Clinical assessment of the laryngeal tube in pediatric anesthesia
Related Experiment Video
Updated: Aug 18, 2026

The Rigid Tube as an Alternative in Controlling the Problematic Airway
Published on: June 6, 2020
Philippe Richebé1, François Semjen, Anne-Marie Cros
1Department of Anaesthesiology 3, Hôpital Saint André, Centre Hospitalier et Universitaire de Bordeaux, Bordeaux Cedex, France. philippe.richebe@chu-bordeaux.fr
Insights
The laryngeal tube (LT) is effective for pediatric airway management in children over 10 kg, with insertion success improving with operator experience. It is not recommended for children weighing less than 10 kg.
Area of Science:
- Pediatric Anesthesiology
- Airway Management Devices
- Medical Device Evaluation
Background:
- The laryngeal tube (LT) is a device used for airway management.
- Its efficacy in pediatric patients requires thorough evaluation.
Purpose of the Study:
- To assess the effectiveness of the laryngeal tube (LT) for pediatric airway management.
- To determine the success rate of LT insertion and ventilation in children.
Main Methods:
- A prospective, open-label study involving 70 pediatric patients (ASA 1).
- Evaluation of LT insertion success rates, need for additional maneuvers, and associated incidents.
- LTs were used in sizes S0-S3 for children undergoing anesthesia.
Main Results:
- Successful LT insertion and ventilation were achieved in the majority of cases, with success rates improving after the initial five insertions.
- Insertion success on the first attempt was 78.6%, with overall success rates increasing with operator experience.
- Failures in insertion or ventilation occurred in 12% of cases, with reasons including inability to achieve adequate ventilation and gastric insufflation (11.4%).
Conclusions:
- The laryngeal tube (LT) is a viable option for airway management in children weighing over 10 kg.
- Its use is not recommended for children weighing less than 10 kg.
- Success rates improve with operator training, and minimal additional maneuvers are needed for sizes 2 and 3.
Background:
The aim of this study was to evaluate a new device for airway management in children: the laryngeal tube (LT).
Methods:
The LT is available in sizes S0-S3 for pediatric anesthesia. This prospective open study included 70 children ASA 1. The local Ethics Committee approval and parental consent were collected. The primary criterion was the success rate for insertion and ventilation. Secondary criteria were additional maneuvers and incidents elicited from LT use.
Results:
Seventy children were included: S0 = 5, S1 = 8, S2 = 36, and S3 = 21. Insertion was successful: at the first attempt in 78.6%, second in 17.1%, and third or more in 4.3%. In 12% of cases it was not possible to successfully insert the LT and proceed to adequate ventilation. Failures were explained by: inability to obtain satisfying ventilation (n = 4), hypoxemia (n = 1), gastric insufflation (n = 6), cough (n = 1), and laryngospasm or stridor (n = 2), some with the same child. Minimal additional maneuvers for adequate ventilation were necessary in 35% of cases (all groups), but <20% when considering only sizes 2 and 3. Moreover, after five cases, the anesthesiologists became more proficient at inserting the LT (respectively 73.3% failure before five cases vs 13% afterwards). Gastric insufflation occurred in eight cases (11.4%). Controlled ventilation was used in 30 children and peak inspiratory pressure was 19.2 +/- 4 cmH(2)O.
Conclusions:
The LT is not recommended for children <10 kg. Over 10 kg, it provides a clear airway in most children, with a low rate of minimal additional maneuvers for sizes 2 and 3. The failure rate also decreases with the operator's training.
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