JP6244143B2 - Negative pressure therapy device - Google Patents

Description

  The present invention relates to a negative pressure treatment device that treats a wound part while holding the negative pressure.

  Conventionally, various devices for treating wounds have been developed. For example, there is a negative pressure treatment device that treats a wound part with negative pressure (see Patent Document 1 below). As shown in FIG. 5, the negative pressure treatment device 100 includes a covering material 14 that covers the wound portion 12 to form a closed portion 38, a suction channel T <b> 3 for discharging the waste liquid 22 from the closed portion 38, and a suction channel. T3 includes a suction means 26 for sucking the waste liquid 22, a storage container 28 for storing the waste liquid 22, and two pressure measuring means PSb and PSc. The waste liquid 22 includes waste products and exudates generated from the wound part 12.

  A suction tube T3 uses a flexible tube. The pressure measuring means PSb and PSc are connected to the vicinity of the covering material 14 and the suction means 26 in the suction flow path T3. The connection is made via measurement paths T2 ′ and T3 ′ made of a flexible tube similar to the suction channel T3. The pressure measuring means PSb measures the pressure of the blocking portion 38, and the pressure measuring means PSc measures the pressure of the suction means 26. Although the pressure of the blocking part 38 becomes negative due to the suction force of the suction means 26, the suction force is adjusted so that the blocking part 38 has a desired negative pressure value using the pressure value measured by the pressure measuring means PSb. Control.

  When clogging occurs in the suction flow path T3 due to waste materials in the waste liquid 22, the application of negative pressure to the blocking portion 38 is hindered and the desired treatment cannot be performed. If clogging occurs in the measurement path T2 ′, the pressure of the blocking portion 38 cannot be measured accurately, and the suction force of the suction means 26 cannot be controlled.

  In Cited Document 1, in order to check whether clogging occurs between the closed portion 38 and the container 28 in the suction flow path T3, the change directly corresponding to the pressure measurement means PSb by driving the suction means 26. Check if this occurs. When clogging has occurred, in order to remove the clogging and continue the desired treatment, the pressure difference is obtained from the pressure values of the two pressure measuring means PSb and PSc, and the pressure difference becomes the “first maximum differential pressure”. The suction means 26 is driven until it reaches. When clogging does not occur and the pressure value of the blocking portion 38 does not reach the desired negative pressure value, the suction unit 26 is driven until the pressure difference reaches the “second maximum differential pressure”.

  By providing the “first maximum differential pressure”, when the clogging is eliminated, the inside of the closed portion 38 suddenly becomes a negative pressure, and the wound portion 12 is prevented from being damaged. Further, by providing the “second maximum differential pressure”, the pressure loss due to the waste liquid 22 in the suction flow path T3 due to the height difference between the closed portion 38 and the storage container 28 is eliminated. In Cited Document 1, the “second maximum differential pressure” is set assuming a height difference in advance. However, if a height difference between the closed portion 38 and the storage container 28 can be detected, a more optimal maximum differential pressure is set. And safe treatment can be performed.

  Further, as shown in Patent Document 2 below, there is also a negative pressure treatment apparatus 100 ′ that improves the negative pressure treatment apparatus 100 of the cited reference 1 and supplies a liquid for cleaning and treatment to the wound part 12 (FIG. 6). The negative pressure treatment apparatus 100 ′ supplies the liquid supply container 18 storing the liquid 16 for cleaning and treating the wound part 12 and the supply for supplying the liquid 16 to the occlusion part 38 with respect to the negative pressure treatment apparatus 100. A flow path T1 is added. The supply channel T1 is a tube similar to the suction channel T3. Similarly to the suction flow path T3 and the like, the supply flow path T1 may be clogged due to bending. In Cited Document 2, the pressure measuring means PSb and PSc are provided with any one of the pressure measuring means PSb and PSc. However, the negative pressure treatment device 100 ′ shown in FIG. The structure provided is shown.

  In the configuration of FIG. 6, when clogging is detected by the same method as in the cited document 1, even if clogging occurs in the supply flow path T1, the pressure values of the pressure measuring means PSb and PSc are the same as when there is no clogging. . Therefore, clogging of the supply flow path T1 cannot be detected, and desired treatment cannot be performed. The negative pressure treatment apparatus 100 ′ cannot cope with a case where the supply flow path T1 is clogged.

