Assistive Devices for Mobility — MCQs
Amputation is often not required in:
Which activity will be difficult to perform for a patient with an anterior cruciate deficient knee joint?
The kinetic energy of the body is least in one of the following phases of the walking cycle
Which of the following is the platinum-based chemotherapeutic agent used as first-line treatment for ovarian carcinoma?
While using axillary crutches, elbow should be flexed to:
Mobile Medical Units (MMUs) under government health programs can operate through different models. Which of the following statements about MMU operations are correct? 1. MMUs are run by the government 2. MMUs are run by external agencies with medical supplies given by the government 3. MMUs are run by the government and medical supplies are also given by the government 4. MMUs are run by external agencies and medical supplies are also given by the external agency
The test performed below shows involvement of which of the following nerve?
Which of the following statement(s) is/are true?
The Milwaukee brace is used in the treatment of which of the following conditions?
Taylor's Brace is used for which of the following?
Assistive Devices for Mobility Indian Medical PG Practice Questions and MCQs
Question 1: Amputation is often not required in:
- A. Buerger's
- B. Chronic osteomyelitis (Correct Answer)
- C. Diabetic gangrene
- D. Gas gangrene
Explanation: ***Chronic osteomyelitis*** - While chronic osteomyelitis can be severe, advancements in **antibiotic therapy**, **surgical debridement**, and **reconstructive procedures** often allow for limb salvage. - The goal of treatment is to eradicate infection and preserve function, making amputation a last resort when other methods fail to control infection or restore viability. *Buerger's* - **Buerger's disease** (thromboangiitis obliterans) is characterized by inflammation and thrombosis of small and medium-sized arteries and veins, primarily in the limbs, leading to severe ischemia and gangrene. - Due to progressive vascular damage and frequent lack of effective medical treatment for advanced stages, **amputation is often required** to remove necrotic tissue and manage intractable pain. *diabetic gangrene* - **Diabetic gangrene** results from a combination of **peripheral neuropathy**, **peripheral arterial disease**, and **infection**, leading to tissue death, particularly in the feet. - The compromised blood supply and impaired wound healing in diabetic patients make these lesions prone to rapid progression and severe infection, with **amputation frequently necessary** to prevent systemic sepsis and death. *Gas gangrene* - **Gas gangrene** is a rapidly progressive and life-threatening infection caused by *Clostridium* species, which produce toxins and gas within tissues. - Due to its aggressive and destructive nature, requiring immediate and extensive surgical debridement often involving **amputation of the affected limb** to remove all infected tissue and prevent widespread systemic toxicity.
Question 2: Which activity will be difficult to perform for a patient with an anterior cruciate deficient knee joint?
- A. Getting up from a sitting position
- B. Walk downhill (Correct Answer)
- C. Walk uphill
- D. Sitting cross-legged
Explanation: ***Walk downhill*** - An **anterior cruciate ligament (ACL) deficient knee** experiences anterior tibial translation, especially when the muscles can't compensate, leading to instability. - Walking downhill places higher **anterior shear forces** on the knee joint and often involves knee extension or hyperextension, which dramatically increases the risk of the tibia translating anteriorly relative to the femur. *Getting up from a sitting position* - This activity primarily involves **quadriceps muscle contraction** and a concentric movement of the knee, which stabilizes the joint. - It does not typically place significant **anterior shear stress** on the ACL, even in a deficient knee. *Walk uphill* - Walking uphill often involves knee flexion and places the knee in a more protected position against **anterior tibial translation**. - The quadriceps and hamstrings work synergistically to **stabilize the joint** during this motion, reducing stress on the ACL. *Sitting cross-legged* - This position primarily involves **hip and knee flexion and external rotation**, but it is generally a static and non-weight-bearing position. - It does not impose significant **dynamic loads** or shear forces that would cause instability in an ACL-deficient knee.
Question 3: The kinetic energy of the body is least in one of the following phases of the walking cycle
- A. Double support
- B. Mid-stance (Correct Answer)
- C. Toe-off
- D. Heel strike
Explanation: ***Mid-stance*** - During **mid-stance**, the body's center of gravity is at its **highest point**, and the vertical velocity is near zero as the body transitions from upward to downward motion, contributing to **reduced kinetic energy**. - At this phase, forward velocity is relatively constant but the body is at the apex of its vertical trajectory, representing a point of **minimal total kinetic energy** in the sagittal plane. - The body transitions from deceleration to acceleration, with the limb providing stable support as weight passes over the stance foot. *Double support* - In **double support**, both feet are on the ground during the weight transfer phase, and the body's center of gravity is at a lower position compared to mid-stance. - While some energy is dissipated during weight transfer, this phase involves active muscular work and forward momentum maintenance, with kinetic energy being variable. - This represents a transition phase between single support periods, with complex energy exchanges occurring. *Toe-off* - At **toe-off**, the propulsive phase of gait, the body is generating forward momentum with peak forward velocity, meaning there is **significant kinetic energy** as the foot pushes off the ground. - The body's center of gravity is moving upwards and forwards, indicating a higher kinetic energy state. - Ankle plantarflexors are actively propelling the body forward, maximizing kinetic energy output. *Heel strike* - **Heel strike** is a moment of initial contact where the body's forward velocity is still considerable, possessing **significant kinetic energy**. - The limb is preparing to absorb impact forces while the body's center of mass continues moving forward, representing high kinetic energy just before the deceleration phase. - This marks the beginning of the stance phase with substantial horizontal velocity maintained from the swing phase.
Question 4: Which of the following is the platinum-based chemotherapeutic agent used as first-line treatment for ovarian carcinoma?
- A. Cyclophosphamide
- B. Methotrexate
- C. Cisplatin (Correct Answer)
- D. Dacarbazine
Explanation: ***Cisplatin*** - **Cisplatin** is a platinum-based chemotherapy drug that forms **DNA cross-links**, inhibiting DNA synthesis and leading to the death of rapidly dividing cells, making it highly effective against **ovarian carcinoma**. - It is a cornerstone of chemotherapy regimens for ovarian cancer, often used in combination with other agents such as paclitaxel. *Methotrexate* - **Methotrexate** is an **antimetabolite** that inhibits dihydrofolate reductase, thereby interfering with DNA synthesis. - While it is used in various cancers like leukemia, lymphoma, and some solid tumors (e.g., breast cancer, gestational trophoblastic disease), it is **not a primary recommended drug for ovarian carcinoma**. *Cyclophosphamide* - **Cyclophosphamide** is an **alkylating agent** that causes DNA damage, leading to cell death. - It is used in many cancers, including lymphoma, breast cancer, and some leukemias, but it is **not a first-line or primary agent for ovarian carcinoma** in contemporary treatment guidelines. *Dacarbazine* - **Dacarbazine** is an **alkylating agent** primarily used in the treatment of **malignant melanoma** and Hodgkin lymphoma. - It is **not indicated for the treatment of ovarian carcinoma**.
Question 5: While using axillary crutches, elbow should be flexed to:
- A. 30 degrees (Correct Answer)
- B. 20 degrees
- C. 10 degrees
- D. 40 degrees
Explanation: ***30 degrees*** - A **30-degree elbow flexion** allows for proper weight bearing through the hands and prevents injury to the **axillary nerves and blood vessels**. - This angle provides the best mechanical advantage for stability and ambulation with **axillary crutches**. *20 degrees* - This degree of flexion is typically **insufficient** and would lead to the crutches being too high, potentially causing **axillary nerve compression**. - It would also make it harder to bear weight through the hands effectively. *10 degrees* - This flexion is **too small**, indicating the crutches are too long, which increases the risk of **axillary nerve damage** and poor balance. - The patient would have difficulty generating the necessary force to move forward. *40 degrees* - This degree of flexion means the crutches are **too short**, forcing the patient to bend excessively and leading to **poor posture** and increased exertion. - It would also compromise stability and could cause wrist pain due to excessive wrist extension.
