Type

Journal Article

Authors

John D Russell
Seamus Giles
Madeline Murphy
Nicola A Kelly

Subjects

Microbiology

Topics
laryngostenosis glottis mucous membrane goblet cells mucins animals injuries prospective studies disease models animal laryngoscopy pilot projects reproducibility of results rabbits pathology

Subglottic injury: a clinically relevant animal model. (2011)

Abstract To develop a clinically aligned, reproducible model for subglottic injury. Prospective randomized control pilot study. Juvenile (3-month-old) New Zealand White rabbits underwent intubation with a 3-cm length of an endotracheal tube that was chosen so that there would be no air leak below 20 cm of water. This tube was one or two sizes above the appropriate tube for the animal. It was held in situ with a suture placed at the trachea and secured over a button in the neck for a period of 1 week. Animals were sacrificed 1 week postextubation, and larynges were harvested. A range of histological techniques and gross morphology were utilized to examine the injury caused at the level of the subglottis. Unintubated animals constituted controlled specimens. Intubated animals demonstrated considerable histopathology including evidence of ulceration, inflammation, granulation tissue, perichondritis, and chondritis when compared with control animals. Morphometric analysis demonstrated a significant increase in lamina propria thickness (P = .0013), mucosal thickness (P ≤ .0001), and in goblet cell areal density (P = .014). Analysis of mucin types found a significant decrease in acidic (P = .0001) mucin coinciding with a significant increase in mixed mucin types (P = .0013). Our model provides a reliable and reproducible technique for acute/subacute injury to the subglottis secondary to intubation, which is consistent with previous histological findings of early changes associated with acquired subglottic stenosis (SGS). Future uses of this model could include the examination of current adjunctive therapies and their effects on limiting progression to SGS.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

John D Russell, Seamus Giles, Madeline Murphy, Nicola A Kelly

Experts in our system

1
Madeline Murphy
University College Dublin
Total Publications: 37