Model 105 Resuscitator Blender Unit P and E Type Operation Manual May 2011

INTRODUCTION This Operation Manual deals with the specifications, operation and maintenance of the Blender Unit P Type and Blender Unit E Type. Atom is by no means responsible for any malfunction arising from a user ignoring the instructions for operation and maintenance described in this Manual as well as for any accident attributable to repair by someone other than technical personnel belonging to or authorized by Atom. Read this Manual carefully and familiarize yourself with its contents before operating the unit. Keep this Manual where it is readily accessible for reference when needed. If any technical problem should arise, please contact your local Atom representative.

CAUTION This product is shipped without being disinfected or sterilized. Be sure to clean and disinfect the unit before using it for the first time after purchase.

The Blender Unit P type and the Blender Unit E type are provided with the following two functions: the suction unit and the oxygen-air mixed gas supply unit. The suction unit suctions amniotic fluid from the infant’s trachea when a suction tube is connected. The oxygen-air mixed gas supply unit supplies the mixed gas, whose oxygen concentration is adjusted to a desired level by the oxygen blender, at an appropriate flow rate to a Jackson-Rees circuit or an oxygen mask. The oxygen-air mixed gas supply unit has two outlets which can be used for different purposes. The built-in pressure meter, when connected to the pressure port of a Jackson-Rees circuit, etc. via a tube for pressure measurement, is used to measure the internal pressure of the circuit. Depending on the piping system of your facilities, either the piping type suction unit or the Venturi type suction unit is available. Check the type of your Blemder Unit and see the sections related to your unit.

1

INTENDED USE The Blender Unit P Type and Blender Unit E Type are intended to remove secretions from the neonatal airways or to provide blender air and oxygen at a desired oxygen concentration in the range of 21~100% to a respiratory assist device connected to the patient such as a ventilator (including a manually operated one) and an oxygen tent.

SAFETY INFORMATION Instructions to ensure the safe operation of the unit are found throughout this Manual. Please read the Manual carefully before operating the unit. Please follow the instructions when operating the unit.

Basic Instructions 1. Follow the instructions for the safe use of the unit. Follow the operating instructions described in this Manual for the safe use of the unit. 2. Inspect the unit on a periodical basis. Periodical inspection is needed to use the unit in the optimum condition. 3. Never use the unit if it is found to be defective. If any damage or malfunction of the unit should be noticed, stop using it immediately and contact your local Atom representative.

Definitions of Warning Indication Three levels of warning indication are used throughout this Manual and on the unit. They are defined as follows. A DANGER notice indicates an immediately hazardous situation which, if not avoided,

DANGER: will result in death or serious injury, serious damage to property such as total loss of use of equipment, or fire.

A WARNING notice indicates an indirectly (potentially) hazardous situation which, WARNING: if not avoided, will result in death or serious injury, serious damage to property such as total loss of use of equipment, or fire. A CAUTION notice indicates a hazardous situation which, if not avoided, can result in CAUTION: minor or moderate injury, partial damage to equipment, and loss of data stored in computers.

2

Definition of Symbols 1. Symbols to indicate danger, warning or caution Symbol Title and indication General attention Indicates unspecified general danger, warning or caution.

2. Symbols to prohibit action Symbol

Title and indication

General prohibition Indicates unspecified general prohibition. Prohibition of disassembly Indicates prohibition of disassembly of the unit where it may cause an electric shock or other hazards. Prohibition of use of fire Indicates prohibition of use of fire where an external use of fire may cause the unit to ignite under certain conditions. 3. Symbols to give instructions for action Symbol

Title and indication

General instruction Indicates unspecified general action on the part of the user.

4. Symbols of international standards (IEC) Symbol

Title and indication

Date of manufacture Indicates the date when the unit was manufactured in the factory. WEEE symbol In the EC area, an electrical and electronic product falling in one of the categories specified by “DIRECTIVE 2002/96/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 27 January 2003 on Waste Electrical and Electronic Equipment (WEEE)” should be disposed of in a manner consistent with relevant laws and regulations. This symbol indicates that the above-mentioned requirement applies to this product. 5. Other symbols Symbol

Title and indication

Suction function Indicates the suction function or the piping of the suction system.

