NEET-PG 2013 Practice Questions

Q: Which anesthetic agent is known for the fastest induction and recovery?

N2O. ***N2O*** - **Nitrous oxide** has a very **low blood-gas partition coefficient** (0.47), meaning it quickly saturates the blood and brain, leading to rapid induction and recovery. - Its **low solubility** allows for fast changes in anesthetic depth as it moves rapidly in and out of the bloodstream. *Desflurane* - While Desflurane also has a **low blood-gas partition coefficient** (0.42) and provides rapid induction and recovery, **N2O** is generally recognized as having the fastest kinetics. - Desflurane's volatility often requires a specialized heated vaporizer due to its **low boiling point**. *Halothane* - Halothane has a **higher blood-gas partition coefficient** (2.4) compared to N2O and desflurane, resulting in a slower induction and recovery time. - It is associated with potential **hepatotoxicity** (halothane hepatitis) and is no longer widely used. *Enflurane* - Enflurane has an intermediate **blood-gas partition coefficient** (1.9), making its induction and recovery slower than N2O, desflurane, and sevoflurane. - It can cause **seizures** at high concentrations and is also largely replaced by newer agents.

Q: In the context of obstructed labor, which maternal pelvic parameter is considered the most critical for successful delivery?

Diameter of pelvic inlet. ***Diameter of pelvic inlet*** - The **pelvic inlet** is typically the narrowest and most critical passage for the fetal head to engage and descend into the pelvis during labor. - An inadequate pelvic inlet diameter can lead to **cephalopelvic disproportion**, resulting in **obstructed labor** because the fetal head cannot enter the true pelvis. *Diameter of pelvic outlet* - While important for the final stages of labor, an inadequate **pelvic outlet** usually presents a problem only after the fetal head has successfully navigated the inlet and mid-pelvis. - Obstruction at the outlet is less common as the primary cause of prolonged or arrested first stage labor compared to an unyielding inlet. *Biparietal diameter* - The **biparietal diameter (BPD)** measures the widest transverse diameter of the fetal head, which is crucial but represents a fetal parameter. - While critical for assessing fetal head size in relation to the maternal pelvis, it is a fetal measurement, not a maternal pelvic parameter like the inlet. *Bitemporal diameter* - The **bitemporal diameter** is the shortest transverse diameter of the fetal head and is rarely the presenting issue in **obstructed labor**. - It is typically much smaller than the biparietal diameter and usually presents no obstacle to passage through the pelvis.

Q: All are true about constriction rings except which of the following?

Also known as Schroeder's ring.. ***Also known as Schroeder's ring.*** - This statement is **INCORRECT** and is the correct answer to this "except" question. - **Schroeder's ring** is NOT synonymous with constriction rings. Schroeder's ring is a **physiological retraction ring** at the junction of the upper and lower uterine segments, which is a normal finding. - **Constriction rings** are **pathological, localized spastic contractions** of the uterine muscle at any level, causing obstruction to fetal descent. They differ from Bandl's pathological retraction ring. *Can be caused by excessive use of oxytocin.* - **Excessive oxytocin** can lead to **uterine hyperstimulation** and **incoordinate uterine contractions**, which may result in the formation of constriction rings. - This is a known iatrogenic cause of pathological constriction rings during labor. *Ring can be palpated per abdomen* - **Constriction rings** can sometimes be palpated as a **depression or groove** on the uterine surface during abdominal examination when they are well-developed. - They present as localized areas of myometrial spasm that may be clinically detectable. *Inhalation of amyl nitrate can relax the ring.* - **Amyl nitrite** (or amyl nitrate) is a **smooth muscle relaxant** that can be used to relax uterine constriction rings. - It acts as a **vasodilator** and **uterine relaxant**, temporarily relieving the spastic contraction to facilitate delivery or manual manipulation.

Q: Oligomenorrhoea means ?

Cycle longer than 35 days. ***Cycle longer than 35 days*** - **Oligomenorrhea** is defined by menstrual cycles that are **infrequently occurring**, specifically lasting longer than 35 days. - This condition is distinct from **amenorrhea**, which is the complete absence of menstruation. *Cycle < 20 days* - A menstrual cycle lasting less than 20 days is considered **polymenorrhea**, indicating abnormally frequent menstruation. - This is the opposite of oligomenorrhea, which refers to infrequent menstruation. *Cycle more than 45 days* - While a cycle longer than 45 days would technically fall under **oligomenorrhea**, the general definition begins at an interval longer than **35 days**. - Cycles significantly longer than 45 days might also point to **amenorrhea**, depending on the exact duration and pattern. *Cycle more than 28 days* - A cycle lasting more than 28 days is within the **normal range** for many individuals, as the average cycle length is 21-35 days. - Therefore, this duration alone does **not define oligomenorrhea**.

Q: What is the recommended management for jaundice due to obstetric cholestasis in the third trimester?

