INCOMPLETE Body Fluid Analysis Practice Questions

MLS 4510

If CSF tubes numbered 2 and 3 CANNOT be analyzed within 1 hour, the correct procedure would be to:

Refrigerate tube 3 and leave 2 at room temperature

Calculate the WBC count using a 1:10 dilution, 64 cells are counted in five large squares on both sides of the hemocytometer.

640 cells/µL

On a xanthochromic CSF specimen, which of the following test should not be performed?

Lactate level

A positive cryptococcal antigen test with a negative India ink preparation may indicate:

Rheumatoid factor

Myelin basic protein is measured in the CSF to assess the condition of patients with which of the following?

Multiple sclerosis

Three tubes of CSF are sent to the laboratory and show blood in all tubes, but decreasing in amounts from 1 to 3. How should this observation be interpreted?

A traumatic or bloody tap is suspected, and in all likelihood, no pathogenic significance should be attached to the presence of blood

The average volume of CSF in an adult is…

90–150 mL

CSF electrophoresis can be used to confirm the diagnosis of multiple sclerosis and would be expected to show which of the following?

Increased IgG with oligoclonal bands not seen on serum electrophoresis

Using the following laboratory results, determine what type of meningitis is present

WBC count: 1000/µL

Lymphocyte: 10%

Neutrophils: 90%

Protein: 150 mg/dL

Glucose: 15 mg/dL

Blood glucose: 90 mg/dL

Lactate: 40 mg/dL

Bacterial

Which condition does NOT produce elevated CSF protein?

Fluid leakage

To determine whether IgG is being produced within the central nervous system, the laboratory must calculate the:

IgG index

Examination of a CSF shows 1,000 WBCs, of which 75% are lymphocytes and 25% are monocytes. This finding is consistent with:

Viral meningitis

Which is NOT a function of the cerebrospinal fluid (CSF)?

Transmission of neurological impulses

A xanthochromic CSF specimen will appear:

Yellow and clear

The CSF circulates through the brain and spinal cord in the:

Subarachnoid space

Another name for a peritoneal effusion is:

Ascites

A pleural fluid pH of 6.0 indicates:

Esophageal rupture

Which of the following best represents a hemothorax?

Blood Hct: 30, fluid Hct: 20

Which of the following causes is not associated with transudate?

Increased hydrostatic pressure

Which of the following causes is not associated with exudate?

Congestive heart failure

During normal production of serous fluid, the slight excess of fluid is:

Absorbed by the lymphatic system

An increase in the amount of serous fluid is called a/an:

Effusion

The membrane that lines the wall of a cavity is the:

Parietal

All of the following are characteristics of mesothelial cells except:

Absence of nucleoli

Differentiation between bacterial peritonitis and cirrhosis is done by performing a/an:

Absolute neutrophil count

Why are fluid:serum protein and lactic dehydrogenase ratios performed on serous fluids?

To classify transudates and exudates

When diluting a synovial fluid WBC count, all of the following are acceptable EXCEPT:

Acetic acid

All of the following are abnormal when seen in synovial fluid EXCEPT:

Synovial lining cells

The procedure for collecting synovial fluid is called:

Arthrocentesis

Which synovial crystal appears due to purine metabolism or leukemia chemotherapy?

Monosodium urate

Synovial fluid for crystal examination should be examined as a/an:

Wet preparation

In what condition is the synovial fluid glucose most likely to be within normal limits?

Hemorrhagic arthritis

The primary function of synoviocytes is to:

Provide nutrients for the joint

The highest synovial WBC count should be found in a patient suffering from which of the following kinds of arthritis?

Septic

The chemical test performed most frequently on synovial fluid is:

Glucose

In an examination of synovial fluid under compensated polarized light, rhomboid-shaped crystals are observed. What color would these crystals be when aligned parallel to the slow vibration?

Blue