Form 15 (3/31/86) NSF PROJECT IST-850 5411 EXPERIMENTS ON THE COGNITIVE ASPECTS OF INFORMATION SEEKING AND INFORMATION RETRIEVING USER QUESTIONS FOR ONLINE SEARCHES QUESTION NUMBER: 004 A1. BRIEF TITLE: Controlled lung hyperinflations, endotracheal suctioning, and cerebrovascular status in persons with severe closed head injuries A2. QUESTION STATEMENT: The aim of the research is to identify the effects of controlled hyperinflation breaths, delivered prior to and following endotracheal suctioning, upon the cerebrovascular status of adult subjects with severe closed head injuries. Specifically, two research questions have been generated. 1. What are the effects of controlled lung hyperinflation breaths delivered prior to and following endotracheal suctioning upon Mean Intracranial Pressure (MICP), Mean Arterial Blood Pressure (MABP), Cerebral Perfusion Pressure and Heart Rate in adults with severe closed head injuries? 2. What is the optimal lung volume delivered during controlled lung hyperinflations that will produce minimal changes in Mean Intracranial Pressure, Mean Arterial Blood Pressure, Cerebral Perfusion Pressure and Heart Rate in adults with severe closed head injuries? TYPE OF SEARCH REQUESTED B. A precise or a broad search: Broad C. Research application: Graduate study-Nursing D. Retrieve articles in English only or any language: English E. Years to be searched: No limits F. DIALOG databases suggested: Š