Inc. eye vision
1. The characteristic (Figure ; Outward appearance photograph of CLV90)
Because Inc. eye vision was the company which was supplying to do boiling CLV50 and CLV70 a Inc. eye mosquito in OEM but the eye mosquito Inc. was bankrupt immediately after CLV90 development, it is the time which was sold by Kimura medical department instrument Corporation by another name that ALV2000 becomes, too. After that, the "ANESU" Inc. which the former employees in the eye mosquito Inc. established by getting support of the AIR WATER Inc. sold CLV90. At present, it comes onto the market by the brand name (CLV90 and ALV2000) with more than one identical model but after February, 19 of H, it is unified by CLV90. CLV90 is domestic BASIC model which has the feature which the resuscitators such as PCV and PSV need and it is enough and supports the intake gas of a maximum of 120 LPM with the graduate-acting control valve.
2. The performance
1) The mode that it is possible to use
The anaerosis back-up
2) This proximal dater
The maximum intake gas flow rate
The active-ventilation .120 LPM
PSV. .120 LPM
The number of the maximum active-ventilations 40 BPM
The maximum SIMV number of times 24 BPM
3. The control circuit, the controlling mechanism
1) The outline of the controlling mechanism (Figure ; Electric-control organization chart of CLV90)
CPU "MOTORO"-the 32-bit microprocessor MC68332 to be of the "RA" Inc. It is a MHz. The sampling rate with pressure is 100 revolutions per second.
2) The characteristic of the mechanical mechanism
At the factory, "the flow VS delta-pressure" and "flow VS the angle of rotation characteristic" of the valve and so on are measured about one and the data table is maintained by the flash memory on the occasion of the construction or service about Fluothane Sir and the exhalation-valve unit, the blender unit, each "NADONO" unit on the side of intake. At the time of switch on, it is doing this data table and it is compensating the RAM of the CPU for the reading in precision from each unit.
3) The gas flow rate measurement
It uses the sensor of the delta-pressure type for the side of intake. It is calibrating a zero point automatically with the rezero valve. There is not Fluothane Sir on the side of the expiration.
4) The intake valve
The main-valve is the analog valve which has a quasi-linear characteristic. About 120 of about 3 mm of that the structure is full in this pinch-valve with the pinch-valve which uses "TIYU"-"BU" of the silicone rubber which has figure of ring's prominence inside from the •Β condition It changes until the large/the minute. It is doing 3-mm opening and shutting by "BO-RUSUKURIYU"-the mechanism which does a direct-drive in direct current "SA"-"BOMO-TA".
5) The expiration valve
It is the balloon valve of the gas drive system. A servo control by the PEEP/CPAP pressure isn't done.
4. The new Mattick circuit (Figure ; New Mattick schematic of CLV90)
“ό is necessary from input port of the back and high pressure oxygen (3 ~ the pressure above 100KPa) is given to Solenoid-controlled valve SL1 via filter F1. It always excitates and Solenoid-controlled valve SL1 is open if a power is made on. The oxygen which passed Solenoid-controlled valve SL1 is 0.3 in the pressure regulator advertising ~ Decompressed by 100KPa and given to the O2/Air Brenda system unit of the side of oxygen.
Air is supplied by built-in compressor. The filter F2 of the bacteria-elimination of the protection against dust is installed in the air intake of the air compressor. The compressor is an electromagnetic vibration mode diaphragm pump. The compressor receives a phase control from CPU to keep the pressure of Brenda entrance on the secondary side at 0.3~100KPa. 10 of that there are a bacteria-elimination and an air filter F3 which has a purpose of the soundproofing in output "PO"-"TO" of the compressor and boiling out after that to smooth-ize power pressure Via the tank with large capacity, it is given to the Brenda system unit of the side of air.
Brenda is composed of two units for oxygen and air. Two units are one with completely identical kind as "HA"-"DOUEA" and BV1 (or BV2) is "NI"-the dollar valve with motor drive which gives the flow ratio of the specification which the CPU decided. The non-return valve OV1 (or OV2) of the low-resistance is provided for the side of the coming-out. Zero check Solenoid-controlled valve SL2 (or SL3) is provided for "PO"-"TO" of the pressure sensor PO2 or Pair to watch over 0.3~100KPa which is the pressure source of oxygen or air.
