1. The characteristic (Outward appearance photograph of figure Legend air)
LEGENDAIR is a resuscitator for the home for the patient who has a spontaneous-respiration with the equal to or more than 5-Kg weight which is made by the French AIROX Inc.. The high-precision control of flow which depends on the flow transducer which is small light weight but was had by the easy-to-use interface, and the eclectic ventilation mode, intake and the expiration is a characteristic. Contrary to the image to receive, outward appearance "YORI" it is rather applicable high efficiency and advanced function machine in the critical "NA"Ç example at the ward, too. It is suitable for the movement, too, because NIPPV, too, is possible and it is possible to operate for approximately equal to or more than 6 hours by built-in battery. Of course, the universal dual-current power can be used. 1,780,000 yen of price
2. The performance
The mode .PSV S/ PSV S/T
CV/ACV = A/C(volume control)
SIMV = SIMV(volume control)+PSV
+ Target Volume (Only the pressure ventilation mode)
The taking air quantity of ventilation .50-1,400m
The intake gas flow rate .200 LPM
Breathing number of times .4-60BPM
The intake time .0.5-3.0 sec.
EPAP. .4-15‡pH2O
IPAP. .4-30‡pH2O
The weight .2.7 Kg
The power consumption .AC100v 90VA max. , DC24v 80VA max.
The battery operating time About 6 hours (500ml*15BPM, IPAP 30mbar)
3. The outline of the mechanism (Figure ; Structure of Legend air)
It is the method to make intake dense fog occur to with the low inertia microturbine which depends in the motor drive of the DC whisk less. An intake gas flow rate is basically fixed by the turn of the turbine. In the inspiratory-phase, at the normal condition, there is not a leak in the exhalation-valve and all occurring intake dense fog becomes intake quantity. Therefore, the turbine number of rotations changes roughly in intake and the expiratory-phase, the setting, the ventilation mode and so on. As for the exhalation-valve, a driving-pressure is adjusted with the proportional piezo valve. The piezo valve is Solenoid-controlled valve which applied a piezoelectric effect. Way, the piezoelectric effect is a valve with the volume which is in the graduate-acting control using the device (the crystals such as Rochelle salt) which has the characteristic to change when transmitting electricity. By the electric current to have applied to the electromagnet which is called a Solenoid-controlled valve ( coil to such an use generally Make magnetic force occur and valve ) which controls the degree of the valve of the opening and shutting by this magnetic force is used, but it applies voltage to the piezo-electric device which has a piezoelectric effect and it is the piezo valve that is controlling the degree of the valve of the opening and shutting by the volumetric change of this device.
Reference : Actually, a piezo device is widely used generally and for example, it is used for the earphone of the cheap radio, too. As the characteristic of the piezo device, the relation between the voltage and the displacement of the piezo device is not proportional connection and draws a curve which is called "the hysteresis curve". Therefore, when using a piezo device as the driving-source, the variation doesn't become the same even if it applies the same voltage. In other words, only in the control of the voltage, it isn't possible to do the reappearance of the variation. Because the efficiency of the variation to the substitute drive electric power is good, it gets to do can with the well head drive. Therefore, as for the earphone for the HiFi audio of iPOD "NADO", even if the efficiency to the electric power is bad, being small, being numerous, the electromagnetic type which the variation is proportional to to the voltage which was added based on the design philosophy of the timbre priority is used. On the other hand, as for the piezo-electric type, the earphone of the piezo-electric type is used by the radio that the reproducibility is bad but that it is cheap a little because it is efficient. However, because the technology to make constant-ize an amount of displacement with being always effective in measuring an amount of displacement with the displacement sensor and feeding back error quantity into the drive voltage established the fault that the reproducibility is low in recent years, it always got to do the can with to be high-precision and moreover the amount of displacement decision by the high resolution.
4. The operation (Figure ; Operating panel of Legend air)
A welcome menu screen is displayed when making a power on (Figure ; Welcome page). After that, it becomes a stand-by state and the setting of a shut down period is displayed last time in the screen (Figure ; Being a setting screen last time). A screen-display is composed of two screens. It is a ventilation parameter screen and an alarm screen. The change of the screen becomes the following screen in case of its making the cursor of the up down move and moving it beyond the upper end or the bottom tip of Menu screen. The screen-display can be instantly changed when pushing a direct menu key. It moves a cursor to the item to want to change setting into, it fixes an item with the key of being fixed, it enters a necessary mode and value with the up down key after that and it fixes them. The ventilation starts when pushing a start-key on the front panel. The ventilation starts as soon as start-key's pushing this key welcome menu screen-display among them in the validity. The panel lock operates when it presses both of the up down key at the same time for equal to or more than 6 seconds and continues them. In the pending-lock, the change of the parameter passes away with to do it being possible. It does by the operation to continue by pressing cancellation, too, for equal to or more than 6 seconds.
