Method of removing excess fluid from a patient with hemodilution
First Claim
1. A method for increasing urine output rate from a patient with hemodilution having a Glomerular Filtration Rate (GFR) of at least 30 ml/min/1.73m2 prior to treatment with the method, the method comprising:
- deploying a urinary tract catheter into the patient such that flow of urine from a ureter and/or kidney is transported within a drainage lumen of the catheter;
applying negative pressure to the ureter and/or kidney through the drainage lumen of the catheter to extract urine from the patient;
periodically measuring a hematocrit value of the patient; and
if the measured hematocrit value exceeds a predetermined minimum threshold value, providing feedback to a user or controller to determine whether to adjust or cease the application of negative pressure to the ureter and/or kidney.
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Accused Products
Abstract
A method for removing excess fluid from a patient with hemodilution is provided. The method includes: deploying a urinary tract catheter into the patient such that flow of urine from the ureter and/or kidney is transported within a drainage lumen of the catheter; applying negative pressure to the ureter and/or kidney through the drainage lumen of the catheter to extract urine from the patient; periodically measuring a hematocrit value of the patient; and if the measured hematocrit value is greater than a predetermined threshold value, ceasing the application of the negative pressure to the ureter and/or kidney. A system for removing excess fluid from a patient with hemodilution including a ureteral catheter and a pump is also provided.
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Citations
34 Claims
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1. A method for increasing urine output rate from a patient with hemodilution having a Glomerular Filtration Rate (GFR) of at least 30 ml/min/1.73m2 prior to treatment with the method, the method comprising:
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deploying a urinary tract catheter into the patient such that flow of urine from a ureter and/or kidney is transported within a drainage lumen of the catheter; applying negative pressure to the ureter and/or kidney through the drainage lumen of the catheter to extract urine from the patient; periodically measuring a hematocrit value of the patient; and if the measured hematocrit value exceeds a predetermined minimum threshold value, providing feedback to a user or controller to determine whether to adjust or cease the application of negative pressure to the ureter and/or kidney. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for increasing urine output rate from a patient with hemodilution having a Glomerular Filtration Rate (GFR) of at least 30 ml/min/1.73 m2 prior to treatment with the method, comprising:
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a urinary tract catheter 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 urinary tract 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, providing feedback to a user or controller to determine whether to adjust or cease the application of the negative pressure to the ureter and/or kidney. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification