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Performance and Safety of the ANTALGEEK® Thess Monitoring Medical Device in the Outpatient Management of Acute Pain and Postoperative Recovery

Evaluation of the Performance and Safety of the ANTALGEEK® Thess Monitoring Medical Device in the Outpatient Management of Acute Pain and Postoperative Recovery - A Single-Center, Randomized, Controlled Proof-of-Concept Study.

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07680998
Acronym
TRACE
Enrollment
150
Registered
2026-07-02
Start date
2025-12-01
Completion date
2026-12-31
Last updated
2026-07-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Pain, Post Operative Pain

Keywords

Post Operative Pain, Pain Management, Monitoring

Brief summary

Acute postoperative pain (APOP) is a major public health problem, affecting nearly 10 million patients in France each year. Effective analgesic therapy in the first postoperative week is a key factor in reducing early postoperative morbidity and mortality. Poorly controlled APOP is a major risk factor for chronic postoperative pain. In France today, more and more patients undergo surgical procedures as outpatients. The challenge is to manage postoperative pain in the homes of patients who have undergone increasingly complex surgical procedures, either after outpatient surgery or after a prompt return home as part of an Enhanced Recovery After Surgery (ERAS) protocol. In outpatient surgery, postoperative pain management requires new strategies and/or organizational approaches to ensure high-quality pain management from the very start. The principle of analgesia for acute postoperative pain recommends: i) routine, fixed-schedule maintenance therapy; and ii) rescue therapy if maintenance therapy is insufficient, based on pain titration, using mild or strong oral opioids. Postoperative pain is the primary focus of postoperative care but the goal is also to improve postoperative recovery and enhance the patient's overall care. To date, there are no medical telemonitoring devices to support the patient in properly taking their analgesics based on multiple-daily assessments of the efficacy and tolerability of the analgesic treatment, enabling systematic postoperative screening for early and late warning signs of the risk of chronic pain. The Thess Monitoring device, which implements the ANTALGEEK® protocol, (TMA) was developed to optimize the efficiency of outpatient management of acute postoperative pain. It improves patients' adherence to maintenance treatment with adaptive, personalized control of analgesia through better use of opioid rescue therapy, and the reduction of adverse effects associated with improper opioid use (under- or over-dosing). The aim is to ensure optimal pain resolution and improve early and late postoperative recovery during the first postoperative week. The TMA system enables remote monitoring of the efficacy and tolerability of analgesic treatment, as well as early and late warning signs of the risk of chronic pain. By measuring pain scores daily during the first postoperative week, it identifies patients with a suboptimal pain trajectory who are at high risk of developing persistent pain beyond the third month. It also assesses warning signs of the risk of chronic pain (neuropathic pain, persistent opioid use) at intervals following the procedure (Day 8, Month 1, Month 2, Month 3). Improving the patient care pathway via the TMA system should make it possible to better coordinate postoperative follow-up between hospital-based and community-based care.

Detailed description

The problem of acute postoperative pain (APOP) is a major public health problem, affecting nearly 10 million patients in France each year and potentially leading to numerous complications when inadequately managed. In the postoperative period, the implementation of effective analgesic therapy is a key factor in reducing early postoperative morbidity and mortality. Furthermore, poorly controlled PPS is one of the major risk factors for the development of chronic postoperative pain (CPOP). Optimizing analgesic medication to prevent an abnormal pain trajectory during the first postoperative week is a key strategy for preventing chronic postoperative pain. Today, within the French healthcare system, an increasing number of patients undergo surgical procedures performed on an outpatient basis. The big challenge is to manage postoperative pain in the homes of patients who have undergone increasingly complex surgical procedures, either following outpatient surgery or after an early return home as part of an Enhanced Recovery After Surgery (ERAS) protocol. In outpatient surgery, improving postoperative pain management requires the implementation of new strategies and/or organizational approaches to ensure a high-quality pain management pathway from the very beginning. The principle of analgesia for acute postoperative pain recommends a combination of: i) routine, fixed-schedule maintenance therapy; and ii) rescue therapy-if maintenance therapy is insufficient-based on the principle of pain titration, using oral opioids (mild or strong). While postoperative pain remains the primary focus of postoperative care, the goal is also to improve postoperative recovery more broadly and thereby enhance the patient's overall care. The assessment of postoperative recovery in outpatient surgery patients using a medical telemonitoring device is associated with a reduction in discomfort caused by various postoperative symptoms, including postoperative pain. However, to date, there is no medical telemonitoring device that both supports the patient in properly taking their analgesics based on multiple-daily assessments of the efficacy and tolerability of the analgesic treatment, and enables systematic postoperative screening for early and late warning signs of the risk of chronic pain. To this end, the Thess Monitoring medical telemonitoring device (which implements the ANTALGEEK® protocol) (TMA) was developed. It is a tool for continuous therapeutic support and postoperative telemonitoring designed to optimize the efficiency of outpatient management of acute postoperative pain in patients by improving adherence to maintenance therapy, adaptive and personalized control of analgesia through better use of opioid rescue therapy, and the reduction of adverse effects associated with improper opioid use (under- or over-dosing), with the goal of ensuring optimal pain resolution and improved early and late postoperative recovery during the first postoperative week (Baseline-Day 7). To achieve this, the TMA system enables remote monitoring of the efficacy and tolerability of analgesic treatment, as well as early and late warning signs of the risk of chronic pain: identify, through daily measurement of pain scores during the first postoperative week, patients with a suboptimal pain trajectory who are at high risk of developing persistent postoperative pain beyond the third month; assess warning signs of the risk of chronic pain (neuropathic pain, persistent opioid use) at intervals following the procedure (Day 8, Month 1, Month 2, Month 3). Improving the patient care pathway through the TMA system should thus make it possible to better coordinate postoperative follow-up between hospital-based and community-based care. In this initial proof-of-concept study, the investigators aim to evaluate the performance and safety of the TMA medical device in the outpatient management of acute pain during the first postoperative week, as well as its impact on postoperative recovery and on reducing the risk of pain becoming chronic by the third postoperative month.