1) The mode
PSV is the same as general PSV almost. The maximum in the intake time is 3 seconds. The anaerosis back-up (PSV begins in the time cycle) can be set when setting Back up R and Apnea time.
This, too, is the same as general PCV almost. It becomes PRVC mode when setting Target Vt. IPAP pressure is automatically controlled for the taking air quantity of ventilation to become a set value now. It is possible to make a trigger feature to be off, too, when controlling Trogger I.
(3) CV/ACV
This mode is the quantity ventilation mode to be called Volume Control generally. CV means Controlled Ventilation and ACV means Assisted Control Ventilation. It becomes CV when making trigger sensitivity off.
(4) SIMV
The trigger window of SIMV is a variable-time method. It is composed from the active-ventilation aspect by quantity ventilation (VCV) and the spontaneous-respiration aspect by PSV. It is the air changes per hour to set in the back-up number of times (BUR) and active-ventilation (VCV) is done when there is an anaerosis. When detecting a spontaneous-respiration, it does an automatic-reset from the back-up condition to SIMV.
2) Trigger I, the trigger sensitivity
Trigger sensitivity is displayed with Trigg I. A trigger is done in the one which met either of the flow rate and the pressure trigger condition with a step of 1~5 there being. It changes in the range of 3.0 seconds of 0.7~ in the least expiration time, too.
Level 1 3.5LPM or -0.3mbar
Level 2 4.0LPM or -0.5~0.7mbar
Level 3 4.5LPM or -0.6~0.8mbar
Level 4 4.5LPM or -0.7~0.9mbar
Level 5 4.5LPM or -0.8~1.0mbar
3)Rise Time
Rise Time is the function to control the time that the inspiratory-pressure stands up in case of pressure ventilation. There is this, too, to level 1~4. The value is relative and as the set value, it doesn't always become. In the brackets, it is permissible intake time.
Level 1 0.2 seconds (0.7 seconds of 0.2~)
Level 2 0.4 seconds (1.0 seconds of 0.4~)
Level 3 0.6 seconds (1.2 seconds of 0.6~)
Level 4 0.8 seconds (1.5 seconds of 0.8~)
4)Trigger E
This is generally displayed at the rate to the peak rate of flow by the feature which is called "HURO-TA-MINE-SIYON". Trigg E becomes valid after the least intake time which is prescribed by the setting inspiratory-pressure or Rise Time passes. Moreover, intake time is limited by 50% of values of the respiratory-cycle time of a maximum of 3 seconds, the future ventilation.
5)Back up R
It is the function to set the back-up air changes per hour which is done when the anaerosis continues. It is possible to make off, too. Anaerosis time Apnea Time can be set, too. It is possible to choose in the range of 30 seconds, 180 seconds of BUR~/BUR. The default is 60 seconds/BUR in Auto.
6)Target Vt
In the pressure ventilation mode of PSV and PCV "NADO", the goal taking air quantity of ventilation can be set. This feature changes to VS and the PRVC mode respectively. Maximum-inspiratory-pressure IPAP maxi must be set.
It means an intake flow rate pattern in the quantity ventilation mode. R is a square wave and D is a dwindling wave.
SIGH VOLUME and SIGH RATE can be set when making on.
5. The monitor, the alarm
As for the airway pressure, a bargraph is displayed. , It monitors the actual measurement of the intake and expiration taking air quantity of ventilation, the air changes per hour, FiO2 and it displays value. These items are watched over with the alarm in the upper limit and the minimum. Besides, an error message is very, that the equipment is mal-function displayed. An alarm is classified into 5 steps by the importance. In the more dangerous status, the continuative sounds, the red LED blinks and the display blinks, but the alarm sound, too, doesn't sometimes sound if not being critical "NA"ó‹µ, too, and there is only a message display.
6. The patient circuit (Figure ; Patient circuit single brunch, figure ; Patient circuit double brunch)
The single brunch and the double brunch can be used. In case of single brunch, it isn't possible to do the flow measurement of the expiration.
7. The maintenance
It exchanges an air inlet combination filter by equal to or more than 1 degree to 1 month. It does a feature check regularly. Also, it does the check, the exchange of the filter. It is possible to easily do the maintenance which is certain degree of when using a maintenance screen (Figure ; Maintenance screen). Built-in battery, too, checks a charge mode once in the moon using the maintenance menu. As for the maintenance menu, because a setup-screen is displayed when making power on while pushing a start-key, “ü is necessary from there from the condition of power off. It does maintenances such as the calibration equal to or more than once with the serviceman of the IMI authorization in 1.
8. The fault
1) To enter the setting of a parameter directly is complicated but it is possible to call that it isn't possible enter to be a specification, too, when thinking of being for the home.
2) Because the panel lock is too simple, this place should change into the password method.
3) A menu display by the display isn't localized in Japanese.
4) That the outside DC power is 24 V is usage "ZURAI". It is the place to want as 12-V compatible by all means.