SurgeryPhase 4NCT01755234
Propofol Versus Sevoflurane Recovery After Gynecological Surgery
A Phase 4 study testing Sevoflurane and Propofol in people with Surgery and Anesthesia, run by Northwestern University at 1 site in United States.
Trial summary
80% of 25 million American who undergo surgery describe moderate to severe pain. The use of multimodal analgesic techniques can attenuate patient's postoperative pain and several different medication have been found to be effective. Pain can significantly affect patient's quality of recovery after surgery. Read more about this study
- Who is it for?
- Ages 18 to 64 years, women only
- Conditions the study is for
- Surgery, Anesthesia
- What is being tested?
- Sevoflurane and Propofol
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- 1 siteUnited States
- Study dates
- Nov 2012to Apr 2014
- Phase
- Phase 4
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 18 to 64 years
- Women only
- No healthy volunteers
- Adult
Who may be able to join
- Women
- Age 18-64
- Patients undergoing ambulatory surgery
- ASA PS I, II
Who cannot join
- Chronic opioid use
- Pregnant patient
- Drop Out : patient or surgeon request
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Effects of Propofol vs. Sevoflurane Administered During Anesthesia Maintenance on Early and Late Recovery After Gynecological Surgery
80% of 25 million American who undergo surgery describe moderate to severe pain. The use of multimodal analgesic techniques can attenuate patient's postoperative pain and several different medication have been found to be effective. Pain can significantly affect patient's quality of recovery after surgery. Volatile anesthetics can increase sensitivity to pain at the low concentrations present on emergence from anesthesia. Propofol may have analgesic effect at sedative doses. The effects of propofol,when used for anesthesia maintenance, on postoperative pain have demonstrated controversial results with some investigators showing a potential benefit whereas others have not shown any benefit. Propofol for maintenance of anesthesia has been advocated as an strategy for high risk patients even though it has shown controversial results on reduction of Post operative nausea and vomiting. A comparison of propofol vs.volatile anesthetic in regards to the time required by patients to meet discharge criteria has also shown conflicting results.The QOR 40 is a validated instrument that has been specifically developed to evaluate patients recovery after anesthesia and surgery.
The purpose of this study is to compare the effects of maintenance of anesthesia with two agents (Propofol and Sevoflurane) on quality of recovery after ambulatory surgery
Read more
Significance: the results of this study can lead to the discovery of an anesthesia technique that is associated with a better recovery for patients after ambulatory surgery.
Research question is: do patients anesthetized with propofol have a better quality of recovery after ambulatory anesthesia than patients anesthetized with Sevoflurane? The hypothesis: patients anesthetized with propofol will have better quality of recovery than patients anesthetized with Sevoflurane after ambulatory surgery.
Read the detailed description
Subjects will be recruited up to the day of surgery. 90 subjects will be randomly allocated into 2 groups, using a computer generated table of random numbers: anesthetic maintenance with Sevoflurane or anesthetic maintenance with Propofol . Subjects will be premedicated with intravenous (IV) midazolam 0.04 mg/kg. Routine ASA monitors will be applied. Anesthesia will be induced with remifentanil infusion started at 0.1 mcg/kg/minute titrated to keep blood pressure within 20% of the baseline and propofol 1.0 -2.0 mg/kg or sevoflurane induction. Tracheal intubation will be facilitated with rocuronium (0.6 mg/kg) or succinylcholine (1-2mg /kg). Anesthesia will be maintained with Sevoflurane or a Propofol infusion titrated to keep a bispectral index between 40-60, remifentanil infusion started at 0.1mcg/kg/min titrated to keep blood pressure within 20 % of baseline values, and rocuronium that will be administered at the discretion of the anesthesiologist. Upon termination of the surgery, neuromuscular blockade will be antagonized with a combination of neostigmine 0.05mg/kg and glycopyrrolate 0.01 mg/kg. Subjects will also receive Ketorolac 30 mg IV after discontinuation of remifentanil for postoperative pain control. Ondansetron 4 mg IV will be administered to decrease postoperative nausea and vomiting. Subjects will receive IV hydromorphone 0.4 mg q 5 minutes as needed to achieve a verbal rating score for pain <4 out of 10.They will also receive reglan 10 mg IV as a rescue antiemetic, if not effective, a second dose of Zofran 4 mg IV will be given in PACU. 24 hours after surgery a QOR 40 will be administered to the patient by one of the investigators. The primary and secondary outcomes will be assessed by an independent observer who will be blinded to group allocation.
