child
30:2
It all depends on what they ate.
One breath every 5 seconds for an adult, 1 breath every 3 seconds for an Infant & Child.
Each breath should last 1 second, with or without the use of a breathing barrier. This is the same amount of time for a child and adult.
30 chest compression then 2 breaths for an adult and 15 chest compression and 1 breath for an infant or child.
Breaths don't change when using a BVM; 1 breath every 5 seconds for an Adult & 1 breath every 3 seconds for an Infant & Child.
A child is, by definition, not a adult An adult is not, by definition, a child Thus there is no such thing as an 'adult child' - your question is therefore impossible to answer.
Probably not worth your time. At eighteen, you are legally an adult and should be supporting yourself. Child support is usually an agreement between parents to provide for their child.
If there is one parent left after their spouse dies, then they keep the child/ren. If both die, it is up to the court to decide who keeps the child/ren. If both die and there is no record of family, the child is sent to a care home for children, and from there is kept until legally an adult, or is fostered or adopted.
A parent can get the medical records of an adult child if the adult child gives express permission.
A child can threaten to hold their breath until they die; however, they can realistically only hold their breath until they pass out.
30 compressions per 2 breaths for 1 rescuer adult/child/infant 15 compressions per 2 breaths for 2 rescuer child/infant