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WARRANTIES This equipment is guaranteed by Atom Medical Corporation to be free of any defects in both materials and workmanship for a period of one year from the date of delivery when used normally for its intended purpose. Any parts of this equipment proving to be so defective will be repaired or replaced at no charge during the warranty period. In the following cases, however, actual expenses need to be paid even during the warranty period. (1)

Wear and tear of expendables

(2)

Trouble and damage due to improper handling, such as dropping the unit during transport or transfer

(3)

Trouble and damage due to a fire, salt, gas, extraordinary voltage, earthquake, lightning, storm and flood, or other natural phenomena.

(4)

Travel expenses in the case of a trip to an isolated island, a remote place, etc. for the purpose of repair

Any damage incurred in transit should be reported promptly to Atom accompanied by the certificate of the carrier concerned. All correspondence concerning the equipment should specify the model name and the serial number.

WARNING Atom is by no means responsible for compensation for death, injury or damage to property if such loss should occur due to any of the following causes. 1. Trouble or damage due to installation, relocation, maintenance or repair by someone other than: • technical personnel employed by Atom • a sales representative of Atom • an installation company authorized by Atom. 2. Trouble or damage to Atom products caused by a product of another company that is not supplied by Atom. 3. Trouble or damage due to modification, maintenance or repair using a part other than that specified by Atom. 4. Trouble or damage due to neglecting the operating precautions or operating instructions described in the Operation Manual of the unit. 5. Trouble or damage due to operation under ambient conditions, including electrical requirements and installation requirements, other than those described in the Operation Manual. 6. Trouble due to carelessness or improper modification. 7. Trouble or damage due to using a device sold or repaired by a secondhand goods dealer or a repair shop without notifying Atom. Trouble or damage due to using a device sold or repaired by the above dealer or shop without following the instructions specified by Atom. 8. Trouble or damage due to using the unit connected to a peripheral device which is not specified by Atom, which does not meet the applicable requirements of IEC-60601-1 and IEC-60601-1-1, or which is not equipped with equivalent safety features.

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Responsibility for Care of Equipment

It is the user (a hospital, a doctor’s office, a clinic) that is responsible for the operation, maintenance and care of the electric equipment for medical use. The equipment should be used only by medical personnel.

Prohibition of Modification

Do not disassemble or modify the unit. Otherwise, a fire, an electric shock or injury may result.

Periodical Inspection

Proper periodical inspection is needed to use the unit in the optimum condition.

In Case of Trouble

If any abnormal condition or trouble should occur to the unit, indicate on the unit that it is out of order and contact your local Atom representative or service engineer immediately. If any abnormal condition or trouble should occur, do not use the unit until it has been repaired completely by a service engineer so as to prevent possible danger.

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INTRODUCTION... 1

[6]

6-1. 6-2. 6-3. 6-4.

PLEASE READ WITHOUT FAIL [1]

DANGER... 8

1-2.

WARNING... 8

1-3.

CAUTION... 11

Parts Identification... 12 2-1. 2-2. 2-3.

Front Panel... 12 Rear Panel... 13 Accessories...14

PREPARATION [3]

[7]

Inspection before Use... 34 Periodical Replacement Parts... 35 Inspection Checklist... 37 Disposal... 37

Troubleshooting... 38

APPENDIX [8]

Technical Data... 39

PREPARATION

[2]

Operating Precautions... 8 1-1.

Maintenance Inspection... 34

PLEASE READ WITHOUT FAIL

CONTENTS

Connection to the Gas Supply Sources and the Suction Pressure Supply Source... 15 3-1.

3-3. 3-4. 3-5.

OPERATION

3-2.

Connection to the Gas Supply Sources and the Suction Pressure Supply Source... 15 Piping Type... 15 3-2-1. Connecting the Hoses... 16 Venturi Type... 17 3-3-1. Connecting the Hoses... 17 Alarm Function for Gas Supply... 19 Daily Inspection... 19

OPERATION How to Use Each Component Unit... 20 4-1.

