Jon,
Since you feel so strongly about these issues, it would be a good idea for you to formulate an Advance Directive. There are several websites where you can get this information, forms and instructions on filling out the state specific documents. Here's a few: www.choicesindying.com ; www.dyingwithdignity.ca ; www.compassionindying.org ; www.agingwithdignity.org .
The Aging With Dignity site has the "Five Wishes" documents available and an instructional video. It's pretty comprehensive documentation that will probably cover all your concerns.
Many people are concerned with these "end of life" issues and it is important to document your concerns and wishes about your health care before an issue arises.
Thank you for bringing up this important issue.