JP2544881B2 - Pneumoperitoneum - Google Patents
PneumoperitoneumInfo
- Publication number
- JP2544881B2 JP2544881B2 JP5114837A JP11483793A JP2544881B2 JP 2544881 B2 JP2544881 B2 JP 2544881B2 JP 5114837 A JP5114837 A JP 5114837A JP 11483793 A JP11483793 A JP 11483793A JP 2544881 B2 JP2544881 B2 JP 2544881B2
- Authority
- JP
- Japan
- Prior art keywords
- intermediate tank
- gas
- pressure
- pneumoperitoneum
- insufflation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は患者の腹壁内に気体を注
入してこの腹腔内部を拡張させ、腹腔内に医療処置に必
要な観察視野を確保する気腹装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumoperitoneum device for injecting gas into the abdominal wall of a patient to expand the inside of the abdominal cavity to secure an observation visual field necessary for medical treatment in the abdominal cavity.
【０００２】[0002]
【従来の技術】従来からこの種の気腹装置としては例え
ば独国特許４０１９２３９号公報に示される構成のもの
がある。これは、例えばガスタンク等の送気ガスの供給
源と患者の腹腔内に刺入されるガス注入具との間の送気
管路中に２個の中間タンクが並列に配設されている。2. Description of the Related Art Heretofore, as this type of pneumoperitoneum device, there is a structure shown in German Patent No. 4019239. For example, two intermediate tanks are arranged in parallel in an air supply line between a supply source of an air supply gas such as a gas tank and a gas injecting device inserted into the abdominal cavity of a patient.
【０００３】また、各中間タンクの上流側には流路切換
え弁が配設され、下流側にはそれぞれ開閉弁（出口弁）
が介設されている。そして、供給源から供給される高圧
ガスを上流側の流路切換え弁の切換え動作にともない各
中間タンクに交互に供給することにより、ガス供給源か
ら送られる高圧ガスをこれらの中間タンクに交互に充填
するとともに、ガス充填済みの中間タンク側の出口弁を
開放することにより、ガス充填済みの中間タンク側から
ガス注入具側に送気を行なう構成になっている。さら
に、この装置では中間タンク内の圧力降下特性から腹腔
圧力を算出することにより、送気を中断することのな
い、高速気腹動作を可能としている。A flow path switching valve is provided on the upstream side of each intermediate tank, and an on-off valve (outlet valve) is provided on the downstream side.
Is interposed. Then, by alternately supplying the high-pressure gas supplied from the supply source to each intermediate tank along with the switching operation of the flow path switching valve on the upstream side, the high-pressure gas sent from the gas supply source is alternately supplied to these intermediate tanks. By filling the gas and opening the outlet valve on the side of the gas-filled intermediate tank, air is supplied from the gas-filled intermediate tank to the gas injector. Furthermore, in this device, the abdominal pressure is calculated from the pressure drop characteristic in the intermediate tank, thereby enabling a high-speed pneumoperitoneum operation without interruption of air supply.
【０００４】図８を用いてこの気腹装置の動作を説明す
る。なお、図８の（ａ）は中間タンク内の圧力変化と経
過時間の関係を表し、（ｂ）は（ａ）に示す時刻と同時
刻に気腹装置からガス注入具側に送気されるガスの流量
を表す。また、図８（ａ）中で、実線は一方の中間タン
ク（第１の中間タンク）の動作を示し、破線は他方の中
間タンク（第２の中間タンク）の動作を示す。The operation of this pneumoperitoneum device will be described with reference to FIG. 8A shows the relationship between the pressure change in the intermediate tank and the elapsed time, and FIG. 8B shows the relationship between the time shown in FIG. Indicates the flow rate of gas. Further, in FIG. 8A, the solid line shows the operation of one intermediate tank (first intermediate tank), and the broken line shows the operation of the other intermediate tank (second intermediate tank).
【０００５】まず、ｔ1 時点の前の状態では第１の中間
タンク側への高圧ガスの供給が停止され、出口弁が開状
態に切換えられた送気状態で保持される。このとき、第
２の中間タンク側の出口弁は閉状態で保持され、第２の
中間タンク側に高圧ガスが供給されるガス充填状態で保
持されている。First, in the state before the time point t 1 , the supply of high-pressure gas to the first intermediate tank side is stopped, and the outlet valve is maintained in the air supply state switched to the open state. At this time, the outlet valve on the side of the second intermediate tank is maintained in a closed state, and is maintained in a gas filled state in which high-pressure gas is supplied to the side of the second intermediate tank.
【０００６】そして、ｔ1 時点で、第２の中間タンクの
タンク内圧力が設定圧力状態に達し、ガス充填済みの状
態になると上流側の流路切換え弁が切換え操作され、第
２の中間タンクが送気状態に切換わる。このとき、第１
の中間タンクのタンク内圧力は送気後の低圧力状態とな
っており、上流側の流路切換え弁の切換え動作にともな
いガス充填状態に切換わる。したがって、ｔ1 時点以後
はガス供給源から送られる高圧ガスが第１の中間タンク
側に充填され、第２の中間タンク側からガス注入具側に
送気を行なうようになっている。Then, at time t 1, when the tank internal pressure of the second intermediate tank reaches the set pressure state and becomes the state of being filled with gas, the flow path switching valve on the upstream side is switched and the second intermediate tank is operated. Switches to the air supply state. At this time, the first
The internal pressure of the intermediate tank is in a low pressure state after air supply, and is switched to the gas filling state with the switching operation of the upstream side flow path switching valve. Therefore, after the time point t 1 , the high-pressure gas sent from the gas supply source is filled in the first intermediate tank side and is sent from the second intermediate tank side to the gas injector side.
【０００７】その後、第１の中間タンクのタンク内圧力
が設定圧力状態に達し、ガス充填済みの状態になるｔ2
時点では再び流路切換え弁が切換え操作され、この第１
の中間タンクが送気状態に切換わる。このとき、第２の
中間タンクのタンク内圧力は送気後の低圧力状態となっ
ており、ガス充填状態に切換わる。すなわち、図８の
（ａ）中で、Ｓ1 の区間は第１の中間タンクが充填され
る区間で、Ｓ2 は開放される区間である。第２の中間タ
ンクはこれに半周期遅れ、同様の動作を行なうようにな
っている。After that, the tank internal pressure of the first intermediate tank reaches the set pressure state and becomes a gas filled state t 2
At this point, the flow path switching valve is switched again, and
The intermediate tank of is switched to the air supply state. At this time, the tank internal pressure of the second intermediate tank is in a low pressure state after air supply, and is switched to the gas filling state. That is, in FIG. 8A, the section S 1 is a section in which the first intermediate tank is filled, and the section S 2 is an open section. The second intermediate tank lags behind this by a half cycle and performs the same operation.
【０００８】次に、図８（ｂ）を用いて気腹装置からガ
ス注入具側に送気される流量の変化を説明する。時刻ｔ
1 において第２の中間タンク側の出口弁の開放動作に伴
い送気ガスは第２の中間タンクからガス注入具側に流れ
始める。このｔ1 時点の送気ガスの流量値を最大とし
て、第２の中間タンクのタンク圧力の降下と共にガス注
入具側への送気流量も低下する。この時刻ｔ1 において
は同時に第１の中間タンクの充填が開始される。Next, the change in the flow rate of air sent from the pneumoperitoneum device to the gas injecting device will be described with reference to FIG. 8 (b). Time t
In 1 , the insufflation gas starts to flow from the second intermediate tank to the gas injecting tool side with the opening operation of the outlet valve on the second intermediate tank side. The flow rate value of the air supply gas at time t 1 is maximized, and the air supply flow rate to the gas injecting tool side also decreases as the tank pressure of the second intermediate tank decreases. At this time t 1 , filling of the first intermediate tank is started at the same time.
【０００９】更に、時刻ｔ2 においては第２の中間タン
クからの送気は終了し、代わって第１の中間タンクから
の送気が始まるため、気腹装置からガス注入具側に送気
されるガス流量は再び最大となる。そして、第１の中間
タンク内の圧力降下と共に流量も低下し、ｔ3 において
再び第２の中間タンクからの送気動作が行われる。Further, at time t 2 , the air supply from the second intermediate tank ends, and instead the air supply from the first intermediate tank begins, so the air is sent from the insufflator to the gas injecting device side. The maximum gas flow rate again becomes maximum. Then, the flow rate decreases as well as the pressure drop in the first intermediate tank, and at t 3 , the air feeding operation from the second intermediate tank is performed again.