4-2.

Suction Unit... 21 4-1-1. Preparing the Suction Canister before Use... 21 4-1-2. How to Use the Suction Canister... 23 4-1-3. Disposal of Contents... 25 Oxygen-Air Mixed Gas Supply Unit... 27 4-2-1. Outlet... 28 4-2-2. How to Connect a Jackson-Rees Circuit (Example)... 30

[5]

Cleaning and Disinfection... 32 5-1.

Cleaning and Disinfecting the Suction Canister (a Compatible Non-Atom Item)... 33 5-1-1. Canister Head... 33 5-1-2. Canister (with Holder)... 33

APPENDIX

MAINTENANCE

MAINTENANCE

[4]

Operating Precautions

[1] Operating Precautions Please follow the operating instructions described in this Manual for the safe use of the unit. The unit should be operated only by those who have been trained and instructed properly in its operation. The unit should be operated only for its intended use.

1-1.

DANGER

Death or serious injury will result if the instructions given below are not followed. Do not use ether, alcohol or any other ignitable substance. Even a small amount of ether, alcohol or any other ignitable substance may cause a fire when mixed with the oxygen supplied. Analyze arterial gas levels repeatedly when a high oxygen environment is required. When the infant requires a high oxygen environment, it is extremely important and essential to periodically analyze arterial gas levels. Follow the doctor’s instructions in measuring the oxygen concentration because ignoring essential requirements may increase the risk of retinopathy of prematurity and other adverse effects. Do not give a shock to the unit or let it hit anything. The screws or fixed parts may become loose.

1-2.

WARNING

Death or serious injury due to a fire, an electric shock or the tipping over of the unit will result if the instructions given below are not followed. Be sure to follow the doctor’s instructions in supplying oxygen. Use only oxygen for medical use. Be sure to bear in mind the following precautions during oxygen supply. • Do not place a body warmer, a flashlight, oils and fats, or flammable vaporizable matters near the unit. • Use pure cotton for the infant’s clothing, bed sheets, etc. Do not use any material that is easily charged with static electricity. • Use pure cotton or fire-proof materials for the clothing of doctors, nurses and ambulance staff who handle this unit.

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Operating Precautions

PLEASE READ WITHOUT FAIL

Bear in mind the following precautions while using oxygen supply equipment. • If oil, grease or a grease-like substance should get in contact with pressurized oxygen, a violent spontaneous ignition may occur. Do not let such substances stick to the oxygen pressure regulator, the oxygen cylinder valve, piping, connections and other parts of oxygen supply equipment. • On a high-pressure oxygen cylinder, use only a tested pressure reducing valve or pressure regulating valve indicated specifically for oxygen supply. Do not use such a valve for any gas other than air or oxygen. It is dangerous to use a valve to supply a gas other than air or oxygen and then to supply oxygen again. Smoking is prohibited in the room where the unit is installed. Do not place any possible ignition sources in the room. Use only the parts and accessories specified for the unit. Otherwise, the unit may malfunction or break down. Do not disassemble or modify the unit. Disassembling or modifying the unit may cause a fire, an electric shock or injury. Do not install the unit where it will be exposed to excessive humidity, dust or steam. Installing the unit in such a place may cause a fire or an electric shock. The unit should be serviced only by qualified personnel according to an appropriate service manual. Be sure to inspect the unit at the start of each day. Operating the unit without inspecting it at the start of each day may let a defect pass unnoticed and cause a potentially unfavorable outcome. Follow the doctor’s instructions in selecting an appropriate way of oxygen administration, an appropriate oxygen concentration and an appropriate duration of administration. Improper use of supplementary oxygen may cause serious side effects including loss of sight, damage to the brain and death. The risks of side effects vary with infants. Be sure to follow the doctor’s instructions in deciding the optimum oxygen concentration on the basis of PaO2 (a measured arterial oxygen partial pressure level). It is reported to be extremely important and essential to analyze arterial gas levels repeatedly. The oxygen-air mixed gas supply unit integrated in the unit requires a bleed function in order to maintain the accuracy of the preset mixed gas concentration over the whole selectable flow rate range. The bleed function will not work effectively unless a consistent amount of gas is flowing through the unit. Therefore, the oxygen and the air supplied to the unit are discharged to the environment at the flow rate of 2.5~3.5L/min.

