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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05095857
Other study ID # H-21056972
Secondary ID 2021-003716-12
Status Recruiting
Phase Phase 4
First received
Last updated
Start date September 15, 2023
Est. completion date December 1, 2026

Study information

Verified date September 2023
Source Rigshospitalet, Denmark
Contact Trine H Andreasen, MD
Phone +4535455982
Email trine.hjorslev.andreasen@regionh.dk
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Cortical spreading depolarisations are pathological depolarisation waves that occur frequently after severe acute brain injury and has been associated with poor outcome. S-ketamine has been shown to inhibit cortical spreading depolarisations. The aim of the present study is to examine the efficacy and safety of using S-ketamine for treatment of patients with severe acute brain injury, as well as the feasibility of the trial design.


Description:

Severe acute brain injury caused by traumatic brain injury (TBI), aneurysmal subarachnoid haemorrhage (aSAH) or intracerebral haemorrhage (ICH) carries a high morbidity and mortality. In all these conditions, clinical neurological deterioration may occur as a consequence of so-called secondary brain injury, which reduces the chance of a good outcome. Thus, neurological deterioration after the initial injury is generally associated with a worse outcome. Cortical spreading depolarisations (SDs) are pathological depolarisation waves that occur frequently after both TBI, SAH, and ICH and have been related to poor outcome. The SDs, which can be detected by electrocorticography (ECoG, using electrodes placed directly on the brain cortex), propagate across the cerebral cortex and are followed by an excessive upregulation of cerebral metabolism and decrease in cerebral blood flow. In vulnerable brain tissue such as in patients after acute primary brain injury, this combination of hypermetabolism and hypoperfusion is thought to increase the risk of ischaemia and infarction. The anaesthetic drug ketamine, which is an NMDA-receptor antagonist, appears to inhibit SDs both in vitro and in patient series. The present trial is a randomised, blinded, placebo-controlled, parallel-group pilot and feasibility trial, where participants with clustered SD despite physiological optimisation are allocated 1:1 to infusion of S-ketamine versus matching placebo. In the present trial, participants admitted to the neurointensive care unit with TBI, aSAH or ICH and undergoing craniotomy or craniectomy (for clipping of an aneurysm or removal of a space-occupying haematoma). Patients are monitored at the neurointensive care unit, Rigshospitalet and sedated using standard sedatives. Patients will be monitored both with ECoG, intracranial pressure (ICP), brain tissue oxygen tension (PbtO2), and microdialysis. Patients in whom SDs occur will be subjected to a protocol of physiological optimisation targeting ICP, PbtO2, blood glucose and core temperature following clinical guidelines. If clustered SDs occur despite optimisation, patients are randomly allocated to infusion of either S-ketamine or matching placebo (isotonic saline) at a 1:1 allocation ratio with full blinding of the treatment allocation. The present trial will continue until 160 participants have been randomised. Since only participants with clustered SDs are randomised, the investigators expect to include no more than 400 participants for ECoG monitoring. The present trial aims to examine the efficacy of S-ketamine on SDs, the safety, and the feasibility of the trial design. Furthermore, surviving patients will be followed up until six months after the injury, and functional outcome will be recorded by the modified Rankin Scale (mRS).


Recruitment information / eligibility

Status Recruiting
Enrollment 400
Est. completion date December 1, 2026
Est. primary completion date December 1, 2026
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: - Age = 18 years. - Admitted to the NICU with a diagnosis of TBI, aneurysmal SAH or spontaneous ICH. - Planned for surgery with a craniotomy or craniectomy. - Expected to continue sedation and mechanical ventilation after surgery. Exclusion Criteria: - Patient and next of kin do not read or understand spoken Danish. - Known allergy to S-ketamine (the active pharmaceutical ingredient or the excipients). - Wake-up call to occur immediately after surgery. - Pregnancy (all female participants aged = 50 years will have a blood hCG taken to control for pregnancy). - Active anti-psychotic treatment before admission - Current abuse of ketamine. Since this is an emergency trial informed consent will be obtained from a trial guardian before inclusion of the participant, and informed consent will be sought from next of kin as soon as possible.