Interventions

DEVICEPost-operative follow-up using the Thess Telemonitoring device in conjunction with the ANTALGEEK® protocol

The Thess monitoring medical device (Thess Corp., Montpellier) uses the remote ANTALGEEK® telemonitoring protocol to manage pain in outpatients who have had surgery causing moderate-to-severe pain. It digitalizes and optimizes acute postoperative pain management at home by improving adherence to maintenance therapy, with adaptive, tailored control of analgesia through better use of opioid rescue therapy to reduce the adverse effects of opioid misuse and ensures optimal pain resolution and postoperative recovery during the first week. The ANTALGEEK decision-making algorithm and a medical telemonitoring protocol help patients follow their pain medication regimen, monitoring them in postoperative Week 1, based on the preoperative prescription, data on the patient's adherence to treatment, its efficacy and tolerability.

Sponsors

Centre Hospitalier Universitaire de Nīmes
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SUPPORTIVE_CARE
Masking
NONE

Masking description

None (open-label).

Intervention model description

A prospective, single-center, randomized controlled trial (1:1 ratio) conducted as an open-label study comparing two management approaches: postoperative pain monitoring using the Thess Monitoring medical telemonitoring device in combination with the ANTALGEEK® protocol (experimental group) versus standard of care (control group).

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patients eligible for outpatient surgery. * Patients undergoing surgery likely to result in moderate to severe pain. * Patients available for a 3-month follow-up. * Patients who have provided their free and informed consent. * Patients who have signed the consent form. * Patients enrolled in or covered by a health insurance plan.

Exclusion criteria

* Patients participating in an interventional RIPH study involving a drug or classified as Category 1. * Patients in an exclusion period determined by another study. * Patients under judicial protection, guardianship, or conservatorship. * Patients unable to express consent. * Patient for whom it is impossible to provide informed information. * Pregnant, laboring, or breastfeeding patients.

Design outcomes

Primary

MeasureTime frameDescription
Performance of the TMA® medical device (TMA group) according to the QoR-15 questionnaire score in the experimental groupDay 2The QoR-15 (quality of recovery) questionnaire comprises 15 items assessing different aspects of a patient's recovery : symptoms, functional status, and emotional well-being. The 15 items are grouped into five domains: Physical Comfort (symptoms like nausea, vomiting, and general discomfort), Emotional State (feelings such as anxiety, depression, or general well-being), Physical Independence (the patient's ability to look after themselves, such as mobility and self-care), Psychological Support (feelings of support and reassurance) Pain (the level of pain experienced by the patient). Each item in the QoR-15 is scored on an 11-point numerical scale ranging from 0 (none of the time/worst outcome) to 10 (all of the time/best outcome). The sum of the scores for each of the 15 items results in a score ranging from 0 (very poor recovery) to 150 (excellent quality of recovery). Excellent: QoR-15 score \> 135, Good: QoR-15 score between 122 and 135 (inclusive), Moderate: QoR-15 score between 90
Performance of the TMA® medical device (TMA group) according to the QoR-15 questionnaire score in the standard care (control) group.Day 2The QoR-15 (quality of recovery) questionnaire comprises 15 items assessing different aspects of a patient's recovery : symptoms, functional status, and emotional well-being. The 15 items are grouped into five domains: Physical Comfort (symptoms like nausea, vomiting, and general discomfort), Emotional State (feelings such as anxiety, depression, or general well-being), Physical Independence (the patient's ability to look after themselves, such as mobility and self-care), Psychological Support (feelings of support and reassurance) Pain (the level of pain experienced by the patient). Each item in the QoR-15 is scored on an 11-point numerical scale ranging from 0 (none of the time/worst outcome) to 10 (all of the time/best outcome). The sum of the scores for each of the 15 items results in a score ranging from 0 (very poor recovery) to 150 (excellent quality of recovery). Excellent: QoR-15 score \> 135, Good: QoR-15 score between 122 and 135 (inclusive), Moderate: QoR-15 score between 90

