NEET-PG 2014 — ENT

Q: In air blast injury, which is the most commonly affected organ? CMC (Vellore) 07; AI 09; AIIMS 10; NEET 14

Eardrum. ***Eardrum*** - The **eardrum (tympanic membrane)** is the most commonly affected organ in air blast injuries due to its thin, delicate structure and direct exposure to pressure waves. - Its rupture threshold is relatively low, making it highly susceptible to damage from sudden changes in air pressure. *Stomach* - While **hollow organs** like the stomach can be affected by blast injuries (secondary to barotrauma), they are less commonly ruptured than the eardrum. - Injury to the stomach generally requires a higher intensity blast or immersion in water. *Lungs* - **Pulmonary barotrauma** (blast lung) is a serious consequence of blast injury, characterized by hemorrhage, edema, and contusions. - However, the eardrum is far more frequently (and often mildly) injured compared to severe lung damage. *Liver* - The **liver**, being a solid organ, is generally more resistant to direct blast effects compared to hollow or air-filled structures. - Liver injuries from blast are more often due to secondary trauma (e.g., impact from flying debris) rather than the primary blast wave itself. [Practice more ENT PYQs on OnCourse]

Q: Rinne test is:

A tuning fork test for hearing assessment. ***A tuning fork test for hearing assessment*** - The **Rinne test** is a well-established otological examination that uses a **tuning fork** (typically 512 Hz) to compare **air conduction (AC)** and **bone conduction (BC)** hearing. - Normal result shows **air conduction > bone conduction** (positive Rinne test), while **conductive hearing loss** shows bone conduction > air conduction (negative Rinne test). *Not a recognized medical term* - This is completely false. The **Rinne test** is a widely recognized and standard medical diagnostic test in **otolaryngology** and **audiology**. - It has been used clinically for over a century and is taught in medical schools worldwide, named after **Heinrich Adolf Rinne**, a German otologist who described it in 1855. *A clinical examination technique for tympanic membrane* - While the Rinne test is part of ear examination, it does not directly examine the **tympanic membrane**. - The test assesses **hearing pathways** rather than directly visualizing or examining the tympanic membrane structure; direct examination is done through **otoscopy**. *A type of audiometry test* - **Audiometry** refers to formal, quantitative hearing tests using specialized electronic equipment that produce **audiograms** with detailed hearing threshold measurements. - The Rinne test is a simple, qualitative **bedside test** using a tuning fork that provides a quick comparison between air and bone conduction, but does not produce numerical thresholds or detailed audiometric data. [Practice more ENT PYQs on OnCourse]

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In air blast injury, which is the most commonly affected organ? CMC (Vellore) 07; AI 09; AIIMS 10; NEET 14

Rinne test is:

NEET-PG 2014 - ENT NEET-PG Practice Questions and MCQs

Question 1: In air blast injury, which is the most commonly affected organ? CMC (Vellore) 07; AI 09; AIIMS 10; NEET 14

A. Stomach
B. Lungs
C. Liver
D. Eardrum (Correct Answer)

Explanation: ***Eardrum*** - The **eardrum (tympanic membrane)** is the most commonly affected organ in air blast injuries due to its thin, delicate structure and direct exposure to pressure waves. - Its rupture threshold is relatively low, making it highly susceptible to damage from sudden changes in air pressure. *Stomach* - While **hollow organs** like the stomach can be affected by blast injuries (secondary to barotrauma), they are less commonly ruptured than the eardrum. - Injury to the stomach generally requires a higher intensity blast or immersion in water. *Lungs* - **Pulmonary barotrauma** (blast lung) is a serious consequence of blast injury, characterized by hemorrhage, edema, and contusions. - However, the eardrum is far more frequently (and often mildly) injured compared to severe lung damage. *Liver* - The **liver**, being a solid organ, is generally more resistant to direct blast effects compared to hollow or air-filled structures. - Liver injuries from blast are more often due to secondary trauma (e.g., impact from flying debris) rather than the primary blast wave itself.

Question 2: Rinne test is:

A. A clinical examination technique for tympanic membrane
B. A type of audiometry test
C. Not a recognized medical term
D. A tuning fork test for hearing assessment (Correct Answer)

Explanation: ***A tuning fork test for hearing assessment*** - The **Rinne test** is a well-established otological examination that uses a **tuning fork** (typically 512 Hz) to compare **air conduction (AC)** and **bone conduction (BC)** hearing. - Normal result shows **air conduction > bone conduction** (positive Rinne test), while **conductive hearing loss** shows bone conduction > air conduction (negative Rinne test). *Not a recognized medical term* - This is completely false. The **Rinne test** is a widely recognized and standard medical diagnostic test in **otolaryngology** and **audiology**. - It has been used clinically for over a century and is taught in medical schools worldwide, named after **Heinrich Adolf Rinne**, a German otologist who described it in 1855. *A clinical examination technique for tympanic membrane* - While the Rinne test is part of ear examination, it does not directly examine the **tympanic membrane**. - The test assesses **hearing pathways** rather than directly visualizing or examining the tympanic membrane structure; direct examination is done through **otoscopy**. *A type of audiometry test* - **Audiometry** refers to formal, quantitative hearing tests using specialized electronic equipment that produce **audiograms** with detailed hearing threshold measurements. - The Rinne test is a simple, qualitative **bedside test** using a tuning fork that provides a quick comparison between air and bone conduction, but does not produce numerical thresholds or detailed audiometric data.