HOME THERAPY AREAS New opinion from WHO on Patient Blood Management (PBM) 26 Janeiro 2022 Deficiência de Ferro Patient Blood Management In a paper published in December 2021, the WHO Patient Blood Management (PBM) Working Group called for PBM to be implemented as soon as possible (WHO policy brief "The Urgent Need to Implement Patient Blood Management"). This urgency is based on specific factors as listed in the below PDF.