Click here for a video on how to calculate the stroke volume (skip to 21:30 in the video) VR has classically been assessed by determining the stroke volume before and after a passive leg raise or a fluid bolus.The RUSH exam does not include an assessment of volume responsiveness (VR), but a new article by Blaivas, Aguiar, and Blanco suggests that it should be.The RUSH exam is a rapid way to identify the cause of shock using ultrasound.Patients who had a witnessed arrest and bystander CPR had higher rates of survival with either lidocaine or amiodarone compared to saline while there was no difference between the two. No statistically significant difference was found in hospital survival or neurologic outcomes between any of the groups.Several sub-group analyses were planned a priori. The trial randomized 3,026 patients to receive amiodarone (974), lidocaine (993), or normal saline (i.e., placebo) (1,059) the primary outcome was survival to hospital discharge and the secondary outcome was favorable neurological outcome at hospital discharge.The trial evaluated patients presenting with out of hospital cardiac arrest secondary to VF or pulseless VT that is refractory to one or more shock. A recently published study in the NEJM evaluated these drugs by performing a double-blind, randomized, placebo-control trial. Their efficacy towards survival to hospital discharge and neurological outcome, however, has been questioned. Amiodarone and lidocaine are commonly used antiarrhythmics for ventricular fibrillation (VF) or pulseless ventricular tachycardia (VT).Since Facial nerve also does some taste it comes closely following the facial nerve.ĬN X or 10: Vagus (the party starts at 10pm in vegas! Vagus is a huge nerve so it does both motor and sensory).ĬN XI or 11: Spinal Accessory: We saw this nerve innervating spinal muscles and its similar to spinal (not cranial) nerves so it must be motor only and lower ranked on the stem.ĬN XII or 12: Hypoglossal: Tongue muscle nerve gets to be the last in the chain! It is just tongue muscles so motor only. Abducens (we are back in order! “I soT for lArs” second part of this phrase l and r stand for the muscle lateral rectus which the abducens nerve controls)ĬN VII or 7: Facial: (CN 7 lucky number 7 is the nerve that gets to show facial expression of surprise when winning a jackpot! Important nerve does both sensory and motorĬN VIII or 8: Vestibulocochlear (CN 8 travels with 7 so it must come right after in sequence does cochlear = hearing vestibular = balance so only sensoryĬN IX or 9: Glossopharyngeal (DONT MIX UP WITH CN XII HYPOGLOSSAL WHICH IS MOTOR ONLY this tongue nerve (glosso=tongue) does both taste AND motor. Trigeminal (The trigeminal nerve is an exception to the first nerves being only eye nerves but it does all the sensation of your face and has 3 parts CNVa (occipital), CNVb (maxillary), CNVc (mandibular) Part Vb and Vc also do motor so CN5 is BOTH sensory and motor!ĬN VI or 6. Trochlear (“I soT for lArs” Superior oblique eye movement (covered later) by Trochlear SOT is first part of mnemonic so trochlear is CN IV: does ONLY MOVEMENT via superior oblique for EYES motor)ĬN V or 5. Oculomotor (eye muscles are most inward so it is CN III does ONLY MOVEMENT EYES motor)ĬN IV or 4. Optic (eyes stick out second farthest so it is CN II does ONLY VISION sensory)ĬN III or 3. Olfactory (nose sticks out farthest so it is CN I does ONLY SMELL sensory)ĬN II or 2. “Oh Oh Oh To Touch And Feel A Girls Very Soft Hands” or try Trend finding for memorization where you assume that nerves of eyes come first + more important nerves are both sensory and motor (others are just sensory or just motor)ĬN I or 1. Use a mnemonic (it’s not as difficult as they make it out to be the tough part during medical school is memorizing their “route” which is similar to being asked to memorize map quest directions)
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