Postoperative drainage management presents significant challenges in thoracic and abdominal surgeries, with risks of infection, backflow, and inefficient fluid removal. The Mera Aqua Seal® drainage bag, developed by Izumi Medical Industry Co., Ltd., addresses these concerns through its patented water-seal design and multi-layered safety mechanisms.

The Mera Aqua Seal® is a single-use medical device designed for post-surgical drainage of blood, gases, and exudates from thoracic or abdominal cavities. Its water-seal technology prevents air reflux while maintaining consistent negative pressure during drainage procedures.

• Water-Seal Technology: A maintained water column creates a physical barrier against air reflux into patient cavities, significantly reducing infection risks.
• Dual Safety Valves: Integrated backflow prevention and overflow protection valves ensure system integrity during both gravity drainage and active suction.
• Dual-Port Configuration (2000ml model): Allows simultaneous connection of two drainage circuits for complex surgical cases requiring multi-site management.
• Precision Graduations: Clear milliliter markings enable accurate fluid output monitoring for clinical assessment.
• Medical-Grade Materials: Manufactured with biocompatible polymers to minimize allergic reactions.

• Post-thoracotomy drainage
• Abdominal surgical drainage
• Management of other surgical wound exudates

• The actual negative pressure at the patient interface will be approximately 2hPa less than the set pressure due to water-seal resistance.
• For thoracic drainage, the backflow prevention valve must remain connected when disengaging suction apparatus.
• Regular monitoring of water-seal evaporation and foam formation is essential for maintaining system efficacy.

The device interfaces with Izumi Medical's Mera Suction systems (MS-008, MS-008EX, and MS-009 models) and proprietary connector tubing.

Unopened units should be stored in dry conditions away from direct sunlight. The in-use duration should not exceed seven days post-activation.