Blood test - wikipedia Blood test For the novel by Jonathan Kellerman, see Blood Test ( novel ). Modern hospital hematology laboratory A blood test is a laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a hypodermic needle, or via fingerprick. Multiple tests for specific blood components, such as a glucose test or a cholesterol test, are often grouped together into one test panel called a blood panel or blood work. Blood tests are often used in health care to determine physiological and biochemical states, such as disease, mineral content, pharmaceutical drug effectiveness, and organ function. Typical clinical blood panels include a basic metabolic panel or a complete blood count. Blood tests are also used in drug tests to detect drug abuse. In some of the United States, a blood test is required before marriage. Contents 1 Extraction 2 Types of tests 2.1 Biochemical analysis 2.1. 1 Normal ranges 2.1. 2 Common abbreviations 2.2 Molecular profiles 2.3 Cellular evaluation 3 Future alternatives 3.1 Saliva tests 3.2 Microemulsion 3.3 SIMBAS 4 See also 5 References Extraction A venipuncture performed using a vacutainer Venipuncture is useful as it is a minimally invasive way to obtain cells and extracellular fluid ( plasma ) from the body for analysis. Blood flows throughout the body, acting as a medium which provides oxygen and nutrients to tissues and carries waste products back to the excretory systems for disposal. Consequently, the state of the bloodstream affects, or is affected by, many medical conditions. For these reasons, blood tests are the most commonly performed medical tests. If only a few drops of blood are needed, a fingerstick is performed instead of drawing blood from a vein. Phlebotomists, laboratory practitioners and nurses are those charged with patient blood extraction. However, in special circumstances, and emergency situations, paramedics and physicians sometimes extract blood. Also, respiratory therapists are trained to extract arterial blood to examine arterial blood gases. Types of tests Vacutainer tubes used in the collection of blood. During venipuncture, pressure differences between the vein and the vacuum in the Vacutainer forces blood into the tube. Biochemical analysis A basic metabolic panel measures sodium, potassium, chloride, bicarbonate, blood urea nitrogen ( BUN ), magnesium, creatinine, glucose, and sometimes calcium. Tests focusing on cholesterol levels can determine LDL and HDL cholesterol levels, as well as triglyceride levels. Some tests, such as those that measure glucose or a lipid profile, require fasting ( or no food consumption ) eight to twelve hours prior to the drawing of the blood sample. For the majority of tests, blood is usually obtained from the patient 's vein. Other specialized tests, such as the arterial blood gas test, require blood extracted from an artery. Blood gas analysis of arterial blood is primarily used to monitor carbon dioxide and oxygen levels related to pulmonary function, but is also used to measure blood pH and bicarbonate levels for certain metabolic conditions. While the regular glucose test is taken at a certain point in time, the glucose tolerance test involves repeated testing to determine the rate at which glucose is processed by the body. Normal ranges Main article : Reference ranges for blood tests Blood tests results should always be interpreted using the ranges provided by the laboratory that performed the test. Example ranges are shown below. Test Low High Unit Comments Sodium ( Na ) 134 145 mmol / L Potassium ( K ) 3.5 5.0 mmol / L Urea 2.5 6.4 mmol / L Blood urea nitrogen Urea 15 40 mg / dL Creatinine - male 62 115 μmol / L Creatinine - female 53 97 μmol / L Creatinine - male 0.7 1.3 mg / dL Creatinine - female 0.6 mg / dL Glucose ( fasting ) 3.9 5.8 mmol / L See also glycated hemoglobin Glucose ( fasting ) 70 120 mg / dL Common abbreviations Upon completion of a blood test analysis, patients may receive a report with blood test abbreviations. Examples of common blood test abbreviations are shown below. Abbreviation Stands for Description HDL High Density Lipoprotein Level of `` good cholesterol '' in the blood ( ratio of HDL : LDL is usually more significant than actual values ) LDL Low Density Lipoprotein Level of `` bad cholesterol '' in the blood ( ratio of HDL : LDL is usually more significant than actual values ) CRP C - Reactive Protein Level of inflammation with the body. If the immune system is fighting an infection or illness, CRP will be higher. CBC ( UK : FBC ) Complete Blood Count ( UK : Full Blood Count ) Analysis of 15 different blood test readings to provide information about overall health. TSH Thyroid - stimulating hormone Thyroid regulates the function of metabolism. Low levels can lead to weight loss, while high levels lead to weight gain. ESR Erythrocyte Sedimentation Rate Indicates the time it takes for red blood cells to move down a tube. This shows signs of inflammation within a body. INR International Normalized Ratio This is a blood clotting test. LFT Liver Function Test This test reveals the levels of waste products, enzymes and proteins that are processed by the liver. U + E Urea and Electrolytes This test is performed to measure the function of kidney. CMP Comprehensive Metabolic Panel This analysis provides an overall picture of the metabolism and chemical balance of the body. WBC White Blood Cell Count The level of white blood cells. RBC Red Blood Cell Count The level of red blood cells. HBC Hemoglobin Level of hemoglobin molecules. HCT Hematocrit Similar to RBC but in percentage. PLT Platelets Platelets levels in the blood. Molecular profiles Protein electrophoresis ( general technique -- not a specific test ) Western blot ( general technique -- not a specific test ) Liver function tests Polymerase chain reaction ( DNA ). DNA profiling is today possible with even very small quantities of blood : this is commonly used in forensic science, but is now also part of the diagnostic process of many disorders. Northern blot ( RNA ) Sexually transmitted diseases Cellular evaluation Full blood count ( or `` complete blood count '' ) Hematocrit MCV ( `` mean corpuscular volume '' ) Mean corpuscular hemoglobin concentration ( MCHC ) Erythrocyte sedimentation rate ( ESR ) Cross-matching. Determination of blood type for blood transfusion or transplants Blood cultures are commonly taken if infection is suspected. Positive cultures and resulting sensitivity results are often useful in guiding medical treatment. Future alternatives Saliva tests In 2008, scientists announced that the more cost effective saliva testing could eventually replace some blood tests, as saliva contains 20 % of the proteins found in blood. Microemulsion In February 2011, Canadian researchers at the University of Calgary 's Schulich School of Engineering announced a microchip for blood tests. Dubbed a microemulsion, a droplet of blood captured inside a layer of another substance. It can control the exact size and spacing of the droplets. The new test could improve the efficiency, accuracy and speed of laboratory tests while also doing it cheaply. The microchip costs $25, whereas the robotic dispensers currently in use cost around $10,000. SIMBAS March 2011 : A team of researchers from UC Berkeley, DCU and University of Valparaíso have developed lab - on - a-chip that can diagnose diseases within 10 minutes without the use of external tubing and extra components. It is called Self - powered Integrated Microfluidic Blood Analysis System ( SIMBAS ). It uses tiny trenches to separate blood cells from plasma ( 99 percent of blood cells were captured during experiments ). Researchers used plastic components, to reduce manufacturing costs. See also Biomarker ( medicine ), a protein or other biomolecule measured in a blood test Blood film, a way to look at blood cells under a microscope Blood lead level Hematology, the study of blood Luminol, a visual test for blood left at crime scenes. Schumm test, a common test for blood mismatch Urinalysis, another common style of body fluid test References Jump up ^ `` Venipuncture - the extraction of blood using a needle and syringe ''. Retrieved June 21, 2012. Jump up ^ MacLennan CA, van Oosterhout JJ, White SA, Drayson MT, Zijlstra EE, Molyneux ME ( July 2007 ). `` Finger - prick blood samples can be used interchangeably with venous samples for CD4 cell counting indicating their potential for use in CD4 rapid tests ''. AIDS ( London, England ). 