Embodiments disclosed herein relate to detection systems for an infusion pump. An occlusion detector for an infusion pump includes a membrane that deforms in response to fluid pressure in a fluid flow path branching off of the main fluid flow path of the infusion pump. The membrane deforms in response to fluid pressure, applying an axial pressure to a piston, which in turn triggers a force sensor. A controller of the infusion pump triggers an alarm or alerts a user when a threshold is reached. A bubble detector for the infusion pump includes a light emitter and reflective surface. Light shines through the fluid flow path, refracting differently if there is air present in the flow path. A light sensor detects the light and conveys an output signal to the controller. If detected air surpasses a threshold, the controller sounds an alarm or otherwise alerts the user.

A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided.

Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.

A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided.

Disclosed is a flow detector (1) for releasable coupling with a flow channel (20) in a channel coupling area and detecting a flow of liquid drug in the flow channel (20), the flow detector including: an upstream thermoelectric element (10a) and a downstream thermoelectric element (10b), wherein the upstream thermoelectric element (10a) and the downstream thermoelectric element (10b) are arranged spaced apart from each other and movable independent from each other; an upstream biasing element (15a) and a downstream biasing element (15b), wherein the upstream biasing element (15a) acts on the upstream thermoelectric element (10a), thereby biasing the upstream thermoelectric element (10a) towards the channel coupling area, and the downstream biasing element (15b) acts on the downstream thermoelectric element (10b), thereby biasing the downstream thermoelectric element (10b) towards the channel coupling area independently from the upstream biasing element (15a).

Disclosed is a supervision device (9) for supervising liquid drug flow in a flow channel (20). The supervision device (9) includes a flow detector (1), arranged for operatively coupling with the flow channel (20) and generating a flow detector signal in dependence of a flow in the flow channel (20) at a flow detection location. The supervision device (9) further includes a gas detector (8), arranged for operatively coupling with the flow channel (20) and generating a gas detector signal in dependence of whether liquid drug or gas is present in the flow channel (20) at a gas detection location at a distance upstream from the flow detection location. The supervision device (9) further includes a processing unit (90) in operative coupling with the flow detector (1) and the gas detector (8), wherein the processing unit (90) is configured to determine, based on the gas detector signal, whether non-flowing liquid drug is present at the flow detection location or a gas bubble passes the flow detector if the flow detector signal does not indicate a liquid drug flow.

An infusion pump device comprises a pump unit having an inlet and an outlet, a connector being in fluid communication with the inlet of said pump unit, a medication reservoir accommodation portion for accommodating a medication reservoir having a label or tag so that an outlet of the medication reservoir is to be coupled to said connector, and a reader which is provided at said medication reservoir accommodation portion so that the reader is adapted to read a label or tag of the medication reservoir when arranged at said medication reservoir accommodation portion.

A peristaltic infusion pump tube segment comprises a first tube portion having a surrounding wall adapted for an upstream occlusion detection, a second tube portion downstream of said first tube portion and adapted to be temporally engaged by an engagement structure, wherein said second tube portion comprises a surrounding wall being at least partly thicker than the wall of said first tube portion and made of an elastic material which allows said second tube portion to be essentially reformed at those portions which are currently not subject to the engagement by the engagement structure, a third tube portion downstream of said second tube portion and having a surrounding wall adapted for an air in line detection, and a fourth tube portion adapted for a downstream pressure detection. The peristaltic infusion pump tube segment is provided in an infusion pump device which comprises a pump mechanism configured as a peristaltic mechanism.

A method for detecting an occlusion in a fluidic channel of an infusion device that includes flowing a fluid within the fluidic channel during a first period of time in which a flow rate of the fluid is set to a first flow rate; pausing, the flow rate for a second period of time; measuring, a first pressure at a location along the fluidic channel during the second period of time; increasing, after measuring the first pressure, the flow rate to a second flow rate; pausing, the flow rate for a fourth period of time; measuring, after pausing the flow rate, a second pressure at the location during the fourth period of time; computing, at a processor, a difference between the first and second pressures; and in accordance with a determination that the magnitude of the difference satisfies the threshold, providing an indication, of a presence of the occlusion.

A fluid injector system for delivering a multi-phase fluid injection to a patient and methods of fluid delivery is disclosed. Methods of creating and using a multi-aspect fluid path impedance model of the injector system are used. Modeling and adjustment of factors that affect impedance and prevent or reduce backflow, reduce the likelihood of fluid flow rate spikes and provide more accurate flow rates and mixing ratios of fluids may be repeated or happen essentially continuously during an injection. The adjustments may be determined before the injection or determined and/or adjusted during the injection. The determination may include sensor feedback commonly used in injectors such as pressure and position feedback as well as other sensors. In all cases, the user can be notified of adjustments through on-screen notices and/or through the recordation of the injection data by a control device of the injector at the conclusion of the injection.