| 摘要 |
A closed system for harvesting fat through liposuction, concentrating the aspirate so obtained, and then re-injecting the concentrated fat into a patient comprises as its main components a low pressure cannula having between about 7 to 12 side holes of about 1-2 mm by 2.0 to 4.0 mm, a spring loaded syringe holder with one or more helicoidal springs to apply a substantially constant force over the full excursion of the plunger, and a preferably flexible collection bag which is also preferably graduated, cylindrical over most of its body and funnel shaped at its bottom, all of which are connected through flexible tubings to a multi-port valve. The multi-port valve has two flutter/duck bill valves which restrict the fluid flow to a one way direction which effectively allows the syringe to be used to pump fat out of a patient and into one or more collection bags in a continuous manner achieved with a repeated cycling of the syringe. After the bags are centrifuged to concentrate the fat, the excess fluids are separated and the valve is reconfigured into a different orientation to permit the syringe to pump the concentrated fat out of the bags to surgically graft the concentrated fat back into the patient. |
