JPH05329098A - Pneumoperitoneum device - Google Patents
Pneumoperitoneum deviceInfo
- Publication number
- JPH05329098A JPH05329098A JP4139434A JP13943492A JPH05329098A JP H05329098 A JPH05329098 A JP H05329098A JP 4139434 A JP4139434 A JP 4139434A JP 13943492 A JP13943492 A JP 13943492A JP H05329098 A JPH05329098 A JP H05329098A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- abdominal
- gas
- solenoid valve
- pneumoperitoneum
- 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.)
- Granted
Links
- 208000005646 Pneumoperitoneum Diseases 0.000 title claims abstract description 45
- 210000000683 abdominal cavity Anatomy 0.000 claims abstract description 40
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 230000003187 abdominal effect Effects 0.000 abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 12
- 238000009530 blood pressure measurement Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000012937 correction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000007912 intraperitoneal administration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Endoscopes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、腹腔内における医療処
置に必要な観察視野を確保するために、処置する腹腔内
に気体を注入してこの腹腔内部位を拡張させる気腹装置
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 cavity to be inflated to secure an observation visual field necessary for medical treatment in the abdominal cavity.
【０００２】[0002]
【従来の技術】従来、腹腔内において例えば内視鏡観察
下で医療処置を行なう場合には、処置する腹腔内に炭酸
ガス等の気体を注入してこの腹腔内部位を拡張させ、腹
腔内処置に必要な観察視野を確保して、処置過程を十分
に把握できるようにしている。腹腔内への気体の注入に
は、ガスボンベ等の気体供給源からの気体を減圧器や弁
などによって圧力制御して腹腔内を設定圧力に保つ気腹
装置が使用される。2. Description of the Related Art Conventionally, when medical treatment is performed in the abdominal cavity under observation with an endoscope, for example, a gas such as carbon dioxide gas is injected into the abdominal cavity to be expanded to expand the abdominal cavity. The necessary observation field of view is secured so that the treatment process can be fully understood. For injecting gas into the abdominal cavity, a pneumoperitoneum device is used, which keeps the abdominal cavity at a set pressure by controlling the pressure of gas from a gas supply source such as a gas cylinder with a decompressor or a valve.
【０００３】このような気腹装置は、例えばドイツ特許
公開公報３０００２１８号、ドイツ特許公開公報３６１
１０１８号に開示されている。Such a pneumoperitoneum device is disclosed in, for example, German Patent Publication No. 3000218 and German Patent Publication No. 361.
No. 1018.
【０００４】前者は、送気流量の同一な送気管路を選択
使用して送気流量を調整しつつ、気体の送気と腹腔内の
圧力測定とを交互に行うようにしたものであり、また、
後者は、電気的制御回路によって送気管路の作動圧を調
整する減圧器を備えており、この減圧器における減圧動
作を変化させることによって電磁弁を使用せずに腹腔内
に送気する気体の量を制御している。The former is one in which the air supply flow rate is adjusted by selectively using the air supply pipelines having the same air supply flow rate, and the gas supply and the pressure in the abdominal cavity are alternately performed. Also,
The latter is equipped with a decompressor that adjusts the operating pressure of the air supply line by an electric control circuit, and by changing the decompression operation of this decompressor, the gas to be infused into the abdominal cavity without using a solenoid valve. Controlling the amount.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記ド
イツ特許３０００２１８号公報及びドイツ特許３６１１
０１８号公報に示される装置は、送気圧力が50mmHg程度
と低いために最大で６リットル/min程度の流量しか得る
ことができず、高速送気が難しいという問題がある。However, the above-mentioned German Patent No. 3000218 and German Patent 3611.
The apparatus disclosed in Japanese Patent No. 018 publication has a problem that high-speed air supply is difficult because only a maximum flow rate of about 6 liters / min can be obtained because the air supply pressure is as low as about 50 mmHg.
【０００６】また、こうした従来の構成のままで送気圧
を例えば100mmHg 以上と高くしてしまうと、特に設定圧
力が低い場合には、腹腔内の圧力が設定圧力をオーバー
しやすく危険である。If the air pressure is increased to 100 mmHg or more with such a conventional structure, the pressure in the abdominal cavity easily exceeds the set pressure, especially when the set pressure is low.
【０００７】本発明は上記事情に着目してなされたもの
であり、その目的とするところは、設定圧力にかかわら
ず高速送気が可能で、かつ、腹腔内の圧力が設定圧力を
オーバーする危険性のない正確な圧力制御を行なうこと
ができる気腹装置を提供することにある。The present invention has been made in view of the above circumstances, and its purpose is to enable high-speed air supply regardless of the set pressure and to prevent the pressure in the abdominal cavity from exceeding the set pressure. An object of the present invention is to provide a pneumoperitoneum device capable of performing accurate pressure control with no effect.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、気体供給源からの気体を気腹管を介して
腹腔内に注入する気腹装置において、前記気体供給源か
ら前記気腹管に至る気体供給管路の開閉を行なう開閉バ
ルブと、前記気体供給管路に設けられ腹腔内の圧力を計
測する腹腔内圧計測手段と、腹腔内の目標圧を設定する
圧力設定手段と、前記腹腔内圧計測手段によって計測さ
れた計測値と前記圧力設定手段により設定された設定値
との差を算出する演算手段と、この演算手段によって算
出された値に基づいて前記開閉バルブの開状態と閉状態
のタイミングを切換える切換え制御手段とを具備したも
のである。In order to solve the above-mentioned problems, the present invention relates to an insufflation device for injecting gas from a gas supply source into the abdominal cavity through an insufflation tube. An on-off valve that opens and closes a gas supply conduit that leads to the abdominal cavity, an intra-abdominal pressure measuring unit that is provided in the gas supply conduit and measures the pressure in the abdominal cavity, and a pressure setting unit that sets a target pressure in the abdominal cavity. A calculation means for calculating a difference between a measurement value measured by the intra-abdominal pressure measurement means and a set value set by the pressure setting means, and an open state of the opening / closing valve based on the value calculated by the calculation means And a switching control means for switching the timing of the closed state.
【０００９】[0009]
【作用】前記開閉バルブによって、設定圧力にかかわら
ず、送気流量を任意に変化させることができる。The on-off valve allows the air flow rate to be arbitrarily changed regardless of the set pressure.
【００１０】[0010]
【実施例】以下図面を参照しつつ本発明の実施例を説明
する。図１ないし図３は本発明の第１の実施例を示すも
のである。本実施例の気腹装置１は気体供給源としての
例えばＣＯ2 ガスが充填されたボンベ３と接続してお
り、ボンベ３からのＣＯ2 ガスを図示しない気腹管を介
して腹腔内に注入するものである。前記気腹管と気腹装
置１との接続は送気用コネクタに接続されたチューブを
介して行なわれる。Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. Insufflator 1 of this embodiment is connected with the cylinder 3, for example CO 2 gas-filled as a gas source, injected through a pneumoperitoneum tube (not shown) of CO 2 gas from the cylinder 3 into the abdominal cavity To do. The pneumoperitoneum and the pneumoperitoneum device 1 are connected to each other via a tube connected to an air supply connector.
