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Guru Poster Anaesthesia EU Regional Anaesthesia for Upper Limb Interscalene Identify: 2-3 roots in a vertical helps to identify the correct level alignment between anterior and (symmetrical tubercles at C5, larger Sternomastoid middle scalene muscles; identify C5 & anterior tubercle at C6, no anterior C5 middle scalene C6 nerve roots; use doppler to check tubercle at C7). for vascular structures . C6 Avoid: The dorsal scapular nerve DSN Target: Using an in-plane approach (DSN) lies in the middle scalene anterior scalene from the posterior end of the probe muscle-avoid direct needle trauma; aim for the interscalene groove the vertebral artery lies deeper but C7 between the C5 and C6 roots. within needle range; large volume injections increase the risk of phrenic VA Interscalene Tips: An easy way to locate the nerve, sympathetic blockade (Horner’s interscalene site is to scan up from the syndrome) or epidural spread. C7 tranverse process shoulder, proximal supraclavicular region; the distinctive humerus surgery morphology of the transverse processes anterior posterior Supraclavicular Identify: The subclavian artery lying Tips: Rotate the lateral end of the on the first rib with underlying pleura. probe a little posteriorly to optimise omohyoid suprascapular The brachial plexus appears as a the image; keep the 1st rib in view nerve honeycombed structure lateral and beyond the needle tip to protect anterior superficial to the artery. against pneumothorax. scalene SCA Target: Using an in-plane needle Avoid: Pneumothorax: avoid needle middle scalene approach from the lateral end of tip penetrating beyond the first rib - it 1st rib brachial plexes the probe. You may need to make is vital to keep the tip in view throughout. 2-3 injections in the brachial plexus sheath to ensure LA spread to all Supraclavicular components including the “corner pocket” between the artery and rib. humerus, elbow, pleura hand surgery medial lateral Infraclavicular Identify: The pectoralis major & minor Tips: Arm abduction and external muscles, the axillary artery and vein, rotation improves the view and needle the 3 cords arranged around the access below the clavicle but is not artery. essential; the pectoral muscles help pec major to anchor nerve catheters at this site. Target: Using an in-plane approach pec minor from the cephalad end of the probe Avoid: Pneumothorax, blood vessel aim for the posterior cord deep to puncture (check for the cephalic vein medial the artery and check LA spread, joining the axillary vein). AA inject around the lateral cord on AV lateral Infraclavicular needle withdrawal, redirect the needle over the artery to the medial cord if posterior humerus, elbow, necessary. hand surgery caudad caphalad Identify: The axillary artery and veins Tips: Scan distally to confirm each Axillary medial (often multiple). The conjoint tendon nerve identity (median n stays with cutaneous nerve of teres major and latissimus dorsi brachial artery, ulnar n moves medially V is important: the four target nerves and superficially to the cubital tunnel, biceps U V (musculocutaneous, median, ulnar, radial n dives deep towards the M V radial) will lie above that tendon. The medial border of humerus with the AA R medial cutaneous n of the forearm profunda brachii artery); a nerve lies between median and ulnar just stimulator can be used to confirm V conjoint tendon beneath the deep fascia. nerve identity; expect variation in the position of nerves. coracobrachialis Target: Using an in-plane approach from the lateral end of the probe target Avoid: Intravascular injection (multiple triceps Axillary each nerve in turn (we block them in vessels) - watch the ultrasound for elbow, forearm, order: MC, R, U, M to preserve the injectate spread with each injection; hand surgery ultrasound view). avoid intrafascicular nerve trauma. caphalad caudad Peripheral nerves Radial brachial artery Median Ulnar ulnar nerve radial nerve median nerve medial humerus epicondyle lateral medial lateral medial medial lateral Proximal: Flex the elbow, place the probe over the lower 1/3 of the Proximal: Extend the elbow, the nerve lies medial to the brachial artery just Proximal: On the medial side of the distal humerus, above the humerus in an axial plane, look for the rounded appearance of the nerve above the elbow skin crease. medial epicondyle, locate the nerve before the nerve enters the cubital looping around the distal humerus. tunnel. Do not block the nerve in the tunnel itself. Radial Median ulnar nerve Ulnar radial nerve medial nerve ulnar artery elbow joint lateral medial lateral medial lateral medial Distal: Extend the elbow, place the probe over the lateral half of the Distal: At the mid-forearm level the nerve is a hyperechoic, honeycombed Distal: Nerve lies on the medial side of the ulnar artery. Starting at the wrist, elbow crease. The radial nerve here has a characteristic spindle shape (2 structure at the centre of 3 fascial planes. There may be an accompanying scan proximally until they separate. components + artery). artery which should be avoided. Twitter YouTube Palmar Dorsal Lower