*OTHERS INTERPRETATION*

**BLOOD VOLUME
 1. ELEVATED RED CELL MASS
-POLYCYTHEMIA RUBRA VERA
-SECONDARY POLYCYTHEMIA (COPD, AV FISTULAE, PICKWICKIAN SYNDROME)
-SMOKER'S POLYCYTHEMIA

2. NORMAL RED CELL MASS AND DECREASED PLASMA VOLUME
-BURNS
-DEHYDRATION
-DIARRHEA
-STRESS POLYCYTHEMIA
-VOMITING

**SEQUESTRATION STUDY
 1. RISING SPLENIC ACTIVITY
-HEREDITARY SPHEROCYTOSIS

2. INCREASED LIVER ACTIVITY
-SICKLE CELL DISEASE

**SCHILLING'S TEST
 1. ABNORMAL STATE I (B12 ONLY)
-ATROPHIC GASTRITIS
-GASTRECTOMY
-INCOMPLETE URINE COLLECTION
-PERNICIOUS ANEMIA

2. ABNORMAL STAGE II (B12 AND IF)
-CAUSES OF INTESTINAL MALABSORPTION
-TRANSCOBALAMIN II DEFICIENCY
-VITAMIN B12

3. FALSELY NORMAL
-FECAL CONTAMINATION OF URINE
-RECENT RADIOPHARMACEUTICAL ADMINISTRATION


*RED CELL SURVIVAL INTERPRETATION*
*SPECIAL IN VITRO PROCEDURES*