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Retina > PPV > Flashcards

PPV Flashcards

1
Q

Pars Plana

A

ciliary body 1mm limbus posteriorly 6 mm. 2mm pars plicata 4 mm flattened pars plana

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2
Q

surgical incision

A

phakic 4mm, pseudophakic 3.5mm

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3
Q

Innocuous peripheral retinal degeneration

A

microcystoid (peripheral cystoid) degeneration, Paving stone degeneration, Reticular (honeycomb) degeneration, Pars plana cyst

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4
Q

Dentate processes

A

nasally, retina extensions onto the pars plana

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5
Q

Oral bays

A

scalloped edges of pars plana epi between dentate processes

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6
Q

Meridional folds

A

superonasal, may small hole, thickened retina in line with dentate processes

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7
Q

microcystoid (peripheral cystoid) degeneration

A

tiny vesicles on grey-white background, all eyes, increase with age, may degenerative schisis

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8
Q

Paving stone degeneration

A

inferior, between equator and ora, yellow-white chorioretinal atrophy, 25% of normal

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9
Q

Reticular (honeycomb) degeneration

A

age-related perivascular pigmentation

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10
Q

Pars plana cyst

A

temporally, 5-10% eyes, from non-pigmented ciliary epithelium

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11
Q

Lattice degeneration

A

8% eyes, 40% of RD, bi, temporal superior, between equator and posterior border of vitreous base, discontinuity of ILM

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12
Q

Snailtrack degeneration

A

demarcated snowflakes, white frost-like appearance

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13
Q

Cystic retinal tuft

A

5% eyes, in 5-10% of RD, temporally, discrete elevated whitish lesion, glial, vitreoretinal adhesion

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14
Q

Degenerative retinoschisis

A

inferotemporal, bi in 80%, typical-outer plexiform layer,anteriorly to equator, reticular-NFL,worse,posteriorly. convex, smooth, thin, immobile

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15
Q

Zonular traction tuft

A

nasally, 15%, near ora serrata

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16
Q

white with pressure

A

translucent white-gray, indentation, normal eyes, may with lattice, snailtrack, retinoschisis

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17
Q

white without pressure

A

without indentation. condensed vitreous. retinal breaks, giant tears

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18
Q

Myopic choroidal atrophy

A

posterior pole and equatorial area. may lead to RD

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19
Q

synchysis

A

liquefaction

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20
Q

liquefaction

A

synchysis

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21
Q

condensation

A

syneresis

22
Q

syneresis

A

condensation

23
Q

PVD - kolejność

A

perifoveal - foveal - posterior retina/equator - optic disc - vitreous base. complications 27%. 20% retinal tear

24
Q

Retinal tear - location

A

upper temporal

25
Q

retinal detachment - definition

A

tear more than one disc diameter

26
Q

dialyses - what, where, when

A

circumferential tears along ora serrata, vitreous gel attached to the posterior margin. blunt trauma

27
Q

giant retinal tear - definition

A

U-tear involving 90st or more. vitreous gel attached to the anterior margin

28
Q

risk for RD

A

symptomatic>asymptomatic, traction, larger, superior, equatorial>oral breaks, operculated-very low, asymptomatic U-tears-low risk

29
Q

Cryotherapy - when, parameters

A

multiple contiguous tears, extensive tears, hazy media, small pupils. 0.1s 200-300 um 3-mirror or 100-200 wide-field. start 200mW

30
Q

rRD - how many in myopic

A

40%

31
Q

rRD - how many symptoms

A

60%

32
Q

rRD - location order

A

60% superotemporal - 15% superonasal/inferotermporal - 10% inferonasal

33
Q

rRD - how many more than one break

A

50%

34
Q

rRD - location of more quickly appreciated symptoms

A

lower field defect

35
Q

flashes - where in visual field

A

temporal

36
Q

Schwartz-Matsuo syndrome

A

raised IOP, rRD, mild anterior uveitis, often due to a dialysis due to prior blunt trauma in a young man

37
Q

Choroidal detachment - when, features

A

hypotony, uvetitis, posterior scleritis, choroidal tumors, cyclodialysis cleft, RD, uveal effusion syndrome. Brown, convex, smooth, relatively immobile

38
Q

Pneumatic retinopaxy - definition, jaki gas, when

A

intravitreal gas bubble with cryotherapy or laser. SF6, C3F8, uncomplicated IR with small break. cluster breaks more than 2 clock hour in upper 2/3

39
Q

SF6

A

sulfur hexafluoride, doubles volume, lasts 10-14 days

40
Q

sulfur hexafluoride

A

SF6, doubles volume, lasts 10-14 days

41
Q

C3F8

A

perfluoropropane, quadruples its volume, lasts 55-65 days

42
Q

perfluoropropane

A

C3F8, quadruples its volume, lasts 55-65 days

43
Q

complications of scleral buckle

A

diplopia, CME 25%, ERM 15%, persistent subfoveal fluid, foveal disruption, anterior segment ischemia, extrusion/intrusion/infection, elevated IOP, choroidal detachment, PVR, reopening of break

44
Q

tRD - features

A

no photopsia, concave, mobility reduced, shallower SRF

45
Q

eRD - causes

A

melanoma, hemangioma, meta, Harada disease, posterior scleritis, bullous CSR, RD surgery, panretinal photocoagulation, CNV, hypertensive choroidopathy, uveal effusion syndrome

46
Q

eRD - features

A

convex, smooth, not corrugated, very mobile, shifting fluid

47
Q

PPV devices

A

vitreous cutter, fibreoptic probe, infusion cannula, scissors, forceps, flute needle, endodiathermy, endolaser delivery systems

48
Q

C2F6

A

perfluorethane, triples volume, lasts 30-35 days

49
Q

perfluorethane

A

C2F6, triples volume, lasts 30-35 days

50
Q

When PPV for rDR

A

breaks cannot be visualized (hemor, debris, PCO), giant tears, large posterior breaks, presence of PVD (last 3 - unlikely to be closed with buckle)

51
Q

PPV complications

A

Raised IOP (overexpansion gas, silicone early-pupillary block, emulsified late, ghost cell, inflammatory, steroid), cataract (gas-induced feathering of posterior capsule, silicone, delayed-nuclear sclerosis), band keratopathy (extended silicone oil)

Retina (8 decks)

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