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.

LOINCActive

LOINC Code 8424-4: Descending thoracic aorta Systolic blood pressure

Name: LOINC Code 8424-4: Descending thoracic aorta Systolic blood pressure
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:11.790Z

8424-4 is a LOINC code used to identify Descending thoracic aorta Systolic blood pressure 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 Intravascular systolic. It is commonly used with the system or sample type Aorta.thoracic.descending.

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 Intravascular systolic. It is commonly used with the system or sample type Aorta.thoracic.descending.

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

What it does not mean

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

Key facts

Descending thoracic aorta Systolic blood pressure
Intravascular systolic
AO; Aortic; Blood pressure; BLOOD PRESSURE MEASUREMENTS.CENTRAL.MOLEC; Blood pressure systolic; BP; BP sys; BP systolic; Cardio; Cardiology; DTA; Heart Disease; Intravenous; IV; Point in time; Pressure; QNT; Quan; Quant; Quantitative; Random; SBP; Sys BP; Thorax

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

Descending thoracic aorta Systolic blood pressureDTA BP sysIntravascular systolicBP.CENT.MOLECPresPtAorta.thoracic.descending

Frequently asked questions

Code details

Code8424-4

SystemLOINC

Display nameDescending thoracic aorta Systolic blood pressure

DescriptionIntravascular systolic

Short nameDTA BP sys

ComponentIntravascular systolic

PropertyPres

TimingPt

System (specimen)Aorta.thoracic.descending

ScaleQn

ClassBP.CENT.MOLEC

Example unitsmm Hg

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.54

Part names

Intravascular systolicPresPtAorta.thoracic.descendingQnPressurePoint in time (spot)Aorta thoracic descending

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.