Plastic and Reconstructive Surgery Practice Questions

Q: Which of the following structures is fixed first during reimplantation of an amputated digit -

Bone. ***Bone*** - **Bone fixation** is the crucial first step to stabilize the digit, providing a stable framework for subsequent soft tissue repair. - This **restores skeletal integrity** and allows for proper alignment, reducing tension on delicate vascular and nervous structures. *Vein* - **Vein repair** is typically performed after arterial repair to ensure adequate outflow and prevent congestion, but after bone fixation. - While critical for successful reimplantation, venous repair without prior bone stability is difficult and prone to compromise. *Nerve* - **Nerve repair** is generally performed later in the sequence, after bone and vascular repairs have been completed. - The focus is on restoring blood flow first to ensure tissue viability before addressing nerve continuity for sensation and motor function. *Artery* - **Arterial reconstruction** is paramount for revascularization and tissue viability, but it follows initial bone stabilization. - Attempting to connect arteries without a stable skeletal foundation would make the repair challenging and increase the risk of avulsion or damage.

Q: In combined tendon and nerve injuries, the preferred sequence of repair is:

Nerves should be repaired before tendons. ***Nerves should be repaired before tendons*** - Nerve repairs are **more delicate** and require precise microsurgical technique with minimal tension - Repairing nerves first allows optimal **anatomical positioning** and coaptation without interference from tendon manipulation - Tendon repair involves **greater tissue handling and tension**, which could disrupt a freshly repaired nerve if done first - This sequence is the **standard teaching** in hand surgery (Green's Operative Hand Surgery, Campbell's Operative Orthopaedics) - Once nerves are secured, tendons can be repaired with the necessary tensioning without risk to neural structures *Tendons should be repaired before nerves* - This would subject the **fragile nerve repair to mechanical stress** during subsequent tendon manipulation - Tendon repair requires **forceful suturing and tensioning** that could displace or damage a previously repaired nerve - This sequence makes nerve repair technically more difficult as tendons may obstruct access *Tendons should not be repaired simultaneously with nerves* - While the exact sequence matters, both structures are typically repaired **in the same surgical setting** - The statement is confusing as "simultaneously" could mean same surgery (which is done) versus same moment (which is avoided) - Modern practice favors complete repair in one operation when possible *None of the above* - There is a well-established preferred sequence in combined tendon and nerve injuries - The principle of nerve-before-tendon repair is supported by surgical literature and clinical practice

Q: What does "Take in" mean in case of skin grafting?

Revascularization of the graft. ***Revascularization of the graft*** - "Take in" refers to the process where the **graft establishes a new blood supply** from the recipient site, a critical step for its survival. - This **revascularization** allows the graft to receive oxygen and nutrients, preventing necrosis. *Non adherent graft is shed off* - This describes **graft failure** or sloughing, not successful integration. - A non-adherent graft is indicative of insufficient blood supply or infection, leading to its eventual loss. *Return of the sensation* - While sensation may eventually return to a grafted area, it is a much **later phenomenon** and not what "take in" specifically refers to. - The return of sensation depends on **nerve regrowth** and reinnervation, which can take months to years. *When the graft becomes adherent to recipient site* - Adherence is an **initial step** in graft healing, but it's not the complete definition of "take in." - Adherence is necessary for the subsequent revascularization process, but the graft can adhere without fully "taking in" if blood supply is not established.

Q: Which index is used to score the outcome of treatment in patients with cleft lip and palate?

Goslon Yardstick. ***Goslon Yardstick*** - The **Goslon Yardstick** is a widely accepted and validated index specifically designed to assess the **outcome of surgical treatment** in patients with **cleft lip and palate**. - It provides a **five-point scale** for evaluating dental arch relationships and occlusion based on study models, reflecting the severity of the **dental malocclusion** and the success of surgical intervention. *Index of Orthodontic Treatment Complexity (IOTC)* - The IOTC is used to estimate the **inherent difficulty** of orthodontic cases and the likely complexity of treatment, not as an outcome measure for cleft lip and palate. - It considers factors like **malocclusion severity**, presence of multiple anomalies, and anchorage requirements. *Index of Complexity, Outcome and Need (ICON)* - The ICON is a broad-ranging index used to assess the **need for orthodontic treatment** and to measure the complexity and outcome of general orthodontic cases. - While it can be applied to many orthodontic patients, it is **not specific** for the unique treatment outcomes of cleft lip and palate. *Summer's Index* - This likely refers to the **Handicapping Malocclusion Assessment Record (HMAR)**, sometimes associated with Summer, which quantifies the severity of **malocclusion** for public health screening and determining eligibility for publicly funded orthodontic treatment. - It is a general measure of malocclusion severity and **not specific** for the surgical outcomes in cleft lip and palate patients.

