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Intermittent

Advanced Reference: Illness or condition arising in the course of another illness. Intercurrent disease.

Intermittent Quick Reference: At intervals, rather than all at one time.

Advanced Reference: Used in relation to (i) intermittent injection, i.e. giving increments of a drug rather than one single dose; (ii) intermittent pain, i.e. pain that is not constant but comes and goes; (iii) intermittent positive-pressure ventilation (IPPV), i.e. intermittent ventilation of the lungs.

Intermittent claudication Quick Reference: Muscle pain that comes on after exercise.

Advanced Reference: Caused by arterial disease, usually affecting the calf muscles. Due to the muscles being starved of oxygen by the poor blood supply and therefore unable to get rid of waste products, e.g. lactic acid.

Interstitial Quick Reference: Indicates the spaces between the tissues/cells.

Advanced Reference: As opposed to intercellular, it is the fluid in which body cells are bathed. Also, sometimes termed background tissue, which supports the active tissue of an organ.

Intestinal bag Quick Reference: A surgical sundry used to hold the intestines during abdominal surgery.

Advanced Reference: The intestines are placed into a clear plastic bag to help prevent fluid and heat loss during surgery. Also the clear plastic allows the surgeon to observe the intestine for any colour changes.

Intestine Quick Reference: The alimentary canal after it leaves the stomach.

Advanced Reference: Comprised of the small intestine, duodenum, pylorus, jejunum, ileum and large intestine which terminates at the anus.

Intra-occular Quick Reference: Within the eyeball.

Advanced Reference: Indicates pressure inside the eye, as in glaucoma.

Intra-osseus Quick Reference: Indicates into a bone.

Advanced Reference: An intra-osseus infusion is injection of fluids/

N blood, etc. into the bone marrow. Used in emergency situations when IV

< access is not possible. Also commonly used with children. e o

0 Intrathecal Quick Reference: Within a sheath.

01 Advanced Reference: As with intrathecal injection, i.e. the injection of ent LAs into the spinal canal (spinal anaesthesia).

g Intubation Quick Reference: The introduction of a tube into the body.

a Advanced Reference: The term most commonly refers to intubation of

.g the trachea with an endotracheal (ET) tube.

S. Intussusception Quick Reference: Condition in which part of the intestine telescopes into the next segment.

Ischaemia

Advanced Reference: Most cases occur in infants but may be seen in adults. Examples are the large intestine invaginating into itself or the last part of the ileum prolapsing into the caecum. Can lead to obstruction which requires surgical intervention.

Invaginate Quick Reference: To fold inwards.

Advanced Reference: This folding in can lead to the formation of a pouch, as with intussusception of the intestine.

Iodine Quick Reference: A naturally occurring element.

Advanced Reference: In medicine, it is essential for the correct functioning of the thyroid gland and also used in solution as an effective antiseptic.

lonisation Quick Reference: Term used with reference to high-energy electromagnetic waves, such as X-rays and gamma rays.

Advanced Reference: Ionising radiations are so called because when they pass through matter they cause ionisation, whereby neutral atoms acquire a temporary electric charge. X-rays and gamma rays are examples of ionising radiation. Ionising radiation has penetrative powers whereas non-ionising does not. Ultraviolet and infrared are examples of non-ionising radiation.

lonise(ing) Quick Reference: With reference to radiation (ionising and non-ionising).

Advanced Reference: X-rays are the common example of ionising radiation. When ionising radiation passes through the body it can bring about changes in cells, etc.

Iris Quick Reference: The coloured part of the eye.

Advanced Reference: Lies behind the cornea and is comprised of two muscle layers which alter the size of the pupil and so control the amount of light entering the eye. Iritis is inflammation of the iris and iridectomy is removal of part of the iris usually due to glaucoma.

Iron Quick Reference: Naturally occurring metallic element.

Advanced Reference: Heamoglobin (Hb) is made up of an iron compound (haem). Iron-deficiency anaemia is a common type of anaemia.

Irradiation Quick Reference: Exposure to radiation.

Advanced Reference: Usually refers to treatment by ionising radiation for cancer treatment.

Irrigation Quick Reference: To supply a stream of water or other fluid.

Advanced Reference: The washing out of a cavity or wound by a stream of water or other fluid. Examples are lavage of a wound or bladder irrigation during or after surgery of the prostate gland.

Ischaemia Quick Reference: (is-keem-ea) Inadequate blood supply to a part of the body.

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