一种皮下可调速自动输注装置
This subcutaneous adjustable-speed automatic infusion device, which uses a micro-motor to drive a piston to move linearly within the reservoir, solves the problem of the infusion capacity and speed being unadjustable in existing devices. It enables individualized infusion and convenient home use, and is suitable for subcutaneous drug treatment of end-stage patients.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PEKING UNION MEDICAL COLLEGE HOSPITAL
- Filing Date
- 2025-03-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing subcutaneous infusion devices suffer from limitations in continuous infusion capacity, non-adjustable infusion rate, and structural and cost bottlenecks, making it difficult to meet the individualized treatment needs and home use requirements of end-stage patients.
It uses a micro motor to drive the piston to move linearly within the liquid storage chamber, enabling adjustable-speed infusion of the medicine. Combined with a transparent liquid storage chamber and an adjustable bayonet-type transfer tubing, it supports large-capacity infusion and convenient replacement, making it suitable for home use.
It enables individualized adjustment of drug infusion rate, facilitates large-volume infusion, and is portable, reducing operational complexity and cost, making it suitable for the home subcutaneous infusion needs of end-stage patients.
Smart Images
Figure CN224506007U_ABST
Abstract
Claims
1. A subcutaneously tunable rate automatic infusion device, characterized by, It includes a micro motor, a liquid storage chamber, a piston, a piston rod, an inlet pipe, and an infusion pipe; The piston is sealed to the liquid storage chamber. One end of the piston rod is fixedly connected to the outer end face of the piston, and the other end of the piston rod is detachably fixed to the output end of the micro motor. The drive speed of the micro motor is adjustable and is used to drive the piston to reciprocate linearly. An infusion tube is provided on the bottom surface of the liquid storage chamber, and a one-way valve II is provided between the infusion tube and the liquid storage chamber. An inlet tube is also provided at the bottom of the liquid storage chamber, and a one-way valve I is provided between the inlet tube and the liquid storage chamber. The inlet tube is connected to the external medication through an interface. The infusion tube is connected to the external infusion set / syringe interface through an interface.
2. The subcutaneously tunable rate automatic infusion device of claim 1, wherein, It also includes transfer tubing, including infusion tubing, interfaces, and movable clamps; One end of the infusion tube is connected to the inlet tube via an interface, and the other end of the infusion tube is directly connected to the bagged or bottled medicine via a movable latch; the movable latch can adjust its size.
3. The subcutaneously tunable rate automatic infusion device of claim 1, wherein, The liquid storage chamber shell is transparent and has scale lines on it.
4. A subcutaneously tunable rate automatic infusion device as in any of claims 1-3, wherein, The lower part of the liquid storage cavity is the liquid storage area, and the upper part is the micro motor mounting area; The upper part of the liquid storage cavity is provided with a mounting slot for installing a micro motor. The button on the micro motor is located on the upper end face. The upper end cover of the liquid storage cavity is provided with an opening, and the position of the opening corresponds to the button. The upper outer wall of the liquid storage chamber is equipped with a buckle to fix the liquid inlet pipe.
5. The subcutaneously tunable rate automatic infusion device of any one of claims 1-3, wherein, The lower end of the micro motor housing is engaged and fixed to the upper end of the liquid storage cavity; the micro motor housing is provided with a buckle for fixing the liquid inlet pipe.
6. The subcutaneously tunable rate automatic infusion device of claim 5, wherein, The upper end of the liquid storage cavity is provided with protrusions evenly distributed along the circumference, and the lower end of the micro motor housing is provided with a docking section; the diameter of the docking section is smaller than the upper diameter of the micro motor housing to form a stepped surface, and the docking section is provided with a shoulder. The upper end of the liquid storage cavity is engaged with the docking section hole of the micro motor housing, and the upper end surface of the liquid storage cavity abuts against the stepped surface. The protrusions at the upper end of the liquid storage cavity are limited by the shoulder, restricting the axial relative displacement between the micro motor housing and the liquid storage cavity.
7. The subcutaneously tunable rate automatic infusion device of claim 6, wherein, The output end of the micro motor is provided with a connecting sleeve, and the inner wall of the connecting sleeve is provided with an L-shaped groove; a limiting block is provided on the outer circumference of the piston rod; after the liquid storage cavity is engaged with the micro motor housing, the limiting block on the piston rod moves to the bottom along the vertical part of the L-shaped groove, and then the liquid storage cavity or the micro motor is rotated, the limiting block moves to the bottom along the horizontal part of the L-shaped groove, thereby limiting the axial relative displacement between the piston rod and the output end of the micro motor.