- Conditions
- Surgery, Anesthesia
- Being tested
- Sevoflurane, Propofol
- Keywords
- Outpatient, Surgery, Anesthesia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
SevofluraneDrug
Also called Sevoflurane,Ultane
Sevfoflurane inhaled administered by laryngeal mask airway or endotracheal tube
PropofolDrug
Also called Propofol,Diprivan
Propofol administered via intravenous catheter at an initial rate of 1.0 -2.0 mg/kg then the Propofol infusion rate will be titrated to keep a bispectral index between 40-60
| Study group | Role | What they receive |
|---|---|---|
| Sevoflurane | Active comparator | Sevoflurane administered by inhalation (laryngeal mask airway or endotracheal tube) Receives: Drug: Sevoflurane |
| Propofol | Active comparator | Propofol administered via intravenous catheter at an initial rate of 1.0 -2.0 mg/kg then the Propofol infusion rate will be titrated to keep a bispectral index between 40-60 Receives: Drug: Propofol |
What is being measured
The primary outcome is the main question the study is designed to answer.
Quality of Recovery Score 24 Hours Post Operative
Quality of recovery score 24 hours after the surgical procedure.Score of 40 is poor recovery and a score of 200 is good recovery.
Measured: 24 hours after the surgical procedure
Secondary outcomes (3)
Mg of Morphine Equivalents (IV)
Total opioid use in the post operative care unit (Mg of morphine equivalents)
Measured: PACU admission to discharge
Pain in Post Anesthesia Care Unit
Numeric rating scale for pain on a scale of 0-10 (0 is no pain and 10 is high pain) versus time curve in the post anesthesia care unit ( score * min). A higher value indicates more pain and time in the Post Anesthesia Care Unit.
The range is 0 pain to x time in minutes x 1 hour to 5 hour ( 60-300 minutes) . The pain scores were collected at 15 minute intervals from the time of admission to the PACU. The area under the NRS pain scale versus time curve was calculated using the trapezoidal method as an indicator of pain burden during early recovery (Graph Pad Prism ver 5.03, Graph Pad Software INC.
Measured: Time in the post anesthesia care unit
Opioid Use Discharge From Post Anesthesia Care Unit to 24 Hours After PACU Discharge.
Opioid use in mg of morphine equivalents from discharge from the post anesthesia care unit to 24 hours after PACU discharge.
Measured: Discharge from PACU to 24 hours post operative after PACU discharge.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Dec 2012 (estimated)
- Study startNov 2012
- Primary completionApr 2014
- Study completionApr 2014
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for SurgeryStudies of the same condition, open and under way.
- More trials run by Northwestern 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
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind
- Who is masked
- Participant, Care provider, Investigator
- Enrolment
- 90 participants (actual)
Sponsor and investigators
- Lead sponsor
- Northwestern University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Gildasio De Oliveira, Northwestern University
- Investigators
- Gildasio De Oliveira, MD, Principal investigator, Northwestern University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01755234
- Sponsor's protocol ID
- STU00070833
- Status last verified
- Feb 2016
- First submitted
- 18 Dec 2012
- Last updated
- 14 Mar 2016
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- Individual data sharing
- No
Publications
White PF, Kehlet H. Improving postoperative pain management: what are the unresolved issues? Anesthesiology. 2010 Jan;112(1):220-5. doi: 10.1097/ALN.0b013e3181c6316e. No abstract available.
PubMed 20010418White PF. The changing role of non-opioid analgesic techniques in the management of postoperative pain. Anesth Analg. 2005 Nov;101(5 Suppl):S5-S22. doi: 10.1213/01.ANE.0000177099.28914.A7.
PubMed 16334489Zhang Y, Eger EI 2nd, Dutton RC, Sonner JM. Inhaled anesthetics have hyperalgesic effects at 0.1 minimum alveolar anesthetic concentration. Anesth Analg. 2000 Aug;91(2):462-6. doi: 10.1097/00000539-200008000-00044.
PubMed 10910869Hand R Jr, Riley GP, Nick ML, Shott S, Faut-Callahan M. The analgesic effects of subhypnotic doses of propofol in human volunteers with experimentally induced tourniquet pain. AANA J. 2001 Dec;69(6):466-70.
