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HelpTest Code 7 Dehydro 7 Dehydrocholesterol
Clinical System Name
7 Dehydrocholesterol
Synonyms
Cholesterol Biosynthesis Intermediates
Smith-Lemli-Opitz Syndrome
Sample Requirements
Specimen: Whole Blood
Container(s): Lavender/EDTA or Dark Green/Sodium Heparin
Preferred Vol: 3 mL
Minimum Vol: 2 mL
Processing Instructions
Reject due to:
Spin: Y
Aliquot: Y
Temp: -20 C
Storage Location: CPA -20 Freezer, Send Outs rack
Off-site collection: Centrifuge whole blood within 2 hours of collection and aliquot plasma. Freeze aliquot at -20 C. Transport sample, frozen, to Seattle Children's Main Lab.
Stability
| Specimen Type | Temperature | Time |
| Room temp | N | |
| Refrigerated | N | |
| Frozen | Indefinitely |
Availability
| STAT | Performed | TAT |
| N | T - F | 3 - 5 d |
Performing Laboratory
Kennedy Krieger Institute
Biochemical Genetics Section, Room 526
707 North Broadway
Baltimore, MD 21205
Phone: (443) 923-2782
Department
Department: Send Outs
Phone Number: (206) 987-2563
CPT Codes
82542
Methodology
Method: Stable Isotope Dilution Gas Chromatography - Mass Spectrometry (GC/MS)
Analytical Volume: 1 mL plasma
Limitations:
Send Out Instructions
| Reference Test Name | 7-Dehydrocholesterol - Smith-Lemli-Opitz Syn. |
| Reference Test Code | |
| Instructions | Ship on dry ice Monday through Thursday via FedEx Priority Overnight. Kennedy Krieger Institute does not accept Saturday deliveries. |