Height adjustable pillow for use in surgery

1. A pillow for supporting a patient's head comprising:

a casing of flexible material defining an enclosed casing volume;

a base portion of said casing having a first volume;

a support portion positioned adjacent and above said base portion and having a second volume;

an air valve attached to the casing for providing air to and from said casing volume;

filler material at least partially occupying said first volume wherein said filler material can pass from said first volume to said second volume;

said first and second volumes being compressible and expandable; and

a plate positioned below said base portion of said casing.

2. The pillow as disclosed in claim 1 wherein said base portion is formed of a first plurality of connected flexible pieces.

3. The pillow as disclosed in claim 2 wherein said support portion is formed of a second plurality of connected flexible pieces.

4. The pillow as disclosed in claim 1 wherein the filler material comprises a plurality of polystyrene beads and a plurality of plastic beads.

5. The pillow as disclosed in claim 4 wherein the ratio of polystyrene beads to plastic beads is seven to three.

6. The pillow as disclosed in claim 1 further comprising:

a headrest having a bottom surface and at least one side surface, wherein the support portion is engaged with said bottom surface of said headrest.

7. The pillow as disclosed in claim 1 wherein said casing volume is evacuated of air.

8. The pillow as disclosed in claim 1 further comprising:

an opening between said first volume and said second volume.

9. The pillow as disclosed in claim 1 wherein said second volume is expandable between a first magnitude when said support portion is devoid of filler material and a second magnitude when said support portion is filled with filler material.

10. The pillow as disclosed in claim 1 wherein said base portion is generally shaped as a partially enclosed rectangular cuboid.

11. A pillow for supporting a patient's head comprising:

a casing of flexible material defining an enclosed casing volume wherein said base portion is shaped as a partially enclosed rectangular cuboid;

a base portion of said casing having a first volume;

a support portion positioned adjacent and above said base portion and having a second volume;

an air valve attached to the casing for providing air to and from said casing volume;

filler material at least partially occupying said first volume;

said first and second volumes being compressible and expandable; and

a plate positioned below said base portion of said casing.

12. The pillow as disclosed in claim 11 wherein said filler material can pass from said first volume to said second volume.

13. The pillow as disclosed in claim 12 further comprising:

an opening between said first volume and said second volume.

14. The pillow as disclosed in claim 11 wherein said second volume is expandable between a first magnitude when said support portion is devoid of filler material and a second magnitude when said support portion is filled with filler material.

15. A pillow for supporting a patient's head comprising:

a casing of flexible material defining an enclosed casing volume;

a base portion of said casing having a first volume;

a support portion positioned adjacent and above said base portion and having a second volume;

an air valve attached to the casing for providing air to and from said casing volume;

filler material at least partially occupying said first volume wherein said second volume is expandable between a first magnitude when said support portion is devoid of filler material and a second magnitude when said support portion is filled with filler material;

said first and second volumes being compressible and expandable; and

a plate positioned below said base portion of said casing.

16. The pillow as disclosed in claim 15 wherein said filler material can pass from said first volume to said second volume.

17. The pillow as disclosed in claim 16 further comprising:

an opening between said first volume and said second volume.

18. The pillow as disclosed in claim 15 wherein said base portion is shaped as a partially enclosed rectangular cuboid.

19. A pillow for supporting a patient's head comprising:

a casing of flexible material defining an enclosed casing volume;

a base portion of said casing having a first volume and formed of a first plurality of connected flexible pieces;

a support portion positioned adjacent and above said base portion and having a second volume;

an air valve attached to the casing for providing air to and from said casing volume;

filler material at least partially occupying said first volume wherein said filler material can pass from said first volume to said second volume;

said first and second volumes being compressible and expandable;

a plate positioned below said base portion of said claim;

a first pair of side pieces of said first plurality of connected flexible pieces having a first length and a first height;

a second pair of side pieces of said first plurality of connected flexible pieces having a second length and said first height, said second pair of side pieces attached to said first pair of side pieces;

a bottom piece of said first plurality of connected flexible pieces attached to said first pair of side pieces and said second pair of side pieces;

a first top piece of said first plurality of connected flexible pieces attached to said first pair of side pieces and one of said second pair of side pieces; and

a second top piece of said plurality of connected flexible pieces attached to said first pair of side pieces and one of said second pair of side pieces.

20. The pillow as disclosed in claim 19 wherein said support portion is formed of said second plurality of connected flexible pieces comprising:

a first pair of trapezoidal pieces having a large base of a third length and a small base, said large base attached to said first pair of side pieces opposite said bottom piece;

a second pair of trapezoidal pieces having a large base of a fourth length and a small base, said large base attached to said first pair of trapezoidal pieces and said first and second top pieces; and

a third top piece attached to said first and second pairs of trapezoidal pieces.