JP6982850B2

JP6982850B2 - Drainage treatment system

Info

Publication number: JP6982850B2
Application number: JP2017150699A
Authority: JP
Inventors: 洋横井; 聡一勝田
Original assignee: Senko Medical Instrument Manufacturing Co Ltd
Current assignee: Senko Medical Instrument Manufacturing Co Ltd
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2021-12-17
Anticipated expiration: 2037-08-03
Also published as: JP2019025230A

Description

本発明は、患者から排出された体液等の排液を貯留する排液バッグを備えた排液処理システムに関する。 The present invention relates to a drainage treatment system including a drainage bag for storing drainage such as body fluid drained from a patient.

例えば、心臓や消化器系の手術後において、患者の各種器官に留置したドレーンチューブを硬質な素材で構成された排液バッグに接続し、患部に溜まった血液等の体液を排液バックに貯留する処置が施されることがある。また、胸部外科手術後においては、胸腔内に留置したドレーンチューブと吸引ポンプとを排液バッグにそれぞれ接続して患者の胸腔に溜まった血液等の体液を吸引する処置が施される。 For example, after surgery on the heart or digestive system, drain tubes placed in various organs of the patient are connected to a drainage bag made of a hard material, and body fluids such as blood collected in the affected area are stored in the drainage bag. May be treated. In addition, after thoracic surgery, a drain tube placed in the thoracic cavity and a suction pump are connected to each of the drainage bags to suck body fluid such as blood accumulated in the thoracic cavity of the patient.

このような排液バッグには、患者から排出された体液である排液を貯留する排液槽が設けられており、排液槽に貯留された排液の状態を目視で確認できるように、排液バッグは透明な素材で構成されている。そして、排液槽には目盛りが記載されていて貯留された排液の量を把握することができる。 Such a drainage bag is provided with a drainage tank for storing drainage, which is a body fluid discharged from the patient, so that the state of the drainage stored in the drainage tank can be visually confirmed. The drainage bag is made of a transparent material. Then, a scale is written on the drainage tank so that the amount of drainage stored can be grasped.

従来の排液バッグの場合、観察時点で排液槽に貯留された排液の量を目視で確認できるにすぎない。このため、その量の時間的変化を把握するために排液槽に貯留された排液の液面位置に観察者が日時を書き込んで対処することが多かった。この時間的変化を自動的に記録するため、排液槽にレベルセンサを設けて液面レベルを測定し、その測定結果を逐次記憶する処理をコンピュータに実施させることが考えられる。しかし、レベルセンサは比較的高価であるし、液面に泡が溜まっている場合にはレベルセンサの測定精度が悪化するおそれがある。また、排液が貯留された排液バッグの重量を重量センサによって測定し、その測定結果を逐次記憶する処理をコンピュータに実施させることも考えられる。しかし、排液バッグにはドレーンチューブや吸引ポンプ等が接続されるので、これらの荷重の影響を受けて測定精度が悪化するおそれがある。 In the case of a conventional drainage bag, the amount of drainage stored in the drainage tank at the time of observation can only be visually confirmed. For this reason, in many cases, the observer writes the date and time on the liquid level position of the drainage stored in the drainage tank in order to grasp the change in the amount over time. In order to automatically record this change over time, it is conceivable to provide a level sensor in the drainage tank to measure the liquid level and have the computer perform a process of sequentially storing the measurement results. However, the level sensor is relatively expensive, and if bubbles are accumulated on the liquid surface, the measurement accuracy of the level sensor may deteriorate. It is also conceivable to have a computer perform a process of measuring the weight of the drainage bag in which the drainage is stored by a weight sensor and sequentially storing the measurement results. However, since a drain tube, a suction pump, or the like is connected to the drainage bag, the measurement accuracy may deteriorate due to the influence of these loads.

そこで、本発明は、排液バッグの排液槽に貯留された排液の液面のレベルや排液バッグの重量を計測することなく、排液槽に貯留された排液の量の時間的変化を記録することを容易に実現できる排液処理システムを提供することを目的とする。 Therefore, in the present invention, the amount of drainage stored in the drainage tank is temporal without measuring the level of the liquid level of the drainage stored in the drainage tank of the drainage bag or the weight of the drainage bag. It is an object of the present invention to provide a drainage treatment system that can easily realize the recording of changes.

本発明の排液処理システムは、患者から排出された排液（Ｌｄ）が貯留される排液槽（７、２２、３２、４２）を有し、前記排液槽が底部（８、２４、３５、４３）及び天井部（９、２５、３６、４４）にて閉じられた排液バッグ（３、２１、３１、４１）を備えた排液処理システム（１Ａ、１Ｂ、１Ｃ、１Ｄ）において、前記排液バッグは、前記排液槽を第１空間（７Ａ、２２Ａ、３２Ａ、４２Ａ）と第２空間（７Ｂ、２２Ｂ、３２Ｂ、４２Ｂ）とに区画するように前記天井部から前記底部付近まで上下方向に延びることにより、前記底部付近にて前記第１空間と前記第２空間とを連通させる区画壁（１０、２６、３７、４５）と、前記排液が流入し前記第１空間に連通する排液ポート（１３、２８、３９、４７）とを更に有し、前記第１空間内の圧力と前記第２空間内の圧力との圧力差に基づいて、前記排液槽に貯留された前記排液の量を算出する算出手段（５）を更に備えるものである。 The effluent treatment system of the present invention has a effluent tank (7, 22, 32, 42) in which the effluent (Ld) discharged from the patient is stored, and the effluent tank is at the bottom (8, 24, In a drainage treatment system (1A, 1B, 1C, 1D) equipped with a drainage bag (3,21,31,41) closed at 35,43) and a ceiling (9,25,36,44). In the drainage bag, the drainage tank is divided into a first space (7A, 22A, 32A, 42A) and a second space (7B, 22B, 32B, 42B) from the ceiling portion to the vicinity of the bottom portion. By extending in the vertical direction up to, the partition wall (10, 26, 37, 45) that communicates the first space and the second space near the bottom, and the drainage flows into the first space. It further has a drainage port (13, 28, 39, 47) to communicate with, and is stored in the drainage tank based on the pressure difference between the pressure in the first space and the pressure in the second space. Further, it is provided with a calculation means (5) for calculating the amount of the drainage.