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Operating Precautions

Connect the piping connecting hose or the high-pressure hose to the unit before connecting it to a medical gas supply source. If you connect the piping connecting hose or the high-pressure hose to a medical gas supply source before connecting it to the unit, a copious amount of gas will come out from the unconnected end of the hose, which will cause a danger. Be sure to connect the piping connecting hose or the high-pressure hose to the medical gas supply source after connecting it to the unit. Remove the piping connecting hose or the high-pressure hose from a medical gas supply source before removing it from the unit. If you remove the piping connecting hose or the high-pressure hose from the unit inadvertently before removing it from a medical gas supply source, air or oxygen will burst out from the disconnected end of the hose. If this should happen, close the end of the hose with your finger or thumb quickly and remove the hose from the medical gas supply source. Be sure to connect the unit both to the oxygen supply source and the air supply source. When the unit is connected only to one supply source, a pressure difference will be created, an alarm will sound, and the unit will not operate. The oxygen and the air supplied to the unit must have their pressures adjusted to 300~500kPa (3~5kgf/cm2). The pressure difference between them must be adjusted to 138kPa (1.4kgf/cm2) or less. Use an appropriate length of hoses with the unit. If the total length of hoses including the accessory oxygen supply hose exceeds 10m, a gas flow will be reduced. The oxygen concentration set by turning the knob for oxygen concentration cannot be expected to be accurate. If you want to set an oxygen concentration accurately, check it with an oxygen monitor.

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Operating Precautions

CAUTION

Injury or damage to surrounding objects may result if the instructions given below are not followed. Be sure to clean and disinfect the unit before using it for the first time after purchase. The unit is shipped without being disinfected. Do not operate the unit covered with a cloth, etc. Do not operate the unit covered with a cloth or pressed tightly against the wall. The oxygen trapped inside the unit may cause a fire.

PLEASE READ WITHOUT FAIL

1-3.

Do not expose the unit to extraordinarily high temperature or excessive humidity. Do not pour any liquid directly on the unit. Check periodically with a reliable pressure gauge that the pressures of the oxygen and the air supplied to the unit are within the specified range. When operating the unit, observe the infant’s condition continuously instead of relying on the unit alone.

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Parts Identification

[2] Parts Identification 2-1.

Front Panel ② ①

③ ④

⑤

⑤

⑥

⑥

⑧

⑦

⑩

⑨ No.

Name Knob for suction pressure Suction pressure meter Suction lever Knob for oxygen concentration

Flowmeter Knob for flowmeter Outlet Pressure meter Connection port for pressure meter Protection cap

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Function Used to control the suction pressure supplied from outside the unit. Indicates the suction pressure controlled by turning the knob for suction pressure. Used to open and close the suction circuit to control ON/OFF of the suction pressure. Used to blend the oxygen for medical use with the air supplied from outside the unit to set the oxygen concentration to a desired level in the range of 21~100%. Used to set the flow rate of a mixed gas of a desired oxygen concentration prepared by the blender to a desired level in the range of 0~15L/min by turning the knob for flowmeter. Used to set the flow rate. Discharges the mixed gas at a flow rate selected on the flowmeter. Indicates the pressure of a resuscitation bag, etc. connected to the outlet. The port for connecting a resuscitation bag, etc. to have the internal pressure of the circuit indicated on the pressure meter. Covers the protection valve for pressure meter to prevent it from being operated accidentally. This cap is used in the periodical inspection.

Parts Identification

Rear Panel

PLEASE READ WITHOUT FAIL

2-2.

