New hope for preventing Post-Surgery confusion in seniors
NCT ID NCT05242692
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether giving a small amount of s-ketamine during chest surgery could reduce the risk of postoperative delirium (sudden confusion) in patients aged 60 and older. Over 500 participants were randomly assigned to receive either s-ketamine or another drug (dexmedetomidine) during their operation. The goal was to see if s-ketamine works as well as the standard treatment for preventing confusion after surgery.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Early phase 1
The earliest testing in people: a first look at safety, in a very small group.
- Participants
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520 people
The number who actually took part.
- Started
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Jun 2022
- Finished
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Aug 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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60 to 90 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Aged 60 years or over * Both genders * American anesthesiologist association (ASA) physical status classificationⅠ-Ⅲ * Diagnosed with lung, esophagus, or mediastinum disorders * Undergoing open or video-assisted thoracic surgery including lobectomy, segmentectomy, pneumonectomy, esophagectomy, or resection of mediastinal tumor * General anesthesia with one-lung ventilation (OLV) or bronchial blocker. * An expected operation duration of 2 hours or more. * Voluntarily participate in the trial and sign informed consent. Exclusion Criteria: * History of psychiatric disease or severe depression * History of glaucoma or hyperthyroidism * History of severe hepatic (Child-Pugh grade C) or renal (requirement for renal replacement therapy) disorder. * Body mass index (BMI) greater 35 kg/m2 * Dementia history or baseline Mini-Mental State Examination (MMSE) score less than 23 * Severe audio-visual impairments, or inability to speak Mandarin or Cantonese precluding communication * Sinus bradycardia (heart rate \< 50 beats per minutes, bpm), sick sinus or Wolff- Parkinson-White syndromes, or Ⅱ degree atrioventricular block and over * Poorly controlled hypertension (resting systolic blood pressure over 180 mm Hg, or resting diastolic blood pressure over 100 mm Hg) * Allergic to dexmedetomidine, S-ketamine or any of their formulation ingredients; * Taking sedatives, antidepressants or glucocorticoids * Alcohol or drug abuser * Life expectancy of less than 2 months due to extensive tumor metastasis.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Cancer hospital and institute of Guangzhou medical university
Guangzhou, Guangdong, 510095, China
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Could a sleep drug shield older hearts from post-surgery delirium?
- Could a common sedative shield aging brains from Post-Surgery delirium?