A bilaterally driven closed-loop artificial pancreas, includes: a detection module; an infusion module, including: a drug storage unit; a screw and a driving wheel provided with wheel teeth, the driving wheel driving the screw and the screw pushing a piston; a driving unit cooperating with the driving wheel, the driving unit including at least two driving portions; a power unit connected to the driving unit, the power unit outputting two forces in two directions on the driving unit; and a program module imported the total daily dose algorithm and the current insulin infusion algorithm. The artificial pancreas can accurately calculate the TDD value and the current insulin infusion dose, and enhance user experience.

A bilateral-driven patch-type drug infusion device comprises: an infusion unit; a driving wheel drives the screw to move by rotation, pushing the piston forward; a driving unit includes at least two driving portions, the driving unit pivots around a pivot shaft, driving different driving portions in different direction; and an infusion tube structure, which includes a base and an infusion needle, and the base includes an initial position (L), a working position (N), and an intermediate position (M). The driving unit can drive the driving wheel in two directions for infusion drug, making the infusion unit have multiple infusion modes, enhancing user experience.

Disclosed herein are systems and methods for monitoring performance of an ambulatory infusion pump. An ambulatory infusion pump can include a reservoir configured to contain a medicament including a plunger at a proximal end of the reservoir and an outlet port at a distal end of the reservoir. A motor can be configured to cause linear motion of a pushrod to contact and move the plunger to cause medicament to flow from the reservoir out of the outlet port to a patient. An optical encoder can be employed to monitor a linear position of the pushrod. In addition, the optical encoder can be employed to monitor additional system conditions and/or a secondary encoder can be employed to monitor the performance of the optical encoder.

Infusion devices, systems, and related operating methods are provided. A method of detecting an anomalous condition with respect to a fluid path based on operation of an actuation arrangement configured to deliver fluid via the fluid path involves providing input power to the actuation arrangement to produce actuation of the actuation arrangement, identifying an active amount of actuation of the actuation arrangement concurrent to the input power being provided to the actuation arrangement, disabling the input power to the actuation arrangement, identifying a passive amount of actuation of the actuation arrangement after disabling the input power to the actuation arrangement, and detecting the anomalous condition based on a relationship between the active amount and the passive amount.

An injector system for injecting fluid includes a syringe and an injector. The syringe includes a body and a plunger movably disposed within the body. The plunger has at least one flexible leg extending toward the rearward end of the body. The injector has a housing with a front plate, a drive member at least partially disposed within the housing and operable to engage the plunger, and a syringe release assembly operable to release the syringe. The syringe assembly includes a syringe release gear that forms an enclosure for receiving the syringe when the syringe is fully seated within the housing and a plunger release tube surrounding at least a portion of the drive member. The plunger release tube has a first end rotationally engaged with the syringe release gear. Rotation of the syringe release assembly releases the at least one flexible leg from the drive member.

An infusion device (1) for administering a medical fluid to a patient comprises: a receptacle (11) for receiving a syringe (2)′ a pusher device (12) movable in a pushing direction (P) for acting onto a piston (21) of a syringe (2) received in the receptacle (11), a fastening element (122) arranged on the pusher device (12) and movable in between a non-actuated position and a fully actuated position with respect to the pusher device (12), a brake device (16) for braking a movement of the pusher device (12), and a control device (17) for controlling operation of the brake device (16). Further, the infusion device (1) comprises a fastening element sensing device (173) for sensing a position state of the fastening element (122) with respect to the pusher device (12), wherein the control device (17) is configured to control the brake device (16), based on an output of the fastening element sensing device (173), to assume a braking state for braking a movement of the pusher device (12) or a non-braking state for allowing a movement of the pusher device (12).

The present disclosure relates to a method for determining syringe parameters. It encompasses, as a first step, the providing of a medical syringe pump with a syringe receptacle having a syringe inserted herein, a drive unit for a slide, a counting device for counting motor steps, at least one sensor, a control device and a storage device. The method as described herein also encompasses, as further steps, moving the slide successively at different positions corresponding to known nominal volumes of the syringe. In a further step, the difference between these two positions is determined and, finally, optionally a number of motor steps of the drive unit of the syringe pump is calculated per nominal volume unit with respect to the inserted syringe.

A drug infusion device with multiple infusion modes, includes: a reservoir (110), a piston (120) and a screw (130), the piston (120) is arranged in the reservoir (110); a driving module at least includes a first driving unit and a second driving unit that cooperate with each other, the second driving unit drives the screw (130) forward; a power module connected to the first driving unit; and a control module (101), connected to the power module, controls the power module to apply different driving powers to the first driving unit, making the first driving unit have a variety of different operating modes, thereby making the infusion device have various different infusion increments or infusion rates. The user or the system can flexibly select the infusion mode, which enhances the user experience.

An engagement mechanism associated with a reciprocally movable piston of a fluid injector is configured for releasably engaging an engagement portion at a proximal end of a rolling diaphragm syringe having a flexible sidewall configured for rolling upon itself when acted upon by the piston. The engagement mechanism has a plurality of engagement elements reversibly and radially movable relative to the engagement portion of the syringe between a first position, where the plurality of engagement elements are disengaged from the engagement portion of the syringe, and a second position, where the plurality of engagement elements are engaged with the engagement portion of the syringe. The engagement mechanism further has a drive mechanism for moving the plurality of engagement elements between the first position and the second position.

An infusion device (1) for administering a medical fluid to a patient comprises a housing (10), a receptacle (11) arranged on the housing (10) for receiving a syringe (2), a syringe driver (12) movable in a driving direction (P) for acting onto a piston (21) of a syringe (2) received on the receptacle (11), and a drive mechanism (13) for electromotively driving the syringe driver (12) along the driving direction (P), the drive mechanism (13) comprising an electric drive motor (14) and a rotatable drive element (18) operatively coupled to the syringe driver (12) for moving the syringe driver (12) along the driving direction (P). Herein, the drive mechanism (13) comprises a clutch device (16) configured, in a coupled state, to couple the drive device (14) to the drive element (18) such that the drive device (14) is operative to drive the drive element (18) and, in an uncoupled state, to uncouple the drive device (14) from the drive element (18).