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ECVS Tobias > 125. Emergency Ophthalmic Surgery Questions > Flashcards

125. Emergency Ophthalmic Surgery Questions Flashcards

1
Q

What is the preferred suture material for closing the muscle and fibrous layers in full-thickness eyelid lacerations? a) 3-0 Nylon b) 5-0 or 6-0 Polyglactin 910 c) 4-0 Polydioxanone d) 7-0 Polypropylene

A

b) 5-0 or 6-0 Polyglactin 910

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2
Q

The primary goal in treating eyelid lacerations is to: a) Remove necrotic tissue b) Prevent scar formation c) Achieve anatomic reapposition d) Promote granulation tissue

A

c) Achieve anatomic reapposition

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3
Q

The figure of eight suture technique is preferred for: a) Corneal laceration repair b) Nasolacrimal duct laceration c) Eyelid margin closure d) Third eyelid lacerations

A

c) Eyelid margin closure

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4
Q

Damage to the nasolacrimal puncta in medial canthal lacerations may lead to: a) Chronic epiphora b) Corneal ulceration c) Conjunctivitis d) Keratoconjunctivitis sicca

A

a) Chronic epiphora

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5
Q

The most common autograft used in corneal reconstruction in veterinary ophthalmology is: a) Lamellar keratoplasty b) Bulbar conjunctival graft c) Corneal allograft d) Biosynthetic graft

A

b) Bulbar conjunctival graft

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6
Q

The primary indication for performing a conjunctival pedicle graft is: a) Lens luxation b) Superficial corneal ulcer c) Deepening corneal ulcer d) Retinal detachment

A

c) Deepening corneal ulcer

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7
Q

When performing a rotational conjunctival pedicle graft, the incision begins: a) 2 mm proximal to the limbus b) 1 mm temporal to the limbus c) At the nasal limbus d) At the center of the ulcer

A

b) 1 mm temporal to the limbus

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8
Q

Which suture pattern is preferred for securing a corneal allograft? a) Cruciate b) Simple continuous c) Horizontal mattress d) Simple interrupted

A

d) Simple interrupted

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9
Q

The most common site of scleral rupture in dogs following blunt trauma is: a) The limbus b) The posterior pole c) The equator d) The optic nerve head

A

b) The posterior pole

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10
Q

Corneal foreign bodies are typically: a) Metallic fragments b) Organic plant material c) Synthetic fibers d) Bone splinters

A

b) Organic plant material

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11
Q

An anterior lens luxation is considered an emergency because it can lead to: a) Cataract formation b) Severe anterior uveitis c) Conjunctivitis d) Corneal dystrophy

A

b) Severe anterior uveitis

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12
Q

The optimal treatment for a proptosed eye with minimal extraocular muscle damage is: a) Enucleation b) Temporary tarsorrhaphy c) Orbital exenteration d) Topical corticosteroids

A

b) Temporary tarsorrhaphy

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13
Q

In cases of traumatic proptosis, which muscle is most commonly torn? a) Lateral rectus b) Medial rectus c) Dorsal oblique d) Ventral oblique

A

b) Medial rectus

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14
Q

During a temporary keratostomy, which gauge needle is typically used? a) 18 gauge b) 21 gauge c) 25 gauge d) 30 gauge

A

d) 30 gauge

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15
Q

Which of the following techniques is most commonly used for emergency extraction of a luxated lens? a) Cryoextraction b) Phacoemulsification c) Intracapsular cataract extraction d) Lens loop extraction

A

a) Cryoextraction

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16
Q

The preferred orientation for the conjunctival pedicle arm in relation to blinking action is: a) Horizontal b) Vertical c) Oblique d) Circular

A

b) Vertical

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17
Q

For corneal reconstruction, extracellular matrix grafts are typically derived from: a) Bovine skin b) Porcine small intestinal submucosa c) Equine pericardium d) Canine cartilage

A

b) Porcine small intestinal submucosa

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18
Q

The most important predictor of successful corneal allograft adherence is: a) The use of antibiotics b) Removal of the epithelium c) Size of the graft d) Suturing technique

A

b) Removal of the epithelium

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19
Q

What is the most common long-term complication following temporary tarsorrhaphy? a) Corneal ulceration b) Glaucoma c) Orbital cellulitis d) Retinal detachment

A

a) Corneal ulceration

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20
Q

A conjunctival graft should ideally be left in place for: a) 2-3 weeks b) 4-5 weeks c) 6-8 weeks d) 9-10 weeks

A

c) 6-8 weeks

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21
Q

Eyelid lacerations in dogs and cats generally heal poorly due to poor vascular supply. (True/False)

A

False

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22
Q

Conjunctival pedicle grafts maintain their own blood supply, which aids in corneal ulcer healing. (True/False)

A

True

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23
Q

In cases of traumatic proptosis, enucleation is always required. (True/False)

A

False

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24
Q

Anterior lens luxation is an emergency due to the risk of severe anterior uveitis. (True/False)

A

True

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25
Q

A figure of eight suture pattern is commonly used for securing a conjunctival graft. (True/False)

A

False

26
Q

Damage to the nasolacrimal duct in medial canthal injuries can lead to chronic epiphora. (True/False)

A

True

27
Q

Bulbar conjunctival grafts are only suitable for superficial corneal ulcers. (True/False)

A

False

28
Q

A corneoconjunctival transposition can be used for axial lesions larger than 6 mm in diameter. (True/False)

A

False

29
Q

Phacoemulsification is a technique used to remove a luxated lens. (True/False)

