Surgery – Truss – Pad
Patent
1995-08-21
1997-10-14
Cohen, Lee S.
Surgery
Truss
Pad
128642, 128664, 128691, 128736, A61B 500
Patent
active
056761457
ABSTRACT:
A cerebral hemodynamics monitoring device includes a catheter having an optic fiber 20 for measurement of oxygen saturation, a first thermistor 30 positioned not more than about 25 mm from the tip of the catheter, and a second thermistor 32, located preferably at an entry to the catheter. The catheter is insertable in a vein over a guide wire using the Seldinger technique. The monitoring device also includes a computerized cerebral hemodynamics monitor that performs continuous jugular oximetry (S.sub.j O.sub.2, %), arterial pulse oximetry (S.sub.a O.sub.2, %), and measurement of jugular blood flow (JBF, ml/min/100 g tissue), preferably via retrograde thermodilution based on data collected in the catheter devices. Based on these measurements, the monitoring device performs continuous calculation of cerebral O.sub.2 extraction (CEO.sub.2, %), cerebral O.sub.2 consumption (CMRO.sub.2), cerebral blood flow (CBF), and cerebral vascular resistance (CVR). The device system also includes a programmable injectate infusion pump connected to the catheter that provides for background flow, planned interval boluses, and PRN bolus capability. The monitoring system also includes output devices for displaying data and for communicating data to other external devices.
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Carter Ryan
Cohen Lee S.
University of Maryland at Baltimore
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