Accuracy and Validation Studies — MCQs
What surgery is shown here in the image?
An RTA patient presented to the emergency department with severe pain in the ankle. An X-ray was performed, given below. What is the best next step in management?
Which of the following stages of Breast Cancer corresponds to the following features: a breast mass of 6 x 3 cm, ipsilateral supraclavicular lymph node involvement, and distant metastasis that cannot be assessed?
The operative procedure known as "microfracture" is done for the
Not true about Screw feed technique is
Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -
You are suturing a laceration in the ER using the interrupted suturing technique. What is the angle of needle placement?
A child presented to an orthopaedic clinic with a limp. The surgeon suspected him to have a fixed flexion deformity of the hip. Which test should the surgeon perform to confirm his finding?
Shortest functional level of trans tibial amputation is:
A radiograph is obtained from a child with scoliosis. What is the name of the angle used to measure spinal curvature?
Accuracy and Validation Studies Indian Medical PG Practice Questions and MCQs
Question 1: What surgery is shown here in the image?
- A. Hemorrhoidectomy
- B. Altemeier operation
- C. Wells procedure
- D. Thiersch wiring (Correct Answer)
Explanation: ***Thiersch wiring*** - The image clearly depicts a **suture or wire** placed circumferentially around the anus to reduce its caliber, which is the hallmark of a **Thiersch procedure**. - This technique is used to treat **anal incontinence** by constricting the anal opening and improving sphincter function. *Hemorrhoidectomy* - This procedure involves the **surgical removal of hemorrhoids** and the images do not show any identifiable hemorrhoidal tissue being excised. - While bleeding and prolapse can be associated with hemorrhoids, the depicted technique with circumferential wiring is not used for their removal. *Altemeier operation* - The Altemeier operation is a type of **perineal rectosigmoidectomy** for rectal prolapse that involves resecting the prolapsed segment of the rectum. - The image does not illustrate resection of rectal tissue; instead, it shows a constricting device around the anus. *Wells procedure* - The Wells procedure, or **rectopexy**, involves anchoring the rectum to the sacrum to correct rectal prolapse. - This procedure typically involves an abdominal approach and fixation techniques, which are not represented in the illustration.
Question 2: An RTA patient presented to the emergency department with severe pain in the ankle. An X-ray was performed, given below. What is the best next step in management?
- A. Neurovascular Assessment and Closed reduction with slab application (Correct Answer)
- B. Neurovascular Assessment and Closed reduction with cast application
- C. Neurovascular Assessment and Immediate surgery
- D. Neurovascular Assessment and Immediate open reduction
Explanation: ***Neurovascular Assessment and Closed reduction with slab application*** - The X-ray shows an **ankle dislocation without an obvious fracture**, making **closed reduction** the appropriate initial treatment. - A **slab (splint)** is preferred over a full cast initially for acute injuries to accommodate for swelling, reducing the risk of compartment syndrome, and allowing for serial neurovascular checks. *Neurovascular Assessment and Closed reduction with cast application* - While closed reduction is correct, applying a **full cast** immediately after an acute injury carries a risk of **compartment syndrome** due to potential swelling that cannot be accommodated by a rigid cast. - A cast would typically be applied after the initial swelling has subsided, usually a few days to a week after initial reduction and splinting. *Neurovascular Assessment and Immediate surgery* - **Immediate surgery** is generally reserved for **open fractures/dislocations**, dislocations that cannot be reduced closed (irreducible dislocations), or those with significant associated fractures that require surgical fixation to stabilize the joint. - In this case, the dislocation appears to be isolated and amenable to closed reduction, making surgery not the immediate next step. *Neurovascular Assessment and Immediate open reduction* - **Open reduction** is performed when closed reduction fails or is contraindicated, for example, due to soft tissue interposition or highly unstable fracture patterns. - Since closed reduction has not yet been attempted, immediate open reduction is premature and unnecessary for an apparently simple dislocation.
Question 3: Which of the following stages of Breast Cancer corresponds to the following features: a breast mass of 6 x 3 cm, ipsilateral supraclavicular lymph node involvement, and distant metastasis that cannot be assessed?
- A. T4 N3 MX
- B. T4 N1 M1
- C. T4 N0 M0
- D. T3 N3c MX (Correct Answer)
Explanation: ***T3 N3c MX*** - A **breast mass of 6 x 3 cm** indicates a T3 tumor (tumor size > 5 cm). - **Ipsilateral supraclavicular lymph node involvement** is classified as N3c disease. **Distant metastasis that cannot be assessed** is denoted by MX. *T4 N3 MX* - A **T4 classification** is reserved for tumors with direct extension to the chest wall or skin, or inflammatory breast cancer, which is not mentioned here. - While N3c and MX are correct for the nodal and metastatic status, the T stage is inaccurate based on the provided tumor size. *T4 N1 M1* - A **T4 classification** is incorrect as the mass size alone (6 x 3 cm) does not meet T4 criteria. - **N1** denotes involvement of 1-3 axillary lymph nodes, which is less extensive than supraclavicular involvement (N3c). **M1** indicates confirmed distant metastasis, but the question states it "cannot be assessed" (MX). *T4 N0 M0* - **T4** is incorrect, as this stage is for direct chest wall/skin involvement or inflammatory breast cancer. - **N0** signifies no regional lymph node metastasis, contradicting the presence of supraclavicular lymph node involvement. **M0** indicates no distant metastasis, whereas the question specifies it cannot be assessed (MX).
