Click here for more information about laboratory operations and procedures
Cystic Fibrosis CBAVD Poly T Mutation
|Utilization Guidelines||Tests with long turn-around times (ie. Molecular based tests and Microarrays) should only be requested on an inpatient if the result is going to affect the inpatient management.
If the patient will likely be discharged before the result will be available, the test should be requested after discharge. (NOTE: UCSF Medical Center is not reimbursed for inpatient testing).
An exception to the above may be appropriate if there is a possibility the patient will not survive to be discharged and the information is important for diagnosis and/or family decisions/management (ie. recurrence risk).
|Test group||Cystic Fibrosis|
|Performed by||Molecular Diagnostics|
|In House Availability||Run 1x per week, Monday-Friday, day shift only|
|Method||PCR and allele-specific probes|
|Collection Instructions||If collecting in citrate, check the expiration date on the label of the blue top vacutainer before drawing the patient
Do not collect sample in heparin. Keep sample refrigerated for overnight or longer storage.
For UCSF Samples (from remote sites) Click here for sample collection instructions
For NON-UCSF Samples Click here for Requisition form & Account set-up instructions. Note we only do institutional billing.
|Container type||Lavender top, Blue (citrate) and Yellow (ACD) tops acceptable|
|Amount to Collect||3 mL blood|
|Sample type||EDTA whole blood, Tissue culture CVS|
|Preferred volume||3 mL blood|
|Min. Volume||0.5 mL blood|
|UCSF Rejection Criteria||Samples collected in outdated blue top vacutainer.|
|Processing notes||Do not centrifuge the specimen. Store at room temperature. Refrigerated samples are acceptable.|
|Normal range||5T allele not detected|
|Synonyms||PCR; CF Poly T|
|Turn around times||7-10 days|
|Additional information||An interpretation of this test by a laboratory physician will automatically be performed and billed for separately.
This test detects the 5T variant at the CFTR exon 9 splice site, which has been implicated in congenital bilateral absence of the vas deferens. The mutation can also affect the phenotype of some mild CF mutations.
If a mutation is detected it is recommended that the patient seek genetic counseling.
Note: This test was developed and its performance characteristics determined by the Clinical Laboratories at the Medical Center at UC San Francisco. It has not been cleared or approved by the U.S. Food and Drug Administration.
|LDT or Mod FDA?||Yes|
|Last Updated||9/10/2013 8:44:56 AM|
If you have additional questions regarding this test, please call: 415-353-1667