Two types of rear panels are available for the Blender Unit: the piping type and the venturi type. Check the type of your Blender Unit and skip any section unrelated to your unit. Piping type

Venturi type

①

③

①

③

②

④

②

⑤

⑥

No.

Name

Function

Piping connecting hose (for oxyCompatible oxygen supply pressure: 300~500kPa (3~5kgf/cm2) gen) connecting port Piping connecting hose (for air) Compatible air supply pressure: 300~500kPa (3~5kgf/cm2) connecting port The connecting port for the suction canister through which the Outlet (suction) patient is suctioned. Inlet (suction) The connecting port for the piping connecting hose (for suc(piping type only) tion). Exhaust port Discharges the gas generated when suction pressure is created (venturi type only) by the Venturi system. Silencer Reduces the noise generated when a gas is discharged from the (venturi type only) exhaust. ✽✽ ① and ② can be connected either to the piping system of your facilities or to a gas cylinder respectively. See “[3] Connection to the Gas Supply Sources and the Suction Pressure Supply Source” for the connecting procedure.

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Parts Identification

2-3.

Accessories (The figures below show how the accessories are attached to the unit.)

②

①

③

No.

Name Function rail bracket (for the suction canister) Function rail bracket (for the humidifier bottle) Tube for pressure measurement

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Function Serves as an adapter when the suction canister is fixed to the Infa Warmer i. Serves as an adapter when the humidifier bottle is fixed to the Infa Warmer i. The tube for connecting the unit to a Jackson-Rees resuscitation bag, etc. to have the internal pressure of the circuit indicated on the pressure meter.

Connection to the Gas Supply Sources and the Suction Pressure Supply Source

[3] Connection to the Gas Supply Sources and the Suction Pressure Supply Source CAUTION In order to ensure safety, read this Manual and the accompanying documents carefully and familiarize yourself with the operation and the maintenance inspection procedures described in them before operating the unit.

Make sure that no oils and fats or dirt sticks to the unit. Do not use flammables such as an aerosol (a spray can) when operating the unit. Never use fire where the unit is operated. Provide adequate ventilation where it is operated.

3-1.

PREPARATION

Do not use the unit if any leakage, loose or unstable connections, or any other trouble should be noticed.

Connection to the Gas Supply Sources and the Suction Pressure Supply Source

When connecting the unit to the piping system of your facilities or a gas cylinder, turn temporarily the knob for flowmeter on the unit fully clockwise and the suction lever to the OFF position, and then connect the hoses to the gas supply sources. Otherwise, the internal circuit would be damaged due to a sudden increase in the gas pressure.

Knob for flowmeter

Connecting to a gas cylinder To connect the unit to a gas cylinder, use the optional “Hose set for oxygen and air, 2m” and the optional “Pressure regulator OX-231 (for oxygen)” or the optional “Pressure regulator OX-232 (for air).”

3-2.

Piping Type

Be sure to connect each piping jack correctly to the corresponding piping connecting hose. The piping jacks for oxygen, air and suction have different shapes respectively. Incorrect connection will cause a serious accident. Be sure to connect various hoses and parts correctly according to the Operation Manual or the piping diagram sticker affixed near the hose connections on the unit. The description in this section relates to a piping type unit. If yours is a Venturi type unit (not the piping type unit), skip this section.

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Connection to the Gas Supply Sources and the Suction Pressure Supply Source

3-2-1. (1)

Connecting the Hoses Insert the function rail bracket for the suction canister and the one for the humidifier bottle supplied with the unit into the rails on the sides of the support column panel of the Infa Warmer i and turn each knob to fix them securely. Connect the outlet connecting hose (for suction) and the suction hose supplied with the unit to the suction canister. Connect the outlet connecting hose (for air/oxygen) and the oxygen supply hose supplied with the unit to the humidifier bottle.

Outlet connecting hose (for suction)

Suction canister

Suction hose Outlet connecting hose (for air/oxygen)

●● If you use a suction canister or a humidifier bottle which is not supplied with the unit, be sure to use the one securely attachable to the connecting port of the corresponding bracket.

