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Biomedical subjects

C J Cairns

Publications and source records attributed to C J Cairns.

5 recordsLinked to original sources
PubMed1998

The effect of 13 weeks of running training followed by 9 d of detraining on postprandial lipaemia.

The present study examined the influence of training, followed by a short period of detraining, on postprandial lipaemia. Fourteen normolipidaemic, recreationally active young adults aged 18-31 years participated, in two self-selected groups: three men and five women (BMI 21.7-27.6 kg/m2) completed 13 weeks of running training, after which they refrained from exercise for 9 d; three men and three women (BMI 21.5-25.6 kg/m2) maintained their usual lifestyle. Oral fat tolerance tests were conducted at baseline and again 15 h, 60 h and 9 d after the runners' last training session. Blood samples were drawn after an overnight fast and at intervals for 6 h after consumption of a high-fat meal (1.2 g fat, 1.4 g carbohydrate, 70.6 kJ energy/kg body mass). Heparin was then administered (100 IU/kg) and a further blood sample was drawn for measurement of plasma lipoprotein lipase (EC 3.1.1.34; LPL) activity. Endurance fitness improved in runners, relative to controls (maximal O2 uptake +3.2 (SE 1.1) ml/kg per min v. -1.3 (SE 1.2) ml/kg per min; P < 0.05). In the absence of the acute effect of exercise, i.e. 60 h after the last training session, there was no effect of training on either postprandial lipaemia or on post-heparin LPL activity. However, changes during 9 d of detraining in both these variables differed significantly between groups; after 2d without exercise (60 h test), the runners' lipaemic response was 37% higher than it was the morning after their last training session (15 h test; runners v. controls P < 0.05), with a reciprocal decrease in post-heparin LPL activity (P < 0.01). These findings suggest that improved fitness does not necessarily confer an effect on postprandial lipaemia above that attributable to a single session of exercise.

Adolescent↗
PubMed1996

The economics of a pharmacy-based central intravenous additive service for paediatric patients.

This study was designed to compare the costs of a pharmacy-based Central Intravenous Additive Service (CIVAS) with those of traditional ward-based preparation of intravenous doses for a paediatric population. Labour costs were derived from timings of preparation of individual doses in both the pharmacy and ward by an independent observer. The use of disposables and diluents was recorded and their acquisition costs apportioned to the cost of each dose prepared. Data were collected from 20 CIVAS sessions (501 doses) and 26 ward-based sessions (30 doses). In addition, the costs avoided by the use of part vials in CIVAS was calculated. This was derived from a total of 50 CIVAS sessions. Labour, disposable and diluent costs were significantly lower for CIVAS compared with ward-based preparation (p < 0.001). The ratio of costs per dose [in 1994 pounds sterling] between ward and pharmacy was 2.35:1 (2.51 pounds:1.07 pounds). Sensitivity analysis of the best and worst staff mixes in both locations ranged from 2.3:1 to 4.0:1, always in favour of CIVAS. There were considerable costs avoided in CIVAS from the multiple use of vials; the estimated annual sum derived from the study was 44,000 pounds. In addition, CIVAS was less vulnerable to unanticipated interruptions in work flow than ward-based preparation. CIVAS for children was more economical than traditional ward-based preparation, because of a cost-minimisation effect. Sensitivity analysis showed that these advantages were maintained over a full range of skill mixes. Additionally, significant savings accrued from the multiple use of vials in CIVAS.

Catheterization, Central Venous↗
PubMed1993

Comparative clinical, microbiologic, and economic audit of the use of oral ciprofloxacin and parenteral antimicrobials.

OBJECTIVE: To examine the use of oral ciprofloxacin and parenteral antimicrobials in the treatment of acute infection (respiratory tract, urinary tract, blood) in hospitalized patients, with particular reference to severity of infection, outcome, and associated economic implications of each treatment. DESIGN: A prospective, multicenter comparative audit was conducted in the UK over an 18-month period. The audit was undertaken by clinical pharmacists who reviewed the antimicrobial treatment of patients with infective episodes, who were receiving or could have received oral therapy. PARTICIPANTS: Clinical pharmacists who collated the data all are employed in teaching hospitals. MAIN OUTCOME MEASURES: Patients were identified for analysis by their type of infection, severity of illness, antimicrobial prescribed, route of administration, and response to therapy. Additionally, data on costs of the antimicrobials prescribed and the supplementary costs of drug administration were calculated. RESULTS: Four hundred eighty-five patients were enrolled for analysis; 208 of the patients had respiratory tract infection, 112 had urinary tract infection, 138 had septicemia, and 27 had mixed infections. Sepsis scores were applied to 152 patients receiving oral ciprofloxacin and 333 patients receiving parenteral antimicrobials and yielded mean scores of 5.9 (SD 3.1, range 1-13) and 8.7 (SD 4.2, range 1-22), respectively. Of 485 patients, 188 were paired according to sepsis score results and route of administration. Resolution occurred in 133 patients (79 receiving oral and 54 receiving parenteral therapy), further therapy was required in 49 (11 oral and 38 parenteral), and treatment was withdrawn in 6 (4 oral and 2 parenteral). Microbiologic assessment yielded positive results in 227 patients (47 percent). Drug acquisition costs (based on 1 UK pound = 1.80 US $) per course of treatment were $47.23 (SD $38.32, range 5.40-218.70) for the oral group and $173.70 (SD 209.77, range 2.11-1021.40) for the parenteral group. Overall costs for treatment courses were $74.00 (SD $52.81, range 8.10-309.17) and $305.59 (SD $304.70, range 14.69-1345.00) for the two groups, respectively (p < 0.001). CONCLUSIONS: This study suggest that, in patients with moderate infective episodes, oral ciprofloxacin may reduce overall treatment costs compared with the use of parenteral antimicrobial agents.

Adolescent↗
PubMed1982

Disopyramide pharmacokinetics during recovery from myocardial infarction.

1 Previous pharmacokinetics studies of disopyramide in patients with ischaemic heart disease include unexplained reports of poor bioavailability and extremely long elimination half-lives which undermine accepted dosage recommendations. 2 Disopyramide pharmacokinetics were investigated after intravenous and oral administration to nine such patients. 3 Mean elimination half-life (6.82 h) and bioavailability (79.8%) were consistent with findings from a previous study in young healthy volunteers. 4 Volume of distribution was reduced by 25%: the mean +/- s.d. value was 0.61 +/- 0.17 l/kg. Total body clearance was significantly reduced: the mean +/- s.d. value was 1.02 +/- 0.16 ml min-1 kg-1. 5 These figures indicate that, in this patient group, if renal function is not significantly impaired, a standard loading dose of 2 mg/kg should be followed by the appropriate maintenance dose administered three or four times daily.

Adult↗