この排液処理システムによれば、排液バッグの排液槽が区画壁によって第１空間と第２空間とに区画され、かつ排液槽の底部付近にてこれらの空間が連通する。排液ポートから排液が流入して排液槽に貯留された排液の量が増加してゆくと、排液の液面が区画壁の下端に達する前は第１空間と第２空間とは同じ圧力であるが、排液の液面が区画壁の下端に達すると連通部分が排液に満たされて第２空間が密閉された状態となる。さらに貯留される排液の量が増加すると第１空間と第２空間との間に圧力差が生じ、排液の量の増加に従ってその圧力差が比例して増加する。この圧力差は、第１空間における排液の液面と第２空間における排液の液面との間の液面差として反映される。つまり、排液を水と仮定した場合、この液面差は水頭圧に相当する。したがって、この圧力差に基づいて液面差を算出できる。すなわち、この液面差に第１空間の横断面積と排液の密度とを乗じることにより、区画壁の下端よりも上側の第１空間内に存在する排液の量（体積）を算出できる。区画壁の下端よりも下側に存在する排液の量は予め特定可能な一定値である。したがって、液面差に基づいて算出された上記排液の量に対して、この一定値を加算することにより排液槽に貯留された排液の量を算出できる。このように、排液バッグの排液槽に貯留された排液の量を第１空間と第２空間との間の圧力差に基づいて算出できるから、排液槽に貯留された排液の液面のレベルや排液バッグの重量を計測することなく、排液槽に貯留された排液の量の時間的変化を記録することを容易に実現できる。 According to this drainage treatment system, the drainage tank of the drainage bag is divided into a first space and a second space by a partition wall, and these spaces communicate with each other near the bottom of the drainage tank. When the drainage flows in from the drainage port and the amount of drainage stored in the drainage tank increases, the first space and the second space before the liquid level of the drainage reaches the lower end of the partition wall. Is the same pressure, but when the liquid level of the drainage reaches the lower end of the partition wall, the communicating portion is filled with the drainage and the second space is sealed. Further, when the amount of drainage to be stored increases, a pressure difference is generated between the first space and the second space, and the pressure difference increases proportionally as the amount of drainage increases. This pressure difference is reflected as a liquid level difference between the liquid level of the drainage liquid in the first space and the liquid level of the drainage liquid in the second space. That is, assuming that the drainage is water, this liquid level difference corresponds to the head pressure. Therefore, the liquid level difference can be calculated based on this pressure difference. That is, by multiplying this liquid level difference by the cross-sectional area of the first space and the density of the drainage, the amount (volume) of the drainage existing in the first space above the lower end of the partition wall can be calculated. The amount of drainage existing below the lower end of the partition wall is a constant value that can be specified in advance. Therefore, the amount of drainage stored in the drainage tank can be calculated by adding this constant value to the amount of drainage calculated based on the liquid level difference. In this way, since the amount of drainage stored in the drainage tank of the drainage bag can be calculated based on the pressure difference between the first space and the second space, the drainage stored in the drainage tank can be calculated. It is possible to easily record the change over time in the amount of drainage stored in the drainage tank without measuring the level of the liquid level or the weight of the drainage bag.

本発明の排液処理システムの一態様において、前記排液バッグは、吸引源（４、Ａｓｐ）が発生源である負圧を前記第１空間に供給する負圧供給手段（１２、２３及び２７、３３及び３８）と、前記第２空間に連通し前記第２空間内の圧力を測定可能な圧力測定ポート（１４、２９、４０、４８）と、を更に有してもよい。例えば、患者の胸腔から体液を排出させる場合は吸引することが必要となるが、この態様においては第１空間を負圧にして排液槽に排液を導くことができる。 In one aspect of the effluent treatment system of the present invention, the effluent bag is a negative pressure supply means (12, 23 and 27) that supplies a negative pressure from a suction source (4, Asp) to the first space. , 33 and 38), and pressure measuring ports (14, 29, 40, 48) that communicate with the second space and can measure the pressure in the second space. For example, when draining body fluid from the patient's thoracic cavity, suction is required, but in this embodiment, the first space can be set to a negative pressure to guide the drainage to the drainage tank.

第１空間内の圧力と第２空間内の圧力との圧力差はどのように取得しても構わない。例えば、前記第１空間内の圧力を取得する第１圧力取得手段（１５Ａ）と、前記第２空間内の圧力を取得する第２圧力取得手段（１５Ｂ）と、を更に備え、前記算出手段は、前記第１圧力取得手段が取得した前記第１空間内の圧力と前記第２圧力取得手段が取得した前記第２空間内の圧力とに基づいて前記圧力差を算出してもよい。 The pressure difference between the pressure in the first space and the pressure in the second space may be obtained in any way. For example, the calculation means further includes a first pressure acquisition means (15A) for acquiring the pressure in the first space and a second pressure acquisition means (15B) for acquiring the pressure in the second space. The pressure difference may be calculated based on the pressure in the first space acquired by the first pressure acquisition means and the pressure in the second space acquired by the second pressure acquisition means.

負圧供給手段、第１圧力取得手段、及び第２圧力取得手段のそれぞれは適宜の構成を採用できる。例えば、前記負圧供給手段として、前記第１空間に連通し前記吸引源が接続される吸引ポート（１２）が設けられ、前記第１圧力取得手段として、前記吸引源と前記吸引ポートとの間の圧力を測定する第１圧力センサ（１５Ａ）が設けられ、前記第２圧力取得手段として、前記圧力測定ポートに接続された第２圧力センサ（１５Ｂ）が設けられてもよい。また、前記負圧供給手段として、前記第１空間に連通し、かつ液体（Ｌ）が収められた水封槽（２３、３３）と、前記水封槽に連通し前記吸引源が接続される吸引ポート（２７、３８）と、が設けられ、前記第１圧力取得手段として、前記第１空間内の圧力を測定する第１圧力センサ（１５Ａ）又は前記吸引ポートに接続された第３圧力センサ（１５Ｃ）が設けられてもよい。 Each of the negative pressure supply means, the first pressure acquisition means, and the second pressure acquisition means can adopt an appropriate configuration. For example, as the negative pressure supply means, a suction port (12) communicating with the first space and connecting the suction source is provided, and as the first pressure acquisition means, between the suction source and the suction port. A first pressure sensor (15A) for measuring the pressure of the above may be provided, and a second pressure sensor (15B) connected to the pressure measuring port may be provided as the second pressure acquisition means. Further, as the negative pressure supply means, the water sealing tanks (23, 33) communicating with the first space and containing the liquid (L) are connected to the water sealing tank and the suction source is connected. A suction port (27, 38) is provided, and as the first pressure acquisition means, a first pressure sensor (15A) for measuring the pressure in the first space or a third pressure sensor connected to the suction port is provided. (15C) may be provided.

本発明の一態様において、前記排液バッグは、前記第１空間を大気に開放する状態と前記第１空間を閉鎖する状態とを切り替え可能なベント（４６）を更に有してもよい。排液バッグのベントによって第１空間を開放することにより排液槽を大気圧に保持できるので、例えば、心臓や消化器系の手術後において、排液を排液槽にスムーズに導くことができる。 In one aspect of the present invention, the drainage bag may further have a vent (46) capable of switching between a state in which the first space is open to the atmosphere and a state in which the first space is closed. Since the drainage tank can be held at atmospheric pressure by opening the first space by venting the drainage bag, the drainage can be smoothly guided to the drainage tank, for example, after surgery on the heart or digestive system. ..

本発明の一態様において、前記第１空間内の圧力と前記第２空間内の圧力との圧力差を測定する差圧センサ（５０）を更に備え、前記演算手段は、前記差圧センサが測定した前記圧力差に対して前記第１空間の横断面積と排液の密度とを乗じて前記区画壁の下端よりも上側の前記第１空間に存在する排液の量を算出し、その算出結果に基づいて前記排液槽に貯留された前記排液の量を算出してもよい。この態様によれば、第１空間内の圧力と第２空間内の圧力との圧力差を直接測定し、その測定結果を排液槽に貯留された排液の量の算出に利用することができる。 In one aspect of the present invention, the differential pressure sensor (50) for measuring the pressure difference between the pressure in the first space and the pressure in the second space is further provided, and the calculation means is measured by the differential pressure sensor. The pressure difference was multiplied by the cross-sectional area of the first space and the density of drainage to calculate the amount of drainage existing in the first space above the lower end of the partition wall, and the calculation result was obtained. The amount of the drainage stored in the drainage tank may be calculated based on the above. According to this aspect, the pressure difference between the pressure in the first space and the pressure in the second space can be directly measured, and the measurement result can be used to calculate the amount of drainage stored in the drainage tank. can.