  When clogging occurs, it is often impossible to determine which position is clogged by appearance. In order to respond quickly, it is necessary to identify which position is clogged. Depending on the location where clogging occurs, the pressure of the blocking portion 38 cannot be measured accurately, so the suction force of the suction means 26 may become excessive and damage the wound portion 12.

  Further, even when there is no clogging, when the blocking portion 38 moves up and down due to the movement of the patient, the suction channel T3 is not completely filled with the waste liquid 22, so the blocking portion is caused by the movement of the waste liquid 22 in the suction channel T3. 38 pressure fluctuates. If the suction means 26 is controlled in response to fluctuations excessively, the pressure in the blocking portion 38 may become excessive negative pressure, which is not preferable for treatment. It is preferable that the movement of the blocking portion 38 can be detected.

Japanese Patent No. 4671249 (FIG. 1) Japanese Patent No. 4990759 (FIG. 11a)

  An object of the present invention is to provide a negative pressure treatment apparatus capable of detecting clogging generated in each flow path by appropriately measuring pressure even in a negative pressure treatment apparatus having a supply flow path. There is.

  In addition, in a negative pressure treatment apparatus equipped with a supply flow path, even when the occlusion portion moves up and down due to the movement of the patient, a safer treatment can be performed by controlling the pressure value of the occlusion portion to a desired negative pressure value. An object of the present invention is to provide a negative pressure treatment device capable of performing the above-described problem.

  Furthermore, in a negative pressure treatment apparatus equipped with a supply flow path, even when clogging occurs in the suction flow path, the maximum suction pressure by the suction means for eliminating the clogging is appropriately set to perform safer treatment. An object of the present invention is to provide a negative pressure treatment device capable of performing the above-described problem.

  The negative pressure treatment device of the present invention covers a wound part to form a closed part, a liquid supply container that stores liquid, a supply channel for supplying liquid to the closed part, and discharges waste liquid from the closed part. Suction passage, suction means for sucking waste liquid, storage container for storing waste liquid in the middle of the suction flow path, first pressure measuring means connected to the supply flow path, and second pressure for measuring the pressure in the closed portion At least one of the measurement means or the third pressure measurement means for measuring the pressure of the container is provided.

  The present invention uses the pressure value of the first pressure measuring means and the pressure value of the other pressure measuring means to detect clogging that has occurred in at least one of the supply flow path and the suction flow path.

  Further, the negative pressure treatment device of the present invention includes a covering material that covers the wound portion to form a closed portion, a liquid supply container that stores liquid, a supply channel for supplying liquid to the closed portion, and discharges waste liquid from the closed portion. A suction channel for suctioning, a suction unit for sucking waste liquid, a storage container for storing the waste liquid in the middle of the suction channel, a first pressure measuring unit connected to the supply channel, and a second for measuring the pressure in the closed portion Pressure measuring means is provided.

  The position at which the first pressure measuring means is connected to the supply channel is in a fixed positional relationship with at least one of the liquid supply container, the suction means, and the storage container, and the pressure value of the first pressure measuring means and the second pressure measuring means The first pressure measuring means detects the height between the position where the first pressure measuring means is connected to the supply flow path and the closing portion.

  The present invention can detect clogging generated in the supply flow path, the suction flow path, the connection path, or the measurement path by using the pressure value measured by each pressure measuring means.

  Further, by using the pressure difference between the pressure value of the first pressure measuring means and the pressure value of the second pressure measuring means, the height difference between the position where the first pressure measuring means is connected to the supply flow path and the closed portion is detected. can do. Furthermore, it is possible to limit the suction force by the suction means from the detected height difference, and to prevent the bad influence on the wound part that can occur when clogging is eliminated.

  Further, by detecting the vertical movement of the occluded part, it is possible to prevent the suction force from fluctuating excessively, and it is difficult to adversely affect the wound part.

It is a figure which shows the structure of the negative pressure treatment apparatus of this invention. It is an enlarged view of the circumference | surroundings of a coating | covering material, (a) is a figure which used the connection component, (b) is a figure which does not use the connection component. It is a figure which shows the structure of the negative pressure treatment apparatus of another embodiment of this invention. It is a figure which shows the structure of the negative pressure treatment apparatus of another embodiment of this invention. It is a figure which shows the structure of the conventional negative pressure treatment apparatus. It is a figure which shows the structure of the conventional negative pressure treatment apparatus which supplies a liquid to a wound part.

