Spanish to English Medical Medical (general) kidney failure in acute leukemia patient

This is from an article on tumor lysis syndrome and acute kidney injury. The patient had acute lymphoblastic leukemia and experienced tumor lysis syndrome after methylprednisolone treatment (complete article at: http://www.scielo.org.ar/scielo.php?pid=S0325-00752012000600...

The authors discuss the patient's case and treatment in the Discussion section:

"Nuestra paciente presentó un episodio de hipovolemia con oliguria, recibió varias expansiones y recuperó una diuresis normal, pero no fue posible **incrementarla en gama poliúrica** quizás for su diátesis hemorragica dificil de compensar, lo que probablemente contribuyó al depósito de cristales, todo lo cual refuerza la importancia de un alto flujo urinario como la mejor profilaxis y revela la dudosa utilidad de una orina alcalina." (I've written out the complete sentence in case our medical colleagues are interested in the discussion.)

How would you translate "incrementarla en gama poliúrica" here? I can guess that it's "bring her up to the polyuric range" ... but it's a guess because I don't really understand what I'm writing about here.

Thanks again for your help.