Ambulatory syringe-pusher device for parenteral injections with output servo-controlled by the contents of the syringe
First Claim
1. In a syringe-pusher device having a syringe for containing a volume of material therein for injection for ambulatory treatment, said device employing a coaxial D.C. motor, a reduction gear including an endless screw, an improved system for distributing a plurality of elementary volumes or boluses separated in time by periods of relaxation in response to the rotation of said screw which comprises means for operating said motor for providing an output corresponding only to the height of material of indifferentiated type introduced into said syringe prior to injection, and servo-control means responsive to said output for operating said motor at times separated by said periods to control the mean output of said material injected by said syringe.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention relates to a syringe-pusher device for ambulatory treatment, automatically delivering in a constant time compatible with the circadian rhythms, a fixed number of elementary volumes varying as a function of the prior filling volume of the syringe used by the operator. Said volume generally corresponding to the daily dose of drug can be directly read on the graduations on the syringe. A sound alarm is set off in the event of an impediment to the flow of the fluid as well as in the event of the untimely injection of elementary volume outside the set program.
-
Citations
20 Claims
- 1. In a syringe-pusher device having a syringe for containing a volume of material therein for injection for ambulatory treatment, said device employing a coaxial D.C. motor, a reduction gear including an endless screw, an improved system for distributing a plurality of elementary volumes or boluses separated in time by periods of relaxation in response to the rotation of said screw which comprises means for operating said motor for providing an output corresponding only to the height of material of indifferentiated type introduced into said syringe prior to injection, and servo-control means responsive to said output for operating said motor at times separated by said periods to control the mean output of said material injected by said syringe.
Specification