Secondary

MeasureTime frameDescription
Quality of postoperative recovery (QoR15) during the early and late phases of recovery in the experimental groupDay 1, before the interventionThe QoR-15 (quality of recovery) questionnaire comprises 15 items assessing different aspects of a patient's recovery : symptoms, functional status, and emotional well-being. The 15 items are grouped into five domains: Physical Comfort (symptoms like nausea, vomiting, and general discomfort), Emotional State (feelings such as anxiety, depression, or general well-being), Physical Independence (the patient's ability to look after themselves, such as mobility and self-care), Psychological Support (feelings of support and reassurance) Pain (the level of pain experienced by the patient). Each item in the QoR-15 is scored on an 11-point numerical scale ranging from 0 (none of the time/worst outcome) to 10 (all of the time/best outcome). The sum of the scores for each of the 15 items results in a score ranging from 0 (very poor recovery) to 150 (excellent quality of recovery). Excellent: QoR-15 score \> 135, Good: QoR-15 score between 122 and 135 (inclusive), Moderate: QoR-15 score between 90
Quality of postoperative recovery (QoR15) during the early and late phases of recovery in the standard care (control) groupDay 1, before the interventionThe QoR-15 (quality of recovery) questionnaire comprises 15 items assessing different aspects of a patient's recovery : symptoms, functional status, and emotional well-being. The 15 items are grouped into five domains: Physical Comfort (symptoms like nausea, vomiting, and general discomfort), Emotional State (feelings such as anxiety, depression, or general well-being), Physical Independence (the patient's ability to look after themselves, such as mobility and self-care), Psychological Support (feelings of support and reassurance) Pain (the level of pain experienced by the patient). Each item in the QoR-15 is scored on an 11-point numerical scale ranging from 0 (none of the time/worst outcome) to 10 (all of the time/best outcome). The sum of the scores for each of the 15 items results in a score ranging from 0 (very poor recovery) to 150 (excellent quality of recovery). Excellent: QoR-15 score \> 135, Good: QoR-15 score between 122 and 135 (inclusive), Moderate: QoR-15 score between 90
Pain progression in the experimental groupDay 1Average pain score over 24 hours according to the Visual Analog Scale (0 -10)
Pain progression in the in the standard care (control) groupDay 1Average pain score over 24 hours according to the Visual Analog Scale (0 -10)
Rate of adherence to the standard pain management regimen (non-opioid analgesics) in the experimental groupBaselinePatient's declaration in the Thess Monitoring Application
Rate of adherence to the standard pain management regimen (non-opioid analgesics) in the standard care (control) groupBaselinePhone call from the patient
rate of adherence to the standard pain management regimen (non-opioid analgesics) in the in the standard care (control) groupDay 1Phone call from the patient
Incidence of adverse effects associated with opioid use in the experimental groupBaselineAdverse effects associated with opioid use will be recorded on the Thess Monitoring Application Nausea: yes/no Drowsiness: yes/no Dizziness: yes/no Itching: yes/no
Incidence of adverse effects associated with opioid use in the standard care (control) groupBaselineAdverse effects associated with opioid use will be recorded via a phone call to the patient Nausea: yes/no Drowsiness: yes/no Dizziness: yes/no Itching: yes/no
Adverse Events [Safety and Tolerability] in the experimental groupDay 7Qualitative assessment. Any adverse events of any cause related to treatment will be recorded in the electronic clinical registration form following a phone call to the patient.
Adverse Events [Safety and Tolerability]in the standard care (control) groupDay 7Qualitative assessment. Any adverse events of any cause related to treatment will be recorded in the electronic clinical registration form following a phone call to the patient.
Use of medication (including opioid medications and treatments outside the standard regimen) in the experimental groupDay 1Collection of data on treatments prescribed outside the standard regimen and prescriptions issued on discharge from hospital up to three months of follow-up. Data collection via the Tess Monitoring Application
Use of medication (including opioid medications and treatments outside the standard regimen) in the standard care (control) groupDay 1Collection of data on treatments prescribed outside the standard regimen and prescriptions issued on discharge from hospital up to three months of follow-up. Data collection on the electronic clinical registration form
Number of unplanned medical appointments and telephone contacts with healthcare professionals after discharge from hospital in the experimental groupDay 1Data collection via the Tess Monitoring Application
Number of unplanned medical appointments and telephone contacts with healthcare professionals after discharge from hospital in the standard care (control) groupDay 1Data collection on the electronic clinical registration form
