CONTinuous Infusion Versus Intermittent Dosing of ceftaZidime/AVIbactam in Critically Ill Patients
NCT ID: NCT06811727
Last Updated: 2025-04-22
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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NOT_YET_RECRUITING
PHASE4
140 participants
INTERVENTIONAL
2025-05-01
2027-08-01
Brief Summary
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This single-centre, randomized, open-label trial will be conducted at a tertiary care hospital within the University Hospital Centre in Zagreb, Croatia, with a 1:1 allocation ratio. One hundred forty critically ill ICU patients requiring CZA treatment will be randomized to receive either ID (2 g/0.5 g every 8 hours over 2 hours) or an equivalent dose in CI (6 g/1.5 g continuously over 24 hours).
The primary outcome is the microbiological success rate. Secondary outcomes include clinical success rate, time to symptom improvement, length of ICU and hospital stay, 28-day all-cause mortality, pathogen recurrence rate, time to weaning from mechanical ventilation, cumulative vasoactive-inotropic score, adverse events, and the ratio of ceftazidime plasma concentration to the pathogen's minimum inhibitory concentration (C/MIC).
This trial seeks to provide evidence on the optimal administration strategy for CZA in critically ill ICU patients with severe infections due to MDR G- pathogens.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Study Groups
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Continuos ceftazidime/avibactam infusion
Continuous infusion will include a loading dose of 2 g/0.5 g administered over 2 hours, followed by continuous infusion of 6 g/1.5 g over 24 hours, equivalent to 0.25 g of ceftazidime per hour. The drug reconstitution and dilution process are shown in Figure 2. The final volume of a solution of CZA will be 50 mL, which gives the concentration of ceftazidime 40 mg/mL, with a 4:1 concentration ratio for avibactam (10 mg/mL). The solution will be administered via an infusion syringe with an infusion rate of 6.25 mL/h. Dose adjustments will be applied according to renal function, calculated using the Cockroft-Gault formula
Continuos ceftazidime/avibactam infusion
Continuous infusion will include a loading dose of 2 g/0.5 g administered over 2 hours, followed by continuous infusion of 6 g/1.5 g over 24 hours, equivalent to 0.25 g of ceftazidime per hour. The drug reconstitution and dilution process are shown in Figure 2. The final volume of solution of CZA will be 50 mL, which gives concentration of ceftazidime of 40 mg/mL, with 4:1 concentration ratio for avibactam (10 mg/mL). The solution will be administered via an infusion syringe, with an infusion rate of 6.25 mL/h. Dose adjustments will be applied according to renal function, calculated using Cockroft-Gault formula
Intermitent dosing as per SMPC
Intermittent dosing, as outlined in the SmPC, consists of 2 g/0.5 g administered by prolonged infusion over 2 hours every 8 hours. Dose adjustments will be applied according to renal function, calculated using the Cockroft-Gault formula.
Intermitent dosing as per SMPC
Intermittent dosing, as outlined in the SmPC, consists of 2 g/0.5 g administered by prolonged infusion over 2 hours every 8 hours. Dose adjustments will be applied according to renal function, calculated using Cockroft-Gault formula.
Interventions
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Continuos ceftazidime/avibactam infusion
Continuous infusion will include a loading dose of 2 g/0.5 g administered over 2 hours, followed by continuous infusion of 6 g/1.5 g over 24 hours, equivalent to 0.25 g of ceftazidime per hour. The drug reconstitution and dilution process are shown in Figure 2. The final volume of solution of CZA will be 50 mL, which gives concentration of ceftazidime of 40 mg/mL, with 4:1 concentration ratio for avibactam (10 mg/mL). The solution will be administered via an infusion syringe, with an infusion rate of 6.25 mL/h. Dose adjustments will be applied according to renal function, calculated using Cockroft-Gault formula
Intermitent dosing as per SMPC
Intermittent dosing, as outlined in the SmPC, consists of 2 g/0.5 g administered by prolonged infusion over 2 hours every 8 hours. Dose adjustments will be applied according to renal function, calculated using Cockroft-Gault formula.
Eligibility Criteria
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Inclusion Criteria
1. Age above or equal to 18 years of age.
2. Able to provide informed consent personally or by his/her next of kin, as requested by the Ethics Committee.
2. Disease-specific
1. Critically ill patients requiring admission to the intensive care unit (medical or surgical).
2. Diagnosed with severe infections.
3. At least one microbiological sample positive for Klebsiella pneumoniae OXA-48 or Pseudomonas aeruginosa.
4. Requiring a prescription for ceftazidime/avibactam, by clinical judgement
Exclusion Criteria
1. Known or suspected hypersensitivity to ceftazidime/avibactam, excipients, or any other cephalosporin antibacterial agent. Severe hypersensitivity (e.g. anaphylactic reaction, severe skin reaction) to any other β-lactam antibacterial agent (e.g. penicillins, monobactams or carbapenems).
2. Withdrawal of informed consent.
3. Age above 85 years of age.
4. Female who is pregnant or breast-feeding.
5. Participation (i.e. signed informed consent) in any other interventional clinical trial of an approved or non-approved antibacterial agent within 30 days before screening.
6. Any disorder which, in the investigator's opinion, might jeopardize the participant's safety or compliance with the protocol.
2. Laboratory values
1\. Severe neutropenia before or during ceftazidime/avibactam administration.
