For detailed interpretation of your blood tests, consult with your physician. Ill finish with some practical tips for you to keep in mind, when it comes to blood tests. Normal values symptoms, diagnosis and treatment in the merck manual. A collection of reference ranges for various laboratory investigations, including full blood count, urea and electrolytes, liver function tests and more. The values in between those limits may depend on such factors as age, sex, and specimen type blood, urine, spinal fluid, etc. Pdf normal reference laboratory values researchgate. Functional medicine university initial blood test panel complete blood count with differential comprehensive metabolic panel lipid panel iron. Reference ranges and what they mean lab tests online. Hematologic reference ranges special subjects merck. Laboratory tests reference ranges 1,25dihydroxyvitamin d. You can have a value outside the range and have nothing wrongbut your provider should try to determine the. Laboratory tests reference ranges 1,25dihydroxyvitamin d 1,25dihydroxycholecalciferol, serum see vitamin d metabolites 17hydroxyprogesterone, serum female, follicular. Blood samples for specific ige rast testing for adults a 4 7 ml blood sample is required in a standard tube no anticoagulant. There are two main misconceptions about test results and reference ranges.
The blood specimenprocessing technologist places the specimen on a rocker until the hematology technologist can perform the cbc. Values provided by the reference laboratory should be used. The days of a shotgun approach to ordering laboratory tests has. Some of the reference ranges will be based on those provided in blood chemistry and cbc analysis bcca by dicken weatherby, n. Blood chemistry indicates hydration levels, whether or not an infection is present, and. Reference ranges for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. The test results indicate that your result falls within the normal range.
New rcpch reference ranges 2016 ranges vary between populations and age groups and it is important to always check the reference ranges. If not otherwise specified, a reference range for a blood test is generally the venous range, as the standard process of obtaining a sample is by venipuncture. Interpretation a reference range is usually defined as the set of values 95 percent of the. Specifically, ill cover four panels which are commonly ordered, and then ill list six more blood tests that i find especially useful. When your body is in homeostasis, the values for fluids, chemicals and secretions hormones are within an acceptable or normal range. The normal ranges for blood test results depend on the targets of the test, states university of rochester medical center. Adult hematology and clinical chemistry laboratory reference. Most references values for serum lipids are established on fasting blood samples when used for cardiovascular risk assessment according to. The listed reference ranges should be used when interpreting laboratory values. Clinical examination a comprehensive collection of clinical examination osce guides that include stepbystep images of key steps, video demonstrations and pdf mark schemes. Learn about the test, when you would need one, and what the results can tell you.
Lab daily routine tests lab batches poct point of care testing ref referral to other hospitals including use referral labs reference range note turn around time for tests referred to another hospital is 4 weeks or less unless specifically stated. Reference intervals an overview lab tests online au. The normal adult fasting blood glucose range is about 70 to 105 milligrams per deciliter. Reference ranges establish the normal values for the test and should reflect the medical decision limits for clinicians. A list of reference ranges in pregnancy during pregnancy. Blood urea nitrogen bun, serum or plasma o i mgdl btype natriuretic peptide, plasma. Erythrocytean erythrocyte is a mature red blood cell. Thus, the present study aims to merge the two data sets from denmark. This is for several reasons, including the fact that different laboratories use different kinds of equipment and different kinds of testing methods.
Your blood contains many chemicals, not just red and white blood cells blood chemistry tests are among the most common diagnostic tests performed to detect and diagnose illnesses. Basic laboratory tests complete blood counts cbc test alternative names units usual normal range examples of conditions in which abnormal values occur hemoglobin hb or hgb gdl males. Examples of new national reference ranges current new sodium. Initially, you may use the manufacturers suggested reference range. Racialethnicspecific reference intervals for common. Hematology and clinical chemistry reference ranges lower and upper reference limits. A patients blood test values should be interpreted based on the reference value of the laboratory in which the test was done. Poct point of care testing ref referral to other hospitals including use referral labs reference range note turn around time for tests referred to another hospital is 4 weeks or less unless specifically stated. Pdf comprehensive reference ranges for hematology and. Pdf local reference ranges for full blood count and cd4. A reference range is a set of values that includes upper and lower limits of a lab test based on a group of otherwise healthy people.
Our results showed that the red blood cells count rbc, hemoglobin hb. Always consult with your local laboratory, as ranges often differ between labs. Reference ranges and what they mean private md labs. For example, your results for a thyroidstimulating hormone tsh test might look something like. Lab tests, along with a health history and physical exam, are used to diagnose and manage health conditions. Determination af grey amazon caique cockatiel cockatoo conure eclectus alk phos ul 20160 15150 20250 15255 80250 150350.
