Surgery – Container for blood or body treating material – or means used... – Container with piercable closure
Patent
1990-11-26
1992-08-11
Rosenbaum, C. Fred
Surgery
Container for blood or body treating material, or means used...
Container with piercable closure
604416, 604 48, 604 91, 604191, 604232, 222337, 222 80, A61B 1900
Patent
active
051375281
ABSTRACT:
An ampoule is disclosed having a stopper slidably mounted therein adjacent the proximal end and a rubber diaphragm secured to the distal end. An aperture barrier is provided in the ampoule between the proximal and distal ends, and has an aperture sealed by a plug. Sterile acidified liquid local anaesthetic is contained in an proximal compartment defined in the ampoule by the barrier and the stopper. Sterile alkaline neutralizing reagent is contained in the distal compartment defined in the ampoule by the barrier and the rubber diaphragm. In use, the ampoule is placed in the barrel of a hypodermic syringe, and is then manually advanced in the barrel toward the distal end of the syringe to cause the proximal end of the hypodermic needle of the syringe, which proximal end extends into the barrel of the syringe, to perforate the rubber diaphragm and communicate with the distal compartment of the ampoule. The distal end of the hypodermic needle is then inserted into the oral tissues of the patient. Thereafter, the plunger of the hypodermic syringe is advanced against the stopper to advance the stopper in the ampoule, thereby to pressurize the local anaesthetic in the proximal compartment sufficiently to dislodge the plug from the barrier aperture into the distal compartment, and to force the acidified local anaesthetic into the alkaline neutralizing reagent and thence immediately into the tissues of the patient.
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Polutta Mark O.
Rosenbaum C. Fred
Schuman Jack
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