Anaemia
Also: anemia · low haemoglobin · iron deficiency
Anaemia is a reduced haemoglobin level with many causes — iron, B12 or folate deficiency, chronic disease, blood loss and more. The pattern of the blood count helps point to the cause and treatment.
The relevant calculators, drugs and explainers are gathered here.
Calculators & scores
- Iron Deficiency Anaemia CalculatorAnaemia Assessment
- Corrected Reticulocyte Count / Reticulocyte Production IndexAnaemia
- Ganzoni Equation for Iron DeficiencyAnaemia
- Transferrin Saturation CalculatorAnaemia / Iron Studies
- CTCAE Grading for AnaemiaToxicity Grading
- Reticulocyte Production Index (RPI)Anaemia Assessment
- Ferritin Iron Store InterpretationHaematological Values
- Red Cell Transfusion Threshold AssessmentBlood Transfusion
- Arterial Oxygen Content (CaO₂)ABG / Respiratory
- Corrected Count Increment (CCI) for Platelet TransfusionTransfusion Medicine
- WPSS — WHO Prognostic Scoring System for MDSCancer Prognosis
- HScore for Reactive Haemophagocytic Syndrome (HLH)Haematological Emergency
- ABC Score for Massive TransfusionTransfusion Medicine
- Maximum Allowable Blood LossTransfusion Medicine
Decision pathways
- Iron Deficiency AnaemiaBSG 2021; BSH
- Anaemia InvestigationBSH / NICE
- Major Haemorrhage / Massive TransfusionBCSH; RCOA; RCEM; RCS — BCSH Guidelines
- Lower Gastrointestinal BleedBSG 2019; NICE NG141
- Chronic Fatigue WorkupNICE NG206; BMJ Best Practice
- Pre-op Medical ClearanceNICE NG45; ESC 2022
- Blood Transfusion — Indications and SafetyBSH 2012 / NICE
- B12 / Folate DeficiencyBSH 2014; NICE CKS
Drugs
- Ferrous sulfate with folic acidIron + folate supplement
- Ferrous fumarate with folic acidIron + folate supplement
- Hydroxocobalamin (High-Dose — Cyanide Antidote)Cyanide Antidote (Vitamin B12 Precursor at High Dose)
- Ferric CarboxymaltoseHeart Failure
- Hydroxocobalamin (Cyanokit)Cyanide antidote
- Folic AcidVitamin B9 Supplement
- Hydroxocobalamin (Vitamin B12)Vitamin B12 Supplement / Cyanide Antidote
- HydroxocobalaminVitamin B12 — Megaloblastic Anaemia
- Ferrous fumarateOral ferrous iron
- Ferrous sulfateOral ferrous iron
- Ferrous sulfate with ascorbic acidOral iron + vitamin C
- Folic Acid (Pre-conception and Pregnancy)Vitamin / Neural Tube Defect Prevention
Patient explainers
Decision support only. These tools are aggregated by topic to aid navigation — always apply clinical judgement and the relevant national or local guideline.