Need Expert Medical Opinion...

Hello,

I was really touched by reading an article today about a 20 year old
girl dying from a potassium issue after surgery, and I really need
someone more knowledgeable than me to answer a few questions if
possible. Article is below:

Aspiring singer died in freak medical accident after operation
http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2006/05/05/njaw05.xml&s***=/news/2006/05/05/ixhome.html

My Questions:

-Why would you ever after surgery check blood pressure by putting a
line in a vien? Isn't blood pressure always checked by cuff?

-Why would anyone give a potassium by IV for a "slight imbalance"
considering the risks? Wouldn't this only be done in an emergency
situation?

-How does a central line "accidentally" get up into the heart??

-And finally, is the coroner right in that it was a "freak accident",
or is he simply trying to cover up someone elses grave negligence?

Thanks in Advance!

Thomas

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