Peribulbar Block Versus Subtenon's Injection in Redo Vitreoretinal Surgery

Comparative Study Between Peribulbar Block Technique and Sub-Tenon's Technique in Adult Patients Undergoing Redo Vitreoretinal Surgery: RCT

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT04978415

Acronym

subtenon's

Enrollment

Registered

2021-07-27

Start date

2021-10-01

Completion date

2022-11-30

Last updated

2022-09-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Analgesia

Brief summary

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

Detailed 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.

Interventions

PROCEDUREperibulbar block versus subtenon's block

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 0.75% bupivacaine with 60 IU hyalouronic acid. two groups 30 patient each (group p and group s) after connecting the patient to the monitor, we give him sedation 50 mg propofol, apply a nasal cannula group P: receives 2 injection peribulbar block group S: receives single injection subtenon Patients rate their pain sensation in both groups using an 11-point (0-10) numerical visual analogue scale immediately after surgery.

Study design

Allocation

RANDOMIZED

Intervention model

SEQUENTIAL

Primary purpose

SCREENING

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Yes

Inclusion criteria

* age between 18 and 80

Exclusion criteria

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

Design outcomes

Primary

Measure	Time frame	Description
intraoperative pain	during whole surgery duration (around 2 hours)	11 point verbal rating score from 0 to 10 where 0 is no pain and 10 is intolerable pain patient will be asked immediately after surgery about pain the need for intraoperative sedation will be recorded

Countries

Egypt

Contacts

Primary ContactAbeer Samir, MD

abeersamirali@gmail.com01125666006

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026