JPH0239264B2 - - Google Patents
Info
- Publication number
- JPH0239264B2 JPH0239264B2 JP58080687A JP8068783A JPH0239264B2 JP H0239264 B2 JPH0239264 B2 JP H0239264B2 JP 58080687 A JP58080687 A JP 58080687A JP 8068783 A JP8068783 A JP 8068783A JP H0239264 B2 JPH0239264 B2 JP H0239264B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- gas
- tank
- negative pressure
- driven pump
- 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 - Lifetime
Links
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 239000008280 blood Substances 0.000 description 31
- 210000004369 blood Anatomy 0.000 description 31
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000036772 blood pressure Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
- A61M60/109—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/424—Details relating to driving for positive displacement blood pumps
- A61M60/427—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being hydraulic or pneumatic
- A61M60/43—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being hydraulic or pneumatic using vacuum at the blood pump, e.g. to accelerate filling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/50—Details relating to control
- A61M60/508—Electronic control means, e.g. for feedback regulation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Mechanical Engineering (AREA)
- Anesthesiology (AREA)
- Cardiology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Jet Pumps And Other Pumps (AREA)
- External Artificial Organs (AREA)
Description
【発明の詳細な説明】
本発明は血液ポンプ装置等の気体駆動型ポンプ
の駆動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a gas-driven pump such as a blood pump device.
この種の駆動装置として、例えば第１図に示す
ように構成したものが知られている。図中符号１
は圧縮機、２は真空ポンプ、３は正圧タンク、４
は負圧タンク、５は電磁切換弁、６は減圧弁であ
る。 As this type of drive device, one configured as shown in FIG. 1, for example, is known. Code 1 in the diagram
is a compressor, 2 is a vacuum pump, 3 is a positive pressure tank, 4
5 is a negative pressure tank, 5 is an electromagnetic switching valve, and 6 is a pressure reducing valve.
圧縮機１により正圧タンク３内が所定の正圧に
維持され、また真空ポンプ２により負圧タンク４
内が所定の負圧に維持されていて、電磁切換弁５
により正圧タンク３と負圧タンク４から駆動圧出
口７に設けた血液ポンプ装置等の気体駆動型ポン
プ８に正圧と負圧が交互に作用して（加圧、吸引
して）これを駆動する。 The inside of the positive pressure tank 3 is maintained at a predetermined positive pressure by the compressor 1, and the negative pressure tank 4 is maintained by the vacuum pump 2.
The inside of the electromagnetic switching valve 5 is maintained at a predetermined negative pressure.
As a result, positive pressure and negative pressure are alternately applied (pressurized and sucked) from the positive pressure tank 3 and the negative pressure tank 4 to the gas-driven pump 8 such as a blood pump device installed at the drive pressure outlet 7. Drive.
上記駆動装置によれば、気体駆動型ポンプ８に
一定圧を供給して定格通りに動作させるために、
正圧タンク３、負圧タンク４のタンク容量を気体
駆動型ポンプ８のポンプ容量に比して例えば数十
倍（40倍〜50倍）程度大きく設定する必要があ
る。 According to the above drive device, in order to supply constant pressure to the gas-driven pump 8 and operate it as rated,
It is necessary to set the tank capacities of the positive pressure tank 3 and the negative pressure tank 4 to be several tens of times (40 to 50 times) larger than the pump capacity of the gas-driven pump 8, for example.
この理由は次の通りである。すなわち、電磁切
換弁５により正圧タンク３が開いたときには該タ
ンク３内の圧力が低下し、また負圧タンクが開い
たときには該タンク４内の圧力が上昇するが、タ
ンク容量が充分に大きいときにはこれら圧力低
下、圧力上昇は無視し得る程度である。しかし、
タンク容量が充分でないときには圧力低下、圧力
上昇の割合は大きい。減圧弁６は、一般に応答速
度がそれほど速くないために、これら圧力低下、
圧力上昇を直ちに補償することができず、圧力低
下、圧力上昇の影響が駆動圧出口７や気体駆動型
ポンプ８の圧力波形にあらわれてしまう。第２図
の実線Ａは圧力低下の影響があらわれた圧力波形
を示している。 The reason for this is as follows. That is, when the positive pressure tank 3 is opened by the electromagnetic switching valve 5, the pressure inside the tank 3 decreases, and when the negative pressure tank is opened, the pressure inside the tank 4 increases, but the tank capacity is sufficiently large. Sometimes these pressure drops and pressure increases are negligible. but,
When the tank capacity is insufficient, the rate of pressure drop and pressure rise is large. Since the pressure reducing valve 6 generally does not have a very fast response speed, these pressure drops and
It is not possible to immediately compensate for the pressure increase, and the effects of the pressure decrease and pressure increase appear on the pressure waveforms of the drive pressure outlet 7 and the gas-driven pump 8. A solid line A in FIG. 2 shows a pressure waveform affected by the pressure drop.