Induction of labour at 38 weeks. ***Induction of labour at 38 weeks*** - **Obstetric cholestasis (Intrahepatic Cholestasis of Pregnancy)** is associated with increased risk of **stillbirth**, particularly beyond 37-38 weeks gestation. - Induction at **37-38 weeks** is recommended to balance reducing stillbirth risk while minimizing prematurity complications. - **Current practice**: Timing depends on **bile acid levels** - delivery at 37-38 weeks for bile acids >40 μmol/L, or 38-39 weeks for milder cases (19-39 μmol/L). - This option represents the standard management approach for most cases of obstetric cholestasis. *Induction of labour at 37 weeks* - Delivery at 37 weeks is also acceptable and increasingly preferred, particularly for **severe disease** (bile acids >40 μmol/L) or when there are additional risk factors. - Both 37 and 38 weeks are within the recommended window; the choice depends on **disease severity** and individual risk assessment. - This is not incorrect, but 38 weeks represents a slightly more conservative approach balancing risks. *Induction of labour at 42 weeks* - Waiting until 42 weeks significantly increases the risk of **intrauterine fetal death (IUFD)** in pregnancies complicated by obstetric cholestasis. - Prolonged exposure to **elevated bile acids** is toxic to the fetus and increases stillbirth risk, especially after 37-38 weeks. - This approach is **contraindicated** in obstetric cholestasis. *Wait for spontaneous labour* - Expectant management beyond 38 weeks is considered **unsafe** due to the unpredictable and progressive risk of **sudden intrauterine death**. - Active management with planned delivery at 37-38 weeks is the standard of care to prevent stillbirth. - Waiting for spontaneous labor exposes the fetus to unacceptable risks.

Q: Which type of fracture is most likely to cause exsanguinating blood loss?

Open femoral fracture. ***Open femoral fracture*** - An **open femoral fracture** involves both a break in the **femur** (the largest bone in the body, which houses significant marrow and has an extensive blood supply) and a break in the skin, allowing for direct external bleeding. - The **femur** can bleed up to **1-2 liters internally** even in a closed fracture, and an **open fracture** compounds this risk with direct external blood loss, leading to rapid exsanguination. *Closed tibial fracture* - A **closed tibial fracture** does not involve a break in the skin, so external bleeding is not a primary concern. - While there can be internal bleeding, the **tibia** is smaller than the femur and generally causes less significant blood loss (typically **250-500 mL**) compared to a femoral fracture. *Open humeral fracture* - An **open humeral fracture** involves exposure of the bone to the outside, but the **humerus** is a smaller bone with less marrow volume and blood supply compared to the femur. - While bleeding can be significant, especially if major vessels like the **brachial artery** are damaged, the overall potential for rapid, life-threatening **exsanguination** is less than with a femoral fracture. *Closed humeral fracture* - A **closed humeral fracture** does not involve a break in the skin, limiting blood loss to internal bleeding within the arm. - The **humerus** is a relatively smaller bone and, in a closed fracture, the surrounding tissues can tamponade some of the bleeding, making exsanguinating hemorrhage unlikely.

Q: Which of the following statements about hallucinations is true?

Perceived as real but without an external stimulus. ***Perceived as real but without an external stimulus*** - Hallucinations are defined by the perception of sensory experiences (e.g., seeing, hearing, feeling) that **feel real to the individual** but have **no corresponding external stimulus**. - This fundamental characteristic distinguishes them from other perceptual distortions like illusions. *There is misinterpretation of external stimulus* - This describes an **illusion**, where an actual external stimulus is misinterpreted (e.g., seeing a coat in the dark and believing it's a person). - Hallucinations occur in the **absence of any external stimulus**, making this statement incorrect for defining hallucinations. *Can be controlled by voluntary effort* - Hallucinations, being involuntary sensory experiences, are generally **not amenable to conscious control** or suppression by the individual experiencing them. - The lack of voluntary control is a key feature distinguishing them from imagination or fantasy. *Always indicates severe mental illness* - While often associated with severe mental illnesses like **schizophrenia**, hallucinations can also occur due to various other causes, including **substance intoxication or withdrawal**, neurological conditions (e.g., delirium, Parkinson's disease), or even during periods of extreme fatigue or stress. - Therefore, stating they *always* indicate severe mental illness is inaccurate.

Q: A student unable to deliver speech before an audience is suffering from?

