Regional Anesthesia Practice Questions

Q: All are correct about the regional anesthesia provided to the patient except:

Provides intense surgical anesthesia for 120 minutes. *Provides intense surgical anesthesia for 120 minutes* - The image depicts a technique strongly resembling a **Bier block**, a form of intravenous regional anesthesia. While it provides intense surgical anesthesia, its duration is limited, typically to **60-90 minutes**, to minimize tourniquet-related complications and systemic local anesthetic toxicity post-release. - Suggesting it lasts for 120 minutes is generally **incorrect** as safe practice dictates a shorter duration for the tourniquet application in this type of block. *Bier's block* - The image shows a **tourniquet** applied to the upper arm and an intravenous catheter in the forearm. This setup is characteristic of a **Bier block** (intravenous regional anesthesia), which involves exsanguinating the limb, applying a tourniquet, and then injecting a local anesthetic intravenously into the isolated limb. - This method provides **anesthesia to the limb distal to the tourniquet** for short surgical procedures. *Extremity exsanguinated with esmark elastic bandage tied from distal to proximal end* - Before injecting the local anesthetic in a Bier block, the limb is typically **exsanguinated** (emptied of blood) to ensure the anesthetic remains confined and to improve its effectiveness. - This is commonly achieved by raising the limb and wrapping it with an **Esmarch elastic bandage from distal to proximal**, pushing blood out of the limb. *Can lead to seizures* - Should the **tourniquet fail or be prematurely deflated**, the local anesthetic can rapidly enter the systemic circulation. - This sudden systemic influx of local anesthetic can lead to **central nervous system toxicity**, manifesting as **seizures**, cardiac arrhythmias, and potentially cardiac arrest.

Q: Which finding indicates correct placement of needle in this nerve block? (Recent NEET Pattern 2016-17)

Increase in skin temperature of ipsilateral arm. ***Increase in skin temperature of ipsilateral arm*** - A successful **stellate ganglion block** interrupts the **sympathetic efferent fibers** that innervate the ipsilateral arm. - This interruption leads to **vasodilation** in the blood vessels of the arm, resulting in increased blood flow and thus, a rise in skin temperature. *Decrease in skin temperature of ipsilateral arm* - A decrease in skin temperature would indicate **vasoconstriction**, which is the opposite effect of a successful sympathetic block. - This would suggest either an ineffective block or stimulation of sympathetic activity. *Increase in sweating of ipsilateral arm* - The stellate ganglion also carries **sympathetic fibers** to the sweat glands. A successful block would inhibit sweat gland activity. - Increased sweating (known as **diaphoresis**) would indicate an inadequate block or irritation of the ganglion, leading to increased sympathetic outflow. *Decrease in sweating of ipsilateral arm* - While a **decrease in sweating** (anhidrosis) is indeed a sign of effective sympathetic blockade to the arm, it is typically less immediate and less clinically observable than the change in skin temperature. - The most easily and consistently observed sign of sympathetic denervation in the arm is the increase in skin temperature due to vasodilation.

Q: All are contraindications of this anesthesia technique except: (Recent NEET Pattern 2016-17)

Aortic aneurysm. ***Aortic aneurysm*** - An **aortic aneurysm** is not a contraindication for **epidural anesthesia**. In fact, epidural anesthesia can be beneficial for patients with aortic aneurysms during surgical repair as it can help stabilize hemodynamics and provide effective pain control. - The image shows a needle entering the **epidural space**, indicating this question pertains to epidural anesthesia. *Bleeding diathesis* - **Bleeding diathesis** is a **relative contraindication** for **epidural anesthesia** due to the increased risk of **epidural hematoma**, which can cause neurological damage. - The formation of an **epidural hematoma** can lead to spinal cord compression. *Severe aortic stenosis* - **Severe aortic stenosis** is a **contraindication** for **epidural anesthesia** because the associated **vasodilation** from regional anesthesia can lead to a drastic drop in blood pressure, which these patients cannot tolerate as their fixed cardiac output relies on adequate preload. - Patients with **severe aortic stenosis** are highly susceptible to **hypotension** and cardiac collapse. *Uncooperative patient* - An **uncooperative patient** is a **contraindication** for **epidural anesthesia** as proper positioning and patient cooperation are crucial for safe needle placement. - Lack of cooperation increases the risk of **neurological injury** during the procedure.

Q: All are complications of this anesthesia technique except: (Recent NEET Pattern 2016-17)

Paralytic ileus. **SPINAL ANESTHESIA COMPLICATIONS ANALYSIS:** ***Paralytic ileus*** - While spinal anesthesia can cause some **decreased bowel motility** due to sympathetic blockade, true **paralytic ileus** is primarily associated with **abdominal surgery**, **prolonged opioid use**, **electrolyte imbalances**, or **systemic illness**. - **Paralytic ileus** is not considered a direct complication of spinal anesthesia technique itself, making it the exception among the given options. *Bradycardia* - Direct result of **sympathetic blockade** affecting **cardiac accelerator fibers**, leading to unopposed **vagal activity**. - Common complication of spinal anesthesia due to blocked sympathetic innervation that normally maintains heart rate. *Sudden cardiac arrest* - Rare but serious complication from severe **bradycardia** and **hypotension**, especially with **high spinal blocks**. - Can occur when sympathetic blockade extends too high, affecting critical **cardiovascular control mechanisms**. *Decrease in vital capacity* - Results from **motor blockade** of **intercostal muscles** and potentially **phrenic nerve** with high spinal blocks. - Respiratory compromise can be significant, particularly in patients with pre-existing **pulmonary disease**. **Conclusion:** Paralytic ileus is the exception as it is not a direct complication of spinal anesthesia, unlike the other cardiovascular and respiratory complications listed.