A

True

30
Q

Corneal allografts can be stored in frozen conditions for months with no loss of endothelial cell viability. (True/False)

A

False

31
Q

Iris tissue herniating through a corneal laceration should always be sutured back into the eye. (True/False)

A

False

32
Q

Latanoprost is used to constrict the pupil and maintain the position of a luxated lens. (True/False)

A

True

33
Q

Blunt trauma is more likely to cause posterior scleral ruptures in dogs than in cats. (True/False)

A

False

34
Q

Conjunctival grafts should remain in place for 6 to 8 weeks to ensure proper incorporation. (True/False)

A

True

35
Q

Temporary keratostomy involves inserting a 30 gauge needle to relieve intraocular pressure. (True/False)

A

True

36
Q

Silicone stents used for nasolacrimal duct repair should remain in place for 6 to 8 weeks. (True/False)

A

False

37
Q

Intraocular pressure must reach approximately 7000 mm Hg for scleral rupture to occur. (True/False)

A

True

38
Q

A horizontal mattress suture pattern is preferred for closing corneal lacerations. (True/False)

A

False

39
Q

Corneal endothelial damage is more likely with frozen allografts compared to fresh ones. (True/False)

A

True

40
Q

Topical corticosteroids are contraindicated in cases of corneal ulceration. (True/False)

A

True

41
Q

The optimal suture size for repairing conjunctival lacerations in small animals is: a) 3-0 b) 4-0 c) 5-0 d) 6-0

A

d) 6-0

42
Q

What type of foreign bodies most commonly cause corneal perforation in dogs? a) Glass fragments b) Plant material c) Metallic splinters d) Plastic debris

A

b) Plant material

43
Q

The most effective treatment for rapidly deepening corneal ulcers is: a) Topical antibiotics b) Conjunctival graft c) Corneal debridement d) Systemic corticosteroids

A

b) Conjunctival graft

44
Q

The term ‘Gundersons graft’ refers to: a) A scleral graft b) A free skin graft c) A bulbar conjunctival graft d) A lamellar corneal graft

A

c) A bulbar conjunctival graft

45
Q

In corneal reconstruction, which layer is primarily targeted to enhance tectonic stability? a) Epithelium b) Endothelium c) Stroma d) Descemet’s membrane

A

c) Stroma

46
Q

What is the preferred suture pattern for closing deep corneal lacerations? a) Cruciate b) Horizontal mattress c) Simple continuous d) Simple interrupted

A

d) Simple interrupted

47
Q

If iris tissue is herniated through a corneal laceration and contaminated, it should be: a) Sutured back in place b) Reduced into the eye c) Resected d) Left untreated

A

c) Resected

48
Q

In a conjunctival pedicle graft, what is the purpose of dissecting Tenon’s capsule from the graft? a) Improve blood supply b) Reduce tension c) Increase graft thickness d) Facilitate suturing

A

b) Reduce tension

49
Q

Which technique is used to remove a retro-third eyelid foreign body? a) Cryoextraction b) Lateral canthotomy c) Topical anesthetic and forceps d) Intravitreal injection

A

c) Topical anesthetic and forceps

50
Q

Which of the following is NOT a typical indication for corneoconjunctival transposition? a) Superficial corneal ulcers b) Deep corneal ulcers c) Perforated corneas d) Axial lesions <5mm

A

a) Superficial corneal ulcers

51
Q

What is the most significant complication associated with full-thickness corneal grafts? a) Persistent ulceration b) Corneal edema c) Conjunctivitis d) Lens damage

A

b) Corneal edema

52
Q

Corneal endothelial cell death is commonly associated with: a) Fresh corneal grafts b) Freezing corneal tissue c) Lamellar keratoplasty d) Topical antibiotic therapy

A

b) Freezing corneal tissue

53
Q

Which medication is commonly used to constrict the pupil and keep a posteriorly luxated lens in place? a) Timolol b) Latanoprost c) Atropine d) Pilocarpine

A

b) Latanoprost

54
Q

Which procedure is typically performed for a luxated lens that cannot be surgically removed immediately? a) Lens repositioning b) Phacoemulsification c) Anterior chamber washout d) Enucleation

A

a) Lens repositioning

55
Q

In traumatic proptosis, the most critical step in successful reduction is: a) Application of topical corticosteroids b) Identification and stabilization of eyelid margins c) Orbital decompression d) Use of systemic antibiotics

A

b) Identification and stabilization of eyelid margins

56
Q

What technique is used to manage a large scleral rupture with macerated edges? a) Cryotherapy b) Phacoemulsification c) Scleral patch graft d) Air tamponade

A

c) Scleral patch graft

57
Q

Which instrument is commonly used for blunt dissection of Tenons capsule during a pedicle graft? a) Scalpel b) Strabismus scissors c) Beaver blade d) Needle driver

A

b) Strabismus scissors

58
Q

The ideal time frame for keeping a silicone stent in place when repairing nasolacrimal canaliculi is: a) 1-2 weeks b) 3-4 weeks c) 2-4 months d) 6 months

A

c) 2-4 months

59
Q

After lens extraction, which procedure helps reduce the risk of retinal detachment? a) Intravitreal injection b) Anterior vitrectomy c) Posterior capsulotomy d) Scleral reinforcement

A

b) Anterior vitrectomy

60
Q

Which of the following is an absolute contraindication for attempting to reduce a proptosed globe? a) Severe hyphema b) Lateral strabismus c) Complete loss of extraocular muscles d) Intact conjunctiva

A

c) Complete loss of extraocular muscles

ECVS Tobias (16 decks)

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