Evaluating Monitoring Techniques for Postoperative Spinal Cord Ischemia

Postoperative Clinical Trial

— SINATRA  

Official title:

Exploratory Study Regarding the Use of Neurophysiological Monitoring Techniques to Detect Spinal Cord Ischemia in Patients After Thoracoabdominal Aortic Aneurysm Repair

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT03074487
• Other study ID #: NL58137.068.16
• Status: Recruiting
• Start date: January 2017
• Est. completion date: December 2024

Study information

• Verified date: October 2023
• Source: Maastricht University Medical Center
• Contact: Nadia A Sutedja, Dr
• Phone: +31 (0)43 387 4519,
• Email: nadia.sutedja[@]mumc.nl
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

During open surgery of a thoraco-abdominal aortic aneurysma (TAAA), diminished blood flow to the myelum can result in hypoxia, compromising proper function of the spinal cord.

Intraoperatively, motor evoked potentials (MEP) are elicited to measure the functional integrity of the spinal cord. MEPs have proven to be a reliable marker of spinal cord ischemia. Moreover, these potentials react within minutes, which facilitates interventions to restore the blood flow. Monitoring intraoperatively with this ancillary test has reduced the rate of paraparesis to < 5%. Unfortunately, in the early postoperative period, spinal cord vulnerability is high. Therefore, some patients develop paraparesis, not during the surgical procedure, but after the surgical procedure. Postoperatively, suboptimal blood flow may lead to critical loss of function. This inadequate perfusion results in "delayed paraparesis". In the postoperative patient, it is not possible to measure MEPs when sedation is decreased, due to the high intensity of the electrical stimulus, which is unacceptably painful in the unanesthetized or partially anesthetized patient. Therefore ancillary tests are needed which can detect spinal cord ischemia postoperatively early, thus preceding the phase with clinically overt paraparesis. The test should be reliable and easy to perform for an extended period of time (up to several days).

The purpose of this study is to explore the usefulness of various neurophysiological tests regarding accuracy and feasibility for the detection of spinal cord ischemia. In particular, to find a diagnostic test which is acceptable for the unanesthetized or partially anesthetized patient and therefore can also be performed postoperatively. These tests will be examined in fully sedated as well as partially sedated patients.

The following candidate tests will be examined:

1. Long loop reflexes (LLR) consisting of F-waves.

2. Oxygenation measurements of the paraspinal muscles using Near-infrared spectroscopy (NIRS).

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 100
• Est. completion date: December 2024
• Est. primary completion date: December 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Thoraco-abdominal aneurysm (TAA) of the descending aorta: Crawford type I,II, III, IV or V

• Repair using open surgical or endovascular procedure.

• Undergoing monitoring by motor evoked potentials (MEP) as part of the standard surgical procedure.

Exclusion Criteria:

• Aneurysm only in ascending part of the aorta

• Standard contraindications for motor evoked potential (MEP) monitoring.

• Standard contraindications for electrode placement (skin wounds, etc.)

• No informed consent can be obtained prior to the procedure

Related Conditions & MeSH terms

• Aneurysm
• F-waves
• Ischemia
• Long Loop Reflexes
• Monitoring
• NIRS
• Postoperative
• Spinal Cord Ischemia
• TAAA
• Thoracoabdominal Aneurysm

Intervention

Device:
• Near-infrared spectroscopy

• Long loop reflex measurements

Locations

Country	Name	City	State
Netherlands	MaastrichtUMC	Maastricht	Limburg

Sponsors (1)

Lead Sponsor	Collaborator
Maastricht University Medical Center

Country where clinical trial is conducted

Netherlands, 

References & Publications (8)

Armstrong KL, Wood D. Can infant death from child abuse be prevented? Med J Aust. 1992 Feb 17;156(4):290. doi: 10.5694/j.1326-5377.1992.tb139757.x. No abstract available. — View Citation

Boezeman RP, van Dongen EP, Morshuis WJ, Sonker U, Boezeman EH, Waanders FG, de Vries JP. Spinal near-infrared spectroscopy measurements during and after thoracoabdominal aortic aneurysm repair: a pilot study. Ann Thorac Surg. 2015 Apr;99(4):1267-74. doi: 10.1016/j.athoracsur.2014.10.032. Epub 2015 Jan 14. — View Citation

