Hazardous objects that can be ingested include:
- button batteries and other batteries
- sharp objects
- very large objects
- filled balloons, etc
Read more about the causal effects of ingestion of foreign objects, both hazardous and non-hazardous, and the assessment and management .
A U wave is a small, rounded wave that follows the T wave on an electrocardiogram. Normally its polarity is that of the T wave. Its mechanism is unknown. The U wave becomes taller in hypokalaemia and inverted in heart disease. It may signify decreased potassium levels in the blood. Read more about U waves here.