What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 79555-9: Fluid output total intraoperative [Volume] Measured

Name: LOINC Code 79555-9: Fluid output total intraoperative [Volume] Measured
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.837Z

79555-9 is a LOINC code used to identify Fluid output total intraoperative [Volume] Measured in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Fluid output.total intraoperative. It is commonly used with the system or sample type ^Patient.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Fluid output.total intraoperative. It is commonly used with the system or sample type ^Patient.

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: Observation
Method: Measured

What it does not mean

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

Key facts

Fluid output total intraoperative [Volume] Measured
Fluid output.total intraoperative
Fld; Fluid output total; Fluid output total intraop; IO_OUTPUT; IO_OUTPUT.MOLEC; QNT; Quan; Quant; Quantitative; Tot; Totl; Volume

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

Fluid output total intraoperative [Volume] MeasuredFluid output total intraop Vol MeasFluid output.total intraoperativeIO_OUT.MOLECVolProcedure dur^Patient

Frequently asked questions

Code details

Code79555-9

SystemLOINC

Display nameFluid output total intraoperative [Volume] Measured

DescriptionFluid output.total intraoperative

Short nameFluid output total intraop Vol Meas

ComponentFluid output.total intraoperative

PropertyVol

TimingProcedure dur

System (specimen)^Patient

ScaleQn

MethodMeasured

ClassIO_OUT.MOLEC

Example unitsmL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Part names

Fluid output.total intraoperativeVolProcedure dur^PatientQnMeasuredVolumeProcedure duration

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.