Study Design


Intervention

Drug:
S-ketamine
S-ketamines is an NMDA-receptor antagonist with sedative and analgesic properties. It will in the present trial be given in sedative doses (2-3 mg/kg/hour) in case of clustered SDs following a dosing algorithm according to SD occurrence.
Other:
Isotonic saline (placebo)
Isotonic saline has the same appearance as S-ketamine with both being clear liquids with no bubbles or other distinguishing features.

Locations

Country Name City State
Denmark Rigshospitalet Copenhagen

Sponsors (2)

Lead Sponsor Collaborator
Rigshospitalet, Denmark Copenhagen Trial Unit, Center for Clinical Intervention Research

Country where clinical trial is conducted

Denmark, 

References & Publications (26)

Ayata C, Lauritzen M. Spreading Depression, Spreading Depolarizations, and the Cerebral Vasculature. Physiol Rev. 2015 Jul;95(3):953-93. doi: 10.1152/physrev.00027.2014. — View Citation

Budohoski KP, Guilfoyle M, Helmy A, Huuskonen T, Czosnyka M, Kirollos R, Menon DK, Pickard JD, Kirkpatrick PJ. The pathophysiology and treatment of delayed cerebral ischaemia following subarachnoid haemorrhage. J Neurol Neurosurg Psychiatry. 2014 Dec;85(12):1343-53. doi: 10.1136/jnnp-2014-307711. Epub 2014 May 20. — View Citation

Carlson AP, Abbas M, Alunday RL, Qeadan F, Shuttleworth CW. Spreading depolarization in acute brain injury inhibited by ketamine: a prospective, randomized, multiple crossover trial. J Neurosurg. 2018 May 25:1-7. doi: 10.3171/2017.12.JNS171665. Online ahead of print. — View Citation

Chesnut RM, Marshall LF, Klauber MR, Blunt BA, Baldwin N, Eisenberg HM, Jane JA, Marmarou A, Foulkes MA. The role of secondary brain injury in determining outcome from severe head injury. J Trauma. 1993 Feb;34(2):216-22. doi: 10.1097/00005373-199302000-00006. — View Citation

Cordonnier C, Demchuk A, Ziai W, Anderson CS. Intracerebral haemorrhage: current approaches to acute management. Lancet. 2018 Oct 6;392(10154):1257-1268. doi: 10.1016/S0140-6736(18)31878-6. Erratum In: Lancet. 2019 Feb 2;393(10170):406. — View Citation

Dreier JP, Woitzik J, Fabricius M, Bhatia R, Major S, Drenckhahn C, Lehmann TN, Sarrafzadeh A, Willumsen L, Hartings JA, Sakowitz OW, Seemann JH, Thieme A, Lauritzen M, Strong AJ. Delayed ischaemic neurological deficits after subarachnoid haemorrhage are associated with clusters of spreading depolarizations. Brain. 2006 Dec;129(Pt 12):3224-37. doi: 10.1093/brain/awl297. Epub 2006 Oct 25. — View Citation

Gradisek P, Osredkar J, Korsic M, Kremzar B. Multiple indicators model of long-term mortality in traumatic brain injury. Brain Inj. 2012;26(12):1472-81. doi: 10.3109/02699052.2012.694567. Epub 2012 Jun 21. — View Citation

Gross BA, Jankowitz BT, Friedlander RM. Cerebral Intraparenchymal Hemorrhage: A Review. JAMA. 2019 Apr 2;321(13):1295-1303. doi: 10.1001/jama.2019.2413. — View Citation

Gruenbaum SE, Bilotta F. Postoperative ICU management of patients after subarachnoid hemorrhage. Curr Opin Anaesthesiol. 2014 Oct;27(5):489-93. doi: 10.1097/ACO.0000000000000111. — View Citation

Gruenbaum SE, Zlotnik A, Gruenbaum BF, Hersey D, Bilotta F. Pharmacologic Neuroprotection for Functional Outcomes After Traumatic Brain Injury: A Systematic Review of the Clinical Literature. CNS Drugs. 2016 Sep;30(9):791-806. doi: 10.1007/s40263-016-0355-2. — View Citation

