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Recruitment was slower than expected and study drug reached expiry
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The objective of the PAIN-STOP trial is to assess the feasibility of a larger randomized controlled trial (RCT) evaluating NMDA antagonists and IV steroids, as compared to placebo, in decreasing the chances of clinically significant persistent post-surgical pain (PPSP) after video assisted thoracoscopic surgeries (VATS). This is a multi-centre randomized, controlled clinical trial with a 2 x 2 factorial design. The pilot phase of the trial will recruit 48 patients and follow them for 3 months. Patients will be randomized to one of four groups: 1) NMDA active + Steroid placebo; 2) Steroid active + NMDA placebo; 3) NMDA active + Steroid active; 4) NMDA placebo + Steroid placebo.
Persistent Post-Surgical Pain (PPSP) after Video Assisted Thoracic Surgery (VATS) lobectomy procedures is an important health problem for which there is no effective method of prevention. NMDA antagonists and steroids can modify pain signaling-sensitization pathways, and inflammatory-immune pathways, and hence can potentially prevent the development of PPSP. These agents have been safely used in thoracic surgeries to obtain many perioperative benefits, without increasing the harmful effects. Since these agents act by different biological mechanisms, it is appropriate to study their effects in a factorial design to increase the trial efficiency. Before conducting a large multicenter trial, we propose to establish the feasibility by carrying out this feasibility trial.
The objective of the PAIN-STOP trial is to assess the feasibility of a larger randomized controlled trial (RCT) evaluating NMDA antagonists and IV steroids, as compared to placebo, in decreasing the chances of clinically significant persistent post-surgical pain (PPSP) after video assisted thoracoscopic surgeries (VATS). This is a multi-centre randomized, controlled clinical trial with a 2 x 2 factorial design. The pilot phase of the trial will recruit 48 patients and follow them for 3 months. Patients will be randomized to one of four groups: 1) NMDA active + Steroid placebo; 2) Steroid active + NMDA placebo; 3) NMDA active + Steroid active; 4) NMDA placebo + Steroid placebo. Follow-up visit will be conducted in hospital; day 8 and month 2 by a phone call; and in person follow-up visits at 30 days and 3 months post-randomization; for patients who cannot attend in person, a telephone follow up will be done.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| NMDA active + Steroid placebo | Experimental | NMDA active: ketamine (0.5 mg/kg IV bolus pre-incision and 0.1 mg/kg/hr infusion postoperatively up to 24 hours) and oral memantine (5 mg BID [first week]; 10 mg BID [following three weeks]). Steroid placebo: two doses of normal saline; 25 mg given prior to starting surgery and 25 mg given on the morning of second postoperative day. |
|
| Steroid active + NMDA placebo | Experimental | NMDA placebo: normal saline (IV bolus pre-incision and infusion postoperatively up to 24 hours) and oral matching placebo to memantine (one capsule BID [first week]; one capsule BID [following three weeks]). Steroid active: two doses of dexamethasone; 25 mg given prior to starting surgery and 25 mg given on the morning of second postoperative day. |
|
| NMDA active + Steroid active | Experimental | NMDA active: ketamine (0.5 mg/kg IV bolus pre-incision and 0.1 mg/kg/hr infusion postoperatively up to 24 hours) and oral memantine (5 mg BID [first week]; 10 mg BID [following three weeks]). Steroid active: two doses of dexamethasone; 25 mg given prior to starting surgery and 25 mg given on the morning of second postoperative day. |
|
| NMDA placebo + Steroid placebo | Placebo Comparator | NMDA placebo: normal saline (IV bolus pre-incision and infusion postoperatively up to 24 hours) and oral matching placebo to memantine (one capsule BID [first week]; one capsule BID [following three weeks]). Steroid placebo: two doses of normal saline; 25 mg given prior to starting surgery and 25 mg given on the morning of second postoperative day. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| NMDA active | Drug | NMDA active group will involve ketamine (0.5 mg/kg IV bolus pre-incision and 0.1 mg/kg/hr infusion postoperatively up to 24 hours) and oral memantine (5 mg BID [first week]; 10 mg BID [following three weeks]). |
| Measure | Description | Time Frame |
|---|---|---|
| Recruitment | Ability to recruit 90% of eligible patients. | 6 months |
