J.Jpn. Surg. Soc.. 90(1): 82-92, 1989

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Original article

LIVER RESECTION BY WATER JET

Major problem in resecting liver parenchyma is how to control the bleeding. Recently, resection ofthe liver by water jet has been reported. So, experimental and clinical studies were performed toinvestigate the usefulness of the water jet equipment.
Ten pigs weighing around 17kg were used. The optimal pressure to resect the porcine liver was 7 to 15kg/cm². By 4 weeks the cut surface was covered with fibrous capsule. Portal angiography showed no abnormality in the resected area.
The water jet was also used in 30 human operations. The optimal pressure was 12 to 18kg/cm² for non cirrhotic liver and 15 to 20kg/cm² for cirrhotic liver. The surface immediately after jet cutting wasmore smooth than that of CUSA and histologically there was slight bleeding and necrosis. The volumeof blood loss during dissection was not different between water jet group and CUSA group. No significant changes were found in the laboratory data.
These results suggest that water jet is as useful as CUSA for cutting the liver parenchyma.

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