FACTOR XIII: (089-0013)

 Qualitative measurement of Factor XIII which, when present, stabilizes a fibrin clot.

 FACTORXIII

 Clot Solubility with 5M Urea

 Accepted 24 hours/day at Sample Management, Room 5.136 McCullough.

  24 hours

Collect: Routine venipuncture; discard 1st mL of blood or collect other tubes (EDTA, red-topped) prior to collecting sample in blue-topped (3.2% sodium-citrate) tube.

Specimen Preparation: Samples should be received in laboratory within ½ hour of draw for best results.  Acceptable up to 4 hours after draw, at ROOM TEMPERATURE.

Specimen: Blood

Volume: 2.7ml

Minimum Volume: Call Lab

Storage/Transport: NOTE:  If delivery time is to be greater than 4 hours from time of draw, centrifuge the sample, separate the plasma from the cells and snap freeze (-20⁰C) the plasma.

Stability: Snap frozen plasma is viable for 6 months.

Causes for Rejection: QNS, clotted, severely hemolyzed specimen, specimen greater than 4 hours old, wrong tube (3.8% sodium citrate), high hematocrit (> 55%), identification error, sample processed/transported, and/or stored improperly.

Interfering Substances: Heparin, Fibrin split products, Factor XIII antibodies

Normal = no lysis after 24 hours

 85290

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient.  Components of the organ or disease panels may be ordered individually.  The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-9 code or its verbal equivalent.

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