Prescription issued outside of those prescribed upon hospital discharge in the experimental groupMonth 3Quantitative
Prescription issued outside of those prescribed upon hospital discharge in the standard care(control) groupMonth 3Quantitative
Number of days of sick leave prescribed in the experimental groupMonth 3Quantitative
Number of days of sick leave prescribed in the standard care (control) groupMonth 3Quantitative
Satisfaction questionnaire administered to the patient in the experimental groupDay 3Qualitative
Satisfaction questionnaire administered to the patient in the standard care (control) groupDay 3Qualitative
Satisfaction questionnaire administered to the anesthesiologist in the experimental groupEnd of the inclusion periodQualitative
Satisfaction questionnaire administered to the anesthesiologist in the standard care (control) groupEnd of the inclusion periodQualitative
System Usability Scale score during the follow-up call to patients in the experimental groupDay 30The System Usability Scale (SUS) score is a measure of the usability of an interactive system, derived from a questionnaire that includes ten items. Each item is presented as a positive statement, and users are asked to indicate their agreement or disagreement with it using a 5-point Likert scale. The score is recalculated based on the number of items answered correctly, with a score of 2.5 for each item. This scoring system allows the assessment of user satisfaction and the overall usability of the system.
System Usability Scale score from health providers to the experimental groupEnd of the inclusion periodThe System Usability Scale (SUS) score is a measure of the usability of an interactive system, derived from a questionnaire that includes ten items. Each item is presented as a positive statement, and users are asked to indicate their agreement or disagreement with it using a 5-point Likert scale. The score is recalculated based on the number of items answered correctly, with a score of 2.5 for each item. This scoring system allows the assessment of user satisfaction and the overall usability of the system.
System Usability Scale score during the follow-up call to patients in the standard care (control) groupDay 30The System Usability Scale (SUS) score is a measure of the usability of an interactive system, derived from a questionnaire that includes ten items. Each item is presented as a positive statement, and users are asked to indicate their agreement or disagreement with it using a 5-point Likert scale. The score is recalculated based on the number of items answered correctly, with a score of 2.5 for each item. This scoring system allows the assessment of user satisfaction and the overall usability of the system.
System Usability Scale score from health providers to the standard care (control) groupEnd of the inclusion periodThe System Usability Scale (SUS) score is a measure of the usability of an interactive system, derived from a questionnaire that includes ten items. Each item is presented as a positive statement, and users are asked to indicate their agreement or disagreement with it using a 5-point Likert scale. The score is recalculated based on the number of items answered correctly, with a score of 2.5 for each item. This scoring system allows the assessment of user satisfaction and the overall usability of the system.
DN2 questionnaire score in the experimental groupPost-operative Month 1The DN2 questionnaire is a simplified version of the DN4 (omitting the clinical examination), developed in France in 2005 by Bouhassira and the French Neuropathic Pain Group. It consists of two questions assessing the presence or absence of seven symptoms suggestive of neuropathic pain : burning, painful cold, electric shocks, tingling, prickling, numbness, and itching. The cutoff for a positive DN2 result is set at 3 out of 7 points. A positive DN2 result does not establish a formal diagnosis of neuropathic pain, as a clinical examination remains essential.
DN2 questionnaire score in the standard care (control) groupPost-operative Month 1The DN2 questionnaire is a simplified version of the DN4 (omitting the clinical examination), developed in France in 2005 by Bouhassira and the French Neuropathic Pain Group. It consists of two questions assessing the presence or absence of seven symptoms suggestive of neuropathic pain : burning, painful cold, electric shocks, tingling, prickling, numbness, and itching. The cutoff for a positive DN2 result is set at 3 out of 7 points. A positive DN2 result does not establish a formal diagnosis of neuropathic pain, as a clinical examination remains essential.
Rate of incidents, malfunctions, and organization deviations that occurred during implementation in the experimental groupMonth 3Qualitative
Time spent connected to the Thess Monitoring device per patient in the experimental groupMonth 3Quantitative, in minutes

Countries

France

Contacts

CONTACTJoël LHERMITE, Dr.
joel.lhermite@chu-nimes.fr+334.66.68.30.50
CONTACTAnissa MEGZARI
drc@chu-nimes.fr0466684236

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 9, 2026