초록 ▼

This invention is an infusion pump utilizing a linear roller driven by a one or more constant force springs in combination with changeable flow regulating needles to provide a constant flow, gravity independent device. The spring constant is chosen so that infusion substantially decreases should the

This invention is an infusion pump utilizing a linear roller driven by a one or more constant force springs in combination with changeable flow regulating needles to provide a constant flow, gravity independent device. The spring constant is chosen so that infusion substantially decreases should the infusion needle become dislodged from the vein and come to rest in the surrounding tissue. Also, there is a means for introduction of an anticoagulant to maintain vein access if a delay is encountered in replacement of the infusion bag.

대표청구항 ▼

An improved infusion means comprising: a frame means having guide means associated therewith; a take-up drum means operatively associated with said guide means; at least one coil type constant tension spring means secured at one end to said frame means and unsecuringly wound about said take-up drum

An improved infusion means comprising: a frame means having guide means associated therewith; a take-up drum means operatively associated with said guide means; at least one coil type constant tension spring means secured at one end to said frame means and unsecuringly wound about said take-up drum at its opposite end; an infusion bag means containing a fluid disposed in contacting relation with and at least partially between the coils of said spring means adjacent said drum means; an infusion tube communicatively connected to said infusion bag; a fixed orifice flow regulating means operatively associated with said infusion tube; and wherein said spring means has a preselected spring constant such that said spring means applies a force to the infusion bag means to induce a pressure therein which is at least sufficient to overcome the venous back pressure thereby infusing the fluid into the vein, but is less than the force required to infuse a substantial amount of the fluid into the surrounding body tissue should the flow regulating means become dislodged from the vein and come to rest in the surrounding body tissue.