【００１０】また、気腹装置の動作中の腹腔圧の測定は
次の方法で行われる。すなわち、第１の中間タンクの圧
力降下を同間隔ｄｔで３点測定し、この測定値Ｐａ，Ｐ
ｂ，Ｐｃより腹腔圧Ｐ2 を計算により求める。そして、
この腹腔圧の測定を第１の中間タンクと第２の中間タン
クとで交互に行ない、腹腔圧Ｐ2 が設定値と等しくなる
様に送気制御を行なうようになっている。The abdominal pressure during the operation of the pneumoperitoneum device is measured by the following method. That is, the pressure drop in the first intermediate tank is measured at three points at the same interval dt, and the measured values Pa, P
The abdominal pressure P 2 is calculated from b and Pc. And
The measurement of the abdominal pressure is alternately performed in the first intermediate tank and the second intermediate tank, and the air supply control is performed so that the abdominal pressure P 2 becomes equal to the set value.
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、上記従
来構成のものにあっては腹腔圧を測定するために送気を
中断する必要はないが、中間タンク１回の開放動作にお
いて、タンクの圧力降下に伴い流量が減少する問題があ
る。そのため、中間タンクの充填圧と同圧力の一定圧力
状態で送気し続ける場合に比べて図８（ｂ）の斜線部の
面積分の流量が少なくなるので、腹腔内を目的の状態に
拡張させる気腹動作に要する時間が長くなる問題があ
る。However, in the above-mentioned conventional structure, it is not necessary to interrupt the air supply in order to measure the abdominal pressure, but the pressure drop in the tank is reduced when the intermediate tank is opened once. Therefore, there is a problem that the flow rate decreases. As a result, the flow rate corresponding to the area of the shaded area in FIG. 8B is smaller than in the case where air is continuously supplied at a constant pressure that is the same as the filling pressure of the intermediate tank, so the abdominal cavity is expanded to the desired state. There is a problem that the time required for pneumoperitoneum becomes long.
【００１２】本発明は上記事情に着目してなされたもの
で、その目的は、中間タンクの圧力降下による流量低下
の度合いを低減して気腹時間を短縮することができると
ともに、腹腔内を目的の状態まで精度よく正確に拡張さ
せることができる気腹装置を提供するにある。The present invention has been made in view of the above circumstances, and an object thereof is to reduce the degree of flow rate decrease due to the pressure drop of the intermediate tank to shorten the pneumoperitoneum, and to aim at the abdominal cavity. An object is to provide a pneumoperitoneum device that can be accurately and accurately expanded to the above state.
【００１３】[0013]
【課題を解決する手段】請求項１の発明は供給源から供
給される高圧ガスの送気管路中に中間タンクを設け、こ
の中間タンクを介して腹腔内に拡張用の気腹ガスを供給
するとともに、前記中間タンク内に充填されたガスが放
出される際の前記中間タンクの圧力降下特性にもとづい
て腹腔内圧を測定して前記気腹ガスの送気制御を行なう
気腹装置において、前記送気管路における前記中間タン
クの少なくとも上流側１箇所に設けられた締切弁と、同
一圧力、同一温度下で比較した場合の、前記中間タンク
を通過するガスの量が、前記中間タンクの容量より大き
くなるように、前記締切弁の一回の開通時間を制御する
コントローラとを設けたものである。According to a first aspect of the present invention, an intermediate tank is provided in an air supply conduit for high-pressure gas supplied from a supply source, and an insufflation gas for expansion is supplied into the abdominal cavity through the intermediate tank. In addition, in the pneumoperitoneum device for controlling the insufflation of the pneumoperitoneum gas by measuring the abdominal pressure based on the pressure drop characteristic of the intermediate tank when the gas filled in the intermediate tank is released, The amount of gas passing through the intermediate tank is larger than the capacity of the intermediate tank when compared with a shutoff valve provided at least at one upstream side of the intermediate tank in the trachea at the same pressure and the same temperature. Therefore, the controller for controlling the opening time of the shutoff valve once is provided.
【００１４】請求項２の発明は供給源から供給される高
圧ガスの送気管路中に中間タンクを設け、この中間タン
クを介して腹腔内に拡張用の気腹ガスを供給するととも
に、前記中間タンク内に充填されたガスが放出される際
の前記中間タンクの圧力降下特性にもとづいて腹腔内圧
を測定して前記気腹ガスの送気制御を行なう気腹装置に
おいて、前記送気管路に容量が異なる複数の中間タンク
を並列に接続し、各中間タンクの上流側および下流側の
各流路にそれぞれ開閉弁を介設するとともに、前記各中
間タンクの上流側の開閉弁を開状態、下流側の開閉弁を
閉状態に切換えた気腹ガスの充填動作と、前記各中間タ
ンクの上流側の開閉弁を閉状態、下流側の開閉弁を開状
態に切換えた気腹ガスの供給動作とを前記各中間タンク
毎に位相をずらした状態で制御するコントローラを設け
たものである。According to a second aspect of the present invention, an intermediate tank is provided in the air supply line for the high pressure gas supplied from the supply source, and the insufflation gas for expansion is supplied into the abdominal cavity through this intermediate tank, and the intermediate In the pneumoperitoneum device for controlling the insufflation of the pneumoperitoneum gas by measuring the abdominal pressure based on the pressure drop characteristic of the intermediate tank when the gas filled in the tank is released, the capacity of the insufflation conduit is increased. Different intermediate tanks are connected in parallel, and an on-off valve is provided in each of the upstream and downstream flow paths of each intermediate tank, and the upstream on-off valve of each intermediate tank is in the open state, the downstream side. Operation of filling the insufflation gas by switching the open / close valve on the side to the closed state, and supply operation of the insufflation gas by switching the open / close valve on the upstream side of each intermediate tank to the closed state and the open / close valve on the downstream side to the open state. The phase is shifted for each intermediate tank It is provided with a controller for controlling a state.
【００１５】[0015]
【作用】請求項１の発明では気腹動作時には締切弁を開
放した状態でも中間タンクからの送気ガスの供給を行な
わせ、締切弁を閉じた際の中間タンクの圧力変化を測定
することにより腹腔圧測定を行うことにより高流量の送
気を行い、気腹時間を短縮するようにしたものである。According to the invention of claim 1, during the pneumoperitoneum operation, the air supply gas is supplied from the intermediate tank even when the shutoff valve is opened, and the pressure change in the intermediate tank when the shutoff valve is closed is measured. By measuring the abdominal pressure, a high flow rate is supplied to shorten the pneumoperitoneum time.
【００１６】また、請求項２の発明では容量が大きい中
間タンクからの気腹ガスの供給動作時の最低流量と、容
量が小さい中間タンクからの気腹ガスの供給動作時の最
低流量との間に差を設けることにより、同容量の複数の
中間タンクを使用した場合に比べて高流量の送気動作を
行ない、気腹時間を短縮するようにしたものである。According to the second aspect of the present invention, between the minimum flow rate of the insufflation gas supply operation from the intermediate tank having a large capacity and the minimum flow rate of the insufflation gas supply operation from the intermediate tank having a small capacity. By providing a difference between the two, it is possible to perform a high flow rate of air feeding operation and shorten the pneumoperitoneum time as compared with the case of using a plurality of intermediate tanks of the same capacity.
【００１７】[0017]
【実施例】以下、本発明の第１実施例を図１および図２
を参照して説明する。図１は気腹装置１全体の概略構成
を示すものである。図１中で、２は気腹装置１の送気管
路である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will now be described with reference to FIGS.
Will be described with reference to. FIG. 1 shows a schematic configuration of the whole pneumoperitoneum device 1. In FIG. 1, reference numeral 2 denotes an air supply conduit of the pneumoperitoneum device 1.
【００１８】この送気管路２の入口側にはガス取り入れ
口３が設けられている。このガス取り入れ口３にはＣＯ
2 ガスが充填された高圧ガスボンベ（供給源）４が接続
される。A gas intake 3 is provided on the inlet side of the air supply line 2. CO in this gas intake 3
A high pressure gas cylinder (supply source) 4 filled with 2 gas is connected.
【００１９】ガス取り入れ口３の下流側にはボンベ圧セ
ンサ５が設けられ、続いて１次減圧器６、リリーフ弁７
が設けられている。リリーフ弁７の下流側には２次減圧
器８が接続され、その下流側にはオリフィス９が設けら
れている。A cylinder pressure sensor 5 is provided on the downstream side of the gas intake 3, followed by a primary pressure reducer 6 and a relief valve 7.
Is provided. A secondary pressure reducer 8 is connected downstream of the relief valve 7, and an orifice 9 is provided downstream thereof.
【００２０】また、送気管路２にはオリフィス９の上下
流間の差圧を検出する差圧センサ１０が取付けられてい
る。この差圧センサ１０は例えばマイクロコンピュータ
およびその周辺回路によって形成される制御部１１に電
気的に接続されている。A differential pressure sensor 10 for detecting the differential pressure between the upstream and downstream of the orifice 9 is attached to the air supply line 2. The differential pressure sensor 10 is electrically connected to a control unit 11 formed by, for example, a microcomputer and its peripheral circuits.
