Ambu Oval Plus Silicone Resuscitator Instruction Manual

Ambu Oval Plus Silicone Resuscitator

Calculated delivered O₂ %, VT: Ventilation volume, f: Frequency

Important information

Read these safety instructions carefully before using the Ambu® Oval Plus Silicone Resuscitator.
The instructions for use may be updated without further notice. Copies of the current version are available upon request. Please be aware that these instructions do not explain or discuss clinical procedures? They describe only the basic operation and precautions related to the operation of the Ambu Oval Plus Silicone Resuscitator,
Before initial use of the Ambu Oval Plus Silicone Resuscitator, it is essential for operators to have received sufficient training in using the product and to be familiar with the intended use, warnings, cautions, and indications mentioned in these instructions.
There is no warranty on the Ambu Oval Plus Silicone Resuscitator.

Intended use
The Ambu Oval Plus Silicone Resuscitator is a reusable resuscitator intended for pulmonary resuscitation.

Indications for use
The Ambu Oval Plus Silicone Resuscitator is indicated in situations where a manual resuscitator is needed for assisted ventilation of patients.
The Ambu Oval Plus Silicone Resuscitator is indicated for ventilation and oxygenation of patients until a more definitive airway can be established or the patient has recovered.

Intended patient population
The range of application for each version is:

• Size Adult: Adults and children with a body weight of more than 30 kg (66 lbs)
• Size Pediatric: Infants and children with a body weight from 10 kg to 30 kg (22 ~ 66 lbs)
• Size Neonate: Neonates and infants with a body weight up to 10 kg (22 lbs)

Intended user
Medical professionals trained in airway management such as anesthesiologists, nurses, rescue personnel and emergency personnel.

Contra indications
None known

Clinical benefits
The basic airway management technique using a manual resuscitator allows for ventilation and oxygenation of patients until a more definitive airway can be established or the patient has recovered.

Warnings and cautions
Failure to observe these precautions may result in inefficient ventilation of the patient or damage to the equipment.

WARNINGS

1. Always reprocess the Ambu Oval Plus Silicone Resuscitator after each use in order to avoid the risk of infection.

2. Avoid the use of the resuscitator in toxic or hazardous environments to avoid the risk of tissue damage.

3. When using supplemental oxygen, do not allow smoking or use of device near open flame, oil, grease, other flammable chemicals or equipment and tools, which cause sparks, due to the risk of fire and/or explosion.

4. Always visually inspect the product and perform a functional test after unpacking, assembly and prior to use, as defects and foreign matters can lead to no or reduced ventilation of the patient.

5. Do not use the product if functionality test fails as this can lead to no or reduced ventilation.

6. Only to be used by intended users who are familiar with the content of this manual,b as incorrect use might harm the patient.

7. Professionals performing the procedure should assess the choice of resuscitator size and accessories (e.g. face mask, etc.) in accordance with the patient’s specific condition(s), as incorrect use may harm the patient.

8. Do not use the product if contaminated by external sources, as this can lead to infection.

9. Ensure that either the splash guard or an Ambu PEEP Valve is attached to the expiratory port. An open expiratory port can be accidentally blocked and result in excessive air volume in the lungs, which could lead to tissue trauma.

10. The Manometer cap must always be put on the Manometer port when pressure is not being monitored to avoid leakage, which may lead to reduced O₂ delivery to the patient.

11. Always reprocess the Ambu Oval Plus Silicone Resuscitator if visible residues or moisture are left inside the device, in order to avoid the risk of infection and malfunction.

12. Do not override the pressure-limiting valve unless a medical assessment indicates the necessity. High ventilation pressures may cause barotrauma.

13. Always ensure that the oxygen reservoir tube is not blocked, as blocking the tube can prevent the compressible bag from reinflating, which can result in no possible ventilation.

14. Adding accessories may increase inspiratory and/or expiratory resistance.
    Do not attach accessories if increased breathing resistance would be detrimental to the patient.

15. Do not reuse the resuscitator on another patient without reprocessing it due to the risk of cross infection.

16. Do not use the product with an attached face mask when ventilating infants with congenital diaphragmatic hernia due to the risk of insufflation. Switch to an alternative to using a face mask for directing air to the patient, if available.

