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A breathing circuit is the tubing assembly that connects a ventilator, BiPAP unit or other breathing device to the patient interface. This Respiratory Supplies subcategory includes ventilator circuits, heated and non-heated circuits, heat and moisture exchangers (HMEs), exhalation valves, water traps, adapters and related breathing accessories from Teleflex and Fisher & Paykel.
Circuit type is the most important match, and it depends on the ventilator. Single-limb circuits have one tube with an exhalation valve or leak port near the patient, while dual-limb circuits have separate inspiratory and expiratory tubes. Circuits are also sold as adult or pediatric, heated-wire or standard, and with or without a built-in exhalation valve. The ventilator manufacturer lists which circuit types are compatible, and the circuit and settings are specified by your clinician.
Length is the second attribute. Standard lengths suit most setups, and longer circuits give more room between the device and the bed or chair. HMEs are compared by connector size, dead space and whether they include a filter.
Circuits and HMEs are generally single-patient-use items with replacement intervals set by the manufacturer. When reordering, match the REF number on the current package so the new circuit fits your device.
Frequently asked questions
How do I choose the right breathing circuit type?
Start with the ventilator or device model. Its manufacturer lists compatible circuits, and your clinician specifies whether a single-limb or dual-limb, heated or standard, adult or pediatric circuit is used. Then choose a length that fits your setup. Matching the REF number on your current circuit is the simplest check.
Are ventilator circuits covered by insurance?
Ventilator circuits and HMEs may have HCPCS codes, which are shown on the product page for reference. Coverage often depends on whether the ventilator is rented, which supplier provides it, and your payer and plan. ArmadaMeds is a retailer, does not bill insurance and cannot promise coverage, so check with your plan or equipment supplier.
How do I reorder the same circuit or HME?
Search the REF number printed on your circuit bag or HME package. Confirm the circuit type, length and count on the listing, since each configuration is a separate item. Circuits and HMEs are sold individually, by the box and by the case.

















