# IEEE Transactions on Biomedical Engineering

## Filter Results

Displaying Results 1 - 25 of 28

Publication Year: 1975, Page(s): c1
| |PDF (888 KB)
• ### IEEE Engineering in Medicine and Biology Group

Publication Year: 1975, Page(s): c2
| |PDF (175 KB)
• ### Modeling the Stationarity and Gaussianity of Spontaneous Electroencephalographic Activity

Publication Year: 1975, Page(s):361 - 369
Cited by:  Papers (92)
| |PDF (2500 KB)

Considerable motivation exists for the development of an adequate statistical model for spontaneous electroencephalographic (EEG) activity. At present, almost all methods of time-domain and frequency-domain EEG analysis are based on implicit assumptions regarding the statistical characteristics of the underlying random process, particularly with respect to the extent of stationarity and Gaussianit... View full abstract»

• ### The Electrical Response of the Human Eye to Sinusoidal Light Stimulation

Publication Year: 1975, Page(s):369 - 378
Cited by:  Papers (4)  |  Patents (9)
| |PDF (2705 KB)

In order to extract maximum information from electroretingraphic waveforms obtained under clinical conditions, it is necessary to have reliable quantitative methods to characterize both the amplitude and shape of these waveforms. When sinusoidally modulated light is used to stimulate the retina, the resulting ERG potentials are, in general, not sinusoidal due to the nonlinearities in the system. H... View full abstract»

• ### Estimation of Intracellular Potentials from Evoked Neural Pulse Trains

Publication Year: 1975, Page(s):379 - 383
Cited by:  Papers (1)
| |PDF (1014 KB)

An algorithm is presented for estimating the time course of intracellular generator potentials on the basis of the times of occurrence of evoked neural impulses, under conditions of external sinusoidal stimulation, and assuming SS-IPFM encoding. Recorded neural pulses are applied to the output of a theoretical SS-IPFM encoder (in reverse'') and a least-squares criterion is adopted for estimating... View full abstract»

• ### Analog Simulation of Left Ventricular Bypass Mode Control

Publication Year: 1975, Page(s):384 - 392
Cited by:  Papers (5)
| |PDF (2462 KB)

The subject of this study is optimal mode control for the left ventricular bypass pump used to assist the failing heart. A mathematical model has been formulated for the overall cardiovascular system both with and without bypass assistance. The closed-loop, uncontrolled model of the unassisted circulation has been implemented on an analog computer and has been demonstrated capable of simulating no... View full abstract»

• ### Analysis of Plethysmographic Estimation of Alveolar Pressure

Publication Year: 1975, Page(s):393 - 399
| |PDF (1946 KB)

Relationships between the change in a representative alveolar pressure in a pulmonary system which acts as a single mechanical compartment and changes in measurable variables are derived for several plethysmographic systems. Derivations considering air as a one-component gas are presented for the pressure and flow-displacement plethysmographs in which the subject exchanges respired gas with air in... View full abstract»

• ### Analysis and Simulation of an Adaptive System for Forced Ventilation of the Lungs

Publication Year: 1975, Page(s):400 - 411
Cited by:  Papers (2)
| |PDF (2390 KB)

A design technique, based on the model reference adaptive control approach for the long term ventilation of the lungs is presented. The design objective is to minimize the harmful effects (e.g., interference in the circulatory system, mechanical damage, etc.) due to possible change in the patient's respiratory parameters (i.e., the airway resistance and the lung and chest wall compliance) during t... View full abstract»

• ### An Electromechanical Demand Regulated Liquid Breathing System

Publication Year: 1975, Page(s):412 - 417
Cited by:  Papers (12)  |  Patents (6)
| |PDF (1186 KB)

The process of breathing liquid requires consideration of several problems not typical in gas respiration. These problems stem from the physical properties of liquid such as density, viscosity, and low diffusivity of gases which increase respiratory work. The objective of this study was to develop and study the feasibility of a demand controlled system for providing mechanical assistance and ameli... View full abstract»

• ### A Body Current Activated Circuit Breaker

Publication Year: 1975, Page(s):418 - 420
Cited by:  Patents (2)
| |PDF (780 KB)

The body current activated circuit breaker (BAB), provides a new means of protection from accidental electric shock. It senses the current flowing in the body and reacts to, a dangerous situation by interrupting the power source. An experimental model using a toroidal coil sensor was built and tested successfully. View full abstract»

• ### Analog Sample/Hold Circuit for Physiological Signal Monitoring

Publication Year: 1975, Page(s):420 - 423
Cited by:  Papers (1)  |  Patents (2)
| |PDF (989 KB)

Frequently in measuring physiological variables it is necessary to store an electrical signal for relatively long periods of time. The circuit presented has been designed for this purpose, and can operate with signals up toÂ±10 v with drift rates dependent upon the stored voltage but typically less than 7 mv/hr. View full abstract»

• ### Preliminary Trials in Single Living Cells with a Piezoelectric Microinjector

Publication Year: 1975, Page(s):424 - 426
Cited by:  Papers (4)
| |PDF (1782 KB)

A piezoelectric microinjector which utilizes the expansion of a ceramic cylinder into a surrounding cavity was used for injections of glucose-6-P, Na+ and fluorescein, Na+ into single living EL2 ascites cells. The results were assessed in a microspectrofluorometer by fluorescein emission or NAD(P)H fluorescence associated with glucose-6-P metabolism. With micropipettes exhibiting an ... View full abstract»

• ### An Automatic Zeroing Circuit

Publication Year: 1975, Page(s):427 - 428
Cited by:  Papers (1)  |  Patents (1)
| |PDF (473 KB)

