First of all I am dislexic and have never been great at spelling, not being a spelling bee champ is not a sign of your intelligence. You don't titrate ketamine unless you are using it to sedate a child. It is almost never used for adults in the hospital setting. either way there is always a loading dose then you titrate for maintenance. The loading dose is 1 - 4 mg per kg, this means if your patient weighs 65 pounds he is about 30 Kg so his loading dose would be anywhere from 30mg to 120mg. Most of the time the drug is used it is so we can reset a dislocation or reset a bone, both only takes a few minutes and the loading does will keep them down for anywhere from 20 mins to an hour we almost never need to what you call titrate. This drug is used mainly because it rarely causes any respiratory depression and is a very effective sedative. Rarely will you find such a powerful sedative that won't knock out the patients respiratory drive. Here are some other fun facts about K it is in the same family of drugs as PCP.
I was referring to using it recreationally, when I did it I actually cut the low end of the loading dose in half so 1/2 mg per kg. It would last about 30 mins but time is of little relevance on a drug like ketamine due to the out of body high that seems to go on much longer than 20 mins. You are right about one thing I did miss speak the truth is I used to be a medical professional and am no longer due to illness. But I assure you sir I have forgot more about emergency medicine than you will ever know.