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Test ID BLOD1054 Luteinizing Hormone (LH), Pediatrics, Serum

Secondary ID

62999

Useful For

Diagnosis of precocious puberty and delayed puberty in children

Method Name

Chemiluminescent Immunoassay (CIA)

Reporting Name

LH, Pediatrics, S

Specimen Type

Serum


Ordering Guidance


This test is only available for pediatric patients. If testing request is for a patient 18 years of age or older, order LH / Luteinizing Hormone (LH), Serum.



Specimen Required


Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 0.25 mL

Collection Instructions:

1. Red-top tubes should be centrifuged, and the serum transferred to a plastic vial within 2 hours of collection.

2. Serum gel tubes should be centrifuged within 2 hours of collection.


Specimen Minimum Volume

0.13 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  90 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Reference Values

Females

<1 year: <0.02-18.3 IU/L

1-8 years: <0.02-0.3 IU/L

9-10 years: <0.02-4.8 IU/L

11-13 years: <0.02-11.7 IU/L

14-17 years: <0.02-16.7 IU/L

 

Tanner Stages*

Stage I (1-8 years): <0.02-0.3 IU/L

Stage II: <0.02-4.1 IU/L

Stage IIl: 0.6-7.2 IU/L

Stage IV-V: 0.9-13.3 IU/L

*Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for girls at a median age of 10.5 (± 2) years. There is evidence that it may occur up to 1 year earlier in obese girls and in African-American girls. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.

 

Males

<1 year: <0.02-5.0 IU/L

1-8 years: <0.02-0.5 IU/L

9-10 years: <0.02-3.6 IU/L

11-13 years: 0.1-5.7 IU/L

14-17 years: 0.8-8.7 IU/L

 

Tanner Stages*

Stage I (1-8 years): <0.02-0.5 IU/L

Stage II: 0.03-3.7 IU/L

Stage IIl: 0.09-4.2 IU/L

Stage IV-V: 1.3-9.8 IU/L

*Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for boys at a median age of 11.5 (± 2) years. For boys there is no proven relationship between puberty onset and body weight or ethnic origin. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.

Day(s) Performed

Monday, Wednesday, Friday

Report Available

2 to 6 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

83002

Sanford Laboratories - Bemidji Additional Information:

Sanford Interface Build Information

Result Code Result Code Description
20227 LH With Tanner Stages