【００２１】さらに、オリフィス９の下流側には電磁開
閉弁（締切弁）１２が設けられている。この電磁開閉弁
１２は制御部１１に接続されており、この制御部１１に
よって開閉動作が制御されるようになっている。Further, an electromagnetic on-off valve (shutoff valve) 12 is provided on the downstream side of the orifice 9. The electromagnetic opening / closing valve 12 is connected to the control unit 11, and the opening / closing operation is controlled by the control unit 11.
【００２２】また、電磁開閉弁１２の下流側には中間タ
ンク１３が設けられている。この中間タンク１３には圧
力センサ１４が接続されている。この圧力センサ１４は
制御部１１に電気的に接続されている。さらに、中間タ
ンク１３の下流側には圧力スイッチ１５が設けられてい
る。この圧力スイッチ１５の下流側にはガス出口１６が
設けられている。An intermediate tank 13 is provided downstream of the electromagnetic opening / closing valve 12. A pressure sensor 14 is connected to the intermediate tank 13. The pressure sensor 14 is electrically connected to the control unit 11. Further, a pressure switch 15 is provided on the downstream side of the intermediate tank 13. A gas outlet 16 is provided downstream of the pressure switch 15.
【００２３】また、１７は注入具である。この注入具１
７には送気チューブ１８の一端部が接続されている。こ
の送気チューブ１８の他端部はガス出口１６に接続され
ている。さらに、注入具１７の先端は人体の腹壁１９を
介して腹腔内に刺入されている。Numeral 17 is an injection tool. This injection tool 1
One end of an air supply tube 18 is connected to 7. The other end of the air supply tube 18 is connected to the gas outlet 16. Furthermore, the tip of the injection tool 17 is inserted into the abdominal cavity through the abdominal wall 19 of the human body.
【００２４】そして、人体の腹腔内に拡張用の気腹ガス
を供給する気腹動作時には中間タンク１３内への送気停
止時に圧力センサ１４によって検出される中間タンク１
３の圧力降下特性にもとづいて腹腔内圧を測定し、この
測定結果にもとづいて制御部１１によって電磁開閉弁１
２を開閉制御して気腹ガスの送気制御を行なうようにな
っている。The intermediate tank 1 which is detected by the pressure sensor 14 when the air supply to the intermediate tank 13 is stopped during the insufflation operation for supplying the insufflation gas for expansion into the abdominal cavity of the human body.
The abdominal pressure is measured based on the pressure drop characteristic of No. 3, and the control unit 11 controls the electromagnetic on-off valve 1 based on the measurement result.
2 is controlled to be opened and closed to control insufflation gas supply.
【００２５】次に、上記構成の作用について説明する。
まず、気腹動作時には高圧ボンベ４から送気管路２内に
ＣＯ2 の高圧ガスが供給される。このときの高圧ガスの
圧力値はボンベ圧センサ５により表示される。そして、
この高圧ガスは１次減圧器６により約３ｂａｒに減圧さ
れる。Next, the operation of the above configuration will be described.
First, during the pneumoperitoneum operation, a high-pressure gas of CO 2 is supplied from the high-pressure cylinder 4 into the air supply conduit 2. The pressure value of the high-pressure gas at this time is displayed by the cylinder pressure sensor 5. And
This high-pressure gas is decompressed by the primary decompressor 6 to about 3 bar.
【００２６】なお、このとき１次減圧器６の故障により
正常に減圧が行われない場合（例えば５ｂａｒ以上の高
圧ガスが流れる場合）にはリリーフ弁７により高圧ガス
は逃がされて安全が確保される。そして、１次減圧器６
で約３ｂａｒに減圧された高圧ガスは続いて２次減圧器
８により５０〜１００ｍｍＨｇに減圧される。At this time, when the pressure reduction is not normally performed due to the failure of the primary pressure reducer 6 (for example, when the high pressure gas of 5 bar or more flows), the relief valve 7 allows the high pressure gas to escape to ensure safety. To be done. And the primary pressure reducer 6
The high-pressure gas, which has been depressurized to about 3 bar in step 1, is subsequently depressurized to 50 to 100 mmHg by the secondary depressurizer 8.
【００２７】さらに、送気管路２内のガスの流れによ
る、オリフィス９の前後に発生する差圧を差圧センサ１
０により測定し、この測定値にもとづいて制御部１１に
よって演算を行ない、ガスの流量が求められる。求めら
れたガス流量は図示しない表示装置に表示される。Furthermore, the differential pressure sensor 1 detects the differential pressure generated before and after the orifice 9 due to the flow of gas in the gas supply line 2.
The flow rate of the gas is obtained by measuring the value of 0 and performing a calculation by the control unit 11 based on the measured value. The calculated gas flow rate is displayed on a display device (not shown).
【００２８】また、電磁開閉弁１２の動作と中間タンク
１３に充填される充填ガスの圧力、及び送気管路２内を
流れる流量の関係を図２の電磁開閉弁１２の動作と中間
タンク１３の圧力変化を表すタイムチャートを用いて説
明する。The relationship between the operation of the electromagnetic opening / closing valve 12, the pressure of the filling gas with which the intermediate tank 13 is filled, and the flow rate of the gas flowing in the air supply conduit 2 are shown in FIG. This will be described using a time chart showing pressure changes.
【００２９】なお、図２の（ａ）は電磁開閉弁１２のＯ
Ｎ／ＯＦＦ動作と経過時間の関係、同図の（ｂ）は中間
タンク１３内の圧力変化と経過時間との関係、同図の
（ｃ）は管路２を流れるＣＯ2 ガスの流量と経過時間と
の関係をそれぞれ表わす。Incidentally, FIG. 2A shows the O of the solenoid on-off valve 12.
The relationship between the N / OFF operation and the elapsed time, (b) of the figure shows the relationship between the pressure change in the intermediate tank 13 and the elapsed time, and (c) of the figure shows the flow rate of the CO 2 gas flowing through the pipeline 2 and the elapsed time. Represents the relationship with time.
【００３０】まず、時刻ｔ1 でスタートスイッチをＯＮ
にすると電磁開閉弁１２が開操作される。そのため、高
圧ガスボンベ４側から１次減圧器６、２次減圧器８を順
次介して減圧された送気ガスが中間タンク１３内に供給
され、中間タンク１３の圧力が上昇する。そして、この
中間タンク１３から送気チューブ１８を介して注入具１
７側に送気ガスが供給され、その流量値が上昇する。First, at time t 1 , the start switch is turned on.
When this is set, the electromagnetic opening / closing valve 12 is opened. Therefore, the air-supply gas whose pressure is reduced from the high-pressure gas cylinder 4 side through the primary pressure reducer 6 and the secondary pressure reducer 8 is supplied into the intermediate tank 13, and the pressure in the intermediate tank 13 rises. Then, the injection device 1 is inserted from the intermediate tank 13 through the air supply tube 18.
Gas is supplied to the 7 side, and the flow rate value thereof increases.
【００３１】また、一定時間（例えば４秒）後の時刻ｔ
2 に電磁開閉弁１２をＯＦＦすると、電磁開閉弁１２が
閉操作される。そのため、高圧ガスボンベ４側から中間
タンク１３内への送気ガスの供給が停止されるので、高
圧ガスボンベ４のタンク圧は下降し始め、この中間タン
ク１３から送気チューブ１８を介して注入具１７側に供
給される送気ガスの流量もこれに伴い低下する。この時
の中間タンク１３の圧力変化を圧力センサ１４によって
同じ時間間隔でＰａ，Ｐｂ，Ｐｃの３点で測定し、この
値から腹腔内圧力を演算する。At a time t after a fixed time (for example, 4 seconds)
When the electromagnetic on-off valve 12 is turned off to 2 , the electromagnetic on-off valve 12 is closed. Therefore, the supply of the air supply gas from the high-pressure gas cylinder 4 side to the inside of the intermediate tank 13 is stopped, so that the tank pressure of the high-pressure gas cylinder 4 starts to decrease, and the injector 17 is supplied from the intermediate tank 13 via the air supply tube 18. The flow rate of the air supply gas supplied to the side also decreases accordingly. The pressure change of the intermediate tank 13 at this time is measured by the pressure sensor 14 at the same time intervals at three points Pa, Pb, and Pc, and the abdominal pressure is calculated from this value.
