41. General anaesthesia is used only in the rare cases. 42. Among fields Pharmacia is researching are anti-cancer drugs and products for anaesthesia . 43. Starkey, 24, underwent the four-hour operation under local anaesthesia Saturday. 44. Astra, established in 1913, also makes lidocaine, a popular local anaesthesia . 45. Research has also indicated advantages in using helium oxygen mixtures in delivery of anaesthesia . 46. Some dogs may suffer from sensitivity to anaesthesia . 47. Extraglottic devices are used in the majority of operative procedures performed under general anaesthesia . 48. The first use of continuous caudal anaesthesia in a labouring woman was in 1942. 49. Sugammadex is a newer drug for reversing neuromuscular block by rocuronium in general anaesthesia . 50. All of these are done under general anaesthesia .