- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05079269
Pre-op Fluid Study
Effect of Pre-operative Intravenous Crystalloids on Post-Induction Blood Pressure
Theoretical framework:
Hypotension during surgery directly impacts patients' postoperative outcomes and complications. Decrease in blood pressure measurements secondary to anesthetic drugs is an expected scenario in most surgical cases. Moreover, hypovolemia secondary to fast pre-operative period may facilitate post-induction hypotension which can be compensated by fluid bolus pre-operatively.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Objectives:
The purpose of the study is to conduct a randomized intervention cohort study using pre-operative fluid therapy to assess its effect on blood pressure during the post-induction period. The investigators are testing the hypothesis that preoperative Crystalloid bolus decreases the risk of post-induction hypotension, specifically the time-weighted average (TWA) mean arterial pressure (MAP) under 65 mmHg during the first 20 minutes after anaesthetic induction or until surgical incision, whichever is first, compared to standard of care, which is minimal fluid administration in the pre-operative period.
Methods:
The investigators will conduct a randomized intervention cohort study using pre-operative fluid therapy to assess its effect on blood pressure during the post-induction period. The intervention group will receive a balanced crystalloid solution bolus within 20 to 40 minutes before induction of anaesthesia. The control group will be treated according to the current clinical standard of care. The investigators will compare the time-weighted average (TWA) mean arterial pressure (MAP) under 65 mmHg during the first 20 minutes after anaesthetic induction or until surgical incision (whichever comes first).
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Michael Eichinger, MD, MSc
- Phone Number: 00436644197727
- Email: michael.eichinger@medunigraz.at
Study Contact Backup
- Name: Michael Eichinger, MD, MSc
- Phone Number: 004331638580515
Study Locations
-
-
-
Vienna, Austria
- Recruiting
- Medical University Vienna
-
Contact:
- Christian Reiterer, Dr
- Email: christian.reiterer@meduniwien.ac.at
-
-
Styria
-
Graz, Styria, Austria, 8036
- Recruiting
- Medical University Graz
-
Contact:
- Michael Eichinger, MD, MSc
- Phone Number: 004331638580515
- Email: michael.eichinger@medunigraz.at
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Scheduled for major non-cardiac surgery
- Having general anaesthesia
- Are designated ASA physical status ≥2 (ranging from mild systemic disease through severe systemic disease that is a constant threat to life)
Subject to at least one of the following risk factors:
- Age ≥ 65 years
- History of peripheral arterial surgery
- History of coronary artery disease
- History of stroke or transient ischemic attack
- Serum creatinine >175 µmol/L (>2.0 mg/dl)
- Diabetes requiring medication
- Current smoking or 15 pack-year history of smoking tobacco
- Preoperative high-sensitivity troponin T >14 ng/L or troponin I equivalent, defined as ≥15 ng/L (Abbott assay),75 19 ng/L (Siemens assay, [Borges, unpublished]), or 25% of the 99% percentile for other assays;
- B-type natriuretic protein (BNP) ≥ 80 ng/L or N-terminal B-type natriuretic protein (NT-ProBNP) ≥ 200 ng/L.76,77
- History of atrial fibrillation
- Chronically taking at least one anti-hypertensive medication
Exclusion Criteria:
- Are scheduled for carotid artery surgery
- Are scheduled for intracranial surgery
- Are scheduled for pheochromocytoma surgery
- Require preoperative intravenous vasoactive medications
- Active decompensated congestive heart failure (documented EF < 30%)
- Chronic Kidney Disease (eGFR< 30 mL/min)
- History of organ transplantation
- Rectal surgical procedures
- Patients receiving preoperative bowel preparation
- Severe pulmonary edema
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Intervention
The investigators will start a balanced crystalloid solution (in detail we will administer 500ml if the actual body weight is ≤80 kg: the investigators will administer 1000 ml if the actual body weight is >80 kg:) within 20 to 40 minutes before induction of anesthesia in the pre-operative area or at the ward, as appropriate.
|
As above
|
No Intervention: Control
Patients will receive the balanced crystalloid solution according to the current clinical standard of care.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Post-induction MAP
Time Frame: 20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
|
Post-induction hypotension is defined as TWA MAP under 65 mmHg during post-induction period. We will use non-invasive continuous arterial blood pressure monitoring. Anesthesia staff and nurses will be blinded, and standard of care will be provided. Data from the monitor will be recorded in the anesthesia record. We will be using standard intraoperative patient monitoring system. This system will measure 3 lead ECG (electrocardiogram), SpO2 (Arterial oxygen saturation), and number of respirations continuously. The primary outcome will be the TWA MAP under 65 mmHg during the post-induction period. |
20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Vasopressors
Time Frame: 20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
|
The major outcome for the vasopressor requirement will be a binary variable representing the use of vasopressors during the post-induction period.
|
20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
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Cardiac Output (CO)
Time Frame: 20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
|
The major outcome for the non-invasively measured CO will be a continuous measurement throughout pre-induction, induction of anesthesia and post-induction.
|
20 to 40 minutes before induction of anesthesia until the first 20 minutes after anesthetic induction or until surgical incision (whichever comes first)
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Andrea Kurz, Prof, Medical University of Graz, Austria
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 20 (Sophies Minde Ortopedi AS)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
For electronic data management we will use the CLINCASE software (Quadratek, Berlin, Germany). Data storage and back up will be provided by IT Systems & Communications (ITSC) - IT4Science (Medical University of Vienna). Access to data is strictly controlled and will only be provided to the Sponsor (Medical University of Graz and the Medical University of Vienna), the study investigators and the ethic commission (Ethic commission of the Medical University of Vienna).
All entries and changes in the CLINCASE software will be tracked.
IPD Sharing Time Frame
IPD Sharing Access Criteria
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
- CSR
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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