AAMI Isolation Gown Levels: A Procurement Guide for Canadian Healthcare

July 20, 2026

Each level corresponds to specific test methods (AATCC 42 for impact penetration and AATCC 127 for hydrostatic pressure), which simulate different clinical scenarios.

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AAMI Gown Level Comparison

Level	Barrier Protection	Fluid Resistance	Key Test
Level 1	Minimal barrier	Low fluid resistance	AATCC 42: ≤4.5 g water penetration
Level 2	Low barrier	Moderate fluid resistance	AATCC 42: ≤1.0 g; AATCC 127: ≥20 cm H₂O
Level 3	Moderate barrier	High fluid resistance	AATCC 42: ≤1.0 g; AATCC 127: ≥50 cm H₂O
Level 4	High barrier (surgical)	Maximum fluid/viral resistance	AATCC 42: ≤1.0 g; AATCC 127: ≥150 cm H₂O + viral penetration resistance

Level-by-Level Breakdown with Canadian Use Cases

AAMI Level 1: Minimal Barrier

Level 1 gowns offer the lowest level of fluid barrier protection. They are tested only for water impact penetration (AATCC 42) and are not required to pass a hydrostatic pressure test. These gowns are suitable for minimal-risk situations where no fluid exposure is anticipated.

Canadian use cases:

Standard patient visits and examinations in clinics
Hospital visitor gowns
Administrative and hospitality settings within healthcare
Long-term care settings for low-risk contact

AAMI Level 2: Low Barrier

Level 2 gowns provide a low barrier against fluid penetration. They must pass both the impact penetration test (≤1.0 g) and the hydrostatic pressure test (≥20 cm H₂O). These are the most commonly used isolation gowns in Canadian healthcare.

Canadian use cases:

Blood draws and IV insertion
Emergency department triage
Suturing in minor procedures
Dental clinic use for cleanings and basic procedures
Laboratory work with minimal splash risk

AAMI Level 3: Moderate Barrier

Level 3 gowns offer a high level of fluid resistance, passing the impact test (≤1.0 g) and a significantly higher hydrostatic pressure threshold (≥50 cm H₂O). They are used when there is a moderate risk of fluid splash or spray.

Canadian use cases:

Trauma response in emergency departments
Oral surgery and periodontal procedures
Wound irrigation and debridement
Intubation or extubation of patients
Procedures involving irrigation fluids or power tools

AAMI Level 4: High Barrier (Surgical)

Level 4 is the highest protection level under AAMI PB70. These gowns must pass the same impact pressure tests as Levels 2 and 3, plus a viral penetration resistance test (ASTM F1671, using a bacteriophage surrogate for bloodborne viruses). Level 4 gowns are sterile and intended for invasive surgical procedures.

Canadian use cases:

Major surgical procedures in hospital operating rooms
Any procedure with high risk of fluid spray or prolonged fluid exposure
Procedures on patients with known bloodborne infections
Cesarean sections and other high-fluid obstetric procedures
Orthopaedic surgeries using power tools with irrigation

AAMI Isolation Gown Levels: A Procurement Guide for Canadian

Health Canada Compliance for Isolation Gowns

In Canada, isolation gowns are classified as Class I or Class II medical devices depending on their intended use:

Class I: Non-sterile isolation gowns (typically Levels 1–3) used for standard precautions
Class II: Sterile surgical gowns (typically Level 4) used in invasive procedures

All gowns must be sold by a supplier with a valid Medical Device Establishment Licence (MDEL). Class II gowns require a Medical Device Licence (MDL) in addition to the supplier's MDEL.

When sourcing AAMI isolation gowns in Canada, always request:

Current MDEL or MDL documentation
AAMI PB70 test reports from an accredited laboratory
Certification that the gown level is as labeled
Evidence of the gown's intended use and any sterilization claims

Procurement Strategy for Canadian Healthcare Facilities

Most Canadian facilities should stock at least two levels of gowns:

Level 1 or 2 for daily patient care, examinations, and low-risk procedures
Level 3 or 4 for high-risk, high-fluid procedures and surgical settings

Consolidating gown procurement with your glove, mask, and underpad orders can yield significant volume discounts. CliniEco Medical works with Canadian healthcare facilities of all sizes to source compliant, cost-effective AAMI isolation gowns across Canada, from Level 1 through Level 4.

Need this for your facility? CliniEco Medical supplies CliniEco Medical Isolation Gown — SMMS 40gsm Level 2 Protection, 50-Pack to Canadian clinics, laboratories and long-term care homes. Open a wholesale account for institutional pricing.