なお、第２図中一点鎖線Ｂは圧力低下のない理
想圧力波形を示し、また点線Ｃは気体の補充がな
い場合の正圧タンク３の圧力曲線を示し、また二
点鎖線Ｄは減圧弁６の動作による圧力曲線を示し
ている。 In FIG. 2, the dashed line B shows the ideal pressure waveform with no pressure drop, the dotted line C shows the pressure curve of the positive pressure tank 3 without gas replenishment, and the dashed double dotted line D shows the pressure waveform of the pressure reducing valve 6. The pressure curve due to the operation is shown.
また、駆動圧出口７と気体駆動型ポンプ８との
間の流路が長く、かつこの流路が細い可撓性ホー
スにより形成されている場合には、圧力低下の影
響の外に管内抵抗及び管の変形等の影響が加わ
り、気体駆動型ポンプ８での圧力波形は第３図に
示すようにローパスフイルタを通した如き波形と
なつてしまう。 Furthermore, if the flow path between the driving pressure outlet 7 and the gas-driven pump 8 is long and this flow path is formed by a thin flexible hose, in addition to the influence of pressure drop, internal resistance and Due to the influence of pipe deformation, etc., the pressure waveform in the gas-driven pump 8 becomes a waveform as if passed through a low-pass filter, as shown in FIG.
特に、血液ポンプ装置では、血液ポンプの呈す
る血圧曲線が自然心臓のそれにできる限り近いこ
と、最も理想的には同じであることが必要であ
り、このため血液ポンプ装置を駆動する装置で
は、上述のような圧力低下や圧力上昇を極力抑え
なければならず、タンク３，４の容量は充分に大
きく設定する必要がある。 In particular, in blood pump devices, it is necessary that the blood pressure curve exhibited by the blood pump be as close as possible to that of the natural heart, and most ideally, be the same. Such pressure drop and pressure rise must be suppressed as much as possible, and the capacities of the tanks 3 and 4 must be set sufficiently large.
以上のようなタンク３，４の容量を充分に大き
くする必要があることから、装置はこれらタンク
３，４によりほとんど占められてしまい、小型化
しにくい問題がある。 Since it is necessary to sufficiently increase the capacity of the tanks 3 and 4 as described above, the apparatus is almost entirely occupied by these tanks 3 and 4, making it difficult to downsize the apparatus.
本発明は上記事情に鑑みてなされたもので、そ
の目的とするところは、気体駆動型ポンプを定格
通りに動作させることができる上に、タンク容量
を小さくして装置全体を小型化することができる
気体駆動型ポンプの駆動装置を提供することであ
る。 The present invention was made in view of the above circumstances, and its purpose is to not only enable a gas-driven pump to operate as rated, but also to reduce the tank capacity and downsize the entire device. It is an object of the present invention to provide a driving device for a gas-driven pump that is capable of driving a gas-driven pump.
すなわち、本発明は高圧源（圧縮機）に接続さ
れた正圧タンクと、負圧源（真空ポンプ）に接続
された負圧タンクとを具備し、これらタンクから
駆動圧出口に装備された気体駆動型ポンプに正圧
と負圧とを交互に作用して駆動するようにした気
体駆動型ポンプの駆動装置において、前記正圧タ
ンクの入口側に設けられる調圧弁（減圧弁）と前
記高圧源との間から分岐して該調圧弁と前記気体
駆動型ポンプとの間に接続される分岐ラインおよ
び／または前記負圧タンクの入口側に設けられる
調圧弁（減圧弁）と前記負圧源との間から分岐し
て該調圧弁と前記気体駆動型ポンプとの間に接続
される分岐ラインを設けて、前記正圧タンクから
正圧あるいは前記負圧タンクから負圧を気体駆動
型ポンプに作用する時、これと同期して該分岐ラ
インから直接前記正圧よりも高圧の正圧あるいは
前記負圧よりも低圧の負圧が短時間作用するよう
に構成してなることを特徴としている。 That is, the present invention includes a positive pressure tank connected to a high pressure source (compressor) and a negative pressure tank connected to a negative pressure source (vacuum pump), and gas from these tanks is supplied to the driving pressure outlet. A drive device for a gas-driven pump configured to drive the driven pump by applying positive pressure and negative pressure alternately, comprising: a pressure regulating valve (pressure reducing valve) provided on the inlet side of the positive pressure tank; and the high pressure source. and/or a branch line branched from between the pressure regulating valve and the gas-driven pump and/or a pressure regulating valve (pressure reducing valve) provided on the inlet side of the negative pressure tank and the negative pressure source. A branch line is provided between the pressure regulating valve and the gas-driven pump to apply positive pressure from the positive pressure tank or negative pressure from the negative pressure tank to the gas-driven pump. When this occurs, a positive pressure higher than the positive pressure or a negative pressure lower than the negative pressure is applied directly from the branch line for a short period of time.
