Analgesic Territory Assessment of the Spinal Erector Block Using Pupillometry

Centre Hospitalier Universitaire de Saint Etienne30 enrolled

Overview

Few works have studied the area of analgesia covered by the spinal erector block in an objective manner, especially on the cephalo-caudal spread. The available data are dissection works or subjective data such as thermoalgesic or epicritic sensitivity. This information would however be relevant in order to propose a better analgesia. Indeed, it could explain certain failures by insufficient diffusion of the block. The use of a multistage block could be relevant, especially in the case of osteosynthesis on several vertebral levels.

Pupillometry makes possible to monitor analgesia based on the pupillary dilation reflex to pain. The goal is to establish an objective mapping of these type of analgesia from these data.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Anesthesia, Local

Interventions

data collectedOTHER

data collected: * Morphological data of the patients * Data of the erector block realization * Pupillometric data :the variation of the pupil size on stimulation (in percentage of the base diameter)

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients receiving erector spinae block for pain management of spinal osteosynthesis Exclusion Criteria: * Patient refusal * Known allergy to local anesthetics * Contraindication to locoregional anesthesia (haemostasis disorder, infection, peripheral neuropathy) * Technical impossibility to perform a spinal erector block * Pathology with dysautonomia altering the pupillary reflex: diabetes mellitus with diabetic retinopathy, multiple sclerosis, systemic amyloidosis, uncontrolled hypertension, glaucoma * Current treatment likely to alter pupillary dilation reflex to pain : antiemetic (droperidol, metoclopramide), alpha-2 agonist (clonidine) * Serious psychiatric history * Drug abuse * Pregnancy

Locations (1)

CHU Saint-Etienne

Saint-Etienne, France

Outcomes

Primary Outcomes

variation of the pupil size (in percentage)

Evaluation the territory covered by the spinal erector block by variation of the pupil size (in percentage). Variation of the pupil size on stimulation will allow to deduce if the dermatome is covered by the spinal erector block analgesia.

Time frame: During the surgery

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.