Question 4: The operative procedure known as "microfracture" is done for the
- A. Delayed union of femur
- B. Osteochondral defect of femur (Correct Answer)
- C. Non union of tibia
- D. Loose bodies of ankle joint
Explanation: ***Osteochondral defect of femur*** - **Microfracture** is a surgical technique used to stimulate the growth of **fibrocartilage** in areas of damaged articular cartilage, such as an **osteochondral defect**. - It involves creating small holes in the **subchondral bone** to allow stem cells and growth factors from the bone marrow to form a new reparative tissue. *Delayed union of femur* - **Delayed union** typically involves an extended time for fracture healing, which is often managed through prolonged immobilization, **bone grafting**, or sometimes revision surgery. - Microfracture specifically targets cartilage repair, not the process of **bony union** after a fracture. *Non union of tibia* - **Non-union** refers to the failure of a fractured bone to heal within a reasonable timeframe, often requiring surgical intervention with **bone grafts** or **internal fixation**. - This condition involves bone healing problems, distinct from cartilage defects that microfracture addresses. *Loose bodies of ankle joint* - **Loose bodies** in a joint are typically removed surgically, often arthroscopically, to relieve pain and prevent joint damage. - This procedure does not involve the repair of cartilage defects, which is the primary goal of microfracture.
Question 5: Not true about Screw feed technique is
- A. Based on non-burn thermal treatment
- B. 80% volume reduction
- C. Weight is decreased by 20-30%
- D. Pathological waste is removed (Correct Answer)
Explanation: ***Pathological waste is removed*** - The screw feed technique **cannot adequately treat pathological waste** (human tissues, organs, body parts). - According to **Biomedical Waste Management Rules**, pathological waste requires **incineration or deep burial**, not just steam sterilization and compaction. - This statement is **NOT TRUE** - screw feed systems are designed for infectious waste, sharps, and other categories, **not pathological waste**. *Based on non-burn thermal treatment* - The screw feed technique utilizes **steam and pressure** for sterilization, which is a form of **non-burn thermal treatment**. - This process **inactivates pathogens** without incineration, making it an environmentally friendly alternative for appropriate waste categories. *80% volume reduction* - The screw feed system effectively compacts treated medical waste, achieving a significant **volume reduction of approximately 80%**. - This high level of compaction reduces storage space requirements and lowers transportation costs. *Weight is decreased by 20-30%* - Steam treatment **dehydrates the waste**, resulting in a **20-30% reduction in weight**. - This weight decrease further optimizes waste handling and disposal logistics.
Question 6: Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -
- A. NIBP
- B. ECG
- C. Pulse oximeter
- D. TEE (Correct Answer)
Explanation: ***TEE*** - **Transesophageal echocardiography (TEE)** is the most sensitive method for detecting perioperative myocardial ischemia because it can visualize **regional wall motion abnormalities** and changes in **ventricular function** much earlier than ECG. - **Ischemia** directly impairs the contractility of the affected myocardium, leading to subtle changes in wall motion that TEE can identify. *NIBP* - **Non-invasive blood pressure (NIBP)** monitoring can detect **hemodynamic changes** (like hypotension or hypertension) that may precede or accompany ischemia. - However, these changes are **non-specific** and occur relatively late, making NIBP a less sensitive indicator of early ischemia. *ECG* - **Electrocardiography (ECG)** monitors the electrical activity of the heart and can detect **ST-segment changes** indicative of ischemia. - While useful, ECG changes may appear later than wall motion abnormalities, and **silent ischemia** can be missed if the leads are not optimally placed or if the ischemia does not produce significant electrical changes. *Pulse oximeter* - A **pulse oximeter** measures **oxygen saturation** in the peripheral blood. - It is primarily used to assess **respiratory function** and tissue oxygenation, and it does not directly monitor myocardial ischemia or cardiac function.
Question 7: You are suturing a laceration in the ER using the interrupted suturing technique. What is the angle of needle placement?
