Surgery – Truss – Pad
Patent
1990-12-03
1993-06-15
Cohen, Lee S.
Surgery
Truss
Pad
128748, 738665, A61B 502
Patent
active
052189651
ABSTRACT:
A catheter carrying a sensor for placement in a catheter adapter has proximal and distal parts with a passage therebetween. The distal part detachably fits within a catheter adapter. The connector, when attached to the adapter, places the passage in fluid communication with and near a catheter lumen. A sensor on the connector within the distal part is exposed to the passage for fluid communication with the lumen. The sensor mounts on a tube or in an inside wall of the distal part and extends within the passage and partially through the distal part to monitor pressure with a first side of the sensor exposed to the passage and a second side of the sensor covering an exit from the connector near the proximal part. The second side is vented to atmospheric pressure and a sensor signal communication means connects the sensor to pass signals from the sensor through the exit. A sleeve extends distally on the connector for threaded engagement with a male luer on the adapter allowing fluid tight communication between a cavity within the adapter and the passage. The distal part substantially fills the cavity reducing the hydraulic column volume in the lumen and the passage. A method places a catheter into a human or animal to provide access to dynamic pressure, measures atmospheric pressure with a sensor carried on a connector, sets the signal response of the sensor measurement to a datum for atmospheric pressure applied to first and second sides and attaches the connector to the adapter to fit the distal part into the cavity in the adapter so gas within the cavity and the passage escapes to provide a hydraulic column substantially free of gas.
REFERENCES:
patent: 4763648 (1988-08-01), Wyatt
patent: 4920972 (1990-05-01), Frank et al.
patent: 4936310 (1990-06-01), Engstrom et al.
patent: 5086777 (1992-02-01), Hishii
patent: 5097841 (1992-03-01), Moriuchi et al.
Becton Dickinson and Company
Cohen Lee S.
Nasser Jr. Robert L.
Passman Aaron
Schwarz Michael G.
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