3. Medical conditions
1. Death within 48 hours following randomization.
2. Concomitant acquired immunodeficiency syndrome.
3. Presence or history of malignant neoplasms or in situ carcinomas.
4. Duration of ceftazidime/avibactam administration is shorter than 72 hours.
18 Years
85 Years
ALL
No
Sponsors
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UHC Zagreb, Zagreb, Croatia
OTHER_GOV
Daniel Lovrić
UNKNOWN
Mirna Momčilović
UNKNOWN
Ivan Šitum, MD
OTHER
Responsible Party
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Ivan Šitum, MD
subinvestigator
Central Contacts
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References
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Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods. 2007 May;39(2):175-91. doi: 10.3758/bf03193146.
Servais H, Tulkens PM. Stability and compatibility of ceftazidime administered by continuous infusion to intensive care patients. Antimicrob Agents Chemother. 2001 Sep;45(9):2643-7. doi: 10.1128/AAC.45.9.2643-2647.2001.
Gatti M, Pea F. Continuous versus intermittent infusion of antibiotics in Gram-negative multidrug-resistant infections. Curr Opin Infect Dis. 2021 Dec 1;34(6):737-747. doi: 10.1097/QCO.0000000000000755.
Adembri C, Novelli A, Nobili S. Some Suggestions from PK/PD Principles to Contain Resistance in the Clinical Setting-Focus on ICU Patients and Gram-Negative Strains. Antibiotics (Basel). 2020 Oct 6;9(10):676. doi: 10.3390/antibiotics9100676.
Lorente L, Jimenez A, Palmero S, Jimenez JJ, Iribarren JL, Santana M, Martin MM, Mora ML. Comparison of clinical cure rates in adults with ventilator-associated pneumonia treated with intravenous ceftazidime administered by continuous or intermittent infusion: a retrospective, nonrandomized, open-label, historical chart review. Clin Ther. 2007 Nov;29(11):2433-9. doi: 10.1016/j.clinthera.2007.11.003.
Gomez CM, Cordingly JJ, Palazzo MG. Altered pharmacokinetics of ceftazidime in critically ill patients. Antimicrob Agents Chemother. 1999 Jul;43(7):1798-802. doi: 10.1128/AAC.43.7.1798.
Muller AE, Punt N, Mouton JW. Optimal exposures of ceftazidime predict the probability of microbiological and clinical outcome in the treatment of nosocomial pneumonia. J Antimicrob Chemother. 2013 Apr;68(4):900-6. doi: 10.1093/jac/dks468. Epub 2012 Nov 28.
Ali A, Imran M, Sial S, Khan A. Effective antibiotic dosing in the presence of resistant strains. PLoS One. 2022 Oct 10;17(10):e0275762. doi: 10.1371/journal.pone.0275762. eCollection 2022.
Ghazi IM, El Nekidy WS. Editorial: Advances in antimicrobial therapy and combating resistance. Front Pharmacol. 2023 Mar 16;14:1170289. doi: 10.3389/fphar.2023.1170289. eCollection 2023. No abstract available.
Batchelder JI, Hare PJ, Mok WWK. Resistance-resistant antibacterial treatment strategies. Front Antibiot. 2023;2:1093156. doi: 10.3389/frabi.2023.1093156. Epub 2023 Jan 30.
Poole K. Pseudomonas aeruginosa: resistance to the max. Front Microbiol. 2011 Apr 5;2:65. doi: 10.3389/fmicb.2011.00065. eCollection 2011.
Bonomo RA, Burd EM, Conly J, Limbago BM, Poirel L, Segre JA, Westblade LF. Carbapenemase-Producing Organisms: A Global Scourge. Clin Infect Dis. 2018 Apr 3;66(8):1290-1297. doi: 10.1093/cid/cix893.
Chen T, Xu H, Chen Y, Ji J, Ying C, Liu Z, Xu H, Zhou K, Xiao Y, Shen P. Identification and Characterization of OXA-232-Producing Sequence Type 231 Multidrug Resistant Klebsiella pneumoniae Strains Causing Bloodstream Infections in China. Microbiol Spectr. 2023 Mar 22;11(2):e0260722. doi: 10.1128/spectrum.02607-22. Online ahead of print.
Garcia-Gonzalez N, Fuster B, Tormo N, Salvador C, Gimeno C, Gonzalez-Candelas F. Genomic analysis of the initial dissemination of carbapenem-resistant Klebsiella pneumoniae clones in a tertiary hospital. Microb Genom. 2023 Jun;9(6):mgen001032. doi: 10.1099/mgen.0.001032.
Ceron S, Salem-Bango Z, Contreras DA, Ranson EL, Yang S. Clinical and Genomic Characterization of Carbapenem-Resistant Klebsiella pneumoniae with Concurrent Production of NDM and OXA-48-like Carbapenemases in Southern California, 2016-2022. Microorganisms. 2023 Jun 30;11(7):1717. doi: 10.3390/microorganisms11071717.
European Medicines Agency (EMA). Summary of Product Characteristics - Zavicefta 2 g/ 0.5 g powder for concentrate for solution for infusion. https://www.ema.europa.eu/en/documents/product-information/zavicefta-epar-product-information_en.pdf. (accessed 9.11.2024.)
Momcilovic M, Situm I, Erceg A, Siroglavic M, Lovric M, Nizic Nodilo L, Hafner A, Lovric J, Turcic P, Fabijanovic D, Marinic A, Nedeljkovic V, Pasalic M, Percin L, Sipus D, Milicic D, Lovric D. Continuous infusion versus intermittent dosing of ceftazidime/avibactam in critically ill patients with Klebsiella pneumoniae OXA-48 or Pseudomonas aeruginosa infections: a single-center randomized open-label trial (ZAVICONT). Rationale and design. Front Pharmacol. 2025 Aug 7;16:1618987. doi: 10.3389/fphar.2025.1618987. eCollection 2025.
Other Identifiers
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ZAVICONT01
Identifier Type: -
Identifier Source: org_study_id
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