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The original source of carcinosin preparation is not known but some authors suggests, it was a preparation from carcinoma of the breast,
The original source of carcinosin preparation is not known but some authors suggests, it was a preparation from carcinoma of the breast,
See lessThere are two kinds of tests used to detect TB bacteria in the body: 1. The TB skin test (TST). 2. The TB blood tests. (A positive TB skin test or TB blood test only tells that a person has been infected with TB bacteria. It does not tell whether the person has latent TB infection (LTBI) or has progRead more
There are two kinds of tests used to detect TB bacteria in the body:
1. The TB skin test (TST).
2. The TB blood tests.
(A positive TB skin test or TB blood test only tells that a person has been infected with TB bacteria. It does not tell whether the person has latent TB infection (LTBI) or has progressed to TB disease.)
3. Chest x-ray.
4. Sample of sputum, are needed to see whether the person has TB disease.
Take a small sample of skin (biopsy) for examination under a microscope. This helps determine the type of psoriasis and rule out other disorders.
Take a small sample of skin (biopsy) for examination under a microscope. This helps determine the type of psoriasis and rule out other disorders.
See less1. Hemiplegia is often diagnosed after reviewing the individual’s past medical history and performing a detailed neurological examination assessing sensory and motor functions. 2. Blood tests, including a complete blood count (CBC), erythrocyte sedimentation rate (ESR), coagulation tests (e.g., PT,Read more
1. Hemiplegia is often diagnosed after reviewing the individual’s past medical history and performing a detailed neurological examination assessing sensory and motor functions.
2. Blood tests, including a complete blood count (CBC), erythrocyte sedimentation rate (ESR), coagulation tests (e.g., PT, aPTT) can help eliminate various underlying causes, such as infections or malignancies.
3. Magnetic resonance imaging (MRI) and computerized tomography (CT) scans of the head, are necessary in order to exclude most pathologies, including strokes, aneurysms, brain tumors, multiple sclerosis, and injuries.
4. Electroencephalography (EEG), which measures the electrical activity of the brain, can be used for diagnostic purposes (e.g., reveal the part(s) of the brain from which seizures originate).
See lessThe diagnosis of tetanus is clinical and does not require a demonstration of C. tetani. Treatment should be started immediately based on clinical diagnosis. Laboratory diagnosis provides supportive evidence for confirmation. Specimen Excised tissue bits from the necrotic depths of wounds are more reRead more
The diagnosis of tetanus is clinical and does not require a demonstration of C. tetani. Treatment should be started immediately based on clinical diagnosis. Laboratory diagnosis provides supportive evidence for confirmation.
Specimen
Excised tissue bits from the necrotic depths of wounds are more reliable than wound swabs.
Gram staining
Gram staining reveals gram-positive bacilli with terminal and round spores (drum stick appearance or tennis racket appearance). However, microscopy alone is unreliable as it cannot distinguish C. tetani from morphologically similar non-pathogenic clostridia like C. tetanomorphum and C. sphenoides.
Culture
Culture is more reliable than microscopy.
• Robertson cooked meat(RCM) broth – C. tetani being proteolytic turns the meat particles black and produces a foul odor.
• Blood agar with polymyxin B: C. tetani produce characteristic swarming growth when incubated at 37°C for 24-48 hours under anaerobic conditions.
Toxigenicity Test
As pathogenesis of tetanus is toxin mediated, the association of the isolated organism can only be established when its toxin production is demonstrated. Toxigenicity can be detected by both in vitro and in vivo methods.
• In vitro hemolysis inhibition test: C. tetani produces hemolysis on blood agar which is inhibited by adding antitoxin. This test indicates the production of tetanolysin only but not tetanospasmin.
• In vivo mouse inoculation test: RCM broth with black turbid growth is injected into the root of the tail of a test mouse. The test animal develops stiffness which begins with the tail and progresses to involve the hind limbs on the inoculated side- the other limb-trunk-forelimbs. Death occurs within two days. This test indicates the production of tetanospasmin.
