This study evaluates the pain score numerical rating, after sciatic analgesic continuous block, in patients with ischemic pain before surgery of limb revascularization. All patients received those blocks to control ischemic severe pain.

Peripheral Obstructive Arterial Disease (PAD) is a disease with a prevalence of 10 to 25% in the population over 55 years, increasing with age, and may have disabling pain as a symptom, and sometimes the surgical approach is required. In the context of public hospital in Rio de Janeiro, where patients need to wait for surgery, the Anesthesiology and Acute Pain service routinely has sciatic nerve analgesic block in the popliteal region as a preoperative procedure.

The primary objective of the present study is to describe a series of cases where the technique was applied in order to relieve the pain of these patients, following the Pain Score Numerical rating as a reference. Secondary objectives will be to describe difficulties associated with the technique and possible associated adverse factors.

Inclusion Criteria:

• preoperative continuous sciatic-popliteal nerve block
• lower limb angioplasty
• peripheral arterial disease;
• between 2017 and 2018 years;
• correct filling of numerical rating pain evaluation in the medical record

Exclusion Criteria:

• peripheral block to treat another pathology or condition in te same patient;
• peripheral block at another concomitant site (other than the popliteal);
• No adequate record of the care received in the medical record
• if medical record is not available during the data collection period

Patients with lower limb isquemic pain caused by peripheral arterial disease in the preoperative period.