  The negative pressure treatment apparatus of the present invention will be described with reference to the drawings.

  The negative pressure treatment device 10 of the present invention shown in FIG. 1 is for covering the wound portion 12 with the covering material 14 that forms the closed portion 38, the liquid supply container 18 storing the liquid 16, and supplying the liquid 16 to the closed portion 38. Supply flow path T1, suction flow path T3 for discharging the waste liquid 22 from the closed portion 38, suction means 26 for sucking the waste liquid 22 into the suction flow path T3, storage container 28 for storing the waste liquid 22, supply flow path First pressure measuring means PSa connected to T1, second pressure measuring means PSb for measuring the pressure of the closed portion 38, and third pressure measuring means PSc for measuring the pressure of the container 28 are provided.

  As shown in FIG. 2, the covering material 14 has a larger area than the wound part 12, and the periphery of the covering material 14 is brought into close contact with the skin 34, so that the space covered with the covering material 14 blocks the blocking part 38. Form. The dressing 14 is a flexible film such as a polymer film having an adhesive layer on the wound side. Rather than covering the wound part 12 directly with the covering material 14, a flexible porous member 36 such as a sponge is disposed on the wound part 12 before covering the wound part 12 with the covering material 14.

  The suction means 26 is a pump, and controls the inside of the closed portion 38 to a desired negative pressure value by suction by the suction means 26. You may provide the air release valve which is not shown in figure. The negative pressure value in the closed portion 38 can also be controlled by opening and closing the air release valve, and more stable control is possible. By making the inside of the obstruction | occlusion part 38 into a negative pressure, a waste material and an exudate are discharged | emitted from the wound part 12. FIG. Moreover, the blood flow of the wound part 12 and its circumference is increased, granulation formation is promoted, the wound part healing function is recovered, and the treatment of the wound part 12 is accelerated.

  The liquid 16 stored in the liquid supply container 18 is a liquid for cleaning and / or treating the wound part 12. For example, physiological saline can be used. The liquid supply container 18 is preferably a resin container that can be deformed by reducing the fluid. The liquid 16 can be supplied to the supply channel T1 by a metering pump (not shown) or the like. Further, since the closed portion 38 has a negative pressure, the liquid 16 can be supplied to the closed portion 38 by providing a flow rate adjusting means on the supply flow path T1.

  The supply flow path T1 is a tube that communicates from the liquid supply container 18 to the closing portion 38. The liquid 16 is supplied to the closing portion 38 through the supply channel T1. The supply channel T1 is preferably a flexible tube so that it can be adapted to the movement of the patient.

  The suction channel T <b> 3 is a tube that communicates from the blocking portion 38 to the suction means 26. As with the supply flow path T1, the suction flow path T3 is preferably composed of a flexible tube. Waste and exudate produced from the wound part 12 are discharged from the obstruction part 38 to the suction flow path T3 as waste liquid 22 by the suction force of the suction means 26 together with the liquid 16 supplied to the obstruction part 38.

  A storage container 28 for storing the waste liquid 22 is provided in the middle of the suction channel T3. The tube of the suction channel T3 is divided into two, and each tube is connected to the storage container. The waste liquid 22 sucked into the suction channel T3 is stored in the storage container 28 so that it cannot reach the suction means 26.

  The suction means 26 may be protected from being damaged by the waste liquid 22. For example, a sensor for detecting the amount of the waste liquid 22 in the container 28 is appropriately provided. When the amount reaches a predetermined amount, it is displayed on a monitor or an alarm sound is emitted from an alarm device to instruct replacement of the storage container 28 or the like.

  Further, a waste liquid 22 may be detected by attaching a liquid detection sensor or the like between the storage container 28 and the suction means 26 in the suction flow path T3. When the waste liquid 22 is detected, the suction means 26 is stopped before the waste liquid 22 reaches the suction means 26 and is displayed on a monitor or an alarm sound is generated by an alarm device. A non-permeable filter may be attached in place of the liquid detection sensor so that the waste liquid 22 cannot reach the suction means 26. Therefore, there is no waste liquid 22 between the storage container 28 and the suction means 26 in the suction flow path T3, and clogging in the suction flow path T3 occurs between the closed portion 38 and the storage container 28.

