Final - Drainage Device Surgery

Question 1

Indications (6)

Answer 1

Failed trabeculectomy
Young (1 mo -> 13 yrs)
NVG
Uveitic glauc
Severe conj scarring, previous ocular sx
Aniridia

Question 2

Where implanted

Answer 2

In eye, extended from AC to subconj space

Question 3

Design

Answer 3

Silicone tube from AC to plate/disc/encircling element beneath conj and Tenon’s
-open tubes are likely to have early post-op hypotony (require temporary closure)

Question 4

Why elevated IOPs first weeks/months after implantation

Answer 4

Fibrous capsule formation around plate (“hypertensive phase”)
-may lead to failure

Question 5

Names of open-tube devices

Answer 5

Baervedlt
Molteno
Schocket

Question 6

Flow-restricted device

Answer 6

Ahmed

Krupin

Question 7

Complications

Answer 7

Hypotony
Elev IOP
Migration, extrusion, erosion of tube
Endopthalmitis
Visual loss
K decompensation and graft failure
Diplopia and ocular motility disturbance