1. Jeffcoate N. Principles of Gynaecology, 4th ed. London and Boston: Butterworths 1974; 483–4.
2. Atkinson RS, Rushman GB, Lee JA. A Synopsis of Anaesthesia, 10th ed. Bristol: Wright 1987; 522–47.
3. Johnson JT, Maloney RW, Cummings CW. Tracheostomy tube: cuff obstruction. JAMA 1977; 211.
4. Hartnett JS. Aberrant inflation of disposable endotracheal tube with complete airway obstruction. Journal of the American Association of Nurse Anesthetists 1970; 38: 57–8.
5. Sioneham FJR. Danger from cuffed endotracheal lubes. BMJ 1952; 2: 565.