| 摘要 |
<p>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 (102) delivers fluid under pressure from a fluid source through a continuous and substantially constant flow path (106) and through a supplemental bolus dose flow path (108). A large volume bolus dose reservoir (110) accumulates a large quantity of fluid from the bolus dose flow path (108) and holds the fluid under pressure. A flow regulator (128) controls the fill rate of the large volume bolus reservoir (110). The large volume supplemental bolus dose is released from the bolus reservoir (110) upon patient activation of a valve (112). The release rate of the bolus dose is controlled by the decompression of an elastomeric sphere or spring chamber (210), 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 (302), which is capable of holding a large quantity of fluid under pressure. A plunger (314) on the bolus syringe (302) may be depressed to release a bolus dose of fluid into a chamber accumulator (318) and then to the patient at a controlled release rate.</p> |
