Hydraulic device for the injection of bone cement in percutaneous vertebroplasty
First Claim
1. Hydraulic device for injection of bone cement in percutaneous vertebroplasty, that comprise four main parts, namely:
- injecting syringe, pressure exerting body, hydraulic transmission tube, an manual impulsion and fluid control syringe;
the injection syringe is a commercially available disposable 3 ml hypodermic syringe placed next to the patient;
the hydraulic tube for pressure transmission, of 1.0 m to 1.5 m length, placed between the injection syringe and the pressure exerting body;
the manual impulsion syringe placed after the hydraulic tube and near the operator, characterized by the pressure exerting body consist of hollow cylindrical body in the form of inverted syringe of larger diameter with an adapted ending like an open bolster with the largest external diameter and two diametrical opposed cuts like oval entry, also in the other end one tip of reduced diameter;
an peripheral groove in the internal wall of such bolster, couples tightly the wings of injection syringe in a revolved way;
such pressure exerting body has a movable piston on axial direction to define two chambers, namely, internal and external.
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Accused Products
Abstract
The present invention relates to the medical field, in particular relates to the practice of percutaneous vertebroplasty where a pair of syringes in the distal extreme of a lengthened hydraulic device, are united by a camera of intermediate connection of larger diameter (pressure exerting body) or modified inverted syringe tube with a bolster, a hydraulic connecting tube of flexible material that transmits the pressure of the smaller diameter manual or impulsion syringe in the proximal extreme of the device toward the intermediate cylindrical larger diameter camera (pressure exerting body), this camera is in an inverted position with regard to the first syringe (fluid control), this intermediate camera has a moving piston longitudinal to the axis of the cylinder that is controlled with the first syringe (manual) and in cooperation with the atmospheric pressure. The injecting syringe loaded with bone cement is coupled with the bolster of the body of pressure, and to the needle that drives the cement toward the interior of the bone. The intermediate camera (pressure exerting body) together with the hydraulic tube and the manual syringe form a hydraulic press system (F/A=f/a) that allows to increase in a potential way the pressure exerted in the first syringe and to make the injection of polymethylmethacrylate (PMMA) at an approximate distance of 1.0 m to 1.5 m.
243 Citations
77 Claims
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1. Hydraulic device for injection of bone cement in percutaneous vertebroplasty, that comprise four main parts, namely:
- injecting syringe, pressure exerting body, hydraulic transmission tube, an manual impulsion and fluid control syringe;
the injection syringe is a commercially available disposable 3 ml hypodermic syringe placed next to the patient;
the hydraulic tube for pressure transmission, of 1.0 m to 1.5 m length, placed between the injection syringe and the pressure exerting body;
the manual impulsion syringe placed after the hydraulic tube and near the operator, characterized by the pressure exerting body consist of hollow cylindrical body in the form of inverted syringe of larger diameter with an adapted ending like an open bolster with the largest external diameter and two diametrical opposed cuts like oval entry, also in the other end one tip of reduced diameter;
an peripheral groove in the internal wall of such bolster, couples tightly the wings of injection syringe in a revolved way;
such pressure exerting body has a movable piston on axial direction to define two chambers, namely, internal and external. - View Dependent Claims (2, 3, 4)
- injecting syringe, pressure exerting body, hydraulic transmission tube, an manual impulsion and fluid control syringe;
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5. A method of operating the device for injection of bone cement that comprises:
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to insert a bone biopsy needle in the place where the bone cement is to be delivered;
to connect the injecting syringe, loaded with the cement, in continuation of the needle;
to couple in a revolved way, the injecting syringe in the internal peripheral groove of the bolster of the pressure exerting body;
to exert pressure on the plunger of the injecting syringe by means of the force exerted in the plunger of the manual syringe placed in the other end of the hydraulic tube, this way, the content of the injecting syringe is injected in the patient'"'"'s vertebral body;
to retract the plunger of the manual syringe to withdraw the internal piston of the body of pressure in position to receive a new loaded cartridge of bone cement;
to uncouple the injecting syringe from the bolster of the body of pressure;
to disconnect the empty syringe from the needle placed in the patient'"'"'s body;
to couple the new cartridge of bone cement (injecting syringe) in the needle and bolster of the body of pressure, and repeat the previous steps to place another new cartridge of bone cement, until completing the filling of the vertebral body.
