Lidocaine 5% Plasters (Versatis® 5%) in Pediatric Neuropathic Pains and Vasoocclusive Sickle Cell Crisis Pains

Lidocaine 5% plaster (VERSATIS® 5%) showed its efficacy and safety in the post-herpetic zoster adult pains. This treatment is recommended in first intention in adult neuropathic pains with allodynia.

The purpose of this study is to assess efficacy and safety of lidocaine 5% plaster (VERSATIS® 5%) in the pediatric neuropathic pains and vasoocclusive sickle cell crises pains.

Pediatric neuropathic pain are infrequent. It's difficult to estimate the prevalence. It may result from several causes : infectious (post-herpetic neuropathy), traumatic (tumor or Positional)or toxic (chemotherapy or radiotherapy). They are often associated with malignant pediatric disease.

These pains are spontaneous, continuous or intermittent, as type of burns or electric shocks or abnormal skin sensation (hyperesthesia or allodynia). Treatment is the same as in adults: antiepileptic or neuroleptics, sometimes associated with analgesic (level 2 or 3).

Lidocaine 5% plaster are used in adults as first line of treatment to reduce post-herpetic neuropathic pain, especially in cases of mechanical allodynia. These plasters are indicated for the symptomatic treatment of post-herpetic neuropathic pain.

Each plaster contains 700 mg of lidocaine. It must be applied on the painful area once daily for a maximum period of 12 hours per 24 hours.

The primary endpoint is to evaluate the efficacy of lidocaine 5% plaster (VERSATIS 5%) after 12 hours on reducing of pure or mixed neuropathic pain and on reducing of vasoocclusive sickle cell pain, localized, superficial, in child, adolescent and young adult.

The secondary endpoint are:

1. to evaluate the efficacy of lidocaine 5% plaster (VERSATIS 5%) after 6 hours on reducing of pure or mixed neuropathic pain and on reducing of vasoocclusive sickle cell pain, localized, superficial, in child, adolescent and young adult.
2. to evaluate safety of lidocaine 5% plaster (VERSATIS® 5%) in these same indications.

Eligibility Criteria:
Inclusion Criteria:

* 6 years \<= Age \<= 21 years
* With:

  * Pure or mixed, localized, superficial neuropathic pains for which the neuropathic pain score DN4 is greater than or equal to 4
  * Or localized, superficial sickle cell crisis pains Insufficiently relieved by commonly used therapeutic (analgesic level II or III and / or antiepileptic drugs, and / or neuroleptics) - GCS \> 12
* Covered by a medical insurance
* Signed written informed consent form(for minors unemancipated, permission will be given by holders of parental authority)

Exclusion Criteria:

* Clinical condition not permitting data reporting (impaired consciousness)
* Painful area with an surface greater than:

  * 150 cm² for a patient with total body surface area \< 1 m²
  * 300 cm² for a patient with 1 m² \< total body surface area \< 1.5 m²
  * 450 cm² for a patient with total body surface area \> 1.5 m²
* Existence of a statement for the use of lidocaine 5% (VERSATIS® 5%) plaster as defined in the summary of product characteristics, as:

  * known hypersensitivity to the active substance or excipients
  * known hypersensitivity to other local anesthetics such as amide (eg bupivacaine, etidocaine, mepivacaine and prilocaine)
  * inflammatory or injured skin (active lesions of herpes zoster, dermatitis or wounds)
* Severe cardiac insufficiency
* Severe renal insufficiency
* Severe hepatic insufficiency
* Patient receiving anti-arrhythmic class I or other local anesthetics.
* Pregnant or lactating female or female of child-bearing potential not employing adequate contraception
* Patient included in another clinical trial on the management of pain