86 Year Old Woman With Inability To Pass Urine And Nausea.

86 year lady nondiabetic,hypertensive(on treatment) had presented to Apollo Emergency with inability to pass urine and nausea. Evaluation- Acute Pyelonephritis, with raised Urea, Creatinine and sever hyponatremia. Treated with Pipercilin +Tazobactum andchanged to Ertapenem and Quinolones(Prulifloxacin/Ciprofloxacin) based on C and S reports, which revealed E.Coli bactremia sensitive to Carbapenem, Aminoglycoside and Quinolones and intermediately sensitive to Piperacillin+Tazobactum.

What should be done now? Need answers quickly.