General Surgery Principles Practice Questions

Q: EUSOL solution used in treatment of venous ulcer contains all except

Sodium hydroxide. ***Sodium hydroxide*** - EUSOL (Edinburgh University Solution of Lime) solution is an antiseptic solution that traditionally contains equal parts of **bleaching powder (chlorinated lime)** and **boric acid**, dissolved in water. - **Sodium hydroxide** is not a component of the standard EUSOL solution formulation. *Boric acid* - **Boric acid** is a key ingredient in EUSOL solution, contributing to its antiseptic and mild astringent properties. - It helps to buffer the solution and enhance its stability. *Calcium hydroxide* - **Calcium hydroxide** is a component of **chlorinated lime**, which is used to generate sodium hypochlorite within the solution. - It is an indirect ingredient, as part of the bleaching powder. *Sodium hypochlorite* - **Sodium hypochlorite** is the active antiseptic agent formed when chlorinated lime reacts with water. - It provides the primary antimicrobial action against bacteria in wounds.

Q: The gold standard for definitive wound coverage in open wounds requiring tissue replacement is:

Skin grafting. ***Skin grafting*** - **Skin grafting** involves transplanting healthy skin from one area of the body to another to cover a wound. This is the **gold standard for definitive wound coverage** in open wounds requiring tissue replacement. - It provides **viable, vascularized tissue** that can permanently integrate with the wound bed, making it superior for large or deep wounds where other methods are insufficient. - Both **split-thickness skin grafts (STSG)** and **full-thickness skin grafts (FTSG)** are used depending on the wound characteristics and requirements. *Traditional dressings* - While essential for initial wound care, **traditional dressings (e.g., gauze)** primarily provide a protective barrier and absorb exudate, but they do not contribute to definitive tissue replacement for open wounds. - They are considered a staple for **temporary management** and healing by secondary intention, but not the "gold standard" for *replacing* lost tissue. *Synthetic skin substitutes* - These are **engineered materials** designed to mimic some functions of skin, providing a temporary or permanent cover. - While useful for **wound healing acceleration** or as a temporary bridge for grafting, they are not universally considered the **gold standard for definitive tissue replacement** in all open wounds as they may lack full integration or viability compared to native tissue. *Biological dressings* - These include materials derived from human or animal tissue (e.g., **allografts, xenografts**) that serve as temporary wound coverings. - Biological dressings help **prepare the wound bed** and promote healing but are often resorbed or rejected and typically need to be replaced by a permanent solution like skin grafting for definitive closure.

Q: Tensile strength of a wound becomes normal after:

Never. ***Never*** - A healed wound, even after complete maturation, only achieves about **80% of the original tissue's tensile strength** - The process of scar formation involves the realignment of collagen fibers and increased cross-linking, but it can **never perfectly replicate** the pre-injury tissue architecture and strength - This is a fundamental principle of wound healing - scar tissue is structurally different from normal tissue *6 months* - By 6 months, a wound's tensile strength has typically reached its **maximum potential** of approximately 80%, but this is still less than 100% of the original tissue's strength - This period marks the end of the significant remodeling phase, where collagen fibers are reorganized and strengthened *4 months* - At 4 months, the wound is still undergoing substantial **remodeling and strengthening**, achieving approximately 70-80% of eventual tensile strength - While considerable strength is gained by this time, further improvements continue for several more months *6 weeks* - At 6 weeks, the wound has achieved about **50-70% of its eventual tensile strength** - This stage is characterized by increased collagen deposition and cross-linking, making the wound clinically strong, but it is far from its maximum or normal strength

Q: For a lacerated wound, delayed primary suturing is done within:

48 hr. ***48 hr*** - **Delayed primary closure (DPC)** is typically performed **between 48 hours and 7 days** after the initial injury, with **48 hours representing the earliest threshold** for this technique. - At 48 hours, the wound has passed the acute inflammatory phase, bacterial load has been reduced through initial wound care, and the tissue can be assessed for readiness to close. - This method is used for **contaminated or potentially infected wounds** where immediate closure would risk infection, allowing time for wound cleaning and monitoring. - While optimal DPC is often performed at **3-5 days**, 48 hours marks the transition from primary to delayed primary closure. *24 hr* - This timeframe represents **primary closure**, where clean, uncontaminated wounds are sutured immediately or within the first 24 hours of injury. - At 24 hours, contaminated wounds have not had sufficient time for bacterial load reduction and inflammatory response assessment. *36 hr* - While 36 hours represents a delay from immediate closure, it falls short of the **minimum 48-hour threshold** typically required for delayed primary closure. - This intermediate timeframe does not allow adequate wound assessment and bacterial load reduction. *50 hr* - Although 50 hours falls within the DPC window (48 hours to 7 days), the question asks for the timeframe within which DPC is done, and **48 hours is the established earliest/minimum threshold**. - While DPC can certainly be performed at 50 hours, 48 hours is the standard benchmark cited in surgical literature as the beginning of the DPC window.