lateral cutaneous n. Lower lateral cutaneous n. Radial n. of arm (Radial n.) of arm (Radial n.) Radial n. Get the Median n. Lateral cutaneous n. of forearm Axillary n. Axillary n. Lateral cutaneous n. of forearm Median n. APP (Musculocutaneous n.) (Musculocutaneous n.) Android iPad iPhone Supraclavicular n. (Cervical plexus) Intercostobrachial n. Ulnar n. Medial cutaneous n. Medial cutaneous n. Ulnar n. of arm of the forearm Medial cutaneous n. Medial cutaneous n. Posterior cutaneous n. Posterior cutaneous n. of the forearm of arm of arm (Radial n.) of the forearm (Radial n.) FOR FURTHER INFORMATION [email protected] · pajunk.com *This poster is an educational aid. It should not be used as a sole source of information for a new technique. Variations in anatomy are to be expected and no responsibility can be accepted for the technical ability of the practioner and individual patient outcomes. Regional Anaesthesia for Lower Limb Fascia iliaca Fascia iliaca – fractured neck of femur, femoral shaft, hip surgery Identify: Start with the probe in a sagittal plane above the muscle and beneath the fascia (and A just medial to the anterior superior iliac spine clearly beneath the circumflex artery). fascia iliaca and slide medially; note the deep circumflex iliac artery (a branch of external iliac) which Tips: Lateral tilt of the probe may improve lies superficial to the fascia 1-2cm above the the view and an assistant may be required to inguinal ligament and is a useful landmark. retract the abdomen in an obese patient. This suprainguinal parasagittal view demonstrates iliacus Target: Use an in-plane approach from the the muscle & fascia passing deep into the caudal end of the probe. The target is to pelvis - gravity aids the spread of LA towards deposit local anaesthetic on the belly the lumbar plexus (this approach is also of the iliacus muscle, beneath the fascia suitable to catheter placement). proximal to the inguinal ligament. Observe the spread of local anaesthetic proximally Avoid: Injection distal to the inguinal ligament. caphalad caudad Femoral Femoral – femoral shaft, quadriceps mechanism, knee surgery Identify: The femoral artery, iliacus and Tips: Choose a proximal site before the nerve fascia lata psoas muscles and fascia iliaca. Identify the branches immediately below the inguinal fascia iliaca indentation between the two components of ligament (if the femoral artery has divided then A femoral nerve iliopsoas. The nerve lies lateral to the artery, you are too distal). The nerve is usually more V usually flattened between the fascia and visible following injection of LA. Quadriceps muscle and it can take on a variety of shapes. weakness will affect active rehabilitation and mobility. iliacus Target: Using an in-plane approach from the psoas lateral end of the probe, local anaesthetic Avoid: Superficial injection, distal injection, injection must be beneath the fascia iliaca; intravascular injection. ensure the spread of LA surrounds the nerve. medial lateral Adductor canal Adductor Canal – knee surgery, cruciate ligament repair, supplement to sciatic nerve block for distal lower limb surgery Identify: The femoral artery beneath the Tips: If necessary trace the femoral artery sartorius muscle. The saphenous nerve lies in down from the inguinal region to the medial sartorius the same fascial plane, anterolateral to the thigh, especially in larger patients. The true artery, accompanied by the nerve to vastus adductor canal starts where the medial medialis. border of sartorius crosses the medial border A of adductor longus. Above that level it is saphenous nerve Target: Using an in-plane approach from technically a femoral triangle block but the vastus medialis V the lateral end of the probe inject in the outcome is similar. fascial plane alongside the femoral artery if adductor the nerve itself is not clearly identified (it will Avoid: Intravascular injection, trauma to the longus be easier to see after injection). nerve supplying vastus medialis. antetior posterior Subgluteal Subgluteal – a proximal approach to the sciatic nerve for surgery below the knee, an alternative to the popliteal approach when access is limited; the posterior cutaneous nerve of the thigh will not be blocked Identify: At this level the sciatic nerve lies the sciatic nerve. biceps femoris between biceps femoris laterally and semi- tendinosus medially. Deep to the nerve is the Tips: Trace the nerve up from the popliteal semitendinosus adductor magnus muscle and there is usually fossa if necessary; tilt the probe to optimize a clear fascial plane between this and the visibility (anisotropy). Track the spread of LA sciatic nerve proximally and distally to ensure complete superficial muscles. The nerve is rarely round, more femur usually flattened or triangular in cross section. coverage of the nerve. Block onset can be adductor magnus delayed dueto the size of the target . Target: Using an in-plane approach from the lateral end of the probe with a longer needle, Avoid: Check for arteries crossing obliquely aim for circumferential spread of LA around deep to the sciatic nerve.
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