Lon C. Kelly

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OBJECTIVE Evaluation of an approach to choosing left double-lumen tube size based on chest computed tomographic (CT) scan measurement of left bronchial diameter. DESIGN Prospective. SETTING The operating rooms of a university hospital. PARTICIPANTS Patients scheduled for elective thoracic surgery. INTERVENTIONS Patients had their left bronchial(More)
We have developed a new J-shaped lead for atrial pacing. The lead has silicone rubber tines which become entangled in the trabeculae and thereby anchor the lead firmly in the left atrial appendage. Later, scar tissue forms around the tines, rather than around the electrode, so that there is no problem with either lead displacement or loss of sensing.
A study was conducted employing the Visual Motion Simulator (VMS) at the NASA Langley Research Center, Hampton, Virginia. This study compared two motion cueing algorithms, the NASA adaptive algorithm and a new optimal control based algorithm. Also, the study included the effects of transport delays and the compensation thereof. The delay compensation(More)
The problems of transport delay in a flight simulator, such as its sources and effects, are reviewed. Then their effects on a pilot-in-the-loop control system are investigated with simulations. Three current prominent delay compensators—the lead/lag filter, McFarland filter, and the Sobiski/Cardullo filter were analyzed and compared. This paper introduces(More)
Clinical experience with isotopic pacemakers in 59 patients is compared with that in 77 control patients having conventional chemical battery-powered pulse generators. The review covers a 51/2-year period. Statistical analysis of the two series is impossible because of the numerous variables such as age, type of disease, number of controls, types of test(More)
A small light-weight nuclear-powered pacer has been developed. The pulse generator weight 61 Gm. and occupies a volume of 33 sq. cm. It is a standard R-wave inhibited (VVI) demand pulse generator. The unit has met all United States and foreign atomic energy commission safety specifications including mechanical shock, industrial fire, accidental crush,(More)
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