PubMed 11837149Cheng SS, Yeh J, Flood P. Anesthesia matters: patients anesthetized with propofol have less postoperative pain than those anesthetized with isoflurane. Anesth Analg. 2008 Jan;106(1):264-9, table of contents. doi: 10.1213/01.ane.0000287653.77372.d9.
PubMed 18165589Boccara G, Mann C, Pouzeratte Y, Bellavoir A, Rouvier A, Colson P. Improved postoperative analgesia with isoflurane than with propofol anaesthesia. Can J Anaesth. 1998 Sep;45(9):839-42. doi: 10.1007/BF03012216.
PubMed 9818105Visser K, Hassink EA, Bonsel GJ, Moen J, Kalkman CJ. Randomized controlled trial of total intravenous anesthesia with propofol versus inhalation anesthesia with isoflurane-nitrous oxide: postoperative nausea with vomiting and economic analysis. Anesthesiology. 2001 Sep;95(3):616-26. doi: 10.1097/00000542-200109000-00012.
PubMed 11575532Watson KR, Shah MV. Clinical comparison of 'single agent' anaesthesia with sevoflurane versus target controlled infusion of propofol. Br J Anaesth. 2000 Oct;85(4):541-6. doi: 10.1093/bja/85.4.541.
PubMed 11064611Rohm KD, Piper SN, Suttner S, Schuler S, Boldt J. Early recovery, cognitive function and costs of a desflurane inhalational vs. a total intravenous anaesthesia regimen in long-term surgery. Acta Anaesthesiol Scand. 2006 Jan;50(1):14-8. doi: 10.1111/j.1399-6576.2006.00905.x.
PubMed 16451145Montes FR, Trillos JE, Rincon IE, Giraldo JC, Rincon JD, Vanegas MV, Charris H. Comparison of total intravenous anesthesia and sevoflurane-fentanyl anesthesia for outpatient otorhinolaryngeal surgery. J Clin Anesth. 2002 Aug;14(5):324-8. doi: 10.1016/s0952-8180(02)00367-7.
PubMed 12208434Myles PS, Weitkamp B, Jones K, Melick J, Hensen S. Validity and reliability of a postoperative quality of recovery score: the QoR-40. Br J Anaesth. 2000 Jan;84(1):11-5. doi: 10.1093/oxfordjournals.bja.a013366.
PubMed 10740540De Oliveira GS Jr, Bialek J, Rodes ME, Kendall MC, McCarthy RJ. The effect of sevoflurane compared to propofol maintenance on post-surgical quality of recovery in patients undergoing an ambulatory gynecological surgery: A prospective, randomized, double-blinded, controlled, clinical trial. J Clin Anesth. 2017 Dec;43:70-74. doi: 10.1016/j.jclinane.2017.10.001. Epub 2017 Oct 13.
PubMed 29032007
Study at a glance
From the registry record, last updated by the sponsor on 14 Mar 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of Propofol vs. Sevoflurane Administered During Anesthesia Maintenance on Early and Late Recovery After Gynecological Surgery
- ClinicalTrials.gov ID
- NCT01755234
- Acronym / sponsor ID
- STU00070833
- Conditions
- Surgery, Anesthesia
- Keywords
- Outpatient, Surgery, Anesthesia
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 90 participants (actual)
- Lead sponsor
- Northwestern UniversityUniversity, hospital or other
- Study start
- Nov 2012
- Primary completion
- Apr 2014 (actual)
- Study completion
- Apr 2014 (actual)
- First posted
- 24 Dec 2012 (estimated)
- Results
- Posted 14 Mar 2016
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
80% of 25 million American who undergo surgery describe moderate to severe pain. The use of multimodal analgesic techniques can attenuate patient's postoperative pain and several different medication have been found to be effective. Pain can significantly affect patient's quality of recovery after surgery. Volatile anesthetics can increase sensitivity to pain at the low concentrations present on emergence from anesthesia. Propofol may have analgesic effect at sedative doses. The effects of propofol,when used for anesthesia maintenance, on postoperative pain have demonstrated controversial results with some investigators showing a potential benefit whereas others have not shown any benefit. Propofol for maintenance of anesthesia has been advocated as an strategy for high risk patients even though it has shown controversial results on reduction of Post operative nausea and vomiting. A comparison of propofol vs.volatile anesthetic in regards to the time required by patients to meet discharge criteria has also shown conflicting results.The QOR 40 is a validated instrument that has been specifically developed to evaluate patients recovery after anesthesia and surgery.