本発明の排液処理システムの一態様において、前記排液槽の前記底部は、前記第１空間に対応し前記区画壁の下端と高さが合わせられた高底部（８ａ）と、前記第２空間に対応し前記高底部よりも低い位置に設けられた低底部（８ｂ）とを有してもよい。この態様によれば、高底部と低底部との間に高低差が存在し、区画壁の下端に達する前には低底部側のみに排液が貯留される。したがって、その高低差を適宜調整することにより、区画壁の下端に達する前に排液槽の底部全体に排液が貯留される態様に比べて、区画壁の下端に達する前に貯留される排液の量を少なくできる。これにより、この排液の量を加算することによる誤差を低減できる。 In one aspect of the drainage treatment system of the present invention, the bottom portion of the drainage tank has a high bottom portion (8a) corresponding to the first space and having a height aligned with the lower end of the partition wall, and the second portion. It may have a low bottom portion (8b) provided at a position lower than the high bottom portion corresponding to the space. According to this aspect, there is a height difference between the high bottom portion and the low bottom portion, and the drainage is stored only on the low bottom portion side before reaching the lower end of the partition wall. Therefore, by appropriately adjusting the height difference, the drainage is stored before reaching the lower end of the partition wall, as compared with the mode in which the drainage is stored in the entire bottom of the drainage tank before reaching the lower end of the partition wall. The amount of liquid can be reduced. This makes it possible to reduce the error caused by adding the amount of this drainage.

なお、以上の説明では本発明の理解を容易にするために添付図面の参照符号を括弧書きにて付記したが、それにより本発明が図示の形態に限定されるものではない。 In the above description, reference numerals of the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

以上説明したように、本発明によれば、排液バッグの排液槽に貯留された排液の量を第１空間と第２空間との間の圧力差に基づいて算出できるから、排液槽に貯留された排液の液面のレベルや排液バッグの重量を計測することなく、排液槽に貯留された排液の量の時間的変化を記録することを容易に実現できる。 As described above, according to the present invention, the amount of drainage stored in the drainage tank of the drainage bag can be calculated based on the pressure difference between the first space and the second space. It is possible to easily record a change in the amount of drainage stored in the drainage tank over time without measuring the level of the drainage liquid level stored in the tank or the weight of the drainage bag.

本発明の第１の形態に係る排液処理システムを模式的に示した図。The figure which showed typically the drainage treatment system which concerns on 1st Embodiment of this invention. 本発明の第２の形態に係る排液処理システムを模式的に示した図。The figure which showed typically the drainage treatment system which concerns on the 2nd embodiment of this invention. 本発明の第３の形態に係る排液処理システムを模式的に示した図。The figure which showed typically the drainage treatment system which concerns on 3rd Embodiment of this invention. 本発明の第４の形態に係る排液処理システムを模式的に示した図。The figure which showed typically the drainage treatment system which concerns on 4th Embodiment of this invention. 差圧センサを設けた変形例を模式的に示した説明図。Explanatory drawing which schematically showed the modification which provided the differential pressure sensor.

（第１の形態）
図１に示したように、排液処理システム１Ａは、吸引源を内蔵する電動式吸引器として構成されており、例えば、胸部外科手術後の患者や気胸の治療中の患者の胸腔に留置したドレーンチューブ２と、そのドレーンチューブ２に接続された排液バッグ３と、吸引回路６を介して排液バッグ３に接続された吸引源としての吸引ポンプ４と、吸引ポンプ４等の各部を制御したり必要な演算処理を実行したりする演算ユニット５とを備えている。 (First form)
As shown in FIG. 1, the drainage treatment system 1A is configured as an electric suction device with a built-in suction source, and is placed, for example, in the thoracic cavity of a patient after thoracic surgery or a patient undergoing pneumothorax treatment. Controls each part of the drain tube 2, the drainage bag 3 connected to the drain tube 2, the suction pump 4 as a suction source connected to the drainage bag 3 via the suction circuit 6, and the suction pump 4. It is provided with an arithmetic unit 5 for performing and executing necessary arithmetic processing.

排液バッグ３は吸引された患者の体液である排液Ｌｄを貯留する排液槽７を有している。排液槽７は底部８及び天井部９にて閉じられている。底部８には一例として階段状に高低差が設けられている。排液槽７は区画壁１０にて第１空間７Ａと第２空間７Ｂとに区画されている。区画壁１０は天井部９から底部８付近まで上下方向（図の上下方向）に延びることにより、底部８付近にて第１空間７Ａと第２空間７Ｂとを連通させる。区画壁１０の下端１０ａは底部８と非接触となっている。底部８は、区画壁１０の下端１０ａと高さが合わせられた高底部８ａと、高底部８ａよりも低い位置に設けられた低底部８ｂとを有する。高底部８ａは第１空間７Ａに対応し、低底部８ｂは第２空間７Ｂに対応する。 The drainage bag 3 has a drainage tank 7 for storing the drainage Ld, which is the body fluid of the sucked patient. The drainage tank 7 is closed at the bottom 8 and the ceiling 9. The bottom 8 is provided with a stepped height difference as an example. The drainage tank 7 is divided into a first space 7A and a second space 7B by a partition wall 10. The partition wall 10 extends in the vertical direction (vertical direction in the figure) from the ceiling portion 9 to the vicinity of the bottom portion 8 so that the first space 7A and the second space 7B communicate with each other in the vicinity of the bottom portion 8. The lower end 10a of the partition wall 10 is not in contact with the bottom 8. The bottom portion 8 has a high bottom portion 8a whose height is matched with the lower end 10a of the partition wall 10, and a low bottom portion 8b provided at a position lower than the high bottom portion 8a. The high bottom portion 8a corresponds to the first space 7A, and the low bottom portion 8b corresponds to the second space 7B.

排液バッグ３には、吸引回路６の接続位置に設けられて排液槽７の第１空間に連通する吸引ポート１２と、ドレーンチューブ２の接続位置に設けられて排液槽７の第１空間７Ａに連通する排液ポート１３と、排液槽７の第２空間７Ｂに連通し第２空間７Ｂ内の圧力を測定可能な圧力測定ポート１４と、第１空間７Ａ内の圧力を取得する第１圧力取得手段の一例としての第１圧力センサ１５Ａと、第２空間７Ｂ内の圧力を取得する第２圧力取得手段の一例としての第２圧力センサ１５Ｂとを有している。吸引ポート１２は吸引ポンプ４が発生源である負圧を第１空間７Ａに供給する負圧供給手段の一例として機能する。排液ポート１３はドレーンチューブ２が接続されることにより排液Ｌｄを第１空間７Ａに流入させる。第１圧力センサ１５Ａは吸引回路６に接続されていて吸引ポンプ４と吸引ポート１２との間の圧力を測定する。第２圧力センサ１５Ｂは圧力測定ポート１４に接続されていて第２空間７Ｂ内の圧力を測定する。 The drainage bag 3 has a suction port 12 provided at the connection position of the suction circuit 6 and communicating with the first space of the drainage tank 7, and a first drainage tank 7 provided at the connection position of the drain tube 2. The drainage port 13 communicating with the space 7A, the pressure measuring port 14 communicating with the second space 7B of the drainage tank 7 and being able to measure the pressure in the second space 7B, and the pressure in the first space 7A are acquired. It has a first pressure sensor 15A as an example of the first pressure acquisition means, and a second pressure sensor 15B as an example of the second pressure acquisition means for acquiring the pressure in the second space 7B. The suction port 12 functions as an example of the negative pressure supply means for supplying the negative pressure generated by the suction pump 4 to the first space 7A. The drainage port 13 is connected to the drain tube 2 to allow the drainage Ld to flow into the first space 7A. The first pressure sensor 15A is connected to the suction circuit 6 and measures the pressure between the suction pump 4 and the suction port 12. The second pressure sensor 15B is connected to the pressure measuring port 14 and measures the pressure in the second space 7B.

