[Ethyl chloride].

The control of symptoms in general and pain in particular, remains a current topic in scientific conferences and meetings, and discussed the recommendations of the Scientific Societies. Do not suffer unnecessary pain because the treatment is a right of every patient and facilitating action to control it, by nurses, is an expression of respect for that right. A common procedure nursing care consists of venous and arterial puncture for blood samples or to place catheters for different purposes, these procedures are painful for the patient and sometimes unpleasant by the need to perform them repeatedly. There are different relaxation techniques that can help to reduce this effect in the body but also have pharmacological interventions to help decrease the pain associated with vascular punctures. One of them, easy to use, quick to act and no side effects is the use of topical anesthesia by cold ethyl chloride.