Study on Patient Blood Management in Haematological Patients

There will be only one arm: the haematologists will all be included in the interventional phase.

Interventions are: 1) rewriting guidelines to order blood components; 2) to show the last hemoglobin value on the orders for erytrocytes and the last platelet count on the orders dor thrombocytes and 3)implementation of a clinical decision support system in the electronic rodering of blood components to stimulate restrictive blood transfusion.

• Guidelines will be updated and education will be given to haematologists in several ways.
• ICT implementations: a) last result of haemoglobin and platelet count will be shown on the electronic blood order; b) an electronical clinical decision support system will be implemented to order blood components

• ICT implementations in the electronic patient file

The investigators use a questionaire (15-20 questions) to evaluate how haematologists prescribe red blood cells and platelets. Do they analyze the haemoglobin and platelet count before and after each blood transfusion? Do they apply single unit policy for RBC and platelet transfusions? Which triggers are used for RBC and platelet transfusion? Which guidelines are followed? The investigators will send this questionnaire to all haematologists (including haematologists in training) in 2017 (premeasurement) and in 2019-2020 (postmeasurement).

The investigators will also use data (which is already available in the patient files) about blood transfusion to evaluate the ordering and administration of blood components during 1 year. For which indication is blood ordered? Is the Haemoglobin level known before the order is send to the blood bank?