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  The answer will be negative. Winner manual resuscitator, including the  silicone resuscitator ,  SEBS resuscitator  and  PVC resuscitator  will be properly functioned without the membranes.And we suggest not to have this membrane on the patient valve for two reasons, 1. The membrane will cause difficulty in oberseving if patient vomits. That part should be transparent visible. 2. The Expiratory resistance will be increased if with the membrane as the membrane will block the exhalation channel slightly. Yet,  Winner  still offer the optional of membrances just to meet the customers’s using habit. The customers are accustomed to using the manual resuscitation bag with membranes which were produced by other factories for many year.

  During a disaster event, you and/or your family will require specific items. Assemble supplies before disasters occur, including supplies for various locations (e.g., home, work, vehicle). Recommended Supplies To Include In A Basic Kit: *Water, one gallon of water per person per day, for drinking and sanitation *Food, at least a three-day supply of non-perishable food *Battery-powered radio and a NOAA Weather Radio with tone alert and extra batteries for both *Flashlight and extra batteries *First Aid kit *Whistle to signal for help *Infant formula and diapers, if you have an infant *Moist towelettes, garbage bags and plastic ties for personal sanitation *Dust mask or cotton t-shirt, to help filter the air *Plastic sheeting and duct tape to shelter-in-place *Wrench or pliers to turn off utilities *Can opener for food (if kit contains canned food) Xiamen Winner  is a manufacturer of  first aid products  for emergency situation, such as manual resuscitator/ambu bag, ...