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Resistance Under the Microscope

This study has been completed.
Information provided by (Responsible Party):
Markus Klimek, Erasmus Medical Center Identifier:
First received: September 22, 2011
Last updated: March 1, 2016
Last verified: March 2016

The purpose of this study is to determine whether lorazepam, which is used to lower preoperative anxiety, also improves postoperative recovery.

This study data will also be used for further research aiming to identify vulnerable patients in the day-case surgery setting.

Condition Intervention Phase
Drug: Lorazepam
Drug: NaCl 0.9% (Sodium Chloride)
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Resistance Under the Microscope; a Randomized Placebo Controlled Parallel Group Design

Resource links provided by NLM:

Further study details as provided by Erasmus Medical Center:

Primary Outcome Measures:
  • Quality of Recovery Score [ Time Frame: Baseline; first postoperative working day; seventh postoperative day. ]

    The Quality of Recovery Score - 40 (QoR-40), a 40-item scale, is used to assess the quality of recovery.

    Each item is rated on a five-point Likert scale (1-5), and the QoR-40 score is calculated as the sum of the scores on these items. Minimal possible score = 40, maximal possible score = 200. A higher score indicates a higher level of quality of recovery.

Secondary Outcome Measures:
  • Anxiety [ Time Frame: baseline; after surgery but before discharge; 1 week after surgery ]
    The State-Trait Anxiety Inventory (STAI) is used to assess anxiety. Scores are calculated by summing the scores on the items, and a higher score indicates a higher level of anxiety.

  • Fatigue [ Time Frame: baseline; 1 week after surgery ]
    The Multidimensional Fatigue Inventory (MFI) is used to assess the change in fatigue. The MFI is a self-report instrument designed to measure fatigue. Scores are calculated by summing the scores on the items, and a higher score indicates a higher level of fatigue.

  • Aggression Regulation [ Time Frame: baseline; 1 week after surgery ]
    The State-Trait Anger Scale (STAS) is used to assess the aggression regulation. STAS is one of the most used tools for measuring aggression. Scores are calculated by summing the scores on the items, and a higher score indicates a higher level of aggression

  • Depressive Mood [ Time Frame: baseline; 1 week after surgery ]
    The Hospital Anxiety and Depression Scale (HADS) is used to assess the change in depression. The HADS is a well known international outcome measurement for anxiety and depression. It is often used in the clinical setting. Scores are calculated by summing the scores on the items, and a higher score indicates a higher level of depression.

  • Somatic Symptoms and Complaints [ Time Frame: Baseline; first postoperative working day; 1 week after surgery ]
    Medical records are used to assess somatic symptoms and complaints. Next to the medical records, dimensions of the QoR-40 (physical comfort, physical independence and pain) are used to measure somatic symptoms and complaints.

Enrollment: 400
Study Start Date: October 2010
Study Completion Date: September 2011
Primary Completion Date: September 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Lorazepam
Lorazepam 4mg/4ml
Drug: Lorazepam
Once 1mg <75kg body weight, 1.5mg 75kg and >75kg body weight, IV, before surgery
Other Name: Temesta
Placebo Comparator: NaCl 0.9%
NaCl 0.9% 4ml
Drug: NaCl 0.9% (Sodium Chloride)
Once 1ml <75kg body weight, 1.5ml 75kg or >75kg body weight, IV, before surgery
Other Name: NaCl 0.9%

Detailed Description:

Since the early 1980s, the investigators have seen a shift towards day-case surgery. Before surgery, many patients have negative feelings about the surgical procedure. These anxieties have various negative effects. To reduce this resistance preoperative administration of an anxiolytic drug is administered, typically a benzodiazepine. The investigators know that benzodiazepines are effective in reducing anxiety, but up to now there is nog good scientific evidence about the effectiveness of lorazepam on the quality of recovery in day-case surgery patients.

The ultimate goal of our research project is to identify patients who would benefit from preoperative benzodiazepine administration and who not. Identification would substantially contribute to optimal medical decision making.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patients > 18 years admitted to the Day-Case Surgery Department Erasmus MC

Exclusion Criteria:

  • insufficient command of the Dutch language
  • ophthalmology surgery
  • Extracorporeal Shock Wave Lithotripsy (ESWL)-, Gastrointestinal endoscopic intervention, Botox-, Abortion and Pain treatment
  • Use of psychopharmaceuticals
  • Contra-indication of lorazepam use
  Contacts and Locations
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Please refer to this study by its identifier: NCT01441843

Sponsors and Collaborators
Erasmus Medical Center
Principal Investigator: Markus Klimek, MD, PhD Erasmus Medical Center
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Markus Klimek, Vice-head of Anesthesiology, Erasmus Medical Center Identifier: NCT01441843     History of Changes
Other Study ID Numbers: NL3253507810
Study First Received: September 22, 2011
Results First Received: August 29, 2013
Last Updated: March 1, 2016

Keywords provided by Erasmus Medical Center:
quality of life
Adult patients
Ambulatory Surgical Procedures
Postoperative Period

Additional relevant MeSH terms:
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Gastrointestinal Agents
Hypnotics and Sedatives
Central Nervous System Depressants
Anti-Anxiety Agents
Tranquilizing Agents
Psychotropic Drugs
GABA Modulators
GABA Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on April 24, 2017