Rare Complication of Orotracheal Intubation: Obstructive Fibrinous Tracheal Pseudomembrane, About a Case and Review of the Literature

OFTP: Obstructive Fibrinous Tracheal Pseudomembrane

Obstructive Fibrinous Tracheal Pseudomembrane (OFTP) is a rare condition, secondary to ischemia of the tracheal mucosa generally of iatrogenic origin in relation to traumatic endotracheal intubations, inducing abnormal growth and regeneration [1]. We report a case of (OFTP) in a 73-year-old woman, the peculiarity of our presentation lies in the non-urgent clinical picture, biopsy achievement with anatomopathological study and favorable evolution under medical treatment.

Ms. FB aged 73 admitted to the pneumology department for chronic productive cough, bringing back mucopurulent sputum associated with a stage 3 mMRC dyspnea that had been evolving for 1 month, and beginning 4 days after her hospitalization in resuscitation, with an orotracheal intubation for severe acute respiratory failure involving the life-threatening condition following severe bilateral extensive pneumonia, settling immediately after his arrival from the pilgrimage. Clinical examination showed condensation syndrome of the upper third of the left lung. C-reactive protein was elevated to 38 mg/l and white blood cells to 15,000 elements/mm3 predominantly polynuclear neutrophils at 11,000 elements/mm3. The chest scan revealed a circumferential endotracheal formation (Figure 1). Bronchial fibroscopy revealed circumferential whitish membranes attached to the right side wall of the upper third of the trachea, the rest of the tracheal duct and the bronchial shaft without abnormality (Figures 2 & 3). Anatomopathological examination of the biopsies of this formation showed a fibrinous and leukocyte product associated with a tissue of granulations, made of polymorphic inflammatory elements (Figure 4). The patient was put on systemic corticosteroid therapy (prednisolone) at the 60 mg per day dose for 10 days and a bronchoscopy check was scheduled in 1 month, which revealed a marked improvement with an almost total disappearance of the formations pseudomembrane (Figure 5), the patient reported expectorating a whitish membrane fragment one week after the end of corticosteroid treatment and there was no recurrence after 7 months of this episode.

Figure 1: Chest CT showing circumferential endotracheal formation.

Figure 2: Bronchial fibroscopy revealed circumferential whitish membranes.

Figure 3: Biopsy of the whitish pseudomembranous formation.

Figure 4: Anatomopathological examination of the biopsy of the pseudomembranous formation (coloring HE, magnification ×100).

Figure 5: Bronchoscopy check showing improvement after medical treatment.

Obstructive Fibrinous Tracheal Pseudomembrane (OFTP) is a rare but serious complication of endotracheal intubation but misidentified etiopathogenesis [2]. Post-intubation trachea iatrogenic stenosis is well known and has an incidence of 4.9 cases per million per year, OFTP is a potentially rarer and less known complication of orotracheal intubation [3,4]. The diagnosis of OFTP can be a challenge because clinical presentation is often misleading in the face of the positional and intermittent nature of dyspnea and stridor, which are the most common signs [4], it must be considered among the diagnoses evoke in front of a high-pitched stridor in post-intubation [5]. In our case, OFTP is revealed by a productive dyspnea and cough in the context of a non-urgent table, in the literature review it is found that 54% of OFTPs are discovered by acute respiratory symptoms with acute respiratory distress in 17% of the first signs occur 3.1±3 days after extubation [6]. The diagnosis is confirmed by bronchoscopy which shows a fibrinous tubular sleeve obstructing tracheal light [6]. Regarding treatment, these inflammatory lesions may regress spontaneously or under systemic corticosteroid therapy (although it has no formal recommendations), however most of these cases require the application of techniques endoscopic (rigid bronchoscopy, laser resection, ct.) [7,8], mechanical extraction of these abnormalities by bronchoscopy is performed in 85% of cases, effective in all cases without recurrence after 6-11 months of follow-up [6]. In our case, the progression is favorable without recurrence after 7 months of corticosteroid treatment without the use of an interventional bronchoscopy.

OFTP is a rare complication of orotracheal intubation, often misleading clinical presentation, confirmed by bronchoscopy which also helps guide possible endoscopic treatment which represents the most but the positive development under corticosteroid therapy is also described and this is the case with our presentation.

The doctors of pneumology department and the doctors of pathology department of the military hospital Mohamed V of Rabat who contributed to the realization of this article.

The authors declare that they have no conflicts of interest in relation to this article.