Abstract: Systems and apparatuses for blood oxygenation are disclosed. A system includes a first layer defining a plurality of banks of first channels each extending in a first direction. The plurality of banks of first channels are configured to receive blood via a trunk channel. The system includes a second layer defining a bank of second channels extending in a second direction. The bank of second channels are configured to receive oxygen. The first direction is different from the second direction. The system includes a membrane disposed between the first layer and the second layer and configured to cause the oxygen to permeate from the second layer to the first layer to oxygenate the blood.

Abstract: A 4-in-1 multiple socket driver has an outer hexagonal sleeve with two ends each having one of a first intermediate large and second largest hexagonal sockets. A hand grippable handle is formed over an intermediate section of the outer sleeve. An inner hexagonal shaft with two ends each having one of a third smallest and fourth intermediate small hexagonal sockets. The inner shaft is adapted to slidably fit within the outer hex sleeve while being rotationally locked to the outer hexagonal sleeve. An axial locking mechanism is provided between the outer hexagonal sleeve and the inner hexagonal shaft to selectively present two of the four hexagonal sockets at any one time for operational use and to effectively lock the inner hexagonal shaft within the out hexagonal sleeve.