Find out how health professionals use shorthand for labs and the meaning of normal ranges. Of the analytes measured by the nhanes 20012002 lipid laboratory, the only one for which such a panic value must be considered is triglyceride. The following chart gives the normal values for each type of wbc. The provision of safe, efficient and competent care was the catalyst to offer a quick resource tool that would assist nurses in. A value or set of values used to interpret a laboratory result the reference values can be a single cutoff, a set. Introduction a variety of laboratory tests are done in the neonatal period on a routine basis, many as pointofcare testing. To assist nurses, here are the common laboratory values listed in an organized and easytounderstand table. Academy of acute care physical therapy apta task force.
Urine should be sterile no normal flora few, if any, cells should be found significant bacteriuria is defined by an initial positive dipstick for leukocyte esterase or. Critical results are communicated to the physician, the physicians representative, the ordering entity, or other clinical personnel responsible for patient care once the result has been verified and the patients result has been entered into the laboratory computer system. When your body is in homeostasis, the values for fluids, chemicals and secretions hormones are within an acceptable or normal range. Laboratory tests on the blood are vital tools that help detect. Blood, plasma, and serum reference values vary based on several factors, including the specific laboratory that supplies them. Lundberg 1972 defined a critical value as a physiological state at such variance with normal as to be life threatening unless something is done promptly and for which some corrective action can be taken. Laboratory tests reference ranges 1,25dihydroxyvitamin d 1,25dihydroxycholecalciferol, serum see vitamin d metabolites 17hydroxyprogesterone, serum female, follicular. Common laboratory values laboratory tests are an integral part of every day practice within health care. Normal haematological values for various species of farm animals. Compare your results to the range shown on your lab report. Interpretation of the results of the differential must always be done with the total number of wbcs in mind. Rishi is a pediatric infectious disease physician and works at khan academy. Each commercial laboratory has its own set of normal values, called normal range or reference range on your lab report. In cases of suspected acute pancreatic disease, measurement of serum or urine aml is the most important laboratory test.
Laboratory values of clinical importance medical notebook. Nurses are often tasked of patient preparation and specimen collection during these diagnostic procedures. Lowdensity lipoprotein ldl less than or equal to mgdl 3. When your body is healthy it functions normally in a state of homeostasis or equilibrium. Laboratory values use this handy cheatsheet to help you monitor laboratory values related to fluid and electrolyte status. Knowing the different normal lab values is an important step in making an informed clinical decision as a nurse. In healthy patients, the majority of molecular oxygen o2 is bound to hemoglobin and only a small fraction is dissolved in blood. Haematological parameters and factors affecting their values. Low density lipoprotein ldl less than or equal to mgdl 3. A patients blood test values should be interpreted based on the reference value of the laboratory in which the test was done. Learning objectives after successful completion of this course, you will be able to.
There are more than 20 different lab methods for determining the results of this test. Lab tests are used to help confirm a diagnosis, monitor an illness. Laboratory values see inside back cover for continuation. Thus, any given result should be interpreted based on the reference value of the laboratory in which the test was done. Occasionally, a specimen may have a value considered to be a critical, or panic value. I hope we can someday look back to say how absurd it was for community pharmacists to assess the appropriateness and safety of a medication without patient laboratory values. Normal laboratory values msd manual professional edition. Academy of acute care physical therapy apta task force on lab values. This book should be of help to nursing in understanding some of the more common tests which are conducted.
Comparing the clients laboratory values to normal laboratory values. Pdf interpreting laboratory values in older adults. The lab values course will help you understand how to interpret some of the most common and most important laboratory values you might see in your patients. Hematocrit values indicate the thickness of the blood as well as its ability to carry oxygen. Describe how creatinine clearance values in combination with bun and creatinine outline the.
Remember, normal values may vary according to techniques used in different laboratories. Define the difference between the two key lab values related to renal function 4. Evolution of the 2017 edition of the laboratory values interpretation. An interpretation of the results will depend on the glucose result and the clinical details provided. Laboratory test that counts actual numbers of different types of wbcs. These studies include further measurements of cell size and cell distribution, biochemical investigation, or any other test that helps diagnose the abnormality.
Introduction to lab values and normal ranges health. Define the normal ranges for the key chemistry values described in this course. The clients current laboratory values are compared to the normal laboratory values, as above, in order to determine the physiological status of the client and to compare the current values during treatment to the laboratory values taken prior to a treatment. Well break them down by body system and help you understand how the numbers you see in the chart relate to whats actually happening to your patient.
It is of utmost importance that nurses are knowledgeable about the different procedures and their values and results to make informed clinical decisions. This table lists reference values for the most common laboratory tests and is intended for interpretation of the results as they are provided in the examination. The diagnostic values depend on the duration of illness hasse melbye, bjbrn straume and jan brox2 institute of community medicine, zdepartment of clinical chemirtry, hospital of hammerfest, university troms, 9ooo troms0, norway. Reports and experiences show that pharmacist access to laboratory values improves patient care, while new physicians and patients are open to the sharing of this information. Thyroid function tests normal ranges vary thyroid iodine 1i uptake 10% to 30% of administered dose. The threshold or limiting values for the reference interval are usually the 0. Results that are out of range may not represent a problem. The reference interval for many laboratory tests is defined by threshold values between which the test results of a specified percentage usually 95% of apparently healthy individuals would fall. Diagnostic and laboratory tests are tools that provide invaluable insights and information about the patient. Reference values for laboratory tests normal reference laboratory values nejm clinical lab reference range guide mgh laboratory test reference ranges normal laboratory values haematology reference values clinical laboratory tests normal values laboratory. Defining laboratory reference values and decision limits. Lab test are integral to patient care and depend on cooperation and support of ward staff for accurate and timely interpretation of the results. Normal values range in men from 4054% and in women 3747%.
Lab tests, along with a health history and physical exam, are used to diagnose and manage health conditions. The normal ranges in each laboratory depend on the local population, test methodology and conditions of assay, units, and a variety of additional. Harrisons principles of internal medicine 18th edition. Name one reason for an increase or decrease in the key chemistries. Lab values and their meanings acknowledgement the lpn lab values manual was first compiled in response to a lack of information in the form of a quick reference manual for licensed practical nurses in 2008. Lab values and their meanings forward the laboratory services are very pleased to see this report. Normal laboratory values aids information, education.
Clinicians frequently order coagulation tests, such as the prothrombin time pt, activated partial thromboplastin time aptt, and thrombin time tt, to assess blood clotting function in patients. Identify normal chemistry values for the adult patient define the normal range of laboratory values for components of a complete blood count for the adult patient. Laboratory tests for pneumonia in general practice. Appendix b selected normal pediatric laboratory values 1449 growth hormone s2 after infancy fasting specimen. Consequently, laboratory measurements of blood coagulation represent only a close approximation of the bodys hemostatic system.
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