Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Epidural regional anesthesia is a technique to eliminate or lessen pain during obstetric labor and childbirth. It consists in establishing a catheter into the epidural space and to block the transmission of pain sensations by injecting a local anesthetic and an opioid. In 10-25% of cases the epidural does not give perfect results, causing it to test its effectiveness, which is mainly done by questioning the patient on mitigation or disappearance of pain. This collaboration of patients is sometimes limited in our care structure by the inability to assess or express the pain, mainly due to cultural differences or language barriers, which can represent up to 15% of women in our institution. This led to develop objective measures of pain techniques used at the bedside.
Pupil diameter (PD) varies under the double influence of sympathetic system (Σ), dilator of the pupil, and parasympathetic system (pΣ).
The PD increases in response to painful stimulation, in proportion to the intensity of the nociceptive stimulus. This variation of PD has been proposed as a means of evaluation of pain in patients under general anesthesia, but has been little studied in conscious subjects.
There are other permanent changes in the PD, due to constant interaction between Σ and pΣ systems. Few data have been published to date on this PD variability (PDV).
Not provided
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Patients | Experimental | Pain assess by :
|
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Portable video pupillometer | Device | Portable video pupillometer measures pupil diameter (PD) in patient during obstetrical labor |
|
| Measure | Description | Time Frame |
|---|---|---|
| Pupil diameter variability | Compare Pupil Diameter Variability (PDV) measured before Epidural regional anesthesia and after Epidural regional anesthesia. PDV is aera under the curve of Pupil Diameter from start of the contraction (baseline) to time to peak of the contraction. | From baseline to fifteen minutes after start of Epidural regional anesthesia |
| Measure | Description | Time Frame |
|---|---|---|
| pupil diameter | Compare the Pupil Diameter measured five seconds after time to peak of contraction before Epidural regional anesthesia and after Epidural regional anesthesia | From baseline to fifteen minutes after start of Epidural regional anesthesia |
| Visual Analogic Scale (VAS) |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Affiliation | Role |
|---|---|---|
| David Charier, MD | Centre Hospitalier Universitaire de Saint Etienne | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| CHU Saint-Etienne | Saint-Etienne | 42055 | France |
Not provided
| ID | Term |
|---|---|
| D010146 | Pain |
| ID | Term |
|---|---|
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Compare the VAS measured at the end of contraction before Epidural regional anesthesia and after Epidural regional anesthesia. |
| From baseline to fifteen minutes after start of Epidural regional anesthesia |