  The first pressure measuring means PSa, the second pressure measuring means PSb, and the third pressure measuring means PSc are pressure sensors. The first pressure measuring means PSa is connected to the supply channel T1 via the measurement path T1 ′ and measures the pressure in the supply channel T1. The second pressure measuring means PSb is connected to the covering material 14 via the measurement path T2 ′ and measures the pressure of the closing portion 38. The third pressure measuring means PSc is connected to the storage container 28 via the measurement path T3 ′ and measures the pressure of the storage container 28.

  For the measurement paths T1 ′, T2 ′, T3 ′, the same tubes as the supply flow path T1 and the suction flow path T3 may be used. When measuring the pressure, the actual measurement value may be corrected in consideration of the measurement paths T1 ′, T2 ′, and T3 ′.

  A method of connecting the supply flow path T1, the suction flow path T3, and the measurement path T2 ′ to the blocking portion 38 will be described with reference to FIG. As shown in FIG. 2A, a supply flow path T1, a suction flow path T3, and a measurement path T2 ′ (not shown) are attached to the connection component 40 in advance. A hole 42 is formed in the covering material 14, and the pad 44 of the connection component 40 is attached on the covering material 14 at the periphery of the hole 42. The connecting part 40 forms a path 46 that communicates with the inside and outside of the closed part 38. By connecting the flow paths T1 and T3 and the measurement path T2 ′ to each connected part 40, the liquid 16 is supplied to the closed part 38. The waste liquid 22 is discharged from the closed portion 38 and the pressure in the closed portion 38 can be measured. By using the connection component 40, the peripheral edge of the covering material 14 can be easily adhered to the skin 34, and the formation of the blocking portion 38 is easy. The covering material 14 and the connection component 40 may be integrated. The shape of the connection component 40 may be changed as appropriate.

  Further, as shown in FIG. 2B, the flow paths T1 and T3 and the path T2 ′ (not shown) may be passed between the covering material 14 and the skin 34 at the periphery of the covering material 14. The connection component 40 is not used and the configuration is simple. A hole may be formed at an arbitrary position of the covering material 14, and the flow paths T1, T3 and the path T2 ′ may be passed through the hole. A part such as a manifold may be used to pass through each of the flow paths T1 and T3 and the measurement path T2 ′ from one hole of the covering material 14.

  The pressure measuring means PSb for measuring the pressure of the blocking portion 38 is not limited to being directly connected to the covering material 14 via the measurement path T2 ′ as long as the pressure of the blocking portion 38 can be measured. The supply channel T1 or the suction channel T3 may be connected to the vicinity of the covering material 14 via a connection path T2 ′. For example, the connection path T2 ′ is connected to a position within about 20 cm from the covering material 14. If the position where the connection path T2 ′ is connected to the supply flow path T1 or the suction flow path T3 and the height of the closed portion 38 are substantially the same height, the pressure of the closed portion 38 can be measured.

  When the second pressure measuring means PSb is provided as in the present embodiment, the first pressure measuring means PSa is located at a position as far as possible from the closing portion 38 of the supply flow path T1. It is preferable to be connected via The range in which clogging in the supply path T1 can be detected is only on the closed portion 38 side from the position where the first pressure measuring means PSa is connected to the supply path T1, as described later.

  The negative pressure treatment device 10 includes a control means 48. The pressure values measured by the pressure measuring means PSa, PSb, and PSc are input to the control means 48, and a signal for controlling the suction means 26 is output from the control means 48. The pressure value input to the control means 48 is used to control the suction force of the suction means 26 in order to set the blocking portion 38 to a desired negative pressure value. Although there are a plurality of pressure measuring means PSa, PSb, PSc, at least one pressure value may be used. It is preferable to control using the pressure value of the second pressure measuring means PSb that directly measures the pressure of the blocking portion 38.

  Control by the control means 48 is as follows. Using the desired negative pressure value as a set value, the suction force of the suction means 26 is controlled so that the pressure value in the blocking portion 38 becomes the set value. If the pressure value in the blocking portion 38 is a positive pressure than the set value, the suction force of the suction means 26 is increased according to the deviation from the set value, and when the set value is reached, the suction by the suction means 26 is stopped. Further, when the suction means 26 is stopped and the negative pressure is still higher than the set value, an air release valve (not shown) may be controlled so that the air is taken into the closed portion 38.