The purpose of this study is to compare the effects of maintenance of anesthesia with two agents (Propofol and Sevoflurane) on quality of recovery after ambulatory surgery
Significance: the results of this study can lead to the discovery of an anesthesia technique that is associated with a better recovery for patients after ambulatory surgery.
Research question is: do patients anesthetized with propofol have a better quality of recovery after ambulatory anesthesia than patients anesthetized with Sevoflurane? The hypothesis: patients anesthetized with propofol will have better quality of recovery than patients anesthetized with Sevoflurane after ambulatory surgery.
Detailed description
Subjects will be recruited up to the day of surgery. 90 subjects will be randomly allocated into 2 groups, using a computer generated table of random numbers: anesthetic maintenance with Sevoflurane or anesthetic maintenance with Propofol . Subjects will be premedicated with intravenous (IV) midazolam 0.04 mg/kg. Routine ASA monitors will be applied. Anesthesia will be induced with remifentanil infusion started at 0.1 mcg/kg/minute titrated to keep blood pressure within 20% of the baseline and propofol 1.0 -2.0 mg/kg or sevoflurane induction. Tracheal intubation will be facilitated with rocuronium (0.6 mg/kg) or succinylcholine (1-2mg /kg). Anesthesia will be maintained with Sevoflurane or a Propofol infusion titrated to keep a bispectral index between 40-60, remifentanil infusion started at 0.1mcg/kg/min titrated to keep blood pressure within 20 % of baseline values, and rocuronium that will be administered at the discretion of the anesthesiologist. Upon termination of the surgery, neuromuscular blockade will be antagonized with a combination of neostigmine 0.05mg/kg and glycopyrrolate 0.01 mg/kg. Subjects will also receive Ketorolac 30 mg IV after discontinuation of remifentanil for postoperative pain control. Ondansetron 4 mg IV will be administered to decrease postoperative nausea and vomiting. Subjects will receive IV hydromorphone 0.4 mg q 5 minutes as needed to achieve a verbal rating score for pain <4 out of 10.They will also receive reglan 10 mg IV as a rescue antiemetic, if not effective, a second dose of Zofran 4 mg IV will be given in PACU. 24 hours after surgery a QOR 40 will be administered to the patient by one of the investigators. The primary and secondary outcomes will be assessed by an independent observer who will be blinded to group allocation.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind (participant, care provider, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Sevoflurane | Active comparator | Drug: SevofluraneSevoflurane administered by inhalation (laryngeal mask airway or endotracheal tube) |
| Propofol | Active comparator | Drug: PropofolPropofol administered via intravenous catheter at an initial rate of 1.0 -2.0 mg/kg then the Propofol infusion rate will be titrated to keep a bispectral index between 40-60 |
Who may qualify
- Ages
- 18 to 64 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- Women
- Age 18-64
- Patients undergoing ambulatory surgery
- ASA PS I, II
Key exclusion criteria (3 listed)
- Chronic opioid use
- Pregnant patient
- Drop Out : patient or surgeon request
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| SevofluraneAlso: Sevoflurane,UltaneSevfoflurane inhaled administered by laryngeal mask airway or endotracheal tube | Drug | Sevoflurane |
| PropofolAlso: Propofol,DiprivanPropofol administered via intravenous catheter at an initial rate of 1.0 -2.0 mg/kg then the Propofol infusion rate will be titrated to keep a bispectral index between 40-60 | Drug | Propofol |
Primary outcome
Quality of Recovery Score 24 Hours Post Operative
Time frame: 24 hours after the surgical procedure
Quality of recovery score 24 hours after the surgical procedure.Score of 40 is poor recovery and a score of 200 is good recovery.
3 secondary outcomes
Mg of Morphine Equivalents (IV)
Time frame: PACU admission to discharge
Pain in Post Anesthesia Care Unit
Time frame: Time in the post anesthesia care unit
Opioid Use Discharge From Post Anesthesia Care Unit to 24 Hours After PACU Discharge.
Time frame: Discharge from PACU to 24 hours post operative after PACU discharge.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Mar 2016.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 20010418White PF, Kehlet H. Improving postoperative pain management: what are the unresolved issues? Anesthesiology. 2010 Jan;112(1):220-5. doi: 10.1097/ALN.0b013e3181c6316e. No abstract available.
