Rotary motor based transdermal injection device

Inventors

Dyer, Robert J. • Tappan, Carl • VanWyk, Eric

Assignees

Portal Instruments Inc

Abstract

An apparatus for injectate delivery includes a cartridge, a linear actuator, a rotary motor mechanically coupled the actuator, and a controller coupled to the motor. The controller controls a linear motion of the actuator by controlling an electrical input supplied to the motor in a first interval during which the motor is stationary with the linear actuator engaged with the cartridge to displace an injectate in the cartridge, a second interval following the first interval during which the controller accelerates the motor from stationary to a first speed selected to create a jet of the injectate from the cartridge with a velocity sufficient to pierce human tissue to a subcutaneous depth, a third interval during which the controller maintains the motor at or above the first speed, and a fourth interval during which the controller decelerates the motor to a second speed to deliver the injectate at the subcutaneous depth.

Core Innovation

The invention is an apparatus for injectate delivery that includes a cartridge containing a volume of an injectate and an exit port, and a linear actuator configured for delivery of the injectate from the exit port, where the linear actuator includes a linkage. A rotary motor is mechanically coupled to the linkage, and an injection controller is coupled to the rotary motor to control linear motion of the linear actuator in response to a control signal by controlling an electrical input supplied to the rotary motor.

The controller is configured to execute a first interval, a second interval, and a third interval to drive the device. During the first interval, the rotary motor is engaged with the cartridge to displace the injectate therefrom, during the second interval the controller drives the rotary motor to maintain a jet of the injectate at or above a first speed selected to create a channel through human tissue to a subcutaneous depth, and during the third interval the controller drives the rotary motor at a second speed less than the first speed and maintained within a range selected to deliver the volume of the injectate at the subcutaneous depth.

The apparatus further includes a sensor system configured to detect when the apparatus is properly positioned to deliver the injectate to a patient, and the controller is configured to prevent injection when a position of the apparatus relative to the patient is incorrect. The rotary motor is limited by a power requirement such that it provides sufficient power for the jet of the injectate to reach the first speed in not more than three rotations of the rotary motor.

Claims Coverage

The partial content provides one independent claim. It centers on a cartridge-and-actuator injectate delivery apparatus with three controller-controlled rotary-motor intervals, sensor-based positioning detection with injection prevention, and a rotational power-response constraint.

The coverage focuses on three controller-controlled rotary-motor intervals to displace injectate, create a channel through human tissue to subcutaneous depth, and then deliver the volume at that depth; sensor-based detection of proper positioning with injection prevention when positioning is incorrect; and a power-response constraint limiting how quickly the jet reaches the first speed.

Stated Advantages

Documented Applications