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A patient support having a deck with an adjustable length. The patient support includes a portion configured to extend the length of the deck. The hospital bed is configured to support a bariatric, large, or obese patient.

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1. A patient support comprising: a frame,a deck supported by the frame, the deck comprising at least a head section, a foot section spaced from the head section, and a seat section, the head and foot sections each being pivotable relative to the frame, the head, seat, and foot sections each having a

1. A patient support comprising: a frame,a deck supported by the frame, the deck comprising at least a head section, a foot section spaced from the head section, and a seat section, the head and foot sections each being pivotable relative to the frame, the head, seat, and foot sections each having a top surface configured to support at least a portion of a mattress,an extension assembly coupled to the foot end of the frame, the extension assembly being configured to adjust the length of the patient support,first sliding panels, the first sliding panels being coupled to opposing lateral sides of the head section and slidable relative to the head section to expand and retract a width of the head section, each of the first sliding panels having a top surface configured to support at least a portion of the mattress, wherein the top surface of each of the first sliding panels is not above the top surface of the head section of the deck, andsecond sliding panels, the second sliding panels being coupled to opposing lateral sides of the foot section and slidable relative to the foot section to expand and retract a width of the foot section, each of the second sliding panels having a top surface configured to support at least a portion of the mattress, wherein the top surface of each of the second sliding panels is not above the top surface of the foot section of the deck,wherein each of the first sliding panels includes first and second spaced-apart sliding panels coupled to the head section of the deck, and wherein a first siderail assembly is mounted to only one of the pairs of sliding panels coupled to the head section. 2. The patient support of claim 1, comprising third sliding panels, the third sliding panels being coupled to opposing lateral sides of the seat section of the deck and slidable relative to the seat section of the deck to expand and retract a width of the seat section, each of the third sliding panels having a top surface configured to support at least a portion of the mattress, wherein the top surface of each of the third sliding panels is not above the top surface of the seat section of the deck. 3. The patient support of claim 1, comprising a handle movable relative to the extension assembly between a first position in which the patient support may be adjusted between a first length and a second length, and a second position spaced from the first position, in which the length of the patient support is not adjustable. 4. The patient support of claim 1, comprising an extension locator coupled to the extension assembly and configured to provide an audible sound indicating adjustment of the length of the patient support. 5. The patient support of claim 1, wherein the extension assembly is offset from the deck. 6. The patient support of claim 1, wherein the extension assembly comprises a lock, operably coupled to the frame and to the extension assembly, the lock including a first position to fix the extension assembly with respect to the frame and a second position to enable movement of the extension assembly with respect to the frame. 7. The patient support of claim 1, wherein the extension assembly comprises a slide mechanism operably coupled to the frame and to the extension assembly, the slide mechanism enabling sliding movement of the extension assembly with respect to the frame. 8. A patient support comprising: a frame,a deck supported by the frame, the deck comprising at least a head section, the head section being pivotable relative to the frame, the head section being configured to support at least a portion of a mattress,a foot section spaced from the head section, the foot section comprising a foot deck section pivotably coupled to the deck and configured to support at least a portion of the mattress, and a length extension assembly spaced from the foot deck section and coupled to the frame, the length extension assembly configured to adjust the foot section between a first length and a second length, anda width extension assembly operably coupled to at least the head section and the foot section, the width extension assembly being configured to expand and retract the width of the patient support,wherein the foot deck section can be pivoted without affecting the position of the length extension assembly. 9. The patient support of claim 8, wherein the foot deck section is pivotable relative to the frame and the length extension assembly is slidable relative to the frame. 10. The patient support of claim 8, comprising an extension locator coupled to the length extension assembly and configured to indicate movement of the foot section to the first length by providing an audible sound when the foot section has the first length. 11. The patient support of claim 10, wherein the extension locator is configured to audibly indicate movement of the foot section to the second length. 12. The patient support of claim 8, wherein the width extension assembly includes a plurality of sliding panels configured to provide support for a support surface having a width of greater than approximately forty inches. 13. The patient support of claim 8, wherein the length extension assembly includes a first adjustment mechanism and the width extension assembly includes a second adjustment mechanism, wherein the first adjustment mechanism can be adjusted independently of the second adjustment mechanism. 14. The patient support of claim 8, wherein the length extension assembly and the foot deck section each have a top surface, and the top surface of the length extension assembly and the top surface of the foot deck section cooperate to establish a stepdown, and the stepdown is configured to provide heel pressure relief for a patient that weighs between two hundred fifty and one thousand pounds. 15. The patient support of claim 8, wherein the length of the patient support with the length extension assembly fully retracted is less than approximately ninety-one inches. 16. A bariatric patient support configured to accommodate bariatric patients of at least two hundred fifty pounds, the bariatric patient support comprising: a frame,a deck coupled to the frame to support a support surface,a foot section coupled to the deck, the foot section comprising a length extension assembly configured to adjust the foot section between a first length and a second length, and comprising a width adjustment assembly configured to adjust the foot section between a first width and a second width, the width adjustment assembly comprising panels slidably coupled to the foot section, anda controller, to control the inflation of the support surface, including a coupler to couple to the support surface, a screen displaying a plurality of user-selectable inputs including a deflate input, and a control system embodied within the controller to deflate a portion of the support surface to shorten the width of the support surface upon activation of the deflate input,wherein the foot section can be pivoted without affecting the position of the length extension assembly. 17. The bariatric patient support of claim 16, wherein the controller comprises a user interface, to receive an input from a user, and a selector responsive to the input, to control inflation of a portion of the support surface configured to support a heel of a patient. 18. The bariatric patient support of claim 17, wherein the selector causes deflation of the portion of the support surface configured to support a heel of the patient to enable the deck to be configured at the second length. 19. The bariatric patient support of claim 16, wherein the deck comprises a locator, the locator comprising a key and an aperture configured to indicate when the patient support has reached the second length. 20. The bariatric patient support of claim 16, wherein the control system displays a timer on the screen, the timer counts down a time period after the support surface has been deflated, and the control system issues an alarm indicating that the time period has expired. 21. The bariatric patient support of claim 20, wherein the support surface inflates after the time period has expired. 22. A bed comprising: a frame,a plurality of wheels movably supporting the frame,a high-low lift assembly coupled to the frame,a deck supported by the frame, the deck comprising a plurality of deck sections including at least a head section, a seat section, and a foot section,an extension assembly coupled to the frame and configured to adjust the foot section of the deck between a first length and a second length, the foot section of the deck being movable without affecting the position of the extension assembly,a handle movable relative to the extension assembly, andan extension locator coupled to the extension assembly, the extension locator comprising a pin, the extension locator being configured to provide a sound when the foot section moves to the first and second lengths. 23. The bed of claim 22, comprising a lock fixing the length of the deck section in one of the first and second lengths, wherein movement of the handle both unlocks the lock and adjusts the length of the deck. 24. The bed of claim 23, wherein the lock is lockable when the deck has the first length, the second length, and any length between the first length and the second length.