Apex 9C668001
Apex Medical Domus 3-5" Low Air Loss Alternating Overlay Pressure Mattress User Manual
Model: 9C668001
Introduction
The Apex Medical Domus 3-5" Low Air Loss Alternating Overlay Pressure Mattress is designed to provide pressure redistribution and comfort for patients, particularly those at medium risk of pressure injury. This system features two therapy modes: alternating mode for dynamic pressure relief and static mode for a stable surface. Its ventilated low air loss function helps manage moisture and heat, contributing to patient comfort and reducing the risk of skin breakdown.
Safety Information
Always read and understand all instructions before operating the device. Failure to do so may result in injury or damage to the product.
- Ensure the mattress is properly secured to the bed frame to prevent shifting.
- Do not use near open flames or sources of ignition.
- Keep the pump unit dry and away from liquids.
- Regularly inspect the mattress and tubing for any signs of wear or damage.
- In case of emergency, utilize the CPR strap for rapid mattress deflation.
- Do not exceed the maximum weight capacity of 440 pounds.
- Consult a healthcare professional for appropriate pressure settings based on patient condition.
Components
The Apex Medical Domus 3-5" system includes the following main components:
- Pressure Mattress Overlay: Composed of 17 individual 5-inch air cells, with ventilated cells (3-11) for low air loss. Features a durable Nylon/PU cover with a zipper for easy removal.
- Variable Pressure Pump System: A compact and quiet pump unit that inflates and deflates the air cells, offering variable pressure settings and a weight indicator.
- Air Hoses: Connect the pump to the mattress.
- CPR Strap: For rapid deflation in emergencies.

Figure 1: Overview of the Apex Medical Domus 3-5" Pressure Mattress and Pump System.
Setup
- Prepare the Bed: Place the mattress overlay directly on top of the existing mattress on a hospital or home bed. Ensure it is centered and lies flat.
- Position the Pump: Place the pump unit on a stable surface at the foot end of the bed, or hang it securely on the bed frame using the integrated hangers. Ensure it is easily accessible and not obstructed.
- Connect Air Hoses: Connect the air hoses from the mattress to the corresponding ports on the pump unit. Ensure a secure and airtight connection.
- Plug In: Plug the pump's power cord into a grounded electrical outlet.
- Initial Inflation: Turn on the pump. The mattress will begin to inflate. Allow approximately 20-30 minutes for the mattress to fully inflate before placing a patient on it.

Figure 2: Mattress and pump dimensions for proper setup. Mattress: 78.7" (L) x 35.4" (W) x 5" (H). Pump: 11.4" (L) x 7.3" (H) x 5" (W).
Operating Instructions
Power On/Off
Locate the power switch on the pump unit. Flip the switch to the "ON" position to start the pump and inflate the mattress. Flip to "OFF" to turn off the unit.
Therapy Modes
The Domus 3 offers two primary therapy modes:
- Alternating Mode: This mode continuously inflates and deflates alternating air cells to redistribute pressure over time, preventing prolonged pressure on any single area. This is ideal for pressure injury prevention.
- Static Mode: In this mode, all air cells remain inflated to a constant pressure, providing a stable and firm surface. This mode is suitable for general use or when a stable surface is preferred.

Figure 3: Illustration of the alternating pressure redistribution system, showing one cycle of inflation and deflation.
Pressure Adjustment
The pump unit features a variable pressure setting with a weight indicator. Adjust the pressure knob to select the appropriate firmness based on the patient's weight and comfort preference. Refer to the pump's display or markings for recommended settings.
Low Air Loss Feature
Air cells 3 through 11 are designed with a low air loss feature. This allows a small amount of air to escape through microscopic pores, wicking away moisture and heat from the patient's skin. This helps keep the patient comfortable and reduces the risk of skin maceration and shear forces.

Figure 4: Visual representation of the low air loss feature, illustrating how air escapes to prevent skin maceration.
Maintenance
Cleaning the Mattress Cover
The Nylon/PU cover is water-resistant and vapor permeable. It can be removed for cleaning. Unzip the cover completely and follow these instructions:
- Machine Wash: The cover can be machine washed. Use a mild detergent and cold water on a gentle cycle.
- Drying: Air dry or tumble dry on low heat. Do not iron or bleach.
- Spot Cleaning: For minor spills, wipe with a damp cloth and mild disinfectant.

Figure 5: Details of the zipper-all-around cover and the water-resistant Nylon/PU material.
Cleaning the Pump Unit
Wipe the exterior of the pump unit with a damp cloth and a mild, non-abrasive cleaner. Do not immerse the pump in water or spray liquids directly onto it.
Air Cell Replacement
Each of the 17 air cells is individually removable and replaceable. If an air cell is damaged, disconnect the mattress from the pump, deflate the mattress, and carefully remove the damaged cell. Insert a new cell and re-inflate the mattress.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mattress not inflating or losing air |
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| Pump is noisy |
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| Mattress too firm/soft |
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Specifications
- Model: 9C668001
- Mattress Dimensions: 78.7" (L) x 35.4" (W) x 5" (H)
- Air Cell Height: 5 inches
- Number of Air Cells: 17
- Mattress Material: Nylon/PU (Cover)
- Special Feature: Water Resistant, Low Air Loss (cells 3-11)
- Weight Capacity: 440 pounds (200 kg)
- Pump Noise Level: ≤ 30dB(A)
- Product Weight: 8.3 kg (approx. 18.3 lbs)
- Manufacturer: Apex Medical
- Date First Available: 11 September 2020

Figure 6: The Domus mattress is available in 5-inch and 8-inch height options. This manual pertains to the 5-inch model.
Warranty and Support
Warranty: The Apex Medical Domus 3-5" Low Air Loss Alternating Overlay Pressure Mattress and its pump system come with a 1-year guarantee from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.
Customer Support: For technical assistance, troubleshooting not covered in this manual, or warranty claims, please contact Apex Medical customer support. Refer to the product packaging or the Apex Medical official website for contact details.
When contacting support, please have your product model number (9C668001) and date of purchase readily available.
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