The main-valve is the servo valve which can adjust a gas flow rate freely with the signal of the CPU and ‘—‹C to have gone out of the main-valve reaches a main block after passing "HURO-SENSAYUNITUTO". An united limiter valve is installed in this block in the overpressure relief valve and the inhalation relief valve of the spring grotesque-the "DO" method. The side of the overpressure is about 90 hPa(cmH2O) and including the opening, the side of the negative pressure begins opening by - 7hPa(cmH2O). A patient airway pressure is measured through Solenoid-controlled valve SL6 for the zero level merit at this block. The output of the main block is ‘—‹Ced to the patient via the bacterial filter of the external.
The flow measurement uses meshes with 100-ƒΚ pace as the resistance in the flow channel, and it measures, "RINIYARAIZU"s the delta-pressure which occurs in mesh way and it gets a flow value. The delta-pressure is about 15 hPa(cmH2O) degrees in 120LPM and Solenoid-controlled valve for the auto zero to cancel zero drift is combined.
When making a nebulizer on, the nebulizer-the pump became on and an oxygen concentration was set by Brenda. The gas of 0.3~100KPa(‡sf/cm2) is supplied to the nebulizer-the pump, is pressurized here above 0.8~100KPa(‡sf/cm2) and is supplied to the nebulizer output via Solenoid-controlled valve SL9 for the operation which opens only at the time of ‘—‹C of the active-ventilation.
The exhalation-valve control circuit, and in the PEEP unit, it branches and it makes the part of the air gas that a style was pressed by 0.3~100KPa(‡sf/cm2) the control driving-pressure of the exhalation-valve. One piece of branch-off of this pressure sets pressure in "NI"-at dollar valve CV3 and in CV4 and is given to the exhalation-valve via Solenoid-controlled valve SL8 of the exhalation-valve with control. The other branch-off is emitted in the big worrying through the series circuit of "NI"-dollar valve CV1 and CV2. "NI" which is contained in the PEEP unit-dollar valve CV5 are included in CV2 in parallel. When the pressure of the point of intersection of CV1 and CV2/CV5 connects with Solenoid-controlled valve SL7 and PEEP/CPAP is added, it is given to the air exhaust of SL8 from SL7 by the expiratory-phase. CV2 specifies the control pressure when CV5 is blockaded, i.e. PEEP/CPAP is maximized.
5. The control software
1) The trigger formula
It is a pressure trigger formula. It is possible to choose in off-1~-10hPa. But, it is fixed on - 1‡phPa by the spontaneous-respirations such as PSV.
A/C of CLV90 means only sCMV of the quantity ventilation. 0.3sec is added when the intake pose chooses EIP.
3) SIMV (Figure ; Explanation of SIMV logic)
A trigger window is provided for the part of 40% of ends in the SIMV cycle time by the fixed time method. When detecting a trigger during the period of the trigger window, an active-ventilation is sent. When not detecting a trigger, an active-ventilation is sent when a trigger window is ended. PSV is sent to the trigger except the trigger window. Until twice of time of the setting intake time (the active-ventilation) pass from the time which the PSV ventilation began in as the exceptional processing, it is delayed in the active-ventilation in the trigger window.
4) PSV (Figure ; Explanation of PSV)
PSV can be chosen only in the SIMV mode. It becomes pure PSV if making the SIMV number of times 0BPM. The end-of-suction end condition is as the following.
(1) The intake time exceeds 2 seconds.
(2) The flow rate is 6 since then of 0.2 seconds after the inspiratory-phase begins It declines below L/min.
(3) The airway pressure rises since then of 0.2 seconds to setting support pressure + 2hPa(cmH2O) after the inspiratory-phase begins.
5) PCV (Figure ; PCV explanation)
PCV of CLV90 is not the meaning of used PCV generally and is near the concept of PC-SIMV. In the spontaneous-respiration aspect, PSV of 2cmH2O is given as CPAP. It is possible to make a trigger to be off, too.
