Syringe pump rapid occlusion detection system
First Claim
Patent Images
1. A method of automatically detecting an occlusion in a fluid line of a syringe pump, the syringe pump including a housing adapted to support a syringe containing a plunger moveable inside the syringe by pushing an end of a plunger with a pusher to expel fluid from an outlet of the syringe into a fluid line connected to the outlet and configured to carry the fluid under pressure to a patient, the method comprising:
- mounting the syringe onto the housing with the plunger end extended;
coupling the pusher to the end of the plunger;
initiating a pumping sequence to cause the fluid to flow into the fluid line;
during the pumping sequence, using a sensor to determine a first instantaneous force value F1 indicative of force in the fluid line at instantaneous time T1;
during the pumping sequence, determining a second instantaneous force value F2 indicative of force in the fluid line at instantaneous time T2; and
providing an indication of the occlusion if a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 departs from an expected slope relationship.
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Accused Products
Abstract
An apparatus, method and program product detects an occlusion in a fluid line by determining if a relationship between force measurements departs from an expected relationship.
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Citations
70 Claims
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1. A method of automatically detecting an occlusion in a fluid line of a syringe pump, the syringe pump including a housing adapted to support a syringe containing a plunger moveable inside the syringe by pushing an end of a plunger with a pusher to expel fluid from an outlet of the syringe into a fluid line connected to the outlet and configured to carry the fluid under pressure to a patient, the method comprising:
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mounting the syringe onto the housing with the plunger end extended; coupling the pusher to the end of the plunger; initiating a pumping sequence to cause the fluid to flow into the fluid line; during the pumping sequence, using a sensor to determine a first instantaneous force value F1 indicative of force in the fluid line at instantaneous time T1; during the pumping sequence, determining a second instantaneous force value F2 indicative of force in the fluid line at instantaneous time T2; and providing an indication of the occlusion if a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 departs from an expected slope relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of automatically detecting an occlusion in a fluid line of a medical pumping system, the fluid line being configured to carry fluid under pressure between a fluid source and a patient, the method comprising:
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during a pumping sequence, determining a first instantaneous force value F1 indicative of force in the fluid line at instantaneous time T1; during the pumping sequence, determining a second instantaneous force value F2 indicative of force in the fluid line at instantaneous time T2; and providing an indication of the occlusion if a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 departs from an expected slope relationship. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A syringe pumping system, comprising:
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a syringe configured to contain fluid and including an outlet; a housing adapted to support the syringe; a plunger having an end and configured to move within the syringe; a pusher adapted to attach to and push the end of the plunger so as to cause the fluid to exit out of the outlet of syringe; a fluid line connected to the outlet of the syringe and configured to carry the fluid under force to a patient; a sensor for determining at least first and second instantaneous force values F1 and F2 indicative of the force between the syringe and the patient taken at instantaneous times T1 and T2, respectively; and a processor in communication with the pusher, the processor being configured to execute program code that determines if a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 departs from an expected slope relationship. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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45. A pumping system, comprising:
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a fluid source; a fluid line configured to carry fluid under pressure between the fluid source and a patient; a sensor for determining at least first and second instantaneous force values F1 and F2 indicative of the force between the fluid source and the patient taken at instantaneous times T1 and T2, respectively; a pump configured to generate a force between the fluid source and the patient; and a processor in communication with the pump, the processor being configured to execute program code that determines if a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 departs from an expected slope relationship. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A pumping system, comprising:
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a fluid source; a fluid line configured to carry fluid under force between the fluid source and a patient; a sensor for determining at least first and second instantaneous force values F1 and F2 indicative of the force between the fluid source and the patient taken at instantaneous times T1 and T2, respectively; a pump configured to generate the force between the fluid source and the patient; and a processor in communication with the pump, the processor being configured to execute program code that initiates altering delivery of the fluid in response to determining that a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 deviates from an expected value. - View Dependent Claims (65, 66, 67)
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68. A syringe pumping system, comprising:
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a syringe configured to contain fluid and including an outlet; a housing adapted to support the syringe; a plunger having an end and configured to move within the syringe; a pusher adapted to attach to and push the end of the plunger so as to cause the fluid to exit out of the outlet of syringe; a fluid line connected to the outlet of the syringe and configured to carry the fluid under force to a patient; a sensor for determining at least first and second instantaneous force values F1 and F2 indicative of the force between the fluid source and the patient taken at instantaneous times T1 and T2, respectively; and a processor in communication with the pusher, the processor being configured to execute program code that initiates altering delivery of the fluid in response to determining that a slope calculated by dividing a difference between the second instantaneous force value F2 and the first instantaneous force value F1 by a difference between instantaneous time T1 and instantaneous time T2 deviates from an expected value. - View Dependent Claims (69, 70)
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Specification