| Recruitment | Ability to recruit at least 4 patients per month per site, and complete the recruitment over a 6-month period. | 6 months |
| Follow-up | Ability to obtain follow-up in >90% of enrolled patients, at three months. | 9 months |
| Measure | Description | Time Frame |
|---|---|---|
| NRS - Incidence of PPSP | Intensity of PPSP on a scale of 0-10, at 3 months after randomization [0-10 numerical rating scale (NRS) - where 0=no pain, 10=maximum pain]. | 3 months |
| NRS - Incidence of PPSP with movement evoked |
| Measure | Description | Time Frame |
|---|---|---|
| Incidence of myocardial infarction and injury | Incidence of myocardial infarction and myocardial injury after noncardiac surgery (MINS) | 3 months |
| Incidence of postoperative pneumonia | Incidence of postoperative pneumonia |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| PJ Devereaux, MD, PhD | McMaster University | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Cleveland Clinic | Cleveland | Ohio | 44106 | United States | ||
| St. Joseph's Healthcare |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 32104059 | Derived | Shanthanna H, Turan A, Vincent J, Saab R, Shargall Y, O'Hare T, Davis K, Fonguh S, Balasubramaniam K, Paul J, Gilron I, Kehlet H, Sessler DI, Bhandari M, Thabane L, Devereaux PJ. N-Methyl-D-Aspartate Antagonists and Steroids for the Prevention of Persisting Post-Surgical Pain After Thoracoscopic Surgeries: A Randomized Controlled, Factorial Design, International, Multicenter Pilot Trial. J Pain Res. 2020 Feb 12;13:377-387. doi: 10.2147/JPR.S237058. eCollection 2020. |
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| ID | Term |
|---|---|
| D010149 | Pain, Postoperative |
| ID | Term |
|---|---|
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D010146 | Pain |
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We will randomize patients in a 1:1:1:1 fashion to receive; 1) NMDA active + dexamethasone placebo, 2) dexamethasone active + NMDA placebo, 3) NMDA active + dexamethasone active, and 4) NMDA placebo + dexamethasone placebo.
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Patients, health care providers, data collectors, outcome adjudicators, and Investigators (e.g., Steering Committee Members) will all be blind to treatment allocation.
|
| Steroid active | Drug | Steroid active group will involve two doses of dexamethasone; 25 mg given prior to starting surgery and 25 mg given on the morning of second postoperative day. |
|
| NMDA placebo | Drug | NMDA active group will involve normal saline (IV bolus pre-incision and infusion postoperatively up to 24 hours) and oral matching placebo to memantine (1 capsule BID [first week]; 1 capsule BID [following three weeks]). |
|
| Steroid placebo | Drug | Steroid placebo group will involve two doses of normal saline; one dose given prior to starting surgery and one dose given on the morning of second postoperative day. |
|
Incidence of PPSP (in and/or around the surgical scar) at 3 months after randomization, as the presence of movement evoked pain > 3/10 in 0-10 NRS.
| 3 months |
| Rate of change of postoperative pain intensity | The rate of change of postoperative pain intensity measured over time (pain trajectory). | 3 months |
| Use of narcotic analgesic medication | Use of narcotic analgesic medication > 3 days/week beyond 4 weeks and up to 3 months after randomization. | 3 months |
| Presence of NP | Presence of NP as > 3 out 7 items using DN4 scale, at measured at 3 months after randomization. | 3 months |
| BPI score | Difference in interference with activities of daily living measured using Brief Pain Inventory interference score, measured at 3 months after randomization. | 3 months |
| Thoracic surgery specific activity limitations | Difference in thoracic surgery specific activity limitations, measured at 3 months after randomization. | 3 months |
| Change in global health status | Change in global health status measured using global impression of change (GIC) scale at 3 months after randomization. | 3 months |
| Difference in Quality of Life | Difference in Quality of Life (QoL) using European Organization for Research and Treatment of Cancer (EORTC) QoL-30 at 3 months after randomization. | 3 months |
| 3 months |
| Incidence of prolonged air-leak | Incidence of prolonged air-leak | 3 months |
| Incidence of new intubation and positive pressure ventilation | Incidence of new intubation and positive pressure ventilation | 3 months |
| Incidence of surgical site infection | Incidence of surgical site infection | 3 months |
| Hamilton |
| Ontario |
| L8N4A6 |
| Canada |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |