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    Introducing a fluid into the bloodstream through a vein (usually in the patient's forearm).


A blood vessel that carries blood from the body back into the heart.


Intra-aortic Balloon Pump Assist Device
The intra-aortic balloon pump is a machine that can help the pumping function of the heart. It is usually inserted through an artery in the groin area and threaded backwards into the descending thoracic aorta in the chest. In this location the balloon inflates and deflates in synchrony with the heart in order to aid the blood pumping function of the heart in patients with cardiac disease.

Injection into an artery (that may supply a tumor).

Intracardiac Tumor
An Intracardiac Tumor can be any tumor of the heart, either malignant or benign. The most common tumor of the heart is a benign atrial myxoma.

Within cells.

Located within the cerebral hemispheres (cerebrum). See extracerebral.

Intracerebral haemorrhage
Haemorrhage within the brain.

Within the skull.

Intracutan test
Intracutan tests are used to diagnose allergies. A small amount of allergen extract is injected under the skin on your arm. If the area becomes itchy, reddish and swelling you may have an allergy.

Intracytoplasmic sperm injection
An assisted reproductive method in which a sperm is injected directly into an unfertilized egg with a microscopic needle; this procedure is used in cases of severe male factor infertility.

Within the skin.

Beneath the dura mater.

Intralipid 10 per cent
Intralipid 10 per cent is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): soybean oil.

Intralipid 20 per cent
Intralipid 20 per cent is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): soybean oil.

Intralipid 30 per cent
Intralipid 30 per cent is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): soybean oil.

Intra (within) muscular (muscle) techniques are ways to put medication into the body, by injecting it into a muscle. This is designed for drugs that need to be absorbed slowly. A classic example is a tetanus shot.

Intramuscular Injection
Putting a fluid into a muscle with a needle and syringe.

Intraoral camera
A smal video camera used to view and magnify oral conditions; images may be printed.

Intrapartal care
Care for a pregnant woman through labor.

Inserting chemotherapy drugs directly into the abdominal cavity. Intraoperative photodynamic therapy is a new treatment that uses special drugs and light to kill cancer cells. Its use in the early states of mesothelioma in the chest is being studied. Judgement - an official court order deciding the rights or claims of the parties in a legal proceeding.

Inserting chemotherapy drugs directly into the chest cavity.

Intrarater reliability
The property of yielding equivalent results when used by the same rater on different occasions.

Injection into the sub-arachnoid space of the meninges. Usually done by lumbar puncture.

Injection into a tumor (usually performed during surgery).

Within the womb.

Intrauterine device
A small engineered piece of plastic or metal placed in a woman's uterus to prevent fertilization.

Intrauterine growth retardation
Slow growth of a fetus in the womb possibly resulting in a low birth weight baby.

Intrauterine insemination
Treatment for infertility in which semen is introduced into the uterus via a slim tube inserted through the vagina.

Inside a blood vessel.

Intravascular echocardiography
Echocardiography and cardiac catheterization.

Intravascular ultrasound (IVUS)
An invasive procedure, performed along with cardiac catheterization; a miniature sound probe (transducer) on the tip of a coronary catheter is threaded through the coronary arteries and, using high-frequency sound waves, produces detailed images of the interior walls of the arteries.

Intravenous (IV)
Delivery of drugs, fluids or food directly into a vein.

Intravenous Injection
Putting a fluid into a vein with a needle and syringe.

Injection into a ventricle.

Intraventricular hemorrhage
Bleeding into the ventricles or the brain, common in premature infants.

Intrinsic asthma
Asthma that has no apparent external cause.

Pertaining to a sensory organ that registers information from within the body.

The insertion of one part into another; in sexual intercourse, the insertion of the penis into the vagina.

A segment of DNA that does not code for protein; the intervening sequence of nucleotides between coding sequences or exons.

Intron a
Intron a is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): interferon alfa-2b.

Intropin is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): dopamine hydrochloride.

Self-observation; examination of one's feelings, often as a result of psychotherapy.

Preoccupation with oneself and accompanying reduction of interest in the outside world. Contrast to extraversion.


In vitro fertilization
IVF. A method of assisted reproduction that involves combining an egg with sperm in a laboratory dish. If the egg fertilizes and begins cell division, the resulting embryo is transferred into the woman's uterus where it will hopefully implant in the uterine lining and further develop. IVF may be performed in conjunction with medications that stimulate the ovaries to produce multiple eggs in order to increase the chances of successful fertilization and implantation. IVF bypasses the fallopian tubes and is often the treatment choice for women who have badly damaged or absent tubes.

Identical twins
Two offsprings born at the same time who look exactly alike. Identical twins are also called monozygotic twins because they develop from the same egg: a single fertilised egg splits early in development and becomes two separate fetuses.

Infectious disease
Disease caused by microbes that can be passed to or among humans. It occurs when cells or molecules in a person's body stop working properly, causing symptoms of illness. Many things can make someone more susceptible to disease, including altered genes, chemicals, aging, and infections.

Iron deficiency anemia
A type of hypochromic microcytic anemia caused by low or absent iron stores and serum iron concentration; there is elevated free erythrocyte porphyrin, low transferrin saturation, elevated transferrin, low serum ferritin, and low hemoglobin concentration. Symptoms may include pallor, angular stomatitis and other oral lesions, gastrointestinal complaints, retinal hemorrhages and exudates, and thinning and brittleness of the nails, occasionally leading to spoon nails.

Insulin-dependent diabetes
A condition in which the body's immune system destroys the cells in the pancreas that produce insulin. Insulin allows glucose to enter the cells of the body to provide energy. Persons with type 1 diabetes must take daily insulin injections.


A tissue that connects the two lobes of the thyroid.

Irritable Bowel Syndrome (IBS)
A disorder of the intestine that affects motility and causes abdominal pain, bloating and irregular bowel movements (constipation and / or diarrhoea). Used to be known in the past as spastic colon or colitis and irritable colon. It should not be confused with irritable bowel disease but can be seen simultaneously with IBD.

Internal Medicine
A broad-based medical field in which physicians rely on their knowledge of major organs to diagnose and treat patients. Internists treat a variety of afflictions, from colds and heart problems to infectious diseases. Internists often serve as a patient's primary doctor, coordinating all that person's health care

Potent systemic medication used to treat severe forms of acne. Due to potential birth defects, a woman must not take this medication while pregnant or breast feeding and must not become pregnant while taking isotretinoin.

Immune System
The body's natural defense system which produces antibodies to fight against foreign substances such as bacteria, viruses, toxins, and cancers.

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