Clinical Study on Monitoring the Plasma Concentration of Ceftazidime-Avibactam in Critically Ill Patients

September 8, 2026 updated by: First Affiliated Hospital of Zhejiang University
This prospective observational study is conducted at the First Affiliated Hospital of Zhejiang University School of Medicine from June 1, 2021 to January 1, 2024. The study aims to characterize the population pharmacokinetics of ceftazidime (CAZ) and avibactam (AVI) in critically ill patients receiving ceftazidime-avibactam (CAZ-AVI), including patients with and without renal replacement therapy (RRT). Plasma concentrations of CAZ and AVI will be measured after the first-dose and steady-state administrations. Population pharmacokinetic and pharmacokinetic/pharmacodynamic target-attainment analyses will be performed to explore dosing strategies according to renal function and RRT status.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a prospective, single-center observational cohort study of critically ill adult patients receiving CAZ-AVI for carbapenem-resistant organism (CRO) infections. Arterial blood samples (3 mL) will be collected at 0, 1, 2, 4, 6, and 8 hours after the first-dose and steady-state CAZ-AVI infusions. Blood samples will be centrifuged at 4°C and 4000 rpm for 10 min, and the separated plasma will be stored at -80°C until measurement of ceftazidime (CAZ) and avibactam (AVI) concentrations. Plasma concentrations of CAZ and AVI will be quantified using ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF). Clinical and laboratory characteristics will be recorded, together with RRT-related treatment parameters in patients receiving RRT. Population pharmacokinetic(PPK) models of CAZ and AVI will be developed using the collected concentration and clinical data.The resulting PPK models will subsequently be used in Monte Carlo simulations (MCSs) to identify candidate model-informed dosing regimens across renal-function and RRT strata.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
33

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • China
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310000
        • The First Affiliated Hospital,College of Medicine,Zhejiang University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population will comprise critically ill adult patients receiving ceftazidime-avibactam (CAZ-AVI) for carbapenem-resistant organism (CRO) infections at the intensive care unit of the First Affiliated Hospital, Zhejiang University School of Medicine.

Description

Inclusion Criteria:

  • Critically ill patients with severe sepsis(CRO infections) and treated with CAZ-AVI(culture-confirmed CRO susceptible to CAZ-AVI);
  • Age ≥ 18 years;
  • Expected ICU stay ≥48 hours.
  • Hemoglobin >70 g/L during the pharmacokinetic blood-sampling period；
  • The patient or authorized persons agree and sign the informed consent.

Exclusion Criteria:

  • Expected ICU stay <48 hours.
  • Pregnant woman.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Plasma drug concentrations of CAZ and AVI after first-dose administration
Time Frame: 0, 1, 2, 4, 6, and 8 hours after the first-dose infusion.
Plasma concentrations of CAZ and AVI will be measured after the first-dose infusion.
0, 1, 2, 4, 6, and 8 hours after the first-dose infusion.
Plasma drug concentrations of CAZ and AVI at steady state
Time Frame: 0, 1, 2, 4, 6, and 8 hours after the steady-state infusion.
Plasma drug concentrations of CAZ and AVI will be measured after the steady-state infusion
0, 1, 2, 4, 6, and 8 hours after the steady-state infusion.
Population pharmacokinetic characterization and PK/PD-based dosing evaluation of CAZ-AVI
Time Frame: After completion of pharmacokinetic data collection
Population pharmacokinetic models of ceftazidime and avibactam will be developed using plasma concentration and clinical data from critically ill patients. Pharmacokinetic/pharmacodynamic analyses will be performed to evaluate dosing regimens across different levels of renal function, including patients receiving renal replacement therapy (RRT).
After completion of pharmacokinetic data collection

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
length of stay
Time Frame: Day 1 is defined as the day of confirmed diagnosis, the duration from confirmed diagnosis to ICU discharge will be measured.
Post-infection ICU length of stay
Day 1 is defined as the day of confirmed diagnosis, the duration from confirmed diagnosis to ICU discharge will be measured.
length of stay
Time Frame: From ICU admission to ICU discharge will be measured(assessed up to 120 days).
Total ICU length of stay.
From ICU admission to ICU discharge will be measured(assessed up to 120 days).
Microbiological clearance
Time Frame: 14 day after the onset of infection
Microbiological clearance assessed based on follow-up microbiological culture results.
14 day after the onset of infection
Infection-related mortality
Time Frame: 14 day after the onset of infection
Infection-related mortality within 14 days after the onset of infection.
14 day after the onset of infection
Treatment outcome
Time Frame: 14 day after the onset of infection
Treatment outcome within 14 days after the onset of infection.
14 day after the onset of infection
all-cause mortality
Time Frame: 30 day after the onset of infection
30 day all-cause mortality
30 day after the onset of infection

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
First Affiliated Hospital of Zhejiang University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: YongHong Xiao, PhD, First affiliated Hospital of Zhejiang University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 8, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 20, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 7, 2022

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 7, 2022

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 10, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 10, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 8, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2022-468

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Respect ethics and protect patient privacy

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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