以下本発明の一実施例を図面を参照して説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第４図は本発明の駆動装置の一例を示すブロツ
ク図である。図中第１図に示す部分と同一部分に
は同一符号を付してその説明を省略する。 FIG. 4 is a block diagram showing an example of the drive device of the present invention. In the figure, the same parts as those shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.
本実施例では、圧縮機１、正圧タンク３ａ、電
磁切換弁５及び駆動圧出口７等からなる正圧ライ
ン９に、正圧タンク３ａの入口側の減圧弁６と圧
縮機１との間から分岐して駆動圧出口７に接続さ
れて、圧縮機１と駆動圧出口７とを直接連結する
分岐ライン１０を設けている。また、真空ポンプ
２、負圧タンク４ａ、電磁切換弁５及び駆動圧出
口７等からなる負圧ライン１１に、負圧タンク４
ａの入口側の減圧弁６と真空ポンプ２との間から
分岐して駆動圧出口７に接続されて、真空ポンプ
２と駆動圧出口７とを直接連結する分岐ライン１
２を設けている。 In this embodiment, a positive pressure line 9 consisting of the compressor 1, the positive pressure tank 3a, the electromagnetic switching valve 5, the drive pressure outlet 7, etc. is connected between the pressure reducing valve 6 on the inlet side of the positive pressure tank 3a and the compressor 1. A branch line 10 is provided which branches off from the drive pressure outlet 7 and connects the compressor 1 and the drive pressure outlet 7 directly. In addition, a negative pressure tank 4 is connected to a negative pressure line 11 consisting of a vacuum pump 2, a negative pressure tank 4a, an electromagnetic switching valve 5, a drive pressure outlet 7, etc.
A branch line 1 that branches from between the pressure reducing valve 6 on the inlet side of a and the vacuum pump 2 and is connected to the drive pressure outlet 7 to directly connect the vacuum pump 2 and the drive pressure outlet 7.
2 are provided.
分岐ライン１０には調圧弁１３と電磁弁１４と
が設けられ、また分岐ライン１１には同じく調節
弁１５と電磁弁１６とが設けられている。 The branch line 10 is provided with a pressure regulating valve 13 and a solenoid valve 14, and the branch line 11 is similarly provided with a regulating valve 15 and a solenoid valve 16.
電磁弁１４，１６は図示しない制御装置により
電磁切換弁５と同期して動作する。第５図は電磁
弁１４，１６と電磁切換弁５のタイミングチヤー
トを示している。同図によると、電磁切換弁５が
正圧タンク３ａ側に切換わつたとき、これに同期
して電磁弁１４が短時間開く（第５図ｂ）。また、
電磁切換弁５が負圧タンク４ａ側に切換わつたと
き、これに同期して電磁弁１６が短時間開く（第
５図ｃ）。 The solenoid valves 14 and 16 operate in synchronization with the solenoid switching valve 5 by a control device (not shown). FIG. 5 shows a timing chart of the solenoid valves 14, 16 and the solenoid switching valve 5. According to the figure, when the electromagnetic switching valve 5 is switched to the positive pressure tank 3a side, the electromagnetic valve 14 opens for a short time in synchronization with this (Fig. 5b). Also,
When the electromagnetic switching valve 5 switches to the negative pressure tank 4a side, the electromagnetic valve 16 opens for a short time in synchronization with this (FIG. 5c).