- Background: PubMed 16334489White PF. The changing role of non-opioid analgesic techniques in the management of postoperative pain. Anesth Analg. 2005 Nov;101(5 Suppl):S5-S22. doi: 10.1213/01.ANE.0000177099.28914.A7.
- Background: PubMed 10910869Zhang Y, Eger EI 2nd, Dutton RC, Sonner JM. Inhaled anesthetics have hyperalgesic effects at 0.1 minimum alveolar anesthetic concentration. Anesth Analg. 2000 Aug;91(2):462-6. doi: 10.1097/00000539-200008000-00044.
- Background: PubMed 11837149Hand R Jr, Riley GP, Nick ML, Shott S, Faut-Callahan M. The analgesic effects of subhypnotic doses of propofol in human volunteers with experimentally induced tourniquet pain. AANA J. 2001 Dec;69(6):466-70.
- Background: PubMed 18165589Cheng SS, Yeh J, Flood P. Anesthesia matters: patients anesthetized with propofol have less postoperative pain than those anesthetized with isoflurane. Anesth Analg. 2008 Jan;106(1):264-9, table of contents. doi: 10.1213/01.ane.0000287653.77372.d9.
- Background: PubMed 9818105Boccara G, Mann C, Pouzeratte Y, Bellavoir A, Rouvier A, Colson P. Improved postoperative analgesia with isoflurane than with propofol anaesthesia. Can J Anaesth. 1998 Sep;45(9):839-42. doi: 10.1007/BF03012216.
- Background: PubMed 11575532Visser K, Hassink EA, Bonsel GJ, Moen J, Kalkman CJ. Randomized controlled trial of total intravenous anesthesia with propofol versus inhalation anesthesia with isoflurane-nitrous oxide: postoperative nausea with vomiting and economic analysis. Anesthesiology. 2001 Sep;95(3):616-26. doi: 10.1097/00000542-200109000-00012.
- Background: PubMed 11064611Watson KR, Shah MV. Clinical comparison of 'single agent' anaesthesia with sevoflurane versus target controlled infusion of propofol. Br J Anaesth. 2000 Oct;85(4):541-6. doi: 10.1093/bja/85.4.541.
- Background: PubMed 16451145Rohm KD, Piper SN, Suttner S, Schuler S, Boldt J. Early recovery, cognitive function and costs of a desflurane inhalational vs. a total intravenous anaesthesia regimen in long-term surgery. Acta Anaesthesiol Scand. 2006 Jan;50(1):14-8. doi: 10.1111/j.1399-6576.2006.00905.x.
- Background: PubMed 12208434Montes FR, Trillos JE, Rincon IE, Giraldo JC, Rincon JD, Vanegas MV, Charris H. Comparison of total intravenous anesthesia and sevoflurane-fentanyl anesthesia for outpatient otorhinolaryngeal surgery. J Clin Anesth. 2002 Aug;14(5):324-8. doi: 10.1016/s0952-8180(02)00367-7.
- Background: PubMed 10740540Myles PS, Weitkamp B, Jones K, Melick J, Hensen S. Validity and reliability of a postoperative quality of recovery score: the QoR-40. Br J Anaesth. 2000 Jan;84(1):11-5. doi: 10.1093/oxfordjournals.bja.a013366.
- Derived from this study: PubMed 29032007De Oliveira GS Jr, Bialek J, Rodes ME, Kendall MC, McCarthy RJ. The effect of sevoflurane compared to propofol maintenance on post-surgical quality of recovery in patients undergoing an ambulatory gynecological surgery: A prospective, randomized, double-blinded, controlled, clinical trial. J Clin Anesth. 2017 Dec;43:70-74. doi: 10.1016/j.jclinane.2017.10.001. Epub 2017 Oct 13.
- Individual participant dataSharing planned: No
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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.
Gildasio De Oliveira, MD principal investigator
Northwestern University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Sevoflurane and Propofol in people with Surgery and Anesthesia, run by Northwestern University at 1 site in United States.
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 4 inclusion and 3 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 14 Mar 2016. 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 United States. 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.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 14 Mar 2016). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Quality of Recovery Score 24 Hours Post Operative (time frame: 24 hours after the surgical procedure). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01755234, which also lists 12 linked publications.
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 14 Mar 2016.