Ocular Trauma Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Ocular Trauma. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Ocular Trauma Indian Medical PG Question 1: Which of the following statements are correct regarding primary survey/management of traumatic head injury patient?
I. Ensure adequate oxygenation and circulation
II. Exclude hypoglycaemia
III. Check for mechanism of injury
IV. Check pupil size and response
Select the answer using the code given below :
- A. II, III and IV
- B. I, III and IV
- C. I, II and III
- D. I, II and IV (Correct Answer)
Ocular Trauma Explanation: ***I, II and IV***
- **Primary survey** in trauma management, including head injury, focuses on immediately life-threatening conditions (Airway, Breathing, Circulation, Disability, Exposure). Ensuring adequate **oxygenation and circulation** (Statement I) is paramount to prevent secondary brain injury.
- Exclude **hypoglycemia** (Statement II) is critical because altered mental status due to low blood sugar can mimic head injury and delay appropriate treatment, making it an essential part of the 'D' (disability) assessment. Checking **pupil size and response** (Statement IV) is also part of the 'D' assessment, providing vital information about potential brain stem compromise or intracranial pressure changes.
*II, III and IV*
- While excluding hypoglycemia and checking pupil response are crucial parts of the primary survey, Statement III, "Check for mechanism of injury," is typically part of the **secondary survey** or initial assessment but not immediately life-saving like ABCD.
- The primary survey prioritizes immediate threats to life, and while understanding the mechanism of injury informs subsequent care, it does not directly address a patient's immediate physiologic stability.
*I, III and IV*
- This option includes checking the mechanism of injury (Statement III) as part of the primary survey, which is generally conducted after the **life-threatening conditions** are addressed.
- It omits the critical step of excluding **hypoglycemia** (Statement II), which is an immediate reversible cause of altered mental status that must be ruled out during the primary assessment.
*I, II and III*
- This option correctly includes ensuring adequate **oxygenation and circulation** (Statement I) and excluding **hypoglycemia** (Statement II) as part of the primary survey.
- However, it incorrectly includes checking for the **mechanism of injury** (Statement III) as a primary survey component and omits checking **pupil size and response** (Statement IV), which is an essential part of the 'Disability' assessment in the primary survey for head injury.
Ocular Trauma Indian Medical PG Question 2: A case of injury to right brow due to a fall from scooter presents with sudden loss of vision in the right eye. The pupil shows absent direct reflex but a normal consensual pupillary reflex is present. The fundus is normal. The treatment of choice is:
- A. Pulse methyl Prednisolone 250 mg four times daily for three days
- B. Emergency optic canal decompression
- C. Oral Prednisolone 1.5 mg/kg body weight
- D. Intensive intravenous corticosteroids as prescribed for spinal injuries to be instituted within six hours (Correct Answer)
Ocular Trauma Explanation: ***Intensive intravenous corticosteroids as prescribed for spinal injuries to be instituted within six hours***
- The sudden **loss of vision** with a **traumatic brow injury** and **afferent pupillary defect** (absent direct reflex, normal consensual) suggests **traumatic optic neuropathy (TON)**.
- While the efficacy of corticosteroids is debated, high-dose intravenous corticosteroids, often following the **National Acute Spinal Cord Injury Study (NASCIS)** protocols (similar to spinal injury treatment), are a common initial treatment for TON, especially when administered within 6-8 hours of injury to reduce inflammation and edema around the optic nerve.
*Pulse methyl Prednisolone 250 mg four times daily for three days*
- This dosage regimen is a form of **pulse steroid therapy**, but the specific dose and frequency may not align with the standard high-dose IV corticosteroid protocols used for TON (e.g., typically 1g methylprednisolone daily).
- While corticosteroids are used, the precise protocol and optimal dosing for TON are critical and vary from this option.
*Emergency optic canal decompression*
- **Optic canal decompression surgery** is considered in cases of TON where there is direct compression of the optic nerve or a lack of response to corticosteroid therapy.
- It is not the initial treatment of choice for all TON cases and carries significant surgical risks; corticosteroid therapy is usually attempted first.
*Oral Prednisolone 1.5 mg/kg body weight*
- **Oral corticosteroids** are generally not sufficient for the acute, severe inflammation seen in traumatic optic neuropathy.
- **Intravenous administration** is preferred for its rapid and higher systemic bioavailability to achieve therapeutic levels at the optic nerve.
