Plain English Summary
Background and study aims
Surgery has to be as safe as possible and patients are prepared to be in the best condition possible before elective surgery. The main role of anesthesiologist during surgery is managing and treating changes in patient's critical life functions (such as breathing, heart rate, blood pressure etc) by giving them a medication called anesthesia. Patients are required to be in their medically induced coma temporary coma before the surgeon can begin surgery, as well it is helpful to be in the coma while the breathing tube is placed in patients throats as this is painful and unpleasant. Then, patients require their breathing airway to be secured by a breathing tube placed in the throat, which is painful and unpleasant. Therefore, it is important that patients are placed into their coma for the surgery quickly and safely. Different medications are used during surgery, and one of the most common ones used is called propofol. Another commonly used medication is called esketamine. Sometimes these are mixed together for outpatient procedure situations. The mixture is known as “ketofol”. Ketofol is not used for the induction of coma for general anesthesia but could have the potential to. The aim of this study is to see if undergoing anesthesia with ketofol is able to provide stable critical life function parameters than propofol and to examine different mixtures of ketofol in order to help establish a standardized formula of what should be in the mixture.
Who can participate?
Healthy adults aged between 18 and 80 years old with no severe chronic illness undergoing elective surgery requiring general anesthesia.
What does the study involve?
Participants are randomly allocated to one of three groups. All participants undergo the surgery but receive different anaesthesia based on their allocation. Those in the first group receive ketofol with profol:esketamin ratio of 1:1. Those in the second group receive ketofol with profol:esketamin ratio 2:1. Those in the last group receive propofol. Surgeries are done to the standard level of care. Participants have their vital signs, hemodinamic status (measuring of heart function) and coma depth monitored throughout the surgery.
What are the possible benefits and risks of participating?
There are no notable benefits or risks involved with participating.
Where is the study run from?
Maribor University Medical Centre (Slovenia)
When is the study starting and how long is it expected to run for?
January 2017 to December 2018
Who is funding the study?
Maribor University Medical Centre (Slovenia)
Who is the main contact?
Dr Domen Kogler
domen.kogler@gmail.com
Study website
Contact information
Type
Public
Contact name
Mr Domen Kogler
ORCID ID
http://orcid.org/0000-0003-1022-3032
Contact details
Maribor University Medical Centre
Ljubljanska ulica 5
Maribor
2000
Slovenia
Additional identifiers
EudraCT/CTIS number
IRAS number
ClinicalTrials.gov number
Protocol/serial number
KME 39/08/16
Study information
Scientific title
Hemodynamic stability during anesthesia induction with propofol/esketamine (ketofol) mixture – identifying optimal ratio
Acronym
Study hypothesis
The aim of this study is to compare the hemodynamic stability during anesthesia induction with ketofol in different concentration mixtures.
Ethics approval(s)
Republic of Slovenia National Medical Ethics Committee - NMEC, 25/09/2016, ref: 0120-395/2016-2; KME 39/08/16
Study design
Randomised double blind controlled parallel trial
Primary study design
Interventional
Secondary study design
Randomised parallel trial
Study setting(s)
Hospital
Study type
Treatment
Patient information sheet
See additional files
Condition
Elective surgery with orotracheal intubation
Intervention
Participants undergoing elective surgery are randomly allocated to one of three groups. Randomisation is done by an independent person using a draw. The following groups are:
Group K1: Participants in this group receive an anesthetic mixture of 10 ml 1% propofol and 4 ml 2,5% esketamine
Group K2: Participants in this group receive an anesthetic mixture mixture of 10 ml 1% propofl, 2 ml 2,5% esketamine and 2 ml 0,9% NaCl solution
Group P: Participants in this group receive an anesthetic mixture of 10 ml 1% propofol and 4 ml 0,9% NaCl solution (control)
All participants are premedicated with midazolam one hour before surgery. All patients follow the same protocol for first 16 minutes, the only variable is anaesthetic mixture. Anaesthesia induction starts at time 0 when patient gets 0,25 mcg/kg of sufentanyl (concentration 5 mcg/ml, rounded to nearest ml). At 120 seconds all participants receive 5 ml bolus of anaesthetic mixture following titration with 1 ml until clinical effect (lose of palpebral efect). Then 0,6 mg/kg (concentration 10mg/ml, rounded to nearest ml) is administered to patient following another 2ml of anaesthetic mixture. Between minute 4 and 5 (time 240 s to 300 s) the patient is intubated and then mechanically ventilated, maintaining anesthesia with sevoflurane 1,0-1,5 vol%.
Dosing is titrated to clinical effect (lose of palpebral effect) with blinded recording of Bispectral index.
Total duration of treatment is one hour before surgery (premedication) untill one hour after surgery (recovery from anaesthesia) for all treatment arms (sturdy groups). Duration of data collection study is first 16 minutes after application of sufentanyl (start of anaesthesia induction). Follow up is the same for all treatments arms and ends one hour after surgery (recovery from anaesthesia).
Intervention type
Drug
Pharmaceutical study type(s)
Phase
Not Applicable
Drug/device/biological/vaccine name(s)
Propofol, esketamine
Primary outcome measure
1. Cardiac output is measured noninvasively using transthoracal electric bioimpedance every minute for first 16 minutes after induction of anesthesia
2. Blood pressure is measured noninvasively using arm cuffs every 2 minutes for first 16 minutes after induction of anesthesia
3. Heart rate is measured by ECG every minute for first 16 minutes after induction of anesthesia
Secondary outcome measures
1. Bispectral index (BIS) (depth of sedation or anaesthesia) is monitored with 15 seconds sampling using forehead electrodes every minute for first 16 minutes after induction of anesthesia.
2. Dose titrated to clinical effect (loss of palpebral effect)
Overall study start date
01/01/2017
Overall study end date
31/12/2018
Reason abandoned (if study stopped)
Eligibility
Participant inclusion criteria
1. Aged 18-80 years
2. ASA Physical Status I or II
3. Elective surgery with orotracheal intubation
Participant type(s)
Patient
Age group
Adult
Lower age limit
18 Years
Upper age limit
80 Years
Sex
Both
Target number of participants
100
Participant exclusion criteria
1. Allergy or sensitivity to any medication used in trial
2. Alcohol or drug abuse
3. Chronical use of benzodiazepins, opiats or psyhothrophic medication
4. Body mass index higher than 35 or lower than 15
5. Anticipated difficult intubation (Mallampati III or IV)
6. Untreated arterial hypertension
7. Patients with Alzheimers, epilepsy or psychosis
Recruitment start date
01/08/2017
Recruitment end date
30/06/2018
Locations
Countries of recruitment
Slovenia
Study participating centre
University Clinical Centre Maribor
Ljubljanska ulica 5
Maribor
2000
Slovenia
Sponsor information
Organisation
University Clinical Centre Maribor
Sponsor details
Ljubljanska ulica 5
Maribor
2000
Slovenia
Sponsor type
Hospital/treatment centre
Website
ROR
Funders
Funder type
University/education
Funder name
University Clinical Centre Maribor
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Results and Publications
Publication and dissemination plan
Planned publication in a impact peer reviewed journal.
Intention to publish date
10/10/2019
Individual participant data (IPD) sharing plan
The datasets generated during and/or analysed during the current study are/will be available upon request from Domen Kogler at domen.kogler@gmail.com
IPD sharing plan summary
Available on request
Study outputs
Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
---|---|---|---|---|---|
Participant information sheet | 02/08/2017 | No | Yes |
Additional files
- ISRCTN59349598_PIS.pdf Uploaded 02/08/2017