Neoplasm of LungESCAVNCT04665531
Postoperative Analgesia With a Catheter Under the Erector Spinae Muscle for Videothoracoscopic Lung Surgery
A study testing Erector Spinae Catheter, Intercostal block and Ropivacaine 0.2% Injectable Solution in people with Neoplasm of Lung and Thoracic Surgery, Video-Assisted, run by Surgery Bitenc at 1 site in Slovenia.
Trial summary
The purpose of the research is to prove the analgesic efficacy of a novel technique in regional anaesthesia, i.e. the catheter under the erector spinae muscle (ESC). Investigators will evaluate the use of the ESC for analgesia after video-assisted thoracoscopic lung surgeries in comparison to the standard method of… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Neoplasm of Lung, Thoracic Surgery, Video-Assisted
- What is being tested?
- Erector Spinae Catheter, Intercostal block and Ropivacaine 0.2% Injectable Solution
- Type of treatment
- Pill or oral medicine, Injection or infusion, Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- 1 siteSlovenia
- Study dates
- 19 Feb 2020to 14 Jun 2022
- Phase
- Interventional
- 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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Signed written informed consent
- ASA (American Society of Anesthesiologists status) I-III
- Elective video-assisted thoracic surgery - lobectomy with 3 ports technique
- No contraindications for regional anesthesia
Who cannot join
- Allergy to local anesthetic
- Pregnancy, breastfeeding
- BMI>35
- Inflammation in the area of ES catheter insertion
- Inability to use the PCA pump
- Inability to execute the main inspiratory and expiratory pressure measurements
Trial locations and contacts
1 site in 1 country.
About this study
The purpose of the research is to prove the analgesic efficacy of a novel technique in regional anaesthesia, i.e. the catheter under the erector spinae muscle (ESC). Investigators will evaluate the use of the ESC for analgesia after video-assisted thoracoscopic lung surgeries in comparison to the standard method of post-operative analgesia, which is the multiple level intercostal block given at the end of surgery by the surgeon. Investigators will compare the amount of opioid analgesics required by the patient using the patient controlled pump, the pain status in 48-hours after surgery and compare the differences between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
- Conditions
- Neoplasm of Lung, Thoracic Surgery, Video-Assisted
- Being tested
- Erector Spinae Catheter, Intercostal block, Ropivacaine 0.2% Injectable Solution
- Keywords
- Anesthesia, Conduction, Regional Anesthesia, Post-operative Analgesia
- Medical subject headings
- Lung Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Erector Spinae CatheterProcedure or surgery
Also called continuous regional analgesia
Patients in the experimental group will receive the Erector Spinae Catheter with an initial bolus ob 20ml 0,5% levobupivacaine prior the surgery and will be administered local anesthetics for 48 hours post-operatively.
Intercostal blockProcedure or surgery
Also called Single shot regional analgesia
Patients in the comparative group will receive standard treatment, i.e. the multi-level intercostal block with 20ml 0,5% levobupivacaine administered at the end of the surgery by the surgeon.
Ropivacaine 0.2% Injectable SolutionDrug
Patients in the experimental group will receive Ropivacaine 0,2% continous infusion of 5ml/h with boluses 15ml/4h by the Erector Spinae Catheter for 48 hours post-operatively.
| Study group | Role | What they receive |
|---|---|---|
| Group A - Erector Spinae Catheter group | Experimental | Patients in the experimental group will receive the erector spinae catheter prior the surgery and will be administered local anesthetics for 48 hours post-operatively.
Anesthetic regimen: initial bolus of 20ml 0.5% levobupivacaine before the end of surgery. Then continually ropivacaine 0,2% 5ml/h with intermittent boluses 15ml ropivacaine 0,2% every 4h.
Both groups will receive multimodal analgetic treatment consisting of a patient-controlled (PCA) pump with opioid analgetics and a peripherally acting analgetic metamizol on a regular basis. The PCA pump will be set to intermittent boluses of 3mg piritramide with a lock-out time 15 min and a maximal number of 6 boluses /3 hours. Patients will receive metamizol 2,5g/12hours i.v. on the day of surgery and 500-1000mg / 6 hours orally on the first and second post-operative day. Receives: Procedure: Erector Spinae Catheter; Drug: Ropivacaine 0.2% Injectable Solution |
| Group B - Intercostal block | Active comparator | Patients will receive standard treatment, i.e. the multi-level intercostal block administered at the end of the surgery by the surgeon. They will receive 20ml 0,5% levobupivacaine on 6 levels of the thoracic wall according to the operative wound level.