Hartings JA, Andaluz N, Bullock MR, Hinzman JM, Mathern B, Pahl C, Puccio A, Shutter LA, Strong AJ, Vagal A, Wilson JA, Dreier JP, Ngwenya LB, Foreman B, Pahren L, Lingsma H, Okonkwo DO. Prognostic Value of Spreading Depolarizations in Patients With Severe Traumatic Brain Injury. JAMA Neurol. 2020 Apr 1;77(4):489-499. doi: 10.1001/jamaneurol.2019.4476. — View Citation

Helbok R, Schiefecker AJ, Friberg C, Beer R, Kofler M, Rhomberg P, Unterberger I, Gizewski E, Hauerberg J, Moller K, Lackner P, Broessner G, Pfausler B, Ortler M, Thome C, Schmutzhard E, Fabricius M. Spreading depolarizations in patients with spontaneous intracerebral hemorrhage: Association with perihematomal edema progression. J Cereb Blood Flow Metab. 2017 May;37(5):1871-1882. doi: 10.1177/0271678X16651269. Epub 2016 Jan 1. — View Citation

Hertle DN, Dreier JP, Woitzik J, Hartings JA, Bullock R, Okonkwo DO, Shutter LA, Vidgeon S, Strong AJ, Kowoll C, Dohmen C, Diedler J, Veltkamp R, Bruckner T, Unterberg AW, Sakowitz OW; Cooperative Study of Brain Injury Depolarizations (COSBID). Effect of analgesics and sedatives on the occurrence of spreading depolarizations accompanying acute brain injury. Brain. 2012 Aug;135(Pt 8):2390-8. doi: 10.1093/brain/aws152. Epub 2012 Jun 19. — View Citation

Hertle DN, Heer M, Santos E, Scholl M, Kowoll CM, Dohmen C, Diedler J, Veltkamp R, Graf R, Unterberg AW, Sakowitz OW. Changes in electrocorticographic beta frequency components precede spreading depolarization in patients with acute brain injury. Clin Neurophysiol. 2016 Jul;127(7):2661-7. doi: 10.1016/j.clinph.2016.04.026. Epub 2016 May 4. — View Citation

Lauritzen M, Dreier JP, Fabricius M, Hartings JA, Graf R, Strong AJ. Clinical relevance of cortical spreading depression in neurological disorders: migraine, malignant stroke, subarachnoid and intracranial hemorrhage, and traumatic brain injury. J Cereb Blood Flow Metab. 2011 Jan;31(1):17-35. doi: 10.1038/jcbfm.2010.191. Epub 2010 Nov 3. — View Citation

Macdonald RL, Schweizer TA. Spontaneous subarachnoid haemorrhage. Lancet. 2017 Feb 11;389(10069):655-666. doi: 10.1016/S0140-6736(16)30668-7. Epub 2016 Sep 13. — View Citation

Nieuwkamp DJ, Setz LE, Algra A, Linn FH, de Rooij NK, Rinkel GJ. Changes in case fatality of aneurysmal subarachnoid haemorrhage over time, according to age, sex, and region: a meta-analysis. Lancet Neurol. 2009 Jul;8(7):635-42. doi: 10.1016/S1474-4422(09)70126-7. Epub 2009 Jun 6. — View Citation

Olsen MH, Orre M, Leisner ACW, Rasmussen R, Bache S, Welling KL, Eskesen V, Moller K. Delayed cerebral ischaemia in patients with aneurysmal subarachnoid haemorrhage: Functional outcome and long-term mortality. Acta Anaesthesiol Scand. 2019 Oct;63(9):1191-1199. doi: 10.1111/aas.13412. Epub 2019 Jun 7. — View Citation

Reinhart KM, Shuttleworth CW. Ketamine reduces deleterious consequences of spreading depolarizations. Exp Neurol. 2018 Jul;305:121-128. doi: 10.1016/j.expneurol.2018.04.007. Epub 2018 Apr 10. — View Citation

