Patient support surface pneumatic system

The patient support apparatus of claim 1, further comprising:

• an x-ray cassette sleeve in the support surface,
• a heel support mechanism built into a foot end of the support surface,
• an electronics enclosure positioned within the support surface, wherein a wire extends from the electronics enclosure and is grounded, wherein an overmold is formed on the wire, wherein a terminal extends from the wire through the overmold to provide a ground test point,
• a support surface outlet port extending through the support surface and in fluid communication with an outlet port of a blower assembly, the support surface outlet port having a lip to facilitate preventing the ingress of fluids into the support surface outlet port,
• a flexible substrate positioned above the at least one support element,
• a first conductive trace carried by the flexible substrate,
• a second conductive trace carried by the flexible substrate adjacent to the first conductive trace, wherein an open circuit is formed between the first conductive trace and the second conductive trace when the flexible substrate is dry, wherein the presence of a threshold amount of liquid on the flexible substrate forms a closed circuit with the first conductive trace and the second conductive trace due to the flexible substrate being wet,
• an end of life indicator to indicate when the support surface has reached an end of a useful life of the support surface, and
• an interface on a side of the support surface, the interface including a dial to select a patient weight range, wherein a plurality of bladders within the support surface are inflated or deflated to adjust the support surface according to a patient weight range selected with the dial, wherein the interface includes the end of life indicator,
• wherein the blower assembly includes:
• a blower housing having a base that forms a vacuum chamber and a top cover sealed to the base to create a pressurized chamber,
• a blower having an inlet and an outlet, the inlet sealed to the vacuum chamber, the outlet in flow communication with the pressurized chamber, and
• a pair of inlets in flow communication with the vacuum chamber.