【００１１】ボンベ３は２つのガスボンベ３ａ，３ｂか
らなり、これらガスボンベ３ａ，３ｂは気腹装置１の内
部に設けられた第１の減圧器６に接続チューブ１０を介
して接続されている。ガスボンベ３ａ，３ｂと接続チュ
ーブ１０との間には逆止弁４，４が配設されている。こ
の逆止弁４，４は、２つのガスボンベ３ａ，３ｂのいず
れかが空になった場合に、その空になったガスボンベを
外してもガスが外部に漏れてしまうことがないように備
えられているものである。The cylinder 3 is composed of two gas cylinders 3a and 3b, and these gas cylinders 3a and 3b are connected to a first pressure reducer 6 provided inside the pneumoperitoneum device 1 via a connection tube 10. Check valves 4 and 4 are arranged between the gas cylinders 3 a and 3 b and the connection tube 10. The check valves 4 and 4 are provided so that when either of the two gas cylinders 3a and 3b becomes empty, the gas will not leak outside even if the empty gas cylinder is removed. Is what
【００１２】また、逆止弁４，４より下流側の接続チュ
ーブ１０にはボンベ圧センサ５が設けられている。この
ボンベ圧センサ５は、ガスボンベ３の圧力を検出して、
その内容量を表すことができる。A cylinder pressure sensor 5 is provided on the connection tube 10 downstream of the check valves 4 and 4. This cylinder pressure sensor 5 detects the pressure of the gas cylinder 3,
Its content can be expressed.
【００１３】第１の減圧器６は内部管路１２を介して第
２の減圧器７に接続されている。これによって、ボンベ
３に封入される最大約50bar のＣＯ2 ガスを第１の減圧
器６において3bar程度に減圧するとともに、第２の減圧
器７において50〜200mmHg 程度に減圧できるようになっ
ている。The first pressure reducer 6 is connected to the second pressure reducer 7 via an internal conduit 12. As a result, a maximum of about 50 bar of CO 2 gas enclosed in the cylinder 3 can be decompressed to about 3 bar in the first decompressor 6 and to 50 to 200 mmHg in the second decompressor 7. ..
【００１４】また、ボンベ圧センサ５より下流側に配置
された第１の減圧器６と第２の減圧器７との間にはリリ
ーフ弁８が備えられている。このリリーフ弁８は、第１
の減圧器６が故障して、第１の減圧器６からの減圧ガス
の圧力が３bar を越えてしまった場合に、余分なガスを
大気に放出して、過大な圧力が第２の減圧器７に掛かる
のを防止する安全弁として働くようになっている。Further, a relief valve 8 is provided between the first pressure reducer 6 and the second pressure reducer 7 arranged on the downstream side of the cylinder pressure sensor 5. This relief valve 8 is
When the pressure reducer 6 of the above fails and the pressure of the pressure reducing gas from the first pressure reducer 6 exceeds 3 bar, excess gas is released to the atmosphere, and an excessive pressure causes the second pressure reducer 6 to discharge. It is designed to act as a safety valve that prevents the vehicle from hanging over.
【００１５】第２の減圧器７からのＣＯ2 ガスを下流側
に導く内部管路１２は３方向電磁弁２０を介して２つの
管路１４ａ，１４ｂに分岐しており、分岐された一方の
管路１４ａはさらに３方向電磁弁２１を介して２つの管
路１６ａ，１６ｂに分岐している。このうち、管路１６
ｂは、第１の流量計としての差圧センサ３３が設けられ
ており、第２の減圧器７から送られてくるＣＯ2 ガスを
約１６リットル／minの流量に調整できるようになって
いる。The internal conduit 12 for guiding the CO 2 gas from the second pressure reducer 7 to the downstream side is branched into two conduits 14a and 14b via the three-way solenoid valve 20, and one of the branched conduits is used. The pipeline 14a is further branched via a three-way solenoid valve 21 into two pipelines 16a and 16b. Of these, pipeline 16
In b, a differential pressure sensor 33 as a first flow meter is provided, and the CO 2 gas sent from the second pressure reducer 7 can be adjusted to a flow rate of about 16 liters / min. ..
【００１６】また、管路１６ａには第１のオリフィス３
０と第２の流量計としての差圧センサ３１とが設けられ
ており、これによって管路１６ａは第２の減圧器７から
送られてくるＣＯ2 ガスを約８リットル／min の流量に
調整できるようになっている。Further, the first orifice 3 is provided in the conduit 16a.
0 and a differential pressure sensor 31 as a second flow meter are provided, whereby the pipeline 16a regulates the CO 2 gas sent from the second pressure reducer 7 to a flow rate of about 8 liters / min. You can do it.
【００１７】また、管路１６ａは、３方向電磁弁２２を
介して、管路１８ａと、管路１８ｂとに分岐されてい
る。管路１８ａは、第２のオリフィス３２によって、３
方向電磁弁２２を介して送られてくるＣＯ2 ガスを約１
リットル／min の流量に調整できるようになっている。The conduit 16a is branched into a conduit 18a and a conduit 18b via a three-way solenoid valve 22. The pipe line 18a is set to 3 by the second orifice 32.
The CO 2 gas sent through the directional solenoid valve 22 is about 1
The flow rate can be adjusted to liter / min.
【００１８】つまり、管路１６ａと管路１８ａとを３方
向電磁弁２２を介して直列に接続することによって、こ
れら２つの管路１６ａ，１８ａを流れるＣＯ2 ガスは、
第１のオリフィス３０によって８リットル／min に一旦
絞られた後、第２のオリフィス３２によって１リットル
／min に調整されるとともに、管路１６ａから３方向電
磁弁２２を介して管路１８ｂに流れるＣＯ2 ガスは管路
１６ａにおける送気流量（約８リットル／min ）を維持
されたまま送気されることとなる。That is, by connecting the pipeline 16a and the pipeline 18a in series via the three-way solenoid valve 22, the CO 2 gas flowing through these two pipelines 16a, 18a is
After being once throttled to 8 liters / min by the first orifice 30, it is adjusted to 1 liter / min by the second orifice 32 and flows from the pipe 16a to the pipe 18b through the three-way solenoid valve 22. The CO 2 gas is supplied while maintaining the supply flow rate (about 8 l / min) in the pipe 16a.
【００１９】なお、管路１６ｂ，１８ａ，１８ｂは、下
流側で再び合流し、開閉バルブとしての３方向電磁弁２
５を介して送気用コネクタにつながる送気用管路１９に
接続している。The conduits 16b, 18a, 18b are merged again on the downstream side, and the three-way solenoid valve 2 as an opening / closing valve is connected.
It is connected to the air supply conduit 19 connected to the air supply connector via 5.
【００２０】一方、初めに分岐された管路１４ｂは３方
向電磁弁２５の下流側の送気用管路１９につながってい
る。管路１４ｂは２つの２方向電磁弁２３，２４を有し
ており、これら２方向電磁弁２３，２４の間には中間タ
ンク３４が設けられている。また、この中間タンク３４
には圧力センサ３５が接続されている。On the other hand, the first branched conduit 14b is connected to the air supply conduit 19 on the downstream side of the three-way solenoid valve 25. The pipe line 14b has two two-way electromagnetic valves 23 and 24, and an intermediate tank 34 is provided between these two-way electromagnetic valves 23 and 24. In addition, this intermediate tank 34
A pressure sensor 35 is connected to.
【００２１】また、３方向電磁弁２５の通電時には管路
１６ｂ，１８ａ，１８ｂのいずれかが送気用管路１９に
接続されるとともに、３方向電磁弁２５の非通電時には
送気用管路１９が圧力スイッチ４０につながるようにな
っている。When the three-way solenoid valve 25 is energized, one of the conduits 16b, 18a, 18b is connected to the air supply conduit 19, and when the three-way solenoid valve 25 is not energized, the air supply conduit is provided. 19 is connected to the pressure switch 40.