Q: Millard repair is used for treatment of:

Cleft lip. ***Cleft lip*** - **Millard repair** is a widely used surgical technique for the correction of a **unilateral cleft lip**. - It involves a **rotation-advancement flap** principle to reconstruct the cupid's bow, philtral columns, and nasal sill. *Cleft palate* - Surgical repair of a cleft palate typically involves procedures like the **von Langenbeck technique** or **two-flap palatoplasty**, aiming to close the palatal defect and restore speech function. - Unlike cleft lip, these techniques focus on repairing the hard and soft palate and do not involve rotation-advancement flaps specific to the lip. *Meningocele* - A meningocele is a type of **spina bifida** where the meninges protrude through a spinal defect. Its repair involves neurosurgical closure of the defect and excision of the sac. - This condition is a **neural tube defect** and is entirely unrelated to facial congenital anomalies or their repair techniques. *Saddle nose* - **Saddle nose deformity** involves a collapsed nasal bridge, often due to trauma or inflammatory conditions, and is corrected through rhinoplasty using **cartilage grafts** or other reconstructive methods. - This is an acquired or congenital nasal deformity, distinct from a cleft lip, and its correction does not involve Millard's technique.

Q: Graft Survival in first 48 hours depends on

Plasma imbibition. ***Plasma imbibition*** - In the initial 24-48 hours post-grafting, the graft survives primarily through **plasma imbibition**, absorbing nutrients and oxygen directly from the recipient bed fluids without established blood vessels. - This process is crucial for the survival of superficial cells until revascularization begins. *Amount of Saline in graft* - While initial hydration of the graft with saline is important during the procedure, it does not sustain graft viability for the entire 48-hour period. - The saline provides temporary turgor and moisture but doesn't offer the continuous nutrient supply required for cell survival. *Connection between donor and recipient capillaries* - The formation of direct capillary connections, known as **inosculation**, typically starts occurring after 24-48 hours, not within the first 48 hours for the primary survival mechanism. - This process is part of sustained revascularization and not the immediate survival mechanism. *Ingrowth of capillaries in donor tissue* - The actual ingrowth of new capillaries (neovascularization) into the graft tissue is a more delayed process, starting after the initial several days and continuing over weeks. - This is a long-term revascularization process, not the mechanism ensuring immediate survival.

Q: Which of the following is the POOREST recipient bed for a skin graft?

Fat. ***Fat*** - **Fat** is a poor recipient for a skin graft due to its **limited vascularity**, which hinders the necessary process of revascularization for graft survival. - The high metabolic demand of a graft cannot be adequately met by the relatively avascular subcutaneous fat, leading to graft failure. *Muscle* - **Muscle tissue** is an excellent recipient bed for skin grafts due to its **rich blood supply**. - Its robust vascularity effectively supports the revascularization and survival of the grafted tissue. *Deep fascia* - **Deep fascia** provides a good vascularized bed for skin grafts, as it has a reasonable blood supply from underlying muscles and surrounding tissues. - This vascularization is sufficient to nourish and ensure the take of a skin graft. *Skull bone* - **Skull bone** (specifically the periosteum covering it) can serve as an adequate graft bed due to its vascular supply. - If the **periosteum** is intact and healthy, it offers sufficient blood flow for graft survival.

Q: Amputated digits are preserved in:

Plastic bag in ice. ***Plastic bag in ice*** - The amputated digit should be placed in a **sterile plastic bag** and then immersed in a container with **ice water**. This method provides adequate cooling to preserve tissue viability without direct contact with ice, which can cause **frostbite**. - This approach slows down metabolic processes and reduces oxygen demand, extending the time window for successful **replantation**. *Deep freezer* - Placing an amputated digit directly into a deep freezer causes **ice crystal formation** within the cells, leading to severe **tissue damage** and making replantation impossible. - Extreme cold results in **cellular dehydration** and destruction, rendering the tissue non-viable for reattachment. *Cold ringer lactate* - While Ringer's lactate is an appropriate solution for **tissue irrigation** or to keep a digit moist in an emergency, it should not be used as the primary medium for prolonged preservation without adequate cooling. - For optimal preservation, Ringer's lactate could be used *inside* the plastic bag to bathe the digit, but the bag still needs to be placed on ice to achieve the necessary **hypothermic conditions**. *Cold saline* - Similar to Ringer's lactate, cold saline can be used to **cleanse** the amputated part or keep it moist temporarily. However, it is not ideal as the sole preservation method. - Direct immersion in saline with ice is better than plain saline at room temperature but still carries the risk of **tissue maceration** if not properly managed within a sealed bag on ice. The primary goal is cooling, not just hydration.

