Craig Koontz

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The vascular noninvasive studies of 289 consecutive cardiac surgery patients were reviewed to better understand hand blood-flow physiology in an older population with vascular disease. The radial artery was found to be more important to pulsatile digital blood flow than the ulnar artery. In more than 20 percent of hands, the thumb and the index and fifth(More)
OBJECTIVE To increase utilization of influenza vaccination among long-term-care health workers. DESIGN Before-after intervention study. SETTING A 300-bed life-care community served by 195 staff employees. INTERVENTION An educational intervention followed by a Vaccination Fair. MEASUREMENTS Percent receiving vaccination. A post-intervention survey(More)
Fourteen patients were surgically treated for ulnar artery occlusion. Digital blood pressure measurements obtained pre- and intraoperatively helped guide the choice between ligation or reconstruction of the ulnar artery following resection of the occluded segment. The digital brachial index (DBI) was derived by calculating the ratio of digital blood(More)
Compression is a technique to immobilize the target or improve the dose distribution within the treatment volume during different irradiation techniques such as AccuBoost(®) brachytherapy. However, there is no systematic method for determination of dose distribution for uncompressed tissue after irradiation under compression. In this study, the mechanical(More)
Monte Carlo simulations are widely used for calculation of the dosimetric parameters of brachytherapy sources. MCNP4C2, MCNP5, MCNPX, EGS4, EGSnrc, PTRAN, and GEANT4 are among the most commonly used codes in this field. Each of these codes utilizes a cross-sectional library for the purpose of simulating different elements and materials with complex chemical(More)
To determine whether pregnancy and the gravid uterus have an effect on phleborheographic findings, 48 asymptomatic pregnant patients underwent phleborheography in the second or third trimester or the immediate postpartum period. Their phleborheograms were compared to normal phleborheograms of nonpregnant patients with normal venograms. No difference was(More)
Using the examination of any body system, and examiner must be able to detect and assess disease as accurately as possible and then evaluate the status of the remaining function. When studying the vascular system of the upper extremity in particular, physiologic information must be provided in addition to the more commonly investigated structural(More)
The need for a reliable noninvasive method to detect deep venous thrombosis (DVT) is apparent from its prevalence, the fallibility of its clinical diagnosis, and the several drawbacks of phlebography. Experience with phleborheography (a plethysmographic technique for detecting DVT) over three years is presented. Phleborheography (PRG) is found to have an(More)
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