Peribulbar Block Versus Subtenon's Injection in Redo Vitreoretinal Surgery (subtenon's)

Abeer Samir Salem

Status: Enrolling

Conditions: Analgesia

Treatments: Procedure: peribulbar block versus subtenon's block

Study type: Interventional

Funder types: Other

Identifiers

NCT04978415

subtenon's RIO

Details and patient eligibility

About

To compare the efficacy and efficiency of peribulbar block versus sub-Tenon's capsule injection of local anesthetic in redo vitreoretinal surgery

Full description

Sixty patients undergoing vitreoretinal surgery were randomized to receive either peribulbar or sub-Tenon's capsule injection of 8 ml of a 20:80 mixture of 2% lidocaine and 0.5% bupivacaine with 60 IU hyalouronic acid.

The primary outcome measured was intraoperative eye pain, which was rated by patients in both groups using an 11-point (0-10) numerical visual analogue scale immediately after.

The surgeons indicated whether they perceived patient discomfort during 4 different stages of the operation: opening of the conjunctiva, vitrectomy (if performed), placement of scleral buckle (if performed) or using the laser probe, and closing of the conjunctiva.

The need for supplemental local anesthesia, and use of IV sedation for additional pain control intraoperatively were compared between the two groups.

Enrollment: 60 estimated patients

Sex: All

Ages: 18 to 80 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• age between 18 and 80

Exclusion criteria

• Uncooperative patients
• Bleeding disorders
• High axial length (30mm) with previous buckle surgery

Trial design

Primary purpose: Screening

Allocation: Randomized

Interventional model: Sequential Assignment

Masking: None (Open label)

---

60 participants in 2 patient groups

subtenon's block

Experimental group

Description:

we use the subtenon cannula to inject the local anesthetic mixture

Treatment:

Procedure: peribulbar block versus subtenon's block

peribulbar block

Experimental group

Description:

we use the usual 25G sharp needle to inject the local anesthetic mixture

Treatment:

Procedure: peribulbar block versus subtenon's block