【００３２】更に、一定時間（例えば０．５秒）の経過
後のｔ3 時点で再び電磁開閉弁１２をＯＮにして送気を
行う。以降、このように送気と腹腔内圧力測定とを交互
に繰り返す。このとき、圧力センサ１４による測定値が
予め設定された腹腔圧に近づくにしたがって電磁開閉弁
１２のＯＮの時間を順次短くし、圧力センサ１４による
測定値が設定腹腔圧に達した時点で電磁開閉弁１２をＯ
ＦＦ操作して送気を停止する。Further, the electromagnetic on-off valve 12 is turned on again at the time point t 3 after the elapse of a fixed time (for example, 0.5 seconds) to perform the air supply. Thereafter, insufflation and measurement of intraperitoneal pressure are alternately repeated in this manner. At this time, as the measured value by the pressure sensor 14 approaches the preset abdominal pressure, the ON / OFF time of the electromagnetic opening / closing valve 12 is sequentially shortened, and the electromagnetic opening / closing is performed when the measured value by the pressure sensor 14 reaches the set abdominal pressure. Valve 12 O
FF operation is performed to stop air supply.
【００３３】また、２次減圧器８の故障等により、送気
管路２内の圧力が上昇した場合には圧力センサ１４によ
る測定値が５０ｍｍＨｇ以上に達した時点で圧力スイッ
チ１５によって強制的に電磁開閉弁１２が遮断されて患
者の安全が確保される。When the pressure in the air supply line 2 rises due to a failure of the secondary decompressor 8 or the like, when the value measured by the pressure sensor 14 reaches 50 mmHg or more, the pressure switch 15 forces the electromagnetic force. The on-off valve 12 is shut off to ensure patient safety.
【００３４】そこで、上記構成のものにあっては気腹動
作時には電磁開閉弁１２を開放した状態でも中間タンク
１３から送気チューブ１８を介して注入具１７側に送気
ガスの供給が行なわれ、電磁開閉弁１２を閉じた際の中
間タンク１３の圧力変化を測定することにより腹腔圧測
定を行うようにしたので、従来に比べて高流量の送気動
作を行なうことができ、気腹時間を短縮することができ
る。Therefore, in the above-mentioned structure, the air supply gas is supplied from the intermediate tank 13 to the injector 17 side through the air supply tube 18 even when the electromagnetic on-off valve 12 is opened during the pneumoperitoneum operation. Since the abdominal pressure measurement is performed by measuring the pressure change in the intermediate tank 13 when the electromagnetic opening / closing valve 12 is closed, it is possible to perform a high flow rate insufflation operation as compared with the conventional method, and the insufflation time. Can be shortened.
【００３５】また、中間タンク１３を１個しか必要とし
ないために、装置全体の構成を簡略化することができる
ので、コスト低下を図ることができ、コンパクトな装置
を実現できる。Further, since only one intermediate tank 13 is required, the structure of the entire apparatus can be simplified, so that the cost can be reduced and a compact apparatus can be realized.
【００３６】さらに、気腹作業中、圧力センサ１４によ
る測定値が予め設定された腹腔圧に近づくにしたがって
電磁開閉弁１２のＯＮの時間を順次短くし、圧力センサ
１４による測定値が設定腹腔圧に達した時点で電磁開閉
弁１２をＯＦＦ操作して送気を停止するようにしたの
で、腹腔内を目的の状態まで精度よく正確に拡張させる
ことができる。Further, during the pneumoperitoneum, as the measured value by the pressure sensor 14 approaches the preset abdominal pressure, the ON time of the electromagnetic on-off valve 12 is gradually shortened, and the measured value by the pressure sensor 14 is set by the abdominal pressure. At this point, the electromagnetic on-off valve 12 is turned off to stop the air supply, so that the abdominal cavity can be accurately and accurately expanded to a desired state.
【００３７】また、図３および図４は本発明の第２実施
例を示すものである。本実施例は図３に示すように気腹
装置１の送気管路２に容量が異なる２個の中間タンク２
１、２２を並列に接続したものである。以下、第１実施
例と異なる点のみを説明する。3 and 4 show a second embodiment of the present invention. In this embodiment, as shown in FIG. 3, two intermediate tanks 2 having different capacities are provided in the air supply conduit 2 of the pneumoperitoneum device 1.
1, 22 are connected in parallel. Only the points different from the first embodiment will be described below.
【００３８】この場合、送気管路２における２次減圧器
８の下流側で、圧力スイッチ１５の上流側には一対の分
岐管路２３と２６とが接続されている。そして、一方の
第１の分岐管路２３に第１の中間タンク２１が介設さ
れ、他方の第２の分岐管路２６に第１の中間タンク２１
より大きな容積（例えば２倍）に設定された第２の中間
タンク２２が介設されている。In this case, a pair of branch lines 23 and 26 are connected to the air supply line 2 downstream of the secondary pressure reducer 8 and upstream of the pressure switch 15. Then, the first intermediate tank 21 is provided in one of the first branch pipelines 23, and the first intermediate tank 21 is provided in the other second branch pipeline 26.
A second intermediate tank 22 having a larger volume (for example, twice) is provided.
【００３９】また、第１の分岐管路２３には第１の中間
タンク２１の上流側の流路に第１の入口弁（電磁開閉
弁）２４および下流側の流路に第１の出口弁（電磁開閉
弁）２５がそれぞれ介設されている。In the first branch pipe line 23, a first inlet valve (electromagnetic on-off valve) 24 is provided in the upstream flow passage of the first intermediate tank 21, and a first outlet valve is provided in the downstream flow passage. (Electromagnetic on-off valves) 25 are provided respectively.
【００４０】さらに、第２の分岐管路２６には第２の中
間タンク２２の上流側の流路に第２の入口弁（電磁開閉
弁）２７および下流側の流路に第２の出口弁（電磁開閉
弁）２８がそれぞれ介設されている。Further, in the second branch pipeline 26, a second inlet valve (electromagnetic on-off valve) 27 is provided in the upstream flow passage of the second intermediate tank 22, and a second outlet valve is provided in the downstream flow passage. (Electromagnetic on-off valves) 28 are respectively provided.
【００４１】また、第１の中間タンク２１には第１の圧
力センサ２９、第２の中間タンク２２には第２の圧力セ
ンサ３０がそれぞれ接続されている。そして、以上の各
電磁開閉弁（第１の入口弁２４、第１の出口弁２５、第
２の入口弁２７、第２の出口弁２８）、及び、第１の圧
力センサ２９、第２の圧力センサ３０は全て電気的に制
御部（コントローラ）１１に接続されている。A first pressure sensor 29 is connected to the first intermediate tank 21, and a second pressure sensor 30 is connected to the second intermediate tank 22. Then, each of the above electromagnetic on-off valves (the first inlet valve 24, the first outlet valve 25, the second inlet valve 27, the second outlet valve 28), the first pressure sensor 29, and the second All the pressure sensors 30 are electrically connected to the control unit (controller) 11.
【００４２】さらに、第１の出口弁２５の下流側の分岐
管路２３と、第２の出口弁２８の下流側の分岐管路２６
とは合流し、ガス出口１６に至る。そして、制御部１１
によって第１の中間タンク２１の上流側の入口弁２４を
開状態、下流側の出口弁２５を閉状態に切換えた（或い
は第２の中間タンク２２の上流側の入口弁２７を開状
態、下流側の出口弁２８を閉状態に切換えた）気腹ガス
の充填動作と、第１の中間タンク２１の上流側の入口弁
２４を閉状態、下流側の出口弁２５を開状態に切換えた
（或いは第２の中間タンク２２の上流側の入口弁２７を
閉状態、下流側の出口弁２８を開状態に切換えた）気腹
ガスの供給動作とを各中間タンク２１、２２毎に位相を
ずらした状態で制御するようになっている。Furthermore, the branch pipe line 23 on the downstream side of the first outlet valve 25 and the branch pipe line 26 on the downstream side of the second outlet valve 28.
Joins and reaches the gas outlet 16. Then, the control unit 11
The inlet valve 24 on the upstream side of the first intermediate tank 21 is switched to the open state and the outlet valve 25 on the downstream side is switched to the closed state (or the inlet valve 27 on the upstream side of the second intermediate tank 22 is opened, Side outlet valve 28 is switched to a closed state), the insufflation gas filling operation, the upstream inlet valve 24 of the first intermediate tank 21 is switched to a closed state, and the downstream outlet valve 25 is switched to an open state ( Or, the inlet valve 27 on the upstream side of the second intermediate tank 22 is closed and the outlet valve 28 on the downstream side is switched to the open state) and the gas supply operation of the pneumoperitoneum is shifted in phase for each intermediate tank 21, 22. It is designed to be controlled in a closed state.
【００４３】次に、上記構成の作用について図４を参照
して説明する。なお、図４の（ａ）は第１の中間タンク
２１および第２の中間タンク２２内の圧力変化と経過時
間の関係を表し、実線は第１の中間タンク２１の動作、
また破線は第２の中間タンク２２の動作を表す。また、
図４の（ｂ）は同時刻のガス出口１６におけるガス流量
を表す。Next, the operation of the above configuration will be described with reference to FIG. 4A shows the relationship between the change in pressure in the first intermediate tank 21 and the second intermediate tank 22 and the elapsed time, and the solid line represents the operation of the first intermediate tank 21.