演算ユニット５は一例としてコンピュータとして構成されている。演算ユニット５は、所定のプログラムを実行するとともに、第１圧力センサ１５Ａ及び第２圧力センサ１５Ｂの各信号を参照することによって排液槽７に貯留された排液の量を算出する。排液槽７に貯留された排液Ｌｄの量が増加してゆくと、排液Ｌｄの液面が区画壁１０の下端１０ａに達する前は第１空間７Ａと第２空間７Ｂとは同じ圧力であるが、排液Ｌｄの液面が区画壁１０の下端１０ａに達すると連通部分が排液に満たされて第２空間７Ｂが密閉された状態となる。さらに貯留される排液Ｌｄの量が増加すると第１空間７Ａと第２空間７Ｂとの間に圧力差が生じ、排液Ｌｄの量の増加に従ってその圧力差が比例して増加する。この圧力差は、第１空間７Ａにおける排液Ｌｄの液面Ｐ１の高さと第２空間７Ｂにおける排液Ｌｄの液面Ｐ２の高さとの間の液面差Δｈとして反映される。つまり、排液Ｌｄを水と仮定した場合、この液面差Δｈは水頭圧に相当する。したがって、この圧力差に基づいて液面差Δｈを算出できる。 The arithmetic unit 5 is configured as a computer as an example. The calculation unit 5 executes a predetermined program and calculates the amount of drainage stored in the drainage tank 7 by referring to the signals of the first pressure sensor 15A and the second pressure sensor 15B. As the amount of drainage Ld stored in the drainage tank 7 increases, the pressure of the first space 7A and the second space 7B is the same before the liquid level of the drainage Ld reaches the lower end 10a of the partition wall 10. However, when the liquid level of the drainage Ld reaches the lower end 10a of the partition wall 10, the communicating portion is filled with the drainage and the second space 7B is sealed. Further, when the amount of the drainage Ld to be stored increases, a pressure difference is generated between the first space 7A and the second space 7B, and the pressure difference increases proportionally as the amount of the drainage Ld increases. This pressure difference is reflected as a liquid level difference Δh between the height of the liquid level P1 of the drainage Ld in the first space 7A and the height of the liquid level P2 of the drainage Ld in the second space 7B. That is, assuming that the drainage Ld is water, this liquid level difference Δh corresponds to the head pressure. Therefore, the liquid level difference Δh can be calculated based on this pressure difference.

そこで、演算ユニット５は、次式１に基づいて液面差Δｈを算出するとともに、次式２に基づいて液面差Δｈに第１空間７Ａの横断面積Ｓと排液の密度ρとを乗じることにより、区画壁１０の下端１０ａよりも上側の非ハッチング領域に存在する排液の量（体積）Ｖａを算出する。 Therefore, the calculation unit 5 calculates the liquid level difference Δh based on the following equation 1, and multiplies the liquid level difference Δh by the cross-sectional area S of the first space 7A and the density ρ of the drainage based on the following equation 2. Thereby, the amount (volume) Va of the drainage existing in the non-hatching region above the lower end 10a of the partition wall 10 is calculated.

Δｈ［ｃｍ］＝ＰＡ−ＰＢ ……１
ここで、ＰＡは第１空間７Ａ内の圧力［ｃｍＨ_２Ｏ］であり、ＰＢは第２空間７Ｂ内の圧力［ｃｍＨ_２Ｏ］である。 Δh [cm] = PA-PB …… 1
Here, PA is the pressure [cmH ₂ O] in the first space 7A, and PB is the pressure [cmH ₂ O] in the second space 7B.

Ｖａ［ｃｍ^３］＝Δｈ×Ｓ×ρ ……２ Va [cm ³ ] = Δh × S × ρ …… 2

区画壁１０の下端１０ａよりも下側のハッチング領域に存在する排液の量Ｖｂは予め特定可能な一定値である。したがって、演算ユニット５は次式３に基づいて、排液槽７に貯留された排液の量ＬＶを算出し、その算出結果を所定の記憶手段に時間と関連付けて記憶する。これにより、演算ユニット５は本発明の算出手段の一例として機能する。なお、演算ユニット５は記憶した算出結果を必要に応じて所定の出力手段に出力させる。 The amount Vb of drainage existing in the hatched region below the lower end 10a of the partition wall 10 is a constant value that can be specified in advance. Therefore, the calculation unit 5 calculates the amount LV of the drainage stored in the drainage tank 7 based on the following equation 3, and stores the calculation result in a predetermined storage means in association with time. As a result, the arithmetic unit 5 functions as an example of the calculation means of the present invention. The calculation unit 5 outputs the stored calculation result to a predetermined output means as needed.

ＬＶ＝Ｖａ＋Ｖｂ ……３ LV = Va + Vb …… 3

このように、排液バッグ３の排液槽７に貯留された排液の量ＬＶを第１空間７Ａ内の圧力と第２空間７Ｂ内の圧力との間の圧力差に基づいて算出できるから、排液槽７に貯留された排液Ｌｄの液面のレベルや排液バッグ３の重量を計測することなく、排液槽７に貯留された排液Ｌｄの量ＬＶの時間的変化を記録することを容易に実現できる。 In this way, the amount LV of the drainage stored in the drainage tank 7 of the drainage bag 3 can be calculated based on the pressure difference between the pressure in the first space 7A and the pressure in the second space 7B. , Record the time change of the amount LV of the drainage Ld stored in the drainage tank 7 without measuring the level of the liquid level of the drainage Ld stored in the drainage tank 7 or the weight of the drainage bag 3. Can be easily realized.

また、第１の形態によれば、排液槽７の底部８において高底部８ａと低底部８ｂとの間に一例として階段状の高低差が存在し、区画壁１０の下端１０ａに達する前には低底部８ｂ側のみに排液Ｌｄが貯留される。したがって、その高低差を適宜調整することにより、区画壁１０の下端１０ａに達する前に底部８全体に排液が貯留される態様に比べて、区画壁１０の下端１０ａに達する前に貯留される排液Ｌｄの量Ｖｂを少なくできる。これにより、この排液の量Ｖｂを加算することによる誤差を低減できる。 Further, according to the first aspect, in the bottom portion 8 of the drainage tank 7, there is a stepped height difference between the high bottom portion 8a and the low bottom portion 8b as an example, and before reaching the lower end 10a of the partition wall 10. The drainage Ld is stored only on the low bottom 8b side. Therefore, by appropriately adjusting the height difference, the drainage is stored before reaching the lower end 10a of the partition wall 10, as compared with the mode in which the drainage is stored in the entire bottom 8 before reaching the lower end 10a of the partition wall 10. The amount of drainage Ld Vb can be reduced. Thereby, the error due to the addition of the amount Vb of the drainage can be reduced.

