A system for removing excess fluid from a patient with hemodilution, comprising: a urinary tract catheter (112, 114) comprising: a drainage lumen portion comprising a proximal end, a distal end configured to be positioned in a patient's urinary tract, and a sidewall extending therebetween; and a retention portion extending radially outward from a portion of the distal end of the drainage lumen portion, and being configured to be extended into a deployed position in which a diameter of the retention portion is greater than a diameter of the drainage lumen portion, wherein at least one of the drainage lumen portion or the retention portion comprises at least one drainage port to permit fluid flow into the drainage lumen; and a pump in fluid communication with a drainage lumen defined by the drainage lumen portion of the ureteral catheter, the pump comprising a controller configured to: actuate the pump to cause the pump to induce a negative pressure in a ureter and/or kidney of the patient to draw urine through the drainage lumen of the urinary tract catheter, periodically receive information representative of a hematocrit value of the patient; and if the received hematocrit value exceeds a predetermined minimum threshold value, ceasing the application of the negative pressure to the ureter and/or kidney. a urinary tract catheter (112, 114) comprising: a drainage lumen portion comprising a proximal end, a distal end configured to be positioned in a patient's urinary tract, and a sidewall extending therebetween; and a retention portion extending radially outward from a portion of the distal end of the drainage lumen portion, and being configured to be extended into a deployed position in which a diameter of the retention portion is greater than a diameter of the drainage lumen portion, wherein at least one of the drainage lumen portion or the retention portion comprises at least one drainage port to permit fluid flow into the drainage lumen; and a pump in fluid communication with a drainage lumen defined by the drainage lumen portion of the ureteral catheter, the pump comprising a controller configured to: actuate the pump to cause the pump to induce a negative pressure in a ureter and/or kidney of the patient to draw urine through the drainage lumen of the urinary tract catheter, periodically receive information representative of a hematocrit value of the patient; and if the received hematocrit value exceeds a predetermined minimum threshold value, ceasing the application of the negative pressure to the ureter and/or kidney. a drainage lumen portion comprising a proximal end, a distal end configured to be positioned in a patient's urinary tract, and a sidewall extending therebetween; and a retention portion extending radially outward from a portion of the distal end of the drainage lumen portion, and being configured to be extended into a deployed position in which a diameter of the retention portion is greater than a diameter of the drainage lumen portion, wherein at least one of the drainage lumen portion or the retention portion comprises at least one drainage port to permit fluid flow into the drainage lumen; and a pump in fluid communication with a drainage lumen defined by the drainage lumen portion of the ureteral catheter, the pump comprising a controller configured to: actuate the pump to cause the pump to induce a negative pressure in a ureter and/or kidney of the patient to draw urine through the drainage lumen of the urinary tract catheter, periodically receive information representative of a hematocrit value of the patient; and if the received hematocrit value exceeds a predetermined minimum threshold value, ceasing the application of the negative pressure to the ureter and/or kidney. actuate the pump to cause the pump to induce a negative pressure in a ureter and/or kidney of the patient to draw urine through the drainage lumen of the urinary tract catheter, periodically receive information representative of a hematocrit value of the patient; and if the received hematocrit value exceeds a predetermined minimum threshold value, ceasing the application of the negative pressure to the ureter and/or kidney.