Urine collection bag
A urine collection bag (or urinary drainage bag) is a sterile medical device designed to collect fluid output from patients using an indwelling Foley or suprapubic catheter. It is widely used in hospital wards, intensive care units, and home care setups for patients with urinary retention or limited mobility.
Key Technical Specifications
- Nominal Capacity: Standard hospital drainage bags hold 2,000 mL (2 Litres), while smaller, ambulatory leg bags hold 500 mL to 750 mL.
- Graduation Markings: Clear, high-contrast increment scales (typically every 100 mL up to 2,000 mL) to allow nurses or caregivers to track accurate urine output.
- Material: Manufactured from medical-grade, non-toxic, heavy-duty polyvinyl chloride (PVC) to prevent tearing and contain odors.
- Sterilization: Individually packed and sterilized using Ethylene Oxide (ETO) gas to maintain a sterile pathway and prevent ascending urinary tract infections (UTIs).
Advanced Clinical Components
- Non-Return Valve (NRV): A built-in, one-way flutter or swing valve that prevents the reverse flow of urine back into the bladder, which is critical for minimizing infection risks.
- Kink-Resistant Drainage Tubing: A long, flexible PVC inlet tube (typically 90 cm to 100 cm) equipped with a universal tapered connector to fit securely onto any catheter size.
- Bottom Outlet Valve: Used to drain the bag cleanly without splashing. Common variants include:
- T-Tap Valve: A sliding T-shaped valve for quick, one-handed drainage.
- Push-Pull Valve: A vertical pull-to-open mechanism.
- Screw-Type Valve: A twisting valve often used in traditional designs.
- Hanging Mechanism: Integrated reinforced plastic hangers and a flexible string stringer to secure the bag flat onto a hospital bed rail or frame below bladder level.
Primary Variations
Standard Drainage Bag (2000 mL): Used for bedridden or immobilized patients. It hangs statically from the bedframe.
Urometer Bag (2000 mL Bag + 250 mL Measuring Chamber): a smaller, rigid plastic front chamber for hourly, highly precise fluid measurement in critical care (ICU) setups.
Ambulatory Leg Bag (500 mL - 750 mL): Compact bags secured directly to the patient's thigh or calf with elastic straps, designed to be hidden under clothing for mobile patients.