- A. 80 degrees
- B. 70 degrees
- C. 60 degrees
- D. 90 degrees (Correct Answer)
Explanation: ***90 degrees*** - Placing the needle at a **90-degree angle** to the skin surface ensures that the suture comes out perpendicular to the skin edge, creating an **eversion of the wound edges**. - This perpendicular entry allows for an equal amount of tissue to be grasped on both sides of the wound, promoting proper **wound approximation** and healing. *80 degrees* - An 80-degree angle, while close, would not provide the ideal **perpendicular entry** needed to properly evert the wound edges. - This slight deviation from 90 degrees could lead to less precise **tissue approximation** and potentially an inverted wound edge. *70 degrees* - A 70-degree angle is too shallow and would result in the suture entering the wound more tangentially, leading to **inverted wound edges**. - **Inverted wound edges** hinder optimal healing and can result in a less aesthetically pleasing scar. *60 degrees* - A 60-degree angle is significantly too shallow, which would cause the suture to be placed too superficially and horizontally, resulting in **poor wound edge eversion**. - This angle would make it difficult to adequately appose the deeper dermal layers, compromising **tensile strength** and increasing the risk of scar formation.
Question 8: A child presented to an orthopaedic clinic with a limp. The surgeon suspected him to have a fixed flexion deformity of the hip. Which test should the surgeon perform to confirm his finding?
- A. Thomas test (Correct Answer)
- B. Trendelenburgs test
- C. Telescoping test
- D. Nelaton's test
Explanation: ***Thomas test*** - The **Thomas test** is specifically designed to detect a **fixed flexion deformity of the hip**, where the hip cannot fully extend. - During the test, the patient's hip is flexed to flatten the lumbar spine, and if the contralateral leg then rises off the table, it indicates a fixed flexion deformity. *Trendelenburg's test* - The **Trendelenburg's test** assesses the strength and function of the **hip abductor muscles**, primarily the gluteus medius. - A positive result indicates weakness of the abductors on the standing leg, causing the pelvis to drop on the unsupported side, which is unrelated to fixed flexion deformity. *Nelaton's test* - **Nelaton's test** is used to determine the relative position of the **greater trochanter** in relation to the **ischial tuberosity** and **anterior superior iliac spine (ASIS)**, primarily in cases of hip dislocation or fracture. - It would not specifically identify a fixed flexion deformity of the hip joint itself. *Telescoping test* - The **telescoping test** is used to evaluate for hip instability, particularly in infants with **developmental dysplasia of the hip (DDH)**. - It involves applying axial pressure to the femur while moving the hip, assessing for abnormal movement of the femoral head within the acetabulum, and does not directly detect fixed flexion deformity.
Question 9: Shortest functional level of trans tibial amputation is:
- A. Just proximal to tibial tuberosity
- B. 15 cm distal to joint line
- C. 10 cm distal to joint line
- D. Just distal to tibial tuberosity (Correct Answer)
Explanation: **Just distal to tibial tuberosity** - This level allows for a **short residual limb** but still provides sufficient leverage for effective prosthetic control and weight-bearing. - Amputations at this level generally preserve the **knee joint**, which is crucial for maximizing function and ambulation. *Just proximal to tibial tuberosity* - An amputation **proximal to the tibial tuberosity** would result in a **knee disarticulation** or above-knee amputation, leading to a much greater functional deficit. - This level means losing the **knee joint**, which is not considered a trans-tibial amputation. *15 cm distal to joint line* - This level of amputation would result in a **longer residual limb** than necessary, which can be beneficial, but it's not the *shortest functional* level. - While functional, a longer limb might sometimes present challenges with prosthetic fit or bulk in certain situations. *10 cm distal to joint line* - Similar to 15 cm distal, this length is considered a **standard or optimal length** for trans-tibial amputations, resulting in good function. - However, it is not the **shortest possible functional level** while still retaining an effective limb for prosthetic use.
Question 10: A radiograph is obtained from a child with scoliosis. What is the name of the angle used to measure spinal curvature?
- A. Bohler's Angle
- B. Ferguson's Angle
- C. Cobb's Angle (Correct Answer)
- D. Pauwels' Angle
Explanation: **Cobb's Angle** - **Cobb's angle** is the primary method for measuring the severity of **scoliosis** on radiographs. - It is measured by drawing lines parallel to the superior endplate of the most tilted superior vertebra and the inferior endplate of the most tilted inferior vertebra of the curve; the angle between these two lines (or their perpendiculars) is the Cobb angle. *Bohler's Angle* - **Bohler's angle** is used in the assessment of **calcaneus fractures** and is measured on a lateral foot radiograph. - A decrease in this angle is indicative of a calcaneal fracture. *Ferguson's Angle* - **Ferguson's angle**, also known as the lumbosacral angle, measures the inclination of the sacrum relative to the horizontal in the standing position. - It is primarily used in the assessment of **spondylolisthesis** and other lumbosacral conditions. *Pauwels' Angle* - **Pauwels' angle** is used to classify **femoral neck fractures** based on the angle of the fracture line relative to the horizontal. - It helps determine the severity and stability of femoral neck fractures, guiding treatment decisions.
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