Mnemonic: I HEAL
Mnemonic: MNM
Lesions outside the thecal sac are categorized as extradural lesions. Remember that everything that isn’t in the thecal sac is extradural, including discs, bones, nerves, and blood vessels.
Origin: C(7), C8, T1 (medial cord of Brachial plexus) Course: Motor innervation: 1. Forearm: Flexor carpi ulnaris (weakness of ulnar deviation and flexion of wrist), Medial half of flexor digitorum profundus (branches near the elbow) 2. Hand: branches near wrist Sensory innervation: Palmar branch at forearm and Digital branch at wrist…
Lateral wall of nasal cavity has: Mnemonic: SPIN 1. Superior meatus: Posterior ethmoidal sinus 2. Inferior meatus: Nasolacrimal duct The sphenoidal sinus drains into spheno-ethmoidal recess (superior to superior concha). All others drain into middle meatus: Mnemonic: AM/FM
Various types of surgical site infection (SSI) have been defined by CDC. Patient related factors Mnemonic: WASHING 1. Weight: Obesity (>20% of ideal body weight) 2. Antibiotic resistant skin flora: MRSA colonization 3. Advancing age 4. Smoking 5. HIV and other immune deficiency conditions 6. Infection coexisting at other sites…