Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1988-11-03
1990-07-31
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 70, 604 97, 222389, A61M 5145
Patent
active
049447262
ABSTRACT:
A hand-held and operated pneumatically powered device for injecting fluids, such as in medical applications, consisting of a housing that is sized and shaped to be hand held, and connected power and infusion assemblies contained within the housing. The power assembly includes a sealed vessel containing pressurized gas, a lever-needle vessel-puncturing mechanism, a gas flow path leading from the needle to the infusion assembly, and pressure regulator and pressure relief mechanism (which may include a pneumatic flow control orifice) interposed in the flow path. The infusion assembly includes a two-way valve for exhausting the gas or directing it into a power chamber for receiving the gas connected in tandem with an infusion chamber that holds the infusate, a two-headed piston contained within and spanning the two chambers with one of its heads in contact with the pressurized gas and the other in contact with the infusate, and a throttle mechanism at the outlet of the infusion chamber for regulating the pressurized flow of infusate into and out of the infusion chamber by means of a two-way valve. A pressure gauge may be provided for measuring the pressure of the infusate.
In one embodiment, two power infusion devices are coupled together with a common pressurized gas source and are also coupled together at their outlets for providing two different infusates to the proximal and distal ends of a catheter. A ball valve is utilized to purge the infusates of entrapped gas.
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Cooper Robert P.
Hilal Said S.
Applied Vascular Devices
Pellegrino Stephen C.
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