FLUID AND AIR HANDLING IN BLOOD AND DIALYSIS CIRCUITS
First Claim
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1. A blood priming method comprising:
- (a) running a dialysate pump to pull blood from a patient into an extracorporeal blood circuit in a first direction thereby displacing a priming liquid to a drain until or after blood is detected in the extracorporeal blood circuit; and
(b) running a blood pump to pull blood from the patient into the extracorporeal blood circuit in a second direction thereby displacing the priming liquid to the drain until or after blood reaches an air trap in the extracorporeal blood circuit.
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Abstract
An air purging method includes: (a) detecting a low fluid level in a blood circuit indicating a high amount of air in the blood circuit; (b) stopping a blood pump; (c) closing a venous patient line; (d) opening a blood circuit air vent valve and a drain valve; and (e) running the blood pump to meter air through the air vent valve and the drain valve to a drain.
17 Citations
20 Claims
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1. A blood priming method comprising:
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(a) running a dialysate pump to pull blood from a patient into an extracorporeal blood circuit in a first direction thereby displacing a priming liquid to a drain until or after blood is detected in the extracorporeal blood circuit; and (b) running a blood pump to pull blood from the patient into the extracorporeal blood circuit in a second direction thereby displacing the priming liquid to the drain until or after blood reaches an air trap in the extracorporeal blood circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A blood priming method comprising:
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(a) running a dialysate pump to pull blood from a patient into an extracorporeal blood circuit in a first direction thereby displacing a priming liquid to a dialysate circuit until or after blood is detected in the extracorporeal blood circuit; and (b) running a blood pump to pull blood from the patient into the extracorporeal blood circuit in a second direction thereby displacing the priming liquid to the dialysate circuit until or after blood reaches an air trap in the extracorporeal blood circuit. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A blood priming method comprising:
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(a) running a blood pump in a first direction to pull blood from a patient into an extracorporeal blood circuit thereby displacing a priming liquid to a container (i) for a number of pump cycles, (ii) for a given time, or (iii) until or after blood is detected in the extracorporeal blood circuit; and (b) running the blood pump in a second direction to pull blood from the patient into the extracorporeal blood circuit thereby displacing the priming liquid to the container (i) for a number of pump cycles, (ii) for a given time, or (iii) until or after blood reaches an air trap in the extracorporeal blood circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification