Assura post-op. Assura post-op pouch. Assura post-op combines the unique Assura spiral adhesive with the essentials in post-operative care: easy access to the stoma without removing the appliance, and effective drainage. Assura post-op combines the unique Assura spiral adhesive with the essentials in post-operative care: easy access to the stoma without removing the appliance, and effective drainage. Removable window - for easy inspection of the stoma. Large spout-type drainage outlet - for easy drainage and connection to night bags. Spiral adhesive, for security and skin-friendliness. The Assura spiral adhesive is a combination of materials designed for security and protection in a spiral structure, for: Secure adherence to your skin. Absorption of moisture from your skin - providing skin-friendliness and protection from irritation. Assura post-op is available in a variety of options to meet varying post-operative needs, including a 2-3/4" and 4" cutting surface option, sterile and non-sterile, and even a pouch without a window.