The Kimura medical department instrument
miniVent-3miniVent-3
1. The characteristic (Outward appearance photograph of figure miniVent-3, figure ; Outward appearance photograph of miniVent-3)
miniVent-3 was developed as the successor species of KV1+1. It is an emergency-visit, the light-weight simple machine of small-sized of the gaseous-oxygen driving-source method which assumed a thing for the conveyance. It is possible to work in the power of the outside DC power, built-in battery, 100 V of AC. The operation with the ambiguousness which was in KV1+1 became digital setting and became handy. The oxygen concentration can choose only 45% (the time of the air mixing) and 100%. On the other hand, miniVent-3 is the successor species of KV-3. Because it has a blender for the oxygen concentration control, the oxygen concentration can be freely set. However, because it needs compressed air, as the movement business, it isn't possible to use. It is equipped with the continuous flow mechanism, too, for the spontaneous-respiration of CPAP and SIMV.
2. The performance
The mode .A/CSIMVCPAP
The taking air quantity of ventilation .50-2500 The ml (50-2250 The time of the ml, the air mixing)
The intake gas flow rate .10-50 LPM
Breathing number of times .2-60 BPM
The intake time .0.3-30 sec.
PEEP. .0-20pH2O
The continuous flow .0-40 LPM (Only the miniVent3+ model)
The weight .5 Kg
The power consumption .AC100v 18VA , DC 12v 0.4A
The battery operating time The about 2 inner hours
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3. The outline of the mechanism (Figure ; New Mattick circuit of miniVent) (Figure ; Controlling mechanism key map of miniVent)
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In miniVent-3, the gas pressure of oxygen becomes a driving-source. Oxygen is decompressed with the regulator. At the time (O2 is 45%) of the air mixing, it makes intake gas with SL1 Solenoid-controlled valve's continuing intermittently. An intake flow rate is controlled with neelde valve NL1. After that, it dilutes with the AIR mixer (jet Venturi effect). Non-return valve CV1 is provided for the mixer in intake gas for 100% of oxygen drive so as not to flow backward. On the other hand, at the time of 100% of oxygen, intake gas is made with Solenoid-controlled valve SL2 and neelde valve NL7.
The new Mattick circuit of miniVent-3 is the same as KV-3 almost. The difference is the existence or non-existence of the shut off valve of control-gas to the PEEP adjustment mechanism. The gas which adjusted an oxygen concentration by the blender becomes intake gas with Solenoid-controlled valve SL1 and neelde valve NL-1. SL4 passes dense fog for the nebulizer drive only in case of intake by Solenoid-controlled valve for the nebulizer. SL2 controls a flow rate with neelde valve NL2 in case of the expiration by Solenoid-controlled valve for the continuous flow and passes dense fog.
As for the exhalation-valve drive circuit, both machines are common. It adjusts PEEP pressure with PEEP needle valve NL5. It is changing the pressure which closes an exhalation-valve with exhalation-valve solenoid SL3. Note is necessary because it doesn't consume gas but however, consume gas at the time of power off at the time of power off when PEEP is set because it is omitted in miniVent-3 because Solenoid-controlled valve was provided in front of the PEEP pressure adjustment mechanism in KV-3.
4. The operation (Figure ; Operating panel of miniVent) (Figure ; Patient circuit of miniVent)
It sets an oxygen concentration, a mode, intake time, an air changes per hour, trigger sensitivity (the pressure trigger) by the arrow on the operating panel. The taking air quantity of ventilation turns and sets a dial. This dial adjusts a neelde valve but the rotation angle becomes the mechanism which is told to the control board in the electronic signal and is displayed as the taking air quantity of ventilation. If setting the upper limit, the minimum of the alarm of the airway pressure, it is possible to operate for now. PEEP sets with the control while it sees an airway pressure. Note is necessary because however, consume control gas at the time of power off when setting PEEP.
When pushing * on the panel and a caution draft limen key at the same time for equal to or more than 1 second as the extension facility, there are an alarm upper limit of the airway pressure, a function to do a minimum in the automatic setting automatically.
5. The monitor, the alarm
It is equipped with the falling of the anaerosis alarm (the fixation in 15 seconds ,) battery, the AC power blocking-off, the distributed-gas pressure malfunction, the airway pressure, the "NADONO" alarm. An airway pressure is displayed by the bargraph.
6. The maintenance
It does a feature check regularly. It charges in built-in battery every 6 months of 3~. It does maintenance regularly.
7. The fault
1) When seeing miniVent-3 as the conveyance business, it is an advantage in the direct light weight of the main unit. However, depending on the status, the weight of the circumference machinery and materials increases because there is little battery operating time, to be few and there are many oxygen demands.
2) However, at the time of power off, when setting PEEP, it isn't rational to consume gas. At the time of off, it should lay down the mechanism which blocks off gas with control. If anything, it had better omit PEEP mechanism.
3) miniVent-3 is halfway like a performance, to be few. The corresponding competence to CPAP is lacking decisively because it supports a spontaneous-respiration by SIMV and CPAP with the continuous flow but there is not a reservoir bag. There is much consumption of gas when using a continuous flow. Probably, there seems to be many cases to be supplying with the oxygen bomb at the small-to-medium-sized hospital which is a main customer but in the case, note of the boiling of oxygen's being broken is necessary.
4) miniVent-3 decreases by the air quantity of ventilation with the load at the time of the gas mixture.