Welcome to your MLT- Professional Name: Email: Phone Number: [A urine sample with a pH of 8.0 and a specific gravity of 1.005 had a small positive blood reaction, but is negative for protein and no RBCs are present in the microscopic examination of urinary sediment. What best explains these findings?] High pH and low SG caused a false-positive blood reaction The blood reaction and protein reaction are discrepant Hemoglobin is present without intact RBCs due to hemolysis An error was made in the microscopic examination None . [A patient’s random urine consistently contains a trace of protein but no casts, cells, or other biochemical abnormality. The first voided morning sample is consistently negative for protein. These findings can be explained by:] Normal diurnal variation in protein loss Early glomerulonephritis Orthostatic or postural albuminuria Microalbuminuria None . [Plate 10 is a photomicrograph of a fungal slide culture stained with lactophenol cotton blue, 400×. Which of the following fungi is present?] M. gypseum M. canis Trichophyton schoenleinii Epidermophyton floccosum None Comment . [A patient with symptoms associated with SLE and scleroderma was evaluated by immunofluorescence microscopy for ANAs using the HEp-2 cell line as substrate. The cell line displayed a mixed pattern of fluorescence that could not be separated by serial dilutions of the serum. Which procedure would be most helpful in determining the antibody profile of this patient?] Use of a different tissue substrate Absorption of the serum using the appropriate tissue extract Ouchterlony technique ELISA tests for specific antibodies None . [Which of the following is one advantage of high-resolution (HR) agarose electrophoresis over lower-current electrophoresis?] High-resolution procedures detect monoclonal and oligoclonal bands at a lower concentration A smaller sample volume is used Results are obtained more rapidly Densitometric scanning of HR gels is more accurate None . [Bernard–Soulier syndrome is associated with:] Decreased bleeding time Decreased factor VIII assay Thrombocytopenia and giant platelets Abnormal platelet aggregation to ADP None . [Which of the following laboratory results is consistent with primary hypoparathyroidism?] Low calcium; high inorganic phosphorus Pi Low calcium; low Pi High calcium; high Pi High calcium; low Pi None . [Which of the following leukemias are included in the 2008 World Health Organization classification of myeloproliferative neoplasms?] Chronic myelogenous leukemia (CML) Chronic neutrophilic leukemia (CNL) Chronic eosinophilic leukemia (CEL) All of these options are classified as myeloproliferative neoplasms (MPN) None . [Which test group best differentiates Acinetobacter baumannii from P. aeruginosa?] Oxidase, motility, NO3 reduction MacConkey growth, 37°C growth, catalase Blood agar growth, oxidase, catalase Oxidase, TSI, MacConkey growth None . [Which serum antibody response usually characterizes the primary (early) stage of syphilis?] Antibodies against syphilis are undetectable Detected 1–3 weeks after appearance of the primary chancre Detected in 50% of cases before the primary chancre disappears Detected within 2 weeks after infection None . [Four units of packed RBCs were brought to the nurses’ station at 10:20 a.m. Two units were transfused immediately, and 1 unit was transfused at 10:40 a.m. The remaining unit was returned to the blood bank at 11:00 a.m. The units were not refrigerated after leaving the blood bank. What problem(s) is (are) present in this situation?] The only problem is with the returned unit; the 30-minute limit has expired and the unit cannot be used The unit should not have been transfused at 10:40 a.m. because the time limit had expired; this unit and the remaining unit should have been returned to the blood bank The returned unit may be held for this patient for 48 hours but cannot be used for another patient No problems; all actions were performed within the allowable time limits None . [An individual’s blood type (A, B, AB, or O) is determined by the presence or absence of which of the following on the red blood cells? ] Antigens Antibodies Chemicals Hormones None . [In which circumstance will the reporting of calculated oxygen saturation of hemoglobin based on PO2, PCO2, pH, temperature, and hemoglobin be in error?] Carbon monoxide poisoning Diabetic ketoacidosis Patient receiving oxygen therapy Assisted ventilation for respiratory failure None . [Bar coding in this area of healthcare is unlikely at the present time.] Bidirectional interfacing Drug administration Labeling and supply inventory Physical location of the patient None . [A 20-year-old horse groomer exhibited a “glanders-like” infection. His history indicated he had suffered several open wounds on his hands 2 weeks before the swelling of his lymph nodes. A gram-negative rod was recovered from a blood culture that grew well on blood and MacConkey agars. Most of the biochemical tests were negative, including the cytochrome oxidase test. What is the most likely identification?] Burkholderia mallei Pseudomonas aeruginosa Pseudomonas stutzeri Burkholderia pseudomallei None . [A patient’s CK-MB is reported as 18 μg/L and the total CK as 560 IU/L. What is the CK relative index (CKI)?] 