Prosthetic Fitting and Training Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Prosthetic Fitting and Training. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Prosthetic Fitting and Training Indian Medical PG Question 1: Amputation is often not required in:
- A. Buerger's
- B. Chronic osteomyelitis (Correct Answer)
- C. Diabetic gangrene
- D. Gas gangrene
Prosthetic Fitting and Training 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.
Prosthetic Fitting and Training Indian Medical PG Question 2: Following a femoral shaft fracture, your consultant asks you to provide tibia traction. Which of the following will you request from the nurse?
1. Thomas splint
2. K-wire
3. Steinmann pin
4. Denham's pin
5. Bohler's stirrup
6. Bohler Braun splint
- A. $1,2,3,4,5,6$
- B. $3,5,6$ (Correct Answer)
- C. $3,4,5$
- D. $1,2,4$
Prosthetic Fitting and Training Explanation: ***3,5,6***
- For **tibia traction** in a femoral shaft fracture, you would need a **Steinmann pin** for skeletal traction, a **Bohler's stirrup** to apply the traction force, and a **Bohler-Braun splint** to support the limb.
- The **Steinmann pin** is inserted into the proximal tibia, the **Bohler's stirrup** attaches to the pin, and the **Bohler-Braun splint** provides a fixed structure for the traction system.
*1,2,3,4,5,6*
- This option incorrectly includes items not specifically used for applying **tibia traction** (e.g., K-wire is for internal fixation, Thomas splint is for early femur fracture management but not specifically for tibia traction application).
- While some components might be used in general fracture management, not all are directly involved in setting up tibia traction as requested.
*3,4,5*
- This option correctly includes the **Steinmann pin** and **Bohler's stirrup** but incorrectly replaces the **Bohler-Braun splint** with a **Denham's pin**.
- A **Denham's pin** is an alternative to a Steinmann pin for skeletal traction, but a **Bohler-Braun splint** is crucial for supporting the limb in this setup, which is missing here.
*1,2,4*
- This option includes a **Thomas splint** (used for femur fracture support, not tibia traction application), a **K-wire** (used for internal fixation, not traction), and a **Denham's pin** (an alternative to Steinmann pin, but lacks the necessary support and traction application equipment).
- These items are not suitable for setting up comprehensive **tibia traction** for a femoral shaft fracture.
Prosthetic Fitting and Training Indian Medical PG Question 3: A pole vaulter had a fall during pole vaulting and had paralysis of the arm . Which of the following investigations gives the best recovery prognosis -
- A. Electromyography (Correct Answer)
- B. Strength Duration Curve
- C. Creatine phosphokinase levels
- D. Muscle biopsy
Prosthetic Fitting and Training Explanation: Electromyography
- **Electromyography (EMG)** can help assess the extent of nerve damage and reinnervation, providing insights into the potential for recovery [1].
- The presence of **spontaneous activity** (fibrillations, positive sharp waves) indicates denervation, while the appearance of **motor unit action potentials (MUAPs)** suggests reinnervation [1].
*Creatine phosphokinase levels*
- **Creatine phosphokinase (CPK)** levels primarily indicate **muscle damage**, not the extent of nerve injury or recovery potential.
- While muscle damage can occur with nerve injury, CPK does not provide specific prognostic information for nerve regeneration.
*Strength Duration Curve*
- The **strength duration curve** assesses the excitability of a nerve or muscle to electrical stimulation.
- While it can differentiate between **nerve and muscle damage**, it provides less comprehensive prognostic information compared to EMG regarding the status of nerve regeneration.
*Muscle biopsy*
- A **muscle biopsy** would directly evaluate muscle pathology, such as atrophy or regeneration.
- However, it is an **invasive procedure** and provides less direct information about nerve recovery compared to EMG, which directly assesses nerve and muscle electrical activity.
Prosthetic Fitting and Training Indian Medical PG Question 4: Patellar tendon-bearing P.O.P. cast is indicated in the following fracture:
- A. Fracture of the tibia (Correct Answer)
- B. Fracture of the patella
- C. Fracture of the femur
- D. Fracture of the medial malleolus
Prosthetic Fitting and Training Explanation: ***Fracture of the tibia***
- A **patellar tendon-bearing (PTB) cast** is specifically designed to bypass the knee joint and transfer weight from the patellar tendon to the cast, offloading the tibia.
- This design is particularly useful for **stable, distal tibia fractures** where partial weight-bearing is desired to promote healing.
*Fracture of the patella*
- A PTB cast would place direct pressure on the **patella**, which is contraindicated in a patellar fracture.
