Non-invasive nuclear device for communicating pressure inside a

Details Non-invasive nuclear device for communicating pressure inside a Non-invasive nuclear device for communicating pressure inside a

1975-07-03

1978-11-07

Howell, Kyle L.

Surgery

Truss

Perineal

73708, 73729, 128 205D, 128 205E, 250336, A61B 500

Patent

active

041240235

ABSTRACT:
A non-invasive nuclear device for communicating pressure inside a body to the exterior, such as from within the cranium, bladder or vena cava, of an animal or human, the device including a housing having an interior communicating through a conduit of deformable metallic material with a fluid pressure sensing device positioned within the body portion being monitored, the housing being mounted on the body adjacent the body portion being monitored, a shaped mass of radioactive material together with radiation shield means being disposed within the housing interior together with urging means for producing a predetermined shielding relationship between the radioactive mass and the shield means, the radioactive mass being supported on the urging means for guide movement relative to the shield means and the sensed pressure being exerted through a pressure transmitting fluid flowing within the deformable metal conduit against the urging means for modifying the shielding relationship between the radioactive mass and the shield means proportionally with a change in fluid pressure in the body cavity thereby producing a radioactive output from the radioactive mass corresponding to the magnitude of the fluid pressure in the body position being monitored together with an ambient pressure sensing device mounted on the housing for applying ambient pressure through a pressure transmitting fluid to the urging means in opposition to the sensed body cavity pressure to compensate for changes in ambient pressure.

REFERENCES:
patent: RE26335 (1968-01-01), Chope
patent: 3034356 (1962-05-01), Bieganski et al.
patent: 3187181 (1965-06-01), Keller
patent: 3503402 (1970-03-01), Schulte
patent: 3625199 (1971-12-01), Summers
patent: 3686958 (1972-08-01), Porter et al.
patent: 3757770 (1973-09-01), Brayshaw et al.
patent: 3789667 (1974-02-01), Porter et al.
patent: 4027661 (1977-06-01), Lyon et al.
Bustard; T. S. et al., IEEE Trans. on Nucl. Science, vol. 21, No. 1, Feb., 1974, pp. 697-701.

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