E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Analgesia for lower limb amputation for peripheral vascular disease (PVD) |
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E.1.1.1 | Medical condition in easily understood language |
Pain relief for lower leg amputation |
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E.1.1.2 | Therapeutic area | Analytical, Diagnostic and Therapeutic Techniques and Equipment [E] - Anesthesia and Analgesia [E03] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 19.1 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10042613 |
E.1.2 | Term | Surgical and medical procedures |
E.1.2 | System Organ Class | 10042613 - Surgical and medical procedures |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 19.1 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10021881 |
E.1.2 | Term | Infections and infestations |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 19.1 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10018065 |
E.1.2 | Term | General disorders and administration site conditions |
E.1.2 | System Organ Class | 10018065 - General disorders and administration site conditions |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 19.1 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10022117 |
E.1.2 | Term | Injury, poisoning and procedural complications |
E.1.2 | System Organ Class | 10022117 - Injury, poisoning and procedural complications |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
The principal research question is whether it is feasible to run a pragmatic randomised controlled trial to investigate the effect of a PNC use plus usual care compared to usual care alone on post-operative pain. |
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E.2.2 | Secondary objectives of the trial |
Secondary objectives include: • estimate an effect size for the difference in pain scores between groups for powering a future Randomised Clinical Trial (RCT) • identify barriers to patient recruitment and site set up • identify the proportion of eligible participants who consent to the study • identify the proportion of patients who supply primary outcome data • identify what frequency of pain score measurements, and using which tool, are most suited to identify pain in this cohort of patients • identify the proportion of patients reaching follow up to evaluate Phantom Limb Pain and Chronic Stump Pain levels • identify which secondary outcomes are important to include, and how best to assess them • identify important outcomes for patients and doctors (Core Outcome Sets: COS) for amputation research • develop a deeper understanding of overall patient experience relating to pain, and pain management • develop a suitable framework for a full health economic evaluation in a future RCT
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
The following patients are suitable for inclusion into the study: • patients aged 18 years or older • undergoing elective or emergency major lower limb amputations (BKA, or AKA) for complications of PVD • able to assess pain using a VRS • those with a life expectancy of greater than two weeks • (for women of childbearing potential) willing to undergo a pregnancy test before the trial and agree to either use a highly effective method of contraception or abstain from sexual intercourse until at least seven days after their amputation. |
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E.4 | Principal exclusion criteria |
The following patients are not suitable for inclusion into the study: • patients undergoing digital, metatarsal, tarsal amputation, disarticulation of the hip or hindquarter amputation • patients undergoing simultaneous bilateral amputations • patients undergoing through knee amputation (TKA) • patients who are unable to provide consent due to incapacity (as defined by Mental Capacity Act 2005) • vulnerable or protected adults • patients with an allergy or intolerance to any of the substances in the PNC, or local anaesthetic agents, or chronically taking class IB anti-arrhythmic agents or local anaesthetic agents, for example in the form of transdermal patches. • pregnant females • patients expected to be managed in the intensive care unit (ICU) postoperatively and be sedated for more than 24 hours • patients undergoing a subsequent amputation who have already been enrolled to participate in the PLACEMENT trial.
Patients who met the inclusion criteria but who subsequently are not suitable for randomisation include: • patients where a planned major amputation was not performed (due to either anaesthetic or surgical difficulties) • patients where a major amputation was performed but the appropriate nerve was not identified • patients who, due to instability in the intra-operative period, require admission to the ICU postoperatively and are most likely to be sedated for more than 24 hours • patients who, due to instability in the intra-operative period, are not expected to survive more than two weeks
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E.5 End points |
E.5.1 | Primary end point(s) |
Our primary outcome will be pain experienced over the first 5 postoperative days, as assessed using a Verbal Rating Scale with range 0 to 10, which will be captured 3 times a day. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
3 times per day for the first 5 days after operation for lower limb amputation. |
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E.5.2 | Secondary end point(s) |
Secondary outcomes are: • Pain assessed by the Overall Benefit of Analgesia Score (OBAS) pre-operatively and once daily post-operatively for five days. • Pain assessed by the Self-completed Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) pre-operatively and on post-operative day five. • Opioid use measured pre-operatively and once daily post-operatively for five days, converted to morphine equivalents using the University of Alberta Multidisciplinary Pain Centre Opioid Conversion Guide. • Pain assessed by S-LANSS and the Groningen PLP questionnaire at six week and six month follow-up. • Quality of life assessed pre-operatively and at 6 week and 6 month follow-up using EQ-5D and HADS. • Surgical site infection rates classified as per the 2008 CDC/NHSN document. • Rate of successful identification of the nerve and successful placement of the PNC (the latter in the intervention group only). • Assessment of resource usage during the first 6 months post-operatively.
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Various timepoints ranging from pre-operative, daily post-operative, at day 5 post-operative, 6 weeks and 6 months. |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | No |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
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E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 2 |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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The date of last data capture defines the end of the trial. This will be the date of the last data capture for the 6 month follow-up appointment with the last recruited subject. |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |