ABSTRACT
Masseter muscle rigidity (MMR), known as the ‘jaw of steel’, sometimes makes laryngoscope unusable due to the stiffness of the jaw. MMR during general anesthesia was previously considered as an early episode of malignant hyperthermia (MH). Generally, MMR occurs in the pediatric patients after induction with succinylcholine and volatile agents. However, MMR following the administration of non-depolarizing muscle relaxants is uncommon, although described in some reports. We report a case of 62-year-old male patient which developed MMR following intravenous administration of rocuronium during induction of anesthesia. Our patient was not found to be vulnerable to MH. Although fiberoptic nasotracheal intubation had been successfully performed in our case, an unanticipated difficult airway due to MMR can be experienced at any time. Therefore, we should be aware that, although rare, MMR can occur after using non-depolarizing muscle relaxant. Additionally, in case of any incident of MMR, anesthesiologists need to recognize the management of a difficult airway and to maintain adequate oxygenation in a variety of methods according to a difficult airway algorithm.
ABSTRACT
Masseter muscle rigidity (MMR), known as the ‘jaw of steel’, sometimes makes laryngoscope unusable due to the stiffness of the jaw. MMR during general anesthesia was previously considered as an early episode of malignant hyperthermia (MH). Generally, MMR occurs in the pediatric patients after induction with succinylcholine and volatile agents. However, MMR following the administration of non-depolarizing muscle relaxants is uncommon, although described in some reports. We report a case of 62-year-old male patient which developed MMR following intravenous administration of rocuronium during induction of anesthesia. Our patient was not found to be vulnerable to MH. Although fiberoptic nasotracheal intubation had been successfully performed in our case, an unanticipated difficult airway due to MMR can be experienced at any time. Therefore, we should be aware that, although rare, MMR can occur after using non-depolarizing muscle relaxant. Additionally, in case of any incident of MMR, anesthesiologists need to recognize the management of a difficult airway and to maintain adequate oxygenation in a variety of methods according to a difficult airway algorithm.
ABSTRACT
PURPOSE: To compare characteristics in patients with and without previous dacryocystitis and satisfaction after endoscopic dacryocystorhinostomy. METHODS: We retrospectively analyzed 156 eyes of 116 patients who underwent endoscopic dacryocystorhinostomy at our Hospital from May 2011 to December 2015. The patients were grouped into those with pre-operative dacryocystitis and those without dacryocystitis. Each patient group was characterized retrospectively, followed by a telephone survey regarding post-operative satisfaction. RESULTS: Fifty-eight patients (66 eyes) had dacryocystitis, whereas 58 patients (90 eyes) did not. Patients' mean age was 64.9 years old. The mean duration of symptoms in patients with and without dacryocystitis was 11 and 20 months, respectively, showing a statistically significant difference (p 0.05). Post-operative satisfaction was higher in patients with dacryocystitis, showing a statistically significant difference (p < 0.05). CONCLUSIONS: Patients with pre-operative dacryocystitis were characterized by a shorter duration of symptoms and higher post-operative satisfaction. This finding implies that post-operative satisfaction could be lower in patients without dacryocystitis, which should be noted.