Abstract: A guarded surgical knife handle includes a lower handle portion, an upper handle postion, and a button. The lower handle portion includes a blade holder, a proximal pair of lateral shelves, and a distal pair of lateral shelves. The upper handle portion includes a guard portion, a proximal post between the proximal pair of shelves with a first widened post portion wider than the lateral spacing between the shelves, and a distal post between the distal pair of shelves with a second widened post portion wider than the lateral spacing between the shelves. The button has a button waist narrower than the second lateral spacing and a widened button portion below the button waist wider than the second lateral spacing. A bias member connected to the button and at least one of the handle portions provides an upward force on the button.

Abstract: A closure for sealing the open end of body fluid collection, transport or storage containers or tubes. The closure includes a ball and socket arrangement, wherein the ball rotates within the socket to align a passageway through the ball with the opening in the tube. To close the closure, a tab or protrusion extending from the ball is pushed to rotate the ball and orient the passageway perpendicular to the opening of the tube. When the closure is in the closed position, the ball and socket form a liquid tight seal to prevent liquid in the tube from leaking out of the tube, evaporating or being contaminated.