Social anxiety disorder. ***Social anxiety disorder*** - This condition involves an intense, persistent fear of social situations, particularly those where one might be scrutinized or judged by others. - Public speaking is a classic scenario that can trigger significant distress and avoidance in individuals with **social anxiety disorder**. *Fear of open spaces* - This symptom describes **agoraphobia**, which is an anxiety disorder characterized by fear and avoidance of situations or places that might cause panic, helplessness, or embarrassment, often due to a perceived inability to escape. - While it can sometimes involve fear of public gatherings, its core is about escape/safety from open, unfamiliar, or overwhelming spaces, not specifically about performance. *Fear of enclosed spaces* - This refers to **claustrophobia**, which is an anxiety disorder characterized by an irrational fear of confined spaces. - It does not involve the fear of speaking or performance before an audience. *Obsessive Compulsive Disorder* - **OCD** is characterized by recurrent and persistent thoughts (obsessions) and/or repetitive behaviors or mental acts (compulsions) performed to reduce anxiety. - It does not typically manifest as an inability to deliver a speech before an audience unless the obsessions or compulsions directly interfere with such an activity, which is not the primary mechanism of this symptom.

Q: Who is known as the father of modern psychiatry?

Philippe Pinel. ***Philippe Pinel*** - **Philippe Pinel** is widely regarded as the **father of modern psychiatry** due to his revolutionary reforms in the treatment of the mentally ill in the late 18th and early 19th centuries - He advocated for a more humane approach, removing chains from patients and emphasizing **moral treatment**, which laid the foundation for modern psychiatric care - His work at Bicêtre Hospital (1793) and Salpêtrière Hospital marked a paradigm shift from custodial care to therapeutic intervention *Bleuler* - **Eugen Bleuler** is known for coining the term **"schizophrenia"** (1911) and describing its fundamental symptoms (the "four A's": associations, affect, ambivalence, autism) - While his contributions were significant in understanding and classifying mental illness, he built upon the foundations of humane psychiatric care already laid by Pinel *Freud* - **Sigmund Freud** is considered the **father of psychoanalysis**, a distinct therapeutic approach and theory of personality - His work focused on the unconscious mind, defense mechanisms, and psychosexual development, which are central to psychoanalytic theory but not the foundational shift in psychiatric care management that Pinel initiated *Kraepelin* - **Emil Kraepelin** is often referred to as the **father of modern psychiatric classification** due to his systematic approach to categorizing mental disorders based on their clinical course and outcome (dementia praecox vs manic-depressive illness) - His work profoundly influenced the development of diagnostic manuals like the DSM, but his focus was on nosology and classification rather than the initial humane treatment reform

Question 1

Which anesthetic agent is known for the fastest induction and recovery?

Accepted Answer

N2O

Answer

Halothane

Answer

Enflurane

Answer

Desflurane

Question 2

A 25-year-old patient presents with chronic itchy, erythematous skin lesions on the flexural areas that have been recurring since childhood. The patient has a family history of asthma. Which of the following is the most important diagnostic criterion for the most likely diagnosis?

Accepted Answer

Chronic pruritic eczema with typical morphology and distribution

Answer

Personal or family history of atopy

Answer

Elevated serum IgE levels

Answer

Early age of onset (before 2 years)

Question 3

In the context of obstructed labor, which maternal pelvic parameter is considered the most critical for successful delivery?

Accepted Answer

Diameter of pelvic inlet

Answer

Biparietal diameter

Answer

Bitemporal diameter

Answer

Diameter of pelvic outlet

Question 4

All are true about constriction rings except which of the following?

Accepted Answer

Also known as Schroeder's ring.

Answer

Can be caused by excessive use of oxytocin.

Answer

Ring can be palpated per abdomen

Answer

Inhalation of amyl nitrate can relax the ring.

Question 5

Oligomenorrhoea means ?

Accepted Answer

Cycle longer than 35 days

Answer

Cycle < 20 days

Answer

Cycle more than 45 days

Answer

Cycle more than 28 days

Question 6

What is the recommended management for jaundice due to obstetric cholestasis in the third trimester?

Accepted Answer

Induction of labour at 38 weeks

Answer

Induction of labour at 37 weeks

Answer

Induction of labour at 42 weeks

Answer

Wait for spontaneous labour

Question 7

Which type of fracture is most likely to cause exsanguinating blood loss?

Accepted Answer

Open femoral fracture

Answer

Closed tibial fracture

Answer

Open humeral fracture

Answer

Closed humeral fracture

Question 8

Which of the following statements about hallucinations is true?

Accepted Answer

Perceived as real but without an external stimulus

Answer

There is misinterpretation of external stimulus

Answer

Can be controlled by voluntary effort

Answer

Always indicates severe mental illness

Question 9

A student unable to deliver speech before an audience is suffering from?

Accepted Answer

Social anxiety disorder

Answer

Fear of open spaces

Answer

Fear of enclosed spaces

Answer

Obsessive Compulsive Disorder

Question 10

Who is known as the father of modern psychiatry?

Accepted Answer

Philippe Pinel

Answer

Bleuler

Answer

Freud

Answer

Kraepelin

NEET-PG 2013

Anesthesiology

Dermatology

Obstetrics and Gynecology

Orthopaedics

Psychiatry