The Erasmus Atelectasis Classification: Proposal of a New Classification for Atelectasis of the Middle Ear in Children

Abstract

We found the currently proposed classification more useful in that it follows the natural progression of the disease and is more practical in determining operative procedures at each stage.

The extraordinary healing properties of the pediatric tympanic membrane: A study of atelectasis in the pediatric ear

“…All patients were classified and treated according to the Erasmus classification for pediatric atelectasis (Table 1), as has been described in some detail elsewhere [16]. Recurrence of the atelectasis was documented, though re-operations were not included in this analysis.…”

Atelectasis of the middle ear in pediatric patients: Safety of surgical intervention

“…From the case notes the following data were collected: sex, age, operative findings of the tympanic membrane, the number and type of surgeries, pre-and postoperative audiograms and length of follow-up. Based on the clinical appearance of the tympanic membrane, and the findings at surgery, each ear was subdivided into one of the five groups of the Erasmus classification (Table 1) [12]. For parametric data, the mean was calculated together with the standard deviation (S.D.)…”

“…In an attempt to provide evidence regarding the safety of early intervention we have used a new classification of pediatric pars tensa retractions to analyze the audiological outcome of early surgical intervention in atelectasis [12] (Table 1). …”

A Working Classification of Retraction for the Whole Tympanic Membrane

“…Following this Bours adapted use of endoscopy to the classification [6]. The Erasmus classification again modifies that of Sade with the stage for ossicles and promontory reversed and a deeper retraction group is included [7]. However, whether retraction reaches the promontory or ossicles first is not necessarily a stage of disease but simply related to where the retraction starts.…”