Abstract: Seat belt web retractors and associated systems and methods are described herein. Web retractors assemblies configured in accordance with various embodiments of the present technology can include, for example, a frame having a first sidewall and a second sidewall opposite the first sidewall, and a spring-loaded shaft extending between the first and second sidewalls. The web retractor can further include a locking mechanism positioned proximate to the first sidewall of the frame and operably coupled to the shaft. The locking mechanism can include a vehicle inertia sensor and/or a web inertia sensor. A cover can enclose the locking mechanism such that the cover and the first sidewall form a liquid-sealed enclosure around the locking mechanism.

Abstract: A lancet comprises a body and a shaft. The body has an end face and a bore. The shaft is secured to the body and extends through the bore such that a distal section of the shaft extends outwardly from the end face of the body. The distal section has an axial slot that extends through the distal end of the shaft to form a first and a second protrusion. The first and second protrusions each have a spike on the end thereof.

Abstract: An endcap for a vacuum-assisted lancing device has a contoured skin-contact surface for placement against a skin surface. The skin-contact surface has a contour that gradually progresses from a skin-contact edge toward an inner wall of the endcap, with the diameter of the skin-contact surface at the skin-contact edge being greater than the diameter of the skin-contact surface at the inner wall of the endcap.