（第２の形態）
次に、図２を参照しながら本発明の第２の形態を説明する。なお、以下の説明において、第１の形態と共通の構成には図面に同一の参照符号を付して説明を省略ないし簡略化する。第２の形態の排液処理システム１Ｂは電動式吸引器として構成されていてドレーンチューブ２が接続された排液バッグ２１を備えている。排液バッグ２１は排液Ｌｄを貯留する排液槽２２と、この排液槽２２に連通する水封槽２３とを有している。排液槽２２は底部２４及び天井部２５にて閉じられていて、底部２４及び天井部２５のそれぞれは同一高さで水封槽２３と共通である。また、排液槽２２は区画壁２６にて第１空間２２Ａと第２空間２２Ｂとに区画される。区画壁２６は天井部２５から底部２４付近まで上下方向に延びることにより、底部２４付近にて第１空間２２Ａと第２空間２２Ｂとを連通させる。水封槽２３は水等の液体Ｌが収められていて患者側への外気の逆流を防止するために設けられている。 (Second form)
Next, the second embodiment of the present invention will be described with reference to FIG. In the following description, the same reference numerals will be added to the drawings for the configuration common to the first embodiment, and the description will be omitted or simplified. The drainage treatment system 1B of the second embodiment is configured as an electric suction device and includes a drainage bag 21 to which the drain tube 2 is connected. The drainage bag 21 has a drainage tank 22 for storing the drainage Ld and a water sealing tank 23 communicating with the drainage tank 22. The drainage tank 22 is closed by the bottom portion 24 and the ceiling portion 25, and each of the bottom portion 24 and the ceiling portion 25 has the same height and is common to the water sealing tank 23. Further, the drainage tank 22 is divided into a first space 22A and a second space 22B by a partition wall 26. The partition wall 26 extends in the vertical direction from the ceiling portion 25 to the vicinity of the bottom portion 24, so that the first space 22A and the second space 22B communicate with each other in the vicinity of the bottom portion 24. The water sealing tank 23 contains a liquid L such as water and is provided to prevent backflow of outside air to the patient side.

排液バッグ２１には、水封槽２３に連通し吸引回路６を介して吸引ポンプ４が接続される吸引ポート２７と、ドレーンチューブ２の接続位置に設けられて排液槽２２の第１空間２２Ａに連通する排液ポート２８と、排液槽２２の第２空間２２Ｂに連通し第２空間２２Ｂ内の圧力を測定可能な圧力測定ポート２９と、第１空間２２Ａ内の圧力を取得する第１圧力取得手段の一例としての第１圧力センサ１５Ａと、第２空間２２Ｂ内の圧力を取得する第２圧力取得手段の一例としての第２圧力センサ１５Ｂと、吸引ポート２７に吸引回路６を介して接続され、吸引ポンプ４の制御に使用される第３圧力センサ１５Ｃと、を有している。水封槽２３と吸引ポート２７とは吸引ポンプ４が発生源である負圧を第１空間２２Ａに供給する負圧供給手段の一例として機能する。排液ポート２８はドレーンチューブ２が接続されることにより排液Ｌｄを第１空間２２Ａに流入させる。 The drainage bag 21 has a suction port 27 that communicates with the water sealing tank 23 and is connected to the suction pump 4 via the suction circuit 6, and a first space of the drainage tank 22 provided at the connection position of the drain tube 2. A drainage port 28 communicating with 22A, a pressure measuring port 29 communicating with the second space 22B of the drainage tank 22 and capable of measuring the pressure in the second space 22B, and a first space 22A for acquiring the pressure in the first space 22A. 1 The first pressure sensor 15A as an example of the pressure acquisition means, the second pressure sensor 15B as an example of the second pressure acquisition means for acquiring the pressure in the second space 22B, and the suction port 27 via the suction circuit 6. It has a third pressure sensor 15C, which is connected and used to control the suction pump 4. The water sealing tank 23 and the suction port 27 function as an example of the negative pressure supply means for supplying the negative pressure, which is the source of the suction pump 4, to the first space 22A. The drainage port 28 is connected to the drain tube 2 to allow the drainage Ld to flow into the first space 22A.

演算ユニット５は、第１の形態と同様に、式１〜式３に基づいて排液槽２２に貯留された排液の量ＬＶを算出する。すなわち、演算ユニット５は、第１空間２２Ａ内の圧力と第２空間２２Ｂ内の圧力との圧力差に基づいて液面差Δｈを算出する。そして、その液面差Δｈに対して第１空間２２Ａの横断面積Ｓと排液Ｌｄの密度とを乗じることにより、区画壁２６の下端２６ａよりも上側の非ハッチング領域に存在する排液の量Ｖａを算出する。そして、その排液の量Ｖａに下端２６ａよりも下側のハッチング領域に存在する排液の量Ｖｂを加算することにより、排液槽２２に貯留された排液の量ＬＶを算出し、その算出結果を所定の記憶手段に時間と関連付けて記憶する。これにより、演算ユニット５は本発明に係る算出手段の一例と機能する。なお、演算ユニット５は記憶した算出結果を必要に応じて所定の出力手段に出力させる。 The calculation unit 5 calculates the amount LV of the drainage stored in the drainage tank 22 based on the formulas 1 to 3 as in the first embodiment. That is, the calculation unit 5 calculates the liquid level difference Δh based on the pressure difference between the pressure in the first space 22A and the pressure in the second space 22B. Then, by multiplying the liquid level difference Δh by the cross-sectional area S of the first space 22A and the density of the drainage Ld, the amount of drainage existing in the non-hatched region above the lower end 26a of the partition wall 26. Calculate Va. Then, by adding the amount Vb of the drainage existing in the hatching region below the lower end 26a to the amount Va of the drainage, the amount LV of the drainage stored in the drainage tank 22 is calculated, and the amount LV thereof is calculated. The calculation result is stored in a predetermined storage means in association with time. As a result, the arithmetic unit 5 functions as an example of the calculation means according to the present invention. The calculation unit 5 outputs the stored calculation result to a predetermined output means as needed.

第２の形態によれば、第１の形態と同様に、排液バッグ２１の排液槽２２に貯留された排液の量ＬＶを第１空間２２Ａと第２空間２２Ｂとの間の圧力差に基づいて算出できるから、排液槽２２に貯留された排液Ｌｄの液面のレベルや排液バッグ２１の重量を計測することなく、排液槽２２に貯留された排液Ｌｄの時間的変化を記録することを容易に実現できる。 According to the second embodiment, as in the first embodiment, the amount of drainage LV stored in the drainage tank 22 of the drainage bag 21 is the pressure difference between the first space 22A and the second space 22B. Since it can be calculated based on the above, the time of the drainage Ld stored in the drainage tank 22 is not measured without measuring the level of the liquid level of the drainage Ld stored in the drainage tank 22 or the weight of the drainage bag 21. It is easy to record changes.

