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LOINC Code 87378-6: Tubular extraction rate/1.73 sq M Isotopic (S/Bld) [Vol rate/Area]

87378-6 is a LOINC code used to identify Tubular extraction rate/1.73 sq M Isotopic (S/Bld) [Vol rate/Area] 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 Tubular extraction rate/1.73 sq M. It is commonly used with the system or sample type Ser/Bld.

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 Tubular extraction rate/1.73 sq M. It is commonly used with the system or sample type Ser/Bld.

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: Both
  • Method: Isotopic

What it does not mean

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

Key facts

Isotopic Tubular extraction rate/1.73 sq M [Volume Rate/Area] in Serum or Blood
Tubular extraction rate/1.73 sq M
This test is for the tubular extraction rate (TER) based on the clearance of a radioisotope (e.g., 99mTc-MAG3). The TER can be calculated using various algorithms, including continuous infusion, single injection, single sample, and the two-compartment model. [PMID11545186]. Clearance calculation methods may differ for children [PMID:1831838]. Radioisotopes, such as 99mTc-MAG3, provide evidence of tubular clearance because 99mTc-MAG3 is selectively filtered by the renal tubule and not by glomerular filtration. Tc-99m Mertiatide (99mTc-MAG3) is also a radiopharmaceutical used for renography [PMID:11545186]. To report the results of a renography study (and not TER measurement), use [LOINC:39746-3].
Blood; BSA; Chemistry; Point in time; QNT; Quan; Quant; Quantitative; Random; SerBld; Serum; Serum or whole blood; Square Meter; SR; TER; Volume rate/area; Volume Rate/Ratio; WB; Whole blood

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

Tubular extraction rate/1.73 sq M Isotopic (S/Bld) [Vol rate/Area]Isotopic Tubular extraction rate/1.73 sq M [Volume Rate/Area] in Serum or BloodIsotopic TER/1.73 sq M SerBld-ArVRatTubular extraction rate/1.73 sq MCHEMTubular extraction rate/1.73 Sq M, BloodArVRat

Frequently asked questions

Code details

Code87378-6
SystemLOINC
Display nameTubular extraction rate/1.73 sq M Isotopic (S/Bld) [Vol rate/Area]
DescriptionTubular extraction rate/1.73 sq M
Short nameIsotopic TER/1.73 sq M SerBld-ArVRat
ComponentTubular extraction rate/1.73 sq M
PropertyArVRat
TimingPt
System (specimen)Ser/Bld
ScaleQn
MethodIsotopic
ClassCHEM
Example unitsmL/min/1.73 sq m
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.63
Last changed2.63

Consumer names

Tubular extraction rate/1.73 Sq M, Blood

Part names

Tubular extraction rate/1.73 sq MArVRatPtSer/BldQnIsotopicVolume Rate/AreaPoint in time (spot)Serum or Blood

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.