Both groups will receive multimodal analgetic treatment consisting of a patient-controlled (PCA) pump with opioid analgetics and a peripherally acting analgetic metamizol on a regular basis. The PCA pump will be set to intermittent boluses of 3mg piritramide with a lock-out time 15 min and a maximal number of 6 boluses /3 hours. Patients will receive metamizol 2,5g/12hours i.v. on the day of surgery and 500-1000mg / 6 hours orally on the first and second post-operative day. Receives: Procedure: Intercostal block |
What is being measured
The primary outcome is the main question the study is designed to answer.
Demand for opioid analgetics
Investigators will measure the total consumption of i.v. piritramide after surgery given by the PCA (patient-controlled analgesia) pump. The PCA pump automatically marks all the drug consumption. The PCA pump will be set to a uniform protocol: piritramide 1mg/ml; flow 0ml/h, bolus 3ml, lockout time 15 min, max 4 boluses / hour.
Measured: Continually 48 hours after surgery
Difference in pre- and post-operative respiratory muscle fitness
Investigators will compare the change between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
Measured: First postoperative day
Difference in pre- and post-operative respiratory muscle fitness
Investigators will compare the change between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
Measured: Second postoperative day
Secondary outcomes (1)
Subjective pain score
Investigators will measure subjective perception of pain with the nubmering rating score (NRS) scoring system at resting and coughing. The NRS scoring system is a numerical scale from 0-10, with 0 being no pain and 10 the strongest pain imaginable. Patients will assess their pain with the help of analogue scale with colours and faces by each number representing different NRS pain levels.
Measured: Every hour in the 48 hours post surgery.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Dec 2020
- Study start19 Feb 2020
- Primary completion14 Mar 2022
- Study completion14 Jun 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Neoplasm of LungStudies of the same condition, open and under way.
- 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 N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Prospective, randomised, controlled
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 50 participants (actual)
Sponsor and investigators
- Lead sponsor
- Surgery Bitenc
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Polona Gams, Principal investigator, Surgery Bitenc
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04665531
- Sponsor's protocol ID
- 0120- 372/2019A
- Acronym
- ESCAV
- Status last verified
- Jul 2022
- First submitted
- 11 Nov 2020
- Last updated
- 19 Jul 2022
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Rawal N. Current issues in postoperative pain management. Eur J Anaesthesiol. 2016 Mar;33(3):160-71. doi: 10.1097/EJA.0000000000000366.
PubMed 26509324Benyamin R, Trescot AM, Datta S, Buenaventura R, Adlaka R, Sehgal N, Glaser SE, Vallejo R. Opioid complications and side effects. Pain Physician. 2008 Mar;11(2 Suppl):S105-20.
PubMed 18443635Beverly A, Kaye AD, Ljungqvist O, Urman RD. Essential Elements of Multimodal Analgesia in Enhanced Recovery After Surgery (ERAS) Guidelines. Anesthesiol Clin. 2017 Jun;35(2):e115-e143. doi: 10.1016/j.anclin.2017.01.018.
PubMed 28526156Batchelor TJP, Rasburn NJ, Abdelnour-Berchtold E, Brunelli A, Cerfolio RJ, Gonzalez M, Ljungqvist O, Petersen RH, Popescu WM, Slinger PD, Naidu B. Guidelines for enhanced recovery after lung surgery: recommendations of the Enhanced Recovery After Surgery (ERAS(R)) Society and the European Society of Thoracic Surgeons (ESTS). Eur J Cardiothorac Surg. 2019 Jan 1;55(1):91-115. doi: 10.1093/ejcts/ezy301.
PubMed 30304509Bialka S, Copik M, Daszkiewicz A, Rivas E, Ruetzler K, Szarpak L, Misiolek H. Comparison of different methods of postoperative analgesia after thoracotomy-a randomized controlled trial. J Thorac Dis. 2018 Aug;10(8):4874-4882. doi: 10.21037/jtd.2018.07.88.