なお、第２の形態を、第１圧力センサ１５Ａを省略した形態に変更し、吸引ポート２７に接続された第３圧力センサ１５Ｃを本発明に係る第１圧力取得手段の一例として機能させることもできる。水封槽２３の水頭圧を考慮することによって第３圧力センサ１５Ｃが測定する圧力に基づいて第１空間２２Ａ内の圧力を算出できるからである。 The second form may be changed to a form in which the first pressure sensor 15A is omitted, and the third pressure sensor 15C connected to the suction port 27 may function as an example of the first pressure acquisition means according to the present invention. can. This is because the pressure in the first space 22A can be calculated based on the pressure measured by the third pressure sensor 15C by considering the head pressure of the water sealing tank 23.

（第３の形態）
次に、図３を参照しながら本発明の第３の形態を説明する。なお、以下の説明において、第１の形態と共通の構成には図面に同一の参照符号を付して説明を省略ないし簡略化する。第３の形態の排液処理システム１Ｃはドレーンチューブ２が接続された排液バッグ３１を備えている。排液バッグ３１は排液Ｌｄを貯留する排液槽３２と、この排液槽３２に連通する水封槽３３と、水封槽３３と連通しかつ大気開放された調圧槽３４とを有している。排液槽３２は底部３５及び天井部３６にて閉じられており、底部３５及び天井部３６は水封槽３３及び調圧槽３４と共通である。また、排液槽３２は区画壁３７にて第１空間３２Ａと第２空間３２Ｂとに区画される。区画壁３７は天井部３６から底部３５付近まで上下方向に延びることにより底部３５付近にて第１空間３２Ａと第２空間３２Ｂとを連通させる。水封槽３３は水等の液体Ｌが収められていて患者側への外気の逆流を防止するために設けられている。調圧槽３４には水等の液体Ｌ′が収められている。 (Third form)
Next, the third embodiment of the present invention will be described with reference to FIG. In the following description, the same reference numerals will be added to the drawings for the configuration common to the first embodiment, and the description will be omitted or simplified. The drainage treatment system 1C of the third embodiment includes a drainage bag 31 to which the drain tube 2 is connected. The drainage bag 31 has a drainage tank 32 for storing drainage Ld, a water sealing tank 33 communicating with the drainage tank 32, and a pressure regulating tank 34 communicating with the water sealing tank 33 and open to the atmosphere. is doing. The drainage tank 32 is closed by the bottom portion 35 and the ceiling portion 36, and the bottom portion 35 and the ceiling portion 36 are common to the water sealing tank 33 and the pressure regulating tank 34. Further, the drainage tank 32 is divided into a first space 32A and a second space 32B by a partition wall 37. The partition wall 37 extends in the vertical direction from the ceiling portion 36 to the vicinity of the bottom portion 35 so that the first space 32A and the second space 32B communicate with each other in the vicinity of the bottom portion 35. The water sealing tank 33 contains a liquid L such as water and is provided to prevent backflow of outside air to the patient side. The pressure regulating tank 34 contains a liquid L'such as water.

排液バッグ３１には、水封槽３３に連通し吸引回路６を介して壁掛け式の吸引器Ａｓｐが接続される吸引ポート３８と、ドレーンチューブ２の接続位置に設けられて排液槽３２の第１空間３２Ａに連通する排液ポート３９と、排液槽３２の第２空間３２Ｂに連通し第２空間３２Ｂ内の圧力を測定可能な圧力測定ポート４０と、第１空間３２Ａ内の圧力を取得する第１圧力取得手段の一例としての第１圧力センサ１５Ａと、第２空間３２Ｂ内の圧力を取得する第２圧力取得手段の一例としての第２圧力センサ１５Ｂと、を有している。水封槽３３と吸引ポート３８とは吸引器Ａｓｐが発生源である負圧を第１空間３２Ａに供給する負圧供給手段の一例として機能する。排液ポート３９はドレーンチューブ２が接続されることにより排液Ｌｄを第１空間３２Ａに流入させる。 The drainage bag 31 is provided with a suction port 38 which communicates with the water sealing tank 33 and is connected to a wall-mounted suction device Asp via a suction circuit 6, and a drainage tank 32 provided at a connection position of the drain tube 2. A drainage port 39 communicating with the first space 32A, a pressure measuring port 40 communicating with the second space 32B of the drainage tank 32 and capable of measuring the pressure in the second space 32B, and a pressure in the first space 32A. It has a first pressure sensor 15A as an example of the first pressure acquisition means to be acquired, and a second pressure sensor 15B as an example of the second pressure acquisition means to acquire the pressure in the second space 32B. The water sealing tank 33 and the suction port 38 function as an example of the negative pressure supply means for supplying the negative pressure, which is the source of the suction device Asp, to the first space 32A. The drainage port 39 is connected to the drain tube 2 to allow the drainage Ld to flow into the first space 32A.

演算ユニット５は、第１の形態と同様に、式１〜式３に基づいて排液槽３２に貯留された排液の量ＬＶを算出する。すなわち、演算ユニット５は、第１空間３２Ａ内の圧力と第２空間３２Ｂ内の圧力との圧力差に基づいて液面差Δｈを算出する。そして、その液面差Δｈに対して第１空間３２Ａの横断面積Ｓと排液Ｌｄの密度とを乗じることにより、区画壁３７の下端３７ａよりも上側の非ハッチング領域に存在する排液の量Ｖａを算出する。そして、その排液の量Ｖａに対して下端３７ａよりも下側のハッチング領域に存在する排液の量Ｖｂを加算することにより、排液槽３２に貯留された排液の量ＬＶを算出し、その算出結果を所定の記憶手段に時間と関連付けて記憶する。これにより、演算ユニット５は本発明に係る算出手段の一例と機能する。なお、演算ユニット５は記憶した算出結果を必要に応じて所定の出力手段に出力させる。 The calculation unit 5 calculates the amount LV of the drainage stored in the drainage tank 32 based on the formulas 1 to 3 as in the first embodiment. That is, the calculation unit 5 calculates the liquid level difference Δh based on the pressure difference between the pressure in the first space 32A and the pressure in the second space 32B. Then, by multiplying the liquid level difference Δh by the cross-sectional area S of the first space 32A and the density of the drainage Ld, the amount of drainage existing in the non-hatched region above the lower end 37a of the partition wall 37. Calculate Va. Then, by adding the amount Vb of the drainage existing in the hatching region below the lower end 37a to the amount Va of the drainage, the amount LV of the drainage stored in the drainage tank 32 is calculated. , The calculation result is stored in a predetermined storage means in association with time. As a result, the arithmetic unit 5 functions as an example of the calculation means according to the present invention. The calculation unit 5 outputs the stored calculation result to a predetermined output means as needed.

第３の形態によれば、第１の形態と同様に、排液バッグ３１の排液槽３２に貯留された排液の量ＬＶを第１空間３２Ａと第２空間３２Ｂとの間の圧力差に基づいて算出できるから、排液槽３２に貯留された排液Ｌｄの液面のレベルや排液バッグ３１の重量を計測することなく、排液槽３２に貯留された排液Ｌｄの量ＬＶの時間的変化を記録することを容易に実現できる。 According to the third embodiment, as in the first embodiment, the amount of drainage LV stored in the drainage tank 32 of the drainage bag 31 is the pressure difference between the first space 32A and the second space 32B. Since it can be calculated based on the above, the amount of drainage Ld stored in the drainage tank 32 is LV without measuring the level of the liquid level of the drainage Ld stored in the drainage tank 32 or the weight of the drainage bag 31. It can be easily realized to record the change over time.