0.10% 3.2% 10.0% 30.0% None . [Staphylococcus epidermidis (coagulase negative) is recovered from which of the following sources?] Prosthetic heart valves Intravenous catheters Urinary tract All of these options None . [In which of the following conditions will autosplenectomy most likely occur?] Thalassemia major Hgb C disease Hgb SC disease Sickle cell disease None . [Which of the following is a proper way to clean up a small blood spill that has dried on a countertop?] Moisten it with a disinfectant and carefully absorb it with a paper towel. Rub it with an alcohol pad, then wipe the area with a clean alcohol pad. Scrape it into a biohazard bag and wash the surface with soap and water. Use a disinfectant wipe and scrub it in ever increasing concentric circles. None . [Which method is most useful for confirmation that a culture isolate is Group B streptococcus?] Southern blotting Polymerase chain reaction Direct hybridization Probe capture assay None . [Which of the following conditions will cause erroneous Cai results? Assume that the samples are collected and stored anaerobically, kept at 4°C until measurement, and stored for no longer than 1 hour.] Slight hemolysis during venipuncture Assay of whole blood collected in sodium oxalate Analysis of serum in a barrier gel tube stored at 4°C until the clot has formed Analysis of whole blood collected in sodium heparin, 20 U/mL (low-heparin tube) None . [Two consecutive serum samples give the results shown in the table above (at the top of this page) for a metabolic function profile. The instrument is a random access analyzer that uses two sample probes. The first probe aspirates a variable amount of serum for the spectrophotometric chemistry tests, and the second probe makes a 1:50 dilution of serum for electrolyte measurements. What is the most likely cause of these results?] Both patients have renal failure There is an insufficient amount of sample in both serum tubes There is a fibrin strand in the probe used for the spectrophotometric chemistry tests The same patient’s sample was accidentally run twice None . [What influence does the Philadelphia (Ph1) chromosome have on the prognosis of patients with chronic myelocytic leukemia?] It is not predictive The prognosis is better if Ph1 is present The prognosis is worse if Ph1 is present The disease usually transforms into AML when Ph1 is present None . [What is the best course of action given the following test result? (Assume the patient has not been transfused recently.) Anti-A Anti-B A1 cells B cells Mixed field 0 1+ 4+] Nothing, typing is normal Type patient cells with anti-A1 lectin and type serum with A2 cells Retype patient cells; type with anti-H and anti-A,B; use screen cells or A2 cells on patient serum; run patient autocontrol Wash patient cells four times with saline, then repeat the forward type None . [Which of the following blood specimens should be transported in an ice slurry?] BUN and creatinine Cold agglutinin and bilirubin Glucose and electrolytes Homocysteine and rennin None . [Which statement about renal calculi is true?] Calcium oxalate and calcium phosphate account for about three-fourths of all stones Uric acid stones can be seen by x-ray Triple phosphate stones are found principally in the ureters Stones are usually comprised of single salts None . [Calculate the mean cell hemoglobin concentration (MCHC) using the following values:Hgb: 15 g/dL (150 g/L) Hct: 47 mL/dL (0.47)RBC: 4.50 × 10ˆ6/μL (4.50 × 10¹²/L)] 9.5% (.095) 10.4% (.104) 31.9% (.319) 33.3% (.333) None Comment . [Which type of urine sample is needed for a D-xylose absorption test on an adult patient?] 24-hour urine sample collected with 20 mL of 6 N HCl 2-hour timed postprandial urine preserved with boric acid 5-hour timed urine kept under refrigeration Random urine preserved with formalin None . [A gram-positive coccus recovered from a wound ulcer from a 31-year-old diabetic patient showed pale yellow, creamy, β-hemolytic colonies on blood agar. Given the following test results, what is the most likely identification? Catalase = + Glucose OF: positive open tube, negative sealed tube Mannitol salt = Neg Slide coagulase = Neg] Staphylococcus aureus Staphylococcus epidermidis Micrococcus spp. Streptococcus spp. None . [Which test typically requires a refrigerated stool specimen?] Fecal fat Guaiac Occult blood Ova and parasites None . Time's up