Q: Name the spinal needle shown in the image:

A= Quincke, B= Sprotte. ***A= Quincke, B= Sprotte*** - Image A shows a **Quincke needle**, characterized by a **sharp, beveled tip** with an opening at the bevel. This design cuts through tissue rather than separating it. - Image B depicts a **Sprotte needle**, which is a **pencil-point needle** with a non-cutting tip and a side opening. This design aims to spread dural fibers rather than cut them, potentially reducing the risk of post-dural puncture headache. *A= Quincke, B= Whitacre* - While A correctly identifies the **Quincke needle**, B is incorrectly identified as a Whitacre needle. - A **Whitacre needle** is also a pencil-point needle, but its side opening is narrower and closer to the tip compared to the Sprotte needle. *A= Sprotte, B= Whitacre* - This option incorrectly identifies needle A as a **Sprotte needle**. The beveled tip is characteristic of a Quincke. - It also incorrectly identifies needle B as a Whitacre; B's side opening is more elongated and further from the tip than a typical Whitacre. *A= Sprotte, B= Quincke* - This option completely reverses the correct identification. Needle A is clearly a **Quincke** due to its sharp bevel. - Needle B is a **Sprotte** type with its pencil-point design and side opening, not a Quincke.

Q: Which is not true regarding the procedure done with the needle shown below?

Breath holding is not necessary. ***Breath holding is not necessary*** - This statement is **FALSE** - breath holding **IS necessary** during lumbar puncture to maximize **opening pressure** measurement and reduce **CSF pressure variations**. - Patients are typically instructed to hold their breath in **expiration** to minimize movement artifacts and obtain accurate pressure readings. *Coagulopathy is not an absolute contraindication* - This statement is **TRUE** - coagulopathy is considered a **relative contraindication**, not an absolute one for lumbar puncture. - The procedure can often be performed safely after **correcting clotting abnormalities** or with careful risk-benefit assessment and meticulous technique. *Bevel should be facing upwards while inserting the needle* - This statement is **TRUE** - the needle should be inserted with the **bevel facing upwards** (or laterally in lateral position) to minimize **dural trauma**. - This orientation allows dural fibers to **spread rather than cut**, reducing the risk of **post-dural puncture headache (PDPH)**. *To be done in lateral recumbent position* - This statement is **TRUE** - **lateral recumbent position** is one of the standard positions for lumbar puncture, especially for measuring **opening pressure** accurately. - Alternative **sitting position** may be used for obese patients or those with difficult anatomical landmarks, but lateral recumbent remains a correct approach.

Q: A patient is placed in the **lateral decubitus position** (lying on their side with knees drawn toward the chest and the spine flexed/arched outward) before the procedure. This position is maintained during which of the following types of anaesthesia?

Spinal anaesthesia. ***Spinal anaesthesia*** - The **lateral decubitus position** with flexed spine and knees drawn to chest maximally opens the **intervertebral spaces**, facilitating needle insertion into the **subarachnoid space**. - This **fetal position** increases the distance between spinous processes, making identification of anatomical landmarks easier for **lumbar puncture**. *Bier's block* - Requires the patient in **supine position** with the affected limb elevated to achieve **exsanguination** before tourniquet application. - The procedure involves **intravenous injection** into a peripheral vein of the isolated limb, not spinal positioning. *Caudal anaesthesia* - Typically performed in **prone position** or **jack-knife position** to provide optimal access to the **sacral hiatus**. - The lateral decubitus position does NOT facilitate access to the **caudal epidural space** through the sacrococcygeal membrane. *Stellate block* - Requires **supine position** with slight **neck extension** to access the **anterior paratracheal space** at C6-C7 level. - The lateral decubitus position would make identification of **cervical landmarks** and **carotid artery** extremely difficult and unsafe.

Q: Contraindications to epidural analgesia include the following except

Hypertension. ***Hypertension*** - While careful monitoring is needed, **uncontrolled hypertension** is not an absolute contraindication to epidural analgesia. - Epidural analgesia can sometimes even help to lower blood pressure, which might be beneficial in certain hypertensive patients. *Infection over the back* - This is a significant contraindication due to the risk of introducing bacteria into the **epidural space**, leading to severe infections like **epidural abscess** or **meningitis**. - A local infection could spread to the central nervous system, causing grave complications. *Raised intracranial pressure* - This is a contraindication because a sudden decrease in **cerebrospinal fluid pressure** from epidural needle insertion can exacerbate herniation in patients with **raised ICP**. - The procedure itself can further alter intracranial dynamics, posing a significant risk. *Coagulopathy* - **Coagulopathy**, whether due to medication (e.g., anticoagulants) or a pre-existing medical condition, is a major contraindication. - There is an increased risk of **epidural hematoma**, which can compress the spinal cord and lead to permanent neurological damage.

