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Biomedical subjects

G N Volans

Publications and source records attributed to G N Volans.

At least 55 records · Page 3Linked to original sources
PubMed1983

Acute poisoning with ibuprofen.

1 Seventy five cases of ibuprofen overdose were recorded during a two year survey. 2 Details of the symptoms, treatment and the eventual outcome are known for 64% of the cases. The majority of the patients had no symptoms or only mild symptoms such as nausea or vomiting. 3 In the three cases where more serious symptoms were reported, the role of ibuprofen was not certain. 4 Laboratory analyses available for 13 cases demonstrate that plasma ibuprofen concentrations of up to 704 mg/l could be associated with no symptoms. 5 The data suggest that ibuprofen is of low toxicity in acute overdose and that therapy used should be supportive only.

Acute Disease↗
PubMed1983

Plasma mercury during prolonged acute renal failure after mercuric chloride ingestion.

Serial measurements of plasma mercury were made in a patient with severe and prolonged acute renal failure due to poisoning with mercuric chloride. An initial mercury concentration in whole blood of 1200 micrograms/l (6 mumol/l) was recorded, and recovery of renal function coincided with a fall in plasma mercury concentration to below 100 micrograms/l (0.5 mumol/l). The case demonstrates that survival and recovery of renal function is possible despite very high concentrations of mercury in the blood and oliguric renal failure of nearly six weeks' duration.

Acute Kidney Injury↗
PubMed1982

Hazards of household cleaning products.

1 All enquiries received by the London Centre of the National Poisons Information Service [NPIS(L)] relating to household cleaning products were followed up by questionnaire for a 4-month period from November 1978 to February 1979. 2 130 reports (43% of total followed-up) were received. 3 The incidence of misuse of household cleaning products has remained largely unchanged since a less detailed survey was performed in 1974-1975. 4 The source of enquiries, age groups and products involved were similar to the earlier survey. 5 Sixty-two per cent of cases were asymptomatic and no serious or life-threatening reactions were reported. 6 Although an increasing number of patients were admitted to hospital, little treatment was needed and the use of gastric lavage and aspiration had declined markedly. 7 Household cleaning products in the UK still cause no serious poisoning when misused or accidentally ingested.

Adolescent↗
PubMed1982

Pharmacokinetics of oral indoramin.

A randomized crossover study was carried out in 7 healthy subjects to investigate the pharmacokinetics of indoramin from two oral formulations (film-coated and uncoated 50 mg tablets) and to determine the effect of a standard mean on the plasma concentration time curve of the film-coated form. The results indicated that peak plasma concentrations occurred in 1 to 4 hours after treatment with a single dose of 2 tablets, with an overall elimination half-life of 5 hours. No significant differences could be shown between treatments in any of the pharmacokinetic variables determined. However, administration of film-coated indoramin after a standard meal narrowed the range of peak concentrations but the time at which peak concentrations of the drug occurred did not appear to be related to whether or not indoramin was given after the meal.

Administration, Oral↗
PubMed1981

Value of toxicological investigation in the diagnosis of acute drug poisoning in children.

In the 2 years 1978 and 1979 specimens from 287 children aged between 10 days and 14 years were received for general toxicological investigations. Of the 95 (33%) cases of confirmed poisoning, the diagnosis was established as a direct result of the analyses in 48 patients. No diagnosis was made in at least 85 (30%) of the remaining cases. Benzodiazepines were the drugs most commonly encountered (33%), followed by barbiturates, glutethimide, and meprobamate (15%), salicylate and paracetamol (15%), tricyclic antidepressants (12%), and ethanol (11%). 36 patients were severely poisoned (grade 3 or 4 coma, or convulsions), although only 1 patent died. There was evidence that drug(s) had been administered without authorisation in at least 7 instances, and in 51 (54%) of the poisoned patients there was sufficient concern about the safety of the child or the mode of administration of the drug(s) to institute legal proceedings (8 cases), involve the social services (25 cases), or arrange further medical appointments (18 cases). Drugs are readily available in most households and offer a means of inflicting injury that is less easily detectable than physical assault. For this reason, comprehensive toxicological investigations should be considered in children not only when they may assist in management but also in the presence of unusual or unexplained symptoms which could be drug-induced.

Adolescent↗
PubMed1981

National Poisons Information Services: report and comment 1980.

The National Poisons Information Services (NPIS) covering the United Kingdom and the Republic of Ireland currently receive over 40,000 telephone inquiries a year. Over the years there has been little change in the proportion of inquiries related to each of the main categories of poisons (drugs, household, chemical, agricultural, animals, and plants). More detailed analysis, however, shows pronounced changes in the inquiries relating to specific types of poisoning, particularly with drugs. By monitoring these trends and assessing the risks of toxicity, the NPIS has an important role in informing the medical profession of the need for preventive measures and for improved methods of treatment. At present, the NPIS cannot make full use of the available data due to inadequate staffing and lack of computer facilities. It is argued that for a modest increase in funding a much more comprehensive service could be provided.

Adolescent↗
PubMed1980

Acute poisoning due to Wright's vaporizing fluid.

A 3-year survey is reported of acute poisoning by Wright's Vaporizing Fluid which covered a change in formulation from 90% cresol to 10% chlorocresol. Of 160 children (average age 2.5 years) and 12 adults, 21.5% had moderate symptoms, 7.5% had severe symptoms and one child died. Where incidents involved the old formulation very few patients escaped without symptoms and over 50% of thm had skin burns or moderate systemic symptoms. With the new formulation over 50% of the patients were asymptomatic and skin burns were uncommon. However there was no significant difference in the incidence of severe systemic symptoms between the formulations. The new formulation appears safer when small amounts of the fluid are ingested, but when larger amounts are involved it is potentially lethal. The case history of the fatal poisoning is presented.

Acute Disease↗
PubMed1980

Preliminary experience with diacetylrhein in the treatment of osteoarthritis.

A single-blind, placebo controlled study was carried out over a 12-week period in 12 patients with osteoarthritis of the hip or knee to assess the effectiveness of 50 mg diacetylrhein per day. The 4 weeks of active treatment were preceded and followed by periods on placebo. Response to treatment as assessed by pain score, walking time and the number of 'rescue' analgesic tablets (paracetamol) consumed showed that 6 patients improved, 4 were unchanged and 2 deteriorated. Improvement was not apparent for several weeks after starting active treatment and remission lasted for 2 weeks to 3 or more months after the drug was withdrawn. The action of diacetylrhein is not yet established, but it does not appear to be related to analgesia or inhibition of prostaglandin synthetase activity. It is considered that further studies of this interesting drug are warranted to determine the most effective dose and duration of treatment.

Aged↗
PubMed1979

A schedule for combined intravenous and oral dosing with mexiletine.

A combined intravenous and oral dosage regime for mexiletine has been evaluated in volunteer subjects. Therapeutically effective plasma concentrations of the drug were achieved rapidly and maintained over a four-hour period. Side-effects were minimal and the scheme would be suitable for the anti-arrhythmic protection of patients being transported to hospital and for the treatment of patients receiving hospital or, even, domicilliary care.

Administration, Oral↗