Closed system and method for atraumatic, low pressure, continuous harvesting, processing, and grafting of lipoaspirate

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 a constant force or coiled ribbon spring to apply a substantially constant pressure 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 a collection bag in a continuous manner. After the bags are centrifuged to concentrate the fat, the excess fluids are separated and the valve is re-connected to permit the syringe pump to reverse fluid flow to graft the concentrated fat back into the patient.

主权项

1. A closed, low-pressure surgical grafting system, comprising:
a liposuction cannula having a plurality of holes, wherein the cannula is configured for insertion into a body; a repository fluidly connected to the cannula, wherein the repository is configured to receive and temporarily store a viable fat graft harvested from the body; a low-pressure suction device fluidly coupled to the cannula. for harvesting the viable fat graft from the body; and a multi-port valve having a first port in fluid connection with the cannula, a second port in fluid connection with the repository, and a third port in fluid connection with the low-pressure suction device; wherein the first port, the second port, and the third port selectively fluidly connect the cannula and the repository in parallel to the low-pressure suction device; wherein at least two of the first port, the second port, and the third port include an internal valve in the form of either a duckbill valve or a flutter valve; and wherein the low-pressure suction device is configured to generate a substantially constant pressure of about 250 mmHg to about 350 mmHg so as to inhibit damage to the fat graft and maintain viability for re-implantation.