Which one of the following preservatives is used while packing catgut suture?
1. Isopropyl alcohol.
2. Colloidal iodine.
3. Glutaraldehyde.
4. Hydrogen peroxide.

• The suture is supplied sterile in "pre-cut" lengths or non-needled or attached to various needle types in one dozen boxes. • Suture is supplied with packing fluid o 90% Isopropyl Alcohol, o 0.5% Sodium Benzoate, o 0.5% Diethylethanolamine and o water q.s. ad 100%.
Explanation1.
Isopropyl alcohol is used while packing catguts. 2. Colloidal iodine is used as a skin disinfectant. 3. 2 % Glutaraldehyde is used for sterilizing Bronchoscope. (Asked in AIPGE 2003)4. Use of Hydrogen peroxide in Surgical Wards is a well known fact and needs no introduction to medical students .