6Toye FJ, Weinstem JD. A percutaneous tracheostomy device. Surgery,1969,65:384-389.
7Ciaglia P, Ftrsching R, Syniec C. Elective percutaneous dihtational tracheostomy: a new simple bedside procedure; preliminary report.Chest, 1985,87:715-719.
8Hazard PB,Garrett HE,Adams JW. Bedside percutaneous tracheostomy: experience with 55 elective procedures. Ann Thorac Surg, 1988 Jul, 46(1):63-67.
9Hazard P,Jones C,Benitone J. Comparative clinical trial of standard operative tracheostomy with percutaneous tracheostomy. Crit Care Med, 1991,19:1018-1024.
10Schachner A,Ovil Y, Sidi J,Rogev M, Heilbmnn Y, Levy MJ. Percutaneous tracheostomy-a new method; Critical Care Medicin,1989,17:1052-1056.