すなわち、本実施例では、電磁切換弁５と同期
して電磁弁１４，１６が動作することにより、正
圧タンク３ａ、負圧タンク４ａから気体駆動型ポ
ンプ８に正圧、負圧が作用するとき、これに同期
して圧縮機１、真空ポンプ２からも分岐ライン１
０，１２を通して気体駆動型ポンプ８に直接正
圧、負圧が作用し、圧力低下、圧力上昇の影響を
なくしている。分岐ライン１０からの正圧は正圧
タンク３ａよりも高圧で、また分岐ライン１２か
らの負圧は負圧タンク４ａよりも低圧である。 That is, in this embodiment, by operating the solenoid valves 14 and 16 in synchronization with the solenoid switching valve 5, positive pressure and negative pressure act on the gas-driven pump 8 from the positive pressure tank 3a and the negative pressure tank 4a. At the same time, branch line 1 is also connected from compressor 1 and vacuum pump 2.
0 and 12, positive pressure and negative pressure directly act on the gas-driven pump 8, eliminating the effects of pressure drop and pressure rise. The positive pressure from the branch line 10 is higher than the positive pressure tank 3a, and the negative pressure from the branch line 12 is lower than the negative pressure tank 4a.
第６図及び第７図は正圧作用時（加圧気体供給
時）における駆動圧出口７、気体駆動型ポンプ８
での圧力波形を示している。同図によると、正圧
タンク３ａのみでは二点鎖線Ｆに示すように圧力
低下の影響により減圧弁６が応答するまでの間、
所定圧力に達しないが、電磁切換弁５に同期して
短時間開く電磁弁１４により分岐ライン１０を介
して圧縮機１から直接加圧気体が作用して（点線
Ｇ参照）、正圧供給当初における圧力低下を補償
し、駆動圧出口７、気体駆動型ポンプ８での圧力
波形は実線Ｅに示すようにある程度理想波形Ｂに
近づく。なお、第６図の二点鎖線Ｆは第２図に示
す実線Ａと対応し、また第７図の二点鎖線Ｆは第
３図に示す実線Ａと対応している。 Figures 6 and 7 show the driving pressure outlet 7 and the gas-driven pump 8 during positive pressure operation (pressurized gas supply).
Shows the pressure waveform at . According to the figure, with only the positive pressure tank 3a, as shown by the two-dot chain line F, until the pressure reducing valve 6 responds due to the influence of the pressure drop,
Although the predetermined pressure is not reached, pressurized gas acts directly from the compressor 1 via the branch line 10 by the electromagnetic valve 14, which opens for a short time in synchronization with the electromagnetic switching valve 5 (see dotted line G), and the positive pressure is initially supplied. The pressure waveform at the driving pressure outlet 7 and the gas-driven pump 8 approaches the ideal waveform B to some extent as shown by the solid line E. The two-dot chain line F in FIG. 6 corresponds to the solid line A shown in FIG. 2, and the two-dot chain line F in FIG. 7 corresponds to the solid line A shown in FIG. 3.
従つて、正圧タンク３ａ、負圧タンク４ａの容
量を前述のように大きく設定することなく、気体
駆動型ポンプを定格通りに動作させることが可能
となる。 Therefore, the gas-driven pump can be operated as rated without increasing the capacities of the positive pressure tank 3a and the negative pressure tank 4a as described above.
電磁弁１４，１６よりの気体量は、電磁弁１
４，１６の弁口径、流路の長さ、調節弁１３，１
５の開度等より調節できる。駆動圧出口７から気
体駆動型ポンプ８までの流路１８（可撓性ホー
ス）を一定の長さに設定すれば、電磁弁１４，１
６の弁口径等で気体量を調節でき、調節弁１３，
１５は必要としない。 The amount of gas from the solenoid valves 14 and 16 is
4, 16 valve diameter, flow path length, control valve 13, 1
It can be adjusted by the opening degree etc. of 5. If the flow path 18 (flexible hose) from the drive pressure outlet 7 to the gas-driven pump 8 is set to a certain length, the solenoid valves 14,1
The gas amount can be adjusted with the valve diameter etc. of 6, and the control valve 13,
15 is not necessary.