  When the pressure value of the blocking portion 38 reaches the set value, the suction unit 26 maintains the stopped state. After that, the liquid 16 is supplied from the leakage in the blocking portion 38 or the supply flow path T1, so that the pressure values of the first pressure measuring means PSa and the second pressure measuring means PSb gradually increase, and the suction means 26 When the pressure value of the second pressure measuring means PSb used for the control deviates from the set value by a certain value or more, the suction means 26 is driven to maintain the closed portion 38 at the set value.

  Further, the control means 48 detects (determines) clogging as follows from the input pressure value of each pressure measuring means in the control state. When the supply flow path T1 is clogged, the liquid 16 is supplied to the supply flow path T1, so that only the pressure value of the first pressure measuring means PSa rapidly increases. Thereby, the clogging which generate | occur | produced in supply channel T1 is detectable. However, the range between the position where the first pressure measuring means PSa is connected to the supply flow path T1 and the closed portion is detectable. Normally, since the liquid 16 flows through the supply channel T1, no clogging occurs in the supply channel T1. Clogging occurs in the supply flow path T1 because the patient's movement causes the supply flow path T1 to bend in the vicinity of the closed portion 38 to close the supply flow channel T1, or the distal end of the supply flow channel T1 is closed to the negative pressure. In most cases, the material is crushed or blocked by the porous member 36.

  Depending on the movement of the patient, the pressure value of the first pressure measuring means PSa may increase rapidly. However, in that case, if the movement of the patient stops, the increase in the pressure value of the first pressure measuring means PSa also stops. When the supply channel T1 is clogged, the pressure value of the first pressure measuring means PSa continuously increases, so that it can be distinguished from patient movement. The control means 48 sets a threshold value for the rise time of the pressure value, and determines that the supply flow path T1 is clogged when the pressure value rises continuously for a certain time or more.

  Similarly, when clogging occurs in the measurement path T2 ′, the pressure value of the first pressure measurement unit PSa gradually increases, but the pressure value of the second pressure measurement unit PSb does not increase. When the pressure value of the first pressure measuring unit PSa gradually increases and the pressure value of the second pressure measuring unit PSb does not increase, that is, the control unit 48 determines the pressure value of the first pressure measuring unit Psa and the second pressure measurement. When the pressure difference of the means Psb gradually increases, it is determined that clogging has occurred in the measurement path T2 ′. Clogging occurs in the measurement path T2 ′ because the end of the measurement path T2 ′ is crushed by the closed portion 38 becoming negative pressure, or the front end of the measurement path T2 ′ is blocked by the porous member 36. This is the case, for example.

  Similarly, when clogging occurs in the suction flow path T3, the pressure value of the second pressure measurement means PSb used for controlling the suction means 26 gradually increases, and reaches a constant value from the desired negative pressure value. In the case of the deviation, the pressure value of the second pressure measuring means PSb does not change even if the suction means 26 is driven. When the pressure of the second pressure measuring means PSb deviates from a desired negative pressure value by a certain value or more and the suction means 26 is driven after that, the control means 48 does not change the pressure value of the second pressure measuring means Psb. Then, it is determined that the suction channel T3 is clogged.

  In the first embodiment, the configuration using the three pressure measuring means PSa, PSb, and PSc is shown. However, when the clogging is detected by the above method, the third pressure measuring means PSc may not be provided. By omitting the third pressure measuring means PSc, the apparatus configuration can be simplified.

  As described above, the present invention can detect clogging of the supply flow path T1 that could not be detected conventionally. A clogging that could not be detected in the past can be detected, and even if the clogging cannot be performed in a desired negative pressure treatment in the past, the clogging can be quickly eliminated and the desired negative pressure treatment can be continued. It is also possible to specify the position where clogging has occurred.

  Clogging can be detected even with a configuration including only the first pressure measuring means PSa and the third pressure measuring means PSc. In this configuration, the first pressure measuring means PSa is connected to the supply flow path T1 via the measurement path T1 ′ in the vicinity of the closing portion 38, and the pressure of the closing portion 38 is measured by the first pressure measuring means PSa. It is preferable to control the suction force of the suction means 26 using the pressure value of the one pressure measuring means PSa. In this case, the clogging of each of the flow paths T1 and T3 can be detected using the two pressure measuring means PSa and PSc as in the first embodiment. Although there is no problem even if the second pressure measuring means PSb is provided, the apparatus configuration can be simplified by omitting the second pressure measuring means PSb from the negative pressure treatment apparatus 10. Since there is no second pressure measuring means PSb, the measurement path T2 ′ can be omitted, and the number of tubes connected to the closing portion 38 can be reduced.

