Abstract: A swivel ring surgical retractor in a generally circular form is disclosed. The retractor has a fixed portion which is attached to the operating table or other support and a portion which can swivel in relationship to the fixed portion. The swivel portion is attached to the fixed portion of the retractor with a threaded shaft which forces two sunburst clamping inserts into engagement to secure the swivel portion to the fixed portion. The swivel portion can be adjusted or removed from the fixed portion by unthreading the shaft to disengage the sunburst clamping inserts to adjust the position of the swivel portion or to remove the swivel portion from the fixed portion.

Abstract: A head clamp which includes a frame with two arms, a bracket on one of the arms capable of rotation to adjust the position of head engaging pins affixed at the ends of the arms. The bracket is rotatable but held in position by a plurality of index pins fixed in apertures in a plate and the bracket is capable of being rotated by moving the pins out of the apertures and rotating the bracket when the head engaging pins have been removed from the patient.