The broken line represents the operation of the second intermediate tank 22. Also,
FIG. 4B shows the gas flow rate at the gas outlet 16 at the same time.
【００４４】始めに、第１の中間タンク２１および第２
の中間タンク２２内の圧力の変化について説明する。ま
ず、時刻ｔ1 では既に第２の中間タンク２２は充填され
た状態である。このとき、第１の中間タンク２１のタン
ク内圧力は送気後の低圧力状態となっている。First, the first intermediate tank 21 and the second intermediate tank 21
The change in the pressure in the intermediate tank 22 will be described. First, at time t 1 , the second intermediate tank 22 is already filled. At this time, the tank internal pressure of the first intermediate tank 21 is in a low pressure state after air supply.
【００４５】この状態で、第２の中間タンク２２の上流
側の第２の入口弁２７を閉状態、下流側の出口弁２８を
開状態に切換えることにより、第２の中間タンク２２内
に充填されたガスが送気チューブ１８を介して注入具１
７側に供給され、気腹ガスの供給動作が行なわれる。こ
のとき、第１の中間タンク２１は上流側の入口弁２４が
開状態、下流側の出口弁２５が閉状態に切換えられ、こ
の状態で気腹ガスの充填動作が行なわれる。In this state, the second inlet valve 27 on the upstream side of the second intermediate tank 22 is closed and the outlet valve 28 on the downstream side is switched to the open state to fill the second intermediate tank 22. The injected gas is injected through the air supply tube 18 into the injection tool 1
The gas is supplied to the No. 7 side, and a pneumoperitoneum gas supply operation is performed. At this time, in the first intermediate tank 21, the inlet valve 24 on the upstream side is switched to the open state and the outlet valve 25 on the downstream side is switched to the closed state, and the insufflation gas filling operation is performed in this state.
【００４６】さらに、第２の中間タンク２２からの気腹
ガスの供給動作と第１の中間タンク２１への気腹ガスの
充填動作とが進むと第１の中間タンク２１はガスが充填
された状態、第２の中間タンク２２のタンク内圧力は送
気後の低圧力状態にそれぞれ切換わる。そして、時刻ｔ
2 で、ガスが充填された第１の中間タンク２１側が気腹
ガスの供給動作状態、第２の中間タンク２２側が気腹ガ
スの充填動作状態に切換わる。Further, when the operation of supplying the pneumoperitoneum gas from the second intermediate tank 22 and the operation of filling the pneumoperitoneum gas to the first intermediate tank 21 proceed, the first intermediate tank 21 is filled with the gas. The state and the tank internal pressure of the second intermediate tank 22 are switched to the low pressure state after the air supply. And time t
At 2 , the first intermediate tank 21 side filled with gas is switched to the pneumoperitoneum gas supply operation state, and the second intermediate tank 22 side is switched to the pneumoperitoneum gas filling operation state.
【００４７】また、腹腔圧力が設定値に近づくまで以上
の動作を繰り返しながら送気を行なう。そして、腹腔圧
力が設定値に近づくと、第１の中間タンク２１のみを用
いて充填、開放動作が行なわれる。このとき、腹腔圧力
と設定値との差により、ｔ4とｔ5 の間隔が調整され
る。Further, air is supplied while repeating the above operation until the abdominal pressure approaches the set value. Then, when the abdominal pressure approaches the set value, the filling and opening operations are performed using only the first intermediate tank 21. At this time, the interval between t 4 and t 5 is adjusted by the difference between the abdominal pressure and the set value.
【００４８】次に、流量の変化について述べる。時刻ｔ
1 からの流量変化は図４の（ｂ）の実線部で表される通
り、第２の中間タンク２２からの気腹ガスの供給動作の
開始と同時に最大流量値ｑ1 に達し、第２の中間タンク
２２内の圧力の降下に伴い徐々に低下する。Next, the change in flow rate will be described. Time t
The change in the flow rate from 1 reaches the maximum flow rate value q 1 at the same time as the start of the operation of supplying the pneumoperitoneum gas from the second intermediate tank 22 as indicated by the solid line portion in FIG. It gradually decreases as the pressure in the intermediate tank 22 decreases.
【００４９】そして、時刻ｔ2 では気腹ガスの供給流量
はｑ2 点まで低下する。時刻ｔ2 からは第１の中間タン
ク２１からの気腹ガスの供給動作の開始に伴い、再び気
腹ガスの供給流量は最大流量値ｑ3 に達する。さらに、
第１の中間タンク２１の圧力降下に伴い、流量は時刻ｔ
3 にはｑ4 点まで低下する。Then, at time t 2 , the supply flow rate of the pneumoperitoneum gas drops to q 2 . From time t 2, the supply flow rate of the pneumoperitoneum gas reaches the maximum flow rate value q 3 again with the start of the operation of supplying the pneumoperitoneum gas from the first intermediate tank 21. further,
Due to the pressure drop in the first intermediate tank 21, the flow rate changes to time t
In 3 it drops to q 4 points.
【００５０】この場合、第２の中間タンク２２の容量は
第１の中間タンク２１より大きな容積（例えば２倍）に
設定されているので、第１の中間タンク２１からの気腹
ガスの供給動作時の最低流量ｑ4 と、第２の中間タンク
２２からの気腹ガスの供給動作時の最低流量ｑ2 との間
に差が生じる。そして、第２の中間タンク２２からの気
腹ガスの供給動作時のガス流量は図４の（ｂ）中の斜線
部に示す面積分が多くなる。In this case, since the capacity of the second intermediate tank 22 is set to be larger than that of the first intermediate tank 21 (for example, twice), the operation of supplying the pneumoperitoneum gas from the first intermediate tank 21. a minimum flow rate q 4 when the difference between the minimum flow q 2 when the supply operation of pneumoperitoneum gas from the second intermediate tank 22 occurs. The gas flow rate during the operation of supplying the pneumoperitoneum gas from the second intermediate tank 22 is increased by the area indicated by the hatched portion in FIG. 4B.
【００５１】また、腹腔圧が設定値に近づくと前述の通
り気腹ガスの供給動作は第１の中間タンク２１のみによ
り行われる。このとき、第１の中間タンク２１は第２の
中間タンク２２より容量が小さい（例えば１／２）の
で、過送気とならず腹腔圧をオーバーしない適正な送気
が行なえる。When the abdominal pressure approaches the set value, the pneumoperitoneum gas supply operation is performed only by the first intermediate tank 21 as described above. At this time, since the capacity of the first intermediate tank 21 is smaller than that of the second intermediate tank 22 (for example, 1/2), proper air supply can be performed without excessive air supply and over abdominal pressure.
【００５２】そこで、上記構成のものにあっては第２の
中間タンク２２の容量を第１の中間タンク２１より大き
な容積（例えば２倍）に設定して第１の中間タンク２１
からの気腹ガスの供給動作時の最低流量と、第２の中間
タンク２２からの気腹ガスの供給動作時の最低流量との
間に差を設け、第２の中間タンク２２からの気腹ガスの
供給動作時のガス流量を図４の（ｂ）中の斜線部に示す
面積分が多くなるようにしたので、同容量の２個の中間
タンクを使用した場合に比べて高流量の送気動作を行な
うことができ、気腹時間を短縮することができる。Therefore, in the above-mentioned structure, the capacity of the second intermediate tank 22 is set to be larger than that of the first intermediate tank 21 (for example, twice), and the first intermediate tank 21 is set.
The minimum flow rate during the operation of supplying the pneumoperitoneum gas from the second intermediate tank 22 and the minimum flow rate during the operation of supplying the pneumoperitoneum gas from the second intermediate tank 22 are set to be different from each other. The gas flow rate during the gas supply operation was increased so that the area indicated by the shaded area in Fig. 4 (b) was increased, so that a higher flow rate than the case of using two intermediate tanks of the same capacity was used. It is possible to perform the qi motion and shorten the pneumoperitoneum time.
【００５３】さらに、腹腔圧が設定値に近づくと前述の
通り気腹ガスの供給動作は第２の中間タンク２２より容
量が小さい例えば１／２の容量の第１の中間タンク２１
のみにより行なうことができるので、過送気とならず腹
腔圧をオーバーしない適正な送気が行なえ、腹腔内を目
的の状態まで精度よく正確に拡張させることができる。Further, when the abdominal pressure approaches the set value, the operation of supplying the pneumoperitoneum gas is smaller than that of the second intermediate tank 22 as described above, for example, the first intermediate tank 21 having a half capacity.
