has exuded from the wound part W, the amount of exudation of body fluid is calculated by obtaining the difference. Can do. In this embodiment, the fluid delivery amount of the delivery pump 2 is obtained from the control means 21, but for example, another suction amount measurement means is provided in the supply flow path 1 or the delivery tube 3, and the suction amount measurement means The fluid delivery amount of the delivery pump 2 may be obtained.

  The display means 9 displays the calculated value calculated by the calculating means 8 as the amount of body fluid that has exuded from the wound part W to the outside of the apparatus. In the present embodiment, a liquid crystal display device that displays the amount of body fluid on the display screen as a liquid crystal display device is employed as the display means 9, but other display devices such as a 7-segment display device can also be employed. Further, the display means 9 can be configured integrally with the operation screen of the negative pressure treatment device 10.

  The control means 21 controls the fluid delivery amount of the delivery pump 2 according to the calculated value calculated by the computing means 8. That is, the control means 21 increases or decreases the fluid delivery amount of the delivery pump 2 by comparing the value calculated by the computing means 8 with a preset body fluid reference value. For example, as shown in FIGS. 3 (a) and 3 (b), when the amount of fluid exudation (calculated value) decreases as the healing progresses, it becomes smaller than the body fluid reference value (X, Y, Z) (B, C, In D), the pump delivery amount of the delivery pump 2 is decreased by a predetermined amount.

  Thus, the negative pressure treatment device 10 of this embodiment operates the delivery pump 2 to deliver the fluid (cleaning fluid) in the cleaning fluid bag B set in advance into the closed space C of the wound portion W while delivering the fluid at a set flow rate. 5 is operated, and negative pressure treatment is performed by sucking the body fluid exuding from the wound part W together with the washing liquid while keeping the closed space C in the negative pressure state of the set level.

  Then, a suction amount measuring step of measuring the suction amount of the sucked fluid with the flow meter 71 is performed, and then a difference between the suction amount measured in the suction amount measuring step and the delivery amount of the fluid sent out by the delivery pump 2 is calculated. The calculation step calculated in step 8 is performed. And while performing the display step which displays the calculated value calculated by the calculation step with the display means 9, the operation | movement of the negative pressure treatment apparatus 10 is controlled by performing the control step which controls the delivery pump 2 according to the calculated value. To do.

  As described above, according to the negative pressure treatment device 10 of the present embodiment, the amount of fluid sucked from the wound part W is measured, the amount of fluid exuding from the wound part W is calculated, and displayed on the display means. Therefore, the healing state of the wound portion W can be grasped without actually removing the covering sheet S covering the wound portion W. Therefore, it is not necessary to peel off the covering sheet S and remove the pad P in order to grasp the healing state of the wound part W as in the past, so that the treatment work can be greatly reduced and the risk of infection such as bacteria can be reduced. .

  Further, since the fluid delivery amount of the delivery pump 2 can be controlled by the control means 21 in accordance with the calculated value of the body fluid that exudes from the wound part W, an amount of the cleaning liquid suitable for the healing state is supplied to the wound part W without excess or deficiency. It can be supplied and the therapeutic effect can be enhanced. Further, the fluid delivery amount of the delivery pump 2 can be appropriately increased or decreased by manual input by looking at the display of the body fluid exudation amount on the display means 8. In addition, since the cleaning liquid can be used efficiently, the amount of the cleaning liquid used can be saved, and the cleaning liquid replenishment work such as replacement of the cleaning liquid bag B can be saved. Further, since the amount of cleaning liquid used can be saved, there is no problem that the portability of the apparatus is reduced as a result of using the cleaning liquid bag B having a relatively large capacity as in the conventional case, and the portability of the apparatus can be improved. it can.

  In addition, according to the negative pressure treatment device 10 of the present embodiment, the amount of body fluid that exudes from the wound part W can be calculated and displayed on the display means. It is possible to grasp immediately and to deal with abnormal situations immediately. Further, alarm means can be provided in the arithmetic means 8 to generate an alarm when abnormal bleeding occurs.

  Further, according to the negative pressure treatment device 10 of the present embodiment, when there is a leak in the flow path of the cleaning liquid, the closed space C of the wound portion W, etc., the calculated value by the calculating means 8 becomes a negative value, for example. The occurrence of this leak can be immediately detected and dealt with.

