General Surgery Principles Practice Questions

Q: The given image shows an ulcer. Identify the marked structure.

Edge. ***Edge*** - The marked structure represents the side of the ulcer, connecting the **margin** to the **floor**, which is correctly termed the **edge**. - The characteristics of the edge (e.g., sloping, punched-out, undermined) are crucial for determining the ulcer's etiology, such as in **tuberculous ulcers** (undermined) or **malignant ulcers** (everted). *Margin* - The **margin** is the area of skin immediately surrounding the ulcer, essentially the "rim" on the surface. - The arrow is pointing into the crater of the ulcer, not the tissue around its periphery. *Floor* - The **floor** is the bottom, visible surface of the ulcer crater itself. - The marked structure is the wall leading down to the floor, not the floor itself. *Base* - The **base** is the tissue deep to the ulcer, upon which it rests, and is typically assessed by palpation for induration. - It is not a visible structure on inspection, unlike the edge which is clearly marked in the diagram.

Q: A 25-year-old patient presents to the surgical OPD with a painless left inguinal reducible mass. On examination cough impulse is positive. After further investigations, the patient is diagnosed with an inguinal hernia. What is the surgical management of this patient?

b.Hernioplasty. ***Hernioplasty***- **Hernioplasty**, which utilizes a prosthetic mesh (e.g., **Lichtenstein technique**), is the universally accepted standard for repairing adult inguinal hernias to achieve a tension-free repair.- This method provides a **tension-free repair** of the posterior inguinal wall, leading to significantly lower recurrence rates compared to traditional suture repairs.*Herniotomy*- **Herniotomy** involves only the excision of the hernia sac and is typically reserved for **indirect inguinal hernias in children**, where the muscle wall is robust.- In an adult, failing to repair the inherent weakness of the **inguinal canal floor** after sac removal results in an unacceptably high risk of hernia recurrence.*Wait and watch*- This approach is mainly reserved for **elderly or comorbid patients** with minimally symptomatic or asymptomatic reducible hernias who are considered high risk for surgery.- For a fit 25-year-old, surgery is recommended to prevent future potentially life-threatening complications like **strangulation** or chronic pain.*Emergency laparotomy*- A full **laparotomy** is an extensive abdominal incision utilized for exploring the acute abdomen or managing complicated intra-abdominal sepsis.- This procedure is unnecessary as the hernia is described as **reducible** and **painless**, indicating an elective repair is warranted, not an emergency exploration.

Q: Identify the given instrument.

Linear stapler. ***Linear stapler*** - The instrument shown has a long shaft with two jaws that apply staples in a straight line, which is characteristic of a **linear stapler**. - It is primarily used in **abdominal** and **thoracic surgery** for transecting tissue or closing internal organs like the stomach, intestines, or lung parenchyma. *Skin stapler* - A **skin stapler** is a much smaller, handheld device used exclusively for closing skin incisions externally and has a distinctly different appearance. - It applies single, wide staples and is not used for internal tissue anastomosis or transection. *Circular stapler* - A **circular stapler** has a round head at the distal end designed to create a circular, end-to-end anastomosis, typically in **colorectal** or **esophageal** surgery. - The instrument in the image lacks this circular head and is designed for a linear staple line. *Curved stapler* - This term most commonly refers to a **circular stapler** or a **curved linear cutter**, which has a curved head to facilitate access in locations like the pelvis. - The instrument shown has straight jaws, not a curved head, and is designed for creating a straight line of staples.

Q: Elective splenectomy is preferred in which of the following conditions?

Hereditary spherocytosis. ***Hereditary spherocytosis***- It is the preferred elective treatment because the inherited structural defect in the red blood cell membrane leads to the sequestration and destruction of the rigid **spherocytes** primarily by the **spleen**. - Splenectomy significantly reduces hemolysis and corrects chronic anemia, but it is typically delayed until the child is over 5 years old to reduce the risk of **post-splenectomy sepsis**.*G6PD deficiency-Glucose-6-phosphate dehydrogenase deficiency*- This condition causes episodic hemolysis (typically **intravascular**) triggered by **oxidative stress** (drugs, fava beans, infection), not continuous extravascular hemolysis reliant on the spleen.- The mainstay of management is identifying and **avoiding oxidant triggers**; splenectomy is not indicated as it does not address the underlying enzymatic deficiency or the mechanism of hemolysis.*Paroxysmal nocturnal hemoglobinuria*- PNH is characterized by complement-mediated cytotoxicity due to lack of **GPI-anchored proteins** (CD55, CD59) on RBCs, leading to **intravascular hemolysis**.- Treatment involves targeted therapies like **complement inhibitors** (e.g., **eculizumab**) or **hematopoietic stem cell transplant**; splenectomy is usually ineffective and potentially harmful.*Hairy cell leukemia*- This is a **B-cell malignancy** effectively treated with chemotherapy using **purine analogs** (e.g., **cladribine**), which is the standard first-line approach for symptomatic disease.- Splenectomy may be considered for massive symptomatic **splenomegaly** or severe **refractory cytopenias**, but it is a secondary intervention and not the preferred elective treatment for the condition itself.