17. Be aware of complete/partial upper airway obstruction signs when using the resuscitator attached to a face mask, as this will lead to no or limited oxygen delivery. Always switch to an alternative to using a face mask for directing air to the patient, if available.

18. Do not use the Ambu Oval Plus Silicone Resuscitator after reprocessing a maximum of 30 times (15 times for the oxygen reservoir bag) in order to avoid the risk of infection or malfunction of the device.

19. Do not use the Ambu Oval Plus Silicone Resuscitator when delivery of free-flow oxygen is needed due to possible insufficient administration of oxygen, which can lead to hypoxia.

20. When using the resuscitator with an attached face mask, ensure correct positioning and sealing of the face mask, as improper sealing can lead to spreading of airborne infectious diseases to the user.

CAUTIONS

1. Do not use substances containing phenols to clean the product. Phenols will cause premature wearing and degradation of the materials resulting in reduced product life span.
2. After cleaning, promptly remove all residues of detergent from the resuscitator, as residues may cause premature wear or reduce the product lifetime.
3. Never store the resuscitator in a deformed state other than as folded when delivered by the manufacturer, otherwise permanent distortion of the bag could occur, which may reduce the ventilation efficiency. The folding zone is clearly visible on the bag (only Adult and Pediatric versions may be folded).
4. Always watch the movement of the chest and listen for the expiratory flow from the patient valve in order to check the ventilation. Switch immediately to mouthto- mouth ventilation if ventilation with the resuscitator cannot be obtained.
5. Do not attempt to disconnect the patient connector from the patient valve as these are permanently attached, and disassembly might lead to device damage and malfunction.
6. Do not attempt to disassemble the resuscitator further than described in this instruction due to the risk of device damage and malfunction.
7. If applicable, please see accessory packaging for more specific information about the individual accessory as incorrect handling may lead to malfunction of the entire product.
8. The use of third-party products and oxygen delivery devices (e.g. filters and demand valves) with the Ambu Oval Plus Silicone Resuscitator may influence product performance. Please consult the manufacturer of the third-party device to verify compatibility with the Ambu Oval Plus Silicone Resuscitator and obtain information on the possible performance changes.
9. Always keep components from the same device together during reprocessing to avoid reassembly of components with different durability leading to the risk of product failure.

Potential adverse events
Potential adverse events related to resuscitation (not exhaustive): barotrauma, volutrauma, hypoxia, hypercarbia and aspiration pneumonia.

General notes
If, during the use of this device or as a result of its use, a serious incident has occurred, please report it to the manufacturer and to your national authority.

Device description

The Ambu Oval Plus Silicone Resuscitator can be connected to the Ambu® Disposable Pressure Manometer, the Ambu PEEP valves and the Ambu face masks, as well as other breathing accessories complying with EN ISO 5356-1 and EN ISO 13544-2.

Explanation of symbols used

A full list of symbol explanations can be found on ambu.com/symbol- explanation.

Product use

4.1. Principle of operation
The illustration on page 2 1 shows the ventilation gas flow into the bag and to and from the patient during manual operation of the resuscitator. 1a Oval Plus Silicone Resuscitator Adult/Pediatric, 1b Oval Plus Silicone Resuscitator Neonate with oxygen reservoir bag,
1c Oval Plus Silicone Resuscitator Neonate with oxygen reservoir tube.
The gas flow is similar when the patient is breathing spontaneously through the device.
The oxygen reservoir bag is fitted with two valves, one allowing ambient air to be drawn in when the reservoir is empty 1.2 and one spilling out surplus oxygen when the reservoir bag is full. 1.1

1.1 Excess oxygen release, 1.2 Air inlet, 1.3 Oxygen inlet, 1.4 Patient connector,
1.5 Expiration, 1.6 Manometer port, 1.7 Pressure-limiting valve.

4.2. Inspection and preparation
The resuscitator must be unpacked and prepared (including performing a functionality test) for immediate use in emergency situations.

Preparation

• Prepare the resuscitator according to the assembly guide and place all items in the carrying bag supplied with the resuscitator.
• If a face mask is supplied with the resuscitator, ensure to remove the protective pouch (if any) before use.
• Before use on the patient make a brief functionality test as described in section 4.2.2.