PubMed 30233861Ahmed Z, Samad K, Ullah H. Role of intercostal nerve block in reducing postoperative pain following video-assisted thoracoscopy: A randomized controlled trial. Saudi J Anaesth. 2017 Jan-Mar;11(1):54-57. doi: 10.4103/1658-354X.197342.
PubMed 28217054D'Ercole F, Arora H, Kumar PA. Paravertebral Block for Thoracic Surgery. J Cardiothorac Vasc Anesth. 2018 Apr;32(2):915-927. doi: 10.1053/j.jvca.2017.10.003. Epub 2017 Oct 4.
PubMed 29169795Ilfeld BM, Gabriel RA. Basal infusion versus intermittent boluses for perineural catheters: should we take the 'continuous' out of 'continuous peripheral nerve blocks'? Reg Anesth Pain Med. 2019 Mar;44(3):285-286. doi: 10.1136/rapm-2018-100262. Epub 2019 Jan 13. No abstract available.
PubMed 30636717Kamiyoshihara M, Nagashima T, Ibe T, Atsumi J, Shimizu K, Takeyoshi I. Is epidural analgesia necessary after video-assisted thoracoscopic lobectomy? Asian Cardiovasc Thorac Ann. 2010 Oct;18(5):464-8. doi: 10.1177/0218492310381817.
PubMed 20947601Krebs ED, Mehaffey JH, Sarosiek BM, Blank RS, Lau CL, Martin LW. Is less really more? Reexamining video-assisted thoracoscopic versus open lobectomy in the setting of an enhanced recovery protocol. J Thorac Cardiovasc Surg. 2020 Jan;159(1):284-294.e1. doi: 10.1016/j.jtcvs.2019.08.036. Epub 2019 Sep 13.
PubMed 31610965Adhikary SD, Pruett A, Forero M, Thiruvenkatarajan V. Erector spinae plane block as an alternative to epidural analgesia for post-operative analgesia following video-assisted thoracoscopic surgery: A case study and a literature review on the spread of local anaesthetic in the erector spinae plane. Indian J Anaesth. 2018 Jan;62(1):75-78. doi: 10.4103/ija.IJA_693_17.
PubMed 29416155Hong B, Bang S, Chung W, Yoo S, Chung J, Kim S. Multimodal analgesia with multiple intermittent doses of erector spinae plane block through a catheter after total mastectomy: a retrospective observational study. Korean J Pain. 2019 Jul 1;32(3):206-214. doi: 10.3344/kjp.2019.32.3.206.
PubMed 31257829
Study at a glance
From the registry record, last updated by the sponsor on 19 Jul 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Postoperative Analgesia With a Catheter Under the Erector Spinae Muscle for Videothoracoscopic Lung Surgery
- ClinicalTrials.gov ID
- NCT04665531
- Acronym / sponsor ID
- ESCAV / 0120- 372/2019A
- Conditions
- Neoplasm of Lung, Thoracic Surgery, Video-Assisted
- Keywords
- Anesthesia, Conduction, Regional Anesthesia, Post-operative Analgesia
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 50 participants (actual)
- Lead sponsor
- Surgery BitencUniversity, hospital or other
- Study start
- 19 Feb 2020 (actual)
- Primary completion
- 14 Mar 2022 (actual)
- Study completion
- 14 Jun 2022 (actual)
- First posted
- 11 Dec 2020 (actual)
- 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 purpose of the research is to prove the analgesic efficacy of a novel technique in regional anaesthesia, i.e. the catheter under the erector spinae muscle (ESC). Investigators will evaluate the use of the ESC for analgesia after video-assisted thoracoscopic lung surgeries in comparison to the standard method of post-operative analgesia, which is the multiple level intercostal block given at the end of surgery by the surgeon. Investigators will compare the amount of opioid analgesics required by the patient using the patient controlled pump, the pain status in 48-hours after surgery and compare the differences between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
- Model description
- Prospective, randomised, controlled
| Arm | Type | Receives |
|---|---|---|
| Group A - Erector Spinae Catheter group | Experimental | Procedure: Erector Spinae Catheter, Drug: Ropivacaine 0.2% Injectable SolutionPatients in the experimental group will receive the erector spinae catheter prior the surgery and will be administered local anesthetics for 48 hours post-operatively. Anesthetic regimen: initial bolus of 20ml 0.5% levobupivacaine before the end of surgery. Then continually ropivacaine 0,2% 5ml/h with intermittent boluses 15ml ropivacaine 0,2% every 4h. Both groups will receive multimodal analgetic treatment consisting of a patient-controlled (PCA) pump with opioid analgetics and a peripherally acting analgetic metamizol on a regular basis. The PCA pump will be set to intermittent boluses of 3mg piritramide with a lock-out time 15 min and a maximal number of 6 boluses /3 hours. Patients will receive metamizol 2,5g/12hours i.v. on the day of surgery and 500-1000mg / 6 hours orally on the first and second post-operative day. |
