Sheath for a medical device

A housing for an oximeter device comprising:

• a lid, wherein the lid comprises a first open end and a first closed end, located opposite to the first open end on the lid, and the first closed end comprises a first window;
• a body of the housing, wherein the body comprises a second open end and a second closed end, located opposite to the second open end on the body, and the second closed end comprises a second window;
• a hinge, wherein the hinge hinge-couples the lid and body of the housing, the lid comprises a back portion proximal to the hinge and a front portion distal from the hinge and the back portion;
• a pad coupled to an inside surface of the lid at the back portion of the lid;
• and
• a latch coupled to the lid at the front portion of the lid, wherein the pad is a first distance from the hinge, the latch is a second distance from the hinge, and the first distance is less than the second distance.