Etz CD, Di Luozzo G, Zoli S, Lazala R, Plestis KA, Bodian CA, Griepp RB. Direct spinal cord perfusion pressure monitoring in extensive distal aortic aneurysm repair. Ann Thorac Surg. 2009 Jun;87(6):1764-73; discussion 1773-4. doi: 10.1016/j.athoracsur.2009.02.101. — View Citation

Etz CD, von Aspern K, Gudehus S, Luehr M, Girrbach FF, Ender J, Borger M, Mohr FW. Near-infrared spectroscopy monitoring of the collateral network prior to, during, and after thoracoabdominal aortic repair: a pilot study. Eur J Vasc Endovasc Surg. 2013 Dec;46(6):651-6. doi: 10.1016/j.ejvs.2013.08.018. Epub 2013 Sep 5. — View Citation

Greiner A, Mess WH, Schmidli J, Debus ES, Grommes J, Dick F, Jacobs MJ. Cyber medicine enables remote neuromonitoring during aortic surgery. J Vasc Surg. 2012 May;55(5):1227-32; discussion 1232-3. doi: 10.1016/j.jvs.2011.11.121. Epub 2012 Feb 15. — View Citation

Jacobs MJ, Mess W, Mochtar B, Nijenhuis RJ, Statius van Eps RG, Schurink GW. The value of motor evoked potentials in reducing paraplegia during thoracoabdominal aneurysm repair. J Vasc Surg. 2006 Feb;43(2):239-46. doi: 10.1016/j.jvs.2005.09.042. — View Citation

Jacobs MJ, Mess WH. The role of evoked potential monitoring in operative management of type I and type II thoracoabdominal aortic aneurysms. Semin Thorac Cardiovasc Surg. 2003 Oct;15(4):353-64. doi: 10.1053/s1043-0679(03)00084-4. — View Citation

Moerman A, Van Herzeele I, Vanpeteghem C, Vermassen F, Francois K, Wouters P. Near-infrared spectroscopy for monitoring spinal cord ischemia during hybrid thoracoabdominal aortic aneurysm repair. J Endovasc Ther. 2011 Feb;18(1):91-5. doi: 10.1583/10-3224.1. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	changes in MEP signals perioperative	These signals will be recoded into categorical variables. To determine associations logistic regression analysis will be performed (univariate and multivariate adjusting for confounders). Screening test calculations (sensitivity, specificity, positive and negative predictive values, false-positive and false-negative rates) will be performed using standard contingency table methods. Agreement between the methods (vs MEP) will be estimated using the Cohen k statistic. The results will first be evaluated descriptively to fine-tune the cut-off values in de the definitive protocol.	8 hours
Primary	Presence of LLR (F-waves) perioperative	These signals will be recoded into categorical variables. To determine associations logistic regression analysis will be performed (univariate and multivariate adjusting for confounders). Screening test calculations (sensitivity, specificity, positive and negative predictive values, false-positive and false-negative rates) will be performed using standard contingency table methods. Agreement between the methods (vs MEP) will be estimated using the Cohen k statistic. The results will first be evaluated descriptively to fine-tune the cut-off values in de the definitive protocol.	8 hours
Primary	Oxygenation of the paraspinal muscle tissue measured by NIRS perioperative	These signals will be recoded into categorical variables. To determine associations logistic regression analysis will be performed (univariate and multivariate adjusting for confounders). Screening test calculations (sensitivity, specificity, positive and negative predictive values, false-positive and false-negative rates) will be performed using standard contingency table methods. Agreement between the methods (vs MEP) will be estimated using the Cohen k statistic. The results will first be evaluated descriptively to fine-tune the cut-off values in de the definitive protocol.	8 hours
Secondary	The occurrence of intra- and postoperative changes in LLR (F-waves)	These signals will be recoded into categorical variables. To determine associations logistic regression analysis will be performed (univariate and multivariate adjusting for confounders). Screening test calculations (sensitivity, specificity, positive and negative predictive values, false-positive and false-negative rates) will be performed using standard contingency table methods. The results will first be evaluated descriptively to fine-tune the cut-off values in de the definitive protocol.	24 hours
Secondary	The occurrence intra- and postoperative changesNIRS of the paraspinal muscle tissue	These signals will be recoded into categorical variables. To determine associations logistic regression analysis will be performed (univariate and multivariate adjusting for confounders). Screening test calculations (sensitivity, specificity, positive and negative predictive values, false-positive and false-negative rates) will be performed using standard contingency table methods. The results will first be evaluated descriptively to fine-tune the cut-off values in de the definitive protocol.	24 hours