Abstract: An apparatus for mixing a particulate material into a liquid includes a pair of variable volume receptacles interlinked by a communication passage. A combined volume of liquid and particulate material is received within the variable volumes, and the volume of the variable volumes is alternately reduced and to force the materials back and forth through the connection passage. The variable volumes may be formed from a rigid walled cylinder having a free floating piston therein, and the piston and inner diameter may have a tight, sealed gap therebetween. To load the piston into the cylinder without effecting the seals, a load apparatus may be used to depress the seals inwardly of the piston and align the piston in the cylinder.

Abstract: A device for indicating the proper fill level for unmarked syringes is disclosed. This device employs the intersection of a perpendicular defracted sheet of low power visible laser light with the barrel of the syringe being filled as the indication of the proper fill level. A method of filling syringes which employs this device to indicate fill level is also disclosed.

Abstract: An injector is disclosed for administering fluids such as medications and tissue-augmenting suspensions of collagen to laryngeal tissues. The injector includes a needle, a hollow connector tube, and a syringe receiver into which syringes of collagen or a like low-viscosity fluid are inserted. The injector is adapted for one-hand operation and the serial use of several syringes of collagen or like fluid.

Abstract: Damage to endothelial and epithelial cells subject to trauma can be substantially reduced by using a wafer of a viscoelastic material. This method is particularly useful when applied prior to ophthalic surgery, particularly intraocular lens implantation surgery. Lens implantation is facilitated by the compression of lens haptics by this delivery system.

Abstract: A disposable plastic syringe sleeve (2) is disclosed. The syringe sleeve (2) is adapted to receive the body (42) of a conventional glass hypodermic syringe (40), which glass hypodermic syringe (40) has a luer tip (44) extending therefrom. A threaded section (10) formed at one end (12) of the syringe sleeve (2) cooperates with the luer tip (44) of the glass hypodermic syringe (40) and the threads (54) on a hypodermic needle (52) to provide positive luer locking for the needle 52. An enlarged finger grip (20) with a retaining mechanism (32) is formed at the other end (24) of the syringe sleeve (2). The retaining mechanism (32) operates to retain the glass hypodermic syringe (40) in position after the syringe sleeve (2) has received the syringe body (42).