Depends of surgery performed usualy starts with 5-10 mg until effect

Spinal or some propophol and sufenthanyl or fenthanyl with huge oxigenation should make old man feel better then awake K is up to 5 so diuresys shold be monitored

Should be wise to extubate when laringeal reflex is back

 ??? I will use it all the times instead of isoflorane. I have two vaporizers for halotan , but in Europe no supplier has halotan anymore. So some two years or more I gladly use iv sufentanyl because with isofluran it never goes smoothly as it was with halotane