Vanillymandelic Acid Random Administration of L-dopa may falsely increase vanillylmandelic acid
results; it should be discontinued 24 hours prior to and during
collection of specimen.
VARICELLA ZOSTER AB, IGM Aids in the diagnosis of acute and recent infection with varicella-zostervirus
Varicella Zoster IGG Diagnose Varicella zoster infection; determine adult susceptibility to
infection. Both chicken pox and shingles are caused by the varicella
zoster IgG which is a type of …
Varicella Zoster Virus Ab, IgG/IgM, CSF Useful to diagnose viral meningitis.
COMPONENTS: Q0395 VARICELLA ZOSTER AB IGM CSF LOINC 22605-0; Q0396 VARICELLA ZOSTER AB IGG CSF LOINC 22601-9
Varicella-Zoster PCR, CSF/Dermal Useful For: Rapid (qualitative) detection of VZV DNA in clinical
specimens (dermal sources, cerebrospinal fluid [CSF]) for laboratory
diagnosis of disease due to this vir…
Vascular Endothelial Growth Factor Evaluation of patients with suspected POEMS (polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes) syndrome, particularly in differentiatin…
Vaso Intest Polypeptide Useful in Detection of vasoactive intestinal polypeptide producing
tumors in patients with chronic diarrheal diseases.
VIP producing tumors (VIPomas) are rare; most (90%)…
VDRL, CSF Useful For: Aiding in the diagnosis of neurosyphilis.
A positive VDRL on spinal fluid is highly specific for neurosyphilis.
The VDRL on spinal fluid gives a high percenta…
Vedolizumab QN w/Antibodies, S Useful for the assessing the unexpected loss of response to therapy with vedolizumab over time and aid in achieving desired serum levels of vedolizumab.
Venlafaxin, Serum Useful for: Monitoring serum concentration during therapy; Evaluating
potential toxicity; may also be used to evaluate patient compliance.
Venlafaxine is a serotonin and …
VGKC Antibody Detection of antibodies to voltage-gated Potassium Channel (VGKC) using
RIA.
Vibrio Culture, Stool Useful in determining whether a bacterial enteric pathogen is the cause of diarrhea. May be helpful in identifying the source of the infectious agent (eg, dairy products, p…
Vigabatrin (Sabril) Expected serum vigabatrin concentrations in patients receiving
recommended daily dosages: 20-160 ug/ml. Toxic ranges not established.
Viral Culture, Fluid Diagnosing viral infections in body fluids- Pericardial, peritoneal, amniotic. Synovial is NOT accepted source. CSF order MEPAN.
Viscosity, S Viscosity is the property of fluids to resist flow. Hyperviscosity may
be manifested by oronasal bleeding, blurred vision, headaches,
dizziness, nystagmus, deafness, dipl…
Vitamin A Acute ethanol ingestion may result in increased levels of Vit A.
Reference values are established for fasting patient.
Exposure to light and freezing may decrease the levels.
Vitamin B12 Useful in the investigation of macrocytic anemia and work-up of deficiencies seen in megaloblastic anemias. Also used for diagnosis and investigation of some neurological d…
Vitamin C Useful in diagnosing vitamin C deficiency and as an aid to deter
excessive intake. After consuming vitamin C, plasma values rapidly rise within 1-2 hrs and reach peak conc…
VITAMIN D, 1,25-DIHYDROXY Vitamin D originating from dietary and endogenous sources is converted to25-hydroxyvitamin D in the liver, and subsequently to 1-25 Dihydroxy vitamin D in the kidney. Defic…
Vitamin D, 25-Hydroxy Measurement of serum 25-OH vitamin D concentrations provide a good index of circulating vitamin D activity in patients not suffering from renal disease. Lower than normal 2…
Vitamin E Reference values are established for fasting patient.
Useful for evaluation of individuals with motor and sensory
neuropathies; monitoring Vit E status of premature infan…
Vitamin K1 Reference range not established for patients
Volatile screen Detect methanol, ethanol, acetone, or isopropanol in blood.
Volatile Screen Useful For: Detection and quantitation of acetone, methanol, isopropanol and ethanol in whole blood. Quantification of the concentration of ethanol in blood that correlates…
von Willebrand Factor Act Helpful in the initial diagnosis of von Willebrand disease and for monitoring treatment in patients with known disease.
von Willebrand Multimers Useful For: Subtyping of vWD: This test is primarily used to identify
variants of type 2vWD; As an aid determining appropriate treatment.
Von Willebrand Profile Used in detection of deficiency/abnormality of VWF & related deficiency of factor VIII coagulant activity, Subtyping VWD as Type 1 (most common), Type 2 variants (less comm…
Voriconazole, S Trough level (immediately before next dose) is recommended. Voriconazole is an antifungal agent. Monitoring trough levels of is suggested with reduced liver function, with …
VZV Ag Screen Diagnose disease caused by Varicella zoster virus (chicken pox and
shingles).
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