The main treatment of heavy metal poisoning is termination of exposure to the metal. Treatment also consists of the use of various chelating agents that cause the toxic (poison) element to bind with the drug and be excreted in the urine.
Sometimes they will say, quÃ© pasa, que pasÃ³, or que te pasÃ³ to mean what's wrong or what happened. If you're trying to say what's up, I would recommend quÃ© ondas, quÃ© tal, que haces - this one meaning what are you doing. If you have any other Spanish questions feel free to ask.
El peor oso Hereâs an example of oso with the verb pasar: Me hiciste pasar por el peor oso de mi vida, amiga. You just made me go through the most embarrassing experience of my life.