keyword
https://read.qxmd.com/read/12455743/monitoring-pulmonary-function-with-superimposed-pulmonary-gas-exchange-curves-from-standard-analyzers
#21
JOURNAL ARTICLE
Harvey A Zar, Frances E Noe, James E Szalados, Michael D Goodrich, Michael G Busby
OBJECTIVE: A repetitive graphic display of the single breath pulmonary function can indicate changes in cardiac and pulmonary physiology brought on by clinical events. Parallel advances in computer technology and monitoring make real-time, single breath pulmonary function clinically practicable. We describe a system built from a commercially available airway gas monitor and off the shelf computer and data-acquisition hardware. METHODS: Analog data for gas flow rate, O2, and CO2 concentrations are introduced into a computer through an analog-to-digital conversion board...
April 2002: Journal of Clinical Monitoring and Computing
https://read.qxmd.com/read/10360217/software-for-real-time-control-of-a-tidal-liquid-ventilator
#22
JOURNAL ARTICLE
J L Heckman, J Hoffman, T H Shaffer, M R Wolfson
The purpose of this project was to develop and test computer software and control algorithms designed to operate a tidal liquid ventilator. The tests were executed on a 90-MHz Pentium PC with 16 MB RAM and a prototype liquid ventilator. The software was designed using Microsoft Visual C++ (Ver. 5.0) and the Microsoft Foundation Classes. It uses a graphic user interface, is multithreaded, runs in real time, and has a built-in simulator that facilitates user education in liquid-ventilation principles. The operator can use the software to specify ventilation parameters such as the frequency of ventilation, the tidal volume, and the inspiratory-expiratory time ratio...
May 1999: Biomedical Instrumentation & Technology
https://read.qxmd.com/read/9390914/pulmonary-function-in-the-mechanically-ventilated-patient
#23
REVIEW
A Adams
Implementing the knowledge and skills obtained from the pulmonary function laboratory is useful in the assessment of pulmonary function in the ventilated patient. In the critically ill patient, special constraints and problems (such as safety and ability to cooperate) are important considerations for the therapist performing the testing. Basic measurements such as MIP, VC, VT, MVV, VE, and respiratory rate are commonly made to assess weanability. For the difficult-to-wean patient, WOB, PTP, P0.1 and O2COB may be of potential value in selected patients...
June 1997: Respiratory Care Clinics of North America
https://read.qxmd.com/read/9076547/clinical-application-of-the-conductance-catheter-technique-in-the-adult-human-right-ventricle
#24
JOURNAL ARTICLE
A Bishop, P White, P Oldershaw, R Chaturvedi, C Brookes, A Redington
This study examines the use of conductance catheters to assess human right ventricular volume. Ten patients undergoing diagnostic cardiac catheterisation underwent right heart catheterisation with a conductance catheter and micromanometer, and a thermodilution catheter before and after fluid loading. Parallel wall conductance (Vc), and the multiplication factor relating conductance and thermodilution derived stroke volumes (å) were derived at each steady state. Pressure-volume cycles were analyzed at steady state and during fluid loading...
February 1997: International Journal of Cardiology
https://read.qxmd.com/read/4040720/main-systolic-blood-flow-patterns-in-the-left-and-right-ventricular-outflow-tracts-determined-by-doppler-echocardiography
#25
JOURNAL ARTICLE
K Itoh
The main blood flow velocity patterns in the LVOT and RVOT were recorded by pulsed Doppler echocardiography in 28 normal healthy cases, in two athletes, and in 85 patients with atrial septal defects, pulmonary regurgitation, tetralogy of Fallot, aortic regurgitation, mitral stenosis, aortic stenosis, mitral regurgitation, hypertrophic cardiomyopathy, ischemic heart disease, and pulmonary hypertension. Blood flow velocities were displayed using a graphic system to form a real time sonogram, using Fast Fourier Transformation...
March 1985: Angiology
https://read.qxmd.com/read/3549134/a-flight-simulator-for-general-anesthesia-training
#26
JOURNAL ARTICLE
H A Schwid
A simulator of general anesthesia is described. It consists of an integrated set of physiologic computer models and a graphics display. The model predicts many of the physiologic and pharmacodynamic changes associated with general anesthesia. It is a multiple model consisting of circulatory, respiratory, pharmacokinetic, and pharmacodynamic models and their interactions. The model can account for many pathologic states of the cardiorespiratory system plus poor renal and hepatic function. Both intravenous and inhalation agents are included...
February 1987: Computers and Biomedical Research, An International Journal
https://read.qxmd.com/read/3357335/septal-thickness-in-human-lungs-assessed-by-computerized-interactive-morphometry
#27
JOURNAL ARTICLE
J Gil, A M Marchevsky, H Jeanty
We have studied the feasibility of using interactive computerized morphometric methods for the quantitation of septal thickness in the lung with the goal of introducing objective criteria for the diagnosis and grading of pulmonary fibrosis and edema. After reviewing available methods, we have decided in favor of linear intercept measurements of septal profiles which are limited to the tissue and therefore not affected by the level of lung inflation. Our method consisted in generating a graphic overlay of parallel lines over a real time video display of lung tissue...
April 1988: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://read.qxmd.com/read/1808869/-measurement-accuracy-of-oscillatory-and-whole-body-plethysmography-determination-of-airway-resistance-study-of-a-mechanical-model
#28
JOURNAL ARTICLE
D Walliser, H Lenders, F Gleisberg, K Schumann, W Neuerburg
The degree of accuracy of the plethysmographic and oscillatory method in determining respiratory resistance has been examined on a mechanical lung model. At this model different levels of the resistance could be reproducibly adjusted and exactly determined with sensitive measuring instruments. The plethysmographic method allows a precise estimation of the resistance. It was found that the absolute variation of the plethysmographically measured values is not greater than 5%. The Ros pointer scale of the Siregnost FD 5 yields systematically incorrect curve diagrams...
1991: Zeitschrift Für Erkrankungen der Atmungsorgane
https://read.qxmd.com/read/1748846/analog-to-digital-clinical-data-collection-on-networked-workstations-with-graphic-user-interface
#29
JOURNAL ARTICLE
D Lunt
An innovative respiratory examination system has been developed that combines physiological response measurement, real-time graphic displays, user-driven operating sequences, and networked file archiving and review into a scientific research and clinical diagnosis tool. This newly constructed computer network is being used to enhance the research center's ability to perform patient pulmonary function examinations. Respiratory data are simultaneously acquired and graphically presented during patient breathing maneuvers and rapidly transformed into graphic and numeric reports, suitable for statistical analysis or database access...
February 1991: Journal of Medical Systems
https://read.qxmd.com/read/1414801/evaluation-of-congenital-heart-disease-with-mr-imaging-current-and-coming-attractions
#30
REVIEW
K E Fellows, P M Weinberg, J M Baffa, E A Hoffman
Nearly 10 years of experience in the use of MR imaging for the diagnosis of congenital heart disease has accumulated. Although MR imaging is superior to other techniques in showing certain structures and abnormalities such as small central pulmonary arteries in tetralogy of Fallot, aortic coarctations, and venous connections in heterotaxia syndromes, it remains an ancillary tool to echocardiography and cardiac catheterization. In this review, we examine present limitations and advantages of conventional MR in the evaluation of congenital anomalies of the heart and great vessels and explore future developments that might bring MR imaging into the diagnostic mainstream...
November 1992: AJR. American Journal of Roentgenology
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