Interlocking drug infusion device and artificial pancreas
An interlocking drug infusion device includes a drug reservoir, used for accommodating the drug to be infused, provided with a piston and a screw; a driving wheel, connected with the screw, driving the screw to push the piston forward by rotation; a driving unit, the driving unit moved in a driving direction to drive the driving wheel to rotate; an actuator, electrically connected to the driving unit, used to provide power for the driving unit in the driving direction after energized; a program module, electrically connected to the actuator, the program module providing a first driving instruction for controlling the actuator to perform periodic power output; and a position detection module, used to determine the periodic drug infusion amount. When the drug infusion amount reaches a preset threshold, the position detection module and/or the program module provide the actuator with a second driving instruction.
1 . An interlocking drug infusion device, comprising:
a drug reservoir, used for accommodating a drug to be infused, provided with a piston and a screw;
a driving wheel, connected with the screw, driving the screw to push the piston forward by rotation;
a driving unit, the driving unit moved in a driving direction to drive the driving wheel to rotate;
at least one actuator, electrically connected to the driving unit, used to provide power for the driving unit in the driving direction after energized;
a program module, electrically connected to the at least one actuator, the program module providing a first driving instruction for controlling the at least one actuator to perform periodic power output; and
a position detection module, used to determine a periodic drug infusion amount, wherein when the periodic drug infusion amount reaches a preset threshold, the position detection module and/or the program module provide the at least one actuator with a second driving instruction,
wherein the first driving instruction includes energized time T 1 and de-energized time T 2 , and the de-energized time T 2 is not less than a shortest time t required for the linear actuator to recover from deformation,
the second driving instruction includes de-energized time T 3 , and the de-energized time T 3 is not less than a shortest time t required for the linear actuator to recover from deformation.
2 . The interlocking drug infusion device of claim 1 ,
further comprising an elastic member that applies an elastic force to the driving unit to reset the driving unit.
3 . The interlocking drug infusion device of claim 1 , wherein the at least one actuator comprises
two actuators that alternately perform the periodic power output.
4 . The interlocking drug infusion device of claim 3 , wherein
each of the two actuators is a linear actuator.
5 . The interlocking drug infusion device of claim 4 , wherein the linear actuator is a shape memory alloy or shape memory polymer.
6 . The interlocking drug infusion device of claim 1 , wherein after the de-energized time T 3 , the first driving instruction replaces the second driving instruction.
7 . The interlocking drug infusion device of claim 1 , wherein after the de-energized time T 3 , the first driving instruction does not replace the second driving instruction.
8 . The interlocking drug infusion device of claim 1 , wherein
the position detection module includes a position detection element, and the position detection element detects a position through a non-contact detection.
9 . The interlocking drug infusion device of claim8 , wherein the position detection element is a magnetic element.
10 . The interlocking drug infusion device of claim 9 , wherein the position detection element is arranged in the piston or the screw or a junction of the screw and the piston.
11 . The interlocking drug infusion device of claim 10 , wherein the position detection element is provided in the piston, and the piston is provided with at least one recess for accommodating the position detection element.
12 . The interlocking drug infusion device of claim 11 , wherein the recess is provided with a plurality of projects, for fixing the position detection element.
13 . The interlocking drug infusion device of claim 12 , wherein
the recess also provides a positioning part for further fixing the position detection element.
14 . The interlocking drug infusion device of claim 1 , further comprising
an infusion mechanism module and a control mechanism module, the drug reservoir, the drive wheel, the driving unit, and the actuator are provided on the infusion mechanism module, the program module and the position detection module are provided on the control mechanism module.
15 . The interlocking drug infusion device of claim 14 , wherein the infusion mechanism module and the control mechanism module are detachable to each other, and the control mechanism module is reusable.
16 . The interlocking drug infusion device of claim 14 , wherein the infusion mechanism module and the control mechanism module are disposed in one housing, discarded together after a single-use.
17 . An artificial pancreas, comprising:
the interlocking drug infusion device of claim 16 ; and
a detection mechanism module, configured to detect blood glucose continuously, connected or integrated with the control mechanism module and the infusion mechanism module of the interlocking drug infusion device.