QRS-complex Quick Reference: Represents ventricular depolarisation.

Advanced Reference: Normal duration is approximately 0.12 s. The Q-wave is the initial downward deflection of the QRS-complex. The QT-interval represents the duration of ventricular systole.

Quack Quick Reference: A charlatan, fraud.

Advanced Reference: Term applied to someone (impersonating another or pretending to be what they are not (professionally), commonly a medical doctor).

Quadrants Quick Reference: Areas, regions and quarters.

Advanced Reference: The abdominal and pelvic areas of the trunk are divided into quadrants, i.e. right upper and lower quadrants and left upper and lower quadrants.

Quadriceps Quick Reference: The large muscle covering the front of the thigh.

Advanced Reference: The main combination of four muscles within the lower limbs that give structure and mobility to extension and straightening of the knee.

Quadriplegia Quick Reference: Paralysis of all four limbs.

Advanced Reference: Also termed tetraplegia.

Qualitative Quick Reference: Pertaining to quality.

Advanced Reference: The value or nature of something. Determines the presence or absence of a substance.

Quality assurance Quick Reference: Also known as quality management. An aspect of general and hospital management. Indicates a standard or level of excellence.

Advanced Reference: A management system that assures quality with the work for which one is responsible.

Quantiflex Quick Reference: Type of anaesthetic machine.

Advanced Reference: This machine is common in dental anaesthesia. It has a number of specific features, i.e. separated flowmetres, one common control knob that adjusts total gas flow (oxygen and nitrous), and

Quantitative most notably that the design prevents delivery of hypoxic mixtures with the capacity to deliver no lower than 30% oxygen.

Quantitative Quick Reference: Capable of being measured.

Advanced Reference: Quantitative analysis is the determination of the amounts of constituents in a sample.

Quart Quick Reference: Unit of fluid volume.

Advanced Reference: Fluid measure equivalent to one-quarter of a gallon, or two pints, 32 fluid ounces, 946.24 ml.

Quinidine Quick Reference: A drug obtained from the cinchona tree called delanide.

Advanced Reference: Used in the treatment of irregular heart action (cardiac arrhythmias), more specifically, ventricular extrasystoles and ventricular tachycardia.

Quinine Quick Reference: Alkaloid made from the bark of the cinchona tree.

Advanced Reference: Used as a remedy in malaria and can be given orally or intravenously (IV).

Quinsy Quick Reference: Abscess surrounding the tonsil.

Advanced Reference: Peritonsillar abscess, where infection has occurred in the surrounding tissue of the tonsil area. Characterised by symptoms of sore throat, fever and difficulty swallowing. Treated initially with antibiotics; however, extreme cases will require surgical intervention.

Quintuplet Quick Reference: Five-fold.

Advanced Reference: Five offspring born at the same gestation period during a single pregnancy.

Quotient Quick Reference: Result from dividing one quantity by another.

Advanced Reference: The respiratory quotient is the ratio between the carbon dioxide expired and the oxygen inspired during a specified time.

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