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 99731-2: Pressure drop Renal replacement therapy circuit

Name: LOINC Code 99731-2: Pressure drop Renal replacement therapy circuit
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:34.290Z

99731-2 is a LOINC code used to identify Pressure drop Renal replacement therapy circuit 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 Pressure drop. It is commonly used with the system or sample type Renal replacement therapy circuit.

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 Pressure drop. It is commonly used with the system or sample type Renal replacement therapy circuit.

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

Pressure drop Renal replacement therapy circuit
Pressure drop
CLIN; Kidney; Point in time; QNT; Quan; Quant; Quantitative; Random; RRT circuit

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

Pressure drop Renal replacement therapy circuitPressure drop PressDiff RRT circuitPressure dropCLINPressDiffPtRenal replacement therapy circuit

Frequently asked questions

Code details

Code99731-2

SystemLOINC

Display namePressure drop Renal replacement therapy circuit

DescriptionPressure drop

Short namePressure drop PressDiff RRT circuit

ComponentPressure drop

PropertyPressDiff

TimingPt

System (specimen)Renal replacement therapy circuit

ScaleQn

ClassCLIN

Example unitsmm Hg

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Pressure drop

Part names

Pressure dropPressDiffPtRenal replacement therapy circuitQnPressure DifferencePoint 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.