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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01595386
Other study ID # Postop Steroids after CPB
Secondary ID
Status Completed
Phase N/A
First received March 16, 2012
Last updated October 12, 2015
Start date April 2012
Est. completion date November 2013

Study information

Verified date October 2015
Source University of Alabama at Birmingham
Contact n/a
Is FDA regulated No
Health authority United States: Institutional Review Board
Study type Interventional

Clinical Trial Summary

This protocol is designed to offer insight into critical illness related corticosteroid insufficiency and steroid supplementation in neonates undergoing cardiac surgery with cardiopulmonary bypass by administering exogenous steroids in the immediate post-operative period.


Description:

Open-heart surgery with cardiopulmonary bypass (CPB) induces an acute systemic inflammatory response (SIRS) via synthesis and release of inflammatory mediators. These inflammatory cascades may result in the development of capillary leak and generalized tissue edema, which are associated with multiorgan dysfunction involving the myocardium, lungs, kidneys, pancreas, and central nervous system. Neonates are especially susceptible to the injurious effects of SIRS. In attempt to blunt post-bypass SIRS, most neonatal heart programs have protocols in which patients receive preoperative and/or intraoperative steroids. Despite this widespread use, studies have not demonstrated consistent benefit in this therapy, and neonates often continue to suffer the deleterious effects of SIRS postoperatively. Only one study was designed to evaluate the impact of prophylactic postoperative steroid administration on outcomes after neonatal CPB. The early postoperative periods is a crucial time during which attenuation of CPB-induced SIRS by exogenous steroids may lead to improved clinical outcomes.

Adrenal insufficiency in neonates post-CPB may accentuate the harmful effects of SIRS by diminishing the anti-inflammatory and hemodynamic stabilization benefits of endogenous cortisol. Evidence suggests that neonates may suffer from inadequate cortisol activity relative to the severity of illness post-CPB, in part related to immaturity of their hypothalamic-pituitary-adrenal (HPA) axis. This so-called critical illness-related corticosteroids insufficiency (CIRCI) may contribute to low cardiac output syndrome (LCOS), respiratory dysfunction, and capillary leak in the postoperative period.

Much of the support for CIRCI as a contributor to LCOS after CPB originates from small clinical studies that demonstrate benefit of exogenous steroid supplementation on various short term clinical outcomes in patients with shock. Yet it is not clear if benefit from exogenous steroids suggests by dysregulation of the HPA axis or whether these are merely alternative effects of steroids. Investigators have recently begun to describe the cortisol response in neonates post-CPB, but there is no consensus regarding the incidence of clinically important adrenal insufficiency, its identification, or who should receive exogenous steroids.


Recruitment information / eligibility

Status Completed
Enrollment 40
Est. completion date November 2013
Est. primary completion date November 2013
Accepts healthy volunteers No
Gender Both
Age group N/A to 28 Days
Eligibility Inclusion Criteria:

1. Neonate (< 28 days old) undergoing correct cardiac surgery, or infants undergoing the following surgery procedures: Norwood, Arterial Switch, Total Anomalous Pulmonary Venous Return Repair, Interrupted Aortic Arch Repair, Truncus Arteriosus Repair

2. Successfully weaned off cardiopulmonary bypass after cardiac surgery

Exclusion Criteria:

1. requirement for extracorporeal membrane oxygenation (ECMO) in the operating room

2. Known immune deficiency

3. Having previously received systemic steroids (except for two routine preoperative doses)

4. A current signed Do not resuscitate (DNR) or limitation of care order

5. Current enrollment in another interventional clinical study

6. Refusal of parental consent

7. Previous diagnosis of adrenal insufficiency

8. > 28 days old at time of surgery whose repair dose not require CPB

Study Design

Allocation: Randomized, Endpoint Classification: Safety Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Treatment


Intervention

Drug:
Hydrocortisone
The drug will be bolused at 50mg/m2 followed by a continuous infusion that will start at 50mg/m2 for the first 48 hours and then be tapered as follows: 40mg/m2/day over 24 hours, 30mg/m2/day over 12 hours, 20 mg/m2/day over 12 hours, 10mg/m2/day over 24 hours, then off.
Normal Saline
This will be bolused and infused in the same manner as the hydrocortisone arm to ensure blinding of study arm.

