Full leg ulcer assessments are important in order to identify the aetiology of patients’ leg ulcer and Doppler ultrasounds form a part of this. Doppler assessment training is an integral part of any leg ulcer management course that all nurses who care for patients with leg ulcers should attend. However, it has been noted that incorrect Doppler readings still occur within practice. This article discusses some of the practices that can affect Doppler readings, thereby helping nurses to improve their Doppler assessments.