【００２２】また、圧力センサ３５と２方向電磁弁２
３，２４は、これらを介して腹腔内の圧力を計測する腹
腔圧力計測手段４２に電気的に接続されている。腹腔圧
力計測手段４２は演算手段４６を介して腹腔内の目標圧
を設定する圧力設定手段４８に電気的に接続されてい
る。また、演算手段４６は、開閉バルブ２５と電気的に
接続する制御手段４４に接続されており、腹腔圧力計測
手段４２によって計測された計測値と圧力設定手段４８
により設定された設定値との差を算出できるようになて
いる。そして、後述するように、制御手段４４は演算手
段４６によって算出された値に基づいて開閉バルブ２５
の開状態と閉状態のタイミングを切換えることができる
ようになっている。Further, the pressure sensor 35 and the two-way solenoid valve 2
3, 24 are electrically connected via these to abdominal pressure measuring means 42 for measuring the pressure in the abdominal cavity. The abdominal pressure measuring means 42 is electrically connected to the pressure setting means 48 for setting the target pressure in the abdominal cavity via the calculating means 46. Further, the calculation means 46 is connected to the control means 44 which is electrically connected to the opening / closing valve 25, and the measurement value measured by the abdominal pressure measurement means 42 and the pressure setting means 48.
The difference from the set value set by can be calculated. Then, as will be described later, the control means 44 causes the open / close valve 25 to operate based on the value calculated by the calculation means 46.
The timing of the open state and the closed state of can be switched.
【００２３】なお、制御手段４４には図１の点線で示す
ように各種電磁弁やセンサ類が電気的に接続している。The control means 44 is electrically connected to various solenoid valves and sensors as shown by the dotted line in FIG.
【００２４】次に、上記構成の気腹装置１の動作を説明
する。まず気腹当初は、気腹管が正確に腹腔内まで穿刺
されているかどうかが確認されるまで、安全のため低流
量、例えば１リットル／min で送気する。この送気動作
は、術者が圧力設定手段４８において、例えば流量設定
を１リットル／min に設定したり、予め設けておいた最
低速モード等を選択することによって行われる。これに
よって、制御手段４４は、内部管路１２と、第１のオリ
フィス３０を有する管路１６ａと、第２のオリフィス３
２を有する管路１８ａとが連通する方向に３方向電磁弁
２０，２１，２２を切り換えるとともに、３方向電磁弁
２５に通電して、管路１８ａと送気用管路１９とを接続
する。Next, the operation of the pneumoperitoneum device 1 having the above structure will be described. First, at the beginning of pneumoperitoneum, air is supplied at a low flow rate, for example, 1 liter / min, for safety until it is confirmed whether the pneumoperitoneum has been accurately punctured into the abdominal cavity. This insufflation operation is performed by the operator using the pressure setting means 48, for example, by setting the flow rate setting to 1 liter / min, or selecting a minimum speed mode or the like provided in advance. As a result, the control means 44 causes the internal conduit 12, the conduit 16a having the first orifice 30, and the second orifice 3 to be formed.
The three-way solenoid valves 20, 21, 22 are switched in a direction in which the two-way pipe 18a having 2 communicates with each other, and the three-way solenoid valve 25 is energized to connect the pipe 18a and the air supply pipe 19.
【００２５】１リットル／min で一定時間送気したら、
今度は、送気用管路１９と管路１４ｂとが連通する方向
に３方向電磁弁２５を切換え、圧力センサ３５によって
腹腔内の圧力を測定する。この時、送気用管路１９は３
方向電磁弁２５を介して圧力スイッチ４０ともつなが
る。この圧力測定は、電磁弁２３を開くとともに電磁弁
２４を閉じて、タンク３４内の圧力が約５０mmHgになる
までＣＯ2 ガスをタンク３４内に充填した後、電磁弁２
３を閉じ、電磁弁２４を開いて、その際に減衰するタン
ク３４内の圧力の変化を測定して腹腔内の圧力を算出す
る。こうした１リットル／min での低速送気と腹腔内の
圧力測定とは、３方向電磁弁２５の開閉を断続的に行な
うことによって、交互になされる。When air is fed at 1 liter / min for a certain period of time,
Next, the three-way solenoid valve 25 is switched in the direction in which the air supply conduit 19 and the conduit 14b communicate with each other, and the pressure in the abdominal cavity is measured by the pressure sensor 35. At this time, the air supply conduit 19 has three
It is also connected to the pressure switch 40 via the directional solenoid valve 25. In this pressure measurement, the solenoid valve 23 is opened and the solenoid valve 24 is closed, CO 2 gas is filled in the tank 34 until the pressure in the tank 34 becomes about 50 mmHg, and then the solenoid valve 2
3 is closed, the solenoid valve 24 is opened, and the change in the pressure in the tank 34 that attenuates at that time is measured to calculate the pressure in the abdominal cavity. The low-speed air supply at 1 liter / min and the pressure measurement in the abdominal cavity are alternately performed by intermittently opening and closing the three-way solenoid valve 25.
【００２６】続いて、腹腔内の内視鏡による観察及び治
療を行なう場合は、ガスの漏洩に対する補充や図示しな
いレーザや電気メスによって発生した煙の除去を行なう
必要があるが、この場合には、腹腔内にＣＯ2 ガスを高
速で送気する。Subsequently, when performing observation and treatment with an endoscope in the abdominal cavity, it is necessary to supplement gas leakage and to remove smoke generated by a laser or an electric scalpel (not shown). At high speed, CO 2 gas is supplied into the abdominal cavity.
【００２７】こうした高速の送気動作は、術者が圧力設
定部４８において、例えば流量設定を１６リットル／mi
n に設定したり、予め設けておいた最高速モード等を選
択することによって行われる。これによって、制御手段
４４は、内部管路１２と管路１６ｂとが連通する方向に
３方向電磁弁２１を切り換えるとともに、３方向電磁弁
２５に通電して管路１６ｂと送気用管路１９とを接続す
る。In such a high-speed air supply operation, the operator sets the flow rate setting in the pressure setting unit 48 to, for example, 16 liters / mi.
It is performed by setting to n or selecting a preset maximum speed mode or the like. As a result, the control means 44 switches the three-way electromagnetic valve 21 in a direction in which the internal conduit 12 and the conduit 16b communicate with each other and energizes the three-way electromagnetic valve 25 to supply the conduit 16b and the air supply conduit 19 with each other. And connect.
【００２８】このとき、管路１４ａ，１６ｂを経由して
ＣＯ2 ガスを流す送気時間、すなわち３方向電磁弁２５
の通電時間をＴｉ（i=1,2,3,…）とし、管路１４ａ，１
６ｂによるＣＯ2 ガスの送気を停止して管路１４ｂ経由
で圧力測定を行なう時間をt=500 〜1000msec( 一定）と
すると、ＣＯ2 ガスの送気と圧力測定時間のタイムチャ
ートは図２に示す制御パターンとなる。At this time, the air feeding time for flowing the CO 2 gas through the pipelines 14a and 16b, that is, the three-way solenoid valve 25
Let Ti (i = 1,2,3, ...) be the energization time of the pipes 14a, 1
Assuming that the time for measuring the pressure through the conduit 14b after stopping the CO 2 gas supply by 6b is t = 500 to 1000 msec (constant), the time chart of the CO 2 gas supply and the pressure measurement time is shown in FIG. The control pattern is shown in.