Question 6: Mobile Medical Units (MMUs) under government health programs can operate through different models. Which of the following statements about MMU operations are correct? 1. MMUs are run by the government 2. MMUs are run by external agencies with medical supplies given by the government 3. MMUs are run by the government and medical supplies are also given by the government 4. MMUs are run by external agencies and medical supplies are also given by the external agency
- A. 1, 2, 3, and 4
- B. 1 and 2
- C. 1, 2, and 3 (Correct Answer)
- D. Only 1
Explanation: ***1, 2, and 3*** - This option correctly identifies the flexible operational models of **Mobile Medical Units (MMUs)** under government health programs. - MMUs can be directly managed by the **government**, managed by **external agencies** with government-provided supplies, or managed by the government with **government-provided supplies**. *1, 2, 3, and 4* - This option incorrectly includes the scenario where MMUs are run by **external agencies** and medical supplies are also provided by the **external agency**. - While external agencies can run MMUs, government health programs typically ensure that essential medical supplies are provided or funded by the **government** to maintain standardization and accessibility. *1 and 2* - This option is incomplete as it misses the model where both the MMU operation and medical supplies are provided by the **government** (statement 3). - Government health programs often have fully integrated models, especially in remote areas. *Only 1* - This option is too restrictive, as it only includes the model where MMUs are run by the **government**. - MMUs often involve partnerships with **external agencies** for operational efficiency or specialized services.
Question 7: The test performed below shows involvement of which of the following nerve?
- A. Radial nerve
- B. Axillary nerve
- C. Median nerve (Correct Answer)
- D. Ulnar nerve
Explanation: ***Median nerve*** - The image depicts the **Phalen's test**, where prolonged forced wrist flexion compresses the **median nerve** within the **carpal tunnel**. - The lightning bolt symbol indicates the characteristic **paresthesia** (tingling, numbness) experienced in the distribution of the median nerve, affecting the **thumb, index finger, middle finger, and radial half of the ring finger**. *Radial nerve* - The **radial nerve** primarily innervates the **extensor muscles** of the forearm and hand and provides sensation to the posterior aspect of the forearm and hand, as well as the dorsal side of the lateral 3.5 digits; it is not compressed by Phalen's maneuver. - Injury to the radial nerve typically causes **wrist drop** and sensory loss in a different distribution. *Axillary nerve* - The **axillary nerve** innervates the **deltoid** and **teres minor** muscles and provides sensation over the lateral shoulder. - It is not involved in conditions affecting the wrist or hand tested by maneuvers like Phalen's. *Ulnar nerve* - The **ulnar nerve** provides sensation to the **little finger** and **ulnar half of the ring finger**, and innervates most of the intrinsic hand muscles. - Compression of the ulnar nerve is typically tested by **Tinel's sign** at the **cubital tunnel** or Guyon's canal, not Phalen's test.
Question 8: Which of the following statement(s) is/are true?
- A. Normally the radial styloid is 1/2 lower than the ulnar
- B. Dinner fork deformity is characteristic of Colles' fracture (Correct Answer)
- C. All of the options
- D. Oedema & tenderness over the anatomical snuffbox is the characteristic features of Fracture of the scaphoid
Explanation: **Dinner fork deformity is characteristic of Colles' fracture** - **Colles' fracture** involves a **dorsal displacement** and angulation of the distal radius, creating a characteristic **"dinner fork" or "bayonet" deformity** of the wrist. - This specific deformity is a classic clinical sign that aids in the diagnosis of a Colles' fracture, which is an **extra-articular fracture** of the distal radius with dorsal angulation. *Normally the radial styloid is 1/2 lower than the ulnar* - The **radial styloid** normally extends approximately **1-1.5 cm (or about 1/2 inch)** *distal* to the ulnar styloid, not lower than. - This difference in length is crucial for normal wrist kinematics, and its reversal can indicate conditions like **ulnar positive variance**. *All of the options* - This option is incorrect because the statement regarding the radial styloid being lower than the ulnar is **false**. - Since one of the options provided is factually incorrect, this choice cannot be true. *Oedema & tenderness over the anatomical snuffbox is the characteristic features of Fracture of the scaphoid* - While **oedema and tenderness in the anatomical snuffbox** are hallmark signs of a **scaphoid fracture**, this statement alone does not encompass all the truth presented in the options. - This specific physical finding is highly indicative of a scaphoid fracture, necessitating further imaging to confirm the diagnosis due to **poor vascular supply** to the scaphoid and risk of **avascular necrosis**.