Q: Identify the knot?

Surgeon's knot. ***Surgeon's knot*** - The image displays the characteristic first throw of a **Surgeon's knot**, which involves looping the suture end twice (a **double throw** or double twist) instead of once. - This double throw is designed to increase friction, preventing slippage when securing vascular pedicles or tissues under **high tension** before completing the knot with a second single throw. *Granny's knot* - A **Granny's knot** is formed by two consecutive throws made in the same direction, meaning the second throw does not reverse the first. - This design causes the knot to lie obliquely, making it inherently weak and prone to **slipping** or untying, especially under tension. *Reef knot* - Also known as a **Square knot**, a Reef knot consists of two consecutive throws made in **opposite directions** (e.g., right-over-left followed by left-over-right). - It is a secure knot when used correctly, but it uses only a single twist for the first throw, unlike the double twist shown in the image. *Double Knot* - "Double knot" is a generalized or imprecise term; while a Surgeon's knot involves a double twist, this term does not precisely describe the unique **structure and function** of the knot shown. - The image specifically illustrates the deliberate **two consecutive wraps** in the first throw, which precisely defines the specialized technique of the Surgeon's knot.

Q: What is correct regarding this suture?

Monofilament. ***Monofilament*** - **Monofilament** sutures consist of a single strand, which minimizes tissue drag and reduces the risk of harboring **bacteria** and subsequent wound infection. - This structure is typical for materials like **Prolene** (Polypropylene) and **Nylon**, prized for their low friction and use in delicate or contaminated fields. *Non absorbable* - This describes the **fate** of the suture (remaining permanently in the body) but not its structure; non-absorbable sutures can be either **monofilament** (e.g., Nylon) or multifilament (e.g., Silk). - While many important sutures are non-absorbable, it is a property independent of whether the suture is single-stranded. *Braided multifilament* - This refers to sutures made of multiple intertwined strands, which is the structural opposite of a **monofilament**. - Multifilament sutures typically offer better knot security but have increased tissue drag and potential for **capillarity** (wicking action). *Collagen derived* - This refers to the material source, specifically **catgut** (made from sheep or cow intestine), which is an absorbable natural material. - Catgut is absorbable and rapidly loses its tensile strength; 'monofilament' describes the physical form and is not exclusive to this biologic material.

Q: A patient underwent surgery for a reducible groin swelling. The image shows the layers of the hernia sac identified intraoperatively. Using the reference table below that enumerates the covering layers of inguinal hernias, identify the type of hernia shown: | Indirect inguinal hernia | Direct inguinal hernia | | :--: | :--: | | - Extraperitoneal tissue - Internal spermatic fascia - Cremasteric fascia - External spermatic fascia - Skin | - Extraperitoneal tissue - Fascia transversalis - Conjoint tendon (in medial direct hernia) - Cremaster fascia (in lateral direct hernia) - External spermatic fascia - Skin |

Direct inguinal hernia. ***Direct inguinal hernia*** - The image shows presence of **fascia transversalis** in the hernia sac, which is **characteristic of direct inguinal hernia** - Direct hernia protrudes through **Hesselbach's triangle**, medial to the inferior epigastric vessels - It herniates directly through the **posterior wall of the inguinal canal** due to weakness in the transversalis fascia - Covered by fascia transversalis, not by all three layers of spermatic fascia *Indirect inguinal hernia* - Would pass through the **internal inguinal ring** lateral to inferior epigastric vessels - Covered by **internal spermatic fascia** (from transversalis fascia), cremasteric fascia, and external spermatic fascia - Does NOT have direct contact with fascia transversalis as shown in the image *Femoral hernia* - Protrudes through the **femoral canal** below the inguinal ligament - More common in females, located in the femoral triangle - Would not show the anatomical layers described for inguinal hernias *Spigelian hernia* - Occurs through the **spigelian fascia** (aponeurotic layer between rectus abdominis and semilunar line) - Located lateral to the rectus muscle, typically below the level of umbilicus - Not associated with the inguinal canal anatomy shown

Q: The suture material shown below is sterilized by which method?