A circuit to remove an offset from a signal is described. The circuit uses a simple digital memory to store the offset, and the output is the difference between this stored offset and the input signal. The drift is small, the bandwidth wide, and the input voltage may be obtained in digital form. View full abstract»

• ### A Note on Jogging on a Windy Day

Publication Year: 1975, Page(s):428 - 429
| |PDF (509 KB)

A minimum-time, fixed energy strategy for running a circular track on a windy day is derived which expresses velocity and acceleration as simple trigonometric functions of the runner's position on the track. Rather surprisingly, the strategy directs the runner to begin accelerating when the wind is directly in his face and decelerating with the wind directly at his back. View full abstract»

• ### A Percutaneous Wire Electrode for Chronic Research Use

Publication Year: 1975, Page(s):429 - 432
Cited by:  Papers (48)  |  Patents (3)
| |PDF (1110 KB)

A percutaneous wire electrode has been developed which permits long-term recording of intramuscular EMG signals. The electrode consists of a small coil wound from 0.0011 inch diameter wire and filled with silicone rubber. Easily inserted by means of a hypodermic needle, it has demonstrated reliable EMG recording for periods of up to thirteen months. View full abstract»

• ### Filtering without Phase Shift

Publication Year: 1975, Page(s):432 - 433
Cited by:  Papers (8)  |  Patents (1)
| |PDF (1346 KB)

The influences of phase shifts are extremely important in the determination of filtered waveforms and therefore in the interpretation of many biosignals. Low frequency shifts from high pass filtering, for example, are significant because large time displacements result from small phase deviations in the vicinity of the corner frequency. If a filter with a symmetric time response is employed, no ph... View full abstract»

• ### A Scheme for Biological Model Improvement (A Classroom Approach)

Publication Year: 1975, Page(s):433 - 435
| |PDF (1448 KB)

This communication presents a classroom procedure for minimizing the error between simulated data and experimental data to obtain the best'' parameters for a given system model. It is hoped that such experience helps in the process of biological model building and brings out the advantages of different types of simulations used for model improvement. View full abstract»

• ### Manufacture of Metal Microelectrodes with the Scanning Electron Microscope

Publication Year: 1975, Page(s):435 - 437
Cited by:  Papers (19)
| |PDF (1888 KB)

This communication describes a new method of manufacturing tungsten microelectrodes with finer tip size and more reproducible exposed recording area than has been previously achieved. The tips are dc electroetched to diameters below 500 A and completely covered with polymethyl methacrylate. An electron beam from a scanning electron microscope is then used to expose a precise area on the tip for la... View full abstract»

• ### Quantitative Gait Evaluation of Hemiplegic Patients Using Electrical Stimulation Orthoses

Publication Year: 1975, Page(s):438 - 441
Cited by:  Papers (37)
| |PDF (1045 KB)

Although the functional electrical stimulation orthosis is one of the most recent approaches to the rehabilitation of hemiplegic patients, the quantitative estimate of its influence on the patients walking is not satisfactorily solved. In this communication the variables necessary for gait evaluation are defined and two quantitative methods for their interpretation are given. The second method was... View full abstract»

• ### Precise Voltage to Frequency Converter for Telemetry Applications of Strain Gage Pressure Transducers

Publication Year: 1975, Page(s):441 - 443
Cited by:  Papers (3)  |  Patents (1)
| |PDF (816 KB)

A voltage to frequency converter suitable for telemetric applications of strain gage pressure transducers is described and analyzed. The circuit uses a voltage reference IC and a temperature dependent op amp bias current to achieve zero pressure offsets less than 3 torr over a 25Â°C temperature range and a 1 volt supply voltage range. View full abstract»

• ### Postprandial Bowel Sounds

Publication Year: 1975, Page(s):443 - 448
Cited by:  Papers (7)  |  Patents (3)
| |PDF (1346 KB)

Bowel sounds were recorded under standard conditions for 30 minutes before, and for 90 minutes after a standard meal in 12 healthy human volunteers. The sounds were analyzed with the aid of a computer, and the evolution in time of specific parameters obtained as a quantitative printout. The number, total duration, and mean energy of sounds totaled for ten minute periods were found to be markedly i... View full abstract»

• ### Fluid Flow Effects on Readings from the Mass Spectrometer with Diffusion Membrane Catheter

Publication Year: 1975, Page(s):448 - 451
Cited by:  Papers (1)
| |PDF (1185 KB)

The diffusion membrane catheter coupled to the mass spectrometer has previously been used to measure partial pressures of gases in blood. However, measurement errors arise due to depletion of gases in the vicinity of the catheter. The nature of these errors in oxygen and argon partial pressure measurement is described for in vitro and in vivo studies. The in vitro setup consisted of a catheter hav... View full abstract»

• ### The Effect of Measurement Errors on Correlation Estimates in Interval Sequences

Publication Year: 1975, Page(s):451 - 454
Cited by:  Papers (1)
| |PDF (1007 KB)

The serial correlation coefficients are used to estimate the degree of dependence in inter-pulse interval sequences. The effect of measurement errors (i.e., one pulse missing or one extra pulse artificially generated) on the value of the coefficients is determined. The theory indicates that simple rules for correction exist and that a bestguess conversion from damaged pulse train to undamaged vers... View full abstract»

• ### Correction to A Survey Analysis of Biomedical Engineering Education''

Publication Year: 1975, Page(s): 454
| |PDF (221 KB)
• ### Correction and Addendum to On the Fluid Mechanics of Human Coronary Artery Stenosis''

Publication Year: 1975, Page(s):454 - 455
| |PDF (1291 KB)

## Aims & Scope

IEEE Transactions on Biomedical Engineering contains basic and applied papers dealing with biomedical engineering. Papers range from engineering development in methods and techniques with biomedical applications to experimental and clinical investigations with engineering contributions.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Bin He
University of Minnesota