Inclusion Criteria:  Adults, age = or > 18 years; Both sex; Admitted to the clinical inpatient units on the hospital where the study will be conducted (HCPA), with indication of peripheral venous puncture; Patients who do not configure emergency care.  Exclusion Criteria:  Patients who have already received ultrasound-guided peripheral venipuncture at the current hospitalization; Patients in a critical or unstable clinical condition; Patients admitted to surgical units at HCPA; Patients in coronavirus (COVID-19) care units.