気体駆動型ポンプ８には、人工心臓用の血液ポ
ンプ装置が使用される。この血液ポンプ装置は、
例えば第８図に示すように、気体を導入及び排出
する為のポート２０を有した耐圧性のハウジング
アウタケース２１内に偏平袋状の血液チヤンバー
２２を、その上部に設けたつば部２３を介して気
密に収納して構成されている。つば部２３には血
液導入用導管２４と、血液排出用導管２５とがほ
ぼ平行に立設されていて、これら血液導入用導管
２４と血液排出用導管２５には逆止弁２６，２７
が設けられている。 As the gas-driven pump 8, a blood pump device for an artificial heart is used. This blood pump device
For example, as shown in FIG. 8, a flat bag-shaped blood chamber 22 is placed inside a pressure-resistant housing outer case 21 having a port 20 for introducing and discharging gas, and a blood chamber 22 is placed in the shape of a flat bag through a collar 23 provided at the top of the chamber. It is configured to be stored airtight. A blood introduction conduit 24 and a blood discharge conduit 25 are erected in substantially parallel to the collar 23, and these blood introduction conduit 24 and blood discharge conduit 25 have check valves 26, 27.
is provided.
ポート２０は駆動圧出口７に接続されていて、
ハウジングアウタケース２１に加圧気体が導入さ
れると、該気体の圧力により血液チヤンバー２２
が押しつぶされ、血液チヤンバー２２内の血液は
逆止弁２７を通じて血液排出用導管２５から押し
出される。次いで、ハウジングアウタケース２１
内を減圧すると、血液チヤンバー２２はその弾性
復元力により膨張し、逆止弁２６が開き血液導入
用導管２４から血液チヤンバー２２内に血液が導
入される。この動作を順次繰返すことによつて、
血液を周期的に送り出す。 The port 20 is connected to the drive pressure outlet 7,
When pressurized gas is introduced into the housing outer case 21, the pressure of the gas causes the blood chamber 22 to
is crushed and the blood in the blood chamber 22 is forced out of the blood drainage conduit 25 through the check valve 27. Next, the housing outer case 21
When the internal pressure is reduced, the blood chamber 22 expands due to its elastic restoring force, the check valve 26 opens, and blood is introduced into the blood chamber 22 from the blood introduction conduit 24. By repeating this operation sequentially,
Pump blood periodically.
なお、第４図中２９は正圧タンク９に設けたタ
ンク、３０は負圧タンク１１に設けたタンクであ
り、圧縮機１あるいは真空ポンプ２の圧力を蓄え
るもので、必ずしも必要としない。 In FIG. 4, 29 is a tank provided in the positive pressure tank 9, and 30 is a tank provided in the negative pressure tank 11, which are used to store the pressure of the compressor 1 or the vacuum pump 2, and are not necessarily required.
次に上記実施例の作用を説明する。 Next, the operation of the above embodiment will be explained.
圧縮機１により正圧タンク３ａ内が所定の正圧
に維持され、また真空ポンプ２により負圧タンク
４ａ内が所定の負圧に維持されている。そして、
電磁切換弁５が正圧タンク３ａ側に切換わると、
加圧気体が該電磁切換弁５から駆動圧出口７を通
つてポート２０からハウジングアウタケース２１
内に供給される。このとき、電磁切換弁５に同期
して電磁弁１４が開き、圧縮機１から直接加圧気
体が短時間ポート２０からハウジングアウタケー
ス２１内に供給される。従つて、加圧気体の供給
当初において正圧タンク３ａ内で圧力低下が生じ
ても、ハウジングアウタケース２１内の圧力波形
には何ら影響を与えない。このため、ハウジング
アウタケース２１内は立上がりの遅れがなく所定
圧力に加圧され、これにより血液チヤンバー２２
から血液が逆止弁２７を通じ血液排出用導管２５
から押し出される。 The compressor 1 maintains the inside of the positive pressure tank 3a at a predetermined positive pressure, and the vacuum pump 2 maintains the inside of the negative pressure tank 4a at a predetermined negative pressure. and,
When the electromagnetic switching valve 5 is switched to the positive pressure tank 3a side,
Pressurized gas flows from the electromagnetic switching valve 5 through the drive pressure outlet 7 and from the port 20 to the housing outer case 21.
supplied within. At this time, the solenoid valve 14 opens in synchronization with the solenoid switching valve 5, and pressurized gas is directly supplied from the compressor 1 into the housing outer case 21 from the port 20 for a short time. Therefore, even if a pressure drop occurs within the positive pressure tank 3a at the beginning of supply of pressurized gas, the pressure waveform within the housing outer case 21 is not affected at all. Therefore, the inside of the housing outer case 21 is pressurized to a predetermined pressure without any delay in rising, and thereby the blood chamber 22 is pressurized to a predetermined pressure.
