Related Experiment Video
Updated: Feb 7, 2026

Assessment of Stress Effects on Cognitive Flexibility using an Operant Strategy Shifting Paradigm
Published on: May 4, 2020
Paradigm shift: should the elderly undergo propofol sedation for DBE? A prospective cohort study
Hey-Long Ching1, Federica Branchi2, David S Sanders1
1Department of Gastroenterology, Royal Hallamshire Hospital Sheffield Teaching Hospitals, Sheffield, UK.
Objective:
Evaluate the safety of propofol-assisted double balloon enteroscopy (DBE) in elderly patients against a younger cohort.
Design:
Prospective cohort study.
Setting:
All patients undergoing DBE over a 30-month period were recruited at our tertiary centre.
Patients:
215 procedures in 161 patients were performed. An age cut-off of 65 years and above was used to define those who were elderly.
Interventions:
Patients were subcategorised into four groups: elderly or young undergoing DBE with propofol or conventional sedation (with midazolam±fentanyl).
Main Outcome Measures:
Patient demographics, comorbidities, procedural data, complications, diagnostic and therapeutic yield were compared.
Results:
Cardiovascular disease and a higher American Society of Anaethesiologists (ASA) status were more prevalent in elderly patients undergoing DBE with propofol (p<0.05). Common indications for DBE were occult and overt obscure gastrointestinal bleeding and suspected Crohn's disease (elderly vs young: 50.7% vs 42.3%, 17.8% vs 12% and 19.2% vs 26.1%, respectively). Diagnostic yield was higher in elderly compared with young patients (75.3% vs 58.5%, p=0.016). The most common findings in elderly and young patients were angioectasia (30.1% and. 18.3%, respectively) and ulcers (17.8% and 9.2%, respectively), while therapeutic intervention rates were comparable (42.5% vs 32.4%, p=0.18). ASA status did not affect propofol dose (p=0.55) or procedure duration (p=0.31). Tolerance scores were favourable in those receiving propofol compared with conventional sedation (p<0.05). There was no difference in complications between the four groups (p=0.17).
Conclusion:
Compared with young patients, propofol-assisted DBE in the elderly is safe and has a high diagnostic yield.
Related Concept Videos
Sedatives and Hypnotics: Overview
Sedative-hypnotics are categorized into barbiturates, benzodiazepines (BZDs), and non-benzodiazepines or Z-drugs. These drugs work by suppressing central nervous system activity, and this suppression is dose-dependent. Older sedative medications, like barbiturates, follow a linear curve in...
Sedatives and Hypnotics Drugs: Barbiturates
Sedatives and Hypnotics Drugs: Benzodiazepines
Benzodiazepines work by enhancing the effects of the inhibitory neurotransmitter GABA. They bind to the GABAA receptor, increasing its affinity for GABA, which opens chloride...
Sedatives and Hypnotics Drugs: Miscellaneous Agents
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Proton (¹H) NMR: Chemical Shift
Absorption signals of all the protium nuclei...
NMR Spectroscopy: Chemical Shift Overview
For instance, the proton...