Locations

Country Name City State
United States University of Alabama at Birmingham Birmingham Alabama

Sponsors (1)

Lead Sponsor Collaborator
University of Alabama at Birmingham

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Incidence of Low Cardiac Output Syndrome (LCOS) Low Cardiac Output Syndrome (LCOS) within the first 48 hours after post-operative admission to the Pediatric Cardiac Intensive Care Unit was used as the primary outcome. This was defined as a double in inotropic support from post-operative admit, requiring Extracorporeal Membrane Oxygenation (ECMO) support, receiving Cardiopulmonary Resuscitation, or death. first 48 hours after cardiac intensive care unit (CICU) admission post-op No
Secondary Mean Number of Days Subjects Alive and Ventilator Free Respiratory variables include such as alive, ventilator free days at 28 days post-op will be used as secondary outcome. The mean number of days subjects were live and ventilator free up to the 28 days after surgery. up to 28 days post op No
Secondary Hospital Length of Stay The average length of hospital stay from the time the subject is admitted to the CICU post-op until they are discharged will be used as a secondary outcome. Admit to CICU till hospital discharge, approximately 3 weeks No
Secondary Changes in Baseline Inflammatory Mediators Changes in pre-op inflammatory mediators will be assessed at 0, 4, 12, 24 and 48 hours post bypass and used as a secondary outcome. 0, 4,12, 24, and 48 hours post bypass No
Secondary Average Inotrope Score Average inotrope score over first 48 hours after Cardiac Intensive Care Unit admission was used as a secondary outcome. Inotrope Score is calculated based on the dose of inotropes currently infusing at a given time points. The formula for calculation is as follows: Epinephrine/Norepinephrine (mcg/kg/min) dose x100, plus Dopamine/Dobutamine (mcg/kg/min) dose x 1, plus Neosynephrine (mcg/kg/min) dose x10, plus Vasopressin (units/kg/hr) [(dose x60)/10,000] = Inotrope Score. Our institution does not include Milrinone in our inotrope score calculation because every patient receives a continuous infusion in the immediate post-operative period. The higher the inotrope score the more cardiac support the patient is requiring or the worse their cardiac function is becoming. first 48 hours post-op No
Secondary Fluid Balance Hemodynamic variable such as total fluid balance within the first 48 hours post-op will be used as a secondary outcome. Fluid balance is a calculation of the overall fluid status for a given time period. The total input (fluid, medications, etc) that are given to a patient during a given time frame (24 hours) minus the total output (urine, stool, drainage, etc. ) that comes out of a patient during a given time frame. 1st 48 hours post-op No
Secondary Changes in Baseline Arterial-venous Oxygen Saturation Difference Respiratory values such as changes in baseline arterial-venous oxygen saturation difference at admission to the pediatric cardiac intensive care unit will be used as a secondary outcome. admit to the CICU No
Secondary Time Until First Extubation Respiratory values such as duration of intubation will be used as a secondary outcome. Until discharge from hospital, approximately 2 weeks No
Secondary CICU Length of Stay CICU length of stay will be calculated from the time the subject is admitted to the CICU post-op until they are discharged from the unit. This will be used as a secondary outcome. approximately 1 week No
Secondary Mortality Subject mortality will in the CICU will be used as a secondary outcome. Duration of CICU stay, approximately 1 week No
Secondary ACTH Stimulation Test AdrenoCorticoTropic Hormone stimulation test will be performed at least 24 hours pre-bypass and immediately after successful discontinuation of bypass and compared. These outcomes will be used as a secondary outcome. 24 hours prebypass and 0 hours post-bypass No