【００２９】ここで、Ｔｉの時間変化について説明す
る。まず、術者が圧力設定手段４８で腹腔内に送気し維
持する目標圧力を入力すると、演算手段４６は、その目
標圧力と腹腔圧力計測手段４２による腹腔内の実際の圧
力との差圧δＰを演算し、差圧δＰが大きい場合には送
気時間Ｔｉを長くし、差圧δＰが小さい場合はＴｉを比
較的短くする。具体的には、例えば図３に示すような関
係となる。つまり、送気時間Ｔｉと差圧δＰが送気を繰
り返すに従い徐々に小さくなると、送気時間Ｔｉは次第
に短くされる。例えば、実際の圧力が初めの設定圧力の
２，４，６，８割であれば、送気時間Ｔｉは８，６，
４，２割に自動的に減少される。そして、制御手段４４
は、前記送気時間Ｔｉに合わせて、３方向電磁弁２５の
開閉時間を制御する。このように、前述した差圧δＰと
送気時間Ｔｉ（i=1,2,3,…）との関係を維持しながら送
気と腹腔内の圧力測定とを交互に行ない、腹腔内の圧力
を徐々に設定圧力に近付ければ、高速送気を行なっても
腹腔内の圧力が設定圧力をオーバーすることはない。Here, the time change of Ti will be described. First, when the operator inputs a target pressure to be supplied and maintained in the abdominal cavity by the pressure setting means 48, the calculating means 46 causes the differential pressure δP between the target pressure and the actual pressure in the abdominal cavity measured by the abdominal pressure measuring means 42. When the differential pressure δP is large, the air feeding time Ti is lengthened, and when the differential pressure δP is small, Ti is relatively short. Specifically, for example, the relationship is as shown in FIG. That is, when the air supply time Ti and the differential pressure δP become gradually smaller as the air supply is repeated, the air supply time Ti is gradually shortened. For example, if the actual pressure is 2, 4, 60, 80% of the initial set pressure, the air supply time Ti is 8, 6,
It is automatically reduced to 40%. And the control means 44
Controls the opening / closing time of the three-way solenoid valve 25 according to the air supply time Ti. Thus, while maintaining the relationship between the differential pressure δP and the insufflation time Ti (i = 1,2,3, ...) As described above, insufflation and pressure measurement in the abdominal cavity are alternately performed to determine the pressure in the abdominal cavity. If the pressure is gradually approached to the set pressure, the pressure in the abdominal cavity does not exceed the set pressure even if high-speed air supply is performed.
【００３０】なお、３方向電磁弁２５の切り換えは、前
述したように、送気時間Ｔｉと圧力測定時間ｔとのタイ
ミングで制御するが、２次減圧器７による減圧値は必ず
しも正確に一定となるわけではないため、送気量を正確
に制御するために、送気時間Ｔｉを流量計３１，３３に
よって計測した計測値に基づいて補正することができる
ようになっている。The switching of the three-way solenoid valve 25 is controlled at the timing of the air supply time Ti and the pressure measurement time t as described above, but the pressure reduction value by the secondary pressure reducer 7 is not always exactly constant. Therefore, in order to accurately control the air supply amount, the air supply time Ti can be corrected based on the measurement values measured by the flow meters 31 and 33.
【００３１】また、術者が低速モード（約１リットル／
min ）や高速モード（約１６リットル／min ）以外の流
量で送気したい場合、例えば２〜８リットル／min の流
量で送気したい場合には、内部管路１２と、最大で８リ
ットル／min を送気することができる管路１６ａと、管
路１８ｂとが連通する方向に３方向電磁弁２０，２１，
２２が切り換えられる。そして、例えば４リットル／mi
n の流量で送気する場合は、３方向電磁弁２５の開放時
間を８リットル／min の場合の１／２の時間に短縮す
る。また、９〜１６リットル／min の流量で送気したい
場合には、内部管路１２と、最大で１６リットル／min
を送気することができる管路１６ｂとが連通する方向に
３方向電磁弁２０，２１が切り換えられる。そして、例
えば１２リットル／min の流量で送気する場合は、３方
向電磁弁２５の開放時間を１６リットル／min の場合の
３／４の時間に短縮する。In addition, the operator is in the low speed mode (about 1 liter /
min) or high-speed mode (about 16 liters / min), if you want to supply air at a flow rate of 2 to 8 liters / min. The three-way solenoid valves 20, 21, in the direction in which the conduit 16a capable of supplying the air and the conduit 18b communicate with each other.
22 is switched. And, for example, 4 liters / mi
When air is supplied at a flow rate of n, the opening time of the three-way solenoid valve 25 is shortened to 1/2 the time of 8 liters / min. If you want to send air at a flow rate of 9 to 16 liters / min, use the internal conduit 12 and a maximum of 16 liters / min.
The three-way solenoid valves 20 and 21 are switched in a direction in which the pipe 16b capable of supplying air is communicated. Then, for example, when air is supplied at a flow rate of 12 liters / min, the opening time of the three-way solenoid valve 25 is shortened to 3/4 of the time when it is 16 liters / min.
【００３２】以上説明したように、本実施例の気腹装置
１は、設定圧力と実際の圧力との差圧を算出し、送気時
間のタイミングを制御することにより簡単な構成と動作
で、高速送気による迅速な治療とオーバーシュートのな
い安全な圧力下での送気を同時に達成することができ
る。As described above, the pneumoperitoneum device 1 of the present embodiment has a simple configuration and operation by calculating the differential pressure between the set pressure and the actual pressure and controlling the timing of the air supply time. It is possible to simultaneously achieve rapid treatment by high-speed insufflation and insufflation under safe pressure without overshoot.
【００３３】ところで、腹腔内に注入されるＣＯ2 ガス
の流量は、気腹装置１に接続される気腹管の管路抵抗に
より大きく変化してしまう。すなわち、送気量の設定値
が同一（送気管路が同一）の場合、管路抵抗の大きい気
腹管を接続した場合の注入量は管路抵抗の小さい気腹管
を接続した場合の注入量に比べて小さくなってしまう。
そこで、このような場合には、以下に述べるように、流
量計３１，３３の計測値と腹腔圧力計測手段４２の計測
値とを比較することにより３方向電磁弁２５の開閉のタ
イミングを制御すればよい。By the way, the flow rate of the CO 2 gas injected into the abdominal cavity largely changes due to the conduit resistance of the pneumoperitoneum connected to the pneumoperitoneum device 1. That is, when the set value of the air supply amount is the same (the air supply ducts are the same), the injection amount when connecting the pneumoperitoneum tube with a large conduit resistance is the injection amount when connecting the pneumoperitoneum tube with a small conduit resistance. It becomes smaller than the amount.
Therefore, in such a case, as described below, the opening / closing timing of the three-way solenoid valve 25 can be controlled by comparing the measured values of the flowmeters 31 and 33 with the measured value of the abdominal pressure measuring means 42. Good.
【００３４】図４は、送気する流量の設定値を３リット
ル／min にした場合における３方向電磁弁２５の開閉時
間と腹腔内に実際に注入される流量との関係を示すタイ
ムチャートである。FIG. 4 is a time chart showing the relationship between the opening / closing time of the three-way solenoid valve 25 and the flow rate actually injected into the abdominal cavity when the set value of the flow rate to be supplied is 3 liter / min. ..
【００３５】図４の（ａ）は管路抵抗の小さい気腹管を
接続した場合、図４の（ｂ）は管路抵抗の大きな気腹管
を接続した場合を示す。なお、設定値を３リットル／mi
n にしたこの場合には、送気管路として１４ａ，１８ｂ
が選択される。FIG. 4 (a) shows the case where an insufflation tube having a small duct resistance is connected, and FIG. 4 (b) shows the case where an insufflation tube having a large duct resistance is connected. The set value is 3 liters / mi
In this case with n, 14a, 18b
Is selected.