(2)

(3)

Connect the piping connecting hose (for oxygen) and the piping connecting hose (for air) to the respective connecting ports on the unit. Connect each piping jack on the other end of the hose to the corresponding piping outlet of the medical gas supply source on the wall.

Humidifier bottle Oxygen supply hose

Piping connecting hose (for oxygen) Piping connecting hose (for air) Piping connecting hose (for suction)

Connect the piping connecting hose (for suction) to the connecting port on the unit and then connect the piping jack on the other end of the hose to the piping outlet of the suction pressure supply source on the wall.

◾◾ Connection diagram (the rear panel of the unit) Piping system of the facilities Medical gas supply source (oxygen)

Outlet connecting hose

Piping connecting hose (for oxygen) Piping connecting hose (for air)

Medical gas supply source (air) Piping connecting hose (for suction) Medical pressure supply source Notice: The connection diagram for gas cylinders is different from this one.

16

Suction hose

To the patient (suction tube)

Suction canister (a compatible non-Atom item)

Connection to the Gas Supply Sources and the Suction Pressure Supply Source

Piping jack are not included in the accessories. To connect to a piping outlet,obtain an appropriate piping jack and attach it to the piping connecting hose supplied with the unit by referring to the figure. ✽✽ If you have any questions concerning piping jacks, contact your authorized ATOM representative.

3-3.

Piping jack [for air]

Piping connecting hose:for air [yellow hose] Wire hose band Piping connecting hose:for oxygen [green hose]

Piping jack [for oxygen]

Piping jack [for suction]

Piping connecting hose:for suction [black hose]

Venturi Type

Be sure to connect various hoses and parts correctly according to the Operation Manual or the piping diagram sticker affixed near the hose connections on the unit.

PREPARATION

Be sure to connect each piping jack correctly to the corresponding piping connecting hose. The piping jacks for oxygen, air and suction have different shapes respectively. Incorrect connection will cause a serious accident.

The description in this section relates to a Venturi type unit. If yours is a piping type unit (not the Ventri type unit), skip this section.

3-3-1. (1)

Connecting the Hoses Insert the function rail bracket for the suction canister and the one for the humidifier bottle supplied with the unit into the rails on the sides of the support column panel of the Infa Warmer i and turn each knob to fix them securely. Connect the outlet connecting hose (for suction) and the suction hose supplied with the unit to the suction canister. Connect the outlet connecting hose (for air/oxygen) and the oxygen supply hose supplied with the unit to the humidifier bottle.

Outlet connecting hose (for suction)

Suction canister

Suction hose Outlet connecting hose (for air/oxygen)

●● If you use a suction canister or a humidifier bottle which is not supplied with the unit, be sure to use the one securely attachable to the connecting port of the corresponding bracket.

Humidifier bottle Oxygen supply hose

17

Connection to the Gas Supply Sources and the Suction Pressure Supply Source

(2)

(3)

Connect the piping connecting hose (for oxygen) and the piping connecting hose (for air) to the respective connecting ports on the unit. Connect each piping jack on the other end of the hose to the corresponding piping outlet of the medical gas supply source on the wall.

Piping connecting hose (for oxygen) Piping connecting hose (for air)

Screw the silencer supplied with the unit onto the exhaust.

Silencer

◾◾ Connection diagram (the rear panel of the unit) Piping system of the facilities

Outlet connecting hose

Piping connecting hose (for oxygen)

Suction hose

Medical gas supply source (oxygen)

To the patient (suction tube)

Medical gas supply source (air) Piping connecting hose (for air) Suction canister (a compatible non-Atom item) Silencer

Notice: The connection diagram for gas cylinders is different from this one.

Piping jack are not included in the accessories. To connect to a piping outlet,obtain an appropriate piping jack and attach it to the piping connecting hose supplied with the unit by referring to the figure. ✽✽ If you have any questions concerning piping jacks, contact your authorized ATOM representative.

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Piping jack [for air]

Piping jack [for oxygen]

Piping connecting hose:for air [yellow hose] Wire hose band Piping connecting hose:for oxygen [green hose]

Connection to the Gas Supply Sources and the Suction Pressure Supply Source

3-4.

