RBCC

RBCC is an acronym with multiple meanings, but in medical testing RBCC commonly stands for Red Blood Cell Count. It is a routine laboratory measurement that quantifies the number of erythrocytes in a specified volume of blood, typically expressed as cells per microliter (µL) or as x10^12 cells per liter. In adults, reference ranges are approximately 4.7–6.1 million/µL for men and 4.2–5.4 million/µL for women; ranges vary by age, pregnancy, altitude, and lab methodology.

RBCC is part of a standard complete blood count (CBC) and is interpreted alongside hemoglobin concentration, hematocrit, and red cell indices such as mean corpuscular volume (MCV). A reduced RBCC can indicate anemia or bone marrow suppression; an elevated RBCC may reflect polycythemia, hypoxic states such as high altitude, dehydration, or smoking. It is also influenced by circadian variation and recent fluid status. Abnormal RBCCs prompt further evaluation for iron status, vitamin deficiencies, chronic disease, or marrow disorders.

Measurement methods include automated hematology analyzers that use electrical impedance or optical techniques, and, less commonly, manual counting methods like a hemocytometer for verification. Samples are typically venous blood collected in an anticoagulant tube.

While primarily a medical parameter, the term RBCC may also refer to rocket-based combined cycle propulsion in aerospace contexts, describing engines that operate across multiple propulsion modes using shared components. See also: anemia, polycythemia, CBC, MCV.