  As shown in the first and second embodiments, clogging can be detected even if one of the second pressure measuring means PSb and the third pressure measuring means PSc is omitted. Further, a monitor or an alarm device may be connected to the control means 48 so that when clogging is detected, the occurrence of clogging and the clogged location may be notified.

  In the first and second embodiments, the method for detecting clogging when the pressure of the blocking portion 38 is controlled to a desired negative pressure value has been described. However, each pressure measuring means when the suction means 26 is driven is described. Clogging can also be detected by the presence or absence of changes in pressure values measured by PSa, PSb, and PSc.

  In the configuration of the first embodiment, when no clogging occurs, when the suction unit 26 is driven, the pressure values of the pressure measuring units PSa, PSb, and PSc change. However, when the supply channel T1 is clogged, only the pressure value of the first pressure measuring means PSa does not change. When clogging occurs in the measurement path T2 ′, only the pressure value of the second pressure measuring means PSb does not change. When clogging occurs in the suction flow path T3, both the pressure values of the first pressure measuring means PSa and the second pressure measuring means PSb do not change. The control means 48 determines that clogging has occurred when there is no change in the pressure value of any pressure measuring means when the suction means 26 is driven. Also in this case, the third pressure measuring means Psc may not be provided. In the configuration of the second embodiment, clogging can be detected in the same manner.

  When the suction means 26 is driven in a normal control state, the presence or absence of clogging may be detected using the above method. Alternatively, the suction means 26 may be intentionally driven at the start of treatment or during the treatment to check for clogging. It is not necessary to include all of the first pressure measuring means PSa, the second pressure measuring means PSb, and the third pressure measuring means PSc.

  As in the negative pressure treatment device 50 shown in FIG. 3, the first pressure measurement means PSa is connected to the supply flow path T1 via the measurement path T1 ′ at a position away from the blocking portion 38. In order to supply the liquid 16 in the liquid supply container 18 to the closing portion 38, the supply flow path T <b> 1 is filled with the liquid 16. For this reason, using the pressure difference between the pressure value of the first pressure measuring means PSa and the pressure value of the second pressure measuring means PSb, the position (supply flow path) where the first pressure measuring means PSa is connected to the supply flow path T1. The height difference h between the position of T1 and the measurement path T1 ′) and the position of the blocking portion 38 can be detected.

  Usually, the suction means 26 is housed inside the casing of the treatment unit, and the liquid supply container 18 and the storage container 28 are installed in a fixed positional relationship with the treatment unit. The position where the first pressure measuring means PSa is connected to the supply flow path T1 (via the measurement path T1 ′) is fixed in a fixed positional relationship with at least one of the liquid supply container 18, the suction means 26 and the storage container 28. If it is, it becomes possible to grasp the positional relationship (height difference h) in the height direction between the occlusion portion 38 and the treatment unit.

  The position where the first pressure measuring means PSa is connected to the supply channel T1 is preferably the same height as the treatment unit. In this case, if the treatment unit is set to the same height as the blocking portion 38, the pressure difference between the pressure value of the first pressure measuring means PSa and the pressure value of the second pressure measuring means PSb is eliminated. When the treatment unit is arranged above or below the blocking portion 38, a pressure difference between the pressure value of the first pressure measuring means PSa and the pressure value of the second pressure measuring means PSb occurs. As the closing portion 38 moves up and down, the pressure value of the first pressure measuring means PSa connected to the supply flow path T1 changes, and the differential pressure between the pressure values measured by both the pressure measuring means PSa and PSb changes. The control means 48 determines that the closing portion 38 has moved up and down due to this differential pressure fluctuation.

