Total hip replacement is usually done in spinal or epidural anaesthesia and are very safe in all age groups. Having said that the fusion of spinal tissues make spinal anaesthesia difficult, but an experienced anaesthetist may put desired anaesthesia in u. Putting GA through tube is also not easy due to limited mobility of neck in some patients with ank soond. So during pre anaesthesia checks ur anaesthetist will assess u n discuss regarding which anaesthesia s best for u.

Choice of anesthesia is  with the anesthetist and not with the patient. It is a very critical phase for  the patient. Anaesthetist should be given all the information about the patient's health. Anesthesit should be given freedom to choose anesthesia for the patient.

Spinal with epidural is safest option for him. However he should be evaluvated by the anaesthesiologist in the hospital for the final decision