Factors that break and don't break the fast

Q: Regarding this question here http://muftionline.co.za/node/4 what about the person who inhales the smoke intentionally?

Q: I was fasting one day in Ramadan and I didn't know that if one gargles and water goes down one's throat then the fast is invalid. So one day I was performing ghusl and I gargled 3 times and I may have accidentally swallowed some water. Is my fast invalid?

Q: In Ramadhan, if I perform ghusl e janaabat before zohar prayers and not before the fajar prayers, is my fast valid in this case?

Q: 

1. If a woman keeps nafal fast and she gets her menses, does her fast break?
2. Can she eat or does she have to continue her fast to get reward?
3. Secondly if her fast is broken is there any qaza of  the nafal fast?
4. If she does not keep qaza, will she be sinful or not?

Q: Is it permissible to use spray deodorants (alcohol free) while fasting? 

Q: 

1. Asthmatic pump.

2. Nabulizer.

3. Drip.

4. Vitamin injection.

5. Dialysis which sugar patients use.

6. Use of oxygen. 

Q: What is the ruling of a person that masturbated while fasting during Ramadhaan. Is it required to keep kadha of that fast?

Q: I am a dentist. A fasting patient requires urgent treatment e.g. extraction or draining abscess.

Will this be permissible while fasting? Bear in mind that an injection is required, blood flows from the extraction site, and water may be put into the patient's mouth. Will the fast need to be repeated?

Q: If you are going to have a blood test in Ramadhaan. Can you keep roza on that day?