This invention relates to the field of medical devices, specifically disclosing a medical
defoamer and its preparation method. Existing medical defoamers primarily function to lubricate and eliminate gastrointestinal foam, but often have limited functionality or poor synergistic effects, impacting the
clarity of gastroscopy,
patient comfort, and operational efficiency. The medical
defoamer of this invention comprises, by weight percentage: 1-5% dimethyl
silicone oil, 0-1% Span 60, 0-0.5% Span 80, 5-10% Tween 80, 5-10%
glycerol, 0.5-1%
lidocaine hydrochloride, 0-0.5%
potassium sorbate, 0.2-1% mono-
fatty acid glycerides, and the remainder being
purified water. The formulation uses a compound of dimethyl
silicone oils of different viscosities and specific proportions as the core lubricating and defoaming matrix; employs a non-ionic composite emulsification
system of Span and Tween to ensure stable emulsification of the oil and water phases; introduces mono-
fatty acid glycerides as a physical defoaming aid and
system stabilizer; and uses
lidocaine hydrochloride to achieve surface
anesthesia.