Cardiovascular impact of manual and automated turns in ICU
- Resource Type
- Conference
- Authors
- Padhye, Nikhil S.; Hamlin, Shannan; Brazdeikis, Audrius; Hanneman, Sandra K.
- Source
- 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE. :1844-1847 Sep, 2009
- Subject
- Bioengineering
Computing and Processing
Cardiology
Blood pressure
Turning
Heart rate
Medical services
Fluids and secretions
Lungs
Pressure measurement
Ventilation
USA Councils
- Language
- ISSN
- 1094-687X
1558-4615
Mechanically ventilated patients in the intensive care unit (ICU) are typically turned manually by nursing staff to reduce the risk of developing ventilator associated pneumonia and other problems in the lungs. However, turning can induce changes in the heart rate and blood pressure that can at times have a destabilizing effect. We report here on the early stage of a study that has been undertaken to measure the cardiovascular impact of manual turning, and compare it to changes induced when patients lie on automated beds that turn continuously. Heart rate and blood pressure data were analyzed over ensembles of turns with autoregressive models for comparing baseline level to the dynamic response. Manual turning stimulated a response in the heart rate that lasted for a median of 20 minutes and was of magnitude 5 to 13 bpm. The corresponding response in mean arterial pressure was 11 to 19 mm Hg, lasting for 8 to 21 minutes. There was no discernible response of either variable to automated turns.