- Patellar fractures often require a **cylinder cast** or surgical fixation to immobilize the knee.
*Fracture of the femur*
- Femoral fractures are typically **more proximal** and require **traction**, **internal fixation**, or a **spica cast** for stabilization.
- A PTB cast would not provide adequate immobilization or weight-bearing relief for a femoral fracture due to its design.
*Fracture of the medial malleolus*
- Medial malleolus fractures involve the **ankle joint**, which is distal to the area covered by a PTB cast.
- These fractures typically require a **short leg cast** or surgical repair, focusing on ankle stabilization.
Prosthetic Fitting and Training Indian Medical PG Question 5: Which prosthesis is shown below in the X-ray?
- A. Articular resurfacing
- B. Thompson prosthesis
- C. Austin Moore's prosthesis (Correct Answer)
- D. Birmingham hip replacement
Prosthetic Fitting and Training Explanation: ***Austin Moore's prosthesis***
- The image clearly shows a **femoral stem with a long intramedullary component** and an **integrated prosthetic head** that articulates directly with the native acetabulum. This is characteristic of a hemiarthroplasty design, specifically resembling an Austin Moore prosthesis.
- This type of prosthesis is commonly used for **femoral neck fractures** in older patients, replacing only the femoral head and neck rather than the entire hip joint.
*Articular resurfacing*
- **Articular resurfacing** involves capping the femoral head and lining the acetabulum with metallic implants, preserving more bone than a traditional total hip replacement.
- The X-ray image does not show a cap on the femoral head or a separate acetabular component, which are features of resurfacing.
*Thompson prosthesis*
- The **Thompson prosthesis** is another type of hemiarthroplasty, but it typically has a **shorter, bulkier femoral stem** and a **relatively smaller head** compared to the Austin Moore prosthesis shown.
- While both Thompson and Austin Moore prostheses are hemiarthroplasties, the specific shape and length of the stem in the X-ray are more consistent with an Austin Moore design.
*Birmingham hip replacement*
- The **Birmingham hip replacement** is a type of **hip resurfacing arthroplasty**, which, as explained earlier, involves capping the femoral head and is not depicted in this image.
- It maintains more of the patient's original bone structure compared to conventional total hip replacement but still requires both femoral and acetabular components.
Prosthetic Fitting and Training Indian Medical PG Question 6: In below-elbow amputation the length of stump should be
- A. 15 - 20 cm (Correct Answer)
- B. 5 - 10 cm
- C. 20 - 25 cm
- D. 10-15 cm
Prosthetic Fitting and Training Explanation: ***15 - 20 cm***
- For a **below-elbow amputation** to be functional, the **stump length** should be approximately **15 to 20 cm** from the olecranon to allow for optimal prosthetic fitting and control.
- This length provides sufficient leverage and preserves enough forearm musculature for effective **prosthetic operation**.
*5 - 10 cm*
- A stump length of **5-10 cm** from the olecranon would be considered too short for a below-elbow amputation, making it difficult to achieve **adequate prosthetic suspension** and control of the artificial limb.
- Such a short stump might be classified as a **very short below-elbow amputation**, which often requires specialized prosthetic designs and can limit functionality.
*20 - 25 cm*
- A stump length of **20-25 cm** from the olecranon would be considered too long for a below-elbow amputation, encroaching on the wrist and hand area.
- An excessively long stump can make it challenging to fit a standard **transradial prosthesis** comfortably and effectively, and might even be classified as a **wrist disarticulation** if extending too far distally.
*10 -15 cm*
- While **10-15 cm** from the olecranon can sometimes be functional, it is often considered on the shorter end of the ideal range for a below-elbow amputation, potentially limiting the effectiveness of certain **prosthetic designs** and control mechanisms.
- A stump in this range might work, but the **15-20 cm range** generally offers superior functional outcomes and easier prosthetic fitting.
Prosthetic Fitting and Training Indian Medical PG Question 7: What is the most effective management strategy for hemarthrosis?
- A. Immobilization with a P.O.P. cast
- B. Application of a compression bandage
- C. Needle aspiration to remove excess blood (Correct Answer)
- D. All of the options
Prosthetic Fitting and Training Explanation: ***Needle aspiration to remove excess blood***
- **Aspirating the blood** from the joint effectively reduces intra-articular pressure, pain, and inflammation.
- This procedure also helps prevent **synovial hypertrophy** and **cartilage damage** caused by the presence of blood in the joint.
*Application of a compression bandage*
- While helpful for reducing swelling and providing support, a **compression bandage alone** does not remove the accumulated blood.
