Abstract: A vessel harvesting device includes a handle and a cannula assembly extending distally from the handle. The cannula assembly includes an outer tube having a flange, and at least one insert extending within the outer tube. The at least one insert defines a tool path configured to receive a surgical tool therethrough, a scope path configured to receive a surgical scope therethrough, and an insufflation channel. The device further includes a cannula gasket disposed within the flange of the outer tube and defining a plurality of apertures each in alignment with one of the tool path, the scope path, and the insufflation channel. The device further includes an insufflation tube extending from the handle through cannula gasket and the insufflation channel.

Abstract: Improvements to chemical reaction systems provide for the production of commercial quantities of chemical products, such as chemical powders. The improved chemical reaction systems can accommodate a large reactant flux for the production of significant amounts of product. Preferred reaction systems are based on laser pyrolysis. Features of the system provide for the production of highly uniform product particles.

Abstract: A particle collection apparatus has a chamber, one or more filters and a back pressure system. The filters are located in the flow path through the system to collect the particles from an input gas stream. The back pressure system applies a pulse of gas against the flow through the system to dislodge particles collected on the filters. The dislodged particles fall to a particle drain where they are removed from the system. The particle collection apparatus can be connected to a particle synthesis apparatus. The particle collection apparatus and the particle synthesis apparatus can operated at reduced pressures.