LOINC Code 46091-5: RBC 3rd tube Manual cnt (CSF) [#/Vol]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Erythrocytes^3rd tube. It is commonly used with the system or sample type CSF.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both
• Method: Manual count

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Erythrocytes [#/volume] in Cerebral spinal fluid by Manual count --3rd tube
• Erythrocytes^3rd tube
• A sample of cerebrospinal fluid (CSF) is collected using a procedure called a lumbar puncture or spinal tap. Often, three or more separate tubes of CSF are collected (tube 1, tube 2, tube 3), and multiple tests may be run on the different tubes. Normally no erythrocytes are present in CSF. The presence of red blood cells may indicate bleeding into the CSF or may indicate a traumatic tap - blood that leaked into the CSF sample during collection. [Lab Tests Online]
• #; ABS; absolute; absolutes; Cerebral spinal fluid; Cerebrospinal Fl; Cnt; Count; Count/volume; CT; Discocytes; Erthrocyte; Erythrocyte; HEMATOLOGY/CELL COUNTS; Manl; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; tube3

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions