Robot-assisted Laparoscopic Prostatectomy Under General AnesthesiaNCT01641302
The Effect of Pneumoperitoneum and Trendelenburg Position on Intracranial Pressure: Ultrasonographic Measurement of Optic Nerve Sheath Diameter
An observational study of Robot-assisted Laparoscopic Prostatectomy Under General Anesthesia, run by Yonsei University at 1 site in South Korea.
Trial summary
The steep Trendelenburg position and pneumoperitoneum during laparoscopic surgery have the potential to cause an increase of intracranial pressure (ICP). Previous studies have proposed that ultrasonographic measurements of the optic nerve sheath diameter (ONSD) correlate with signs of increased ICP. Read more about this study
- Who is it for?
- Ages 20 to 90 years
- Conditions the study is for
- Robot-assisted Laparoscopic Prostatectomy Under General Anesthesia
- How many people
- 20 participants
- Where
- 1 siteSouth Korea
- Study dates
- Jun 2012to Aug 2013
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 90 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Patients undergoing robot-assisted laparoscopic prostatectomy under general anesthesia
Who may be able to join
- Adult patients (20-90 years of age) scheduled for undergoing robot-assisted laparoscopic prostatectomy undergoing general anesthesia
Who cannot join
- Patients with previous history of neurologic disease, carotid disease, transient ischemic attack, ocular disease and ocular surgery
Trial locations and contacts
1 site in 1 country.
South Korea1 site
Associate Professor Department of Anesthesiology and Pain Medicine,
Seoul, Seoul, 120-752
About this study
The steep Trendelenburg position and pneumoperitoneum during laparoscopic surgery have the potential to cause an increase of intracranial pressure (ICP). Previous studies have proposed that ultrasonographic measurements of the optic nerve sheath diameter (ONSD) correlate with signs of increased ICP. Therefore, this study is aim to confirm the increased ICP by ultrasonographic measurement of ONSD during laparoscopic surgery.
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Patients undergoing robot-assisted laparoscopic prostatectomy | Patients undergoing robot-assisted laparoscopic prostatectomy under general anesthesia |
What is being measured
The primary outcome is the main question the study is designed to answer.
ultrasonographic measurement of optic nerve sheath diameter
A thick layer of gel is applied on the upper closed eyelid. The linear 13- to 6-MHz ultrasound probe is then placed in the gel, without exerting pressure on the eye. Two measurements are taken for each optic nerve: one in the transverse plane, with the probe being horizontal, and one in the sagittal plane, with the probe being vertical. The final ONSD is the mean of these measurements.
Measured: before anesthesia induction, 10 minutes after anesthesia induction, 30 minutes after steep trendelenburg position and pneumoperitoneum, and 10 minutes after supine position, CO2 desufflation.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Jul 2012 (estimated)
- Study startJun 2012
- Primary completionAug 2013
- Study completionAug 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Robot-assisted Laparoscopic Prostatectomy Under General AnesthesiaStudies of the same condition, open and under way.
- More trials run by Yonsei UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Time perspective
- Prospective
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Yonsei University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01641302
- Sponsor's protocol ID
- 4-2012-0287.
- Status last verified
- Aug 2013
- First submitted
- 28 Jun 2012
- Last updated
- 7 Aug 2013
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 7 Aug 2013. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Pneumoperitoneum and Trendelenburg Position on Intracranial Pressure: Ultrasonographic Measurement of Optic Nerve Sheath Diameter
- ClinicalTrials.gov ID
- NCT01641302
- Acronym / sponsor ID
- 4-2012-0287.
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Yonsei UniversityUniversity, hospital or other
- Study start
- Jun 2012
- Primary completion
- Aug 2013 (actual)
- Study completion
- Aug 2013 (actual)
- First posted
- 16 Jul 2012 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The steep Trendelenburg position and pneumoperitoneum during laparoscopic surgery have the potential to cause an increase of intracranial pressure (ICP). Previous studies have proposed that ultrasonographic measurements of the optic nerve sheath diameter (ONSD) correlate with signs of increased ICP. Therefore, this study is aim to confirm the increased ICP by ultrasonographic measurement of ONSD during laparoscopic surgery.
Study design
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Patients undergoing robot-assisted laparoscopic prostatectomy | – | –Patients undergoing robot-assisted laparoscopic prostatectomy under general anesthesia |
Who may qualify
- Ages
- 20 to 90 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Patients undergoing robot-assisted laparoscopic prostatectomy under general anesthesia
Key inclusion criteria (1 listed)
- Adult patients (20-90 years of age) scheduled for undergoing robot-assisted laparoscopic prostatectomy undergoing general anesthesia
Key exclusion criteria (1 listed)
- Patients with previous history of neurologic disease, carotid disease, transient ischemic attack, ocular disease and ocular surgery
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
ultrasonographic measurement of optic nerve sheath diameter
Time frame: before anesthesia induction, 10 minutes after anesthesia induction, 30 minutes after steep trendelenburg position and pneumoperitoneum, and 10 minutes after supine position, CO2 desufflation.
A thick layer of gel is applied on the upper closed eyelid. The linear 13- to 6-MHz ultrasound probe is then placed in the gel, without exerting pressure on the eye. Two measurements are taken for each optic nerve: one in the transverse plane, with the probe being horizontal, and one in the sagittal plane, with the probe being vertical. The final ONSD is the mean of these measurements.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Aug 2013.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Robot-assisted Laparoscopic Prostatectomy Under General Anesthesia, run by Yonsei University at 1 site in South Korea.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Aug 2013. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in South Korea. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
ultrasonographic measurement of optic nerve sheath diameter (time frame: before anesthesia induction, 10 minutes after anesthesia induction, 30 minutes after steep trendelenburg position and pneumoperitoneum, and 10 minutes after supine position, CO2 desufflation.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Aug 2013.