American journal of critical care : an official publication, American Association of Critical-Care Nurses
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Review Comparative Study
Drawing coagulation studies from arterial lines: an integrative literature review.
How much blood must be discarded from a heparinized arterial line to obtain accurate coagulation studies, specifically activated partial thromboplastin time? The published literature provides insight into the question and guidelines for practice in adult critical care. This article reviews and integrates findings from 14 research studies published from 1971 to 1993 on discarding blood from arterial lines for coagulation studies. ⋯ Studies have demonstrated that adequate discard volume for activated partial thromboplastin time is 6 times the catheter dead space. These results should not be generalized to systemically heparinized patients, pediatric patients, or other types of heparinized lines such as pulmonary artery, central venous, or Hickman catheters.
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Comparative Study
Injectate port selection affects accuracy and reproducibility of cardiac output measurements with multiport thermodilution pulmonary artery catheters.
To compare the accuracy and reproducibility of thermodilution cardiac output measurements obtained from the injectate and infusion ports of a multilumen pulmonary artery catheter. The thermodilution results were compared with an independent measure of flow obtained from an electromagnetic flow meter. ⋯ The use of the infusion port for the measurement of thermodilution cardiac output measurements may result in nonreproducible and inaccurate results.
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The needs and satisfaction levels of family members of critically ill patients have received much attention in the literature. The feelings of family members, however, have not been thoroughly investigated. To develop appropriate nursing interventions to assist family members in coping with a critical care hospitalization, accurate information about their emotional response to the situation is needed. ⋯ The findings suggest that family members of critically ill patients experience deep emotional turmoil throughout the intensive care unit stay. Specific nursing interventions to promote adaptive coping are needed throughout the experience.
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To compare the accuracy of infrared ear-based temperature measurement in relation to thermometer, ear position, and other temperature methods, with pulmonary artery temperature as the reference. ⋯ Infrared ear thermometry is useful for clinical temperature measurement as long as moderately high variability between patients is acceptable. Readings differ among thermometers, although several instruments provide values close to pulmonary artery temperature in adults. Readings are not higher with an ear tug. Bladder temperature substitutes well for pulmonary artery temperature, whereas oral and axillary values may be influenced by external factors in the critical care setting.
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Little research was found to indicate that pain is managed well in hospitalized patients and few studies were found regarding pain management for critical care patients. ⋯ Results from this study suggest that nurses in both intensive care and surgical units do not appropriately assess, manage or evaluate pain and pain-related side effects. Patients who experience pain expect to have their pain controlled. Efforts must be made to change nurses' pain management behaviors.