Q: What is the name of the nerve block technique shown in the image?

Intra-arterial anesthesia. ***Intra-arterial anesthesia*** - The image shows a **cannula inserted directly into an artery**, indicated by the blood reflux and the context of anesthesia, suggesting direct drug delivery into the arterial system. - This method is used for specific types of regional pain management or diagnostic procedures where direct arterial access is required for **localized drug distribution**. *Bier's block* - A Bier's block, or **intravenous regional anesthesia**, involves injecting local anesthetic into a **vein** in an extremity after it has been exsanguinated and isolated by a tourniquet. - The image clearly shows a **bright red blood flash**, characteristic of arterial cannulation, not venous. *Regional anesthesia* - This is a broad term referring to the **anesthesia of a specific region** of the body and encompasses various techniques. - While intra-arterial anesthesia is a type of regional anesthesia, "regional anesthesia" itself is too general to specifically describe the technique shown. *Axillary block* - An **axillary block** is a type of peripheral nerve block targeting the brachial plexus in the axilla to anesthetize the arm. - The image does not depict the axillary region or the characteristic needle placement for an axillary block; instead, it shows direct vascular access.

Q: The duration of spinal anaesthesia is based directly on:

Dose. ***Dose*** - The **total mass** (dose) of the local anesthetic administered directly influences the number of nerve fibers blocked and the duration of block. - A higher dose of a given local anesthetic generally leads to a **longer duration** of action in spinal anesthesia. *Height* - While patient height can influence the **spread** of spinal anesthesia due to differences in spinal column length, it does not directly determine the **duration** of the block. - The **volume** of the injectate, rather than the patient's height alone, affects the cranial spread of the anesthetic. *Total body fat* - Total body fat has **minimal direct impact** on the duration of spinal anesthesia since local anesthetics are injected directly into the cerebrospinal fluid, largely bypassing systemic fat distribution initially. - **Lipid solubility** of the drug affects its potency and duration within the neuraxis, not external body fat. *Age* - **Age** can influence the **spread** and **onset** of spinal anesthesia due to changes in cerebrospinal fluid volume and spinal cord compliance, but it is not the primary determinant of **duration**. - Older patients may experience a greater spread for a given dose, but the primary factor for duration remains the total drug dose.

Question 1

All are correct about the regional anesthesia provided to the patient except:

Accepted Answer

Provides intense surgical anesthesia for 120 minutes

Answer

Bier's block

Answer

Extremity exsanguinated with esmark elastic bandage tied from distal to proximal end

Answer

Can lead to seizures

Question 2

Which finding indicates correct placement of needle in this nerve block? (Recent NEET Pattern 2016-17)

Accepted Answer

Increase in skin temperature of ipsilateral arm

Answer

Decrease in skin temperature of ipsilateral arm

Answer

Increase in sweating of ipsilateral arm

Answer

Decrease in sweating of ipsilateral arm

Question 3

All are contraindications of this anesthesia technique except: (Recent NEET Pattern 2016-17)

Accepted Answer

Aortic aneurysm

Answer

Bleeding diathesis

Answer

Severe aortic stenosis

Answer

Uncooperative patient

Question 4

All are complications of this anesthesia technique except: (Recent NEET Pattern 2016-17)

Accepted Answer

Paralytic ileus

Answer

Bradycardia

Answer

Sudden cardiac arrest

Answer

Decrease in vital capacity

Question 5

Name the spinal needle shown in the image:

Accepted Answer

A= Quincke, B= Sprotte

Answer

A= Quincke, B= Whitacre

Answer

A= Sprotte, B= Whitacre

Answer

A= Sprotte, B= Quincke

Question 6

Which is not true regarding the procedure done with the needle shown below?

Accepted Answer

Breath holding is not necessary

Answer

Bevel should be facing upwards while inserting the needle

Answer

To be done in lateral recumbent position

Answer

Coagulopathy is not an absolute contraindication

Question 7

A patient is placed in the **lateral decubitus position** (lying on their side with knees drawn toward the chest and the spine flexed/arched outward) before the procedure. This position is maintained during which of the following types of anaesthesia?

Accepted Answer

Spinal anaesthesia

Answer

Bier's block

Answer

Caudal anaesthesia

Answer

Stellate block

Question 8

Contraindications to epidural analgesia include the following except

Accepted Answer

Hypertension

Answer

Infection over the back

Answer

Raised intracranial pressure

Answer

Coagulopathy

Question 9

What is the name of the nerve block technique shown in the image?

Accepted Answer

Intra-arterial anesthesia

Answer

Bier's block

Answer

Regional anesthesia

Answer

Axillary block

Question 10

The duration of spinal anaesthesia is based directly on:

Accepted Answer

Dose

Answer

Height

Answer

Total body fat

Answer

Age

Regional Anesthesia — MCQs

Regional Anesthesia — MCQs

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