Since it can be performed only by itself, proper insufflation that does not result in excessive insufflation and does not exceed the abdominal pressure can be performed, and the abdominal cavity can be accurately and accurately expanded to a desired state.
【００５４】また、図６は本発明の第３の実施例を示す
ものである。本実施例は第１実施例の気腹装置１の送気
管路２における中間タンク１３の下流側に第２の開閉弁
１２´を追加したものである。FIG. 6 shows a third embodiment of the present invention. In this embodiment, a second on-off valve 12 'is added downstream of the intermediate tank 13 in the air supply conduit 2 of the pneumoperitoneum device 1 of the first embodiment.
【００５５】次に、上記構成の作用について図６を参照
して説明する。なお、図６の（ａ）は電磁開閉弁１２の
ＯＮ／ＯＦＦ動作と経過時間との関係、同図の（ｂ）は
第２の電磁開閉弁１２´のＯＮ／ＯＦＦ動作と経過時間
との関係、同図の（ｃ）は中間タンク１３内の圧力変化
と経過時間との関係、同図の（ｄ）は送気管路２内を流
れるＣＯ2 ガスの流量と経過時間との関係をそれぞれ表
わす。Next, the operation of the above configuration will be described with reference to FIG. 6A shows the relationship between the ON / OFF operation of the electromagnetic on-off valve 12 and the elapsed time, and FIG. 6B shows the ON / OFF operation of the second electromagnetic on-off valve 12 'and the elapsed time. The relationship, (c) in the figure shows the relationship between the pressure change in the intermediate tank 13 and the elapsed time, and (d) in the figure shows the relationship between the flow rate of the CO 2 gas flowing in the air supply conduit 2 and the elapsed time. Represent.
【００５６】腹腔圧の測定動作は次の通りである。ま
ず、時刻ｔ1 でスタートスイッチをＯＮにすると電磁開
閉弁１２が開となり、中間タンク１３内のタンク圧は２
次減圧器８の減圧値（５０〜１００ｍｍＨｇ）まで上昇
する。The abdominal pressure measurement operation is as follows. First, when the start switch is turned on at time t 1 , the electromagnetic opening / closing valve 12 is opened, and the tank pressure in the intermediate tank 13 becomes 2
The pressure is increased to the pressure reduction value (50 to 100 mmHg) of the next pressure reducer 8.
【００５７】そして、圧力センサ１４によって中間タン
ク１３内のタンク圧が規定値（例えば９０ｍｍＨｇ）ま
で上昇した状態が検出された時点ｔ2 で、電磁開閉弁１
２を閉じ、第２の電磁開閉弁１２´を開く。この結果、
中間タンク１３内に充填されたガスが開放され、タンク
圧が下降する。At time t 2 when the pressure sensor 14 detects that the tank pressure in the intermediate tank 13 has risen to a specified value (for example, 90 mmHg), the solenoid opening / closing valve 1
2 is closed and the second solenoid on-off valve 12 'is opened. As a result,
The gas filled in the intermediate tank 13 is released, and the tank pressure drops.
【００５８】この時の中間タンク１３の圧力変化（下降
特性）を圧力センサ１４によってＰａ，Ｐｂ，Ｐｃの３
点で測定し、この値から制御部１１により腹腔圧を計算
する。上記測定点Ｐａ，Ｐｂ，Ｐｃの間隔は中間タンク
１３のタンク圧の降下特性より定まる。例えば、中間タ
ンク１３の充填圧を９０ｍｍＨｇとした場合、基準点１
を８０ｍｍＨｇ、基準点２を６０ｍｍＨｇにそれぞれ設
定する。そして、この基準点１の測定点Ｐａから基準点
２の測定点Ｐｂである６０ｍｍＨｇまで降下する時間を
測定し、この時間より、ＰａとＰｂとの間の間隔と等間
隔で、ＰｂとＰｃとの間の間隔を決定する。なお、時刻
ｔ3 で第２の電磁開閉弁１２´を閉じる事により、腹腔
圧の測定動作が終了する。At this time, the pressure change (lowering characteristic) of the intermediate tank 13 is detected by the pressure sensor 14 as 3 of Pa, Pb and Pc.
Measurement is performed at points, and the abdominal pressure is calculated by the control unit 11 from this value. The interval between the measurement points Pa, Pb and Pc is determined by the tank pressure drop characteristic of the intermediate tank 13. For example, when the filling pressure of the intermediate tank 13 is 90 mmHg, the reference point 1
Is set to 80 mmHg, and the reference point 2 is set to 60 mmHg. Then, the time to fall from the measurement point Pa of the reference point 1 to the measurement point Pb of the reference point 2 of 60 mmHg is measured, and from this time, Pb and Pc are equidistant with the interval between Pa and Pb. Determine the interval between. Incidentally, by closing the at time t 3 the second solenoid valve 12 ', the measurement operation of the abdominal cavity pressure is completed.
【００５９】また、腹腔圧が設定値に達していない場合
には次の送気動作が行なわれる。この送気動作では、時
刻ｔ4 で電磁開閉弁１２，１２´とも開操作し、ＣＯ2
ガスを腹腔内に送る。そして、時刻ｔ5 で電磁開閉弁１
２，１２´共閉じて送気を終了する。When the abdominal pressure does not reach the set value, the next air feeding operation is performed. In this air supply operation, at the time t 4 , both the solenoid on-off valves 12 and 12 ′ are opened and CO 2
Gas is delivered into the abdominal cavity. Then, at time t 5 , the solenoid on-off valve 1
2, 12 'are both closed and the air supply is completed.
【００６０】腹腔圧が設定値に達するまでは、この様に
腹腔圧測定と送気動作とを繰り返す。ここで、ｔ4 とｔ
5 との間隔は、腹腔圧と設定値との差により決まり、そ
の差が大きければ長く、その差が小さいと短くなる。そ
して、腹腔圧が設定値に達した時点で、電磁開閉弁１２
を閉じ、第２の電磁開閉弁１２´を開いて腹腔圧を監視
する動作となる。Until the abdominal pressure reaches the set value, the abdominal pressure measurement and the air feeding operation are repeated in this manner. Where t 4 and t
The interval with 5 is determined by the difference between the abdominal pressure and the set value, and the longer the difference, the shorter the difference. Then, when the abdominal pressure reaches the set value, the solenoid opening / closing valve 12
Is closed and the second electromagnetic on-off valve 12 'is opened to monitor the abdominal pressure.
【００６１】また、腹腔圧の監視動作中、腹腔圧が設定
値よりも下がった場合には、再び送気動作が再開され
る。なお、ｔ3 からｔ4 の間の動作は省略することも可
能である。If the abdominal pressure falls below the set value during the abdominal pressure monitoring operation, the air supply operation is restarted. The operation between t 3 and t 4 can be omitted.
【００６２】さらに、ｔ4 とｔ5 との間隔の最低値は中
間タンク１３に充填したガスを開放した際に腹腔内に流
れるガスの量（図６の（ｃ）におけるｔ2 からｔ2'の間
に流れる量）より、ｔ4 からｔ5 の間で流れるガスの量
が大きくなる様な値に設定されている。[0062] Further, t 4 and the lowest value of the interval between t 5 the amount of gas flowing into the abdominal cavity when the opening of the gas filled in the intermediate tank 13 (t 2 from t 2 in FIG. 6 (c) ' The amount of gas flowing between t 4 and t 5 is set to a value larger than the amount of gas flowing during t 4 ).
【００６３】そこで、上記構成のものにあっては中間タ
ンク１３の前後に電磁開閉弁１２，１２´を配して、一
旦中間タンク１３内を２次減圧器８の減圧値まで充填す
るようにしているので、内部通路の流路抵抗の大きさが
どのような値の注入具１７を接続した場合でも腹腔圧の
測定動作時における基準点１と２の間を所望の値に設定
することができ、第１実施例の場合に比べて精度の高い
測定が可能となる。Therefore, in the above-mentioned construction, the electromagnetic on-off valves 12 and 12 'are arranged before and after the intermediate tank 13 so that the inside of the intermediate tank 13 is once filled up to the reduced pressure value of the secondary pressure reducer 8. Therefore, it is possible to set a desired value between the reference points 1 and 2 during the abdominal pressure measurement operation, regardless of the value of the magnitude of the channel resistance of the internal passage to which the injector 17 is connected. Therefore, the measurement can be performed with higher accuracy than in the case of the first embodiment.
【００６４】ここで、第１実施例の場合には腹腔圧の測
定動作時における基準点１を低い値（例えば５０ｍｍＨ
ｇ）にする必要が生じることがあり、この場合には算出
した腹腔圧の精度が低下するおそれがある。Here, in the case of the first embodiment, the reference point 1 during the measurement operation of the abdominal pressure is set to a low value (for example, 50 mmH).
g) may be required, and in this case, the accuracy of the calculated abdominal pressure may be reduced.
