  Endoscopic endonasal surgery is a minimal invasive surgery that has been used
to dissect pituitary gland tumour via curettes with the help of endoscope.
However, this type of surgery has a high risk of failure because curettes may
cause damages to blood vessels and optical nerves that lead to more
complication for the patient. The aim of this study is to develop a new
technique to dissect the tumour by using liquid jet. A series of experimental
tests have been performed on animal tissue to study the effect of liquid
pressure and nozzle diameter on dissecting and cutting the tissue. Continuous /
pulsed liquid jet used with variable nozzle diameters, distances, pressures and
angles. The study concluded with promising results on liquid jet to dissect
hypophysis tumour and preserving fine blood vessels and optical nerve located
near the pituitary gland. Index Terms-Endoscopic endonasal surgery, tumour
removal, liquid jet, continuous and pulsed jet