Test of function Resuscitator
Close the pressure-limiting valve with the override cap 3.2 and close the patient connector with the thumb 7.1. Briskly squeeze the bag. The resuscitator shall be resisting the squeeze.

Open the pressure-limiting valve by opening the override cap 3.1 and repeating the procedure. The pressure-limiting valve should now be activated, and it should be possible to hear the exhaust air flow from the valve.

Remove the finger from the patient connector and squeeze and release the resuscitator a few times to ensure that air is moving through the valve system and out of the patient valve 7.2.

NOTE: A slight sound may appear from the moving valve disks during operation. This does not compromise the functionality of the resuscitator.

Oxygen reservoir bag
Supply a gas flow of 10 l/min at the oxygen inlet connector. Facilitate the unfolding of the oxygen reservoir bag. Check that the oxygen reservoir bag fills. If not, check the integrity of the two valve shutters 6.3 or for a tear in the oxygen reservoir bag. Subsequently, adjust the supplied gas flow according to medical indication.

Oxygen reservoir tube
Supply a gas flow of 10 l/min at the oxygen inlet connector. Check that the oxygen flows out at the end of the oxygen reservoir tube. If not, check for a blocked oxygen reservoir tube. Subsequently, adjust the supplied gas flow according to the medical indication.

4.3. Operating the resuscitator

• Use recommended techniques to clear the patient’s mouth and airway and to position the patient correctly, to secure an open airway.
• Hold the face mask firmly against the patient’s face. 2
• Slide your hand (Oval Plus Silicone Resuscitator Adult and Pediatric) under the handle (Oval Plus Silicone Resuscitator Neonate does not have a support handle). Ventilation of the patient: During insufflation observe for chest rise. Release the hand holding the compressible bag abruptly and listen for the expiratory flow from the patient valve and as well for the visual lowering of the chest.
• If continued resistance to insufflation is encountered, check the airway for obstruction and re-position the patient, to ensure an open airway.
• If the patient vomits during ventilation; immediately remove the resuscitator to clear the patient’s airway and expel the vomit from the resuscitator by shaking and compressing it forcefully and fast several times before resuming ventilation. In the case of excessive amount of vomitus obstructing the air flow, the patient valve may be disassembled and cleaned. For details on dis- and reassembly of the patient valve refer to illustrations 5.5 and 6.1.
• If connecting external devices to the resuscitator, make sure to test for functionality and consult the instructions for use accompanying these external devices.

Manometer port
The Ambu Disposable Pressure Manometer or a third-party pressure gauge can be attached to the manometer port, situated on the top of the patient valve. Remove the cap and attach the manometer/pressure gauge 8 .

Pressure-limiting valve
The pressure-limiting valve is set to open at 40 cmH₂O (4.0 kPa).
If medical and professional assessment indicates that a pressure above 40 cmH₂O is required, the pressure-limiting valve can be overridden by pressing the override cap onto the valve 3.2.

Alternatively, the pressure-limiting valve can be overridden by placing the index finger on the blue button while squeezing the bag.

Oxygen administration
Administer oxygen according to the medical indication.
Figure 4 shows calculated delivered oxygen percentages which can be obtained with different ventilation volumes and frequencies at different gas flow rates referring to Oval
Plus Silicone Resuscitator Adult 4.1, Oval Plus Silicone Resuscitator Pediatric 4.2 and Oval
Plus Silicone Resuscitator Neonate 4.3, respectively.

4.4. Reprocessing: cleaning, disinfection, sterilization
Follow these reprocessing instructions after each use to reduce the risk of cross-contamination.

Disassembly
Before reprocessing, manually disassemble the resuscitator into individual components to the level shown in 5.1 5.2 5.3 to make surfaces accessible to cleaning.
Follow the disassembly method shown in 5.4 5.5 and 5.6.
Keep components from the same device together during reprocessing and keep track of the number of times each resuscitator has been processed to avoid reassembly of components with different durability.

Recommended reprocessing procedures
For a complete reprocessing of the Ambu Oval Plus Silicone Resuscitator, use one of the procedures listed in Table 1.

