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Biomedical subjects

J P Beavis

Publications and source records attributed to J P Beavis.

12 recordsLinked to original sources
PubMed1978

Plasma, bone, hip capsule and drain fluid concentrations of ampicillin and flucloxacillin during total hip replacement after intravenous bolus injection of magnapen.

1. A rapid intravenous bolus injection of 4.0 g Magnapen (which contains 2.0 g of ampicillin and 2.0 g of flucloxacillin) was to seven patients undergoing total hip replacement immediatly before induction of general anesthesia. Postoperatively the patients patients received 2.0 g Magnapen by intramuscular injection every 6 h for up to 72 h until removal of the wound drains. 2. The plasma, bone, hip capsule and drain fluid concentrations of ampicillin and flucloxacillin were measured by a differential small plate microbiological assay method using Sarcina lutea and a penicillinase producing Staph. aureus Russell as the test organisms. 3. The mean +/- s.e. mean concentrations of ampicillin after this regimen were 4222.2 +/- 285.0 microgram/ml (plasma), 65.6 +/- 1.3 microgram (g (hip capsule), 19.1 +/- 3.8 microgram/g (cancellous bone), and 211.1 +/- 65.6 microgram/g (ground up bone) respectively. 4. The mean +/- s.e. mean flucloxacillin concentrations after this regime were 137.2 +/- 28.4 microgram/ml (plasma), 61.8 +/- 15.0 microgram/g (hip capsule), 47.1 +/- 9.5 microgram/g (cancellous bone) and 139.4 +/- 21.8 microgram/g (ground up bone) respectively. 5. An intravenous bolus injection of Magnepen (4.0 g), given immediately before induction of general anaesthesia, provides concentrations of ampicillin and flucloxacillin in plasma, hip capsule, cancellous and ground up bone, and drain fluid that exceed the MICs of these antibiotics against Staph. aureus and E. coli. 6. The plasma, hip capsule, cancellous and ground up bone concentrations of ampicillin after this dose of Magnapen do not, however, exceed the MICs of the Gram negative anaerobes that sometimes cause postoperative wound infections in these patients.

Aged↗
PubMed1977

Plasma, bone, hip capsule, synovial and drain fluid concentrations of lincomycin during total hip replacement.

1 Lincomycin (600 mg) was given 6 h preoperatively by intramuscular injection, as an intravenous infusion over 30 min and for 72 h postoperatively in twelve patients having total hip replacement. 2 The plasma, bone, hip capsule, synovial and drain fluid concentrations of lincomycin were almost always above the M.I.C. of lincomycin against penicillinase producing Staphylococcus aureus. 3 There was a good correlation between the estimated concentrations of lincomycin in bone by the grinding and agitation methods of analysis. 4 Two patients developed pseudomembranous colitis after parenteral lincomycin.

Adult↗
PubMed1976

Colitis and diarrhoea: a problem with antibiotic therapy.

During a 19-month study the incidence of diarrhoea and colitis was estimated in 1158 orthopaedic inpatients admitted to the Guy's group of hospitals. The highest incidence of diarrhoea followed the use of lincomycin (22.2 per cent), ampicillin with cloxacillin (17.2 per cent), clindamycin (15.3 per cent) and combined therapy with cloxacillin and tetracycline (12.5 per cent). There were 3 documented cases of colitis; 2 followed lincomycin and 1 clindamycin. The incidence and relationship of antibiotic-related diarrhoea and colitis to possible aetiological factors are discussed. In orthopaedic inpatients, in whom lincomycin and clindamycin are often the antibiotics of choice, their continued use appears to be fully justified by the low incidence of colitis. However, if a patient receiving treatment with either of these antibiotics does develop diarrhoea, the antibiotic should be discontinued immediately, to reduce the risk of subsequent colitis.

Adolescent↗