Longitudinally extendable infusion device

Details Longitudinally extendable infusion device Longitudinally extendable infusion device

1995-10-30

1997-04-29

Millin, V.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604164, 604264, 604280, 604282, 604 53, A61M 1100

Patent

active

056243960

ABSTRACT:
A system for use in delivering a thrombolytic agent to a firm obstruction in a blood vessel by effecting longitudinal extension of the distal infusion segment of an infusion device through the obstruction as the obstruction is dissolved by the delivery of the thrombolytic agent. The infusion device is inserted into the lumen of an introducer to straighten the distal infusion segment and the assembly is advanced through a selected path in a patient's vascular system to the obstructed site. The distal infusion segment is advanced from a distal end opening of the introducer sheath lumen and assumes the pre-biased J-shaped bend configuration when positioned that tends to present the infusion port in a side wall toward the obstruction. A spring loaded assembly is coupled between the proximal ends of the infusion device and the introducer catheter that applies a force axially along the body of the infusion device against the resistance of the obstruction in contact with the distal infusion segment. As the dissolving agent is delivered and the obstruction dissolves, the distal infusion segment tunnels through the soft obstruction under the influence of the applied axial force.

REFERENCES:
patent: 4586923 (1986-05-01), Gould et al.

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