Ultrasound-guided percutaneous tracheostomy in critically ill obese patients

Pierre-Grégoire Guinot, Elie Zogheib, Sandra Petiot, Jean-Pierre Marienne, Anne-Marie Guerin, Pauline Monet, Rody Zaatar, Hervé Dupont, Pierre-Grégoire Guinot, Elie Zogheib, Sandra Petiot, Jean-Pierre Marienne, Anne-Marie Guerin, Pauline Monet, Rody Zaatar, Hervé Dupont

Abstract

Introduction: The purpose of this study was to evaluate the feasibility of ultrasound (US)-guided percutaneous tracheostomy (PCT) and the incidence of complications in critically ill, obese patients.

Methods: Fifty consecutive patients were included in a prospective study in two surgical and critical care medicine departments. Obesity was defined as a body mass index (BMI) of at least 30 kg/m². The feasibility of PCT and the incidence of complications were compared in obese patients (n = 26) and non-obese patients (n = 24). Results are expressed as the median (25th-75th percentile) or number (percentage).

Results: The median BMIs were 34 kg/m² (32-38) in the obese patient group and 25 kg/m² (24-28) in the non-obese group (p < 0.001). The median times for tracheostomy were 10 min (8-14) in non-obese patients and 9 min (5-10) in obese-patients (p = 0.1). The overall complication rate was similar in obese and non-obese patient groups (35% vs. 33%, p = 0.92). Most complications were minor (hypotension, desaturation, tracheal cuff puncture and minor bleeding), with no differences between obese and non-obese groups. Bronchoscopic inspection revealed two cases of granuloma (8%) in obese patients. One non-obese patient developed a peristomal skin infection, which was treated with intravenous antibiotics. Ultrasound-guided PCT was possible in all enrolled patients and there were no surgical conversions or deaths.

Conclusions: This study demonstrated that US-guided PCT is feasible in obese patients with a low complication rate. Obesity may not constitute a contra-indication for US-guided PCT. A US examination provides information on cervical anatomy and hence modifies and guides choice of the PCT puncture site.

Trial registration: ClinicalTrials.gov: NCT01502657.

Figures

Figure 1
Figure 1
Ultrasound sagittal view of the neck. A-M interface, air-mucosa interface; CC, cricoid cartilage; T1, first tracheal ring; T2, second tracheal ring; T3, third tracheal ring.
Figure 2
Figure 2
Ultrasound transversal view of the neck. Th, thyroid gland; TL, trachea lumen; TR, tracheal ring; V, vessel.
Figure 3
Figure 3
Real-time ultrasound guidance using an out-of-plane approach. Progression of the needle is determined by a distinct acoustic shadow (arrow). TL, trachea lumen; TR, tracheal ring.
Figure 4
Figure 4
Real-time ultrasound guidance using an out-of-plane approach. The dilator is determined by a hyperechoic signal centered by a distinct acoustic shadow (arrows). TL, trachea lumen; TR, tracheal ring; V, vessel.

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