Diagnostics & Imaging

A:

The life expectancy for humans in the United States in 2014 is 77.5 years from birth. However, as people age they have an increased expectancy. This is due to the fact they have survived numerous potential causes of death.

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  • Which presumed functions did phrenology highlight?

    Q: Which presumed functions did phrenology highlight?

    A: During the 19th and 20th centuries, phrenology was used to determine mental functions and character traits of individuals. Though the practice was thoroughly debunked, for a period, the study of the skull's bumps and contours was widely used in a number of fields, including education, medicine, psychiatry and criminology. Phrenology affected many social issues, such as marriage and the treatment of native populations.
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  • What does a CT scan show?

    Q: What does a CT scan show?

    A: According to Johns Hopkins Medicine, a CT scan shows body parts such as organs, bones, fat and muscle in greater detail than a usual X-ray can provide. A CT scan does use X-rays, but the beam circles the area to be scanned and allows for more views and angles.
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  • Why should you fast before blood tests?

    Q: Why should you fast before blood tests?

    A: Fasting for a certain length of time before a blood test is one way of ensuring that your test results are not contaminated by the food you've eaten. The Mayo Clinic notes that fasting may not be necessary to get an accurate reading on a cholesterol test, but most doctors will still ask that you fast for at least 12 hours before your appointment.
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  • What is dangerous about radio waves?

    Q: What is dangerous about radio waves?

    A: When radio waves pass through the human body at extremely high doses, they can break down tissue and damage DNA structure. Radio waves have been linked to headaches, multiple sclerosis and sleep disorders and may contribute to more serious illnesses like cancer and brain tumors. However, some argue that the only scientifically proven negative side effect of radio waves is a rise in temperature in the substance through which the waves pass, and the debate is fierce as to the true effects of radio waves in humans.
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  • What is the difference between aseptic and sterile?

    Q: What is the difference between aseptic and sterile?

    A: According to the Wound, Ostomy and Continence Nurses Society, sterile is the absence of and continued protection against all microorganisms, while aseptic refers to protections against pathogenic microorganisms. These two techniques, while similar in purpose, differ in severity and diligence. Sterile is the more thorough of the two types.
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  • How long do you leave a thermometer in your mouth?

    Q: How long do you leave a thermometer in your mouth?

    A: To obtain an accurate temperature reading, a glass thermometer must remain in the mouth for three minutes, while a digital thermometer remains in the mouth until it beeps or the temperature reading appears in the window, according to Drugs.com. The tip of the thermometer must be placed under the tongue.
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  • What is a bone scan?

    Q: What is a bone scan?

    A: Mayo Clinic defines a bone scan as a nuclear imaging test that is used to diagnose and monitor multiple types of bone disease. Doctors typically order bone scans if a patient has a bone injury or abnormality that can't be detected on a standard X-ray. The scans can also be used to determine if cancer that started in a different part of the body has spread to the bones.
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  • How does the life support machine work?

    Q: How does the life support machine work?

    A: According to the Intensive Care Coordination and Monitoring Unit of New South Wales, ventilators, also called life support machines or breathing machines, work by supporting patients to breathe or by completely taking over the function of breathing for patients. A breathing tube inserted into the patient’s windpipe connects the ventilator to the patient.
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  • How can you check your blood pressure at home?

    Q: How can you check your blood pressure at home?

    A: To check blood pressure at home, roll up one sleeve, sit down for a few minutes and place the cuff of a heart monitor around the upper arm. Inflate the cuff until it reads 30 points above the expected systolic pressure and look at the pressure reading on the screen or dial. It is a good idea to take multiple readings and record each reading with the time and date, according to the American Heart Association.
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  • What do blood tests show?

    Q: What do blood tests show?

    A: The most common blood test, the complete blood count, or CBC, measures red blood cells, white blood cells, hemoglobin, hematocrit, platelets and mean corpuscular volume of the blood, according to the National Heart, Lung and Blood Institute. This test is often used to check symptoms and diagnose a wide variety of conditions, such as anemia, infections, blood cancers, clotting problems and immune system disorders.
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  • How does a CAT scan machine work?

    Q: How does a CAT scan machine work?

    A: According to the FDA, CAT scans rotate an x-ray source mounted opposite a detector around a patient, producing a thin, fan-shaped beam of x-rays that pass through patients' bodies one small section at a time. The detectors register the x-rays as they pass through a patient's body and transmit them to a computer that reconstructs them into one or multiple cross-sectional images of the internal organs and tissues.
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  • What is a spirometry test?

    Q: What is a spirometry test?

    A: A spirometry test measures lung function. A patient takes a deep breath and blows into a tube as hard as possible, explains Mayo Clinic. The test is repeated at least three times for consistency, and the highest result of the three consistent trials is used as the final result.
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  • What is the purpose of an MRI?

    Q: What is the purpose of an MRI?

    A: The Encyclopedia of Children’s Health states that the purpose of an MRI, which stands for magnetic resonance imaging, is to generate images of the body to assist doctors in diagnosing diseases or conditions and evaluating injuries. Additionally, the National Health Service explains that the results of an MRI scan are useful in planning treatments and assessing the effectiveness of a previous treatment.
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  • How long does staph live on surfaces?

    Q: How long does staph live on surfaces?

    A: The Fairfield Department of Health reports that staph bacteria can live on an object for up to 24 hours, making it important to wash commonly shared objects and surfaces regularly, especially when a known staph infection is present. Because many people carry staph bacteria, it is impossible to rid all instances of the bacteria. However, the Fairfield Department of Health advises that good hygiene can prevent the spread of the infection to others.
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  • What is a stereoscope used for?

    Q: What is a stereoscope used for?

    A: A stereoscope is a tool used for viewing images three-dimensionally. It has two removable eyepieces so that both eyes can be used to view an object at the same time. A stereoscope is used in various fields, such as police work, education, archeology, biology, government services, health and medical research.
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  • What is an annual physical exam?

    Q: What is an annual physical exam?

    A: According to WebMD, an annual physical exam does not have a set structure and is simply a yearly physical exam that a person undertakes to check on her health. It is also a good way to ensure early detection of any unnoticed health problems.
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  • How long do most people live?

    Q: How long do most people live?

    A: The life expectancy for humans in the United States in 2014 is 77.5 years from birth. However, as people age they have an increased expectancy. This is due to the fact they have survived numerous potential causes of death.
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  • Q: What tests can be run to find cause of numbness in left hand?

    A: Tests that can be run to determine the cause of numbness in the left hand include electrical and blood tests, X-rays, and scans, claims Hand to Elbow. Patients should state symptoms and be assessed prior to these tests.
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  • Q: Where can you find blood glucose test strips for diabetes?

    A: Blood glucose strips for diabetes are available at local and online pharmacies, according to WebMD. Medicare beneficiaries may use the Medicare National Mail-Order Program to have blood glucose strips for diabetes delivered to their homes or to a local participating store for pickup, notes the American Diabetes Association.
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  • Q: Is self-administered INR blood testing recommended?

    A: Physicians recommend self-administered International Normalized Ratio blood testing because it is convenient, gives patients a sense of security, and empowers them to take an active role in their medical care, according to the National Blood Clot Alliance. Individuals who self-test have slightly less clotting and bleeding complications than those who test at physicians' offices, and they often achieve the target INR range.
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  • Q: How do you interpret some common blood test categories?

    A: Common blood test categories are interpreted according to whether they are higher or lower than a normal range. The four most common tests are the complete blood count, blood chemistry tests, blood enzyme tests and blood tests for heart disease risk, as the National Heart, Lung, and Blood Institute indicates.
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