【００３６】気腹管の管路抵抗が小さく、図４の（ａ）
に示すように、３方向電磁弁２５を開状態としたときの
注入量が５リットル／min であったとすると、３方向電
磁弁２５のＯＮ／ＯＦＦの１サイクルの時間を５秒間と
設定した場合、３方向電磁弁２５のＯＮ時間を３秒、Ｏ
ＦＦ時間を２秒とすれば、平均流量は設定された３リッ
トル／min となる。このような３方向電磁弁２５のＯＮ
／ＯＦＦのデューティー比の決定は、実際の注入量を流
量計３１によって計測し、その計測値を腹腔圧力計測手
段４２を介して演算手段４６に取り込むことにより行な
う。演算手段４６によって演算された値を基に制御手段
４４は３方向電磁弁２５の開閉駆動を制御する。The duct resistance of the pneumoperitoneum is small, and
As shown in, when the injection amount when the three-way solenoid valve 25 is opened is 5 liters / min, when the ON / OFF cycle time of the three-way solenoid valve 25 is set to 5 seconds. ON time of 3-way solenoid valve 25 is 3 seconds, O
If the FF time is 2 seconds, the average flow rate will be the set 3 liter / min. ON of such three-way solenoid valve 25
The ON / OFF duty ratio is determined by measuring the actual injection amount with the flow meter 31 and loading the measured value into the calculating means 46 via the abdominal pressure measuring means 42. Based on the value calculated by the calculation means 46, the control means 44 controls the opening / closing drive of the three-way solenoid valve 25.
【００３７】また、気腹管の管路抵抗が大きい場合（図
４の（ｂ））は、管路抵抗の小さい図４の（ａ）の場合
に比べてその注入量が５リットル／min から例えば３．
７５リットル／min に落ちているので、３方向電磁弁２
５のＯＮ時間を４秒、ＯＦＦ時間を１秒とすれば、平均
流量は３リットル／min となる。When the duct resistance of the pneumoperitoneum is large (FIG. 4 (b)), the injection amount is 5 liters / min compared to the case of FIG. 4 (a) where the duct resistance is small. For example, 3.
Since it has dropped to 75 liters / min, the 3-way solenoid valve 2
If the ON time of 5 is 4 seconds and the OFF time is 1 second, the average flow rate is 3 liters / min.
【００３８】ところで、さらに大きな管路抵抗の気腹管
が接続され、例えば実際の注入量が約３．３リットル／
min 以下となると、３方向電磁弁２５のＯＦＦ時間が
０．５秒以下になり、先に述べた腹腔圧力の測定が行え
なくなってしまう。この場合の制御方法を以下に２通り
述べる。By the way, a pneumoperitoneum having a larger duct resistance is connected, and, for example, the actual injection amount is about 3.3 liters /
When it becomes less than min, the OFF time of the three-way solenoid valve 25 becomes less than 0.5 seconds, and the abdominal pressure measurement described above cannot be performed. Two control methods will be described below.
【００３９】一つは、送気管路として１６ｂを選択し、
気腹装置の内部管路抵抗を小さくすることにより、注入
量を約３．３リットル／min 以上とする方法である。One is to select 16b as the air supply line,
This is a method in which the infusion rate is set to about 3.3 liters / min or more by reducing the internal duct resistance of the pneumoperitoneum device.
【００４０】もう一つは、２次減圧器７として可変減圧
器を用いて、送気圧を変化させる方法である。前述した
ように、減圧値は、通常５０mmHgに設定されるが、注入
量が下がって約３．３リットル／min を下回る場合には
制御手段４４を介して、減圧値を２００mmHgまでの範囲
で変化させて、注入量を約３．３リットル／min 以上と
する。この場合の可変減圧器には、電空比例弁が用いら
れる。また、減圧値を変える方法としては、図５に示す
ように２個の固定減圧器７ａ，７ｂを用いて、３方向電
磁弁２０ａで７ａ，７ｂを選択する方法も考えられる。
このように、制御方法は以上の２通りがあるが、この２
通りの方法を組み合わせることにより更に広範囲な管路
抵抗の変化に対する対応が可能となる。The other method is to use a variable pressure reducer as the secondary pressure reducer 7 to change the air pressure. As described above, the reduced pressure value is usually set to 50 mmHg, but when the injection amount decreases and falls below about 3.3 liters / min, the reduced pressure value is changed through the control means 44 within a range of up to 200 mmHg. Then, the injection amount is set to about 3.3 liters / min or more. An electropneumatic proportional valve is used for the variable pressure reducer in this case. Further, as a method of changing the depressurization value, a method of using two fixed depressurizers 7a and 7b as shown in FIG. 5 and selecting 7a and 7b by the three-way solenoid valve 20a can be considered.
As described above, there are two control methods as described above.
By combining the above methods, it becomes possible to cope with a wider range of changes in the conduit resistance.
【００４１】図６の気腹装置５０は、ガスボンベ３から
の高圧のＣＯ2 ガスを第１の減圧器６によって減圧し、
ガスボンベ３の残量を確認するため、第１の減圧器６の
上流のガス供給管路（接続チューブ）１２にボンベ圧計
５を接続してある（以下、図１と同一の構成のものは同
一符号を付してその説明を省略する）。The pneumoperitoneum device 50 of FIG. 6 decompresses the high-pressure CO 2 gas from the gas cylinder 3 by the first decompressor 6,
In order to confirm the remaining amount of the gas cylinder 3, a cylinder pressure gauge 5 is connected to a gas supply pipe (connection tube) 12 upstream of the first pressure reducer 6 (hereinafter, the same configuration as that in FIG. 1 is the same. The reference numerals are given and the description thereof is omitted).
【００４２】第１の減圧器６と第２の減圧器７との間に
はリリーフ弁８が設けられ、第１の減圧器６の故障によ
り管路が高圧になった場合、リリーフ弁８がガスを逃が
し、安全を確保するようになっている。A relief valve 8 is provided between the first pressure reducer 6 and the second pressure reducer 7, and when the pipe line becomes high in pressure due to a failure of the first pressure reducer 6, the relief valve 8 is activated. It is designed to release gas and ensure safety.
【００４３】第２の減圧器７の下流側では三方向電磁弁
６８によって送気管路１２は２つに分岐されている。こ
の送気管路１２の各分岐管路にはそれぞれ流量制御手段
６２，６４と流量検出手段６３，６５とが設けられてい
る。流量制御手段６２は高流量（例えば１６ｌ／min)、
流量制御手段６４は低流量（１ｌ／min)に設定されてお
り、三方向電磁弁６８の開閉によって高流量または低流
量の管路を選択できる。 流量制御手段６２，６４によ
ってその流量を調節されたＣＯ2 ガスは三方向電磁弁６
７の通常閉状態の入口へと送気される。三方向電磁弁６
７の他方の通常開状態の入口には管路７２を介して圧力
スイッチ６６が接続され、送気管路１２と切り換え可能
にしてある。この圧力スイッチ６６は圧力が５０mmHgに
達すると制御手段５８に対して過圧であることを示す信
号を出力する。三方向電磁弁６７の出口は送気口５６に
接続され、送気口５６は送気チューブ５７を介して患者
５２に穿刺されたトラカール５４に接続されている。On the downstream side of the second pressure reducer 7, the air supply conduit 12 is branched into two by a three-way solenoid valve 68. Flow rate control means 62, 64 and flow rate detection means 63, 65 are provided in each branch line of the air supply line 12. The flow rate control means 62 has a high flow rate (for example, 16 l / min),
The flow rate control means 64 is set to a low flow rate (1 l / min), and a high or low flow rate conduit can be selected by opening / closing the three-way solenoid valve 68. The CO 2 gas whose flow rate is adjusted by the flow rate control means 62, 64 is a three-way solenoid valve 6
Air is sent to the normally closed inlet 7. Three-way solenoid valve 6
A pressure switch 66 is connected to the other of the normally open inlets of 7 through a line 72, and can be switched to the air supply line 12. When the pressure reaches 50 mmHg, the pressure switch 66 outputs a signal indicating that the pressure is overpressure to the control means 58. The outlet of the three-way solenoid valve 67 is connected to the air supply port 56, and the air supply port 56 is connected to the trocar 54 punctured by the patient 52 via the air supply tube 57.
