General Surgery Principles Practice Questions

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.

Q: Identify the instrument:

Artery forceps. ***Artery forceps*** - The image displays a common **hemostatic clamp** or artery forceps, characterized by its **ring handles**, **ratchet mechanism**, and **serrated jaws**, which are designed to grasp and occlude blood vessels. - The jaws are often curved or straight, and they interlock to provide a secure grip, classifying it as a **clamping instrument**. *Single tooth vulsellum* - A vulsellum has **sharp, pointed teeth** at its tips, designed to grasp dense tissue like the cervix, which is not seen here. - Vulsellums typically have a much more aggressive and pointed jaw design compared to the image. *Tenaculum* - A tenaculum is similar to a vulsellum but often has **finer, sharper points** for piercing tissue, especially the cervix during gynecological procedures. - The instrument in the image lacks the piercing tips characteristic of a tenaculum. *Ovum-holding forceps* - Ovum-holding forceps have **fenestrated (windowed) jaws** with rounded edges, designed to gently grasp fragile tissues like the ovum or polyps without causing trauma. - The instrument shown has completely closed, serrated jaws, not open fenestrated ones.

Q: Identify the instrument:

Babcock forceps. ***Babcock forceps*** - Babcock forceps are characterized by their **atraumatic, rounded, fenestrated jaws** with a serrated inner surface that allows for a secure grip on delicate tissues without causing significant damage. - They are commonly used in surgery to **grasp and hold tubular structures** such as the bowel, fallopian tubes, or blood vessels without crushing them. *Ovum-holding forceps* - Ovum-holding forceps have **delicate, smooth or minimally serrated jaws** designed to handle small, fragile structures. - They are primarily used in **assisted reproductive procedures** or to grasp delicate tissues during gynecologic surgeries without causing trauma. *Artery forceps* - Artery forceps (e.g., Crile or Halstead mosquito forceps) have **narrow, serrated jaws** that run the full length of the tip. - They are designed to **clamp blood vessels** to control bleeding and typically have a locking mechanism. *Kocher forceps* - Kocher forceps are distinguished by their **transverse serrations** and **1x2 teeth** at the tip of the jaws. - These features provide a **strong, secure grip** on tough tissues but can be traumatic, making them unsuitable for delicate structures.

Q: Identify the instrument:

Sponge-holding forceps. ***Sponge-holding forceps*** - This image clearly shows **sponge-holding forceps**, identifiable by their **long handles** and **fenestrated, serrated jaws** used for holding swabs or sponges during surgical procedures. - The jaws are designed to securely grip materials without crushing them, crucial for gentle tissue handling or applying antiseptics. *Ovum forceps* - **Ovum forceps** typically have **cup-shaped jaws** with or without teeth, specifically designed for removing placental fragments or uterine contents. - Their jaws are usually shorter and more rounded than those depicted. *Kocher forceps* - **Kocher forceps** are characterized by their **transverse serrations** and **1x2 teeth** at the tip, designed for strong and atraumatic grasping of tissue. - The jaws in the image are clearly fenestrated and do not have the characteristic teeth of Kocher forceps. *Allis forceps* - **Allis forceps** have **multiple fine teeth** at the tip that intermesh, providing a secure but potentially traumatic grip on tissue. - They are used for grasping and holding tissue that is to be removed, distinguishing them from the broader, fenestrated jaws shown.

Question 1

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 2

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 3

Identify the knot?

Accepted Answer

Surgeon's knot

Answer

Double Knot

Answer

Reef knot

Answer

Granny's knot

Question 4

What is correct regarding this suture?

Accepted Answer

Monofilament

Answer

Collagen derived

Answer

Non absorbable

Answer

Braided multifilament

Question 5

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 6

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 7

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

Question 8

Identify the instrument:

Accepted Answer

Artery forceps

Answer

Single tooth vulsellum

Answer

Tenaculum

Answer

Ovum-holding forceps

Question 9

Identify the instrument:

Accepted Answer

Babcock forceps

Answer

Ovum-holding forceps

Answer

Artery forceps

Answer

Kocher forceps

Question 10

Identify the instrument:

Accepted Answer

Sponge-holding forceps

Answer

Ovum forceps

Answer

Kocher forceps

Answer

Allis forceps

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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