in guideline Phenotype of Sickle Cell Disease Acute Splenic Sequestration Crisis Acute Crisis Splenic Sequestration Few but definitions not freely available Request inclusion into relevant ontology Vijay, V., Cavenagh, J.D. and Yate, P., 1998. The anaesthetist's role in acute sickle cell crisis. British journal of anaesthesia, 80(6), pp.820-828. Significant change in blood picture characterised by a precipitous fall in the haemoglobin level of at least 20 g/l and accompanied by a rapidly enlarging spleen or liver (greater than 2 cm from the steady state level) and reticulocytosis above the steady state level for each individual patient. Signs of acute circulatory insufficiency such tachypnoea, tachycardia, and hypotension may or may not be present. It is the earliest life-threatening complication seen in patients with SCD besides pneumococcal infections. SCDO Acute Phenotype Recommendations for the Management of Sickle Cell Disease in South Africa Management of Sickle Cell Disease - The United Republic of Tanzania Standards for Clinical Care of Adults with Sickle Cell Disease in the UK Sickle Cell Disease: The Clinical Care Guidelines of the Sickle Cell Unit Consensus Statement on the Care of Patients with Sickle Cell Disease in Canada Sickle Cell Disease in Children, Standards and Guidelines for Clinic Care Evidence-Based Management of Sickle Cell Disease Management of Children with Sickle Cell Disease in Europe: Current Situation and Future Perspectives