Chronic obstructive pulmonary disease (COPD) is under-diagnosed due to time constraints in community-based clinics and costs related to diagnostic spirometry. Early diagnosis results in improved quality of life if COPD is managed well. This literature review aims to determine the accuracy and helpfulness of the mini-spirometer as a screening tool for COPD, to improve health outcomes for patients with COPD. It was carried out in New Zealand, where 15% of people over the age of 40 years have COPD and where prevalence in Maori is more than double that of non-Maori populations, and community screening initiatives are required to ensure early intervention and disease prevention.