You can see this at play with the hot dog: the sandwich and sausage were both invented elsewhere, so to celebrate them separately as uniquely American on America's day of independence would present an empty gesture, immediately undermined by the tools used to make it.
An Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.n Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.
A subdural haematoma is a collection of clotting blood that forms in the subdural space. This is the space between two of the meninges, which form the protective lining that covers the brain. It usually occurs because of a head injury.It is a serious condition and emergency treatment may be needed. subdural haematoma is a collection of clotting blood that forms in the subdural space. This is the space between two of the meninges, which form the protective lining that covers the brain. It usually occurs because of a head injury.