INJECTABLE DRUG DELIVERY ARRANGEMENT WITH CONTROLLED DELIVERY CANNULA POSITION RELATIVE TO POINT OF DELIVERY

摘要

A cannula for administration of a medicine to a target location includes a tube with at least one nodule disposed along the circumferential surface and spaced at a defined distance from the distal end of the tube. An arrangement for delivery of a medicine to a target location includes the cannula and a pump fluidly coupled to the cannula. The distal end of the cannula may be inserted into a target location until the nodule reaches a surface that limits a depth of penetration before delivery of the medication.

主权项

1. A method of delivering a medicine to a target location, the method comprising the steps of:
positioning a distal end of a cannula for insertion into a first tissue, the cannula including a steel tube defining a proximal end and the distal end of the cannula and a nodule welded along an outer circumferential surface of the steel tube and spaced at a defined distance from the distal end, the steel tube having a constant circular cross-section defining a circumference and a lumen extending between the proximal and distal ends, said nodule extending less than about the entire circumference of the tube, inserting the distal end of the cannula into the first tissue, advancing a portion of the tube through the first tissue, penetrating the nodule through the first tissue while advancing the tube through the first tissue, continuing to advance the tube through the first tissue to position the distal end of the cannula for insertion into the target location, inserting the distal end of the cannula into the target location, and delivering the medicine to the target location through the lumen.