| Group B - Intercostal block | Active comparator | Procedure: Intercostal blockPatients will receive standard treatment, i.e. the multi-level intercostal block administered at the end of the surgery by the surgeon. They will receive 20ml 0,5% levobupivacaine on 6 levels of the thoracic wall according to the operative wound level. Both groups will receive multimodal analgetic treatment consisting of a patient-controlled (PCA) pump with opioid analgetics and a peripherally acting analgetic metamizol on a regular basis. The PCA pump will be set to intermittent boluses of 3mg piritramide with a lock-out time 15 min and a maximal number of 6 boluses /3 hours. Patients will receive metamizol 2,5g/12hours i.v. on the day of surgery and 500-1000mg / 6 hours orally on the first and second post-operative day. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Signed written informed consent
- ASA (American Society of Anesthesiologists status) I-III
- Elective video-assisted thoracic surgery - lobectomy with 3 ports technique
- No contraindications for regional anesthesia
Key exclusion criteria (6 listed)
- Allergy to local anesthetic
- Pregnancy, breastfeeding
- BMI>35
- Inflammation in the area of ES catheter insertion
- Inability to use the PCA pump
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 |
|---|---|---|
| Erector Spinae CatheterAlso: continuous regional analgesiaPatients in the experimental group will receive the Erector Spinae Catheter with an initial bolus ob 20ml 0,5% levobupivacaine prior the surgery and will be administered local anesthetics for 48 hours post-operatively. | Procedure or surgery | Group A - Erector Spinae Catheter group |
| Intercostal blockAlso: Single shot regional analgesiaPatients in the comparative group will receive standard treatment, i.e. the multi-level intercostal block with 20ml 0,5% levobupivacaine administered at the end of the surgery by the surgeon. | Procedure or surgery | Group B - Intercostal block |
| Ropivacaine 0.2% Injectable SolutionPatients in the experimental group will receive Ropivacaine 0,2% continous infusion of 5ml/h with boluses 15ml/4h by the Erector Spinae Catheter for 48 hours post-operatively. | Drug | Group A - Erector Spinae Catheter group |
Primary outcome
Demand for opioid analgetics
Time frame: Continually 48 hours after surgery
Investigators will measure the total consumption of i.v. piritramide after surgery given by the PCA (patient-controlled analgesia) pump. The PCA pump automatically marks all the drug consumption. The PCA pump will be set to a uniform protocol: piritramide 1mg/ml; flow 0ml/h, bolus 3ml, lockout time 15 min, max 4 boluses / hour.
Difference in pre- and post-operative respiratory muscle fitness
Time frame: First postoperative day
Investigators will compare the change between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
Difference in pre- and post-operative respiratory muscle fitness
Time frame: Second postoperative day
Investigators will compare the change between pre- and post-operative main inspiratory pressure and main expiratory pressure measurements between the two research groups.
1 secondary outcome
Subjective pain score
Time frame: Every hour in the 48 hours post surgery.
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 19 Jul 2022.
- Background: PubMed 26509324Rawal N. Current issues in postoperative pain management. Eur J Anaesthesiol. 2016 Mar;33(3):160-71. doi: 10.1097/EJA.0000000000000366.
- Background: PubMed 18443635Benyamin R, Trescot AM, Datta S, Buenaventura R, Adlaka R, Sehgal N, Glaser SE, Vallejo R. Opioid complications and side effects. Pain Physician. 2008 Mar;11(2 Suppl):S105-20.