Ocular Trauma Indian Medical PG Question 3: A 20 year old man complains of difficulty in reading the newspaper with his right eye, three weeks after sustaining a gun shot injury to his left eye. The most likely diagnosis is:
- A. Optic nerve avulsion
- B. Sympathetic ophthalmia (Correct Answer)
- C. Delayed vitreous hemorrhage
- D. Macular edema
Ocular Trauma Explanation: ***Sympathetic ophthalmia***
- This is a rare, bilateral **granulomatous uveitis** occurring after penetrating trauma or surgery to one eye, with symptoms typically appearing weeks to months later in the **contralateral eye**.
- The delayed onset of visual difficulty in the uninjured right eye, following **gunshot injury** to the left eye three weeks prior, strongly points to an autoimmune reaction affecting both eyes.
*Optic nerve avulsion*
- This injury involves the complete or partial tearing of the **optic nerve** from the back of the globe, usually due to direct trauma to the eye.
- Symptoms would be immediate and severe vision loss in the **injured eye**, not delayed vision loss in the contralateral eye.
*Delayed vitreous hemorrhage*
- A delayed **vitreous hemorrhage** would cause sudden vision loss in the **injured eye** due to blood obscuring the visual axis.
- It would not explain the vision loss in the **contralateral, uninjured eye**.
*Macular edema*
- **Macular edema** can cause blurred or distorted vision, but it is typically a localized phenomenon, often resulting from inflammation, diabetes, or vascular occlusion.
- It would affect the **injured eye** as a direct consequence of trauma, not the contralateral eye in a delayed fashion and with the specific clinicopathological features of sympathetic ophthalmia.
Ocular Trauma Indian Medical PG Question 4: Following blunt trauma a young male presents with a D shaped pupil. What is the diagnosis?
- A. Iridodialysis (Correct Answer)
- B. Orbital fracture
- C. Traumatic hyphema
- D. Iridoschisis
Ocular Trauma Explanation: ***Iridodialysis***
- A **D-shaped pupil** strongly suggests **iridodialysis**, which is a disinsertion of the iris root from the ciliary body.
- This typically occurs after **blunt trauma** to the eye, allowing the pupil to be distorted towards the point of detachment.
*Orbital fracture*
- An orbital fracture often presents with **periorbital ecchymosis**, **diplopia**, **enophthalmos**, or **proptosis**, depending on the fracture location.
- While it results from blunt trauma, it doesn't directly cause a D-shaped pupil but can lead to other ocular complications.
*Traumatic hyphema*
- Traumatic hyphema is characterized by **blood in the anterior chamber** of the eye, which can be visible as a red fluid level.
- While caused by blunt trauma, it typically presents with blurred vision and pain, not a D-shaped pupil.
*Iridoschisis*
- Iridoschisis is a rare condition involving the **splitting of the iris stroma**, usually in the elderly, and is not typically associated with acute trauma or a D-shaped pupil.
- It often leads to **fine, detached iris fibers** floating in the anterior chamber, rather than a gross deformation of the pupil.
Ocular Trauma Indian Medical PG Question 5: Patients who need surgery within 24 hours are categorized under which color category in a disaster management triage?
- A. Green
- B. Yellow (Correct Answer)
- C. Blue
- D. Black
Ocular Trauma Explanation: ***Yellow***
- Patients in the **yellow category** are those who require **significant medical attention** and intervention, such as surgery, but whose condition is stable enough to withstand a delay of a few hours up to 24 hours without immediate threat to life or limb.
- This category indicates a **delayed but urgent need** for treatment, distinguishing them from immediate (red) or minor (green) cases.
*Blue*
- The color **blue** is generally **not a standard triage category** in most commonly used disaster protocols (e.g., START, JumpSTART).
- Triage systems typically use red, yellow, green, and black to prioritize patients based on immediate medical need and prognosis.
*Green*
- The **green category** is for patients with **minor injuries** who are considered "walking wounded" and can often wait for treatment for several hours, sometimes up to a few days.
- These individuals are **stable** and do not require immediate intervention to preserve life or limb.
*Black*
- The **black category** is reserved for individuals who are **deceased** or have injuries so severe that survival is unlikely given the available resources, often implying **palliative care** rather than active life-saving interventions in a mass casualty event.
- This category signifies that resources would be better allocated to patients with a higher chance of survival.
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