LOINCActiveObservation

LOINC Code 3166-6: Specimen volume (24H Sweat) [Vol/Time]

3166-6 is a LOINC code used to identify Specimen volume (24H Sweat) [Vol/Time] 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 Specimen volume. It is commonly used with the system or sample type Sweat.

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 Specimen volume. It is commonly used with the system or sample type Sweat.

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

What it does not mean

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

Key facts

  • Volume [Flow] of 24 hour Sweat
  • Specimen volume
  • 1 day; 24 hours; 24HR; Flow; QNT; Quan; Quant; Quantitative; Spec; SWT; Vol; Volume rate; vRate

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

Specimen volume (24H Sweat) [Vol/Time]Volume [Flow] of 24 hour SweatSpecimen vol 24h Sweat-vRateSpecimen volumeSPECSpecimen volume, SweatVRat

Frequently asked questions

Code details

Code3166-6
SystemLOINC
Display nameSpecimen volume (24H Sweat) [Vol/Time]
DescriptionSpecimen volume
Short nameSpecimen vol 24h Sweat-vRate
ComponentSpecimen volume
PropertyVRat
Timing24H
System (specimen)Sweat
ScaleQn
ClassSPEC
Example unitsmL/24 H
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.42

Consumer names

Specimen volume, Sweat

Part names

Specimen volumeVRat24HSweatQnVolume Rate24 hours

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.

LOINC Code 3166-6 | HealthAssure