PORH and Response to Cold in Raynaud's Phenomenon.

Inclusion Criteria: * Neither raynaud's phenomenon or chronic disease for healthy volunteers * Raynaud's phenomenon without connective tissue disease for patients in the group "Raynaud" Exclusion Criteria: * History of axillary dissection , trauma or surgery * History of thromboembolic disease or thrombophilia * Minor or law-protected major * Exclusion period in another study * No affiliation to medicare * Pregnant, parturient or breasting woman * Concomitant serious disease: progressive cancer, liver failure, history of myocardial infarction less than 5 years, angor * Smoking in the 6 last months * Person deprived of liberty by a legal or administrative decision, person under legal protection * Maximal annual indemnification reached.