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intermittent

Stopping or ceasing for a time.

intermittent claudication

A cramp-like muscular pain that is caused by an inadequate blood supply, and so is brought on by exercise and relieved by rest.

international normalised ratio

A system for reporting the results of blood clotting tests.

interstitial cystitis

Chronic irritation or inflammation of the bladder not due to an infection.

intervertebral disc

One of the tough pads of fibre and cartilage that separate the vertebrae and act as cushions to absorb forces on the spine.

intestinal

relating to the intestines, the digestive tract between the stomach and the anus

intestinal anastomosis

A surgical procedure to join two ends of healthy intestine after a section of diseased intestine has been removed.

intestine

The section of gut, or gastrointestinal tract, from the stomach to the anus.

intestines

The major part of the digestive tract.

intoxication

A general term for a condition resulting from poisoning.

intracerebral

Within the brain.

intracerebral haemorrhage

[Defined separately]

intracoronary

Within one of the arteries supplying the heart, the coronary arteries.

intracranial

Within the skull.

intracranial pressure

The pressure within the skull.

intraduct carcinoma

A type of non-invasive breast cancer also known as ductal carcinoma in situ (DCIS)

intranasal

Within the nose.

intraocular pressure

Fluid pressure inside the eye.

intraorbital

Within the eye socket.

intrauterine

inside the uterus

intrauterine contraceptive device

A small device placed into the uterus to prevent conception, possibly by preventing the implantation of the embryo.

intravenous

Within a vein.

intravenous pyelogram

X-ray images of the kidneys taken after the injection of a dye into the veins, so that the urinary tract can be assessed more easily.

intravenous urogram

An x-ray that gives a clear image of the urinary tract.