The only certain sign of death, however, is that the heart has stopped beating. To ensure that this is permanent, it is necessary to listen over the heart with a stethoscope, or directly with the ear, for at least ?ve minutes. Permanent stoppage of breathing should also be con?rmed by observing that a mirror held before the mouth shows no haze, or that a feather placed on the upper lip does not ?utter.
In the vast majority of cases there is no dif?culty in ensuring that death has occurred. The introduction of organ transplantation, however, and of more e?ective mechanical means of resuscitation, such as ventilators, whereby an individual’s heart can be kept beating almost inde?nitely, has raised diffculties in a minority of cases. To solve the problem in these cases the concept of ‘brain death’ has been introduced. In this context it has to be borne in mind that there is no legal de?nition of death. Death has traditionally been diagnosed by the irreversible cessation of respiration and heartbeat. In the Code of Practice drawn up in 1983 by a Working Party of the Health Departments of Great Britain and Northern Ireland, however, it is stated that ‘death can also be diagnosed by the irreversible cessation of brain-stem function’. This is described as ‘brain death’. The brain stem consists of the mid-brain, pons and medulla oblongata which contain the centres controlling the vital processes of the body such as consciousness, breathing and the beating of the heart (see BRAIN). This new concept of death, which has been widely accepted in medical and legal circles throughout the world, means that it is now legitimate to equate brain death with death; that the essential component of brain death is death of the brain stem; and that a dead brain stem can be reliably diagnosed at the bedside. (See GLASGOW COMA SCALE.)
Four points are important in determining the time that has elapsed since death. HYPOSTASIS, or congestion, begins to appear as livid spots on the back, often mistaken for bruises, three hours or more after death. This is due to the blood running into the vessels in the lowest parts. Loss of heat begins at once after death, and the body has become as cold as the surrounding air after 12 hours – although this is delayed by hot weather, death from ASPHYXIA, and some other causes. Rigidity, or rigor mortis, begins in six hours, takes another six to become fully established, remains for 12 hours and passes o? during the succeeding 12 hours. It comes on quickly when extreme exertion has been indulged in immediately before death; conversely it is slow in onset and slight in death from wasting diseases, and slight or absent in children. It begins in the small muscles of the eyelid and jaw and then spreads over the body. PUTREFACTION is variable in time of onset, but usually begins in 2–3 days, as a greenish tint over the abdomen.... death, signs of
FAMILY: Myrtaceae
SYNONYMS: Lemon-scented gum, citron-scented gum, scented gum tree, spotted gum, ‘boabo’.
GENERAL DESCRIPTION: An attractive, tall, evergreen tree with a smooth dimpled bark, blotched in grey, cream and pink, cultivated as an ornamental. The trunk grows fast, straight and to considerable height, and is used for timber. The young leaves are oval, the mature leaves narrow and tapering.
DISTRIBUTION: Native to Australia; cultivated mainly in Brazil and China.
OTHER SPECIES: There are numerous other species of eucalyptus – see entry on eucalyptus blue gum. See also Botanical Classification section.
HERBAL/FOLK TRADITION: Used traditionally for perfuming the linen cupboard by enclosing the dried leaves in a small cloth sachet. During the last century it was regarded as a good insect repellent, especially for cockroaches and silverfish.
ACTIONS: Antiseptic, antiviral, bactericidal, deodorant, expectorant, fungicidal, insecticide.
EXTRACTION: Essential oil by steam distillation from the leaves and twigs.
CHARACTERISTICS: A colourless or pale yellow mobile liquid with a strong, fresh, citronella-like odour and sweet balsamic undertone.
PRINCIPAL CONSTITUENTS: Citronellal (80–95 per cent), citronellol, geraniol and pinene, among others. (The gum or ‘kino’ contains the antibiotic substance ‘citriodorol’.)
SAFETY DATA: Non-toxic, non-irritant, possible sensitization in some individuals. Eucalyptus oil is toxic when taken internally, see Eucalyptus blue gum entry.
AROMATHERAPY/HOME: USE
Skin Care: Athlete’s foot and other fungal infections (e.g. candida), cuts, dandruff, herpes, insect repellent, scabs, sores, wounds.
Respiratory System: Asthma, laryngitis, sore throat.
Immune System: Colds, fevers, infectious skin conditions such as chickenpox, infectious disease. ‘The essential oil contained in the leaves appears to have bacteriostatic activity towards Staphylococcus aureus; this is due to synergism between the citronellol and citronellal present in the oil’..
OTHER USES: Used as a fragrance component (in place of E. globulus) in soaps, detergents and perfumes; also used in room sprays and insect repellents Employed for the isolation of natural citronellal.... lemon-scented
FAMILY: Verbenaceae
SYNONYMS: A. citriodora, Verbena triphylla, Lippia citriodora, L. triphylla, verbena, herb Louisa.
GENERAL DESCRIPTION: A handsome deciduous perennial shrub up to 5 metres high with a woody stem, very fragrant, delicate, pale green, lanceolate leaves arranged in threes, and small, pale purple flowers. Often grown as an ornamental bush in gardens.
DISTRIBUTION: Native of Chile and Argentina; cultivated (and found semi-wild) in the Mediterranean region – France, Tunisia, Algeria – as well as Kenya and China. The oil is mainly produced in southern France and North Africa.
OTHER SPECIES: Botanically related to the oregano family – see Botanical Classification section. Not to be mistaken for the so-called ‘Spanish verbena’ or ‘verbena’ oil (Spanish) (Thymus hiamalis), nor confused with the herb ‘vervain’ (Verbena officinalis). This is further confused since the French name for verbena is verveine (Verveine citronelle, Verveine odorante).
HERBAL/FOLK TRADITION: ‘The uses of lemon verbena are similar to those of mint, orange flowers and melissa.’. It is indicated especially in nervous conditions which manifest as digestive complaints. The dried leaves are still used as a popular household tea especially on the Continent, both as a refreshing, uplifting ‘pick-me-up’ and to help restore the liver after a hang-over.
ACTIONS: Antiseptic, antispasmodic, carminative, detoxifying, digestive, febrifuge, hepatobiliary stimulant, sedative (nervous), stomachic.
EXTRACTION: Essential oil by steam distillation from the freshly harvested herb.
CHARACTERISTICS: A pale olive or yellow mobile liquid with a sweet, fresh, lemony, fruity-floral fragrance. It blends well with neroli, palmarosa, olibanum, Tolu balsam, elemi, lemon and other citrus oils.
PRINCIPAL CONSTITUENTS: Citral (30–35 per cent), nerol and geraniol, among others.
SAFETY DATA: Possible sensitization; phototoxicity due to high citral levels. Other safety data is unavailable at present – however, true verbena oil is virtually non-existent. Most so-called ‘verbena oil’ is either from the Spanish verbena (an inferior oil), or a mix of lemongrass, lemon, citronella, etc.
AROMATHERAPY/HOME: USE
Digestive system: Cramps, indigestion, liver congestion.
Nervous system: Anxiety, insomnia, nervous tension and stress-related conditions.
OTHER USES: Used in perfumery and citrus colognes – ‘eau de verveine’ is still popular in France, Europe and America.... verbena, lemon
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