Q: An autograft of a burn victim is best described by which one of the following?

Transplant from one region of a person to another region. ***Transplant from one region of a person to another region*** - An **autograft** involves transferring tissue from one site to another within the **same individual**. - This type of graft is immunologically optimal as it avoids **immune rejection**. *Transplant from one person to another person* - This describes an **allograft**, where tissue is transplanted between genetically distinct individuals of the **same species**. - **Allografts** carry a risk of rejection and require immunosuppression. *Transplant from one person to a genetically identical person* - This is an **isograft** (or syngraft), occurring between **monozygotic twins** or highly inbred animals. - While genetically identical, it is a specific type of **allograft** and not an autograft. *Transplant from one species to another species* - This describes a **xenograft**, where tissue is transferred between individuals of **different species**. - **Xenografts** face significant immune rejection and ethical considerations, making them less common in standard practice.

Q: Wound contraction can be most effectively minimized by:

Full thickness grafting. ***Full thickness grafting*** - **Full-thickness skin grafts** include the epidermis and full dermis, which contains **fewer myofibroblasts** than split-thickness grafts, thus minimizing contraction. - The greater amount of dermal tissue acts as a **mechanical barrier** to prevent excessive wound contraction, providing a more stable and aesthetically pleasing result. *Allowing secondary granulation* - Healing by **secondary intention** involves substantial granulation tissue formation, which is rich in **myofibroblasts** and leads to significant wound contraction. - This method of healing is often used for infected or contaminated wounds but results in the **most contraction**. *Split skin graft* - **Split-thickness skin grafts** contain only a portion of the dermis, making them prone to **moderate to significant wound contraction**. - While better than secondary intention, the thin dermal layer provides less resistance to the contractile forces of the **myofibroblasts**. *Dressing with placenta* - **Placental tissue dressings** can promote wound healing by providing growth factors and a scaffold for regeneration. - However, they do not inherently prevent or minimize **wound contraction** in the same way that a full-thickness graft mechanically does, as they do not replace the entire dermal layer.

Question 1

Which of the following structures is fixed first during reimplantation of an amputated digit -

Accepted Answer

Bone

Answer

Vein

Answer

Nerve

Answer

Artery

Question 2

In combined tendon and nerve injuries, the preferred sequence of repair is:

Accepted Answer

Nerves should be repaired before tendons

Answer

Tendons should be repaired before nerves

Answer

None of the above

Answer

Tendons should not be repaired simultaneously with nerves

Question 3

What does "Take in" mean in case of skin grafting?

Accepted Answer

Revascularization of the graft

Answer

Non adherent graft is shed off

Answer

Return of the sensation

Answer

When the graft becomes adherent to recipient site

Question 4

Which index is used to score the outcome of treatment in patients with cleft lip and palate?

Accepted Answer

Goslon Yardstick

Answer

Index of Orthodontic Treatment Complexity (IOTC)

Answer

Summer’s Index

Answer

Index of Complexity, Outcome and Need (ICON)

Question 5

Millard repair is used for treatment of:

Accepted Answer

Cleft lip

Answer

Cleft palate

Answer

Meningocele

Answer

Saddle nose

Question 6

Graft Survival in first 48 hours depends on

Accepted Answer

Plasma imbibition

Answer

Amount of Saline in graft

Answer

Connection between donor and recipient capillaries

Answer

Ingrowth of capillaries in donor tissue

Question 7

Which of the following is the POOREST recipient bed for a skin graft?

Accepted Answer

Fat

Answer

Muscle

Answer

Deep fascia

Answer

Skull bone

Question 8

Amputated digits are preserved in:

Accepted Answer

Plastic bag in ice

Answer

Deep freezer

Answer

Cold ringer lactate

Answer

Cold saline

Question 9

An autograft of a burn victim is best described by which one of the following?

Accepted Answer

Transplant from one region of a person to another region

Answer

Transplant from one person to another person

Answer

Transplant from one person to a genetically identical person

Answer

Transplant from one species to another species

Question 10

Wound contraction can be most effectively minimized by:

Accepted Answer

Full thickness grafting

Answer

Allowing secondary granulation

Answer

Split skin graft

Answer

Dressing with placenta

Plastic and Reconstructive Surgery — MCQs

Plastic and Reconstructive Surgery — MCQs

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