21 ( 12 ) : 1643 -- 5. doi : 10.1097 / QAD. 0b013e32823bcb03. PMC 2408852. PMID 17630562. Jump up ^ Aaron SD, Vandemheen KL, Naftel SA, Lewis MJ, Rodger MA ( 2003 ). `` Topical tetracaine prior to arterial puncture : a randomized, placebo - controlled clinical trial ''. Respir Med. 97 ( 11 ) : 1195 -- 1199. doi : 10.1016 / S0954 - 6111 ( 03 ) 00226 - 9. PMID 14635973. Jump up ^ `` Michigan careers ''. Michigan.gov. 2010 - 01 - 05. Archived from the original on June 29, 2011. Retrieved 2011 - 08 - 09. Jump up ^ Belargo, Kevin. `` Cholesterol Levels ''. Manic EP. Retrieved 17 January 2012. Jump up ^ `` Fasting blood samples ''. NHS UK. Retrieved June 21, 2012. Jump up ^ `` Blood gases ''. NHS UK. Retrieved June 21, 2012. Jump up ^ `` Glucose tolerance test ''. Medline. Retrieved June 21, 2012. Jump up ^ C.A. Burtis and E.R. Ashwood, Tietz Textbook of Clinical Chemistry ( 1994 ) 2nd edition, ISBN 0 - 7216 - 4472 - 4 Jump up ^ `` Blood tests normal ranges ''. Monthly Prescribing Reference. Retrieved June 21, 2012. Jump up ^ `` Appendix B : Some Common Abbreviations ''. MedlinePlus. U.S. National Library of Medicine. Retrieved 2016 - 04 - 16. Jump up ^ `` Understanding Blood Tests Online ''. Lab Tests Portal. Retrieved 2016 - 04 - 16. Jump up ^ `` Press TV - Saliva test to substitute blood test ''. Presstv.ir. Archived from the original on 2011 - 05 - 21. Retrieved 2011 - 08 - 09. Jump up ^ Denny P, Hagen FK, Hardt M, et al. ( May 2008 ). `` The proteomes of human parotid and submandibular / sublingual gland salivas collected as the ductal secretions ''. J. Proteome Res. 7 ( 5 ) : 1994 -- 2006. doi : 10.1021 / pr700764j. PMC 2839126. PMID 18361515. Jump up ^ `` Microchip offers faster and cheaper way to test blood ''. CTV News. Bell Media. 2 February 2011. Retrieved 2 October 2016. Jump up ^ Taylor, Kate ( 2011 - 03 - 18 ). `` Blood analysis chip detects diseases in minutes ''. Retrieved 2011 - 03 - 26. Jump up ^ Dailey, Jessica ( 2011 - 03 - 22 ). `` New SIMBAS Blood Analysis Biochip Can Diagnose Diseases In Minutes ''. Inhabitat.com. Retrieved 2011 - 03 - 26. Common for blood tests ( CPT 82000 -- 84999 ) Electrolytes Sodium Potassium Chloride Calcium Renal function Creatinine Urea BUN - to - creatinine ratio Plasma osmolality Serum osmolal gap Acid - base Anion gap Arterial blood gas Base excess Bicarbonate CO content Iron tests Ferritin Serum iron Transferrin saturation Total iron - binding capacity Transferrin Transferrin receptor Hormones ACTH stimulation test Thyroid function tests Thyroid - stimulating hormone Metabolism Blood lipids Cardiovascular Cardiac marker Troponin test CPK - MB test Lactate dehydrogenase Myoglobin Glycogen phosphorylase isoenzyme BB Liver function tests Proteins Human serum albumin Serum total protein ALP transaminases ALT AST AST / ALT ratio Bilirubin Unconjugated Conjugated Pancreas Amylase Lipase Pancreatic lipase Myeloid blood tests ( CPT 85002 -- 85999 ) Clotting CBC Platelet count Mean platelet volume vWF : Ristocetin - induced platelet aggregation clotting factors : Prothrombin time Partial thromboplastin time Thrombin time Activated clotting time other / general : coagulation Bleeding time animal enzyme Reptilase time Ecarin clotting time Dilute Russell 's viper venom time Thromboelastography Thrombodynamics test fibrinolysis : Euglobulin lysis time D - dimer Red blood cell indices CBC RBC count Hematocrit Hemoglobin ratios : Mean corpuscular hemoglobin Mean corpuscular hemoglobin concentration Mean corpuscular volume Red blood cell distribution width Fetal hemoglobin : Apt -- Downey test Kleihauer -- Betke test Other Reticulocyte index Haptoglobin Mentzer index CFU - GM Nitro blue tetrazolium chloride test Complete blood count Absolute neutrophil count Other Blood film Blood viscosity Erythrocyte sedimentation rate Medical test : Infectious disease blood tests ( CPT 87001 -- 87999 ) Bacterial infection syphilis VDRL rapid plasma reagin Wassermann test FTA - ABS Rickettsia Weil -- Felix test Helicobacter HelicoCARE direct Streptococcus antistreptolysin O titre Viral infection HIV HIV test BDNA test mChip Epstein -- Barr virus monospot test Dengue fever NS1 antigen test Protozoan infection toxoplasmosis Sabin -- Feldman dye test NDL : 00565676 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Blood_test&oldid=856647560 '' Categories : Blood tests Hidden categories : All articles with unsourced statements Articles with unsourced statements from January 2016 Wikipedia articles with NDL identifiers Talk Contents About Wikipedia Asturianu Български Català Cymraeg Dansk Deutsch Ελληνικά Español Euskara فارسی Français Gaeilge Galego गोंयची कोंकणी / Gõychi Konknni 한국어 हिन्दी Italiano עברית ქართული Nederlands 日本 語 Português Русский සිංහල Simple English Suomi Svenska தமிழ் ไทย Türkçe Українська اردو 中文 25 more Edit links This page was last edited on 26 August 2018, at 18 : 18 ( UTC ). 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Question: medical term for a blood test to measure the levels of oxygen in the blood
Answer: blood gas test