Infusion method and infusion pump
First Claim
1. An infusion method of pressing an infusion tube from an outer surface thereof to supply a liquid, comprisingstationarily holding said infusion tube between holding means and a plurality of independently driven fingers which are arranged along a longitudinal direction of said infusion tube, said infusion tube having a predetermined outer diameter;
- andcontrolling the amount of discharge of the liquid to be proportional to the square of the amount of collapse of the infusion tube by individually driving said fingers to press said infusion tube from said outer surface to supply the liquid, each of the fingers being individually driven to move by an amount which eliminates an influence of a wall thickness of said infusion tube.
1 Assignment
0 Petitions
Accused Products
Abstract
According to an infusion method and pump, in order to perform infusion at a flow rate with high accuracy by allowing finger members to appropriately press a predetermined portion of an outer diameter (outer surface) of an infusion tube whose outer diameter accuracy is assured, thereby causing the infusion tube to perform a peristaltic motion, the infusion tube is stationarily held between a plurality of fingers which are arranged along the longitudinal direction of the infusion tube having a predetermined outer diameter and independently driven, and a holding means. The infusion tube is pressed from the outer surface to supply a liquid by setting a small moving amount of each finger to a degree enough to eliminate the influence of the wall thickness of the infusion tube and individually driving the fingers.
-
Citations
17 Claims
-
1. An infusion method of pressing an infusion tube from an outer surface thereof to supply a liquid, comprising
stationarily holding said infusion tube between holding means and a plurality of independently driven fingers which are arranged along a longitudinal direction of said infusion tube, said infusion tube having a predetermined outer diameter; - and
controlling the amount of discharge of the liquid to be proportional to the square of the amount of collapse of the infusion tube by individually driving said fingers to press said infusion tube from said outer surface to supply the liquid, each of the fingers being individually driven to move by an amount which eliminates an influence of a wall thickness of said infusion tube. - View Dependent Claims (2, 3, 4)
- and
-
5. An infusion pump for pressing an outer surface of an infusion tube to supply a liquid, comprising:
-
a plurality of independently driven fingers which are arranged along a longitudinal direction of said infusion tube having a predetermined outer diameter, holding means for stationarily holding said infusion tube between said fingers and said holding means, and driving means operatively associated with said fingers to individually move said fingers and control the amount of discharge of the liquid from said infusion tube by pressing said infusion tube from said outer surface through individual movement of said fingers by an amount which eliminates an influence of wall thickness of said infusion tube and such that an amount of discharge of the liquid upon collapsing the infusion tube is proportional to the square of the amount of collapse of the infusion tube. - View Dependent Claims (6, 7, 8, 9)
-
-
10. An infusion method of pressing an infusion tube from an outer surface thereof to supply a liquid, comprising
positioning the infusion tube between a surface and a plurality of independently driven fingers so that the fingers are arranged along a longitudinal direction of said infusion tube, said plurality of fingers including a first finger, a last finger and at least two intermediate fingers between the first and last fingers, said infusion tube having a wall thickness; - and
individually driving said intermediate fingers to press the intermediate fingers against the outer surface of the infusion tube to supply liquid from the infusion tube in an amount proportional to the square of the amount of collapse of the infusion tube, each of said intermediate fingers being individually driven to move by an amount which eliminates an influence of the wall thickness of said infusion tube. - View Dependent Claims (11, 12)
- and
-
13. An infusion pump for pressing an outer surface of an infusion tube to supply a liquid, comprising:
-
a plurality of independently driven fingers adapted to be positioned along a longitudinal direction of the infusion tube, said plurality of fingers including a first finger, a last finger and at least two intermediate fingers between the first and last fingers; a surface positioned in opposition to the fingers, with the infusion tube being adapted to be located between the surface and the fingers; and driving means operatively associated with said plurality of fingers to individually move each of said plurality of fingers and cause the fingers to press against an outer surface of the infusion tube to discharge liquid from the infusion tube in an amount that is proportional to the square of the amount of collapse of the infusion tube, said driving means individually driving said intermediate fingers in a manner which eliminates an influence of a wall thickness of the infusion tube. - View Dependent Claims (14, 15, 16, 17)
-
Specification