【００６５】すなわち、図２において、ｔ2 時点より中
間タンク１３内のタンク圧は降下するが、このｔ2 時点
でのタンク圧は、ガスを流している間の中間タンク１３
内の圧力である。これは、主に注入具１７内の流れの抵
抗により、値が大きく変わる。[0065] That is, in FIG. 2, the tank pressure of the intermediate tank 13 from t 2 time but drops, tank pressure at the t 2 time, the intermediate tank 13 while flowing gas
Is the pressure inside. This largely changes in value mainly due to the flow resistance in the injection device 17.
【００６６】例えば、注入具１７内の流れの抵抗の小さ
い場合には中間タンク１３内のタンク圧は小さく、抵抗
の大きい場合には中間タンク１３内のタンク圧は大きく
なる。また、注入具１７内の流れの抵抗が小さい場合で
２次減圧器８の減圧値の設定値が１００ｍｍＨｇの場
合、ｔ2 時点での中間タンク１３内のタンク内圧は約５
０ｍｍＨｇとなり、例えば前記基準点１を５０ｍｍＨ
ｇ、基準点２を４０ｍｍＨｇに下げる必要が生じる。そ
のため、この場合には本実施例のように基準点１を８０
ｍｍＨｇ、基準点２を６０ｍｍＨｇに設定した場合に比
較して決定するＰａ，Ｐｂ，Ｐｃ間の間隔値の誤差が大
きくなるおそれがあるので、算出した腹腔圧の誤差が大
きくなることがある。For example, when the resistance of the flow in the injector 17 is small, the tank pressure in the intermediate tank 13 is small, and when the resistance is large, the tank pressure in the intermediate tank 13 is large. Further, when the flow resistance in the injection tool 17 is small and the set pressure reduction value of the secondary pressure reducer 8 is 100 mmHg, the tank internal pressure in the intermediate tank 13 at time t 2 is about 5
0 mmHg, for example, the reference point 1 is 50 mmHg
g, it is necessary to lower the reference point 2 to 40 mmHg. Therefore, in this case, the reference point 1 is set to 80 as in this embodiment.
Since the error in the interval value between Pa, Pb, and Pc, which is determined in comparison with the case where the mmHg and the reference point 2 are set to 60 mmHg, may increase, the error in the calculated abdominal pressure may increase.
【００６７】その結果、本実施例のように中間タンク１
３の前後に電磁開閉弁１２，１２´を配し、一旦中間タ
ンク１３内を２次減圧器８の減圧値まで充填することに
より、内部通路の流路抵抗の大きさがどのような値の注
入具１７を接続した場合でも腹腔圧の測定動作時におけ
る基準点１と２の間を所望の値に設定することができ、
精度の高い測定が可能となる。As a result, as in this embodiment, the intermediate tank 1
By arranging the solenoid on-off valves 12 and 12 'before and after 3, and once filling the inside of the intermediate tank 13 up to the depressurized value of the secondary depressurizer 8, the value of the flow passage resistance of the internal passage can be determined. Even when the injector 17 is connected, a desired value can be set between the reference points 1 and 2 during the measurement operation of the abdominal pressure,
Highly accurate measurement is possible.
【００６８】また、図７は第３実施例の変形例を示すも
のである。これは、一端部が気腹装置１の送気管路２に
おける電磁開閉弁１２の上流側に連結され、他端部が第
２の電磁開閉弁１２´の下流側に連結されたバイパス管
路４１を設け、このバイパス管路４１に第３の電磁開閉
弁４２を介設させたものである。FIG. 7 shows a modification of the third embodiment. This is a bypass conduit 41 whose one end is connected to the upstream side of the electromagnetic on-off valve 12 in the air supply conduit 2 of the insufflation device 1 and whose other end is connected to the downstream side of the second electromagnetic on-off valve 12 '. Is provided, and the third electromagnetic opening / closing valve 42 is provided in the bypass conduit 41.
【００６９】ここで、バイパス管路４１は送気管路２の
主通路に比べて高流量に設定されている。例えば、バイ
パス管路４１の流量は１６ｌ／min.、送気管路２の主通
路の流量は２ｌ／min.に設定されている。この場合、電
磁開閉弁１２，４２内の絞りにより、各管路２，４１の
流量が設定されている。なお、バイパス通路４１の上流
側の連結端部と２次減圧器８との間には流量計４３が介
設されている。Here, the bypass conduit 41 is set to have a higher flow rate than the main conduit of the air supply conduit 2. For example, the flow rate of the bypass conduit 41 is set to 16 l / min., And the flow rate of the main passage of the air feeding conduit 2 is set to 2 l / min. In this case, the flow rate of each of the pipelines 2 and 41 is set by the throttle in the electromagnetic on-off valves 12 and 42. A flow meter 43 is provided between the upstream connection end of the bypass passage 41 and the secondary pressure reducer 8.
【００７０】次に、上記構成の作用について説明する。
まず、前述の腹腔圧測定動作（図６中のｔ1 〜ｔ3 の動
作）は送気管路２の主通路側で行なわれる。さらに、図
６中のｔ4 からｔ5 の動作はバイパス管路４１と送気管
路２の主通路とを切換えて行なわれる。すなわち、腹腔
圧と設定圧との差が大きい場合には高速で送気する必要
があるため、バイパス管路４１が選択される。この場合
には図６の（ｄ）中のＱの値が１６ｌ／min.となる。Next, the operation of the above configuration will be described.
First, the above-described abdominal pressure measurement operation (operations t 1 to t 3 in FIG. 6) is performed on the main passage side of the air supply conduit 2. Further, the operation from t 4 to t 5 in FIG. 6 is performed by switching the bypass conduit 41 and the main conduit of the air supply conduit 2. That is, when the difference between the abdominal pressure and the set pressure is large, it is necessary to supply air at high speed, so the bypass conduit 41 is selected. In this case, the value of Q in FIG. 6 (d) is 16 l / min.
【００７１】また、腹腔圧と設定圧との圧力差が小さい
場合には腹腔圧が設定値を超えることを防止するために
流量を落とす必要があり、送気管路２の主通路側が選択
される。この場合には図６の（ｄ）中のＱの値が２ｌ／
min.となる。When the pressure difference between the abdominal pressure and the set pressure is small, it is necessary to reduce the flow rate in order to prevent the abdominal pressure from exceeding the set value, and the main passage side of the air supply conduit 2 is selected. . In this case, the value of Q in FIG.
It will be min.
【００７２】そこで、上記構成のものにあっては送気管
路２の主通路に比べて高流量に設定されたバイパス管路
４１を設け、必要に応じて送気管路２の主通路とバイパ
ス管路４１とを切換えて使用可能にしたので、中間タン
ク１３の圧力降下による流量低下の度合いを低減して気
腹時間を短縮することができるとともに、腹腔内を目的
の状態まで精度よく正確に拡張させることができ、より
高速で精度の高い気腹が可能となる。Therefore, in the above-described structure, the bypass conduit 41 having a flow rate set higher than that of the main conduit of the air supplying conduit 2 is provided, and the main conduit of the air supplying conduit 2 and the bypass conduit are provided as necessary. Since the passage 41 is switched to be usable, the degree of flow reduction due to the pressure drop of the intermediate tank 13 can be reduced to shorten the pneumoperitoneum, and the abdominal cavity can be accurately and accurately expanded to a target state. The pneumoperitoneum can be performed at higher speed and with higher accuracy.
【００７３】なお、本実施例では送気管路２の主通路に
１本のバイパス管路４１を連結した硬性のものを示した
が、送気管路２の主通路に複数本、例えば２本のバイパ
ス管路を連結し、第１のバイパス管路の流量を１６ｌ／
min.、第２のバイパス管路の流量を８ｌ／min.、送気管
路２の主通路の流量を２ｌ／min.にそれぞれ設定して更
に効果を上げる構成にしても良い。さらに、流量計４３
は熱式の質量流量計を用いることも可能である。In the present embodiment, the hard passage in which one bypass pipe 41 is connected to the main passage of the air supply pipe 2 is shown, but a plurality of, for example, two, main passages of the air supply pipe 2 are shown. By connecting the bypass lines, the flow rate of the first bypass line is 16 l /
The effect may be further improved by setting the flow rate of the second bypass pipeline to 8 l / min and the flow rate of the main passage of the air supply pipeline 2 to 2 l / min. Furthermore, the flow meter 43
It is also possible to use a thermal mass flow meter.
