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CompletedNCT00192959Updated Sep 19, 2005

Xenon Inhalation During Orthopaedic Surgery in Elderly Subjects.

A Phase 3 interventional study of Xenon vs propofol in Anaesthesia and Postoperative Cognitive Function, sponsored by Rigshospitalet, Denmark. Completed at 1 site in Denmark. Open to participants aged 60 Years and older. Per ClinicalTrials.gov, last updated 2005-09-19.

Sponsored by Rigshospitalet, Denmark · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
44
Allocation
Randomized
Ages
60 Years and older
Sex
All
01

Study summary

The primary objective was to explore the feasibility of inhaled xenon for sedation in terms of its effect on postoperative cognitive function in elderly, in comparison with the postoperative cognitive function found after IV propofol sedation in the same population.The secondary objectives were designed to assess the feasibility of xenon sedation in terms of its effects on different neuropsycho-logical test variables, vital signs, sedation levels and safety in elderly orthopaedic subjects.

Read the detailed description

Primary endpoint: - The primary efficacy parameter was a combined score based on the seven variables derived from four validated neuropsychological tests of cognitive function; Visual Verbal Learning test, Concept Shifting test, Stroop Color Word Interference test and Letter Digit Coding test. The parameter was used for comparing changes in test results between the screening and first postoperative follow-up testing for the treatment groups.Secondary endpoints:- Cognitive performance changes from baseline to the first post-operative follow-up judged separately for each of the seven variables from the changes in the test results.- Cognitive performance changes from baseline to the second postoperative follow-up judged separately and globally for each of the seven variables from the changes in test results.- Adequacy of ventilation (respiratory rate and pulse oximetry)- Adequacy of xenon sedation by monitoring depth of unconsciousness, signs of airway irritation, need for additional sedatives, time to recovery from anaesthesia. - Technical performance of xenon delivery device

02

Conditions studied

  • Anaesthesia
  • Postoperative Cognitive Function

Keywords

  • Anaesthesia
  • Surgery
  • Postoperative
  • Neuropsychological test
03

In context

Respiratory Aspiration

1,092 studies on the registry are indexed under Respiratory Aspiration; 216 are open to participants now.

This study's enrollment of 44 is close to the median of 42 across 881 interventional studies indexed under Respiratory Aspiration.

Browse Respiratory Aspiration studies →

Lead sponsor

Rigshospitalet, Denmark is the lead sponsor of 1,017 studies on the registry; 183 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
60 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male or female subjects ≥ 60 years of age.
  • American Soc. of Anaesthesiologists Physical Status Classification (ASA) I-III status [27]
  • Referred for elective orthopaedic knee surgery with an anticipated duration of > 45 min
  • Expected to remain in hospital for at least 3 days
  • Expected to be able to comply with the study protocol throughout the study period
  • Mini Mental State Examination (MMSE) score > 23
  • Informed consent given

Exclusion criteria

Exclusion Criteria:

  • Disease of the CNS (infectious, metabolic, tumours, dementia, epilepsy, major psychiatric disease, confusion/ delirium according to Diagnostic \& Statistical Manual of Mental Disorders (DSM) IV criteria)
  • Contradiction for spinal anaesthesia
  • Contradiction for laryngeal mask
  • Regular use of tranquillisers, or antidepressants, if prescribed by psychiatrist for psychosis or depression
  • Undergone neuropsychological testing within the last year
  • Unable to follow study procedures, illiteracy, or poor comprehension of the language used in the psychometric tests
  • Severe visual or auditory disorder
  • Alcoholism or drug abuse

CNS disease BMI > 35 Inab

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single
Enrollment
44 participants

Interventions

  • DrugXenon vs propofol
06

What researchers measure

Primary outcomes

  1. Primary endpoint: -cognitive function; Visual Verbal Learning test, Concept Shifting test, Stroop Color Word Interfer

Secondary outcomes

  1. Secondary endpoints:-

  2. Vital signs

  3. Side effects

07

Study locations

1 site
  • Rigshospitalet
    Copenhagen, 2100, Denmark
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 19, 2005, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00192959
Lead sponsor
Rigshospitalet, Denmark
Collaborators
Linde AG
First posted
Sep 19, 2005
Start date
Mar 2004
Completion
Dec 2004
Last update
Sep 19, 2005

Study contacts

Lars S Rasmussen, MD PhD
principal investigator · Rigshospitalet, Denmark
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jun 2005. You cannot join it, but the record below documents what was studied.

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