Assertion: nitrous oxide | /r/HasAspect | rapid onset
Facets:
value: very
type: DEGREE
Source sentences:
text: In addition, its lower solubility in blood means it has a very rapid onset and offset, so a 50/50 mixture of nitrous oxide and oxygen ("gas and air", supplied under the trade name Entonox) is commonly used for pain relief during childbirth, for dental procedures, and in emergency medicine.