Alarm Function for Gas Supply

◾◾ Silencing the alarm (the buzzer) The alarm (the buzzer) will be silenced automatically when the oxygen pressure and the air pressure return within the specified range (300~500kPa (3~5kgf/cm2)). However, under the following conditions, the alarm (the buzzer) will not sound even when the oxygen pressure or the air pressure deviates from the specified range. • Both the oxygen pressure and the air pressure supplied to the unit rise or fall, so that the pressure difference between them does not exceed 138kPa (1.4kgf/cm2).

PREPARATION

The Blender Unit P Type and Blender Unit E Type supplies an oxygen-air mixed gas of an accurate concentration by maintaining the pressures of the oxygen and the air at a constant level. If a gas pressure cannot be maintained at a specified level, an alarm (a buzzer) will sound to alert the operator to the abnormal condition. This alarm function will also activate when the pressure difference between the oxygen and the air supplied to the unit becomes 138kPa (1.4kgf/cm2) or more. Possible causes of this condition are as follows. • The piping of either the medical oxygen or the medical air is installed improperly or unreliably. • The gas supply pressure of the piping system of your facilities has become unstable for some reason and either the oxygen pressure or the air pressure has risen or fallen. • When gas cylinders are in use, either the oxygen cylinder or the air cylinder is almost empty. • The pressure difference between the oxygen and the air supplied to the unit has become 138kPa (1.4kgf/cm2) or more due to some trouble.

• The unit is connected to the piping system and the knob for flowmeter is turned fully to the shut-off side. ◾◾ Bleed function The oxygen/air supply function integrated in the unit ensures the accuracy of the preset oxygen-air mixed gas concentration over the whole selectable flow rate range. However, this function will not work effectively unless a constant amount of gas is flowing through the unit. Therefore, the oxygen and the air supplied to the unit are discharged continuously to the environment. This gas discharge is called “bleed.” The unit bleeds the gases at the flow rate of 2.5~3.5L/min.

●● Oxygen and air are consumed by the bleed function even when the knob for flowmeter is fully closed and “0L/min” is shown on the flowmeter. To prevent unnecessary consumption of these gases, remove the hoses from the piping connecting jacks or close the valves of the supply sources (when the gas cylinders are used).

3-5.

Daily Inspection

Before using the unit, check it carefully for any faults, contamination, missing parts or defective parts to make sure that it can be operated safely.

Be sure to inspect the unit at the start of each day. Operating the unit without inspecting it at the start of each day may let a defect pass unnoticed and cause a potentially unfavorable outcome.

19

How to Use Each Component Unit

[4] How to Use Each Component Unit The Blender Unit P Type and Blender Unit E Type contains the following two component units (①~②). This section deals with the operation of each component unit. Refer to the pages relating to the component unit concerned before using it.

①

②

① Suction unit (see p.21) The suction unit is used to remove secretions from a neonate’s airways before resuscitation. Either of the following two types of suctioning is selectable at the time of purchase. Whichever type is used, the suction pressure can be adjusted to a desired level by turning the knob and the suction pressure can be switched on/ off with the suction lever. • Piping type The piping type unit uses the negative pressure available by connecting its piping jack to the suction port of the piping outlet on the wall. • Venturi type The Venturi type unit uses the negative pressure created by connecting its piping jack to the oxygen port of the piping outlet on the wall, letting the oxygen flow and generating the Venturi effect. This type is usually used when no suction pressure supply source is provided for the piping system of the facilities. ② Oxygen-air mixed gas supply unit (see pages 27~31) The oxygen-air mixed gas supply unit supplies a mixed gas of oxygen and air to a nasal cannula, a head box, a Jackson-Rees circuit, etc. The oxygen concentration can be set to a desired level by using the oxygen blender, and the flow rate can be set to a desired level by using the flowmeter. This unit has two outlets, which can be used for different purposes. The built-in pressure meter can be used to measure the internal pressure of the circuit of the Jackson-Rees circuit, etc.

20