Welcome to your Test 19 Which root levels form the brachial plexus? C1–C4 C5–T1 C3–C7 T1–T5 None Interscalene block is most suitable for which type of surgery? Hand surgery Elbow surgery Shoulder surgery Wrist surgery None Which nerve is typically spared in an interscalene block? Radial nerve Median nerve Ulnar nerve Axillary nerve None Which is the most compact location to block all cords of the brachial plexus? Interscalene region Supraclavicular fossa Infraclavicular region Axilla None Which structure lies lateral to the subclavian artery in a supraclavicular ultrasound image? Lung apex First rib Brachial plexus Carotid artery None Which block has the highest risk of pneumothorax? Axillary block Infraclavicular block Supraclavicular block Interscalene block None Which nerve must be blocked separately in an axillary block? Median Radial Ulnar Musculocutaneous None The infraclavicular block targets which part of the brachial plexus? Roots Trunks Cords Branches None What is the most common complication of interscalene block? Pneumothorax Seizure Phrenic nerve palsy Hematoma None Which approach provides the most motor-sparing block for wrist surgery? Supraclavicular Interscalene Axillary Selective distal nerve blocks None Which position optimizes ultrasound visualization during an infraclavicular block? Supine, arm adducted Supine, arm abducted 90° Lateral, arm extended Prone, arm abducted None Which nerves are commonly missed in a supraclavicular block? Axillary and radial Ulnar and median Suprascapular and intercostobrachial Musculocutaneous and median None Which block is most suitable for creating an arteriovenous fistula at the wrist? Interscalene Axillary Infraclavicular Supraclavicular None Which LA combination is best for rapid onset and longer duration? Lidocaine + epinephrine Ropivacaine + bupivacaine Lidocaine + bupivacaine Mepivacaine + ropivacaine None What is the typical sonoanatomy of the brachial plexus in the axillary block? Hypoechoic circles around axillary artery Triangular hyperechoic clusters Round anechoic structures beneath subclavian Irregular echogenic lines along bone None The radial nerve is best blocked at which location in the forearm? Cubital fossa Mid-forearm lateral aspect Near styloid process In the palm None What nerve must be blocked to anesthetize the dorsal thumb? Median nerve Ulnar nerve Radial nerve Musculocutaneous nerve None What is a sign of intraneural injection during an upper limb block? High resistance to injection Nerve swelling on ultrasound Patient reports paresthesia All of the above None Which nerve supplies sensation over the lateral forearm? Radial nerve Median nerve Lateral cutaneous nerve of forearm (from musculocutaneous) Medial antebrachial cutaneous nerve None The costoclavicular approach to infraclavicular block is advantageous because: It’s safer in obese patients Nerves are clustered together Less needle depth required All of the above None Which nerve controls thumb opposition? Radial nerve Ulnar nerve Median nerve Axillary nerve None What is the sensory innervation of the medial one and a half fingers? Radial nerve Ulnar nerve Median nerve Musculocutaneous nerve None Which ultrasound probe is ideal for upper limb blocks? Curvilinear 2–5 MHz Linear 6–15 MHz Phased array 2–4 MHz Intracavitary 4–9 MHz None What is a common cause of failed axillary block? Incomplete LA spread Missing musculocutaneous nerve Vascular puncture All of the above None Which LA is preferred for prolonged postoperative analgesia after upper limb block? Lidocaine Bupivacaine Mepivacaine Prilocaine None Which nerve injury is most common following an axillary block? Median nerve Radial nerve Ulnar nerve Musculocutaneous nerve None What is the function of the anterior interosseous nerve (AIN)? Sensory innervation to the palm Motor supply to flexor pollicis longus and pronator quadratus Sensory innervation to the dorsal hand Motor to the intrinsic hand muscles None What is a common complication of radial nerve injury at the spiral groove? Wrist drop Claw hand Ape thumb Shoulder drop None Which nerve provides cutaneous sensation over the lateral shoulder? Musculocutaneous Radial Axillary Median None In ultrasound, which artery is used as a landmark in the axillary block? Brachial artery Subclavian artery Radial artery Axillary artery None Which maneuver helps improve needle visibility in US-guided blocks? Increase gain Use compound imaging Align needle in-plane All of the above None What is the best block for distal radius fixation surgery? Interscalene block Supraclavicular block Infraclavicular block Distal median + radial + ulnar block None Which nerve travels in the radial groove with the profunda brachii artery? Ulnar nerve Median nerve Radial nerve Axillary nerve None Which nerve can be visualized in the forearm between two heads of the pronator teres? Ulnar nerve Radial nerve Median nerve Musculocutaneous nerve None A patient undergoing hand surgery develops Horner’s syndrome. Which block is likely responsible? Supraclavicular Infraclavicular Interscalene Axillary None Which block is preferred for finger reimplantation surgery? Supraclavicular Interscalene Axillary with tourniquet block Brachial plexus block + GA None Which muscle is pierced by the musculocutaneous nerve? Biceps brachii Triceps brachii Coracobrachialis Brachialis None What is the innervation of the dorsal web space between thumb and index finger? Median nerve Radial nerve Ulnar nerve Axillary nerve None Which technique reduces vascular puncture during axillary block? Always use ultrasound Aspirate frequently Avoid high-pressure injection All of the above None Which LA is most cardiotoxic? Lidocaine Ropivacaine Bupivacaine Chloroprocaine None Which nerve root lesion causes loss of elbow flexion and shoulder abduction? C5 C6 C7 T1 None Which LA provides a differential block: sensory > motor? Lidocaine Bupivacaine Ropivacaine Prilocaine None Which of the following is a sign of successful axillary block? Inability to abduct the arm Numbness in the thumb and forefinger Horner’s syndrome Nasal stuffiness None Which maneuver enhances ultrasound view of axillary artery? Head tilt to opposite side External rotation of arm Deep inspiration Flexion of wrist None Which nerve passes posterior to the medial epicondyle? Ulnar nerve Radial nerve Median nerve Axillary nerve None Which nerve supplies the anconeus muscle? Median nerve Ulnar nerve Radial nerve Musculocutaneous nerve None During a supraclavicular block, how can pleura be identified? Hyperechoic linear structure Hypoechoic circular shadow “Sliding sign” under lung apex None of the above None Which nerve lies within the spiral groove of the humerus? Ulnar Radial Median Axillary None In costoclavicular block, which artery lies between the cords? Subclavian artery Axillary artery Brachial artery Circumflex artery None What is the typical onset time for ropivacaine in a brachial plexus block? <2 minutes 5–10 minutes 15–30 minutes >45 minutes None Time's up
