Journal of clinical monitoring and computing
-
J Clin Monit Comput · Apr 1998
Propagation of nitric oxide pools during controlled mechanical ventilation.
Infusing nitric oxide at a constant rate into a breathing circuit with intermittent mainstream flow causes formation of nitric oxide pools between successive breaths. We hypothesized that incomplete mixing of these pools can confound estimates of delivered nitric oxide concentrations. ⋯ Incomplete mixing of nitric oxide confounds estimates of delivered nitric oxide concentrations. When nitric oxide is infused at a constant rate into a breathing circuit, we doubt that any sampling site outside the patient's lungs can reliably predict delivered nitric oxide concentrations. Strategies to ensure complete mixing and representative sampling of nitric oxide should be considered carefully when designing nitric oxide delivery systems.
-
J Clin Monit Comput · Apr 1998
Dynamic imaging of the pediatric upper airway during general anesthesia.
Video endoscopy can be easily performed in young children during general anesthesia. Airway patency can be directly qualified and then the video material can be transferred to a PC-based image analysis system for subsequent interactive teaching.
-
J Clin Monit Comput · Feb 1998
Randomized Controlled Trial Comparative Study Clinical TrialComputer aided monitor-data processing (CAMP). A landmark for unbiased gauging of anaesthetic courses?
A computer aided monitor-data processing system (CAMP-System) was developed in order to get a consistent and comprehensive database which can very precisely reflect intra-operative haemodynamic courses. The goal of the present study was to introduce a new method to scan and to gauge haemodynamic courses and to demonstrate its superiority over the traditional way of data processing based on a handwritten anaesthesia protocol. ⋯ Computerized data processing including automatic artifact suppression and data condensation was able to reveal differences in the course of haemodynamic variables that cannot be detected in a conventional handwritten protocol.
-
J Clin Monit Comput · Feb 1998
Comparative StudyComparison of blood pressure measured by oscillometry from the supraorbital artery and invasively from the radial artery.
In previous studies, oscillometric blood pressure measured from the supraorbital artery has been shown to agree quite well with pressure measured from the brachial artery in normal subjects. In this study, surgical patients whose conditions warranted the use of invasive blood pressure monitoring during the surgery were chosen. We compared systolic and diastolic blood pressure measured oscillometrically from the supraorbital artery with intraarterial blood pressures, measured invasively from the radial artery. ⋯ For the systolic pressure, the difference between the two methods was -9.9 +/- 17.9 mm Hg (mean +/- SD). For diastolic pressure, the difference was -8.0 +/- 10.9 mm Hg. There was a significant difference between the two methods in the patient population chosen in this study.