Sakowitz OW, Kiening KL, Krajewski KL, Sarrafzadeh AS, Fabricius M, Strong AJ, Unterberg AW, Dreier JP. Preliminary evidence that ketamine inhibits spreading depolarizations in acute human brain injury. Stroke. 2009 Aug;40(8):e519-22. doi: 10.1161/STROKEAHA.109.549303. Epub 2009 Jun 11. — View Citation

Schiefecker AJ, Beer R, Pfausler B, Lackner P, Broessner G, Unterberger I, Sohm F, Mulino M, Thome C, Humpel C, Schmutzhard E, Helbok R. Clusters of cortical spreading depolarizations in a patient with intracerebral hemorrhage: a multimodal neuromonitoring study. Neurocrit Care. 2015 Apr;22(2):293-8. doi: 10.1007/s12028-014-0050-4. — View Citation

Seder DB, Mayer SA. Critical care management of subarachnoid hemorrhage and ischemic stroke. Clin Chest Med. 2009 Mar;30(1):103-22, viii-ix. doi: 10.1016/j.ccm.2008.11.004. — View Citation

Shah S, Kimberly WT. Today's Approach to Treating Brain Swelling in the Neuro Intensive Care Unit. Semin Neurol. 2016 Dec;36(6):502-507. doi: 10.1055/s-0036-1592109. Epub 2016 Dec 1. — View Citation

Sheriff FG, Hinson HE. Pathophysiology and clinical management of moderate and severe traumatic brain injury in the ICU. Semin Neurol. 2015 Feb;35(1):42-9. doi: 10.1055/s-0035-1544238. Epub 2015 Feb 25. — View Citation

Welling L, Welling MS, Teixeira MJ, Figueiredo EG. Cortical spread depolarization and ketamine: a revival of an old drug or a new era of neuroprotective drugs? World Neurosurg. 2015 Apr;83(4):396-7. doi: 10.1016/j.wneu.2015.01.006. Epub 2015 Jan 31. No abstract available. — View Citation

Zhou YT, Tong DM, Wang SD, Ye S, Xu BW, Yang CX. Acute spontaneous intracerebral hemorrhage and traumatic brain injury are the most common causes of critical illness in the ICU and have high early mortality. BMC Neurol. 2018 Aug 27;18(1):127. doi: 10.1186/s12883-018-1127-z. — View Citation

* Note: There are 26 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Other All-cause mortality assessed at 6 months after randomisation
Other Number of participants with signs of ischaemia or infarction on computed tomography (CT) or magnetic resonance imaging (MRI). Last scan performed on clinical indication before discharge from NICU or semi-intensive care unit Before discharge from NICU or the semi-intentisive care unit, expected up to be no later than day 21 postrandomisation
Other Occurrence of metabolic crisis (defined as microdialysis (MD)-lactate/pyruvate ratio >40, MD-glucose < 0.8 µmol/L) Postrandomisation period, expected up to 21 days
Other Occurrence of local cerebral hypoxia (PbtO2 <20 mmHg for more than 20 minutes) Postrandomisation period, expected up to 21 days
Other Dosage of standard sedatives and analgesics Postrandomisation period, expected up to 21 days
Other Number of imaging procedures (CT of the brain, CT-angiography, digital subtraction angiography, MRI) Postrandomisation period, expected up to 21 days
Other Number of episodes of neurological worsening Postrandomisation period, expected up to 21 days
Other Occurrence of delayed cerebral ischemia (DCI) in participants with aSAH Postrandomisation period, expected up to 21 days
Other Fraction of participants included in the trial out of all eligible participants Feasibility outcome Assessed after 2 years or when one-third of the 160 participants have been randomised
Other Fraction of participants who are randomised of all included Feasibility outcome Assessed after 2 years or when one-third of the 160 participants have been randomised
Primary Occurrence of SDs after randomisation Efficacy of S-ketamine on the occurrence of cortical spreading depolarisations From randomisation to end of ECoG monitoring, expected to be a maximum of 14 days
Secondary Rate of adverse events and adverse reactions During treatment with S-ketamine or placebo, a maximum of 14 days
Secondary Functional outcome at 6 months after randomisation assessed using modified Rankin Scale 6 months after randomisation
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