Critical care nursing clinics of North America
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Crit Care Nurs Clin North Am · Jun 2006
Review Case ReportsRecognizing and treating ischemic insults to the brain: the role of brain tissue oxygen monitoring.
This article describes the potential application of brain tissue oxygen monitoring technology in the care of patients who have sustained traumatic brain injury (TBI) or subarachnoid hemorrhage (SAH). To accomplish this objective, a review of the intracranial dynamics that are created by primary and secondary brain injury, and the challenges of optimizing oxygen delivery to the injured brain are presented. Furthermore, interventions that facilitate cerebral oxygen supply and reduce oxygen consumption are identified. Finally, application of this technology is highlighted by using case vignettes of patients who have TBI or SAH.
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Traditionally, bedside evaluation of tissue oxygenation has been accomplished by assessing mixed venous oxygen saturation (SvO2) using a fiberoptic pulmonary artery catheter. It may not always be feasible to place a pulmonary artery catheter early in resuscitation or outside of the ICU. Introduction of continuous central venous oxygen saturation (ScvO2) monitoring that uses a modified, central venous catheter is making it possible to evaluate ongoing tissue oxygenation in nontraditional settings, such as the Emergency Department. Continuous measurement of ScvO2 will alert the clinician to major derangements in oxygen balance, which allows for timely implementation of appropriate interventions.
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Crit Care Nurs Clin North Am · Jun 2006
Review Case ReportsEsophageal Doppler monitoring for hemodynamic assessment.
This article reviews the importance of hemodynamic monitoring in adding to the clinical assessment of critically ill patients. The esophageal Doppler monitor (EDM) provides a less invasive way of obtaining hemodynamic information quickly and safely at the bedside. The concepts of Doppler signal acquisition and important nursing considerations are reviewed. Case studies are provided to understand how data from the EDM can impact patient care decisions at the bedside.
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Crit Care Nurs Clin North Am · Jun 2006
ReviewPractice standards for ECG monitoring in hospital settings: executive summary and guide for implementation.
Current goals of hospital ECG monitoring are to diagnose cardiac arrhythmias, acute myocardial ischemia, and drug-induced prolonged QT interval. Recently, experts in the field of electrocardiology and cardiac monitoring convened to develop a practice standard for hospital ECG monitoring. This executive summary reviews key elements of the practice standard and answers questions that often arise when clinicians try to implement them.
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Crit Care Nurs Clin North Am · Jun 2006
ReviewEnd-tidal carbon dioxide monitoring: a VITAL sign worth watching.
Capnography is the monitoring of end-tidal carbon dioxide in waveform and numeric display. For this technology to be useful, the critical care nurse must have a clear understanding of the normal capnography waveform and what the alterations in this waveform represent. The critical care nurse can use this information to plan patient care interventions with other critical care team members and to adjust care based on the patient's response. End-tidal carbon dioxide physiology, normal waveforms, abnormal waveforms, and clinical aspects of capnography monitoring are included.