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Back to Test Catalogue
Test ID: LDISOENZP S

Lactate Dehydrogenase (LD) Isoenzyme Panel, Serum

Test Overview

Clinical Utility

Lactate dehydrogenase (LD) is present in many different organs and tissues such as liver, heart, muscles, kidney, lungs and blood. The usual designation of isoenzymes is LD-I, LD-II, LD-III, LD-IV and LD-V. LD isoenzymes tissue specificity is derived from the fact that LD subunits are synthesized in well-defined ratios and could be used in investigating unexplained causes of Total LD elevations and detection of macro-LD. Do not use LD isoenzymes to detect myocardial injury.

Method

Electrophoresis - spectrophotometry

Result Included

Lactate Dehydrogenase (LD); Lactate Dehydrogenase Isoenzymes LD1; LD2; LD3; LD4; LD5

Specimen

Specimen Type

Serum

Containers

Collection Containers

Gold top (clot activator & gel)

Volume

Sample Volume

2 mL

Minimum Volume

1 mL

Collection & Handling

Handling Information

Separate within 1 hour of collection. Do not refrigerate or freeze the specimens. Store and send at ambient temperature.

Stability

Ambient Refrigerated Frozen
7 days Unacceptable Unacceptable

Rejection Criteria

Criteria Specification
Hemolysis Present
Specimen Received refrigerated or frozen

Performance & Interpretation

Turnaround Time

10 days

Results

Name
Units
Reference Range
Conversion
  1. LD
    U/L
    Male
    < 1 Month: 125 -735
    1 - 11 Months: 170 - 450
    1 - 3 Years: 155 - 345
    4 - 6 Years: 155 - 345
    7 - 10 Years: 140 - 270
    11 - 13 Years: 110 - 250
    14 - 17 Years: 110 - 230
    18 - 49 Years: 100 - 220
    > 49 Years: 120 - 250
    Female
    < 1 Month: 145 - 765
    1 - 11 Months: 190 - 420
    1 - 3 Years: 165 - 395
    4 - 6 Years: 135 - 345
    7 - 10 Years: 140 - 270
    11 - 13 Years: 110 - 250
    14 - 17 Years: 110 - 230
    18 - 49 Years: 100 - 200
    > 49 Years: 120 - 250
  2. LD1
    &percnt;
    18 - 32
  3. LD2
    &percnt;
    29 - 42
  4. LD3
    &percnt;
    14 - 30
  5. LD4
    &percnt;
    6 - 13
  6. LD5
    &percnt;
    5 - 18

Referral Location

Out-of-Country

Interface & Setup

HL7 Interface Codes

Order Code Result Name Result Codes Units
LDISOENZP S LD 65324 U/L
LD1 65325 &percnt;
LD2 65326 &percnt;
LD3 65327 &percnt;
LD4 65328 &percnt;
LD5 65329 &percnt;

Test Version

Last Updated

2024-01-19