Peripheral Analgesia in Painful Diabetic Neuropathy

Not Applicable

Withdrawn

• Conditions: Neuropathic Pain; Diabetic Neuropathy Peripheral; Diabetic Foot Infection
• Interventions: Procedure: Analgesic treatment; Procedure: Continuous peripheral nerve blocks

• Registration Number: NCT03354806
• Lead Sponsor: Centre Hospitalier Universitaire de la Réunion

Brief Summary

Chronic obliterative arteriopathy of the inferior limbs is a frequent condition observed in diabetics. The later stages induce pain at rest and trophic disorders (ulcer, gangrene) that lead to chronic limb ischemia. Without possible surgical revascularization ,pain management and tissue healing are used to avoid amputation.

Prevalence of diabetes is twice higher in Reunion Island than in metropolitan France. As a consequence, the rate co-morbobidities, such as chronic obliterative arteriopathy of the inferior limbs, is also increases.

This study compares the efficiency of two analgesic treatments in diabetics with forefoot injuries.

Detailed Description

Patients are allocated in two groups regarding :

* their eligibility to analgesic treatment using continuous peripheral nerve blocks

* the unability of usual pain management to reduce their pain (pain visual analogic scale equal to or more than 4).

When patient 's response to pharmacological analgesic treatment is sufficient (pain visual analogic scale equal to or less than 3), patient is allocated to the control group.

Patients of experimental group received a continous analgesic treatment for 6 weeks using ropivacaine (2mg/ml, flow rate 7 ml/h).

Patients of control group received an analgesic treatment according the recommended pain ladder of World Health Organization (WHO). Opioids for mild-to-moderate pain are used in combination with a non-opioid analgesic, such as paracetamol, at the second step of the ladder. If regular maximum doses of opioids for mild-to-moderate pain do not achieve adequate analgesia, then they should be replaced with an opioid for moderate-to-severe pain, such as morphine.

Efficiency of both treatment is assessed the improvement of oxygen level in the tissue below the skin of the injured forefoot through the study.

Study Timeline

• Study First Submitted: 2017-11-22
• Study First Submitted QC: 2017-11-22
• Study First Posted: 2017-11-28
• Study Start: 2018-06
• Status Verified: 2019-03
• Last Update Submitted: 2019-03-06
• Last Update Posted: 2019-03-07
• Primary Completion: 2019-09
• Study Completion: 2019-12

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: All
• Target Recruitment: Not specified

Inclusion Criteria

• Hospitalized patient
• Diabetics with chronic obliterative arteriopathy of the inferior limbs
• Permanent limb ischaemia with a TcPO2 of the front-foot of at least 10 mmHg under atmospheric conditions
• Lack of surgical revascularization
• No contraindication to hyperbaric therapy
• Signed informed consent

Exclusion Criteria

• Contraindication to ropivacaine
• Conditions that could alter hyperbaric measurements (anemia < 8 g/dl, cardiac or respiratory insufficiency)
• patients with planned limb amputation

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Analgesic treatment	Analgesic treatment	Pharmacological pain management in accordance with WHO's pain relief ladder
Continuous peripheral nerve blocks	Continuous peripheral nerve blocks	Ropivacaine-continous treatment using catheters for continous sciatic nerve blocks

Primary Outcome Measures

Name	Time	Method
Foot tissue oxygenation on day 2	on day 2	Measurement of transcutaneous oxygen tension (TcPO2) at room conditions

Secondary Outcome Measures

Name	Time	Method
Foot tissue oxygenation in hyperaemia-induced condition on day 2	on week 6	Measurement of transcutaneous oxygen tension (TcPO2) under hyperbaric conditions
Foot tissue oxygenation on week 6	on week 6	Measurement of transcutaneous oxygen tension (TcPO2) at room conditions