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 18105-7: Aortic valve Regurgitant blood flow pressure half-time by US.doppler

Name: LOINC Code 18105-7: Aortic valve Regurgitant blood flow pressure half-time by US.doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.585Z

18105-7 is a LOINC code used to identify Aortic valve Regurgitant blood flow pressure half-time by US.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 Regurgitant blood flow pressure half-time. It is commonly used with the system or sample type Aortic 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 Regurgitant blood flow pressure half-time. It is commonly used with the system or sample type Aortic 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.doppler

What it does not mean

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

Key facts

Aortic valve Regurgitant blood flow pressure half-time by US.doppler
Regurgitant blood flow pressure half-time
MC686; Time from peak AR gradient to 1/2 peak gradient
AO; AoV; AV; Bld flow; CARD.US; Cardio; Cardiology; DOP; DUPLEX; Dynamic; Echography; Heart Disease; P1/2T; PHT; Point in time; QNT; Quan; Quant; Quantitative; Random; Regurg PHT; Sonogram; Sonograph; Sonography; T1/2; ULS; Ultrasound

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

Aortic valve Regurgitant blood flow pressure half-time by US.dopplerAV Regurg PHT DOPRegurgitant blood flow pressure half-timeCARD.USTimePtAortic valve

Frequently asked questions

Code details

Code18105-7

SystemLOINC

Display nameAortic valve Regurgitant blood flow pressure half-time by US.doppler

DescriptionRegurgitant blood flow pressure half-time

Short nameAV Regurg PHT DOP

ComponentRegurgitant blood flow pressure half-time

PropertyTime

TimingPt

System (specimen)Aortic valve

ScaleQn

MethodUS.doppler

ClassCARD.US

Example unitsms

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.67

Part names

Regurgitant blood flow pressure half-timeTimePtAortic valveQnUS.dopplerTime (e.g. seconds)Point in time (spot)Ultrasound.doppler

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.