  Further, according to the negative pressure treatment device 10 of the present embodiment, since the amount of body fluid exuding from the wound part W can be calculated, the cumulative amount of exudation of body fluid can be grasped, for example, the dirt of the pad P can be grasped, You can know when to replace it. This can also greatly reduce the treatment work.

  Moreover, according to the negative pressure treatment apparatus 10 of this embodiment, since the suction amount of the fluid sucked from the wound part W is measured, the storage amount of the fluid in the discharge container 61 can be grasped. Therefore, for example, a full warning of the discharge container 61 can be generated by a warning means.

  As mentioned above, although the negative pressure treatment apparatus 10 of this embodiment was demonstrated, this invention can be implemented also with another form.

  For example, you may implement like the negative pressure treatment apparatus 20 shown in FIG. The negative pressure treatment apparatus 20 is characterized in that the suction amount measuring means 7 for measuring the amount of fluid suction is composed of a liquid level gauge 72 provided in the discharge container 61. In this modification, a capacitance type liquid level gauge is adopted as the liquid level gauge 72, and through the suction tube 4 based on the change of the liquid level of the fluid (cleaning liquid and body fluid) stored in the discharge container 61. The suction amount of the sucked fluid (cleaning fluid and body fluid) is measured. In addition, as the liquid level gauge 72, other liquid level gauges such as a float type liquid level gauge and an ultrasonic type liquid level gauge can also be adopted.

  Then, the calculation means 81 calculates the difference between the suction amount of the fluid (cleaning liquid and body fluid) measured by the level gauge 72 and the delivery amount of the fluid (cleaning liquid) sent out by the delivery pump 2, and the display means 9 The calculated value is displayed, and the control means 21 controls the fluid delivery amount of the delivery pump 2 according to the calculated value.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It may be implemented in a form in which any invention specific matter is replaced with another technology within a range where the same action or effect occurs, or the invention specific matter configured integrally may be constituted by a plurality of members. In addition, the invention specific items constituted by a plurality of members may be implemented in an integrated configuration.

10, 20; Negative pressure therapy device 1; Supply flow path 2; Delivery pump 21; Control means 3; Delivery tube 4; Suction tube 5; Suction pump 6; Flow meter 72; Liquid level gauge 8, 81; Calculation means 9; Display means W; Wound part S; Cover sheet C;

Claims (8)

A delivery pump for delivering the fluid supplied through the supply channel through a delivery tube into a closed space formed by covering the wound with a covering sheet;
A suction pump for sucking fluid from the closed space through a suction tube while keeping the closed space in a negative pressure state;
A suction amount measuring means for measuring a suction amount of the fluid sucked through the suction tube;
Arithmetic means for calculating a difference between the suction amount measured by the suction amount measuring means and the delivery amount of the fluid delivered by the delivery pump;
Display means for displaying the calculated value calculated by the calculating means;
A negative pressure treatment device comprising:   The negative pressure therapy apparatus according to claim 1, further comprising a control unit that controls the delivery pump in accordance with a calculated value calculated by the calculation unit.   The negative pressure therapy apparatus according to claim 1, wherein the suction amount measuring unit is a flow meter provided in the suction tube or a discharge flow path connected to the suction tube.   The negative pressure treatment apparatus according to claim 3, wherein the suction amount measuring means is a Coriolis flow meter.   The negative pressure treatment device according to claim 1 or 2, wherein the suction amount measuring means is a liquid level gauge provided in a discharge container connected to the suction tube via a discharge flow path. .   The negative pressure treatment apparatus according to claim 5, wherein the suction amount measuring means is a capacitance type liquid level gauge. A delivery pump for delivering the fluid supplied through the supply channel through a delivery tube into a closed space formed by covering the wound portion with a covering sheet; and a suction tube from the closed space while maintaining the closed space in a negative pressure state A method for controlling a negative pressure treatment device comprising a suction pump for sucking fluid,
A suction amount measuring step for measuring a suction amount of the fluid sucked through the suction tube;
A calculation step for calculating a difference between the suction amount measured by the suction amount measurement step and the delivery amount of the fluid delivered by the delivery pump;
A display step for displaying the calculated value calculated by the calculation step;
A negative pressure treatment device control method comprising:   The method for controlling a negative pressure therapy apparatus according to claim 7, further comprising a control step of controlling the delivery pump according to the calculated value calculated in the calculating step.

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