LOINCActiveObservation

LOINC Code 80403-9: Respiratory wave amplitude

80403-9 is a LOINC code used to identify Respiratory wave amplitude 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 Respiratory wave amplitude. It is commonly used with the system or sample type Respiratory system.

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 Respiratory wave amplitude. It is commonly used with the system or sample type Respiratory system.

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

  • Respiratory wave amplitude
  • The amplitude of the respiratory waveform. This term was created for, but is not limited in use to, the Zephyr BioHarness, a physiological monitoring belt device that captures and transmits multiple physiologic parameters. The BioHarness determines the respiratory waveform amplitude from its piezoelectric sensors, and the normal range for this parameter is 0-0.5 volts.
  • Breathing; CARDIO-PULM; Electrical potential; Lung; Lungs; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Resp wave amp; Respiratory; RS; Voltage

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

Respiratory wave amplitudeResp wave ampCARDIO-PULMElpotPtRespiratory systemQn

Frequently asked questions

Code details

Code80403-9
SystemLOINC
Display nameRespiratory wave amplitude
Short nameResp wave amp
ComponentRespiratory wave amplitude
PropertyElpot
TimingPt
System (specimen)Respiratory system
ScaleQn
ClassCARDIO-PULM
Example unitsv
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.54

Part names

Respiratory wave amplitudeElpotPtRespiratory systemQnElectrical Potential (Voltage)Point in time (spot)

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 80403-9 | HealthAssure