Showing papers by "George Davey Smith published in 1982"
TL;DR: There were no significant differences between analgesic regimens in respect of subjective linear analogue pain scores or static and dynamic lung volumes assessed at 24 and 48 h after operation and 5 days after operation in patients who underwent upper abdominal surgery.
Abstract: One hundred and twenty-six patients undergoing upper and lower abdominal surgery were studied after operation to compare the analgesic effects of 1.m morphine, sublingual buprenorphine and self-administered 1 v. pethidine by Cardiff Palliator There were no significant differences between analgesic regimens in respect of subjective linear analogue pain scores or static and dynamic lung volumes assessed at 24 and 48 h after operation and 5 days after operation in patients who underwent upper abdominal surgery. Sublingual buprenorphine produced more nausea and sedation than the other two treatments, but the differences were not clinically important However, it offered considerable advantages in terms of ease of administration.
71 citations
TL;DR: Morphine sulphate tablets produced satisfactory postoperative analgesia compared with intramuscular morphine: both regimens were acceptable to the patients.
Abstract: Fifty patients undergoing hysterectomy or cholecystectomy took part in a trail of postoperative analgesia provided by either intramuscular morphine or controlled-release morphine sulphate tablets orally. Respiratory function and plasma catecholamine concentrations were measured after operation and pain was assessed by using a linear analogue scoring method. Controlled-release morphine sulphate produced comparable pain relief with that of intramuscular morphine, and depression of respiratory function after operation was similar with the two analgesic regimens. The mean total dose of drug per patient given over 48 h to patients undergoing hysterectomy was 115 mg for morphine sulphate and 53 mg for morphine. Patients undergoing cholecystectomy received 130 mg morphine sulphate or 76 mg morphine. There was more sedation after operation in those patients undergoing hysterectomy who received morphine sulphate tablets. Morphine sulphate tablets produced satisfactory postoperative analgesia compared with intramuscular morphine: both regimens were acceptable to the patients.
47 citations
01 Jan 1982
TL;DR: In this paper, the existence of surface waves in a semi-infinite body with traction-free boundary composed of an arbitrary anisotropic elastic material is investigated, and the results are applied to three particular configurations of the boundary and surface wave normals.
Abstract: Summary In Part I of this article a programme is formulated for investigating the existence of surface waves in a semi-infinite body with traction-free boundary composed of an arbitrary anisotropic elastic material. Part II describes in detail the realization of this programme for materials with cubic symmetry, and the results are applied in Part III, first to the general existence problem, then to three particular configurations of the boundary and surface wave normals which display features of especial interest and have previously been the subject of numerical studies. Although intended primarily as a contribution to the theory of elastic surface waves, the article gives extensive consideration to body waves and provides, inter alia , a more complete account of slowness surfaces and acoustic polarization fields for cubic media than has been available hitherto.
44 citations
3 citations
TL;DR: In this paper, the analysis of silicon surfaces in a Time-of-Flight Atom Probe is presented, and a comparison is made between the chemical data obtained from conventional voltage pulse and laser pulse desorption.
1 citations
01 Jan 1982
TL;DR: The experimental techniques of atom probe time of flight mass spectrometry, field emission STEM X-ray microanalysis and electron probe microanalysis have been used to investigate the composition and stability of the various phases in alloy IN939 as a function of heat treatment and long term exposure as discussed by the authors.
Abstract: The experimental techniques of atom probe time of flight mass spectrometry, field emission STEM X-ray microanalysis and electron probe microanalysis have been used to investigate the composition and stability of the various phases in alloy IN939 as a function of heat treatment and long term exposure. The results show a need for some refinement of phase stability calculations, in particular to take into account the effects of casting segregation and of different exposure conditions.
1 citations
TL;DR: The use of a Time-of-Flight Atom Probe in the analysis of silicon surfaces, and the interfaces between metals and silicon, promises to provide very accurate chemical analysis allied with structural information from Field Ion Microscopy images.
Abstract: The use of a Time-of-Flight Atom Probe in the analysis of silicon surfaces, and the interfaces between metals and silicon, promises to provide very accurate chemical analysis allied with structural information from Field Ion Microscopy images. This paper presents results on the analysis of silicon surfaces by this technique,showing that good spectra can be obtained without difficulty. Some preliminary experiments on the structure of such specimens after the deposition of thin layers of Pd and Ni will be described,concentrating on the analysis of the stoichiometry of the reacted layers.