Ultra-wideband electromagnetic pulses: Lack of effects on heart rate and blood pressure during two-minute exposures of rats

Abstract

Exposure to fast‐rise‐time ultra‐wideband (UWB) electromagnetic pulses has been postulated to result in effects on biological tissue (including the cardiovascular system). In the current study, 10 anesthetized Sprague‐Dawley rats were exposed to pulses produced by a Sandia UWB pulse generator (average values of exposures over three different pulse repetition rates: rise time, 174–218 ps; peak E field, 87–104 kV/m; pulse duration, 0.97–0.99 ns). Exposures to 50, 500 and 1000 pulses/s resulted in no significant changes in heart rate or mean arterial blood pressure measured every 30 s during 2 min of exposure and for 2 min after the exposure. The results suggest that acute UWB whole‐body exposure under these conditions does not have an immediate detrimental effect on these cardiovascular system variables in anesthetized rats. Bioelectromagnetics 19:330–333, 1998. Published 1998 Wiley‐Liss, Inc.

Wearable System-on-a-Chip Pulse Radar Sensors for the Health Care: System Overview

“…Moreover, the UWB pulses have a very low-density spectrum that, if compared with the narrow band conterparts, reduce drastically the risk of cellular ionization on the animal and human beings [6]- [11]. In addition, since UWB transceivers present a lower circuit complexity, the requirements in term of power consumption are mitigated, and this allows us to maximize the energy saving for a longer life of the battery.…”

Services to Operate and Maintain the Microwave Research Facility at Brooks Air Force Base, San Antonio, Texas

“…However, two different approaches have been used [Jauchem et al 1998]. Jauchem's group used ketamine-anesthetized (150 mg/kg, a rather high dose) and cannulated rats as a model to evaluate the X TWR effects on heart Täte and blood pressure during exposure and immediately after exposure.…”

“…None of these experiments included a sham-exposed group. Jauchem et al [1998] also utilized the "Sandia" exposure system for rats. The experimental conditions were sham, 50 pps (104 kV/m peak, 0.97 ns pulse duration, 177 ps rise time and 7.4 mW/kg estimated whole-body average SAR), 500 pps (102 kV/m peak, 0.97 ns pulse duration, 174 ps rise time and 71 mW/kg estimated whole-body average SAR) and 1,000 pps (87 kV/m peak, 0.99 ns pulse duration, 218 ps rise time and 114 mW/kg estimated whole-body average SAR).…”

“…An exposure of 2 min or less causes no effect on blood pressure and heart rate or on certain behaviors Jauchem et al, 1998Jauchem et al, , 1999. An exposure of 6 min causes hypotension in rats that persists for at least 4 weeks [Lu et al, 1998].…”

Health and safety of radio frequency radiation: U.S. military research and exposure standards

“…Our investigations have included tests of cellular biochemistry in human cells, genotoxicity in yeast cells, sensation thresholds in mice, anxiety, central nervous system activity, reproduction, fertility, cardiovascular function [7], teratology, behavior in rats, and behavior in monkeys [8]. No hazardous effects of exposures up to 250 kVlm have been found, but some positive bioeffects effects are being reinvestigated.…”