（第４の形態）
次に、図４を参照しながら本発明の第４の形態を説明する。なお、以下の説明において、第１の形態と共通の構成には図面に同一の参照符号を付して説明を省略ないし簡略化する。第４の形態の排液処理システム１Ｄはドレーンチューブ２が接続された排液バッグ４１を備えている。排液バッグ４１は排液Ｌｄを貯留する排液槽４２を有している。排液槽４２は、底部４３及び天井部４４にて閉じられている。また、排液槽４２は区画壁４５にて第１空間４２Ａと第２空間４２Ｂとに区画される。区画壁４５は天井部４４から底部４３付近まで上下方向に延びることにより底部４３付近にて第１空間４２Ａと第２空間４２Ｂとを連通させる。 (Fourth form)
Next, a fourth aspect of the present invention will be described with reference to FIG. In the following description, the same reference numerals will be added to the drawings for the configuration common to the first embodiment, and the description will be omitted or simplified. The drainage treatment system 1D of the fourth embodiment includes a drainage bag 41 to which the drain tube 2 is connected. The drainage bag 41 has a drainage tank 42 for storing the drainage Ld. The drainage tank 42 is closed at the bottom portion 43 and the ceiling portion 44. Further, the drainage tank 42 is divided into a first space 42A and a second space 42B by a partition wall 45. The partition wall 45 extends in the vertical direction from the ceiling portion 44 to the vicinity of the bottom portion 43 so that the first space 42A and the second space 42B communicate with each other in the vicinity of the bottom portion 43.

排液バッグ４１には、第１空間４２Ａを大気に開放する状態と第１空間４２Ａを閉鎖する状態とを切り替え可能なベント４６と、ドレーンチューブ２の接続位置に設けられて排液槽４２の第１空間４２Ａに連通する排液ポート４７と、排液槽４２の第２空間４２Ｂに連通し第２空間４２Ｂ内の圧力を測定可能な圧力測定ポート４８と、第１空間４２Ａ内の圧力を取得する第１圧力取得手段の一例としての第１圧力センサ１５Ａと、第２空間４２Ｂ内の圧力を取得する第２圧力取得手段の一例としての第２圧力センサ１５Ｂと、を有している。排液ポート４７はドレーンチューブ２が接続されることにより排液Ｌｄを第１空間４２Ａに流入させる。 The drainage bag 41 is provided with a vent 46 capable of switching between a state in which the first space 42A is open to the atmosphere and a state in which the first space 42A is closed, and a drainage tank 42 provided at a connection position of the drain tube 2. The drainage port 47 communicating with the first space 42A, the pressure measuring port 48 communicating with the second space 42B of the drainage tank 42 and being able to measure the pressure in the second space 42B, and the pressure in the first space 42A. It has a first pressure sensor 15A as an example of the first pressure acquisition means to be acquired, and a second pressure sensor 15B as an example of the second pressure acquisition means to acquire the pressure in the second space 42B. The drainage port 47 is connected to the drain tube 2 to allow the drainage Ld to flow into the first space 42A.

演算ユニット５は、第１の形態と同様に、式１〜式３に基づいて排液槽４２に貯留された排液の量ＬＶを算出する。すなわち、演算ユニット５は、第１空間４２Ａ内の圧力と第２空間４２Ｂ内の圧力との圧力差に基づいて液面差Δｈを算出する。そして、その液面差Δｈに対して第１空間４２Ａの横断面積Ｓと排液Ｌｄの密度とを乗じることにより、区画壁４５の下端４５ａよりも上側の非ハッチング領域に存在する排液の量Ｖａを算出する。そして、その排液の量Ｖａに対して下端４５ａよりも下側のハッチング領域に存在する排液の量Ｖｂを加算することにより、排液槽４２に貯留された排液の量ＬＶを算出し、その算出結果を所定の記憶手段に時間と関連付けて記憶する。これにより、演算ユニット５は本発明に係る算出手段の一例と機能する。なお、演算ユニット５は記憶した算出結果を必要に応じて所定の出力手段に出力させる。 The calculation unit 5 calculates the amount LV of the drainage stored in the drainage tank 42 based on the formulas 1 to 3 as in the first embodiment. That is, the calculation unit 5 calculates the liquid level difference Δh based on the pressure difference between the pressure in the first space 42A and the pressure in the second space 42B. Then, by multiplying the liquid level difference Δh by the cross-sectional area S of the first space 42A and the density of the drainage Ld, the amount of drainage existing in the non-hatched region above the lower end 45a of the partition wall 45. Calculate Va. Then, by adding the amount Vb of the drainage existing in the hatching region below the lower end 45a to the amount Va of the drainage, the amount LV of the drainage stored in the drainage tank 42 is calculated. , The calculation result is stored in a predetermined storage means in association with time. As a result, the arithmetic unit 5 functions as an example of the calculation means according to the present invention. The calculation unit 5 outputs the stored calculation result to a predetermined output means as needed.

第４の形態によれば、第１の形態と同様に、排液バッグ４１の排液槽４２に貯留された排液Ｌｄの量ＬＶを第１空間４２Ａと第２空間４２Ｂとの間の圧力差に基づいて算出できるから、排液槽４２に貯留された排液Ｌｄの液面のレベルや排液バッグ４１の重量を計測することなく、排液槽４２に貯留された排液Ｌｄの量ＬＶの時間的変化を記録することを容易に実現できる。 According to the fourth embodiment, as in the first embodiment, the amount LV of the drainage Ld stored in the drainage tank 42 of the drainage bag 41 is the pressure between the first space 42A and the second space 42B. Since it can be calculated based on the difference, the amount of drainage Ld stored in the drainage tank 42 without measuring the level of the liquid level of the drainage Ld stored in the drainage tank 42 or the weight of the drainage bag 41. It can be easily realized to record the time change of LV.

本発明は上記各形態に限定されず、本発明の要旨の範囲内において種々の形態にて実施できる。上記各形態の排液槽は、その横断面積が上下方向に関して一定となる構成であるが、上下方向に関して横断面積が変化する構成となる形態で本発明を実施することもできる。この形態の場合は、横断面積を高さの関数として表現し、液面差Δｈの範囲で積分することにより区画壁の下端よりも上側の排液の量を算出できる。 The present invention is not limited to each of the above forms, and can be carried out in various forms within the scope of the gist of the present invention. The drainage tank of each of the above forms has a configuration in which the cross-sectional area is constant in the vertical direction, but the present invention can also be implemented in a configuration in which the cross-sectional area changes in the vertical direction. In the case of this form, the cross-sectional area is expressed as a function of height, and the amount of drainage above the lower end of the partition wall can be calculated by integrating within the range of the liquid level difference Δh.

また、上記各形態では、第１圧力センサ及び第２圧力センサによって第１空間内の圧力と第２空間内の圧力とをそれぞれ測定してこれらの圧力差を算出している。しかしながら、図５に示すように、第１圧力センサ及び第２圧力センサの代わりに、その圧力差を直接測定できる差圧センサ５０を設け、その測定結果に基づいて排液Ｌｄの量ＬＶを算出する形態に上記各形態を変更することもできる。 Further, in each of the above embodiments, the pressure in the first space and the pressure in the second space are measured by the first pressure sensor and the second pressure sensor, respectively, and the pressure difference between them is calculated. However, as shown in FIG. 5, instead of the first pressure sensor and the second pressure sensor, a differential pressure sensor 50 capable of directly measuring the pressure difference is provided, and the amount LV of the drainage Ld is calculated based on the measurement result. It is also possible to change each of the above forms to the form to be used.

