VIASYS
T Bird AVS,VSO2,VS
1. The characteristic (Figure ; Outward appearance photograph of T Bird)
Response was quick, there was flexibility which can respond to a wide range of ventilation requests of the patient and it thought that the mechanism to control a compressed gases source with the intake valve to and to make intake dense fog occur to it is the standard feature of the resuscitator. However, there was proved not to be an inferior in the mechanism to drive a turbine with the electric motor to and to make intake dense fog occur to it at all compared with the intake valve method by T Bird of Bird Inc.. It hears that the control technique of the jet engine is diverted to the turbine technology but a surface with the good America style which moves freely by completely different field brain's seeking a company, industry and the environment to invest development costs in beyond the fence is embodied by this resuscitator. The high flow rate, the high response which doesn't need air plumbing in the beneficence of this novel mechanism, the resuscitator which is low in cost and is removable were realized. The AVS model is the best model of "HURUOPUSIYON" and has all options such as VAPS and PCV, graphic display compatible. In VSO2, it is limited to the chic feature of the bay and the option of the square wave is omitted from VAPS, PCV, the expiration fold, MIP/NIF, the intake pose, the intake corrugation. VS is for the home and a digital blender for the oxygen concentration control is omitted. However, SIMV+PSV+PEEP is possible even if the basic mechanism and the performance of these equipment are VS, being the same. The applicable point is the maximum characteristic of T Bird without switching a resuscitator from ICU to the home in the general ward and then just as it is without changing to ICU from the ambulance with one piece of equipment in this way.
2. The performance
1) The mode that it is possible to use
Control/Assist
SIMV+PSV
CPAP(PSV/PEEP)
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+ VAPS (SIMV, the Assist/Control mode)
+ PCV (SIMV, the Assist/Control mode)
+PEEP
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2) This proximal dater
The si stem operation interval time .4 ms
The maximum intake gas flow rate
The active-ventilation .140LPM
PSV. .180LPM
The intake gas slew-rate ?L/s2
The number of the maximum active-ventilations 80 BPM
The maximum SIMV number of times 80 BPM
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3. The control circuit, the controlling mechanism
1) The outline of the controlling mechanism
At the main processor, it is intel 386 In EX(48MHz), 80C32 is used for the I/O processor. A turbine, an exhalation-valve, a display are intensively controlled by these.
2) The characteristic of the mechanical mechanism
A new Mattick circuit is composed of single pure itself from the blender, the turbine, the exhalation-valve and three pressure sensors. The time lag exists hardly in the turn rise of the turbine but it finds that the inspiratory-pressure rises straight with the passage of time when seeing with the graphic display, being gentle compared with the intake valve method, to be few if saying strictly. It becomes equal to making the resuscitator which has a standing-up time (rise time) regulating function just like comparatively rapid setting. It reflects the excellence of the control system, it admits an overshoot hardly and it pictures a beautiful pressure curve. To admit an increased pressure to the slightness tends in the end of the end-of-suction but there are generally few machines which can do ˆ³§Œä fully.
3) The gas flow rate measurement
a) The side of intake
An intake gas flow rate is fixed by the number of rotations of the turbine and the gas compression quantity in the turbine. The delta-pressure sensor is preparatory to fix gas compression quantity in the turbine. The capacity which the turbine sent can be correctly estimated because the turn of the turbine is a optical encoder and is detected.
b) The side of the expiration (Figure ; Explanation of exhalation-valve of T Bird)
The sensor which was united with the exhalation-valve body is preparatory. Specified with the optical code in the connector part of the sensor of the proofreading information which was measured at the factory every each sensor with the sensor of the delta-pressure type which used variable caliber product film (Variable orfice membrane) The characteristic of the sensor doesn't change even if it uses multimillion cycle equal to or more than. It doesn't understand an apparently, but the kind of the sensor depends on AVS and VSO2 and for AVS, the better one of the precision is used.