【００７４】また、本発明は上記実施例に限定されるも
のではない。例えば、第２の実施例のように第１の中間
タンク２１の容量と第２の中間タンク２２の容量とに差
を設ける代わりに、充填圧力に差を設ける（例えば第１
の中間タンク２１の充填圧は５０ｍｍＨｇ、第２の中間
タンク２２は１００ｍｍＨｇ）構成にしても同様の効果
を実現できる。The present invention is not limited to the above embodiment. For example, instead of providing the difference between the capacity of the first intermediate tank 21 and the capacity of the second intermediate tank 22 as in the second embodiment, a difference is provided in the filling pressure (for example, the first intermediate tank 21).
Even if the filling pressure of the intermediate tank 21 is 50 mmHg and the second intermediate tank 22 is 100 mmHg, the same effect can be realized.
【００７５】また、第１の中間タンク２１と第２の中間
タンク２２の圧力は同じにし、高速送気が必要な際に
は、両者共高圧で充填し、腹腔圧が設定値に近づいた状
態で、両者共低圧で充填することにより、より効率的な
気腹が実現できる。ここで、充填圧の調節は例えば入口
弁２４、２７の開時間を変化させて行なう。さらに、そ
の他本発明の要旨を逸脱しない範囲で種々変形実施でき
ることは勿論である。Further, the first intermediate tank 21 and the second intermediate tank 22 have the same pressure, and when high-speed air supply is required, both are filled with high pressure and the abdominal pressure approaches the set value. By filling both with low pressure, more efficient pneumoperitoneum can be realized. Here, the filling pressure is adjusted by changing the opening time of the inlet valves 24 and 27, for example. Furthermore, it goes without saying that various modifications can be made without departing from the scope of the present invention.
【００７６】[0076]
【発明の効果】中間タンクの圧力降下による流量の低下
をなくして、気腹時間を短縮することができるととも
に、腹腔内を目的の状態まで精度よく正確に拡張させる
ことができる。The pneumoperitoneum time can be shortened by eliminating the decrease in the flow rate due to the pressure drop in the intermediate tank, and the inside of the abdominal cavity can be accurately and accurately expanded to the intended state.
【図１】 本発明の第１実施例の気腹装置の概略構成
図。FIG. 1 is a schematic configuration diagram of a pneumoperitoneum device according to a first embodiment of the present invention.
【図２】 第１実施例の気腹装置の動作を説明するため
の特性図。FIG. 2 is a characteristic diagram for explaining the operation of the pneumoperitoneum device of the first embodiment.
【図３】 本発明の第２実施例の気腹装置の概略構成
図。FIG. 3 is a schematic configuration diagram of a pneumoperitoneum device of a second embodiment of the present invention.
【図４】 第２実施例の気腹装置の動作を説明するため
の特性図。FIG. 4 is a characteristic diagram for explaining the operation of the pneumoperitoneum device of the second embodiment.
【図５】 本発明の第３実施例の気腹装置の概略構成
図。FIG. 5 is a schematic configuration diagram of a pneumoperitoneum device according to a third embodiment of the present invention.
【図６】 第３実施例の気腹装置の動作を説明するため
の特性図。FIG. 6 is a characteristic diagram for explaining the operation of the pneumoperitoneum device of the third embodiment.
【図７】 第３実施例の変形例を示す要部の概略構成
図。FIG. 7 is a schematic configuration diagram of a main part showing a modified example of the third embodiment.
【図８】 従来の気腹装置の動作を説明するための特性
図。FIG. 8 is a characteristic diagram for explaining the operation of a conventional pneumoperitoneum device.
２…送気管路、４…高圧ガスボンベ（供給源）、１１…
制御部（コントローラ）、１２…開閉弁（締切弁）、１
３…中間タンク、２１…第１の中間タンク、２２…第２
の中間タンク、２４、２７…入口弁（開閉弁）、２５、
２８…出口弁（開閉弁）。2 ... Air supply line, 4 ... High-pressure gas cylinder (supply source), 11 ...
Control unit (controller), 12 ... open / close valve (shutoff valve), 1
3 ... Intermediate tank, 21 ... First intermediate tank, 22 ... Second
Intermediate tank, 24, 27 ... Inlet valve (open / close valve), 25,
28 ... Outlet valve (open / close valve).
Claims (2)
路中に中間タンクを設け、この中間タンクを介して腹腔
内に拡張用の気腹ガスを供給するとともに、前記中間タ
ンク内に充填されたガスが放出される際の前記中間タン
クの圧力降下特性にもとづいて腹腔内圧を測定して前記
気腹ガスの送気制御を行なう気腹装置において、前記送
気管路における前記中間タンクの少なくとも上流側１箇
所に設けられた締切弁と、同一圧力、同一温度下で比較
した場合の、前記中間タンクを通過するガスの量が、前
記中間タンクの容量より大きくなるように、前記締切弁
の一回の開通時間を制御するコントローラとを設けたこ
とを特徴とする気腹装置。1. An intermediate tank is provided in an air supply conduit for high-pressure gas supplied from a supply source, and a pneumoperitoneum gas for expansion is supplied into the abdominal cavity through the intermediate tank and is filled in the intermediate tank. In the abdominal cavity device for measuring the intraperitoneal pressure based on the pressure drop characteristic of the intermediate tank when the gas is released, and controlling the insufflation of the insufflation gas, at least the intermediate tank in the insufflation pipe line. In order to make the amount of gas passing through the intermediate tank larger than the capacity of the intermediate tank when compared with the shutoff valve provided at one upstream side under the same pressure and the same temperature, A pneumoperitoneum device, which is provided with a controller that controls a single opening time.
路中に中間タンクを設け、この中間タンクを介して腹腔
内に拡張用の気腹ガスを供給するとともに、前記中間タ
ンク内に充填されたガスが放出される際の前記中間タン
クの圧力降下特性にもとづいて腹腔内圧を測定して前記
気腹ガスの送気制御を行なう気腹装置において、前記送
気管路に容量が異なる複数の中間タンクを並列に接続
し、各中間タンクの上流側および下流側の各流路にそれ
ぞれ開閉弁を介設するとともに、前記各中間タンクの上
流側の開閉弁を開状態、下流側の開閉弁を閉状態に切換
えた気腹ガスの充填動作と、前記各中間タンクの上流側
の開閉弁を閉状態、下流側の開閉弁を開状態に切換えた
気腹ガスの供給動作とを前記各中間タンク毎に位相をず
らした状態で制御するコントローラを設けたことを特徴
とする気腹装置。2. An intermediate tank is provided in a gas supply line for high-pressure gas supplied from a supply source, and a pneumoperitoneum gas for expansion is supplied into the abdominal cavity through the intermediate tank and is filled in the intermediate tank. In the pneumoperitoneum device for controlling the insufflation of the insufflation gas by measuring the abdominal pressure based on the pressure drop characteristic of the intermediate tank when the released gas is released, a plurality of capacities different in the insufflation conduit are provided. The intermediate tanks are connected in parallel, and an opening / closing valve is provided in each of the upstream and downstream flow paths of each intermediate tank, and the upstream opening / closing valve of each intermediate tank is opened, and the downstream opening / closing valve is opened. The operation of filling the insufflation gas in which each of the intermediate tanks is switched to the closed state and the operation of supplying the insufflation gas in which the upstream opening / closing valve of each intermediate tank is closed and the downstream opening / closing valve is opened Control with the phase shifted for each tank A pneumoperitoneum device having a controller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5114837A JP2544881B2 (en) | 1992-06-30 | 1993-05-17 | Pneumoperitoneum |
| US08/312,503 US5476447A (en) | 1983-06-28 | 1994-09-26 | Intraperitoneal therapy apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-172605 | 1992-06-30 | ||
| JP17260592 | 1992-06-30 | ||
| JP5114837A JP2544881B2 (en) | 1992-06-30 | 1993-05-17 | Pneumoperitoneum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0670936A JPH0670936A (en) | 1994-03-15 |
| JP2544881B2 true JP2544881B2 (en) | 1996-10-16 |
Family
ID=26453499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5114837A Expired - Fee Related JP2544881B2 (en) | 1983-06-28 | 1993-05-17 | Pneumoperitoneum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2544881B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007014475A (en) * | 2005-07-06 | 2007-01-25 | Fujinon Corp | Balloon control device for endoscope apparatus |
| JP2013117210A (en) * | 2011-12-05 | 2013-06-13 | Denso Corp | Fuel injection device for internal combustion engine |
| JP6057658B2 (en) * | 2012-10-16 | 2017-01-11 | オリンパス株式会社 | Air supply device |
| CN108685607B (en) * | 2018-06-15 | 2024-02-02 | 首都医科大学附属北京世纪坛医院 | Special constant temperature pneumoperitoneum system of tumour surgery |
| JP7187671B2 (en) * | 2019-03-20 | 2022-12-12 | オリンパス株式会社 | Air supply device, air supply amount control method, and air supply system |
-
1993
- 1993-05-17 JP JP5114837A patent/JP2544881B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0670936A (en) | 1994-03-15 |
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