- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT04101006
Perioperative Changes of Cerebrovascular Autoregulation and Association With Cognitive Function
Cerebrovascular Autoregulation During Major Non-cardiac Surgery and Risk for Postoperative Cognitive Dysfunction in Elderly Patients
Cerebral blood flow is tightly regulated to ensure constant cerebral perfusion independently from systemic blood pressure fluctuations. This mechanism is termed cerebrovascular autoregulation and preserves adequate cerebral perfusion in a range between 50 and 150 mmHg of cerebral perfusion pressure. Upper and lower autoregulatory limits may vary individually. Beyond the autoregulatory range the protective autoregulatory response is lost, facilitating cerebral ischemia or hyperemia.
The cerebrovascular response may be altered during general anesthesia, through direct effects of anesthetic agents on the vascular tone, changes of arterial partial pressure of carbon dioxide or the administration of vasoactive substances. The association of perioperative impairment of cerebral autoregulation and postoperative cognitive function has been discussed controversially.
Studieöversikt
Status
Betingelser
Detaljerad beskrivning
- continuous monitoring of cerebrovascular autoregulation using the correlation method
- based on near-infrared spectroscopy and invasive blood pressure measurement an index (COx) will be calculated
- autoregulation monitoring from anesthesia induction until emergence from anesthesia
- assessment of preoperative cognitive function during preanesthesia evaluation or on the day before surgery
- assessment of postoperative cognitive function between day 3 and 14 following surgery
- evaluation of subjective cognitive complaints or attention deficits 3 months after surgery
Studietyp
Inskrivning (Faktisk)
Kontakter och platser
Studieorter
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Hamburg, Tyskland, 20246
- Department of Anesthesiology, University Medical Center Hamburg-Eppendorf
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Testmetod
Studera befolkning
Beskrivning
Inclusion Criteria:
- elective major non-cardiac/non-vascular surgery
- anticipated surgical duration >120 minutes
- age >= 60 years
- indication for invasive blood pressure measurement
- native German speaker
Exclusion Criteria:
- history of cerebrovascular disease
- preexisting cognitive impairment
- history or presence of neurological disease
Studieplan
Hur är studien utformad?
Designdetaljer
- Observationsmodeller: Kohort
- Tidsperspektiv: Blivande
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Postoperative change of cognitive function from baseline
Tidsram: preoperative psychometric evaluation on the day before surgery, postoperative psychometric evaluation between day 3 and 14 after surgery
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change of cognitive function following surgery compared with preoperative cognitive performance, defined as: z-score <-1.96/>1.96 in two or more neuropsychological tests (California Verbal Learning Test for verbal learning, Grooved Pegboard Test for visual motoric coordination, Digit Span forward task for attention and memory, Trail-Making-Test A and B for executive function) and/or a combined z-score >1.96
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preoperative psychometric evaluation on the day before surgery, postoperative psychometric evaluation between day 3 and 14 after surgery
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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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cognitive failures three months following surgery
Tidsram: three months after elective surgery
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Self-assessment of cognitive failures using a validated questionnaire (Cognitive Failures Questionnaire).
The questionnaire evaluates self-reported failures in perception, memory, and motor function.
The questionnaire contains 25 items on a 5-point Likert scale.
Total sum score from 0 (minimum) to 100 (maximum).
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three months after elective surgery
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Samarbetspartners och utredare
Utredare
- Huvudutredare: Marlene Fischer, MD, PhD, Department of Anesthesiology, University Medical Center Hamburg-Eppendorf
Publikationer och användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- PV4771
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