Q: Howship-Romberg sign is seen in

Obturator hernia. ***Obturator hernia*** - The **Howship-Romberg sign** is characterized by **medial thigh pain** on hip extension, adduction, and internal rotation, which is indicative of an obturator hernia. - This symptom arises from compression of the **obturator nerve** as it passes through the obturator canal alongside the hernia sac. *Spigelian hernia* - A Spigelian hernia presents as a **ventrolateral abdominal wall defect**, typically between the rectus abdominis muscle and linea semilunaris. - It usually causes localized pain and a palpable lump but does not involve **obturator nerve compression**. *Femoral hernia* - A femoral hernia manifests as a bulge in the **groin region** below the inguinal ligament, often presenting as an emergent strangulated hernia. - While it can cause groin pain, it does not typically involve the **obturator nerve** or present with the **Howship-Romberg sign**. *Inguinal hernia* - Inguinal hernias are common, presenting as a bulge in the groin, either **direct or indirect**, above the inguinal ligament. - Symptoms include a palpable mass and discomfort, but not the specific **medial thigh pain** associated with obturator nerve compression.

Q: Which of the following muscles is cut in posterolateral thoracotomy?

Latissimus dorsi. ***Latissimus dorsi*** - The **latissimus dorsi** is the **largest muscle divided** during a standard posterolateral thoracotomy incision. - It is the **most superficial** of the divided muscles and is routinely cut to allow access to the deeper structures and ribs required for entry into the thoracic cavity. - This is the **primary muscle** identified with this surgical approach. *Serratus anterior* - The **serratus anterior** is also typically **divided** (along with latissimus dorsi) in a posterolateral thoracotomy. - However, latissimus dorsi is considered the **more characteristic** muscle of this approach due to its larger size and more superficial position. - Preservation when possible is important for shoulder function (scapular protraction and superior rotation). *Rhomboids* - The **rhomboid muscles** (major and minor) lie deeper, beneath the trapezius, and are **not typically cut** in a standard posterolateral thoracotomy. - They remain protected and are involved in **scapular retraction** and downward rotation. *Pectoralis major* - The **pectoralis major** muscle is a large chest muscle located **anteriorly** and is **not involved** in a posterolateral thoracotomy approach. - This muscle is relevant in anterior thoracotomy approaches, where it's involved in **adduction, medial rotation**, and flexion of the humerus.

Q: During cardiopulmonary resuscitation, cardiac massage is given over:

Lower third of sternum. ***Lower third of sternum*** - Correct hand placement for **cardiac compressions** is on the **lower half of the sternum**, approximately at the junction of the middle and lower thirds. - Position: **Center of the chest**, 2 finger breadths above the xiphoid process, which corresponds anatomically to the lower third area. - This placement ensures optimal compression of the heart between the sternum and spine, maximizing **cardiac output** during CPR according to **AHA and ERC guidelines**. *Mid third of sternum* - Compressing only the mid-third (middle of sternum) is **too high** for optimal cardiac compression. - This placement is above the ideal position and results in **less effective blood flow** during resuscitation. *Upper third of sternum* - Compressing the upper third of the sternum is **highly ineffective** for cardiac compression. - Can lead to injuries such as **fractures of the clavicle** or upper ribs without achieving adequate cardiac compression. *Precordium* - **Precordium** refers to the general area over the heart, but it is **not precise enough** for effective CPR hand placement. - This vague anatomical term doesn't provide the specific landmark needed for proper compression technique.

Q: In flap method of amputation, which structure is kept shorter than the level of amputation?

Bone. ***Bone*** - In the **flap method of amputation**, the bone is intentionally cut **shorter** than the soft tissue flaps (typically 2-3 cm proximal to the planned skin closure level). - This allows the **muscle and skin flaps** to be closed over the end of the bone without tension, providing good padding and a well-contoured stump for prosthesis fitting. - This is the **primary structural principle** of flap amputation technique. *Nerves* - **Nerves** are typically cut sharply under gentle traction and allowed to retract proximally (usually 5-10 cm proximal to bone level) to prevent **neuroma formation** and phantom limb pain. - While nerves are indeed cut shorter, the **bone** is the structure specifically beveled shorter **for the purpose of flap closure**, which is what the question asks. *Vessels* - **Vessels** (arteries and veins) are ligated and divided at a level that ensures **hemostasis** and allows for proper flap closure. - They are handled for vascular control, not specifically kept shorter than the bone for shaping the stump. *Muscles* - **Muscles** are usually beveled and sewn to each other (myoplasty) or to the periosteum (myodesis) over the bone end to provide a well-padded, functional stump. - Muscles form the **flap itself** and are **longer than the bone**, not shorter, as they must cover and cushion it.

