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Lo studio sulla caffeina, il delirio postoperatorio e il cambiamento dei risultati dopo l'intervento chirurgico (CAPACHINOS-2)

5 novembre 2026 aggiornato da: Phillip Vlisides, University of Michigan

The objective of this study is to test the effects of caffeine on neurocognitive and clinical recovery after major surgery. Specifically, this trial tests the primary hypothesis that caffeine will reduce the incidence of postoperative delirium.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Delirium is a syndrome characterized by failure of basic cognitive functions that affects approximately 20-50% of older surgical patients. Delirium during surgical recovery is associated with increased mortality, cognitive and functional decline, and prolonged hospitalization. In fact, 3-year survival rates for acutely hospitalized patients with delirium, and subsyndromal delirium, are both less than 50%. Older age is predictive of delirium after surgery, and with aging surgical populations, the incidence of postoperative delirium and related complications are likely to increase in the coming years.

Caffeine represents a novel, neurobiologically informed candidate intervention for reducing risk of early postoperative delirium. Caffeine promotes arousal via adenosine receptor antagonism and improves cognitive function concurrent with increased cortical cholinergic tone. Our preliminary data suggest that caffeine reduces risk of postanesthesia care unit (PACU) delirium in adult non-cardiac surgery patients by optimizing cortical dynamics for cognition. Caffeine also optimizes key neurocognitive processes that support information processing and may improve other, related aspects of clinical recovery, such as rebound headache in habitual caffeine users. The objective of this trial is to thus test the effects of caffeine on neurocognitive and clinical recovery after major surgery. Specifically, the primary hypothesis is that caffeine will reduce the incidence of postoperative delirium. The secondary objectives are to (1) test whether caffeine positively impacts the quality of postoperative recovery via validated patient-reported measures and (2) identify neural correlates of delirium and Mild Cognitive Impairment via advanced electroencephalographic (EEG) analysis.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

250

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

    • Michigan
      • Ann Arbor, Michigan, Stati Uniti, 48109
        • Michigan Medicine

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

70 anni e precedenti (Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  1. Adult (>/= 70 years old) undergoing non-cardiac, non-intracranial neurologic, non-major vascular surgery requiring general anesthesia with a planned admission for at least 48 hours.
  2. Stated willingness to comply with all study procedures and availability for the duration of the study.
  3. Provision of signed and dated informed consent form.

Exclusion Criteria:

  1. Emergency surgery
  2. Outpatient surgery
  3. Severe cognitive impairment precluding the capacity for informed consent
  4. Seizure disorder history
  5. Intolerance or allergy to caffeine (based on subjective reporting or objective documentation)
  6. Weight >130 kg (as a 3 mg/kg dose would approach the upper limit of daily intake recommended by the FDA)
  7. Enrollment in conflicting research study
  8. Patients in acute liver failure
  9. Acute kidney injury preoperatively
  10. Diagnosis of pheochromocytoma
  11. Active carcinoid syndrome
  12. Severe audiovisual impairment
  13. Non-English speaking

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Quadruplicare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Comparatore placebo: Control

Prepared intravenous piggyback solution of 5 percent dextrose water at multiple postoperative time points over a 30-minute infusion period.

Dextrose 5% in water

Sperimentale: Low-dose Caffeine

Prepared intravenous low-dose caffeine citrate (1.5 mg/kg) at multiple postoperative time points over a 30-minute infusion period.

Low-dose caffeine citrate (1.5 mg/kg)

High-dose Caffeine citrate (3 mg/kg)

Sperimentale: High-dose Caffeine

Prepared intravenous high-dose caffeine citrate (3 mg/kg) at multiple postoperative time points over a 30-minute infusion period.

Low-dose caffeine citrate (1.5 mg/kg)

High-dose Caffeine citrate (3 mg/kg)

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Delirium
Lasso di tempo: Day of surgery through afternoon of postoperative day three

Any positive delirium screen (yes/no) as determined by the long-form Confusion Assessment Method (CAM), and supplemented by a validated daily chart review method.

Day of surgery through afternoon of postoperative day three

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Delirium Severity
Lasso di tempo: Day of surgery through afternoon of postoperative day three

For all participants screened for delirium, the associated severity score will be recorded using the Confusion Assessment Method Long Form Severity Score (CAM-S) (n, 0-19, with higher number indicating more severe delirium)

Day of surgery through afternoon of postoperative day three
Delirium Duration
Lasso di tempo: Day of surgery through afternoon of postoperative day three

The cumulative number of days (n) with a positive delirium screen will be calculated for all participants

Day of surgery through afternoon of postoperative day three
Patient-Reported Quality of Recovery
Lasso di tempo: Preoperative baseline through postoperative day three afternoon

Assessed via the 15-item Quality of Recovery Score (n, 0-150, with higher number indicating better quality of recovery from the patient perspective)

Preoperative baseline through postoperative day three afternoon
Sedation
Lasso di tempo: Preoperative baseline through postoperative day three afternoon

Any positive screen based on the Richmond Agitation Sedation Scale (RASS; n, -5 to +4). Scores from -5 to -2 will count as a positive screen for sedation.