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6. A device for delivering a viscous material into a site in a patient, comprising:
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an actuator including an actuator vessel;
a delivery tube, having a first end, a second end and an inner bore, wherein the first end is coupled to the actuator; and
,a container having a connection port for connecting to the second end of the tube and an exit port. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 66, 67)
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21. A device for delivering a viscous material comprising:
- a delivery tube having a first end portion, a second end portion, and an inner bore therebetween, the first end portion adapted to contain an incompressible fluid and the second end portion adapted to contain a viscous material.
- View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of delivering a viscous material under fluoroscopy to a site in a patient comprising the steps of:
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a) providing a delivery tube containing an incompressible fluid and a viscous material, wherein the viscous material is located within the fluoroscopy field; and
b) pressurizing the incompressible fluid outside the fluoroscopy field to exert pressure on the viscous material. - View Dependent Claims (38, 39, 40, 68)
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41. A method of delivering a viscous material to a site in a patient comprising the steps of:
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a) providing a device having an actuator, a delivery tube filled with an incompressible fluid and a container;
b) filling the container with a viscous material; and
c) activating the actuator to pressurize the fluid to exert a force on the viscous material. - View Dependent Claims (69)
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42. A device for delivering a viscous material into a site in a patient, comprising:
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a) a delivery tube, having a first end, a second end and an inner bore, b) an incompressible fluid contained within the inner bore of the delivery tube, c) a container having a connection port for connecting to the second end of the delivery tube, an inner bore, an exit port, d) a viscous material contained within the inner bore of the container, and e) a separator sized to move within the inner bore of the container for separating a viscous material from the incompressible fluid.
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43. A device for delivering a viscous material into a site in a patient, comprising:
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a) a delivery tube, having a first end, a second end and an inner bore, b) a first fluid contained within the inner bore of the delivery tube, and c) a container having a connection port for connecting to the second end of the delivery tube, an inner bore, an exit port, and d) a second fluid contained within the inner bore of the container.
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44. A device for delivering a viscous material into a site in a patient, comprising:
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a) a container having a connection port for connecting to the second end of the delivery tube, an inner bore, an exit port adapted for connection to the patient, b) a separator housed within the inner bore, thereby defining a distal bore and an proximal bore, c) a first fluid contained within the proximal bore of the container. - View Dependent Claims (45)
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46. A device for delivering bone cement, comprising:
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at least one delivery chamber filled with bone cement; and
a hydraulic mechanism coupled to said delivery chamber and adapted to advance said cement out of said delivery chamber. - View Dependent Claims (47, 48, 49, 50, 51, 52)
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53. A method of hydraulic delivery of a viscous material into the body, comprising:
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(a) providing a volume with bone cement therein; and
(b) increasing pressure in said volume using a hydraulic mechanism with a working fluid other than said cement. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A device for delivering bone cement, comprising:
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(a) a delivery chamber including bone cement; and
(b) a flexibly attached pressure source adapted to increase a pressure in said delivery chamber.
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70. A device for delivering viscous material, comprising:
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a tube adapted to deliver a viscous material into a vertebra; and
a delivery system adapted to deliver said viscous material to said tube and including a relatively long conduit connecting a power application point and said tube. - View Dependent Claims (71, 72, 73, 74)
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75. A method of delivering viscous material, comprising:
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inserting a tube having an axis into a vertebra; and
attaching a delivery system of viscous material to said tube; and
applying power to advance said viscous material into said vertebra, said power being applied outside an x-ray viewing field being used for viewing said vertebra and said power being applied in a manner which does not trans-axially move said tube. - View Dependent Claims (76)
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77. A method of delivering viscous material, comprising:
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inserting a tube into a vertebra; and
selecting a force application angle relative to an axis of said tube from a set of arbitrary angles;
attaching a delivery system of viscous material to said tube; and
applying a force to advance said viscous material into said vertebra, said force being applied at said angle.
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Specification