Use of split cellulose for ear packing: comparative experimental evaluation based on postoperative clinical and microbiological observations

Abstract

BACKGROUND: Postoperative packing of the external auditory canal is still controversial. The shape of a wick, its material, the time of its presence in the ear canal and in the postoperative cavity, and the type of packing depending on the type of surgery are still under discussion. There are many different packing techniques, but there is no single standardized one.

AIM: The aim of the study was to evaluate characteristics of split cellulose compared to other materials for ear canal packing after ear surgery in an animal experiment based on postoperative clinical and microbiological observations.

MATERIALS AND METHODS: For the experiment, 36 chinchilla rabbits were used. The animals were divided into three groups according to the material of the ear canal wick: cellulose, microporous sponge of hydrolyzed polyvinyl acetate; medical gauze. The condition of the postoperative wound, the condition of the wicks for the presence of ear discharge, and the inflammatory response of the ear canal tissues were assessed. A microbiological study involved isolation and identification of pure bacterial cultures. Microbial growth was assessed based on the count of colony forming units (CFU).

RESULTS: The study showed that the presence and degree of clinical response did not correlate with the type of packing material in the ear canal. The ear canal packing with split cellulose, microporous hydrolyzed polyvinyl acetate sponge, medical gauze did not cause the growth of pathogenic microflora during the experimental period up to 21 days, and the absence of significant local reaction of the tympanic membrane and ear canal in rabbits suggests that split cellulose can be used as one of the promising import-substituting packing materials for ear canal and trepanation cavities after middle ear surgeries.

Keywords

otosurgery / ear surgery / cellulose ear wick / ear packing materials / tympanoplasty / ear experiment

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