ResMed Astral Single Limb Circuit – Smooth Bore 15 mm

Description

ResMed Astral Single Limb Circuit — Smooth Bore 15 mm

Quick answer: This is a genuine ResMed single-limb breathing circuit (smooth bore, 15 mm) for the Astral ventilator (part 21312). A breathing circuit is the tubing that carries air between the ventilator and the patient. This is the single-limb configuration in the 15 mm (paediatric) bore, with a smooth interior for low resistance. This version comes without a water trap — if your setup uses humidification, the water-trap version (21314) is the one to choose. Set up and use as directed by the patient’s clinical team.

About this circuit

Breathing (ventilator) circuits connect the Astral ventilator to the patient interface. The Astral supports single- and double-limb circuits using interchangeable circuit adapters. In a single-limb circuit, one tube carries air to the patient, with exhalation managed by a valve or vent in the setup. This circuit has a smooth bore (smooth inner wall) for low resistance to airflow and is the 15 mm diameter, typically used for paediatric patients. Because the Astral requires a “learn circuit” procedure when the circuit type changes, follow the clinical team’s setup instructions.

Key features

• Genuine ResMed single-limb circuit (21312) — for the Astral ventilator.
• Smooth bore — smooth interior wall for low resistance.
• 15 mm diameter — paediatric size.
• Without water trap — for setups that don’t require one (see 21314 if you need one).
• Connects via circuit adapter — fits the Astral with the appropriate adapter.
• Clinician-directed use — set up per the Astral clinical guide.

Specifications

Is it right for my setup?

Breathing circuits come in different diameters (10, 15, or 22 mm) and configurations (single vs double limb), smooth or corrugated bore, with or without water traps. The right circuit depends on the patient and the prescribed ventilation setup — your clinical team will advise which circuit to use and how to assemble it. If humidification is part of the therapy, a circuit with a water trap (21314) is generally the appropriate choice. The Astral requires a “learn circuit” step whenever the circuit type is changed. If you’re unsure which version matches your prescription, confirm with your provider before ordering.

Frequently asked questions

What’s the difference between 21312 and 21314?
Both are single-limb, smooth-bore, 15 mm circuits for the Astral. 21312 has no water trap; 21314 includes one — the water-trap version is used when humidification is part of the setup.

What is a single-limb circuit?
It uses one tube to carry air to the patient, with exhalation managed by a valve or vent in the setup — as opposed to a double-limb circuit with a separate expiratory limb.

What does “smooth bore” mean?
The inner wall of the tubing is smooth (rather than corrugated), which offers low resistance to airflow.

Who is the 15 mm size for?
The 15 mm bore is typically used for paediatric patients. Your clinical team confirms the correct circuit.

Which ventilator does it fit?
The ResMed Astral, using the appropriate circuit adapter.

Do I need a prescription?
Yes — ventilator circuits are used under clinical direction. Confirm your prescribed setup with your provider.

Can I get it delivered in Brooklyn or shipped nationwide?
Yes — Stark Medical Supplies offers local pickup and delivery in Brooklyn and across NYC, plus USPS shipping throughout the continental U.S.

This is a prescription medical device accessory for use under clinical direction. Follow the Astral clinical/user guide and your healthcare team’s instructions, including the required “learn circuit” procedure.