Gamma radiation. ***Gamma radiation*** - **Catgut sutures**, being made from natural, collagen-based materials, are **heat-sensitive** and cannot withstand high temperatures or steam. - **Ionizing radiation**, specifically gamma radiation, is effective for sterilizing heat-sensitive medical devices and materials without causing thermal damage, while still effectively killing microorganisms. *Dry heat sterilization* - Dry heat sterilization requires high temperatures for extended periods, which would **damage the protein structure of catgut**, leading to degradation and loss of tensile strength. - This method is typically used for items that can withstand high heat but are sensitive to moisture, such as powders, oils, and some glassware. *Autoclave (moist heat)* - While highly effective for many surgical instruments, **autoclaving (moist heat)** would cause the **collagen fibers of catgut to denature** and melt, destroying the suture material. - Catgut is highly susceptible to hydrolysis and degradation in the presence of heat and moisture. *Chemical sterilization with ethylene oxide* - Although ethylene oxide can be used for heat-sensitive materials, its use is often limited due to **toxic residue concerns** and the need for a lengthy aeration process. - While technically possible for some heat-sensitive items, **gamma radiation** is generally preferred for catgut due to its efficiency and lack of toxic residues.

Q: What does the given image show?

Doyen's periosteal elevator. ***Doyen's periosteal elevator*** - This instrument is characterized by its **curved, spoon-like working end** and solid handle, designed for **elevating the periosteum** from bone. - Doyen's elevator comes in various sizes and angles, but the distinct hook-like curve is a key identifying feature, distinguishing it from other elevators. *Cobb's spinal elevator* - Cobb's elevator typically has a **flat, broad, and slightly curved blade** with a rounded or tapered tip, suitable for dissecting along bony surfaces, particularly in spinal surgery. - Its design prioritizes broad, even separation of tissue layers, contrasting with the more acute curve of the Doyen's. *Leksell's rongeur* - A rongeur is a biting instrument used for **gnawing away bone or tough tissue**, characterized by hinged jaws with sharp, cup-shaped ends. - The image clearly shows a single-piece instrument without hinged jaws, ruling out a rongeur. *Key periosteal elevator* - The Key elevator typically features a **broader, more rounded or slightly angled tip** and a flat, somewhat spatula-like working end, used for general periosteal elevation. - While also a periosteal elevator, its working end does not exhibit the characteristic deep, hook-like curve seen in the Doyen's elevator.

Question 1

The given image shows an ulcer. Identify the marked structure.

Accepted Answer

Edge

Answer

Base

Answer

Floor

Answer

Margin

Question 2

A 25-year-old patient presents to the surgical OPD with a painless left inguinal reducible mass. On examination cough impulse is positive. After further investigations, the patient is diagnosed with an inguinal hernia. What is the surgical management of this patient?

Accepted Answer

b.Hernioplasty

Answer

a.Herniotomy

Answer

c.Wait and watch

Answer

d.Emergency laparotomy

Question 3

Identify the given instrument.

Accepted Answer

Linear stapler

Answer

Curved stapler

Answer

Circular stapler

Answer

Skin stapler

Question 4

Elective splenectomy is preferred in which of the following conditions?

Accepted Answer

Hereditary spherocytosis

Answer

Hairy cell leukemia

Answer

Paroxysmal nocturnal hemoglobinuria

Answer

G6PD deficiency

Question 5

Which of the following statements regarding Vacuum-Assisted Closure (VAC) therapy is correct?
1. It promotes granulation tissue formation
2. It reduces interstitial and periwound edema
3. It drains excessive exudate
4. It increases local blood flow

Accepted Answer

All correct

Answer

1 and 3 correct

Answer

2 and 4 correct

Answer

1, 2, 3 correct

Question 6

Identify the knot?

Accepted Answer

Surgeon's knot

Answer

Double Knot

Answer

Reef knot

Answer

Granny's knot

Question 7

What is correct regarding this suture?

Accepted Answer

Monofilament

Answer

Collagen derived

Answer

Non absorbable

Answer

Braided multifilament

Question 8

A patient underwent surgery for a reducible groin swelling. The image shows the layers of the hernia sac identified intraoperatively. Using the reference table below that enumerates the covering layers of inguinal hernias, identify the type of hernia shown: | Indirect inguinal hernia | Direct inguinal hernia | | :--: | :--: | | - Extraperitoneal tissue
- Internal spermatic
fascia
- Cremasteric fascia
- External spermatic
fascia
- Skin | - Extraperitoneal tissue
- Fascia transversalis
- Conjoint tendon (in medial
direct hernia)
- Cremaster fascia (in
lateral direct hernia)
- External spermatic fascia
- Skin |

Accepted Answer

Direct inguinal hernia

Answer

Indirect inguinal hernia

Answer

Femoral hernia

Answer

Spigelian hernia

Question 9

The suture material shown below is sterilized by which method?

Accepted Answer

Gamma radiation

Answer

Dry heat sterilization

Answer

Autoclave (moist heat)

Answer

Ethylene oxide

Question 10

What does the given image show?

Accepted Answer

Doyen's periosteal elevator

Answer

Cobb's spinal elevator

Answer

Leksell's rongeur

Answer

Key periosteal elevator

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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