  On the other hand, although the waste liquid 22 is discharged | emitted in the suction flow path T3, not only the waste liquid 22 but gas (air) is also contained. This gas (air) is taken in through the leak portion of the closing portion 38 or taken in from an air release valve (not shown). For this reason, the height of the occlusion part 38 and the treatment unit is determined from the pressure difference between the pressure value of the occlusion part 38 (pressure value of the second pressure measurement means) and the pressure value of the storage container 28 (pressure value of the third pressure measurement means). It is not possible to detect the positional relationship (height difference h) in the direction and the vertical movement of the closed portion 38.

  When the closing part 38 moves up and down, the pressure of the closing part 38 frequently changes due to the movement of the waste liquid 22 in the suction flow path T3. If the vertical movement of the blocking portion 38 can be detected, in that case, the suction force of the suction means 26 is not changed frequently by performing control using an average value of pressure values per unit time. Also good. Further, even when the suction channel T3 is looped in the vertical direction (height direction), the pressure of the blocking portion 38 greatly fluctuates when the waste liquid 22 gets over the loop. In that case, the same control may be performed.

  In addition, the further effect can also be acquired by combining the position detection of the height direction of the obstruction | occlusion part 38 and a treatment unit, and clogging detection as shown in Example 1. FIG. The negative pressure treatment device 60 shown in FIG. 4 further includes third pressure measurement means PSc that measures the pressure in the storage container 28. When the clogging detection as shown in the first embodiment detects clogging of the suction flow path T3, the control means 48 uses the detected height difference h to perform suction to eliminate clogging by the suction force of the suction means 26. The maximum pressure value (maximum negative pressure value) of the possible storage container 28 is calculated.

  When the clogging of the suction channel T3 is eliminated by increasing the suction force of the suction means 26 and increasing the pressure value of the storage container 28 in the negative pressure direction, the clogging is eliminated and at the same time the pressure value of the closed portion 38 is rapidly increased. Excessive negative pressure. For this reason, the wound part 12 may be damaged. In order to avoid this, the maximum pressure value (maximum negative pressure value) that can be applied to the container 28 by the suction force of the suction means 26 may be determined from the detected height difference h. That is, the control means 48 can set in advance a pressure value that can be further added to the desired negative pressure value of the closed portion 38 and can give the accommodation container 28 a value that takes into account the detected height difference h. Determined as the maximum pressure value (maximum negative pressure value). Thereby, when the clogging of the suction channel T3 is eliminated, the wound part 12 is not damaged and safe treatment can be performed. A negative pressure value that does not damage the wound part 12 may be set in advance, and the maximum pressure value (maximum negative pressure value) that can be applied to the storage container 28 may be determined in consideration of the height difference h.

  If the maximum pressure value (maximum negative pressure value) is reached before the clogging of the suction channel T3 is eliminated, the suction by the suction means 26 is stopped without further increasing the suction force. Furthermore, a monitor or an alarm device may be connected to the control means 48 to notify that the maximum pressure has been reached and clogging has not been eliminated.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Although various embodiments have been described, the embodiments are not independent or exclusive, and may be implemented in appropriate combinations.

10, 50, 60: Negative pressure treatment device 12: Wound part 14: Dressing material 16: Liquid 18: Liquid supply container 22: Waste liquid 26: Suction means 28: Container 34: Skin 36: Porous member 38: Occlusion part 40 : Connection part 42: Hole 44 provided in covering material: Connection part pad 46: Path leading to inside and outside T 1: Supply flow path T 3: Suction flow path T 1 ′, T 3 ′: Measurement path T 2 ′: Measurement path (connection Route)
PSa, PSb, PSc: Pressure measuring means h: Height difference

Claims (9)

