SummaryAn intriguing case of transient language disturbance following anaesthesia is described which may throw some light on the way languages are stored in the brain. A review of the existing literature and its relevance to this unique case is discussed. The exact mode of action of anaesthetic agents remains unknown and it is possible to experience unexpected phenomena resulting from the use of general anaesthesia, whatever techniques have been employed. The following case illustrates that minor cerebral insults can result in unexpected neurological consequences that were, at least in this case, totally reversible.
Case historyThe patient was a 54-year-old Caucasian male weighing 90 kg who was the third patient on a busy arthroscopic surgery list for medial menisectomy. He had had surgery in the past and was unaware of previous significant consequences. He was fit and well and not taking any medication apart from occasional analgesics for his knee injury. His case was scheduled for mid-morning and he had been admitted at 07:00 having been nil by mouth since 23:00 the night before apart from a glass of water at 06:00. He was premedicated with ranitidine 150 mg and metoclopramide 10 mg. All routine monitoring was connected in the anaesthetic room and a cannula was inserted using local analgesia into his left hand. Anaesthesia was induced with midazolam 2 mg, propofol 180 mg and fentanyl 75 mg. After insertion of a laryngeal mask airway size 4, spontaneous respiration with oxygen 40%, nitrous oxide and isoflurane 1% was started and a diclofenac suppository 100 mg was inserted rectally. An above-knee tourniquet was applied by the surgeon and surgery lasted a total of 20 min. At the end of surgery prior to releasing the tourniquet, 10 ml of 0.5% plain bupivacaine was infiltrated into the port sites around the knee and a firm crepe bandage applied. The patient was transferred to the recovery room with a laryngeal mask in place, breathing 40% oxygen in air.Monitoring was continued in the recovery room and cardiorespiratory parameters throughout surgery and anaesthesia were stable and within normal limits at all times. Following hand-over of the patient to the recovery room staff, 10 min after the end of anaesthesia, the anaesthetist returned to the operating theatre and anaesthesia for the next patient was begun. A message was received from the recovery room nurse, who by chance was a linguist, complaining that the patient was speaking Spanish! The patient was reviewed briefly in the recovery room and it was confirmed that he was only speaking in Spanish and had not said one word of English since awakening, although he could clearly understand when spoken to in English. Nevertheless, the recovery staff were concerned that he appeared odd. All observations were still satisfactory so it was felt appropriate to await developments and the anaesthetist returned to the operating theatre to continue with the next case. The patient was now awake and self-caring (although still speaking Spanish); therefore, the ward staff were...