Fiberoptic Evaluation of the LMA(Laryngel Mask Airway) Position During Anesthesia With Spontaneous Respiration or Controlled Ventilation in Children

Yonsei University

Status: Completed

Conditions: Pediatric Urologic Surgery

Study type: Observational

Funder types: Other

Identifiers

NCT02220075

4-2013-0550

Details and patient eligibility

About

LMA(Laryngel Mask Airway) is useful for pediatrics surgery, and there are various methods of LMA insertion. When the investigators evaluate the LMA position, the investigators can use fiberoptic bronchoscope (Grade 1 to 4). For pediatric patients, clinical signs(airway pressure<20cmH2O, expiratory CO2 level)are seen normal but the grade is 3 or 4. And this will bring high risk of aspiration. Recent studies reported the LMA position after general anesthesia induction not after operation. Therefore, the investigators will observe the LMA position three times; after general anesthesia induction, after caudal block, and after operation as well as the difference regarding to spontaneous and controlled ventilation.

Enrollment: 100 patients

Sex: All

Ages: 1 month to 7 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. ASA physical status 1 or 2,
2. pediatric patients from 1month to 7 years old
3. under general anesthesia using LMA
4. getting informed consent from the guardian

Exclusion criteria

1. difficult airway
2. airway diseases ; URI, asthma, pneumonia
3. not getting informed consent from the guardian

Trial design

100 participants in 2 patient groups

spontaneous group

Description:

maintain spontaneous breathing during the operation, and recording tidal volume, ET CO2, respiratory rate, peak airway pressure, SpO2

controlled group

Description:

controlled ventilation(tidal volume 8ml/kg, ET CO2 35\~40mmHg) during the operation, recording peak airway pressure, SpO2