Atraumatically formed tissue compositions, devices and methods of preparation and treatment
A process and system provides for atraumatic preparation of morcelized Tissue Particles (MTPs), such as Full Thickness Skin Graft Particles (FTSGPs), cartilage particles and other organ tissue particles, in a liquid medium. The resultant tissue product may be a suspension of Tissue Particles in an aqueous solution and containing highly viable cells and may be rapidly prepared at bedside or in the operating room and conveniently delivered to a patient through a syringe or similar applicator. The MTPs may be used for surgical applications including wound healing, cosmetic surgery, and orthopedic cartilage repairs.
1. An aseptic processing device for atraumatically morcelizing tissue biopsy samples comprising:
a processing chamber for receiving said tissue biopsy samples;
an axial pin support in fixed position within said chamber;
a stationary cutting disk non-rotatably mounted on said axial pin;
a movable cutting blade rotatably mounted on said axial pin in compressive biased engagement with said cutting disk for atraumatically cutting said tissue biopsy sample therebetween in a slicing action, while maintaining tissue viability;
a retaining clip positioned on said axial pin for maintaining said cutting blade in said biased rotational engagement with said cutting disk; and
an impeller engaging said cutting blade and for rotating said cutting blade about said axial pin and for repeatedly recirculating said tissue biopsy samples between said cutting disk and said cutting blade.
2. A device of claim 1 wherein said cutting blade includes a pair of opposed cutting edges, said edges being in biased engagement with said cutting disk.
3. A device of claim 2 wherein said cutting blade includes engagement surfaces opposite said cutting edges and wherein said impeller includes contact surfaces for engagement with said engagement surfaces.
4. A device of claim 1 wherein said cutting blade includes a pair of cutting blade members each supported separately on a rigid beam.
5. A device of claim 4 wherein each said cutting blade members include a cutting edge held in compression against said cutting disk.
6. A device of claim 5 wherein said blade edges are flexible.