Constant pressure syringe for surgical use
First Claim
1. A syringe driver device, comprising:
- a housing for engaging a body of a syringe, wherein the housing extends along an axis that is parallel to the body of the syringe when the syringe is engaged with the housing, and wherein the housing includes an opening in a side of the housing extending along the axis of the housing;
a bracket for engaging a plunger of the syringe, wherein the bracket extends through the opening in the housing transverse to the axis of the housing; and
a spring attached to the bracket, the spring being biased to move the bracket and thereby withdraw the plunger from the body of the syringe at a constant force.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
38 Citations
23 Claims
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1. A syringe driver device, comprising:
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a housing for engaging a body of a syringe, wherein the housing extends along an axis that is parallel to the body of the syringe when the syringe is engaged with the housing, and wherein the housing includes an opening in a side of the housing extending along the axis of the housing; a bracket for engaging a plunger of the syringe, wherein the bracket extends through the opening in the housing transverse to the axis of the housing; and a spring attached to the bracket, the spring being biased to move the bracket and thereby withdraw the plunger from the body of the syringe at a constant force. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device comprising:
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a syringe having a proximal end and a distal end; a plunger slidably received within a body of the syringe and having a first end and a second end, wherein the second end of the plunger extends beyond the distal end of the syringe body; a housing engaging an outer surface of the syringe body, wherein the housing includes a first opening and a second opening positioned on substantially opposite sides of the syringe body; a bracket engaging the second end of the plunger beyond the distal end of the syringe body, wherein the bracket extends transverse to the syringe body and extends through the first opening and the second opening; wherein the bracket is moveable between a first position in which the first end of the plunger is adjacent to a proximal end region of the syringe and a second position in which the first end of the plunger is adjacent to a distal end region of the syringe; and a spring connected to the bracket and extending to a distal region of the housing, wherein the spring is configured to move the bracket from the first position to the second position at a constant force. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A device comprising:
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a housing located at a proximal region of the device, wherein the housing is dimensioned to receive a distal portion of a syringe, and wherein the housing extends along an axis that runs parallel to the syringe when engaged with the housing, and wherein the housing includes a slot formed in a side of the housing; a bracket slidably connected to the housing, wherein the bracket extends transverse to the axis of the housing and includes a gripping portion that extends through the slot; a spring operably coupled to the bracket and extending from the bracket to a distal region of the device; and a casing located at the distal region of the device, wherein the casing contains at least a portion of the spring, wherein the bracket is slidable between a proximal region and a distal region of the housing, and the spring is configured to apply a substantially constant force on the bracket to slide the bracket from the proximal region to the distal region of the housing. - View Dependent Claims (17, 18, 19, 20)
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21. A syringe driver device, comprising:
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a syringe; a housing engaging a body of the syringe, wherein the housing includes a first longitudinal slot extending along the housing and positioned on a first side of the syringe, and wherein the housing includes a second longitudinal slot extending along the housing and positioned on a second side of the syringe, opposite the first side; a bracket engaging a plunger of the syringe, wherein the bracket extends transversely through the first longitudinal slot and the second longitudinal slot; and a spring attached to the bracket, the spring being biased to move the bracket and thereby withdraw the plunger from the body of the syringe at a constant force.
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22. A device comprising:
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a syringe having a proximal end and a distal end; a plunger slidably received within a body of the syringe and having a first end and a second end, wherein the second end of the plunger extends beyond the distal end of the syringe body; a housing engaging an outer surface of the syringe body, wherein the housing includes a longitudinal slot extending along an axis of the housing substantially parallel to an axis of the syringe, wherein the slot forms an opening through a side of the housing; a bracket that extends along an axis transverse to the axis of the housing and the axis of the syringe, wherein the bracket engages the second end of the plunger beyond the distal end of the syringe body, wherein the bracket extends transversely through the longitudinal slot; wherein the bracket is moveable between a first position in which the first end of the plunger is adjacent to a proximal end region of the syringe and a second position in which the first end of the plunger is adjacent to a distal end region of the syringe; and a spring connected to the bracket and extending to a distal region of the housing, wherein the spring is configured to move the bracket from the first position to the second position at a constant force.
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23. A device comprising:
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a syringe; a housing located at a proximal region of the device, wherein the housing receives a distal portion of the syringe and extends substantially parallel to a longitudinal axis of the syringe; a first longitudinal slot extending along a first side of the housing; a second longitudinal slot extending along a second side of the housing such that the syringe is positioned between the first longitudinal slot and the second longitudinal slot; a bracket engaging a plunger of the syringe and slidably connected to the housing along an axis transverse to the longitudinal axis of the syringe, wherein the bracket includes a gripping portion that extends transversely through the first longitudinal slot and the second longitudinal slot and projects out from the first longitudinal slot and the second longitudinal slot; a spring operably coupled to the bracket and extending from the bracket to a distal region of the device; and a casing located at the distal region of the device, wherein the casing contains at least a portion of the spring, wherein the bracket is slidable within the first longitudinal slot and the second longitudinal slot between a proximal region and a distal region of the housing, and the spring is configured to apply a substantially constant force on the bracket to slide the bracket from the proximal region to the distal region of the housing.
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Specification