An injection sensing device (ISD) (e.g., wearable patch) is paired with an external device (e.g., a medication delivery pen and/or smart phone, iPad, computer) via wireless link or wireline connection. The ISD senses fluctuations in local skin temperature during an injection and provides to the external device captured data from the sensor relating to medicine delivery to a patient to ensure complete delivery and minimize MDD misuse or malfunction or inaccuracies in dosing. The ISD or external device can use captured data and corresponding time stamps to determine flow informatics such as flow rate, total dose delivered, and dose completion status. An LED on the ISD indicates delivery in progress and/or delivery completion.

A system and method for calibrating an IV pump infusion system tube comprises a fluid source, an infusion system comprising, an IV pump, a drive unit, a chamber with known constant volume, a control unit, and IV tubing with a known inner diameter tolerance, and a switch and magnetic floating object. The system administers medicinal fluid, calculates the flow rate of the medicinal fluid in the chamber by measuring the time the switch is activated as medicinal fluid rises in the chamber, compares the calculated flow rate with a set flow rate of the IV pump input in the control unit prior to infusion, and adjusts the IV pump and flow rate based on the compared deviations for more accurate delivery to a patient. This configuration may provide a more precise delivery rate of medicinal fluid, preventing harm to the patient and waste of medicine.

Various systems and methods for detecting air in a chamber of an infusion system are disclosed. In one embodiment, a determination is made that air is contained in the chamber on the basis of a change in the average force exerted against the plunger utilizing a derivative spike for event detection and a systematic reduction in the average force to confirm the nature of the change. In another embodiment, a determination is made that the chamber contains air when a difference between the current force profile and a baseline force profile crosses a threshold. In an additional embodiment, a force profile is classified as being an air force profile or a liquid force profile based on extracted features of the force profile.

This disclosure includes an apparatus for detecting mating of a cap with a fluid delivery device having a housing, a receptacle, and a sensor. The housing is configured to carry an insulin delivery device having a reservoir of the fluid. The receptacle is provided by the housing having a coupling with a locking recess configured to receive a cap with a sprung locking arm. The pressure sensor is carried by the receptacle proximate the coupling and configured to detect engagement force of the sprung locking arm with the receptacle when mated with the housing. A method is also provided.

A medical fluid therapy system having a multi-state alarm feature is disclosed. An example medical fluid therapy system includes a pumping apparatus configured to pump a medical fluid from a fluid container. The example system also includes a processor configured to generate a first alarm signal associated with a first low level event of the medical fluid in the fluid container, generate a second alarm signal associated with a second low level event of the medical fluid in the fluid container, and receive an activation of a snooze element for deactivating the first alarm signal after the first low level event has occurred and enabling the second alarm signal to be activated upon occurrence of the second low level event. The system further includes a server configured to receive and route at least one of the first alarm signal or the second alarm signal for display at a user device.

A therapeutic substance delivery apparatus includes a housing, a reservoir for holding a therapeutic substance disposed at least partially within the housing, a position sensor having at least three states, a plunger which is slidable within the reservoir, and a plunger-sensor engagement interface coupled to the plunger within the reservoir and extending from within the reservoir to outside of the reservoir. The plunger and the position sensor are arranged such that the plunger-sensor engagement interface causes the position sensor to change states as the plunger slides within the reservoir. Control circuitry identifies a new state indication of the apparatus based on (a) a change in state of the position sensor, or (b) a previous or current state of the apparatus in combination with a threshold amount of time having elapsed without the position sensor changing state. Other applications are also described.

Bubble traps for use in medical fluid lines and medical fluid bubble trap systems are disclosed herein. In some embodiments, the bubble trap is configured to trap gas (e.g., air) that flows into the bubble trap from a fluid line. In some embodiments, the bubble trap includes an inlet and an outlet and a chamber between the inlet and the outlet. For example, in some embodiments, the bubble trap is configured to inhibit gas from flowing into the outlet once gas flows into the chamber from the inlet. In some embodiments, the bubble trap is in fluid communication with a source container, a destination container, and/or a patient.

A medical device system. The system includes a first medical device, a first remote interface, and a second remote interface in communication with the first remote interface and the first medical device, wherein the first medical device sends a command to the first medical device through the second remote interface, and wherein when the second remote interface receives the command, the command must be confirmed by the second remote interface before the command is send by the second remote interface to the first medical device.

A red, green, and blue values for a fluid are received. A standard red, green, and blue values for the fluid are determined. A tolerance red, green, and blue values are determined for the fluid based on the standard red, green, and blue value for the fluid. An updated red, green, and blue values for the fluid are received. Whether any of the updated red, green, and blue values for the fluid are outside of the associated tolerance red, green, and blue values for the fluid is determined.

A system to detect occlusion of an intravenous catheter may include a housing, which may include a distal end configured to couple to a proximal end of a catheter adapter and an inner lumen forming a fluid pathway. The system may also include a wave transmitter, a transducer disposed within the fluid pathway, a processor coupled to the transducer, and an indicator unit coupled to the processor. The wave transmitter may transmit energy waves along a length of an intravenous catheter of the catheter adapter. The processor may receive an electrical signal corresponding to the portion of the energy waves that are reflected back from the intravenous catheter and may determine a difference between the electrical signal and a baseline signal. In response to the difference between the electrical signal and the baseline signal meeting a threshold value, the indicator unit may alert a user.