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Haemaccel Quick Reference: (hem-a-cel) Intravenous (IV) solution used as a plasma expander.

Advanced Reference: A gelatin solution with a high molecular weight (30,000) and therefore useful as a plasma expander. Due to its lengthy shelf-life is used in major accident packs where prolonged storage may be required. Known to produce hypersensitivity reactions so used with caution.

Haematemesis Quick Reference: (hem-a-tem-e-sis) Vomiting of blood.

Advanced Reference: Usually due to bleeding from the stomach. If dark in colour, can indicate that it has been in the stomach for a lengthy time and been partially digested by gastric secretions and often referred to as coffee-granule appearance.

Haematocrit Quick Reference: Total red cell volume (count).

Advanced Reference: Also referred to as packed cell volume (PCV) and expressed as a proportion of blood volume.

Haematology Quick Reference: (hem-a-tol-ogy) Indicates the blood.

Advanced Reference: The speciality that deals with the composition, function and disease of blood.

Haematoma Quick Reference: (hem-a-toe ma) A blood-filled swelling.

Advanced Reference: A swelling caused by bleeding into the tissues usually as the result of injury or after injection (intramuscular (IM), intravenous (IV), intra-arterial (IA), etc).

Haematuria Quick Reference: (hem-a-tur-ea) Blood in the urine.

Advanced Reference: Blood in the urine, usually a symptom of injury or disease to any part of the urinary tract. May also be witnessed short term following unconnected surgery of the pelvis and lower abdomen.

Haemodialysis Quick Reference: (hemo-di-al-a-sis) A form of renal dialysis.

Advanced Reference: One form of renal dialysis used in chronic renal failure via a shunt or atrioventricular (AV) fistula. See renal dialysis.

Haemoglobin Quick Reference: The red pigment of the blood carried by the red blood cells (erythrocyte). The abbreviation is Hb.

Haemolysis

Advanced Reference: Composed of the protein globin and an iron compound, haem and is the means of transporting oxygen from the lungs to the rest of the body.

Haemolysis Quick Reference: (hem-ol-y-sis) Breakdown of red blood cells.

Advanced Reference: The disintegration of red blood cells followed by the liberation of blood pigment into the circulation. Can occur in conditions of the new born, following heart valve surgery or due to parasites such as malaria or allergic reactions.

Haemophilia Quick Reference: (hem-o-fil-ia) Blood disease involving deficiency of blood-clotting factors.

Advanced Reference: Haemophilia is an inherited disease affecting males but carried by females who remain unaffected. Haemophiliacs are unable to synthesise factor VIII. This absence produces prolonged and repeated haemorrhage which can be external or internal, the latter sometimes due to no obvious cause.

Haemoptysis Quick Reference: (hem-op-te-sis) Coughing up or spitting of blood.

Advanced Reference: Can be due to bleeding within the mouth or nose or from the respiratory tract and lungs.

Haemorrhage Quick Reference: (hem-or-age) Escape of blood from a vessel.

Advanced Reference: Haemorrhage or bleeding can be internal or external and from an artery, vein or capillary. In relation to theatre and surgery, there are three stages of bleeding: primary, which occurs at the time of operation; reactionary, which occurs within 24 h of injury or operation; secondary, occurs after 7-10 days post-operatively.

Haemorrhoids Quick Reference: (hem-a-roids) Commonly referred to as piles.

Advanced Reference: Varicose veins found at the junction of the rectum and anal canal. Can be internal or external to the anal sphincter. Causes include constipation and uterine pressure during pregnancy.

N Halcion Quick Reference: (hal-see-on) Tranquilliser and hypnotic. < Advanced Reference: A preparation of the benzodiazepine triazolam

J used primarily to treat insomnia.

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