The ddimer test is a quick way to check if you might have a serious blood clot. Ranges in each laboratory depend on the local population, test methodology and. Abnormal results are not considered critical values. That means they have to establish their own ranges, and will provide your test result with an accompanying reference range appropriate to the laboratory. Definitions normal reference ranges refer to the laboratory values that are generally associated with absence of disease. For other tests, please consult the reference ranges provided with all reports. Adult post pubescent question range paediatric age if applicable range do not put reference range in haematology haemoglobin1 male 175 gl 0 6 days 145 220 gl. A blood test result that lies outside a reference range does not necessary mean that there is a disease process requiring treatment. Local reference ranges for full blood count and cd4 lymphocyte count testing article pdf available in south african medical journal suidafrikaanse tydskrif vir geneeskunde 994. Even in the same laboratory, ranges may change from time to time as new methods are introduced. How are patient merge transactions handled eg, trauma patients. Skirting the pitfalls of merging lab results cap today. Reference values vary based on several factors, including the specific laboratory that supplies them.
In most instances the new reference ranges only differ slightly from our current reference ranges. Why do blood test results and reference ranges vary. Because most blood test reference ranges often referred to as normal ranges of blood test results are typically defined as the range of values of the median 95% of the healthy population, it is unlikely that a given blood sample, even from a healthy patient, will show normal values for every blood test taken. Reference ranges and what they mean the normal or reference range in reference to a lab test, what does out of the normal range actually mean.
Although you could argue that these blood tests, etc. Haematology laboratory handbook oxford university hospitals. In other words, were going to cover my top ten blood tests for the healthcare of aging adults. The following blood test reference range chart is presented in the american metric format exceptions as noted. Blood test results with normal range reference chart. Your doctor may order a cbc as part of a routine checkup or to. Blood test reference range chart test reference range conventional units 17 hydroxy. Normal reference ranges and laboratory values in pregnancy. Below is a selection of reference ranges for various haematological and biochemical investigations. Verifying a reference range is different than establishing a reference range.
The brief answer is that a result out of the normal range signals the need for further investigation or at least further explanation. The reference range values for hemoglobin, hematocrit, and red blood cells are comparable to those established by the international aids. An abnormal test result is a sign of a real problem. A typical lab report will provide your results followed by a reference range. For paediatric normal ranges please contact laboratory. Anatomical pathology blood tests clinical chemistry blood. Reference intervals for blood chemistry laboratory tests are those corresponding to the age group of 1965. Management of laboratory data and information exchange in the. Learn how reference range is determined for laboratory tests. For an fda approved test method, the clinical laboratory can adopt the manufacturers stated reference range if its patient population gives similar results to those published in the manufacturers package insert.
Unnecessary referrals generated from misinterpretation of lab values, often for labs that normally have gender andor agespecific ranges. In this handbook you are provided with common reference ranges. Different laboratories use different kinds of equipment and different kinds of testing methods. For most tests, the reference ranges are specific to the laboratory that produces the test results. Interpretation of laboratory test results with appropriate. For our text we will reserve diagnostic tests for those more sophisticated tests and procedures. Hematological and clinical chemistry reference ranges. When your body is healthy it functions normally in a state of homeostasis or equilibrium. Demographic and laboratory data were merged and analyzed in stata. Each unique istat system cartridge contains chemically sensitive biosensors on a silicon chip that are. Kit reference range obtained from manufacturers instructions for use. To address whether these shifts in normal range were statistically significant, quantile regressions were conducted using raceethnicity and sex as independent variables table 3. Reference ranges for blood tests are studied within the field of clinical chemistry also known as clinical biochemistry, chemical pathology or pure blood chemistry, the area of pathology that is generally concerned with analysis of bodily fluids.
A complete blood count cbc is a test that counts the cells that make up your blood. Pediatric reference intervals for general clinical. In addition, it is important to remember that reference intervals for an. Haematology reference ranges fbc age range 01 days test criteria low reference high reference units white blood cell count 10 26 x 109l red blood cell count male 5 7 x 1012l female 5 7 x 1012l haemoglobin male 140 220 gl female 140 220 gl unknown 140 220. A test result outside the reference range may or may not indicate a problem, but it signals your healthcare provider to further investigate your condition. With children, consider that 1 ml blood will allow you to test for a. Labguide how to verify performance specifications.