Embodiments of the present invention provide magnetic lancet devices and methods for driving a lancet. For example, a magnetic lancet device may include a driving mechanism having a plurality of magnets and a lancet coupled to the driving mechanism. A magnetic interaction between the plurality of magnets is configured to drive the lancet from an engaged position to a penetrating position.

A body fluid sensing device with a body fluid capture structure and a body fluid measurement sensor positioned in the body fluid capture structure. A capacitance sensor is coupled to the body fluid measurement sensor. The capacitance sensor is used to assist in the positioning of a body part relative to the body fluid capture structure.

A lancet driver is provided wherein the driver exerts a driving force on a lancet during a lancing cycle and is used on a tissue site. The driver comprises of a drive force generator for advancing the lancet along a path into the tissue site, and a manual switch for a user interface input.

A vacuum assisted lancing system for blood extraction can include a tubular body having a vacuum chamber, a lancing mechanism configured to removably couple with a lance, a vacuum mechanism including a piston slideably coupled within the body, a release mechanism for selectively holding the vacuum mechanism in an energized state, and an opening for allowing fluid communication between the vacuum chamber and an atmosphere surrounding the vacuum chamber. The system can include structure for selectively commencing dissipation of the vacuum and a fixed or adjustable depth controller. A method of manipulating a surface for blood extraction can include coupling the lancing system to the surface, blocking the opening, creating a vacuum, moving the lance coupler from a first position distal from the surface to a second position proximal to the surface, maintaining the vacuum for a period of time, and commencing dissipation of the vacuum by unblocking the opening.

A pen needle, comprising a reusable adapter configured for attachment to a distal end of a medication pen, the adapter having a proximal needle for accessing the interior of the pen injector and a fitting on the distal side for mating with a patient end needle assembly, and a disposable patient-end needle assembly having a base configured for mating with the fitting on the distal side of the adapter and a patient-end needle extending from a distal end of the base.

Sheathed cutting device. An exemplary device for discreetly piercing a skin of a patient can comprise a body having a proximal end and a distal end, a cutting member attached to a plunger, the cutting member and the plunger positioned at least partially within the body, and a biasing member configured to bias the cutting member to an initial position whereby the cutting member is positioned fully within the body, wherein the plunger is slidable into the proximal end of the body, causing the cutting member to extend from the distal end of the body.

A miniature safety blood lancet for minimizing pain includes a needle body, an activation sleeve, a housing and a spring. The activation sleeve is arranged in the housing. The needle body is arranged in the activation sleeve. The housing, the activation sleeve and the needle body are slidably connected. The activation sleeve is provided with an inner wall. The inner side of the middle of the inner wall is provided with an unlocking arm, and the outer side of the bottom of the inner wall is provided with a buckle. A needle cap is arranged at the front end of the needle body. The unlocking arm of the activation sleeve is snap-fitted with a self-locking protrusion of the needle cap and an inverted buckle of the housing, respectively. The spring is arranged between the bottom of the needle body and the housing.

A device and method are disclosed for intravenous cannulation. The device employs a spring to precisely and accurately control the force and velocity imparted to a piercing needle, with mechanical constraints built into the device to precisely and accurately control the distance through which the piercing needle travels. A sheathed-needle configuration is used with an outer, echogenic needle that can be seen via ultrasound; and an inner needle used to pierce the vein. The operator releases the piercing needle with a controlled velocity, controlled force, and controlled travel distance. The device reduces the human error and complications that have previously been associated with manually piercing a vein for cannulation.

Embodiments of the present invention provide magnetic lancet devices and methods for driving a lancet. For example, a magnetic lancet device may include a driving mechanism having a plurality of magnets and a lancet coupled to the driving mechanism. A magnetic interaction between the plurality of magnets is configured to drive the lancet from an engaged position to a penetrating position.

A blood draw device for delivery of a probe into a patient's vascular system, the blood draw device including an introducer body having a proximal end and a distal end, and an actuator. The actuator is displaceable along at least a portion of the introducer body, and the actuator is operably coupled to the probe to advance and retract the probe based on direction of displacement of the actuator. The blood draw device also includes an advancement stop member, wherein the advancement stop member is displaceable along at least a portion of the introducer body and is configured to selectively limit travel of the actuator along the introducer body.