A covering material that covers the wound and forms an obstruction;
A liquid supply container storing a liquid for performing at least one of cleaning or treatment of the wound part;
A supply flow path for supplying liquid from the liquid supply container into the closed portion;
A suction flow path through which waste liquid is discharged from the closed portion;
Suction means for sucking waste liquid into the suction channel;
A storage container that is disposed in the middle of the suction flow path and stores waste liquid;
First pressure measuring means connected to the supply flow path;
Second pressure measuring means for measuring the pressure of the blocking portion ;
A connection path for connecting to a supply flow path or a suction flow path provided in the second pressure measuring means, or a measurement path for directly connecting to a closed portion;
With
When the pressure of the blocking portion is controlled to a desired negative pressure value, the supply flow is changed by using the fluctuation of the pressure difference between the pressure value of the first pressure measuring means and the pressure value of the second pressure measuring means. A negative pressure treatment device for detecting clogging occurring in at least one of a path, a suction flow path, a connection path, and a measurement path. A covering material that covers the wound and forms an obstruction;
A liquid supply container storing a liquid for performing at least one of cleaning or treatment of the wound part;
A supply flow path for supplying liquid from the liquid supply container into the closed portion;
A suction flow path through which waste liquid is discharged from the closed portion;
Suction means for sucking waste liquid into the suction channel;
A storage container that is disposed in the middle of the suction flow path and stores waste liquid;
First pressure measuring means connected to the supply flow path;
Second pressure measuring means for measuring the pressure of the blocking portion ;
With
Using the pressure value of the first pressure measuring means and the pressure value of the other pressure measuring means to detect clogging occurring in at least one of the supply flow path and the suction flow path;
The second pressure measuring means includes either a connection path for connecting to the supply flow path or the suction flow path, or a measurement path for directly connecting the second pressure measurement means to the blocking portion,
When driving the suction means,
A negative pressure treatment device that detects at least one clogging of a supply flow path, a suction flow path, a connection path, and a measurement path from a fluctuation state of a pressure value of each of the pressure measuring means. 3. The negative pressure treatment apparatus according to claim 2, wherein the clogging generated in the connection path or the measurement path is detected using the pressure value of the second pressure measurement means and the pressure value of the other pressure measurement means. The position where the first pressure measuring means is connected to the supply flow path is in a fixed positional relationship with at least one of the liquid supply container, the suction means and the storage container;
Using the pressure difference between the pressure value of the first pressure measuring means and the pressure value of the second pressure measuring means, the height difference between the position where the first pressure measuring means is connected to the supply flow path and the position of the blocking portion is determined. The negative pressure treatment device according to any one of claims 1 to 3 to be detected. The negative pressure treatment apparatus according to claim 4, wherein the suction force of the suction means is adjusted when the detected height difference fluctuates. A covering material that covers the wound and forms an obstruction;
A liquid supply container storing a liquid for performing at least one of cleaning or treatment of the wound part;
A supply flow path for supplying liquid from the liquid supply container into the closed portion;
A suction flow path through which waste liquid is discharged from the closed portion;
Suction means for sucking waste liquid into the suction channel;
A storage container that is disposed in the middle of the suction flow path and stores waste liquid;
Supply channel pressure measuring means connected to the supply channel ;
A container pressure measuring means for measuring the pressure of the container ;
With
The first pressure measuring means measures the pressure of the blocking portion;
When the pressure of the closed portion is controlled to a desired negative pressure value, supply is performed using a variation in the pressure difference between the pressure value of the supply flow path pressure measuring means and the pressure value of the containing container pressure measuring means. A negative pressure treatment device that detects clogging in a flow path or a suction flow path. A first pressure measuring means, a second pressure measuring means and a third pressure measuring means for measuring the pressure of the containing container ;
With
Using the detected height difference, calculate the maximum pressure value of the storage container that can be sucked to eliminate clogging by the suction force of the suction means,
When it is detected that the suction channel is clogged,
6. The negative pressure treatment according to claim 4, wherein the suction means is driven until it is detected that the clogging of the suction flow path has been eliminated or the pressure value of the third pressure measuring means reaches the maximum pressure value. apparatus. A covering material that covers the wound and forms an obstruction;
A liquid supply container storing a liquid for performing at least one of cleaning or treatment of the wound part;
A supply flow path for supplying liquid from the liquid supply container into the closed portion;
A suction flow path through which waste liquid is discharged from the closed portion;
Suction means for sucking waste liquid into the suction channel;
A storage container that is disposed in the middle of the suction flow path and stores waste liquid;
First pressure measuring means connected to the supply flow path;
Second pressure measuring means for measuring the pressure of the blocking portion;
With
The position where the first pressure measuring means is connected to the supply flow path is in a fixed positional relationship with at least one of the liquid supply container, the suction means and the storage container,
Using the pressure difference between the pressure value of the first pressure measuring means and the pressure value of the second pressure measuring means, the height difference between the position where the first pressure measuring means is connected to the supply flow path and the position of the blocking portion is determined. Negative pressure treatment device to detect. The negative pressure treatment apparatus according to claim 8, wherein the suction force of the suction means is adjusted when the detected height difference fluctuates.

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