When was Trocar embalming introduced?

Samuel Rodgers was the inventor of the trocar.He developed it in the 1870s, and patented the trocar (which is very similar to what we have today) in 1878. His method was one of introducing preservative only. In the same year, Auguste Renouard recommended in The Undertakers Manual that preservation should be preceded by aspiration. I would like to add that though chemical (cavity fluid) is added through the trocar (via a gravity feed), first the organs are aspirated of most of their blood and other fluids via a hose attached to that trocar. Suction is provided by water through the sink with a special valve. At the conclusion of the aspiration of the organs in the thoracic and abdominal cavities, the high percentage formaldehyde is introduced via a different hose attached to the trocar and screwed onto the bottle of cavity fluid.