Thomas splint Quick Reference: Splint used to immobilise knee, femur, etc. Advanced Reference: The shape and design of this splint supports the limb as well as moving the weight from the knee joint to the pelvis. Named after the British orthopaedic surgeon, Hugh Thomas.
Thoracic duct Quick Reference: The large lymph vessel that begins at the cisterna chyli which is a sac lying adjacent to the aorta in the aortic opening of the diaphragm. Into this drains the right and left lumbar lymph trunks draining the lower limbs and intestinal trunk. From here the thoracic duct runs up through the thorax to the neck and comes to lie on the right side of the oesophagus. The lymph carried by the thoracic duct runs into the subclavian vein.
Thoracoscopy Quick Reference: Inspection of the interior of the chest through an endoscope.
Advanced Reference: More specifically involves examination of the pleural cavity as well as the thoracic cavity.
Thoracotomy Quick Reference: The surgical opening of the wall of the chest.
Advanced Reference: Any surgical operation that involves opening the thorax.
Thorax Quick Reference: The chest compartment.
Advanced Reference: The thorax is enclosed by the ribs, reaching from the first rib to the diaphragm.
Throat spray Quick Reference: Refers to an LA throat spray used in anaesthesia.
Advanced Reference: Used after induction and/or muscle relaxation to decrease the stimulus and presence of the endotracheal (ET) tube by coating the laryngeal and tracheal mucosa with (usually 4%) lignocaine. Originally delivered via a refillable Macintosh and Forrester spray but more recently a preloaded sealed unit has been available.
Throb Quick Reference: To beat or pulsate.
Advanced Reference: Felt in the presence of infection when the area is said to throb.
Thrombin Quick Reference: An enzyme involved in the coagulation of blood.
Advanced Reference: Thrombin converts fibrinogen to fibrin during the blood-clotting process.
Thrombophlebitis Quick Reference: (throm-bo-fle-bitis) Inflammation of a vein with consequent thrombosis.
Advanced Reference: With reference to theatre patients, it is commonly associated with post-operative IV cannula sites. Involves clotting at the site combined with inflammation of the lining of the vessel.
Thrombosis Quick Reference: Formation of a clot or thrombus in a blood vessel.
Advanced Reference: May occur in arteries when the walls have been roughened by atherosclerosis or in veins when the circulation becomes sluggish or stagnant.
Thrombus Quick Reference: Thrombosis is formation of a blood clot within a vessel.
Advanced Reference: Indicates a blood clot that formed within the vessel (usually a vein) and is stationary. Once it moves from its original site, it is termed an embolus.
Thymol Quick Reference: A mild antiseptic derived from oil of thyme.
Advanced Reference: A hydrocarbon also used as an anti-oxidant in some volatile agents. Other uses are as a disinfectant, mouthwash and deodorant.
Thymus Quick Reference: (thi-mus) Gland which lies at the root of the neck behind the breastbone in the upper mediastinum.
Advanced Reference: The gland grows from birth to puberty and thereafter diminishes in size but remains active. It is an important part of the lymphatic system being responsible for the formation of lymphocytes (T-cells) which are essential in the immune reaction.
Thyroid Quick Reference: A ductless gland lying in the neck.
Advanced Reference: The thyroid lies at the front of the neck in front of the trachea and just below the larynx. It has two lobes and secretes two hormones, thyroxine being the most prominent. Swelling of the gland is known as goitre and normal function of the gland depends on an adequate intake of iodine in the diet.
Thyrotoxicosis Quick Reference: (thyro-tox-i-cosis) Overactivity of the thyroid gland.
Advanced Reference: Also termed hyperthyroidism. Involves enlargement of the gland and a speeding up of metabolism resulting in nervousness, sweating, emotional overactivity, loss of weight, etc.
TIA Quick Reference: Transient ischaemic attack. Minor stroke.
Advanced Reference: Involves numbness in the affected part, face, arm, etc.; sometimes with speech disturbance, nausea, double vision but not usually loss of consciousness. It is due to small clots partially blocking arteries in the brain and connected nerves lose function temporarily unlike with a major stroke where there is no return of function. However, TIAs may indicate future stroke.
Tibia Quick Reference: The shin bone.
Advanced Reference: One of the two parallel bones in the lower leg and extends from the knee to the ankle. Corresponding with the radius in the
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