•      Oval Plus Silicone Resuscitator Adult

•      Oval Plus Silicone Resuscitator Pediatric

•      Oval Plus Silicone Resuscitator Neonate (except oxygen reservoir tube)

| __

•      Manual cleaning followed by chemical disinfection

•      Manual cleaning followed by sterilization

•      Automated cleaning, including a thermal disinfection stage, followed by sterilization

•      Automated cleaning, including a thermal disinfection stage, followed by chemical disinfection

Oxygen reservoir tube for Oval Plus Silicone Resuscitator Neonate| • Manual cleaning followed by chemical disinfection

Table 1: Recommended reprocessing procedures.

Product testing has shown that the Ambu Oval Plus Silicone Resuscitator is fully functional after 30 full reprocessing cycles, as listed in Table 1, with the exception of the oxygen reservoir bag, which can be sterilized a maximum 15 times or chemically disinfected a maximum 30 times.

It is the user’s responsibility to qualify any deviations from the recommended cycles and methods of processing, and to monitor that the recommended number of reprocessing cycles is not exceeded.
Always perform a test of functionality prior to each use (see section 4.2.2.)

Procedures for reprocessing
MANUAL CLEANING

1. Rinse the components under running cold utility (tap) water to remove gross soil.

2. Prepare a detergent bath using a cleaning detergent solution, e.g. Neodisher®
   MediClean Forte or equivalent, for the removal of residues of dried and denatured blood and proteins, using the detergent manufacturer’s recommended concentration.

3. Fully immerse the components to keep them submerged in the solution according to the detergent instruction label. During the soak time thoroughly clean the components with a soft brush and flush the bags and lumens until all visible soil is removed.

4. Thoroughly rinse the articles by fully immersing them in tap water, agitating and allowing them to set for a minimum of 3 minutes.

5. Repeat the previous step two more times for a total of three rinses using a fresh batch of tap water each time.

6. Dry the components with a clean lint-free cloth and compressed air.

AUTOMATED CLEANING AND THERMAL DISINFECTION (NOT APPLICABLE FOR OXYGEN RESERVOIR TUBE)

1. Rinse the components under running cold utility (tap) water to remove gross soil.
2. Place the components onto a manifold rack or in a wire basket contained inside the washer.
3. Select the cycle as listed in table 2:

Stage| Recirculation time (minutes)| Temperature| Detergent type and concentration
---|---|---|---
Pre-wash| 02:00| Cold tap water| N/A

Wash

|

01:00

|

43 °C (110 °F)

tap water

| Neodisher® MediClean Forte or an equivalent detergent using manufacturer’s recommended concentration
Rinse| 05:00| 43 °C (110 °F)

tap water

| N/A
Thermal disinfection| 05:00| 91 °C (196 °F)| N/A
Dry Time| 07:00| 90 °C (192 °F)| N/A

Table 2: Automated cleaning procedure for Oval Plus Silicone Resuscitator (not applicable for oxygen reservoir tube).

CHEMICAL DISINFECTION

1. Equilibrate the bath of Cidex OPA, or an equivalent OPA (ortho-phthalaldehyde), disinfectant at the temperature specified in the OPA disinfectant manufacturer’s instructions.
2. Ensure the minimum effective concentration (MEC) of the OPA disinfectant using the OPA test strips specified in the OPA disinfectant manufacturer’s instructions.
3. Fully immerse the device in the OPA and ensure that all air bubbles are removed from the device surface by agitating the device.
4. Allow the device to soak for the time specified by the OPA disinfectant manufacturer’s instructions.
5. Thoroughly rinse the device by fully immersing it in purified water, agitating and allowing it to set for a minimum of 1 minute. During the rinse, flush the bag with the purified water.
6. Repeat step 5 two more times for a total of 3 rinses using a fresh batch of purified water each time.
7. Dry the device using a sterile lint-free cloth.

STERILIZATION
Sterilize the product using a gravity steam autoclave running a full cycle at 134 – 135 °C (274 – 275 °F) with an exposure time of 10 minutes and a dry time of 60 minutes. Leave the components to dry and/or cool completely before reassembling the resuscitator.

Inspection of components
After reprocessing, carefully inspect all components for damage and residuals or excessive wear and replace if necessary. Some methods may cause discoloration of rubber components without impact on their lifetime. In case of material deterioration, e.g., cracking, the components should be discarded and replaced with a new component.

In case of sterilization, the oxygen reservoir bag can look slightly wrinkled. This has no impact on its lifetime or function.

Reassembly
Manually reassemble the components of the resuscitator as shown in 6 .

