General practice Flashcards
General definition of anemia
Decrease in the quantity of circulating RBCs, represented by a reduction in Hemoglobin concentration (Hb), hematocrit (Hct) or RBC count
Generalised causes of anemia
Inadequate RBC production
Excessive RBC destruction
Blood loss
Clinical features of anemia
Fatigue
Dyspnea
Conjunctival pallor
Tachycardia
Pica (craving for dirt or ice)
Diagnostic criteria for anemia
Hb < 13g/dL in males
Hb < 12g/dL in females
Mechanism and MCV of microcytic anemia
Insufficient haemoglobin production
<80 MCV (fL)
Mechanism and MCV of normocytic anemia
Decreased blood volume and/or decreased erythropoiesis
MCV 80-100
Mechanism and MCV of macroocytic anemia
Insufficient nucleus maturation relative to cytoplasm expansion, due to:
- Defective DNA synthesis
- Defective DNA repair
MCV >100
Causes of microcytic anemia
IRON LAST
IRON deficiency
Lead poisioning
Anemia of chronic disease
Sideroblastic anemia
Thalassemia
Causes of normocytic anemia
Hemolytic anemia
Sickle cell anemia
Infections
Blood loss
Aplastic anemia
Anemia of chronic kidney disease
Iron deficiency anemia (in early phase)
Anemia of chronic disease
Causes of macrocytic anemia
Megaloblastic anemia:
Vitamin B12 deficiency
Folate deficiency
Medications
Fanconi anemia
Non-megaloblastic anemia:
Liver disease
Alcohol use
SADPERSONS risk assessment
Sex (male+1)
Age (<19,>45)
Depression or hopelessness (+2)
Previous attempts or psychiatric care
Excessive alcohol or drug use
Rational thinking loss (+2)
Separated/divorced/widowed
Organised or serious attempt
No social supports
Stated future intent (+2)
> 6 requires hospitalisation