An infusion device (1) for administering a medical fluid to a patient (P) comprises a pumping mechanism (11) for pumping a medical fluid through a delivery line (3), and a processor device (15) for controlling the pumping mechanism (11), during an infusion operation, to pump the medical fluid through the delivery line (3) in a downstream direction (F1). Herein, the processor device (15) is constituted to perform, prior to an infusion operation, a test function during which the processor device (15) controls the pumping mechanism (11) to pump the medical fluid through the delivery line (3) in an upstream direction (F2) opposite the downstream direction (F1). In this way an infusion device is provided that supports a user, in particular a nurse, to perform an infusion operation, in particular to set up the infusion device for performing the infusion operation.

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

A sensor system capable of detecting tissue counter pressure from patients that utilize infusion pumps to administer their medication is provided. Embodiments include a retrofitted piece that is placed between the user's infusion set and pump, as well as a smart infusion set configured for measuring characteristics of a fluid traveling therethrough. Hardware is provided that couples with the sensor to store, analyze, and compare data to distinguish between normal and non-normal injection/infusion profiles. An alert system notifies the user of a malfunction within the pump, within the infusion set, or at the injection/infusion site.

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

A method for determining the status of a catheter of an implanted infusion system, where the catheter is intended to deliver a fluid composition to CSF of a patient, includes monitoring catheter pressure, developing a pressure modulation profile based on the monitored pressure, and comparing the developed pressure modulation profile to a predetermined pressure profile. The predetermined pressure profile may be a profile of cerebrospinal fluid or a bolus infusion or withdrawal profile for the catheter. A determination of catheter status, such as properly functioning, occluded or leaky, can be made based on the comparison.

A medication delivery monitoring device is disclosed. The device includes a user interface configured to receive input information, and a sensor configured to measure a plurality of fluid state parameters of a fluid delivery channel through which the medication is delivered by a vascular access device (VAD) to an infusion site region of the patient. The device also includes a processor configured to determine a state of the infusion site region based on the plurality of measured fluid state parameters and the input information, and an output device configured to provide a communication regarding the state of the infusion site region. Methods and computer-readable mediums for monitoring medication delivery are also disclosed.

A method for detecting an occlusion in an infusion line (3) connected to an infusion device (1) comprises: measuring a force (F) applied to a piston (21) by a pusher device (12) of an infusion device (1) for moving the piston (21) along a movement direction (X) into a cylindrical tube (20) in order to deliver a medical fluid from the cylindrical tube (21) towards an infusion line (3) connected to the cylindrical tube (20); calculating, from the measured force (F), a value indicative of a pressure (P) in the cylindrical tube (20), wherein for calculating said value indicative of said pressure (P) a frictional force value (F0) indicative of a friction of the piston (21) relative to the cylindrical tube (20) is taken into account; and comparing said value indicative of said pressure (P) to a threshold value to determine whether an occlusion is present in the infusion line (3). Herein, the frictional force value (F0) is determined using a mathematical model modelling the friction of the piston (21) relative to the cylindrical tube (20) in dependence on the position of the piston (21) relative to the cylindrical tube (20) along the movement direction (X) and in dependence on the velocity by which the piston (21) is moved relative to the cylindrical tube (3). In this way a method for reliably detecting an occlusion in an infusion line during an infusion process is provided.

A fluid medicament delivery device includes a patient attachment unit and a separate indicator unit. The patient attachment unit includes a housing and a fluid channel located therein, wherein at least a portion of the fluid channel includes a flexible member substantially coterminous with the housing. The separate indicator unit is adapted to be detachably coupled to the housing of the patient attachment unit and includes a first sensing element for contacting the flexible member when the indicator unit is coupled to the housing to sense a flexure of the flexible member.

A method of operating an infusion device that includes the steps of actuating a fluid transfer device, which is configured to deliver a predetermined volume during each actuation, in accordance with a delivery profile that includes a plurality of fluid transfer device actuations, determining, based on sensed pressure, whether an actual volume delivered during a fluid transfer device actuation is the predetermined volume, and adjusting the number of actuations in the delivery profile in response to the actual volume delivered differing from the predetermined volume.

Method for detecting failure including possible under or over delivery of a micropump having at least an inlet valve, a pumping chamber with an inner pressure sensor and an outlet valve, said method comprising the determination of the pump tightness via the measurement of the pressure by said inner pressure sensor in said pumping chamber at least at certain intervals when the pump is inactive and the comparison with a value of reference.