6) The anaerosis back-up
An anaerosis caution watch is done when making the SIMV number of times 0BPM. It continues from 30 seconds to 30 seconds of generating an anaerosis caution when there is not a spontaneous-respiration trigger by the controlled-respiration (A/C) of fixation parameter (TV=400,RR=10 ,I/E=1:2 ). After that, it returns to the spontaneous-respiration mode once again. It stops a caution when recognizing a spontaneous-respiration and it gets back to normal. However, if the apnea which exceeds 30 seconds once again occurs, it waits for the intervention of the medical practice person while executing breathing of the fixation parameter continuously. In the other day, the caution lasts as far as there is not intervention.
It is possible to add at all dominant modes. The frequency is a 2-revolution-per-hour fixation. When SIGH is added, SIGH is added to the active-ventilation from which the LED (Midori) in the upper left of the SIGH key lights up and it begins with next. In breathing mode not to have an active-ventilation, it is added in the timing of the following spontaneous-respiration. After that, SIGH is added at the 2-revolution-per-hour frequency. SIGH is A/C, SIMV+PSV.
At the time of the SIMV, CPAP, PSV mode, it gives that the 1. quintuple of the setting taking air quantity of ventilation is done (a maximum of 2000 ml) in extending setting intake time, that 1. is quintuple (a maximum of 2 seconds). At the time of the PCV mode, it becomes setting PCV pressure + 2hPa.
8) The nebulizer
It does an auto-stop within 30 minutes. Because it makes drive gas with pump from intake gas, it doesn't influence an air quantity of ventilation and an oxygen concentration.
9) The response
It is selectable more than 3 steps. It changes the time constant of the servo control and it is changing a reaction rate.
6. The operation system (Figure ; Operating panel of CLV90)
It chooses a mode from A/C, SIMV+PSV, PCV. A/C is sCMV generally. In the SIMV+PSV mode, with the setting of the SIMV number of times and PSV pressure, it becomes the SIMV, SIMV+PSV, PSV, CPAP mode. The PCV mode corresponds to the mode to be called PC-SIMV generally. Now, PSV isn't added.
After that, it sets necessary items and option functions (SIGH, and so on,) such as the air changes per hour. In A/C, it sets I:E ratio but in the other mode, it sets intake time. PCV mode however, in SIGH addition, it sets a taking air quantity of ventilation. Next, it sets an alarm.
7. The monitor, the alarm function
There are an anaerosis, an airway pressure (the minimum and the upper limit), distributed-gas pressure, an alarm of the power failure. An airway pressure, and a set-pressure, alarm pressure are displayed by the liquid crystal bargraph.
8. The display feature
It displays an airway pressure by the liquid crystal bargraph. It puts on an intake expired volume per minute, too, by the numeral display.
9. The patient circuit composition, the exhalation-valve
A patient circuit was shown in the figure (Figure ; Patient circuit of CLV90). It washes an exhalation-valve in the resolution (Figure ; Exhalation-valve structure : Resolving as shown in figure and doing a wash and sterilization).
10. The daily maintenance
The autoclave sterilizes an exhalation-valve after resolving. The filter of the side of intake exchanges only an autoclave in the accumulation operation 2,000 hour by hour of being possible, 25 times of sterilization. It exchanges an exhalation-valve when the leakage occurs in about 20-time sterilization check. It exchanges the inlet filter of the air compressor in the accumulation operation 3,000 hour by hour.
11. The regular inspection
For 5,000 hours, for 10,000 hours, for 15,000 hours, regular inspection young "SIKU" receives an overhaul to 20,000 hours. 5,000 hours and 15,000 hours become a test check by the simple level, to be few. It becomes the overhaul which contains the exchange of the main abrasion part, the degradation part at 10,000 hours and 20,000 hours.
12. The fault
1) Note is necessary because used meaning of and a little the mode names used are different generally.
2) There is danger that a caution isn't done even if it becomes a hypoventilation with the leak and so on because there is not Fluothane Sir of call feeling ‘ͺ.
3) Air from the air plumbing can not be used because it is convenient in compressor built-in but there is not an external input terminal even if it is the environment which the air plumbing can be used for.
4) In the design philosophies such as the concept of the mode and the processing method in case of the oxygen-tension decline, it notices a few senses of incongruity. However, it is possible to have a good impression to the corporate posture which makes public information tightly.