{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T12:13:04Z","timestamp":1774613584116,"version":"3.50.1"},"reference-count":12,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T00:00:00Z","timestamp":1774483200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Danish Colitis-Crohn Association"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Background\/Objectives: To prevent surgical site infections, it is important to consider the concentration of the administered antibiotic in the target compartment. We measured the concentrations of cefuroxime and metronidazole in peritoneal fluid with the microdialysis technique in patients undergoing surgery for secondary peritonitis (7 patients) and for inflammatory bowel disease (11 patients). Methods: All patients received 1.5 g of cefuroxime and 0.5 g of metronidazole every 8 h during the postoperative period for at least 72 h. Microdialysates covering 8-h intervals were collected, and the concentration of cefuroxime and metronidazole was measured using liquid chromatography\u2013mass spectrometry. Results: For metronidazole, a concentration of \u22654 \u03bcg\/mL was reached in all but one sample, corresponding to the minimal inhibitory concentration (MIC) for most anaerobic bacteria strains. For cefuroxime, a value of \u22654 \u03bcg\/mL was reached in 88% and 93% of the samples in the peritonitis group and the IBD group, respectively, corresponding to the MIC values for most Gram-negative bacteria, and a value of \u226516 \u03bcg\/mL, corresponding to the MIC value for more resistant bacteria, was reached in only 40% and 23% of the samples, respectively. Conclusions: Our results show that the peritoneal microdialysis method is feasible for studying the diffusion of antibiotics into the peritoneal cavity. Measuring the accumulative concentration of antibiotics in the peritoneal fluid corresponding to the drug administration interval may provide important information to consider alongside traditional pharmacodynamic parameters and may be relevant to achieving an optimal therapeutic effect.<\/jats:p>","DOI":"10.3390\/antibiotics15040340","type":"journal-article","created":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T11:12:25Z","timestamp":1774609945000},"page":"340","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Diffusion of Intravenously Administered Cefuroxime and Metronidazole into the Peritoneal Fluid During Postoperative Period in Patients with Secondary Peritonitis Compared to Controls: A Pilot Study Using Peritoneal Microdialysis"],"prefix":"10.3390","volume":"15","author":[{"given":"Kristine","family":"Jung","sequence":"first","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6550-7505","authenticated-orcid":false,"given":"Mark Bremholm","family":"Elleb\u00e6k","sequence":"additional","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0591-7187","authenticated-orcid":false,"given":"Per","family":"Damkier","sequence":"additional","affiliation":[{"name":"Research Unit for Clinical Pharmacology, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7274-8486","authenticated-orcid":false,"given":"Palle B. N.","family":"Fruekilde","sequence":"additional","affiliation":[{"name":"Department of Clinical biochemistry, Odense University Hospital, 5000 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0858-4269","authenticated-orcid":false,"given":"S\u00f6ren","family":"M\u00f6ller","sequence":"additional","affiliation":[{"name":"Research Unit for Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0028-8828","authenticated-orcid":false,"given":"Ester Maria","family":"Gill","sequence":"additional","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3108-8685","authenticated-orcid":false,"given":"Jonas Emil","family":"Sabroe","sequence":"additional","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne Riis","family":"Axelsen","sequence":"additional","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niels","family":"Qvist","sequence":"additional","affiliation":[{"name":"Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, 5230 Odense, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Eckmann, C., Kramer, A., Assadian, O., Flessa, S., Huebner, C., Michnacs, K., Muehlendyck, C., Podolski, K.M., Wilke, M., and Heinlein, W. 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Sci."}],"container-title":["Antibiotics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-6382\/15\/4\/340\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T11:23:19Z","timestamp":1774610599000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-6382\/15\/4\/340"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3,26]]},"references-count":12,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2026,4]]}},"alternative-id":["antibiotics15040340"],"URL":"https:\/\/doi.org\/10.3390\/antibiotics15040340","relation":{},"ISSN":["2079-6382"],"issn-type":[{"value":"2079-6382","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,3,26]]}}}