Page 170 - Manual of Equine Field Surgery

166 OPHTHALMIC SURGERIES

Figure 28-1 Footplate of lavage tube.

•
Figure 28-3 Finger guiding trocar .

• .
'

Tarsal conjunctiva

plate Levator palpebrae

superloris m.
Cilia
Palpebral conjunctiva

Tarsal
Semilunar fold
glands ---- (palpebra tertia,

Skin ---.0
third eyelid)

:.u.\-- Inferior

Lavage tube :;:;::=~ fornix
in situ"'-...-::

~~;t-,..,....

Figure 28-2 Schematic of eyelid anatomy.

into the trocar fron1 the conjunctiva! fornix. The

tubing is advanced until it is visualized i11 the tip

of the trocar and the trocar and tubing are then

advanced through the skin, leaving the subpalpe-

bral lavage tube in the ventral eyelid as the trocar

is removed. The surgeon advances the subpalpe- Figure 28-4 Horse's head with lavage tube in place.

bral lavage tube until the circular footplate is

secure against palpebral conjunctiva. Prior to

suturing the lavage tube into place, a 20-gauge

Luer stub adapter with attached injection port is

inserted into the free end of the lavage tube and

patency is again tested by injecting saline or fluo- adjacent to the ipsilateral ear. These tabs of tape

rescein through the lavage tube. Short strips are then sutured in place using two No. 2-0

of duct tape or porous medical grade tape are monofilament nylon simple interrupted sutures

secured to the lavage tube adjacent to the exit site per tab of tape to secure the lavage tube to the

through the ventral eyelid, between the eyes, and patient (Figure 28-4).