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Biomedical subjects

J S Henke

Publications and source records attributed to J S Henke.

12 recordsLinked to original sources
PubMed1988

Computer-assisted learning compared with weekly seminars for teaching fundamental electrocardiography to junior medical students.

This study was designed to assess whether a self-study interactive computer program is more effective than weekly seminars for teaching fundamental skills of electrocardiographic interpretation to junior medical students. Forty-two students were assigned to the computer and 41 to the seminar group. A test was given to each participant at the beginning and end of each rotation. The computer group used a computer-assisted learning program, and the seminar group met weekly with a cardiologist to review electrocardiograms. Attendance at a minimum of 80% of the seminars or completion of 80% of the computer-assisted learning program was required for inclusion in the statistical analysis. The mean difference in test scores before and after study was 5.69 for the computer group and 4.36 for the seminar group (P less than .02 by one-tailed t-test). These results indicate that the computer group performed significantly better than the seminar group. We believe this difference to be educationally important.

Attitude↗
PubMed1987

Computer-aided learning: experiences, perspectives and promises.

Despite the recent strong interest in computer-aided learning, very few high quality programs are available. This article describes an authoring system that was designed to help faculty at medical schools develop a library of effective computer-based lessons. Features of the system include ease of authoring and the ability to incorporate natural language input by the learner, model complex situations, keep track of 100 performance variables and employ interactive laser video disk technology. The authors describe the experience that has been gained in the development and implementation of computer-aided learning at a medical school, and reflect on its future applications and value.

Computer Simulation↗
PubMed1985

Use of a personal computer with an automatic noninvasive ambulatory blood pressure monitoring device.

Automatic ambulatory blood pressure monitoring is a valid and reliable tool for intermittent noninvasive assessment of blood pressure over a 24-hour period. However, reporting devices to retrieve data from the recording device are dedicated to one task and are expensive. Because of this, we have developed computer programs for a popular inexpensive microcomputer that retrieves data from the Del Mar Pressurometer III, an R-wave gated automatic ambulatory blood pressure monitoring device. Furthermore, the derived data may be edited, computed to derive statistics, stored, retrieved, displayed, and reported in both numerical and graphical format. This same hardware is used for multiple other tasks.

Blood Pressure↗
PubMed1984

The use of natural language entry and laser videodisk technology in CAI.

One reason for the limited use of computer-assisted instruction in medical education has been that the writing of lessons often requires complex programming skills. Recently developed authoring systems for microcomputers now permit teachers unfamiliar with computers to write realistic clinical simulations for use in both instruction and evaluation. The authors in this paper describe the use of an authoring system which incorporates two important features: student interaction with the computer by natural language entry at the keyboard and the use of the microcomputer to direct a random-access laser videodisk player. For the purpose of evaluation, memory registers are employed to assign scores to several aspects of performance and to derive monetary costs for components of patient assessment and treatment. Similar registers are used to codify instructions for altering the clinical state of the simulated patient. The realistic simulations facilitate both problem-based learning and the evaluation of several cognitive aspects of clinical competence.

Computer-Assisted Instruction↗
PubMed1983

Scalp and depth recordings of induced deep cerebral potentials.

A balanced square wave was introduced between two adjacent depth electrodes implanted in the course of studying patients with intractable epilepsy and who were being considered for surgery. The stimulus current was designed so that charge density loading was well within limits of safety to avoid tissue damage. No neuronal activation was seen, and the stimulus intensity was significantly less than that used in subsequent stimulation session for the purpose of eliciting a clinical response and after-discharges. Averaging techniques were used to record the stimulus at distant electrodes both within the cerebrum and on the scalp. The recorded voltage decrement from the source was nearly identical with the theoretical voltage decrement predicted using principles of electric field theory in which the brain was assumed to be a homogeneous conductive medium. When the voltage recorded on the scalp was compared with the voltages recorded from depth electrodes, it was found that the effect of the highly resistive skull on voltage decrement was relatively less the more centric the source. This result also confirmed predictions based on electric field theory. Most significantly, voltages well within the physiologic range introduced in deep mesial temporal lobe structures were recorded from the scalp.

Brain↗
PubMed1983

Classroom use of personal computers in medical education: a practical approach.

Classroom lectures in medical schools have traditionally employed a blackboard and slides. We have developed a compact, durable, and relatively low-priced system for computer-assisted instruction which introduces audiovisual material in a random-access manner. When this system was used in the classroom to provide flexible, clinical simulations, it promoted a high level of audience-instructor interaction and facilitated problem-based learning. The system has been used successfully in lectures in our medical school, at other medical schools, at community hospitals and at national scientific meetings.

Computer-Assisted Instruction↗
PubMed1982

Use of a personal computer in the measurement, calculation, and reporting of noninvasive cardiac data.

Echocardiography, phonocardiography, and carotid pulse tracings enable the cardiologist to measure and calculate over 40 different noninvasive parameters including cardiac chamber size, indices of left ventricular performance, and estimates of mean left atrial pressure. However, the entire procedure requires meticulous measurements and time-consuming calculations, particularly when some of the data must be corrected for heart rate or body size. Because of this, many busy noninvasive cardiac laboratories routinely calculate only a few select parameters in most patients. To solve this problem, we used a personal computer system and developed a program that allows rapid, accurate measurement, calculation, display, reporting, magnetic storage, and retrieval of noninvasive cardiac data. The computer is not dedicated to these tasks alone and with appropriate software can also be used for other clinical, educational, office management, and research purposes.

Computers↗