1. When inserting the valve housing of the inlet valve, make sure that the bag opening seats smoothly against the flange.
2. When inserting the valve discs, make sure the butt of the stem is pushed and pulled through the hole in the middle of the valve seating, as shown in figure 6.1 6.2 and 6.3.
3. When mounting the splash guard: Note that the opening of the splash guard should face downwards 6.1.
4. When mounting the oxygen reservoir bag on to the Ambu Oval Plus Silicone
   Resuscitator Neonate, attach the adaptor to the resuscitator inlet valve by mounting the adaptor’s corrugated connector onto the inlet connector, and additionally, by mounting the adaptor’s cap to cover the oxygen inlet connector. Subsequently, connect the oxygen reservoir bag to the adaptor’s corrugated connector.

Perform a functionality test after reassembly and before it is prepared for immediate use in emergency situations (see section 4.2.2.).

Service
The resuscitator requires no scheduled maintenance other than regular reprocessing, inspection and testing.

Disposal
Used products must be disposed of according to local procedures.

Technical product specifications

5.1. Standards applied
The Ambu Oval Plus Silicone Resuscitator is in conformity with the product specific standard EN ISO 10651-4.

5.2. Specifications

100 ml (tube)

| 1500 ml (bag)| 1500 ml (bag)
 | Neonate| Pediatric| Adult
---|---|---|---
Inspiratory resistance*, ***| with oxygen reservoir tube: 0.6 cm H₂O

at 5 l/min 4.6 cmH₂O at 50 l/min

with oxygen reservoir bag: 0.9 cm H₂O

at 5 l/min 5.0 cm H₂O at 50 l/min

|

with oxygen reservoir bag: 0.7 cmH₂O

at 5 l/min 5.0 cmH₂O at 50 l/min

|

with oxygen reservoir bag: 3.7 cmH₂O

at 50 l/min

Expiratory resistance*, ***| 1.6 cm H₂O at 5 l/min| 4.5 cmH₂O at 50 l/min| 2.3 cmH₂O at 50 l/min
PEEP generated by resuscitator in normal use with added supply gas flow*, ***| with oxygen reservoir tube:

< 2 cm H₂O at 5, 10, and 15 l/min with oxygen reservoir bag: 2.5 cm H₂O

at 5 l/min 2.8 cm H₂O at 10 l/min 2,8 cm H₂O at 15 l/min

(VT 20 ml, f 60)

| with oxygen reservoir bag:

< 2 cm H₂O at 5, 10,

and 15 l/min

(VT 150 ml, f 25)

| with oxygen reservoir bag:

< 2 cm H₂O at 5, 10, and 15 l/min

(VT 450 ml, f 20)

ISO 5356-1)
Expiration connector

(for PEEP valve attachment)

| 30 mm male (EN ISO 5356-1)
Manometer port connector| Ø 4,2 +/- 0.1 mm
Bag refill valve connector| –| Inside 32 mm female| Inside 32 mm female
Forward and backward leakage| Not measurable
O₂ inlet connector| According to EN ISO 13544-2
Operation temperature limits| -18 °C to +50 °C (-0.4 °F to +122 °F)
Storage temperature limits*| -40 °C to +60 °C (-40 °F to +140 °F)
Recommended long term storage in closed packaging at room temperature, away from sunlight

NOTES:

• 10 cmH₂O = 1.0 kPa
• VT : Ventilation volume
• f: Frequency (breath per minute)
• Tested according to EN ISO 10651-4
• Higher airway pressure can be obtained by overriding the pressure-limiting valve
• At general test conditions according to EN ISO 10651-4:2009
• Values are approximate
• Maximum values

5.3. MRI Safety Information
The Ambu Oval Plus Silicone Resuscitator is MR Conditional, and therefore may be safely used in the MR environment (not inside the MR bore) under the following conditions.

• Static magnetic field of 7 Tesla and less, with
• Maximum spatial field gradient of – 10,000 G/cm (100 T/m)
• Maximum force product of – 450,000,000 G²/cm (450 T²/m)

Use inside the MR bore may influence MR image quality.
RF-induced heating and MR image artifacts have not been tested. Any metallic parts are fully encapsulated and do not have any contact with the human body.

References

• Ambu - Single-use devices that save lives

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