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 18050-5: Inferior vena cava Fractional collapse by US --inspiration

Name: LOINC Code 18050-5: Inferior vena cava Fractional collapse by US --inspiration
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.585Z

18050-5 is a LOINC code used to identify Inferior vena cava Fractional collapse by US --inspiration 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 Fractional collapse^inspiration. It is commonly used with the system or sample type Vena cava.inferior.

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 Fractional collapse^inspiration. It is commonly used with the system or sample type Vena cava.inferior.

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: US

What it does not mean

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

Key facts

Inferior vena cava Fractional collapse by US --inspiration
Fractional collapse^inspiration
CARD.US; Cardio; Cardiology; Echography; Fract collapse; Heart; Heart Disease; In; Inf; Insp; Inspiratory; IVC; Length Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; VC

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

Inferior vena cava Fractional collapse by US --inspirationIVC Fract collapse insp USFractional collapse^inspirationCARD.USLenFrPtVena cava.inferior

Frequently asked questions

Code details

Code18050-5

SystemLOINC

Display nameInferior vena cava Fractional collapse by US --inspiration

DescriptionFractional collapse^inspiration

Short nameIVC Fract collapse insp US

ComponentFractional collapse^inspiration

PropertyLenFr

TimingPt

System (specimen)Vena cava.inferior

ScaleQn

MethodUS

ClassCARD.US

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.48

Part names

Fractional collapse^inspirationLenFrPtVena cava.inferiorQnUSLength fractionPoint in time (spot)Inferior vena cavaUltrasound

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.