The blood flows through the check valve 27 and into the blood discharge conduit 25.
being pushed out from
次いで、電磁切換弁５が負圧タンク４ａ側に切
換わると、ハウジングアウタケース２１内から気
体がポート２０を通り、負圧タンク４ａ内に吸引
され、該負圧タンク４ａから減圧弁６を通り真空
ポンプ２により外部に排出される。このとき、電
磁切換弁５に同期して電磁弁１６が開き、真空ポ
ンプ２によりハウジングアウタケース２１内から
直接気体が吸引される。従つて、気体の吸引当初
において負圧タンク４ａ内で圧力上昇が生じて、
ハウジングアウタケース２１内は立下がりの遅れ
がなく所定圧力に減圧され、これにより逆止弁２
６が開き（この時逆止弁２７は閉じている）血液
導入用導管２４から血液が血液チヤンバー２２内
に導入される。 Next, when the electromagnetic switching valve 5 is switched to the negative pressure tank 4a side, gas from inside the housing outer case 21 passes through the port 20, is sucked into the negative pressure tank 4a, and from the negative pressure tank 4a passes through the pressure reducing valve 6. It is discharged to the outside by the vacuum pump 2. At this time, the solenoid valve 16 opens in synchronization with the solenoid switching valve 5, and the vacuum pump 2 sucks gas directly from inside the housing outer case 21. Therefore, at the beginning of gas suction, a pressure rise occurs in the negative pressure tank 4a,
The pressure inside the housing outer case 21 is reduced to a predetermined pressure without any delay in falling, and as a result, the check valve 2
6 is opened (at this time, the check valve 27 is closed) and blood is introduced into the blood chamber 22 from the blood introduction conduit 24.
従つて、血液ポンプ装置を定格通りに動作させ
ることができ、該血液ポンプ装置の呈する血圧曲
線を自然心臓のそれにできる限り近づけることが
可能となる。 Therefore, the blood pump device can be operated as rated, and the blood pressure curve exhibited by the blood pump device can be brought as close as possible to that of a natural heart.
上記実施例では、血液ポンプ装置に適用した場
合を示したが、これに限定されず、通常の気体駆
動型ポンプに広く適用できる。 In the above embodiment, a case where the present invention is applied to a blood pump device is shown, but the present invention is not limited to this, and can be widely applied to ordinary gas-driven pumps.
また、適用する気体駆動型ポンプによつては、
正圧ライン９あるいは負圧ライン１１のいずれか
一方にのみ分岐ラインを設けてもよい。 Also, depending on the gas-driven pump used,
A branch line may be provided only in either the positive pressure line 9 or the negative pressure line 11.
さらに、第９図に示すように、分岐ライン１
０，１２を駆動圧出口７に接続する代わりに、分
岐ライン１０，１２に設けられた弁１４，１６の
出口を正圧タンク３ａ、負圧タンク４ａに接続し
てもよい。要は、減圧弁６と空気駆動型ポンプ８
の間ならばどこでもよく、これにより減圧弁６の
応答遅れを補償することができる。 Furthermore, as shown in FIG.
0 and 12 to the driving pressure outlet 7, the outlets of the valves 14 and 16 provided in the branch lines 10 and 12 may be connected to the positive pressure tank 3a and the negative pressure tank 4a. In short, the pressure reducing valve 6 and the air-driven pump 8
Anywhere in between is sufficient, and thereby the response delay of the pressure reducing valve 6 can be compensated for.
さらにまた、電磁切換弁５の代わりに、正圧タ
ンク３ａ、負圧タンク４ａの出口側にそれぞれ電
磁弁を設けて、これら電磁弁を交互に開くように
してもよい。 Furthermore, instead of the electromagnetic switching valve 5, electromagnetic valves may be provided on the outlet sides of the positive pressure tank 3a and the negative pressure tank 4a, respectively, and these electromagnetic valves may be opened alternately.
