What Is The Double IV Used With A Sonogram For Chemotherapy Called?

In 2013 I had stage 4 non Hodgkin lymphoma on I needed to take chemo a week at a time At one time a nurse put in what I would call a double IV It was a rectangle shape about 4 to 5 inches long and 2 to 3 inches wide the top of it was flat the bottom had 2 long needles The nurse needed to use a sonogram machine or something like it to be sure it was the two needles didn t go in a bad place. It was stuck into the top of my left shoulder it was painful from the start but my complaint was ignored. The only thing that went through it was saline solution, it was in there just over 24 hours it hurt the whole time. Anyway the saline did not circulate i m guessing, because my left shoulder, arm and hand swelled up with the saline causing a blood clot. The saline slowly had to drip out my arm over the next few weeks nobody could figure out how or why it happened. My question are you familiar with this IV system if, so what is it called. I would like to continue researching it I just don t know what it s called.