See less1.Skin culture to test for the presence of Clostridium perfringens and other bacteria. 2.Blood tests to check for an abnormally high white blood cell count, which can indicate an infection. 3.Imaging tests, such as an routine X-ray, to visualize tissues and check for the presence of gas or special sRead more
1.Skin culture to test for the presence of Clostridium perfringens and other bacteria.
2.Blood tests to check for an abnormally high white blood cell count, which can indicate an infection.
3.Imaging tests, such as an routine X-ray, to visualize tissues and check for the presence of gas or special studies such as magnetic resonance imaging (MRI) or arteriogram.
4.Surgery to evaluate the spread of gas gangrene within the body
The major thyroid hormone secreted by the thyroid gland is thyroxine, also called T4 because it contains four iodine atoms. To exert its effects, T4 is converted to triiodothyronine (T3) by the removal of an iodine atom. This occurs mainly in the liver and in certain tissues where T3 acts, such as iRead more
The major thyroid hormone secreted by the thyroid gland is thyroxine, also called T4 because it contains four iodine atoms. To exert its effects, T4 is converted to triiodothyronine (T3) by the removal of an iodine atom. This occurs mainly in the liver and in certain tissues where T3 acts, such as in the brain. The amount of T4 produced by the thyroid gland is controlled by another hormone, which is made in the pituitary gland located at the base of the brain, called thyroid stimulating hormone (abbreviated TSH). The amount of TSH that the pituitary sends into the bloodstream depends on the amount of T4 that the pituitary sees. If the pituitary sees very little T4, then it produces more TSH to tell the thyroid gland to produce more T4. Once the T4 in the bloodstream goes above a certain level, the pituitary’s production of TSH is shut off. In fact, the thyroid and pituitary act in many ways like a heater and a thermostat. When the heater is off and it becomes cold, the thermostat reads the temperature and turns on the heater. When the heat rises to an appropriate level, the thermostat senses this and turns off the heater. Thus, the thyroid and the pituitary, like a heater and thermostat, turn on and off.
T4 and T3 circulate almost entirely bound to specific transport proteins. If the levels of these transport proteins changes, there can be changes in how much bound T4 and T3 is measured. This frequently happens during pregnancy and with the use of birth control pills. The “free” T4 or T3 is the hormone that is unbound and able to enter and affect the body tissues.
TESTS
Blood tests to measure these hormones are readily available and widely used, but not all are useful in all situations. Tests to evaluate thyroid function include the following:
TSH TESTS
The best way to initially test thyroid function is to measure the TSH level in a blood sample. Changes in TSH can serve as an “early warning system” – often occurring before the actual level of thyroid hormones in the body becomes too high or too low. A high TSH level indicates that the thyroid gland is not making enough thyroid hormone (primary hypothyroidism). The opposite situation, in which the TSH level is low, usually indicates that the thyroid is producing too much thyroid hormone (hyperthyroidism). Occasionally, a low TSH may result from an abnormality in the pituitary gland, which prevents it from making enough TSH to stimulate the thyroid (secondary hypothyroidism). In most healthy individuals, a normal TSH value means that the thyroid is functioning properly.
T4 TESTS
T4 is the main form of thyroid hormone circulating in the blood. A Total T4 measures the bound and free hormone and can change when binding proteins differ (see above). A Free T4 measures what is not bound and able to enter and affect the body tissues. Tests measuring free T4 – either a free T4 (FT4) or free T4 index (FTI) – more accurately reflect how the thyroid gland is functioning when checked with a TSH.
The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland. A low TSH and low FT4 or FTI indicates hypothyroidism due to a problem involving the pituitary gland. A low TSH with an elevated FT4 or FTI is found in individuals who have hyperthyroidism.
T3 TESTS
T3 tests are often useful to diagnosis hyperthyroidism or to determine the severity of the hyperthyroidism. Patients who are hyperthyroid will have an elevated T3 level. In some individuals with a low TSH, only the T3 is elevated and the FT4 or FTI is normal. T3 testing rarely is helpful in the hypothyroid patient, since it is the last test to become abnormal. Patients can be severely hypothyroid with a high TSH and low FT4 or FTI, but have a normal T3.