以上説明したように本発明によれば、正圧タン
クの入口側に設けられる調圧弁（減圧弁）と高圧
源（圧縮機）との間から分岐して該調圧弁と気体
駆動型ポンプとの間に接続される分岐ラインおよ
び／または負圧タンクの入口側に設けられる調圧
弁（減圧弁）と負圧源（真空ポンプ）との間から
分岐して該調圧弁と気体駆動型ポンプとの間に接
続される分岐ラインを設けて正圧タンクから正圧
あるいは負圧タンクから負圧を作用する時、これ
と同期して該分岐ラインから直接前記正圧よりも
高圧の正圧あるいは前記負圧よりも低圧の負圧が
短時間作用するように構成してあるので、正圧タ
ンク、負圧タンクのタンク容量を気体駆動型ポン
プのポンプ容量に比して充分に大きく設定するよ
うなことをしなくても該気体駆動型ポンプに一定
圧力を供給して定格通り動作させることができ
る。このため正圧タンク、負圧タンクを小容量に
して装置の小型化を図ることが可能となる。ま
た、駆動圧出口と気体駆動型ポンプとを長尺な小
径の可撓性ホースで連結しても管内抵抗等の影響
をなくすことが可能である。 As explained above, according to the present invention, a branch is established between the pressure regulating valve (pressure reducing valve) provided on the inlet side of the positive pressure tank and the high pressure source (compressor) to connect the pressure regulating valve and the gas-driven pump. A branch line is connected between the pressure regulating valve (pressure reducing valve) provided at the inlet side of the negative pressure tank and a negative pressure source (vacuum pump), and a branch line is connected between the pressure regulating valve and the gas-driven pump. When applying positive pressure from a positive pressure tank or negative pressure from a negative pressure tank by providing a branch line connected between the Since the structure is such that negative pressure, which is lower than the pressure, acts for a short time, the tank capacity of the positive pressure tank and negative pressure tank should be set sufficiently larger than the pump capacity of the gas-driven pump. It is possible to supply a constant pressure to the gas-driven pump and operate it as rated without having to do so. Therefore, it is possible to reduce the capacity of the positive pressure tank and the negative pressure tank, thereby reducing the size of the device. Further, even if the drive pressure outlet and the gas-driven pump are connected by a long, small-diameter flexible hose, it is possible to eliminate the effects of internal resistance and the like.
次に本発明の具体例を説明する。 Next, specific examples of the present invention will be explained.
第４図に示す駆動装置を使用して、ポンプとチ
ユーブの合計容量200c.c.の血液ポンプを駆動しハ
ウジングアウタケース内の圧力波形を圧力トラン
ジユーサにより測定した。得られた圧力波形を第
６図の実線で示した。このとき、正圧タンク３ａ
のタンク容量及び圧力は２、0.26Kg／cm2であ
り、また負圧タンク４ａのタンク容量及び圧力は
２、−0.03Kg／cm2であつた。また、電磁弁１４，
１６の開時間は80mmsecで、分岐ライン１０から
の正圧の圧力は１Kg／cm2、分岐ライン１２からの
負圧の圧力は−0.799Kg／cm2あつた。 Using the drive device shown in FIG. 4, a blood pump with a total capacity of 200 c.c. of the pump and tube was driven, and the pressure waveform inside the housing outer case was measured using a pressure transducer. The obtained pressure waveform is shown by the solid line in FIG. At this time, positive pressure tank 3a
The tank capacity and pressure of the negative pressure tank 4a were 2.0.26 kg/cm 2 , and the tank capacity and pressure of the negative pressure tank 4a were 2.03 kg/cm 2 . In addition, the solenoid valve 14,
16 was open for 80 mmsec, the positive pressure from the branch line 10 was 1 Kg/cm 2 , and the negative pressure from the branch line 12 was -0.799 Kg/cm 2 .
比較例として第１図に示す駆動装置を使用し
た。この場合、第１０図の実線で示す圧力波形を
得るためには、正圧タンク３のタンク容量は10
必要であり、また負圧タンク４のタンク容量は10
必要であつた。 As a comparative example, a drive device shown in FIG. 1 was used. In this case, in order to obtain the pressure waveform shown by the solid line in Fig. 10, the tank capacity of positive pressure tank 3 must be 10
is necessary, and the tank capacity of negative pressure tank 4 is 10
It was necessary.
すなわち、本発明では、第１図に示す駆動装置
に比して、正圧タンク３ａのタンク容量を５分の
１まで縮小でき、また負圧タンク４ａのタンク容
量を５分の１まで縮小できた。 That is, in the present invention, the tank capacity of the positive pressure tank 3a can be reduced to one-fifth, and the tank capacity of the negative pressure tank 4a can be reduced to one-fifth, compared to the drive device shown in FIG. Ta.