【００４４】また、送気管路１２には圧力検出手段６０
が設けられており、腹腔圧をモニタしている。このモニ
タ結果を制御手段５８が判断し、腹腔圧を設定値に保つ
ように三方向電磁弁６７のＯＮ／ＯＦＦを制御する。Further, the pressure detecting means 60 is provided in the air supply line 12.
Is provided to monitor abdominal pressure. The control means 58 judges the result of this monitoring, and controls the ON / OFF of the three-way solenoid valve 67 so as to keep the abdominal pressure at the set value.
【００４５】腹腔圧を測定し腹腔圧が設定値より低いと
きには三方向電磁弁６７をＯＮさせ一定時間送気を行
う。送気時間終了後には三方向電磁弁６７をＯＦＦにし
圧力スイッチ６６と腹腔内とを導通させる。このとき圧
力検出手段６０が腹腔圧を検出するが、圧力検出手段６
０が故障のため正しい腹腔圧を測定できず、腹腔圧が設
定値を大幅に上回った場合（例えば５０mmHg以上）に
は、圧力スイッチ６６がＯＮとなり、腹腔が過圧になっ
たことを制御手段５８に知らせ、送気は停止される。圧
力検出手段６０が正常に動作している場合は、腹腔圧が
設定値を超えた際、三方向電磁弁６７をＯＦＦに保持し
て、設定値を下回るまで待機する。The abdominal pressure is measured, and when the abdominal pressure is lower than the set value, the three-way solenoid valve 67 is turned on and air is supplied for a fixed time. After the end of the air supply time, the three-way solenoid valve 67 is turned off to connect the pressure switch 66 and the abdominal cavity. At this time, the pressure detecting means 60 detects the abdominal pressure, but the pressure detecting means 6
When 0 is a failure, the correct abdominal pressure cannot be measured, and when the abdominal pressure greatly exceeds the set value (for example, 50 mmHg or more), the pressure switch 66 is turned on, and the abdominal pressure becomes overpressure. 58 is notified and air supply is stopped. When the pressure detecting means 60 is operating normally, when the abdominal pressure exceeds the set value, the three-way solenoid valve 67 is held OFF and the system waits until it falls below the set value.
【００４６】高流量で送気を行う場合は、送気管路１２
を高圧にするため、第２の減圧器７の減圧値を高圧に設
定する（例えば１００mmHg）。このとき、送気口５６に
気腹針のように管路抵抗の高い気腹管を接続した場合、
送気終了後に三方向電磁弁６７を閉じ、圧力スイッチ６
６と腹腔とを導通させたときに、前記気腹管の管路内の
残圧の影響で圧力スイッチ６６が短時間動作する。この
送気直後の短時間の動作は、制御手段５８において、送
気残圧による影響によるものと判断し、送気停止を行わ
ず通常の動作を続ける。When air is fed at a high flow rate, the air feeding line 12
Is set to a high pressure, the pressure reduction value of the second pressure reducer 7 is set to a high pressure (for example, 100 mmHg). At this time, if a pneumoperitoneum having a high conduit resistance like a pneumoperitoneum is connected to the air supply port 56,
After the air supply is completed, the three-way solenoid valve 67 is closed and the pressure switch 6
When 6 and the abdominal cavity are electrically connected, the pressure switch 66 operates for a short time due to the residual pressure in the duct of the pneumoperitoneum. The control unit 58 determines that the short-time operation immediately after the air supply is caused by the residual air supply pressure, and continues the normal operation without stopping the air supply.
【００４７】以上のようにして、送気時には圧力検出手
段６０により腹腔内圧力を検出し、かつ送気停止時に
は、圧力スイッチ６６によって腹腔内圧の過圧を検知す
ることで、圧力検出手段６０の故障による腹腔過圧の危
険を回避し、安全で高速な気腹を行うことができる。As described above, the pressure detecting means 60 detects the intra-abdominal pressure during the air supply, and when the air supply is stopped, the pressure switch 66 detects the over-abdominal pressure to detect the pressure in the pressure detecting means 60. The risk of abdominal overpressure due to a failure can be avoided and safe and fast pneumoperitoneum can be performed.
【００４８】次に、第２の減圧器７での減圧値を可変と
し、圧力スイッチ４０における管路圧を圧力スイッチ４
０の動作圧力値以下にした場合について以下説明する。Next, the decompression value in the second decompressor 7 is made variable, and the line pressure in the pressure switch 40 is changed to the pressure switch 4
The case where the operating pressure value is 0 or less will be described below.
【００４９】この場合の構成は、図１で示す管路のリリ
ーフ弁８から電磁弁２１および電磁弁２３の区間を図５
に示す構成と同一にする。管路１２はリリーフ弁８の下
流において２方向に分岐して、管路１２の一方は減圧値
２００mmHgに設定された第２の減圧器７ａに接続され、
さらにその下流で３方向電磁弁２０ａに接続される。ま
た、管路１２の他方は、減圧値５０mmHgに設定された第
２の減圧器７ｂに接続されている。第２の減圧器７ｂの
下流は２方に分岐し、一方は３方向電磁弁２０ａに接続
され、他方は電磁弁２３を経由してタンク３４に接続さ
れる。また、３方向電磁弁２０ａは管路１４ａに対して
第２の減圧器７ａと７ｂを選択的に接続する。The structure of this case is such that the section from the relief valve 8 to the solenoid valve 21 and the solenoid valve 23 of the pipeline shown in FIG.
The configuration is the same as that shown in. The pipe line 12 branches in two directions downstream of the relief valve 8, and one of the pipe lines 12 is connected to a second pressure reducer 7a set to a pressure reduction value of 200 mmHg,
Further downstream thereof, it is connected to the three-way solenoid valve 20a. The other side of the pipe line 12 is connected to the second pressure reducer 7b whose pressure reduction value is set to 50 mmHg. The downstream side of the second pressure reducer 7b branches into two directions, one is connected to the three-way electromagnetic valve 20a, and the other is connected to the tank 34 via the electromagnetic valve 23. Further, the three-way solenoid valve 20a selectively connects the second pressure reducers 7a and 7b to the conduit 14a.
【００５０】次に、以上に述べた構成の作用について説
明する。まず、送気開始時に腹腔圧を測定する。これは
第１の実施例で述べた通りの動作であるがこの構成の場
合には腹腔圧測定動作中に管路抵抗の測定を行う。Next, the operation of the above configuration will be described. First, the abdominal pressure is measured at the start of insufflation. This is the operation as described in the first embodiment, but in the case of this configuration, the conduit resistance is measured during the abdominal pressure measurement operation.
【００５１】図７は、タンク３４内の圧力と時間との関
係を表すグラフである。グラフ中のａ区間は２方向電磁
弁２３を開、２方向電磁弁２４を閉として、タンク３４
内にＣＯ2 ガスを充填したときの様子を示している。こ
の場合、タンク３４内の圧力は減圧値５０mmHgまで上昇
する。ここで、２方向電磁弁２３を閉、２方向電磁弁２
４を開とすると、タンク３４内の圧力は腹腔圧まで降下
する。FIG. 7 is a graph showing the relationship between the pressure in the tank 34 and time. In the section a in the graph, the two-way solenoid valve 23 is opened, the two-way solenoid valve 24 is closed, and the tank 34
The figure shows a state in which the inside is filled with CO 2 gas. In this case, the pressure in the tank 34 rises to the reduced pressure value of 50 mmHg. Here, the two-way solenoid valve 23 is closed and the two-way solenoid valve 2
When 4 is opened, the pressure in the tank 34 drops to the abdominal pressure.