この場合、例えば、演算ユニット５は、上記の圧力差ΔＰを差圧センサ５０の出力信号に基づいて取得し、上記式１及び式２の代わりに下記の式４を使用して下端４５ａよりも上側の排液Ｌｄの量Ｖａを算出する。そして、式３に基づいて排液Ｌｄの量ＬＶを算出する。これにより、演算ユニット５は本発明に係る算出手段の一例として機能する。この変形例によれば、第１空間内の圧力と第２空間内の圧力との圧力差を直接測定し、その測定結果を排液槽に貯留された排液の量の算出に利用することができる。なお、図５の変形例は、第１の形態を変更したものであるが、第２〜第４の各形態においても、各圧力センサ１５Ａ、１５Ｂの代わりに差圧センサ５０を設ける形態に変更することができる。 In this case, for example, the arithmetic unit 5 acquires the above pressure difference ΔP based on the output signal of the differential pressure sensor 50, and uses the following equation 4 instead of the above equations 1 and 2, from the lower end 45a. The amount Va of the upper drainage Ld is calculated. Then, the amount LV of the drainage Ld is calculated based on the formula 3. As a result, the arithmetic unit 5 functions as an example of the calculation means according to the present invention. According to this modification, the pressure difference between the pressure in the first space and the pressure in the second space is directly measured, and the measurement result is used to calculate the amount of drainage stored in the drainage tank. Can be done. In the modified example of FIG. 5, the first form is changed, but in each of the second to fourth forms, the differential pressure sensor 50 is provided instead of the pressure sensors 15A and 15B. can do.

Ｖａ［ｃｍ^３］＝ΔＰ×Ｓ×ρ ……４ Va [cm ³ ] = ΔP × S × ρ …… 4

１Ａ〜１Ｄ排液処理システム
４吸引ポンプ（吸引源）
５演算ユニット（算出手段）
３、２１、３１、４１排液バッグ
７、２２、３２、４２排液槽
７Ａ、２２Ａ、３２Ａ、４２Ａ第１空間
７Ｂ、２２Ｂ、３２Ｂ、４２Ｂ第２空間
８、２４、３５、４３底部
９、２５、３６、４４天井部
１０、２６、３７、４５区画壁
１０ａ、２６ａ、３７ａ、４５ａ区画壁の下端
１２、２７、３８吸引ポート（負圧供給手段）
１３、２８、３９、４７排液ポート
１４、２９、４０、４８圧力測定ポート
２３、３３水封槽（負圧供給手段）
Ａｓｐ吸引器 1A ~ 1D Drainage treatment system 4 Suction pump (suction source)
5 Calculation unit (calculation means)
3, 21, 31, 41 Drainage bags 7, 22, 32, 42 Drainage tanks 7A, 22A, 32A, 42A First space 7B, 22B, 32B, 42B Second space 8, 24, 35, 43 Bottom 9, 25, 36, 44 Ceiling portion 10, 26, 37, 45 Partition wall 10a, 26a, 37a, 45a Lower end of partition wall 12, 27, 38 Suction port (negative pressure supply means)
13, 28, 39, 47 Drainage port 14, 29, 40, 48 Pressure measurement port 23, 33 Water sealing tank (negative pressure supply means)
Asp aspirator

Claims

In a drainage treatment system having a drainage tank in which drainage drained from a patient is stored, the drainage tank is provided with a drainage bag closed at the bottom and ceiling.
The drainage bag extends vertically from the ceiling portion to the vicinity of the bottom portion so as to divide the drainage tank into a first space and a second space, whereby the first space and the said drainage bag are located near the bottom portion. A partition wall that communicates with the second space, a drainage port through which the drainage flows and communicates with the first space, and a negative pressure supply means for supplying negative pressure from which a suction source is generated to the first space. And a pressure measuring port that communicates with the second space and can measure the pressure in the second space.
A calculation means for calculating the amount of the drainage stored in the drainage tank based on the pressure difference between the pressure in the first space and the pressure in the second space, and the pressure in the first space. A first pressure acquisition means for acquiring the pressure in the second space and a second pressure acquisition means for acquiring the pressure in the second space are further provided.
The calculating means, exhaust you calculate the pressure difference based on the pressure of the second space first pressure acquisition unit pressure and the second pressure acquisition means has acquired the first space acquired Liquid treatment system.

As the negative pressure supply means, a suction port communicating with the first space and to which the suction source is connected is provided, and as the first pressure acquisition means, the pressure between the suction source and the suction port is measured. a first pressure sensor is provided, the a second pressure obtaining means, drainage processing system according to claim 1 in which the second pressure sensor coupled to the pressure measuring port is provided.

As the negative pressure supply means, a water sealing tank communicating with the first space and containing a liquid and a suction port communicating with the water sealing tank and connecting the suction source are provided. 1. The drainage treatment system according to claim 1 , wherein a first pressure sensor for measuring the pressure in the first space or a third pressure sensor connected to the suction port is provided as the pressure acquisition means.

In a drainage treatment system having a drainage tank in which drainage drained from a patient is stored, the drainage tank is provided with a drainage bag closed at the bottom and ceiling.
The drainage bag extends in the vertical direction from the ceiling portion to the vicinity of the bottom portion so as to partition the drainage tank into the first space and the second space, whereby the first space and the drainage bag are located near the bottom portion. It further has a partition wall that communicates with the second space and a drainage port through which the drainage flows and communicates with the first space.
A calculation means for calculating the amount of the drainage stored in the drainage tank based on the pressure difference between the pressure in the first space and the pressure in the second space, and the pressure in the first space. further comprising a differential pressure sensor for measuring the pressure difference between the pressure of the second space and,
The calculation means exists in the first space above the lower end of the partition wall by multiplying the pressure difference measured by the differential pressure sensor by the cross-sectional area of the first space and the density of drainage. drainage processing system to calculate the amount of drainage, calculate the amount of the waste liquid stored in the waste liquid tank on the basis of the calculation result.

The bottom of the drainage tank is provided at a high bottom corresponding to the first space and having a height aligned with the lower end of the partition wall, and at a position lower than the high bottom corresponding to the second space. The drainage treatment system according to any one of claims 1 to 4 , which has a low bottom portion.

In a drainage treatment system having a drainage tank in which drainage drained from a patient is stored, the drainage tank is provided with a drainage bag closed at the bottom and ceiling.
The drainage bag extends in the vertical direction from the ceiling portion to the vicinity of the bottom portion so as to partition the drainage tank into the first space and the second space, whereby the first space and the drainage bag are located near the bottom portion. It further has a partition wall that communicates with the second space and a drainage port through which the drainage flows and communicates with the first space.
Further provided with a calculation means for calculating the amount of the drainage stored in the drainage tank based on the pressure difference between the pressure in the first space and the pressure in the second space.
The bottom of the drainage tank is provided at a high bottom corresponding to the first space and having a height aligned with the lower end of the partition wall, and at a position lower than the high bottom corresponding to the second space. A drainage treatment system with a low bottom.