第１図は従来の装置のブロツク図、第２図及び
第３図は圧力低下の影響が表われた圧力波形図、
第４図は本発明の一実施例を示すブロツク図、第
５図ａ，ｂ，ｃは電磁切換弁５、電磁弁１４，１
６のタイムチヤート、第６図及び第７図は本発明
の装置を使用したときの圧力波形図、第８図は血
液ポンプ装置の一例を示す分解斜視図、第９図は
他の実施例を示す一部省略ブロツク図、第１０図
は第１図の装置を使用したときの圧力波形図であ
る。
１…高圧源（圧縮機）、２…負圧源（真空ポン
プ）、３ａ…正圧タンク、４ａ…負圧タンク、５
…電磁切換弁、６…調圧弁（減圧弁）、７…駆動
圧出口、８…気体駆動型ポンプ、１０，１２…分
岐ライン。
Figure 1 is a block diagram of a conventional device, Figures 2 and 3 are pressure waveform diagrams showing the effects of pressure drop,
FIG. 4 is a block diagram showing one embodiment of the present invention, and FIG.
6 and 7 are pressure waveform diagrams when the device of the present invention is used, FIG. 8 is an exploded perspective view showing an example of a blood pump device, and FIG. 9 is a diagram showing another embodiment. The partially omitted block diagram shown in FIG. 10 is a pressure waveform diagram when the apparatus of FIG. 1 is used. 1... High pressure source (compressor), 2... Negative pressure source (vacuum pump), 3a... Positive pressure tank, 4a... Negative pressure tank, 5
... Solenoid switching valve, 6... Pressure regulating valve (pressure reducing valve), 7... Driving pressure outlet, 8... Gas-driven pump, 10, 12... Branch line.
Claims (1)
接続された負圧タンクとを具備し、これらタンク
から駆動圧出口に装備された気体駆動型ポンプに
正圧と負圧とを交互に作用して駆動するようにし
た気体駆動型ポンプの駆動装置において、前記正
圧タンクの入口側に設けられる調圧弁と前記高圧
源との間から分岐して該調圧弁と前記気体駆動型
ポンプとの間に接続される分岐ラインおよび／ま
たは前記負圧タンクの入口側に設けられる調圧弁
と前記負圧源との間から分岐して該調圧弁と前記
気体駆動型ポンプとの間に接続される分岐ライン
を設けて、前記高圧タンクから正圧あるいは前記
負圧タンクから負圧を気体駆動型ポンプに作用す
る時、これと同期して該分岐ラインを介し高圧源
あるいは負圧源から直接前記正圧よりも高圧の正
圧あるいは前記負圧よりも低圧の負圧が短時間作
用するように構成してなることを特徴とする気体
駆動型ポンプの駆動装置。1 A positive pressure tank connected to a high pressure source and a negative pressure tank connected to a negative pressure source are provided, and positive pressure and negative pressure are alternately supplied from these tanks to a gas-driven pump equipped at a driving pressure outlet. In the driving device for a gas-driven pump, the drive device is configured to branch from between a pressure regulating valve provided on the inlet side of the positive pressure tank and the high pressure source to connect the pressure regulating valve and the gas-driven pump. and/or a branch line connected between the pressure regulating valve provided on the inlet side of the negative pressure tank and the negative pressure source and connected between the pressure regulating valve and the gas-driven pump. When applying positive pressure from the high-pressure tank or negative pressure from the negative-pressure tank to the gas-driven pump, a branch line is provided in which the high-pressure source or negative pressure source is applied directly to the gas-driven pump through the branch line. A drive device for a gas-driven pump, characterized in that the device is configured so that a positive pressure higher than the positive pressure or a negative pressure lower than the negative pressure acts for a short time.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080687A JPS59206698A (en) | 1983-05-11 | 1983-05-11 | Driving gear of gas driven type pump |
| US06/609,084 US4548550A (en) | 1983-05-11 | 1984-05-11 | Method and system for driving blood pumping devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080687A JPS59206698A (en) | 1983-05-11 | 1983-05-11 | Driving gear of gas driven type pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59206698A JPS59206698A (en) | 1984-11-22 |
| JPH0239264B2 true JPH0239264B2 (en) | 1990-09-04 |
Family
ID=13725245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58080687A Granted JPS59206698A (en) | 1983-05-11 | 1983-05-11 | Driving gear of gas driven type pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59206698A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224359A (en) * | 1986-03-26 | 1987-10-02 | アイシン精機株式会社 | Auxiliary circulation machinery driving apparatus |
-
1983
- 1983-05-11 JP JP58080687A patent/JPS59206698A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59206698A (en) | 1984-11-22 |
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