Q: During hysterectomy, dissection through the broad ligament most commonly risks injury to which structure?

Ureter. ***Ureter*** - During a hysterectomy, especially when dissecting deeply within the **broad ligament** to ligate the uterine artery, the **ureter** is at high risk of injury due to its close anatomical proximity. - The ureter passes just **inferior to the uterine artery** (water under the bridge), making it vulnerable during clamping and ligation of the uterine vessels. *Transverse colon* - The transverse colon is located much higher in the abdomen and is not typically within the surgical field of a hysterectomy unless there is **extensive adhesion formation** or a very unusual approach. - Injury to the transverse colon is highly **unlikely** during an uncomplicated hysterectomy through the broad ligament. *Bladder* - The bladder is anterior to the uterus and is more commonly at risk of injury when dissecting the **vesicouterine fold** or during mobilization of the anterior vaginal wall. - While a common site of injury in hysterectomy, it is less directly related to dissection within the **broad ligament** itself, which is more lateral to the bladder's dome. *Urethra* - The urethra is the terminal portion of the urinary tract and is located much more **inferiorly and anteriorly**, within the pelvic floor and distal to the surgical field for uterine removal. - Injury to the urethra is extremely rare during a routine hysterectomy and would imply a significant **surgical misadventure** far from the broad ligament.

Q: In the acute management of ecchymosis and hematoma, which thermal modality is most appropriate?

Intermittent ice pack. ***Intermittent ice pack*** - An **intermittent ice pack** is the cornerstone of acute thermal management for ecchymosis and hematoma, reducing **swelling** and **inflammation**. - Cold application causes **vasoconstriction**, minimizing further bleeding into tissues and providing **analgesia** by numbing the affected area. - Intermittent application (15-20 minutes on, 20-30 minutes off) prevents tissue damage while maximizing therapeutic benefit. - Part of the **RICE protocol** (Rest, Ice, Compression, Elevation) for acute soft tissue injuries. *Continuous ice pack* - **Continuous ice pack** application can cause **tissue damage**, including frostbite, nerve injury, and skin necrosis. - Prolonged vasoconstriction impairs tissue perfusion and delays healing by limiting oxygen and nutrient delivery. - Should be avoided in favor of intermittent application. *Pressure and pack* - While **compression/pressure** is indeed an important component of acute hematoma management, this option refers to the mechanical intervention rather than the thermal modality asked in the question. - Pressure dressings are used **in conjunction with** ice application, not as an alternative thermal treatment. - The question specifically asks about thermal modality, making ice the correct answer. *Intermittent hot pack* - **Heat application** in the acute phase causes **vasodilation**, which would increase blood flow and exacerbate bleeding. - This would worsen swelling and hematoma formation in the initial 24-48 hours post-injury. - Heat therapy is reserved for the later stages (after 48-72 hours) to promote healing and reduce chronic inflammation.

Question 1

EUSOL solution used in treatment of venous ulcer contains all except

Accepted Answer

Sodium hydroxide

Answer

Boric acid

Answer

Calcium hydroxide

Answer

Sodium hypochlorite

Question 2

The gold standard for definitive wound coverage in open wounds requiring tissue replacement is:

Accepted Answer

Skin grafting

Answer

Traditional dressings

Answer

Synthetic skin substitutes

Answer

Biological dressings

Question 3

Tensile strength of a wound becomes normal after:

Accepted Answer

Never

Answer

6 months

Answer

4 months

Answer

6 weeks

Question 4

For a lacerated wound, delayed primary suturing is done within:

Accepted Answer

48 hr

Answer

24 hr

Answer

36 hr

Answer

50 hr

Question 5

Howship-Romberg sign is seen in

Accepted Answer

Obturator hernia

Answer

Spigelian hernia

Answer

Femoral hernia

Answer

Inguinal hernia

Question 6

Which of the following muscles is cut in posterolateral thoracotomy?

Accepted Answer

Latissimus dorsi

Answer

Serratus anterior

Answer

Rhomboids

Answer

Pectoralis major

Question 7

During cardiopulmonary resuscitation, cardiac massage is given over:

Accepted Answer

Lower third of sternum

Answer

Mid third of sternum

Answer

Upper third of sternum

Answer

Precordium

Question 8

In flap method of amputation, which structure is kept shorter than the level of amputation?

Accepted Answer

Bone

Answer

Nerves

Answer

Vessels

Answer

Muscles

Question 9

During hysterectomy, dissection through the broad ligament most commonly risks injury to which structure?

Accepted Answer

Ureter

Answer

Transverse colon

Answer

Bladder

Answer

Urethra

Question 10

In the acute management of ecchymosis and hematoma, which thermal modality is most appropriate?

Accepted Answer

Intermittent ice pack

Answer

Continuous ice pack

Answer

Pressure and pack

Answer

Intermittent hot pack

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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