FREE T3
Measurement of free T3 is possible, but is often not reliable and therefore not typically helpful.
REVERSE T3
Reverse T3 is a biologically inactive protein that is structurally very similar to T3, but the iodine atoms are placed in different locations, which makes it inactive. Some reverse T3 is produced normally in the body, but is then rapidly degraded. In healthy, non-hospitalized people, measurement of reverse T3 does not help determine whether hypothyroidism exists or not, and is not clinically useful.
THYROID ANTIBODY TESTS
The immune system of the body normally protects us from foreign invaders such as bacteria and viruses by destroying these invaders with substances called antibodies produced by blood cells known as lymphocytes. In many patients with hypothyroidism or hyperthyroidism, lymphocytes react against the thyroid (thyroid autoimmunity) and make antibodies against thyroid cell proteins. Two common antibodies are thyroid peroxidase antibody and thyroglobulin antibody. Measuring levels of thyroid antibodies may help diagnose the cause of the thyroid problem. For example, positive anti-thyroid peroxidase and/or anti-thyroglobulin antibodies in a patient with hypothyroidism result in a diagnosis of Hashimoto’s thyroiditis. While detecting antibodies is helpful in the initial diagnosis of hypothyroidism due to autoimmune thyroiditis, following their levels over time is not helpful in detecting the development of hypothyroidism or response to therapy. TSH and FT4 are what tell us about the actual thyroid function or levels.
A different antibody that may be positive in a patient with hyperthyroidism is the stimulatory TSH receptor antibody (TSI). This antibody causes the thyroid to be overactive in Graves’ Disease. If you have Graves’ disease, your doctor might also order a thyrotropin receptor antibody test (TSHR or TRAb), which detects both stimulating and blocking antibodies. Following antibody levels in Graves’ patients may help to assess response to treatment of hyperthyroidism, to determine when it is appropriate to discontinue antithyroid medication, and to assess the risk of passing antibodies to the fetus during pregnancy.
THYROGLOBULIN
Thyroglobulin (Tg) is a protein produced by normal thyroid cells and thyroid cancer cells. It is not a measure of thyroid function and it does not diagnose thyroid cancer when the thyroid gland is still present. It is used most often in patients who have had surgery for thyroid cancer in order to monitor them after treatment. Tg is included in this brochure of thyroid function tests to communicate that, although measured frequently in certain scenarios and individuals, Tg is not a primary measure of thyroid hormone function.
NON-BLOOD TESTS
RADIOACTIVE IODINE UPTAKE
Because T4 contains iodine, the thyroid gland must pull a large amount of iodine from the bloodstream in order to make an appropriate amount of T4. The thyroid has developed a very active mechanism for doing this. Therefore, this activity can be measured by having an individual swallow a small amount of iodine, which is radioactive. The radioactivity allows the doctor to track where the iodine goes. By measuring the amount of radioactivity that is taken up by the thyroid gland (radioactive iodine uptake, RAIU), doctors may determine whether the gland is functioning normally. A very high RAIU is seen in individuals whose thyroid gland is overactive (hyperthyroidism), while a low RAIU is seen when the thyroid gland is underactive (hypothyroidism). In addition to the radioactive iodine uptake, a thyroid scan may be obtained, which shows a picture of the thyroid gland and reveals what parts of the thyroid have taken up the iodine (see Thyroid Nodules brochure).
MEDICATIONS THAT INTERFERE WITH THYROID FUNCTION TESTING
There are many medications that can affect thyroid function testing. Some common examples include:
Estrogens, such as in birth control pills, or in pregnancy, cause high levels of total T4 and T3. This is because estrogens increase the level of the binding proteins. In these situations, it is better to ask both for TSH and free T4 for thyroid evaluation, which will typically be in the normal range.
See lessBiotin, a commonly taken over-the-counter supplement, can cause the measurement of several thyroid function tests to appear abnormal, when they are in fact normal in the blood. Biotin should not be taken for 2 days before blood is drawn for thyroid function testing to avoid this effect.