Preoperative baseline through postoperative day three afternoon
Agitation
Lasso di tempo: Preoperative baseline through postoperative day three afternoon

Any positive screen based on the Richmond Agitation Sedation Scale (RASS; n, -5 to +4). Scores from +2 to +4 will count as a positive screen for agitation

Preoperative baseline through postoperative day three afternoon
Headache
Lasso di tempo: Preoperative baseline through postoperative day three afternoon

Headache severity will be assessed via 10-centimeter visual analog scale (0-100 mm, with higher score indicating more severe headache)

Preoperative baseline through postoperative day three afternoon
Cumulative Opioid Consumption
Lasso di tempo: Day of surgery through postoperative day three afternoon

Postoperative opioid consumption, oral morphine equivalents (mg)

Day of surgery through postoperative day three afternoon

Altre misure di risultato

Misura del risultato
Misura Descrizione
Lasso di tempo
Anesthetic Emergence
Lasso di tempo: Duration of time from surgical dressing completion to anesthetic emergence (min); generally expected to be between 10 and 60 minutes

Time (minutes) from surgical closure to extubation

Duration of time from surgical dressing completion to anesthetic emergence (min); generally expected to be between 10 and 60 minutes
Pulmonary Complications
Lasso di tempo: From extubation until end of postanesthesia care unit stay

Composite outcome (yes/no) of any of the following: airway adjunct use, unplanned continuous positive airway pressure device, unplanned humidified high-flow oxygen, need for bag-mask ventilation, or reintubation

From extubation until end of postanesthesia care unit stay
Hospital Length of Stay
Lasso di tempo: Morning of surgery until day of hospital discharge, up to 30 days

Total number of days (n) spent in the hospital, up to 30 days

Morning of surgery until day of hospital discharge, up to 30 days
Discharge Disposition
Lasso di tempo: Day of hospital discharge, up to 30 days

Proportion of patients in each group (%) discharged somewhere other than home (e.g., Long-Term Care Facility), up to 30 days

Day of hospital discharge, up to 30 days
30-Day Cognitive Function
Lasso di tempo: 30 days after hospital discharge

Cognitive function score based on the Montreal Cognitive Assessment (n, 0-30, with higher scores reflecting higher cognitive function)

30 days after hospital discharge
30-Day Physical Function
Lasso di tempo: 30 days after hospital discharge

Physical function score based on the Patient Reported Outcomes Measurement Information System (PROMIS) Physical Function 10a score (n, 10-50, with higher score indicating better physical function)

30 days after hospital discharge

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Collaboratori

Investigatori

  • Investigatore principale: Phillip Vlisides, MD, Assistant Professor of Anesthesiology

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

20 febbraio 2023

Completamento primario (Effettivo)

16 aprile 2026

Completamento dello studio (Effettivo)

20 maggio 2026

Date di iscrizione allo studio

Primo inviato

6 ottobre 2022

Primo inviato che soddisfa i criteri di controllo qualità

6 ottobre 2022

Primo Inserito (Effettivo)

10 ottobre 2022

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

10 novembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

5 novembre 2026

Ultimo verificato

1 luglio 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • HUM00218290
  • R01AG075005 (Sovvenzione/contratto NIH degli Stati Uniti)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

SÌ

Descrizione del piano IPD

Clinical and electroencephalographic data will be preserved and made available for sharing. Data will be saved in various formats, such as comma-separated values (CSV), open document format (ODF), and European Data Format (EDF) for waveform data. Software programs designed to accommodate electroencephalographic waveform data (e.g., MATLAB) will be required for data access and analysis. Specific software and coding recommendations can be made available upon data sharing request.

Any data not permitted to be shared, as specified in written informed consent documents, will be withheld. Likewise, no data will be shared that may compromise the safety or privacy of participants, and no data will be shared that would violate local, state, or federal laws or policies (including the Health Insurance Portability and Accountability Act). All data will be de-identified.

Periodo di condivisione IPD

Scientific data will be made available after primary trial manuscripts (for both clinical and electroencephalographic data) are accepted for publication. Data will be made available for as long as possible in compliance with National Institutes of Health and University of Michigan policies.

Criteri di accesso alla condivisione IPD

Data will be shared upon execution of Data Use Agreements in compliance with University of Michigan policies and procedures. Interested researchers will need to contact the study PI (Dr. Vlisides) for obtaining data via Data Use Agreement. All data will be shared upon reasonable request after primary trial manuscripts are published.

Tipo di informazioni di supporto alla condivisione IPD

  • STUDIO_PROTOCOLLO
  • LINFA
  • ICF

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

Sì

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

prodotto fabbricato ed esportato dagli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .