the invention no effort has been made to exhaustively describe all possible examples and embodiments of the invention thus the contents of this detailed description shall not limit the scope of the invention in any way applicant has determined that when hyaluronan is combined with a polyglycol the properties of the hyaluronan e g viscosity and lubricity will be maintained for a prolonged period of time thus polyglycols may be added to or included in various hyaluronan preparations to prolong the shelf stability and usefulness of such preparations a polyglycol is defined as a polyhydric alcohol of a monomeric glycol polyethylene glycols pegs are a family of linear water soluble polyglycols pegs are formed by polymerization of ethylene oxide the generalized formula for polyethylene glycol is using the methods of the present invention hyaluronan can be complexed with a peg to form hyaluronan preparations that remain stable at room temperature for extended periods of time e g 2 years or more without substantial chemical break down of the hyaluronan and resultant change in viscosity and lubricity in preparations of the present invention wherein hyaluronan is combined with a polyglycol e g peg the polyglycol may preferably have an average molecular weight in the range of about.