PubMed HealthSearch

PubMed · 6380712

Local hyperthermia with interstitial techniques.

Abstract

The heating of deep visceral tumors with implanted electrodes and with self-regulating ferromagnetic thermoseeds was investigated. Clinical trials on six patients heated with implanted electrodes indicate that good local tumor control can be obtained by application of hyperthermia during a normal course of radiotherapy. The heating method was found practical, and neither toxicity nor severe patient discomfort was encountered. However, temperature inhomogeneity within the tumor volume remains a problem. Theoretical studies and an animal experiment indicate that temperature homogeneity can be largely improved by heating the tumor with thermoseeds made of an alloy of 70.4% nickel and 29.6% copper. The highly temperature-dependent rate of heat production in the vicinity of the Curie point, about 50 degrees for this material, provides automatic temperature regulation.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

I A Brezovich, W J Atkinson, M B Lilly. 1984. Local hyperthermia with interstitial techniques.. https://pubmed.ncbi.nlm.nih.gov/6380712/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

[New electronic methods for clinical measurement of temperature].

A proposed Norwegian ban on clinical thermometers containing mercury will affect the equipment available for clinical measurements of temperature. The basic technological principles and applications of electronic thermometers and infrared tympanic thermometers are reviewed and discussed.

Body Temperature

Selected problems of analysis and interpretation of the effects of sleep deprivation on temperature and performance rhythms.

One of the major methodological-analytic problems encountered by researchers in sleep deprivation involves the examination and analysis of the relationship between sleep loss and rhythmic influences on performance. The comparison of performance rhythms with physiological rhythms, e.g., body temperature, generated under the same conditions of sleep deprivation, has become an important means of testing for an endogenous source of the rhythmicity in the data and for clarifying the nature of the proposed oscillator system. Should the data sets be correlated before or after their separation into monotonic and rhythmic parts? Correlating the raw data without separating them into their components can yield negative results, while, in reality, some of the major underlying rhythms may be highly related. The example used in this chapter showed strong cross correlations of the circadian components of temperature and two performance tasks. Sleep deprivation is thus seen to interact with performance rhythms. This interaction is only revealed after the data are analyzed and broken into their component parts. This procedure leads to the conclusion that certain performance rhythms and temperature may share the same generating oscillators.

Body Temperature

Central-nervous-system dysfunction after warm or hypothermic cardiopulmonary bypass.

The increasing popularity of warm heart surgery led us to assess the effect of temperature during cardiopulmonary bypass (CPB) on neuropsychological function after coronary surgery. 34 patients enrolled in a randomised trial of normothermic versus hypothermic CPB were subjected to a battery of psychomotor and memory tests before and after their operations. The mean nasopharyngeal temperature for warm CPB was 34.7 (SD 0.5) degrees C and that for hypothermic CPB was 27.8 (2.0) degrees C. In all seven neuropsychological tests the postoperative scores were better in the warm CPB than in the hypothermic group, although only one difference achieved significance (trial-making test A; p less than 0.023). Thus, neurological function after normothermic CPB seems to be no worse than that after hypothermic procedures.

Body Temperature