Pneumatic retinopexy injector
First Claim
Patent Images
1. A retinopexy injector means comprising:
- syringe hand tool means for manipulation and placement by the hands of a surgeon to inject a gaseous substance into a specific location in a patient'"'"'s eye to produce a gas bubble to assist in holding a partially detached or damaged retina in position for treatment, the syringe hand tool means including an injection needle connected in fluid communication directly to one end of a syringe case having an interior wall within which a piston means is movable between a first position and a second position nearer the injection needle, the piston means including a piston head in sealing contact with the interior wall of the syringe case, but being movable within the syringe case between the first and second positions according to a controllable pressure on the piston means;
communication means for operative attachment of and in fluid communication between the syringe hand tool means operatively attaching and a gaseous pressure means for providing the controllable pressure to move the piston means from the first position to the second position; and
a control means connected in fluid communication between the syringe hand tool means and the gaseous pressure means for allowing selective control of delivery of the controllable pressure to the piston means.
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Abstract
A pneumatic retinopexy injector includes a syringe to which is communicated a controllable gaseous pressure source. A desired volume of a gaseous substance can be injected by the syringe by utilizing a controller to introduce the pressurized gas to the syringe to cause the piston of the syringe to eject any contents of the syringe. The manual controller can comprise a foot pedal having a variable flow pneumatic valve. The invention can also utilize a vacuum source which is switchable to the syringe to allow automatic filling of the syringe.
84 Citations
22 Claims
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1. A retinopexy injector means comprising:
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syringe hand tool means for manipulation and placement by the hands of a surgeon to inject a gaseous substance into a specific location in a patient'"'"'s eye to produce a gas bubble to assist in holding a partially detached or damaged retina in position for treatment, the syringe hand tool means including an injection needle connected in fluid communication directly to one end of a syringe case having an interior wall within which a piston means is movable between a first position and a second position nearer the injection needle, the piston means including a piston head in sealing contact with the interior wall of the syringe case, but being movable within the syringe case between the first and second positions according to a controllable pressure on the piston means; communication means for operative attachment of and in fluid communication between the syringe hand tool means operatively attaching and a gaseous pressure means for providing the controllable pressure to move the piston means from the first position to the second position; and a control means connected in fluid communication between the syringe hand tool means and the gaseous pressure means for allowing selective control of delivery of the controllable pressure to the piston means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A pneumatic retinopexy injector means comprising:
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syringe means for injecting a gaseous substance into a patient'"'"'s eye to produce a gas bubble to assist in holding a partially detached or damaged retina in position for treatment; the syringe means including an injection needle connected in fluid communication with a syringe body within which a piston is movable between at least a partially filled position and a discharge position; the syringe body including a flange means at its end opposite from the end connected to the needle; a base member comprising a first portion having a variable width bore therethrough; the syringe body passing through a narrowed portion of the bore, but the flange of the syringe body seating against shoulders surrounding the narrowed portion of the bore, to allow seating of the syringe body in the base member; cap means, releaseably securable to the first portion of the base means, for securing the syringe body into the base portion; and aperture means in the base means for providing fluid communication through the base member to the interior of the syringe body.
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17. A method for pneumatic retinopexy injection comprising:
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providing a fluid pathway to the interior of a syringe having a movable piston therein and a needle associated therewith; filling a desired volume of a gaseous substance into the syringe on one side of the piston; and controlling the introduction of a regulated pressurized gas to the syringe on the other side of the piston to expel the gaseous substance into a patient'"'"'s eye for a retinopexy procedure. - View Dependent Claims (20, 21, 22)
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- 18. The method of claim 18 wherein control of pressurized gas is accomplished by a manual control comprising a manually operated variable flow pneumatic valve.
Specification