Large volume bolus device and method
6 Assignments
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Accused Products
Abstract
A device and method for the infusion of medicinal fluid at a controlled flow rate to a wound site or the blood stream of a patient is disclosed. A pump delivers fluid under pressure from a fluid source through a continuous and substantially constant flow path and through a supplemental bolus dose flow path. A large volume bolus dose reservoir accumulates a large quantity of fluid from the bolus dose flow path and holds the fluid under pressure. A flow regulator controls the fill rate of the large volume bolus reservoir. The large volume supplemental bolus dose is released from the bolus reservoir upon patient activation of a valve. The release rate of the bolus dose is controlled by the decompression of an elastomeric sphere or spring chamber, by the pressure gradient at the valve and/or by optional flow control tubing. In one embodiment, a source of fluid under pressure is pumped at a continuous and substantially constant rate to a wound site or the blood stream of a patient and into a bolus syringe, which is capable of holding a large quantity of fluid under pressure. A plunger on the bolus syringe may be depressed to release a bolus dose of fluid into a chamber accumulator and then to the patient at a controlled release rate.
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Citations
35 Claims
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1-19. -19. (canceled)
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20. A method of introducing fluid to a nerve bundle or the blood stream of a patient, comprising the step of:
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providing a catheter to a nerve bundle or the blood stream of a patient;
providing a bolus flow path for delivering a large volume bolus dose of fluid to the patient;
providing a bolus reservoir in fluid communication with said bolus flow path, said bolus reservoir being configured to expand, store and dispense fluid under pressure; and
providing a patient operable actuator to release the large volume bolus dose to the patient without the patient applying pressure to the fluid. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 33, 34, 35)
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28. A method of introducing fluid to a patient, comprising the steps of:
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providing a source of fluid under pressure;
providing a large volume bolus chamber;
providing a plunger in said chamber for dispensing the fluid in the syringe; and
providing an expandable accumulator for controlling the release rate of fluid from the chamber to the patient. - View Dependent Claims (32)
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Specification