【００５２】タンク３４内の圧力の降下特性は、気腹装
置に接続された気腹管の管路抵抗の違いによって異な
る。管路抵抗の小さい気腹管が接続された場合（図中の
イ）、タンク３４内の圧力が腹腔圧に降下するまでの時
間は短く（ｂ区間）、逆に、管路抵抗が大きい気腹管の
場合（図中のロ）、前記降下時間は長くなる（ｃ区
間）。この特性を腹腔圧力計測手段４２を介して演算手
段４６で認識する。The characteristic of the pressure drop in the tank 34 differs depending on the difference in the conduit resistance of the insufflation tube connected to the insufflation device. If an abdominal tube with a small duct resistance is connected (a in the figure), the time until the pressure in the tank 34 falls to the abdominal pressure is short (section b), and conversely, the duct resistance is large. In the case of an abdominal tube (B in the figure), the descent time becomes long (section c). This characteristic is recognized by the calculating means 46 via the abdominal pressure measuring means 42.
【００５３】次に、腹腔圧力測定動作中に管路抵抗を測
定した後、送気動作に入るがこの際、演算手段４６で認
識した管路抵抗値に基づき制御手段４８により第２の減
圧器７ａまたは７ｂを選択する。この選択について以下
詳細に説明する。Next, after the conduit resistance is measured during the abdominal pressure measurement operation, the air feeding operation is started. At this time, the control means 48 controls the second decompressor based on the conduit resistance value recognized by the computing means 46. Select 7a or 7b. This selection will be described in detail below.
【００５４】まず、大口径の気腹管が接続され管路抵抗
が小さい場合には、第２の減圧器７ａを選択し、送気圧
を２００mmHgに設定する。設定後、３方向電磁弁２５に
通電すると腹腔に送気される。接続された前記気腹管の
管路抵抗は小さいため、送気中の３方向電磁弁２５での
圧力は４０mmHg程度に降下する。このため、送気後に３
方向電磁弁２５の通電を切り、圧力スイッチ４０を管路
と接続しても、圧力スイッチ４０の設定値が５０mmHgに
設定されているため、圧力スイッチ４０は作動しない。First, when a large-diameter pneumoperitoneum is connected and the conduit resistance is small, the second pressure reducer 7a is selected and the air pressure is set to 200 mmHg. After setting, when the three-way solenoid valve 25 is energized, air is sent to the abdominal cavity. Since the line resistance of the connected pneumoperitoneum is small, the pressure at the three-way solenoid valve 25 during air supply drops to about 40 mmHg. For this reason, 3
Even if the directional solenoid valve 25 is de-energized and the pressure switch 40 is connected to the conduit, the pressure switch 40 does not operate because the set value of the pressure switch 40 is set to 50 mmHg.
【００５５】次に気腹針等のような管路抵抗の大きな気
腹管が接続された場合であるが、送気圧が２００mmHgに
設定されている場合、接続された前記気腹管の抵抗値は
大きいため、送気中の３方向電磁弁２５での圧力は１５
０mmHg程度となる。この状態で、３方向電磁弁２５の通
電を切り、圧力スイッチ４０を管路１９と接続すると圧
力スイッチ４０が作動して気腹は停止してしまう。この
ため、予め測定した管路抵抗値をもとに、管路抵抗が大
きい気腹管が接続されている場合には、第２の減圧器７
ｂを選択して、送気圧を５０mmHgとし、圧力スイッチ４
０の誤動作を防ぐ。Next, in the case where a pneumoperitoneum having a large duct resistance such as a pneumoperitoneum is connected, the resistance value of the connected pneumoperitoneum when the air pressure is set to 200 mmHg. Is large, the pressure in the three-way solenoid valve 25 during air supply is 15
It will be about 0 mmHg. In this state, when the three-way solenoid valve 25 is de-energized and the pressure switch 40 is connected to the conduit 19, the pressure switch 40 operates and the pneumoperitoneum is stopped. Therefore, based on the conduit resistance value measured in advance, when the abdominal canal having a large conduit resistance is connected, the second decompressor 7
Select b, set the air pressure to 50 mmHg, and press the pressure switch 4
Prevent a malfunction of 0.
【００５６】気腹針等の管路抵抗の大きい気腹管を接続
した場合は、初期気腹等の慎重な気腹を要求される場合
が多いので、高速送気は必要とされず、５０mmHgの送気
圧により低速送気を行う。When a pneumoperitoneum tube having a large duct resistance such as a pneumoperitoneum is connected, a careful pneumoperitoneum such as an initial pneumoperitoneum is often required. Therefore, high-speed insufflation is not required and 50 mmHg Slow air supply is performed by the air pressure of.
【００５７】なお、この場合の変形例として第２の減圧
器７ａ、７ｂを１個の電空比例弁等の可変減圧器に置き
換え、制御手段４４によりこの電空比例弁の減圧値（＝
送気圧）を制御する方法も考えられる。As a modification of this case, the second pressure reducers 7a and 7b are replaced with a variable pressure reducer such as one electropneumatic proportional valve, and the control means 44 reduces the pressure reducing value (=
A method of controlling the air pressure) is also conceivable.
【００５８】このように、上述した手段によれば、圧力
スイッチ４０に働く管路の残圧の影響をなくすことがで
き、より信頼性の高い圧力スイッチ４０の動作を確保す
ることができる。As described above, according to the above-mentioned means, it is possible to eliminate the influence of the residual pressure of the pipeline acting on the pressure switch 40, and to secure the operation of the pressure switch 40 with higher reliability.
【００５９】[0059]
【発明の効果】以上説明したように本発明の気腹装置
は、設定圧力にかかわらず高速送気が可能となり、か
つ、腹腔内の圧力が設定圧力をオーバーする危険性のな
い正確な圧力制御を行なうことができる。As described above, the pneumoperitoneum device of the present invention enables high-speed insufflation regardless of the set pressure, and the accurate pressure control without the risk that the pressure in the abdominal cavity exceeds the set pressure. Can be done.
【図１】本発明の第１の実施例を示す気腹装置の回路構
成図である。FIG. 1 is a circuit configuration diagram of a pneumoperitoneum device showing a first embodiment of the present invention.
【図２】ＣＯ2 ガスの送気と圧力測定時間のタイムチャ
ートである。FIG. 2 is a time chart of CO 2 gas supply and pressure measurement time.
【図３】目標圧力と腹腔圧力計測手段による腹腔内の実
際の圧力との差圧δＰと、送気時間Ｔｉとの関係を示す
グラフ図である。FIG. 3 is a graph showing the relationship between the differential pressure δP between the target pressure and the actual pressure in the abdominal cavity measured by the abdominal pressure measuring means, and the insufflation time Ti.
【図４】送気する流量の設定値を３リットル／min にし
た場合における３方向電磁弁２５の開閉時間と腹腔内に
実際に注入される流量との関係を示すタイムチャートで
あり、（ａ）は管路抵抗の小さい気腹管を接続した場
合、（ｂ）は管路抵抗の大きな気腹管を接続した場合で
ある。FIG. 4 is a time chart showing the relationship between the opening / closing time of the three-way solenoid valve 25 and the flow rate actually injected into the abdominal cavity when the set value of the flow rate to be supplied is 3 liters / min. () Is a case where an insufflation tube having a small duct resistance is connected, and (b) is a case where an insufflation tube having a large duct resistance is connected.
【図５】第２の減圧器付近の構成の変形例を示す回路図
である。FIG. 5 is a circuit diagram showing a modification of the configuration near the second pressure reducer.
【図６】第１の実施例と異なる構成の気腹装置の回路構
成図である。FIG. 6 is a circuit configuration diagram of an insufflation device having a configuration different from that of the first embodiment.
【図７】タンク３４内の圧力と時間との関係を表すグラ
フ図である。FIG. 7 is a graph showing the relationship between the pressure in the tank and time.
１…気腹装置、１２…内部管路（気体供給管路）、２５
…三方向電磁弁（開閉バルブ）、４２…腹腔圧力計測手
段（腹腔内圧計測手段）、４４…制御手段、４６…演算
手段、４８…圧力設定手段。1 ... Pneumoperitoneum device, 12 ... Internal pipeline (gas supply pipeline), 25
... three-way solenoid valve (open / close valve), 42 ... abdominal pressure measuring means (intraperitoneal pressure measuring means), 44 ... control means, 46 ... arithmetic means, 48 ... pressure setting means.
【手続補正書】[Procedure amendment]
【提出日】平成４年８月１０日[Submission date] August 10, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００５２[Correction target item name] 0052
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００５２】タンク３４内の圧力の降下特性は、気腹装
置に接続された気腹管の管路抵抗の違いによって異な
る。管路抵抗の小さい気腹管が接続された場合（図中の
ロ）、タンク３４内の圧力が腹腔圧に降下するまでの時
間は短く（ｂ区間）、逆に、管路抵抗が大きい気腹管の
場合（図中のイ）、前記降下時間は長くなる（ｃ区
間）。この特性を腹腔圧力計測手段４２を介して演算手
段４６で認識する。The characteristic of the pressure drop in the tank 34 differs depending on the difference in the conduit resistance of the insufflation tube connected to the insufflation device. When a pneumoperitoneum with a small duct resistance is connected (in the figure,
B ) The time for the pressure in the tank 34 to fall to the abdominal pressure is short (section b), and conversely, in the case of the pneumoperitoneum with a large duct resistance (a in the figure ), the fall time is long. (Section c). This characteristic is recognized by the calculating means 46 via the abdominal pressure measuring means 42.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 谷川 廣治 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 柳川 裕 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Koji Tanigawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Yutaka Yanagawa 2-43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.
Claims (1)
腹腔内に注入する気腹装置において、前記気体供給源か
ら前記気腹管に至る気体供給管路の開閉を行なう開閉バ
ルブと、前記気体供給管路に設けられ腹腔内の圧力を計
測する腹腔内圧計測手段と、腹腔内の目標圧を設定する
圧力設定手段と、前記腹腔内圧計測手段によって計測さ
れた計測値と前記圧力設定手段により設定された設定値
との差を算出する演算手段と、この演算手段によって算
出された値に基づいて前記開閉バルブの開状態と閉状態
のタイミングを切換える切換え制御手段とを備えたこと
を特徴とする気腹装置。1. An insufflation device for injecting gas from a gas supply source into the abdominal cavity via an insufflation tube, and an opening / closing valve for opening and closing a gas supply line from the gas supply source to the insufflation tube. An intra-abdominal pressure measuring means provided in the gas supply conduit for measuring the intra-abdominal pressure, a pressure setting means for setting a target intra-abdominal pressure, a measurement value measured by the intra-abdominal pressure measuring means, and the pressure setting A calculation means for calculating a difference from the set value set by the means, and a switching control means for switching the timing of the open state and the closed state of the on-off valve based on the value calculated by the calculation means. Characterized pneumoperitoneum device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4139434A JP2665110B2 (en) | 1992-05-29 | 1992-05-29 | Insufflation device |
| US07/984,306 US5328458A (en) | 1991-12-03 | 1992-11-30 | Insufflation apparatus |
| DE4240758A DE4240758C2 (en) | 1991-12-03 | 1992-12-03 | Insufflation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4139434A JP2665110B2 (en) | 1992-05-29 | 1992-05-29 | Insufflation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05329098A true JPH05329098A (en) | 1993-12-14 |
| JP2665110B2 JP2665110B2 (en) | 1997-10-22 |
Family
ID=15245110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4139434A Expired - Fee Related JP2665110B2 (en) | 1991-12-03 | 1992-05-29 | Insufflation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2665110B2 (en) |
Cited By (6)
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|---|---|---|---|---|
| WO2006064713A1 (en) * | 2004-12-15 | 2006-06-22 | Olympus Medical Systems Corp. | Gas supply device, method of controlling gas supply device, gas supply system, and endoscope system |
| EP2929904A1 (en) | 2014-04-09 | 2015-10-14 | Fujifilm Corporation | Insufflation system and insufflation apparatus |
| JP2015198820A (en) * | 2014-04-09 | 2015-11-12 | 富士フイルム株式会社 | Air supply system and air supply device |
| JP5901863B1 (en) * | 2014-08-22 | 2016-04-13 | オリンパス株式会社 | Ultrasound endoscope, liquid feeding device for ultrasound endoscope, and ultrasound endoscope system |
| JP2016052478A (en) * | 2014-09-04 | 2016-04-14 | オリンパス株式会社 | Pneumoperitoneum device |
| JP2017525533A (en) * | 2014-08-15 | 2017-09-07 | ノースゲート テクノロジーズ インコーポレイテッドＮｏｒｔｈｇａｔｅ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｉｎｃ． | High resolution system and method for controlling high and low inhalation flow rates |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006064713A1 (en) * | 2004-12-15 | 2006-06-22 | Olympus Medical Systems Corp. | Gas supply device, method of controlling gas supply device, gas supply system, and endoscope system |
| EP2929904A1 (en) | 2014-04-09 | 2015-10-14 | Fujifilm Corporation | Insufflation system and insufflation apparatus |
| CN104970753A (en) * | 2014-04-09 | 2015-10-14 | 富士胶片株式会社 | Insufflation system and insufflation apparatus |
| JP2015198821A (en) * | 2014-04-09 | 2015-11-12 | 富士フイルム株式会社 | Gas supply system and gas supply device |
| JP2015198820A (en) * | 2014-04-09 | 2015-11-12 | 富士フイルム株式会社 | Air supply system and air supply device |
| US9878112B2 (en) | 2014-04-09 | 2018-01-30 | Fujifilm Corporation | Insufflation system and insufflation apparatus |
| JP2017525533A (en) * | 2014-08-15 | 2017-09-07 | ノースゲート テクノロジーズ インコーポレイテッドＮｏｒｔｈｇａｔｅ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｉｎｃ． | High resolution system and method for controlling high and low inhalation flow rates |
| US10661034B2 (en) | 2014-08-15 | 2020-05-26 | Northgate Technologies Inc. | High resolution system and method for controlling high and low insufflation flow rates |
| JP2021154172A (en) * | 2014-08-15 | 2021-10-07 | ノースゲート テクノロジーズ インコーポレイテッドNorthgate Technologies Inc. | Air supply system |
| JP5901863B1 (en) * | 2014-08-22 | 2016-04-13 | オリンパス株式会社 | Ultrasound endoscope, liquid feeding device for ultrasound endoscope, and ultrasound endoscope system |
| JP2016052478A (en) * | 2014-09-04 | 2016-04-14 | オリンパス株式会社 | Pneumoperitoneum device |
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| JP2665110B2 (en) | 1997-10-22 |
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