Question 9: The Milwaukee brace is used in the treatment of which of the following conditions?
- A. Scoliosis (Correct Answer)
- B. Kyphosis
- C. Cubitus varus
- D. Genu varum
Explanation: **Explanation:** The **Milwaukee brace** (also known as a Cervico-Thoraco-Lumbo-Sacral Orthosis or CTLSO) is a classic active corrective orthosis designed specifically for the non-operative management of **Scoliosis**. **1. Why Scoliosis is Correct:** The brace is used for curves with an apex above T7. It works on the principle of **longitudinal traction** and **lateral pressure**. It consists of a pelvic mold, three upright metal stays (one anterior, two posterior), and a neck ring with a throat mold and occipital pads. This design encourages the patient to pull away from the pads, thereby actively correcting the spinal curvature. It is typically indicated for progressive curves between 25° and 40° (Cobb’s angle) in a skeletally immature child (Risser sign 0-II). **2. Why Other Options are Incorrect:** * **Kyphosis:** While a modified Milwaukee brace can be used for Scheuermann’s kyphosis, it is primarily and classically associated with Scoliosis in medical examinations. For lower thoracic kyphosis, a Boston brace or Taylor’s brace is more common. * **Cubitus varus:** This is a coronal plane deformity of the elbow (Gunstock deformity), usually a late complication of supracondylar fractures. It is treated surgically (e.g., French osteotomy), not with a spinal brace. * **Genu varum:** This refers to "bow legs." Treatment involves observation, Vitamin D (if rachitic), or corrective braces like the **HKAFO** or medial upright orthotics, but never a spinal brace. **High-Yield Clinical Pearls for NEET-PG:** * **Boston Brace:** A TLSO (Thoraco-Lumbo-Sacral Orthosis) used for curves with an apex below T7; it is "low-profile" and lacks the neck ring. * **Charleston Bending Brace:** A nocturnal (night-time) brace used for scoliosis. * **Somerset/SOMI Brace:** Used for cervical spine stabilization. * **Indication Rule:** Bracing is generally indicated when the Cobb’s angle is **25°–40°**. If the angle exceeds **40°–45°**, surgical intervention (e.g., spinal fusion with pedicle screws) is usually required.
Question 10: Taylor's Brace is used for which of the following?
- A. Cervical immobilization
- B. Dorsolumbar immobilization (Correct Answer)
- C. Scoliosis
- D. Fracture femur
Explanation: **Explanation:** **Taylor’s Brace** is a high-yield spinal orthosis in orthopaedics. It is a **thoraco-lumbo-sacral orthosis (TLSO)** designed specifically for **dorsolumbar immobilization**. The brace consists of two vertical posterior bars (paraspinal bars) and a pelvic band. It works on the principle of **three-point pressure**, providing hyperextension to the spine. By limiting flexion and rotation of the thoracolumbar junction, it stabilizes the spine, making it the gold standard for conditions like **Pott’s disease (Spinal TB)** and stable compression fractures of the lower thoracic or upper lumbar vertebrae. **Analysis of Options:** * **A. Cervical immobilization:** This requires a cervical collar (e.g., Philadelphia collar) or a Halo-vest. Taylor’s brace does not extend high enough to stabilize the neck. * **C. Scoliosis:** While some TLSOs are used for scoliosis, the specific brace of choice is usually the **Milwaukee brace** (for high curves) or the **Boston brace** (for lower curves). Taylor’s brace is for immobilization, not for corrective lateral forces. * **D. Fracture femur:** Femur fractures are managed with traction, intramedullary nails, or plates; orthotic management involves a Thomas splint or a Knee-Ankle-Foot Orthosis (KAFO), not a spinal brace. **Clinical Pearls for NEET-PG:** * **Ashman’s/Knight’s Brace:** Used for Lumbo-sacral immobilization (LSO). * **Milwaukee Brace:** A CTLSO used for Scoliosis with an apex above T8. * **Somersault/SOMI Brace:** Used for cervical spine injuries (C4-C5 level). * **Key Component:** Taylor’s brace specifically restricts **flexion and extension** of the dorsolumbar spine.
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