Do you need to be hospitalized for foaming experiments

No need. A foaming test is a heart test that does not require hospitalization and can be done on an outpatient basis. The foaming test requires an indwelling needle in the elbow, two syringes to mix saline, blood and air together, and push the syringes back and forth to mix the three, because by pushing back and forth inside the mixture contains a large number of microbubbles, so it is called foaming test.