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 79933-8: Tricuspid valve Vena contracta diameter during systole by US.2D+doppler

Name: LOINC Code 79933-8: Tricuspid valve Vena contracta diameter during systole by US.2D+doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.838Z

79933-8 is a LOINC code used to identify Tricuspid valve Vena contracta diameter during systole by US.2D+doppler 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 Vena contracta diameter.systole. It is commonly used with the system or sample type Tricuspid valve.

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 Vena contracta diameter.systole. It is commonly used with the system or sample type Tricuspid valve.

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.2D+doppler

What it does not mean

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

Key facts

Tricuspid valve Vena contracta diameter during systole by US.2D+doppler
Vena contracta diameter.systole
2D US; CARD.US; CARD.US.DICOM; Cardio; Cardiology; DIA; Diam; diam S; Diam sys; Echography; Heart Disease; Length; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Sys; Syst; TV; ULS; Ultrasound; Ultrasound - 2-dimensional; VC diam; VC diameter sys

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

Tricuspid valve Vena contracta diameter during systole by US.2D+dopplerTV VC diameter sys US.2D+DOPVena contracta diameter.systoleCARD.US.DICOMLenPtTricuspid valve

Frequently asked questions

Code details

Code79933-8

SystemLOINC

Display nameTricuspid valve Vena contracta diameter during systole by US.2D+doppler

DescriptionVena contracta diameter.systole

Short nameTV VC diameter sys US.2D+DOP

ComponentVena contracta diameter.systole

PropertyLen

TimingPt

System (specimen)Tricuspid valve

ScaleQn

MethodUS.2D+doppler

ClassCARD.US.DICOM

Example unitscm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.67

Part names

Vena contracta diameter.systoleLenPtTricuspid valveQnUS.2D+dopplerVena contracta diameter during systoleLengthPoint 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.