- It may alleviate some discomfort but does not address the underlying issue of **intra-articular blood accumulation**.
*Immobilization with a P.O.P. cast*
- **Immobilization** can help rest the joint and reduce pain, but it does not remove the blood from the joint space.
- Prolonged immobilization can lead to **joint stiffness** and **muscle atrophy**, which are undesirable outcomes.
*All of the options*
- While compression and immobilization can be supportive measures, they are not the **most effective primary strategy** for managing hemarthrosis.
- The direct removal of blood via **aspiration** is crucial for alleviating pressure and preventing long-term joint damage.
Prosthetic Fitting and Training Indian Medical PG Question 8: All of the following statements about SACH feet are true, except:
- A. May wear out with time
- B. 'SACH' stands for 'Solid Ankle Cushioned Heel'
- C. Forms the base of a lower limb prosthesis
- D. Wooden keel absorbs the impact of heel strike (Correct Answer)
Prosthetic Fitting and Training Explanation: ***Wooden keel absorbs the impact of heel strike***
- This statement is incorrect because SACH feet do not have a **wooden keel** for shock absorption.
- Instead, the **cushioned heel** itself absorbs the impact of heel strike.
*May wear out with time*
- **SACH feet**, like all prosthetic components, are subject to **wear and tear** from repeated use and environmental factors.
- The materials used, such as rubber and foam, can degrade over time, necessitating replacement.
*'SACH' stands for 'Solid Ankle Cushioned Heel'*
- The acronym **SACH** accurately describes the design of this prosthetic foot.
- It features a **solid ankle** component and a **cushioned heel** to provide shock absorption during gait.
*Forms the base of a lower limb prosthesis*
- The **SACH foot** is a fundamental component of many lower limb prostheses, regardless of the amputation level.
- It provides the essential interface with the ground, enabling basic ambulation and stability for the user.
Prosthetic Fitting and Training Indian Medical PG Question 9: Which of the following is the metal cofactor of the enzyme ALA dehydratase?
- A. Magnesium
- B. Zinc (Correct Answer)
- C. Lead
- D. Copper
Prosthetic Fitting and Training Explanation: ***Zinc***
- **Zinc** acts as a crucial metal ion cofactor for **ALA dehydratase**, also known as **porphobilinogen synthase**.
- It plays a vital role in the enzyme's catalytic activity, facilitating the **condensation of two molecules of aminolevulinate (ALA)** to form porphobilinogen.
*Copper*
- **Copper** is a cofactor for several enzymes, including **cytochrome c oxidase** and **superoxide dismutase**, but it is not the prosthetic group for ALA dehydratase.
- While essential for various biological processes, its role does not extend to the direct catalysis of **heme synthesis** at the ALA dehydratase step.
*Lead*
- **Lead** is a well-known inhibitor of **ALA dehydratase**, not a prosthetic group.
- The binding of lead to the enzyme's active site displaces essential cofactors like zinc, leading to the accumulation of **ALA** and causing **lead poisoning**.
*Magnesium*
- **Magnesium** is an important cofactor for many enzymes involved in **ATP hydrolysis**, **DNA replication**, and **RNA synthesis**.
- However, it does not function as the prosthetic group for **ALA dehydratase** in the heme biosynthetic pathway.
Prosthetic Fitting and Training Indian Medical PG Question 10: Which of the following flaps is known for having a fixed pivot point at the base?
- A. Interpolation flap
- B. Rotation flap (Correct Answer)
- C. Advancement flap
- D. Transposition flap
Prosthetic Fitting and Training Explanation: ***Rotation flap***
- The **rotation flap** has a **fixed pivot point** at its base and rotates around this point in an arc to cover the adjacent defect.
- The flap moves through a rotational movement, maintaining its blood supply through the base, which acts as the pivot.
- Commonly used in scalp reconstruction, cheek defects, and trunk defects where rotational movement can close the defect.
*Advancement flap*
- The **advancement flap** moves forward in a **linear sliding motion** without rotation.
- It does not have a fixed pivot point; instead, it advances directly into the defect.
- Examples include V-Y advancement and bipedicle advancement flaps.
*Transposition flap*
- The **transposition flap** moves laterally over intervening normal tissue to reach the defect.
- While it rotates, it does not have the same fixed pivot point characteristic as a rotation flap.
- Examples include rhomboid flap and bilobed flap.
*Interpolation flap*
- The **interpolation flap** is transferred over or under intervening tissue, requiring a second stage to divide the pedicle.
- It does not have a fixed pivot point at the base in the same manner as rotation flaps.
- Examples include forehead flap for nasal reconstruction and cross-finger flap.
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