The exhalation-valve body puts a diaphragm, pushes, turns a few exhalation-valves to the right only and can attach them. It is careful because it has done a leak and the airway pressure doesn't rise at all when putting a diaphragm in the opposite direction.
4) The intake valve
It is the turbine that is equivalent to the intake valve and all ventilation modes are created by the turn of the turbine.
5) The expiration valve
It is the method which does a valve membrane at the direct-drive with the electromagnetic driver.
4. The new Mattick circuit (Figure ; New Mattick circuit of T Bird)
The addition of oxygen is adjusted by the combination (the digital blender) of ON/OFF of Solenoid-controlled valve which was adjusted to five kinds of flow rates to become a desired oxygen concentration. Fresh air and oxygen are mixed by the accumulator/the diffuser before entering a turbine. This gas becomes intake gas and a bias style with the turn of the turbine. Expiratory-phase however, it is making the continuous flow of 10LPM occur but in the inspiratory-phase, a roll control is done according to the mode of the ventilation of VCV, PCV, PSV "NADO" by the turbine. The roll control of the turbine is quite exquisite because the standard is a dwindling wave in VCV and the flow rate *of* where PCV, PSV are needed by the airway pressure changes. Few high-powers, rapid rotation motors of the inertial mass are used but the motor for the turbine-drive requires the voltage which is high comparative-ly, 48 V of substitute DC. The electromagnetic driven does an exhalation-valve with the direct-drive to the exhalation-valve film. The excessive pressure opening valve is preparatory to relieve an abnormal fluid pressure. It is possible to set relieving pressure in the range of 20-130‡pH2O with the driver from the front panel surface.
5. The control software
1) The trigger formula
A float rigger is adopted. In the average, the base flow of 10LPM is set but it is possible to set in 10-20LPM.
2)ASSIST/CONTROL
It is the same as usual sCMV. In the average, it is a dwindling wave but in the model above AVS, the square wave, too, can be chosen. AVS III can choose VAPS, PCV in the active-ventilation.
3)SIMV
The trigger window is a variable-time method. AVS III can choose VAPS, PCV in the active-ventilation.
4)PSV
The end-of-suction end recognition condition in PSV is 25% of the peak rate of flow. In the maximum intake time, it is limited to 3 seconds.
5)PCV
An active-ventilation is done by the pressure ventilation when setting a PC level. In the ASSIST/CONTROL mode, it becomes PCV and in the SIMV mode, it becomes SIMV(PCV). However, in case of being being "DURE", the display (the set value) of the air quantity of ventilation gets for the in to be active and shows not to be quantity ventilation. It returns to the quantity ventilation when making a PC level off. When adding VAPS, the display of the air quantity of ventilation and the display of the PC level become active.
6)VAPS(Volume Assisted Pressure Support)
Only AVS is available. VAPS is the new ventilation mode to have piled up Volume ventilation and PSV. This effect can not be actually felt because the control system isn't good in Bear-1000 but it is possible to embody the concept which this mode has excellently by AVS. For the details, it refers to the concept of the II. artificial respiration mode and chapter of general plan 13.VAPS.
7) The anaerosis back-up
When the set value (it is possible to set to 10-60 seconds it) lapses by anaerosis time (Apnea interval), the anaerosis alarm sounds and Assist/Control method is ventilated by the back-up air changes per hour (12-revolution-per-minute or setting air changes per hour being "DURE" or the bigger one) by it. After that, the alarm stops automatically and returns to the original ventilation condition if the spontaneous-respiration detects the twice continuously and moreover the expiration air quantity of ventilation is equal to or more than 50% of the setting taking air quantity of ventilation. It returns to the original ventilation condition even if it pushes alarm sound deadening/the reset button.
8)SIGH
The intake flow is as the same, and the intake time becomes 150% and once or SIGH is stored in 100 pieces of breathing once (either earlier one has priority over) more for every 7 minutes by 150% of air quantities of ventilation. Also, maximum Sigh pressure alarm (Sigh pressure limit) gets for highest-pressure (Pressure limit) "NO" 1. to be quintuple.
