b'Chapter hapterPressure ImmobilisationThe purpose of Pressure Immobilisation is to slow/stop the movement of venom from the site of the bite or sting into the blood stream. Research shows that very little venom (about 15%) reaches the blood stream (even after several hours) if firm pressure is applied immediately to the bite site and the limb is kept still (immobilised).Research also shows that there may be inactivation of certain venoms and venom components when the injected venom remains trapped in the tissues by the pressure bandage.Place a pad over the bite site (a swab of venom will assist with snake identification). If on a limb, apply a broad pressure bandage over the pad/bite site and around the limb, assoon as possible. The bandage compresses the tiny lymphatic vessels which carry the venom. An elasticised bandage is preferable (10cm15cm wide) but if not available, improvise by using clothing or torn up sheets/strips about 7cm to 10cm wide.In order to further restrict lymphatic flow and to assist in immobilisation of the limb,apply a second bandage and completely encircle the limb with firm pressure commencing at the fingers or toes of the bitten limb then continuing up the entire limb to the groin or armpit. The bandage should be applied over existing clothing if possible. Alternatively a single bandage may be used to achieve both pressure on the bite site and immobilisation of the limb. This bandage is initially applied to the fingersor toes and extended up the limb as far as possible including over the bite site.The bandage should be applied firmly but not too tight as to restrict circulation. You should be unable to slide a finger between the bandage and skin.Bites and Stings 157'