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CASE STUDY 12-2 A 3-year-old girl was admitted with a diagnosis of acute lymphocytic leukemia. Her admitting labora- tory data are shown in Case Study Table 12-2.1. After admission, she was treated by administration of packed red cells, 2 units of platelets, IV fluids, and allopurinol. On the second hospital day, chemother- apy was begun, using IV vincristine and prednisone and intrathecal injections of methotrexate, predni- sone, and cytosine arabinoside. She was discharged for home care 5 days later. She was continued on prednisone and allopurinol at home. She received additional chemotherapy 1 month later (11/1) and again on 11/14. On 12/6, she was readmitted because she had painful sores in her mouth and was unable to eat. Questions 1. How would you explain the significant elevations of uric acid on admission? 2. Which two factors are responsible for the normal concentrations of uric acid seen in subsequent admissions? 3. Which is the most likely cause of the abnormally low concentration of urea nitrogen observed on 12/6? Which other laboratory test would confirm your suspicions? CASE STUDY TABLE 12-2.1 LABORATORY RESULTS 10/1 10/2 10/3 10/4 11/14 12/6 6/20 Urea N (mg/dL) 12.0 15 4.0 2.0 Creatinine (mg/dL) 0.7 1.0 0.7 0.7 Uric acid (mg/dL) 12.0 9.2 4.0 1.9 2.3 3.1 WBC (mm³) 56,300 • • 3,700 2,800 3,700 "Indicates test not performed.

CASE STUDY 12-2 A 3-year-old girl was admitted with a diagnosis of acute lymphocytic leukemia. Her admitting labora- tory data are shown in Case Study Table 12-2.1. After admission, she was treated by administration of packed red cells, 2 units of platelets, IV fluids, and allopurinol. On the second hospital day, chemother- apy was begun, using IV vincristine and prednisone and intrathecal injections of methotrexate, predni- sone, and cytosine arabinoside. She was discharged for home care 5 days later. She was continued on prednisone and allopurinol at home. She received additional chemotherapy 1 month later (11/1) and again on 11/14. On 12/6, she was readmitted because she had painful sores in her mouth and was unable to eat. Questions 1. How would you explain the significant elevations of uric acid on admission? 2. Which two factors are responsible for the normal concentrations of uric acid seen in subsequent admissions? 3. Which is the most likely cause of the abnormally low concentration of urea nitrogen observed on 12/6? Which other laboratory test would confirm your suspicions? CASE STUDY TABLE 12-2.1 LABORATORY RESULTS 10/1 10/2 10/3 10/4 11/14 12/6 6/20 Urea N (mg/dL) 12.0 15 4.0 2.0 Creatinine (mg/dL) 0.7 1.0 0.7 0.7 Uric acid (mg/dL) 12.0 9.2 4.0 1.9 2.3 3.1 WBC (mm³) 56,300 • • 3,700 2,800 3,700 "Indicates test not performed.

Phlebotomy Essentials
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
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CASE STUDY 12-2 A 3-year-old girl was admitted with a diagnosis of acute lymphocytic leukemia. Her admitting labora- tory data are shown in Case Study Table 12-2.1. After admission, she was treated by administration of packed red cells, 2 units of platelets, IV fluids, and allopurinol. On the second hospital day, chemother- apy was begun, using IV vincristine and prednisone and intrathecal injections of methotrexate, predni- sone, and cytosine arabinoside. She was discharged for home care 5 days later. She was continued on prednisone and allopurinol at home. She received additional chemotherapy 1 month later (11/1) and again on 11/14. On 12/6, she was readmitted because she had painful sores in her mouth and was unable to eat. Questions 1. How would you explain the significant elevations of uric acid on admission? 2. Which two factors are responsible for the normal concentrations of uric acid seen in subsequent admissions? 3. Which is the most likely cause of the abnormally low concentration of urea nitrogen observed on 12/6? Which other laboratory test would confirm your suspicions? CASE STUDY TABLE 12-2.1 LABORATORY RESULTS 10/1 10/2 10/3 10/4 11/14 12/6 6/20 Urea N (mg/dL) 12.0 15 4.0 2.0 Creatinine (mg/dL) 0.7 a 1.0 0.7 a 0.7 Uric acid (mg/dL) 12.0 9.2 4.0 1.9 2.3 3.1 WBC (mm³) 56,300 a 3,700 2,800 3,700 "Indicates test not performed.
Transcribed Image Text:CASE STUDY 12-2 A 3-year-old girl was admitted with a diagnosis of acute lymphocytic leukemia. Her admitting labora- tory data are shown in Case Study Table 12-2.1. After admission, she was treated by administration of packed red cells, 2 units of platelets, IV fluids, and allopurinol. On the second hospital day, chemother- apy was begun, using IV vincristine and prednisone and intrathecal injections of methotrexate, predni- sone, and cytosine arabinoside. She was discharged for home care 5 days later. She was continued on prednisone and allopurinol at home. She received additional chemotherapy 1 month later (11/1) and again on 11/14. On 12/6, she was readmitted because she had painful sores in her mouth and was unable to eat. Questions 1. How would you explain the significant elevations of uric acid on admission? 2. Which two factors are responsible for the normal concentrations of uric acid seen in subsequent admissions? 3. Which is the most likely cause of the abnormally low concentration of urea nitrogen observed on 12/6? Which other laboratory test would confirm your suspicions? CASE STUDY TABLE 12-2.1 LABORATORY RESULTS 10/1 10/2 10/3 10/4 11/14 12/6 6/20 Urea N (mg/dL) 12.0 15 4.0 2.0 Creatinine (mg/dL) 0.7 a 1.0 0.7 a 0.7 Uric acid (mg/dL) 12.0 9.2 4.0 1.9 2.3 3.1 WBC (mm³) 56,300 a 3,700 2,800 3,700 "Indicates test not performed.
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