Renal Resistive Index in Patients With Shock

Septic Shock Clinical Trial

Official title:

Relation Between the Renal Resistive Index and Markers of the Systemic Circulation, the Microcirculation, Fluid Status and of Renal Function.

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02558166
• Other study ID #: METC-2015.025
• Status: Completed
• Phase: N/A
• First received: September 22, 2015
• Last updated: May 9, 2016
• Start date: August 2015
• Est. completion date: February 2016

Study information

• Verified date: May 2016
• Source: VU University Medical Center
• Contact: n/a
• Is FDA regulated: No
• Health authority: Netherlands: The Central Committee on Research Involving Human Subjects (CCMO)
• Study type: Observational

Clinical Trial Summary

This study consists of two substudies.

The first substudy:

'Renal resistive index in critically ill patients with cardiogenic and septic shock'

Design: cross-sectional observational

Aim of this project is:

1. to determine whether critically ill patients with cardiogenic and septic shock have an elevated Renal Resistive Index and

2. to determine whether Renal Resistive Index differs between cardiogenic/hypovolemic shock and shock due to sepsis/systemic inflammation (SIRS)

3. to determine the relation between the (change in) renal vascular resistance and

• Markers of the systemic - and the microcirculation

• Fluid status as quantified by bioimpedance analysis

• Concomitant renal function

The second substudy:

'Predictive value of the Renal Resistive Index on ICU admission and its course for the development of acute kidney injury in critically ill patients with cardiogenic and septic shock'

Design: longitudinal observational

The aim of this project is:

1. to determine whether the renal resistance index on admission to the intensive care unit can predict the development of acute kidney injury (AKI) in critically ill patients with shock

2. to investigate if the renal resistance index on admission to the intensive care unit is an independent predictor of the development of AKI or depends on the severity and duration of shock and other known risk factors of AKI such as comorbidity and use of nephrotoxic drugs

Aim of the large research project is to determine whether the Renal Resistive Index could become a monitoring tool for intervention studies aiming to prevent acute kidney injury or protect the kidney.

Description:

Acute Kidney Injury (AKI) is a severe complication developing in intensive care patients as a result of hypovolemic, cardiogenic or septic shock. It is defined by an abrupt decrease in kidney function. It encompasses both direct injury to the kidney as well as acute impairment of function, including decreased glomerular filtration rate (GFR). Its prevention is crucial because AKI increases morbidity and mortality (1). Mechanisms comprise ischemia/reperfusion, oxidative stress, inflammation and toxicity (2).The common pathophysiological pathway includes endothelial damage to microvessels leading to impaired macro- and microvascular flow and this will aggravate ischemia (3).

Up to now, much controversy exists about

• the changes in renal blood flow during different kinds of shock

• the relation between renal blood flow, glomerular filtration rate and the development of AKI

• the relation between renal blood flow and markers of the systemic and microcirculation

In this prospective observational study, three study measurement will be performed in two groups of critically ill patients (shock and no shock).

1. The Renal Resistive Index (RRI) will be determined using Renal Doppler Ultrasound . The renal resistive index (RRI) is a sonographic index assessing resistance of the intrarenal arcuate or interlobar arteries and is used to assess renal arterial disease. It is measured as RRI = (peak systolic velocity - end diastolic velocity)/peak systolic velocity. The normal value is ≈ 0,60, with 0,70 being around the upper limits of normal.

2. The sublingual microcirculation will be quantified using side stream dark field imaging (SDF)

3. Fluid status will be determined by Bioelectrical impedance analysis (BIA) using the Akern device.

In addition, routinely measured markers of circulation, renal function and fluid balance will be collected for analysis.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 92
• Est. completion date: February 2016
• Est. primary completion date: January 2016
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

First group (patients with shock):

• Critically ill patients admitted to the intensive care unit (ICU) with cardiogenic shock or shock due to sepsis/SIRS or hemorrhage

• Age > 18 years

• Noradrenalin support

• ICU admission < 24 hours

• Signed informed consent

Second group (patients without shock):

• Critically ill patients admitted to the intensive care unit (ICU) without shock, without vasopressor support and without fluid-dependent circulation

• Age > 18 years

• ICU admission < 24-h

• Signed informed consent

In both groups, written consent will be obtained if and when the patients are awake and able to communicate ('deferred consent')

Exclusion Criteria:

• Severe pre-admission chronic renal insufficiency (eGFR < 30 ml/min)

• Dialysis dependency

• Renal transplantation

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

• Acute Kidney Injury
• Cardiogenic Shock
• Hypovolemic Shock
• Kidney Failure, Acute
• Renal Insufficiency
• Septic Shock
• Shock
• Shock, Cardiogenic

Locations

Country	Name	City	State
Netherlands	VU Medical Center	Amsterdam	Noord-Holland

Sponsors (1)

Lead Sponsor	Collaborator
VU University Medical Center

Country where clinical trial is conducted

Netherlands, 

References & Publications (7)

Basile DP, Anderson MD, Sutton TA. Pathophysiology of acute kidney injury. Compr Physiol. 2012 Apr;2(2):1303-53. doi: 10.1002/cphy.c110041. Review. — View Citation

Darmon M, Schortgen F, Vargas F, Liazydi A, Schlemmer B, Brun-Buisson C, Brochard L. Diagnostic accuracy of Doppler renal resistive index for reversibility of acute kidney injury in critically ill patients. Intensive Care Med. 2011 Jan;37(1):68-76. doi: 10.1007/s00134-010-2050-y. Epub 2010 Sep 23. — View Citation

De Backer D, Orbegozo Cortes D, Donadello K, Vincent JL. Pathophysiology of microcirculatory dysfunction and the pathogenesis of septic shock. Virulence. 2014 Jan 1;5(1):73-9. doi: 10.4161/viru.26482. Epub 2013 Sep 25. Review. — View Citation

Dewitte A, Coquin J, Meyssignac B, Joannès-Boyau O, Fleureau C, Roze H, Ripoche J, Janvier G, Combe C, Ouattara A. Doppler resistive index to reflect regulation of renal vascular tone during sepsis and acute kidney injury. Crit Care. 2012 Sep 12;16(5):R165. doi: 10.1186/cc11517. — View Citation

Gomez H, Ince C, De Backer D, Pickkers P, Payen D, Hotchkiss J, Kellum JA. A unified theory of sepsis-induced acute kidney injury: inflammation, microcirculatory dysfunction, bioenergetics, and the tubular cell adaptation to injury. Shock. 2014 Jan;41(1):3-11. doi: 10.1097/SHK.0000000000000052. Review. — View Citation

Hoste EA, Schurgers M. Epidemiology of acute kidney injury: how big is the problem? Crit Care Med. 2008 Apr;36(4 Suppl):S146-51. doi: 10.1097/CCM.0b013e318168c590. Review. — View Citation

Schnell D, Deruddre S, Harrois A, Pottecher J, Cosson C, Adoui N, Benhamou D, Vicaut E, Azoulay E, Duranteau J. Renal resistive index better predicts the occurrence of acute kidney injury than cystatin C. Shock. 2012 Dec;38(6):592-7. doi: 10.1097/SHK.0b013e318271a39c. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	renal resistive index (RRI)		1 week	No
Secondary	Creatine clearance (marker of GFR)		1 week	No