- Background: PubMed 28526156Beverly A, Kaye AD, Ljungqvist O, Urman RD. Essential Elements of Multimodal Analgesia in Enhanced Recovery After Surgery (ERAS) Guidelines. Anesthesiol Clin. 2017 Jun;35(2):e115-e143. doi: 10.1016/j.anclin.2017.01.018.
- Background: PubMed 30304509Batchelor TJP, Rasburn NJ, Abdelnour-Berchtold E, Brunelli A, Cerfolio RJ, Gonzalez M, Ljungqvist O, Petersen RH, Popescu WM, Slinger PD, Naidu B. Guidelines for enhanced recovery after lung surgery: recommendations of the Enhanced Recovery After Surgery (ERAS(R)) Society and the European Society of Thoracic Surgeons (ESTS). Eur J Cardiothorac Surg. 2019 Jan 1;55(1):91-115. doi: 10.1093/ejcts/ezy301.
- Background: PubMed 30233861Bialka S, Copik M, Daszkiewicz A, Rivas E, Ruetzler K, Szarpak L, Misiolek H. Comparison of different methods of postoperative analgesia after thoracotomy-a randomized controlled trial. J Thorac Dis. 2018 Aug;10(8):4874-4882. doi: 10.21037/jtd.2018.07.88.
- Background: PubMed 28217054Ahmed Z, Samad K, Ullah H. Role of intercostal nerve block in reducing postoperative pain following video-assisted thoracoscopy: A randomized controlled trial. Saudi J Anaesth. 2017 Jan-Mar;11(1):54-57. doi: 10.4103/1658-354X.197342.
- Background: PubMed 29169795D'Ercole F, Arora H, Kumar PA. Paravertebral Block for Thoracic Surgery. J Cardiothorac Vasc Anesth. 2018 Apr;32(2):915-927. doi: 10.1053/j.jvca.2017.10.003. Epub 2017 Oct 4.
- Background: PubMed 30636717Ilfeld BM, Gabriel RA. Basal infusion versus intermittent boluses for perineural catheters: should we take the 'continuous' out of 'continuous peripheral nerve blocks'? Reg Anesth Pain Med. 2019 Mar;44(3):285-286. doi: 10.1136/rapm-2018-100262. Epub 2019 Jan 13. No abstract available.
- Background: PubMed 20947601Kamiyoshihara M, Nagashima T, Ibe T, Atsumi J, Shimizu K, Takeyoshi I. Is epidural analgesia necessary after video-assisted thoracoscopic lobectomy? Asian Cardiovasc Thorac Ann. 2010 Oct;18(5):464-8. doi: 10.1177/0218492310381817.
- Background: PubMed 31610965Krebs ED, Mehaffey JH, Sarosiek BM, Blank RS, Lau CL, Martin LW. Is less really more? Reexamining video-assisted thoracoscopic versus open lobectomy in the setting of an enhanced recovery protocol. J Thorac Cardiovasc Surg. 2020 Jan;159(1):284-294.e1. doi: 10.1016/j.jtcvs.2019.08.036. Epub 2019 Sep 13.
- Background: PubMed 29416155Adhikary SD, Pruett A, Forero M, Thiruvenkatarajan V. Erector spinae plane block as an alternative to epidural analgesia for post-operative analgesia following video-assisted thoracoscopic surgery: A case study and a literature review on the spread of local anaesthetic in the erector spinae plane. Indian J Anaesth. 2018 Jan;62(1):75-78. doi: 10.4103/ija.IJA_693_17.
- Background: PubMed 31257829Hong B, Bang S, Chung W, Yoo S, Chung J, Kim S. Multimodal analgesia with multiple intermittent doses of erector spinae plane block through a catheter after total mastectomy: a retrospective observational study. Korean J Pain. 2019 Jul 1;32(3):206-214. doi: 10.3344/kjp.2019.32.3.206.
- 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.
Polona Gams principal investigator
Surgery Bitenc
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Erector Spinae Catheter, Intercostal block and Ropivacaine 0.2% Injectable Solution in people with Neoplasm of Lung and Thoracic Surgery, Video-Assisted, run by Surgery Bitenc at 1 site in Slovenia.
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 6 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 19 Jul 2022. 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 Slovenia. 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?
Demand for opioid analgetics (time frame: Continually 48 hours after surgery). The study lists 3 primary outcomes in all. 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 NCT04665531, 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 19 Jul 2022.