9) Battery drive
It is possible to drive for about 5 hours with the special battery (DC 48v) of the option for about 1 hour in average built-in battery -.
10) The dater output
RS The dater can be output at 232.
11) The PEEP revision (PEEP compensator)
Based on the error with airway pressure and standard PEEP/CPAP pressure, it adjusts the aperture of the exhalation-valve with the servo control for an exhalation breathing resistance to be minimized regardless of the expiration gas flow rate and also for PEEP/CPAP pressure to be correctly maintained.
6. The operation system (Figure ; Operating panel of T Bird)
The other numeral display shows to be in the setting standby condition, becoming dim when pressing and choosing a desired item. It turns a setting knob and it enters desired value. It pushes the item button again and it fixes value. The lock mechanism can be hung on the setting knob, too. An active-ventilation is done in PCV when setting PCV level and the numeral display of in's being active and becoming disappears in the setting of a taking air quantity of ventilation. The set value of the taking air quantity of ventilation and the PCV level becomes active when making VAPS on.
7. The monitor, the alarm function
There is a following item.
(1) High-pressure (5-120cmH2O)
(2) Low peak pressure (off, 2-60cmH2O)
(3) The low expired volume per minute (0.1-99.9 LPM)
(4) The hypernoea (off, 3-150 revolutions per minute)
(5) The anaerosis (10-60 seconds)
(6) The gaseous-oxygen pressure malfunction
(7) Equipment's being mal-function, power failure, distributed-gas pressure's being extraordinary
(8)
8. The display feature
VS, VSO2 put on 1 item by the numeral display while scrolling an item with expiration expired volume per minute, taking air quantity of ventilation, fruit breathing rate, I:E ratio, peak airway pressure, average airway pressure, PEEP pressure. In AVS, it is possible to display in the static-compliance, the intake time, too. In AVS, 3 items can be displayed at the same time because the display is big.
It is possible to be equipped with HAWKEYE of the option to AVS and it puts on 2 corrugations with the graphic presentation out of the airway pressure, the air quantity of ventilation, the flow rate to the case. Also, the pressure/the volume, the flow/volume curve, the various trend, the numeral display of the set value of all items, the numeral display of the actual measurement of all items, too, can be displayed.
9. The patient circuit composition, the humidifier (Figure ; Patient circuit of T Bird)
In addition to that the construction resolution is easy with the crystal of in general formed hi-tech, the response of the exhalation-valve and the precision of the sensor, too, are excellent about the exhalation-valve and Fluothane Sir. It is a best even if it evaluates in all the viewpoints. As for the heating humidifier, generally, the product of the F&P Inc. is attached.
10. The maintenance
1) The bacterial filter
The filter can only be an autoclave. It is possible for liquid medicine and the autoclave to sterilize because it isn't strong but the sensor of the flow measurement unit of the expiration withstands heat and a chemical physically.
2)ŒÄ‹C•ÙŽü•Ó
It exchanges an exhalation-valve film if damaging it. The expiration flow measurement unit can bear tens-of-thousands-of-cycle use.
11. The regular inspection
1) It is "TO" in 500 hours.
It washes and it sterilizes an air entry filter.
2) It is "TO" in 5,000 hours.
It receives regular inspection.
3) It is "TO" in 20,000 hours.
It receives an overhaul.
12. The fault
(1) The noise of the digital blender for the oxygen concentration adjustment is quite harsh with the ticktick.
(2) Because the permission upper limit with oxygen entry pressure is low comparatively, at the facilities which are a part with the high pressure of the oxygen plumbing, it is necessary for the regulator to decompress.
(3) It is difficult to consent to one with the big price difference of both about whether or not AVS is too high or whether or not VSO2 is too inexpensive.
(4) That the base line of the volume curve of the graphic display gets not to return to original though there is not a leak in the patient circuit is often admitted. It solves when proofreading Fluothane Sir. However, "NODE", the trigger mechanism as it is not are estimated to be being able to do a powerful drift measure when the trigger sensitivity can do an influence.