Telephone Telemetry of Bioelectric Information

Levine, Irving; Jossmann, Paul B.; Tursky, Bernard; Meister, Melvin; DeAngelis, Vincent

doi:10.1001/jama.1964.03060350020004

Cited by 12 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We can then appreciate theoretically the error rate of transmission by calculating the PRD (percent root mean difference) of each lead signal, the RMSE (root mean square error) and the STD (standard deviation). The formulas for PRD, RMSE and STD are given by (13), (14) and (15), respectively.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…The clinical examination of the electroencephalogram (EEG) also requires that the doctor scrutinize several leads of the signal at a time. In the early 1960s, during the first steps of medical telemetry through the transmission of biomedical information via the telephone line, the need to transmit several leads of the EEG arose [14]. These pioneering works aimed to transmit just two or three leads.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of an optimized technique based on DS-CDMA for simultaneous transmission of multichannel biosignals

2017

View full text Add to dashboard Cite

Telemedicine is becoming increasingly, with applications in many areas of healthcare, such as home telecare of the elderly, diagnosis at a distance and robotic surgery. The simultaneous transmission of several leads of biomedical signals should be considered in telemedicine, given the many benefits it brings. Code division multiple access (CDMA) is a multiple access technique that enables users to transmit independent information simultaneously within the same bandwidth. The direct sequence CDMA (DS-CDMA) is a variant of the CDMA technique in which a pseudorandom sequence having a higher bandwidth than the information signal is used to modulate the information signal directly. Biomedical signals are confidential; thus, their transmission must be secured. In this paper we propose a protocol similar to DS-CDMA for the simultaneous transmission of all of the leads of some multichannel biomedical signals. We assigned orthogonal codes to different leads of a signal. The convolution of each lead with the code gives a signal spread over a broad frequency band. All of the spread signals are then mixed to produce a single composite signal. This composite signal is frequency modulated, amplified and transmitted. At the reception, inverse functions to the previous are developed to perform demodulation, demultiplexing and extraction of the physiological signals transmitted. We used the discrete Walsh functions as codes. The results obtained are satisfactory, even in situations where the noise disturbances are significant.

show abstract

Section: Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of an optimized technique based on DS-CDMA for simultaneous transmission of multichannel biosignals

2017

View full text Add to dashboard Cite

show abstract

“…Data links via the telephone network can be used to transmit physiological signals in analogue form to distant locations for visual inspection and evaluation or for processing by a digital computer (Levine et al, 1964). During the past five years experience has been gained in the practical operation of both analogue and digital data links between the Royal College of Surgeons and various hospitals in the London area and further afield.…”

mentioning

confidence: 99%

The Use of Analogue Telephone Data Links for the Transmission of Physiological Signals

Hill

Payne

1972

British Journal of Anaesthesia

View full text Add to dashboard Cite

A data link, operating on the frequency modulation principle, has been developed to transmit physiological signals in analogue form over the telephone network. The transmitted signals have included e.c.g. and e.e.g. complexes, arterial blood pressure and central venous pressure contours, pneumotachogram and plethysmogram waveforms and dye dilution curves, but virtually every physiological signal is suitable for this type of handling. Over the past two years the data link has been used regularly between St Peter's Hospital, Covent Garden, and the Research Department of Anaesthetics in the Royal College of Surgeons to facilitate computer processing of the physiological signals and up to three signals have been sent simultaneously. The successful use of this three-channel analogue data link combined with digital computer facilities provides a new dimension in clinical research and patient care. In particular the ability to process physiological signals on-line in real time offers the opportunity to improve the accuracy of measurements, to increase the number and range of physiological variables suitable for patient assessment and to develop more dependable methods for clinical evaluation.

show abstract

“…Patients were divided into two groups-one group of 5 was brought directly into the Outpatient Clinic Polygraph Laboratory for testing, while the remaining 10 were tested at home by means of telephone telemetry (telemedography ). [4][5][6][7] Selection was based essentially on severity of illness, those with more advanced disease remaining at home.…”

mentioning

confidence: 99%

Effect of 5‐imino‐2,2,4,4‐tetrakis (trifluoromethyn imidazolidine (EXP 338) on spasticity: A quantitative evaluation

Levine

Jossmann

Friend

et al. 1968

Clin Pharma and Therapeutics

Self Cite

View full text Add to dashboard Cite

In preclinical studies, 5-imino-2,2,4,4-tetrakis (trifluoromethyl) Departments of Neurological Research, Neuropsychiatric Examining Service, and Therapeutics, Veterans Adminiotration Outpatient ClinicThe structure of 5-imino-2,2.,4,4-tetrakis (triRuoromethyl) imidazolidine (EXP 338)" is shown in Fig. l,1 Preclinical studies revealed that this preparation is capable of reducing abnormal neural activity by its effect on polysynaptic reRex arcs and to a lesser degree upon monosynaptic circuits in experimental animals. No evidence of peripheral interference with neuromuscular transmission was found.8 Toxicology studies revealed no toxicity which would preclude clinical trial. Subsequently it was given to about 20 patients with neurologic diseases for 1 to 60 days without any apparent alterations in urine or blood. 2 Studies in mice with 14C-Iabeled drug indicated a half-life of 8 hours and that the drug was rapidly absorbed and uniformly distributed. 9 Adverse effects of drowsiness, disorientation, ataxia, and convulsions had followed single doses of 50 to 100 mg. of the test drug given orally.2Received for publication Dec. 19, 1967. Accepted for publication April 9, 1968. ·IND, DuPont, Wilmington. Del. 448A quantitative, non blind evaluation of oral EXP 338 was carried out on 15 pa-

show abstract

Telephone Telemetry of Bioelectric Information

Cited by 12 publications

References 2 publications

Simulation of an optimized technique based on DS-CDMA for simultaneous transmission of multichannel biosignals

Simulation of an optimized technique based on DS-CDMA for simultaneous transmission of multichannel biosignals

The Use of Analogue Telephone Data Links for the Transmission of Physiological Signals

Effect of 5‐imino‐2,2,4,4‐tetrakis (trifluoromethyn imidazolidine (EXP 338) on spasticity: A quantitative evaluation

Contact Info

Product

Resources

About