Backflow from low-volume saliva ejectors occurs when the pressure in the patient,s mouth is less than that in the evacuator. This occurs when a patient closes the lips around the suction tip. This of course can be a source of potential contamination of the patient. Such backflow can also occur if the hose of the suction tip is positioned higher than the patient. Although no adverse health effects associated with the saliva ejector have been reported, practitioners should be aware that in certain situation, backflow could occur when using a saliva ejector and is potential source of contamination.
Recommendations
Special Consideration: Dental Handpieces and Other Devices Attached to Air and Waterlines
1. lean and heat-sterilize handpieces and other intra-oral instruments that can be removed from the air and waterline of dental units between patients.
2. Follow the manufacturer's instructions for cleaning, lubrication and sterilization of handpieces and other intra-oral instruments that can be removed from the air and waterlines of dental units.
3. Do not surface-disinfect, use liquid chemical sterilants or ethylene oxide on handpieces and other intra-oral instruments that can be removed from the air and waterlines of dental units.
4. Permanently attached devices should be covered with barriers such as plastic wrappings and should be replaced every after patient. If they are visibly soiled the DHCP should disinfect these devices with an acceptable disinfectant.
5. Do not advise patients to close their lips tightly around the tip of the saliva ejector to evacuate oral fluids.