Search PubMed⌕ Search

Biomedical subjects

D Orchard

Publications and source records attributed to D Orchard.

7 recordsLinked to original sources

Comparison of moxifloxacin and cefuroxime axetil in the treatment of acute maxillary sinusitis. Sinusitis Infection Study Group.

The aim of this prospective, multicenter, randomized, double-masked clinical trial was to compare the efficacy and safety of moxifloxacin with those of cefuroxime axetil for the treatment of community-acquired acute sinusitis. Five hundred forty-two adult patients with symptoms and radiographic evidence of acute maxillary sinusitis received a 10-day oral regimen of either moxifloxacin (400 mg once daily) or cefuroxime axetil (250 mg twice daily). Acute signs and symptoms at presentation had lasted >7 days but <4 weeks. Clinical response at the end of therapy (7 to 14 days after treatment) was the primary efficacy variable. Four hundred fifty-seven of the patients (223 moxifloxacin, 234 cefuroxime axetil) were included in the clinical efficacy analysis. Moxifloxacin was found to be similar in effectiveness to cefuroxime axetil at the end-of-therapy visit (90% vs. 89%, respectively; 95% confidence interval, -5.1% to 6.2%). Clinical relapse at the follow-up visit was reported for only 8 patients (3 moxifloxacin, 5 cefuroxime axetil). No clinically significant differences were observed with respect to the number of patients experiencing a successful clinical response based on demographic or infection characteristics. Five of the 542 enrolled patients were lost to follow-up. Of the 537 patients in the intent-to-treat population, drug-related adverse events were reported in 37% of moxifloxacin-treated patients and in 26% of cefuroxime axetil-treated patients (P = 0.006). Adverse-event profiles were comparable in the 2 treatment groups, with the exception of nausea, which was reported by 11% of moxifloxacin-treated patients compared with 4% of cef uroxime axetil-treated patients (P = 0.003). In this study, moxifloxacin was as effective as cefuroxime axetil in the treatment of community-acquired acute sinusitis.

Acute Disease↗

The problem of generalizing to a language population: a "random" controversy.

The rationale behind the use of item statistics as well as objections to their use are reviewed. It is argued that investigators conducting language research with disordered populations should follow the example of those conducting language research with normal populations and consider calculating item statistics if they wish their results to generalize beyond the specific items tested.

Aphasia↗

A 31P-NMR study of mono- and dimagnesium complexes of adenosine 5'-triphosphate and model systems.

31P-NMR chemical shifts and spin-lattice relaxation times of ATP (adenosine 5'-triphosphate), ribose 5'-triphosphate and tripolyphosphate show closely similar behaviour in aqueous solution at pH 7.5 on titration with Mg2+. The results are interpreted in terms of formation of 1 : 1 and 2 : 1 (dimagnesium) complexes with Mg2+ bound exclusively to the triphosphate chain. Stability constants for these complexes are reported. It is suggested that the predominant form of the 1 : 1 complexes has Mg2+ bound in tridentate manner (via non-bridging oxygen) to the alpha, beta and gamma phosphorus atoms; whilst that of the 2 : 1 complexes has each Mg2+ bound in bidentate manner, one to the alpha and beta, and the other to the beta and gamma, phosphorus positions.

Adenosine Triphosphate↗

Nitrogenase of Klebsiella pneumoniae. Water proton NMR relaxation studies on the binding of divalent metal ions and nucleotides to the iron protein.

Interactions between the iron protein, Kp2, of nitrogenase manganese ions, magnesium ions, and the nucleotides ATP or ADP, have been studied in aqueous solution by monitoring the water proton NMR relaxation rate enhancement caused by Mn2+. Binding of Mn2+ to a molecule of Kp2 occurs at four sites, indistinguishable within experimental error, having a Kd = 350 +/- 50 micron. The Mn2+ - Kp2 complex has a low characteristic enhancement (epsilonb = 6 +/- 0.5). All four sites can alternatively bind Mg2+, not necessarily with the same dissociation constant, but with a mean Kd = 1.7 +/- 0.3 mM. Ternary complexes with the configuration EMS or (formula: see text) are formed between Kp2, Mn2+ and nucleotide (ATP or ADP). The ternary complexes with Mg2+ in place of Mn2+ probably have the latter configuration. A novel treatment of enhancement data (a 'high metal' approximation) is given.

Adenosine Diphosphate↗

Doctors' autonomy.

Explore the source record for details and available documents.

Professional Autonomy↗