Harrisons Manual of Medicine, 18th Ed.

CHAPTER 220. Laboratory Values of Clinical Importance

INTRODUCTORY COMMENTS

In preparing for the Appendix, the authors have taken into account the fact that the system of international units (SI, système international d’unités) is used in most countries and in some medical journals. However, clinical laboratories may continue to report values in “conventional” units. Therefore, both systems are provided in the Appendix.

For many analytes, the reference ranges given here are meant as general guidelines rather than absolute normative ranges. Because of differences in methodology, assay reagents, and collection methods, reference values may differ among clinical laboratories. Therefore, for diagnostic pt management purposes, reference ranges provided by the laboratory performing the test should be used for interpretation of a given result.

REFERENCE VALUES FOR LABORATORY TESTS

(Tables 220-1 through 220-5)

TABLE 220-1 HEMATOLOGY AND COAGULATION

TABLE 220-2 CLINICAL CHEMISTRY AND IMMUNOLOGY

TABLE 220-3 TOXICOLOGY AND THERAPEUTIC DRUG MONITORING

TABLE 220-4 VITAMINS AND SELECTED TRACE MINERALS

TABLE 220-5 CLASSIFICATION OF LDL, TOTAL, AND HDL CHOLESTEROL

REFERENCE VALUES FOR SPECIFIC ANALYTES

(Tables 220-6 through 220-9)

TABLE 220-66 CEREBROSPINAL FLUID^a

TABLE 220-7 URINE ANALYSIS AND RENAL FUNCTION TESTS

TABLE 220-8A DIFFERENTIAL NUCLEATED CELL COUNTS OF BONE MARROW ASPIRATES^a (SEE HPIM-18 CHAPS. 57, E17)

TABLE 220-8B BONE MARROW CELLULARITY

TABLE 220-9 STOOL ANALYSIS

SPECIAL FUNCTION TESTS (TABLES 220-10 THROUGH 220-14)

TABLE 220-10 URINE ANALYSIS AND RENAL FUNCTION TESTS

TABLE 220-11 CIRCULATORY FUNCTION TESTS

TABLE 220-12 GASTROINTESTINAL TESTS

TABLE 220-13 NORMAL ECHOCARDIOGRAPHIC REFERENCE LIMITS AND PARTITION VALUES IN ADULTS

TABLE 220-14 SUMMARY OF VALUES USEFUL IN PULMONARY PHYSIOLOGY

MISCELLANEOUS (TABLE 220-15)

TABLE 220-15 BODY FLUIDS AND OTHER MASS DATA