The laryngeal mask airway (LMA) is now standard airway management equipment in prehospital and Emergency Department (ED) care. Most providers may not be able to match the pediatric LMA sizes to the appropriate weights of pediatric patients. The exact inflation volumes are also difficult to memorize. To overcome this problem, we propose the following equations: Weight (kg) of patient = 2(2 x LMA...

THE LMA CTrachTM system (The Laryngeal Mask Company, Singapore) was developed from the LMA FastrachTM system (The Laryngeal Mask Company) and consists of an LMA CTrachTM airway with fiberoptic channels and a detachable liquid crystal display viewer cum light source. The LMA CTrachTM enables ventilation, glottis visualization, and tracheal intubation via a laryngeal mask conduit. In this report,...

PURPOSE To test the efficacy of the LMA in patients with previous oral or cervical radiotherapy, without upper airway obstruction. METHODS In nine patients after oral or cervical radiotherapy, efficiency of ventilation was assessed after induction of general anaesthesia and LMA insertion. Fibreoptic examination through the tube was performed to check the position of LMA. RESULTS In patients...

PURPOSE To compare the effectiveness of various laryngeal mask airway (LMA) sizes and their performance during positive pressure ventilation (PPV) in paralyzed pediatric patients. METHODS Pediatric patients (n = 158), < 30 kg, ASA 1 or 2 were studied. After paralysis, an LMA of the recommended size was inserted and connected to a volume ventilator. Fibreoptic bronchoscopy (FOB) was performed ...

OBJECTIVE Pulmonary aspiration of gastric contents occurs 20 to 30% of the time during cardiopulmonary resuscitation (CPR) of cardiac arrest due to loss of protective airway reflexes, pressure changes generated during CPR, and positive pressure ventilation (PPV). Although the American Heart Association has recommended the laryngeal mask airway (LMA) as an acceptable alternative airway for use b...

The laryngeal mask airway (LMA) was invented by Dr. Archie Brain at the London Hospital, Whitechapel, in 1981. Dr. Brain's main objective for the LMA was that it would provide a better method of maintaining a patient's airway than by face mask. Also, the LMA would be less hemodynamically stressful than with insertion of an endotracheal tube. The LMA consists of a silicone rubber tube connected ...

During general anesthesia with the laryngeal mask airway (LMA), a significant increase in cuff pressure due to diffusion of nitrous oxide through the cuff wall occurs. This descriptive clinical study was conducted in a university teaching hospital ambulatory surgical center with 100 patients (ASA physical status, I-III; age, 5 months to 76 years; weight, 5.8-146.3 kg) undergoing general anesthe...

grille, larynx seen by manipulation of the fibrescope; grade 4, epiglottis down-folded, larynx not seen. The results are shown in the Table. In five of the seven patients, the LMA provided an acceptable patent airway. In the remaining two patients (cases three and six), however, down-folding of the epiglottis caused severe airway obstruction. In case three, establishment of a patent airway via ...

With the adoption of visual instrument grading, the calculated yield grade can be used for payment to cattle producers selling on grid pricing systems. The USDA beef carcass grading standards include a relationship between required LM area (LMA) and HCW that is an important component of the final yield grade. As noted on a USDA yield grade LMA grid, a 272-kg (600-lb) carcass requires a 71-cm(2)...