Читать книгу Veterinary Treatment of Pigs - Graham R Duncanson - Страница 99

Broken needles are rare, particularly if the correct length and gauge are used. The length required is not only dependent on the size of pig but also whether the injection has to go subcutaneously (sc), intramuscularly (im) or intravenously (iv). Obviously long needles are more likely to break than shorter needles. Breakage may occur mid-shaft or at the end near to the syringe. Breakage can occur in disposable syringes actually where the needle fits on to the syringe. When injecting adults or large pigs, pig keepers and practitioners are urged to use non-disposable syringes with a luer-lock fitting. The gauge of the needle will depend not only on the size of pig but also the viscosity of the fluid for injection. Long-acting preparations are notoriously viscous.