A relatively high incidence of AWR and dreams during general anaesthesia was found. Techniques without halogenated drugs showed more patients. The use of benzodiazepine premedication was associated with a lower incidence of AWR. Age, C-section with general anaesthesia, and surgery performed at night are risk factors.

La fractura de cadera es una entidad quirúrgica que se presenta principalmente en adultos mayores cuyas comorbilidades plantean un reto anestésico. Objetivo: Reportar la experiencia analgésica perioperatoria en pacientes operados de cirugía de cadera en el hospital Angeles Mocel. Material y métodos: Presentamos un estudio observacional, descriptivo y prospectivo de 14 casos intervenidos en los que se realizó bloqueo del grupo de nervios pericapsulares (Pericapsular Nerve Group, PENG por sus siglas en inglés) ecoguiado con 30 mL de ropivacaína 0.5% y en quienes se evaluó dolor referido en reposo y movimiento 20 minutos después de la administración y durante las primeras 10 horas. Resultados: Tras 20 minutos de la administración, el dolor en reposo disminuyó 25.6% y a la movilización activa 39.58% en escala ENA respecto al basal previo al bloqueo. Los pacientes se mantuvieron con dolor leve durante las primeras 10 horas posteriores. Conclusiones: El empleo del bloqueo de PENG es una alternativa eficaz para el control de dolor perioperatorio en casos con cirugía de cadera, brindando analgesia hasta por 10 horas y permitiendo la movilización temprana e inicio de rehabilitación.

Introduction: The most commonly used technique to locate the intervertebral space L3-L4 for neuraxial blockade is palpation. Objective: To determine with ultrasound the ratio of adequate location of the L3-L4 space by palpation, setting the proportion of "level above" and "below", and to evaluate the association between body mass index and inaccurate location. Methods: 100 healthy volunteers aged 18 to 75 years were studied; in the left lateral decubitus, we proceeded to locate by manual palpation the intervertebral space L3-L4 and placed a mark; without moving the patient, with the linear ultrasound probe, the processes of T12 and the top edge of the sacrum were located, and counting the spinous processes, we identifi ed the previously marked intervertebral space. Results: In 68% of the evaluations, the mark was adequate; in 75% of these, the landmark was a "level above", and in 25%, a "level below"; the greater the body mass index, the greater the inaccuracy in locating this space. Conclusions: The location of the L3-L4 intervertebral space by manual palpation had a 32% inaccuracy confi rmed by ultrasound. A higher body mass index increased the inaccuracy of the location of L3-L4 by palpation.

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