- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT07665606
JUgular Gating for Upright Level Adjustment and Targeted Enhancement of Cerebral Perfusion (JUGULATE)
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Detaillierte Beschreibung
Cerebral venous drainage is a major determinant of intracranial pressure (ICP), yet the relationship between trunk inclination and ICP remains incompletely understood. Physiological data in healthy subject suggest that venous outflow may behave nonlinearly, with a threshold angle beyond which further elevation only modestly improves drainage while taking the risk of increasingly compromising cerebral perfusion pressure (CPP). The internal jugular vein (IJV) is the primary conduit for upright cerebral venous return; its collapse was estimated in healthy subjects to occurs when jugular hydrostatic pressure exceeds central venous pressure. Understanding the precise angle at which IJV collapse occurs may allow safer patient positioning strategies in critical care. Doppler ultrasonography, ICP measurements and cerebral perfusion pressure provide complementary data on this physiological breakpoint. Accurate characterization of this nonlinearity may improve cerebral perfusion management and reduce secondary brain injury.
After the routine nursing care, during patient repositioning to 30 ° assessments are performed at 0, 10° 20° 30°, and at a calculated threshold angle α. At each angle ICP, CPP and Ultrasound assessment of cerebral blood flow velocities and IJV cross-sectional area at three cervical levels are recorded.
Physiological parameters including arterial blood pressure, ICP, and cerebral perfusion pressure are recorded at each angle. Doppler ultrasonography of the middle cerebral artery is performed for flow assessment. Ventilation parameters, sedation, and vasopressor support are maintained constant. Safety criteria for immediate cessation of the procedure includes ICP >20 mmHg, CPP <60 mmHg, or oxygen desaturation, the same criteria that would have stoped the routine nursing care. Data are analyzed to characterize the nonlinear relationship between trunk angle and cerebral venous outflow, with particular focus on the collapse threshold α.
Studientyp
Einschreibung (Geschätzt)
Kontakte und Standorte
Studienkontakt
- Name: David ROURE
- Telefonnummer: +33 05 57 87 02 01
- E-Mail: david.roure@chu-bordeaux.fr
Studienorte
-
-
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Bordeaux, Frankreich
- Bordeaux University Hospital
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Kontakt:
- David ROURE
- Telefonnummer: +33 05 57 87 02 01
- E-Mail: david.roure@chu-bordeaux.fr
-
Hauptermittler:
- Grégoire CANE, Dr
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Unterermittler:
- David ROURE
-
-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- Patients ≥ 18 years old
- Hospitalized in the neurocritical care unit or the trauma unit
- Scheduled for nursing care requiring a supine position.
- Arterial catheter allowing continuous measurement of mean arterial pressure.
- Central venous catheter for continuous measurement of central venous pressure.
- External ventricular drain or intracranial pressure sensor for intracranial pressure monitoring.
- Bed with controlled inclination capability.
- Clinically stable condition allowing transient positional changes (as judged by the clinician).
- Not included, or planned to be included in another trial.
Exclusion Criteria:
- Contraindication to trunk mobilization.
- Being a minor or placed under supervision.
- Hemodynamic or respiratory instability.
- Uncontrolled intracranial hypertension, refractory arterial hypertension, or severe dysautonomia.
- Pregnancy or breastfeeding.
- Refusal to participate in the study.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
Intervention / Behandlung |
|---|---|
|
Experimental group
Patients ≥ 18 years old hospitalized in the neurocritical care unit or the trauma unit in clinically stable condition allowing transient positional changes
|
After the routine nursing care, during patient repositioning to 30 ° assessments are performed at 0, 10° 20° 30°, and at a calculated threshold angle α.
At each angle intracranial pressure , cerebral perfusion pressure and ultrasound assessment of cerebral blood flow velocities and internal jugular vein cross-sectional area at three cervical levels are recorded.
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Intracranial pressure
Zeitfenster: At inclusion (day 0)
|
After the routine nursing care, during patient repositioning to 30 ° assessments are performed at 0, 10° 20° 30°, and at a calculated threshold angle α.
At each angle intracranial pressure is recorded.
|
At inclusion (day 0)
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Cerebral perfusion pressure at 30° and at angle α (1)
Zeitfenster: At inclusion (day 0)
|
Comparison of Cerebral perfusion pressure values based on mean arterial pressure measured at the tragus and intracranial pressure obtained via transcranial Doppler using a cardiac probe at the M1 segment of the ipsilateral middle sylvian artery corresponding to the jugular vein under study.
|
At inclusion (day 0)
|
|
Cerebral perfusion pressure at 30° and at angle α (2)
Zeitfenster: At inclusion (day 0)
|
Comparison of Cerebral perfusion pressure values based on diastolic, systolic, and mean blood flow velocities obtained via transcranial Doppler using a cardiac probe at the M1 segment of the ipsilateral middle sylvian artery corresponding to the jugular vein under study.
|
At inclusion (day 0)
|
|
Cerebral perfusion pressure at 30° and at angle α (3)
Zeitfenster: At inclusion (day 0)
|
Comparison of Cerebral perfusion pressure values based on pulsatility index obtained via transcranial Doppler using a cardiac probe at the M1 segment of the ipsilateral middle sylvian artery corresponding to the jugular vein under study.
|
At inclusion (day 0)
|
|
Intracranial pressure
Zeitfenster: At inclusion (day 0)
|
Ultrasound measurement using a vascular probe at angles of 0°, 10°, 20°, 30°, and the calculated angle α.
|
At inclusion (day 0)
|
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Variation in internal jugular vein luminal cross-sectional area.
Zeitfenster: At inclusion (Day 0)
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Intra-subject statistical analysis for modeling the relationship between angle and intracranial pressure
|
At inclusion (Day 0)
|
Mitarbeiter und Ermittler
Sponsor
Ermittler
- Hauptermittler: Grégoire CANE, Dr, University Hospital, Bordeaux
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
- CHUBX 2026/011
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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