What is the lethal concentration, 50% kill?
a. The amount of a substance, measured in milligrams per body mass, that kills half of a group of laboratory animals to which the substance is administered during a preestablished time
b. The concentration of a substance, measured in parts per million, that kills half of a group of laboratory animals to which the substance is administered during a preestablished time
c. The concentration of a substance, in milligrams per kilogram (mg/kg), that kills a laboratory animal within 48 hours
d. The concentration of a substance to which workers can be exposed continuously for a period of approximately 15 minutes without suffering irritation, chronic or irreversible tissue damage, or narcosis sufficient to increase the risk of accidental injury, impair self-rescue, or materially reduce work-related efficiency
B
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You are reassessing a patient who has sustained blunt trauma to the chest. Which one of the following reassessment findings best indicates that the patient is deteriorating and is in the decompensating phase of shock?
a. Pulse of 96 beats per minute b. Blood pressure of 88/50 c. Blood oozing from an abdominal laceration d. Skin that is cool and dry
What is the primary purpose of cross-fiber gliding strokes?
A) to release trigger points B) to create restrictions C) to spread apart tight muscle bands D) to shorten muscle lengths
A longitudinal patient record documents a patient's health status, conditions, and treatments _____________________________
A) using electronic signals to transmit clinical information from one site to another B) ?throughout the patient's life C) in a prospective payment system D) ?throughout the patient's residence in a particular community
All of the following are factors that can affect an individual's ability to attain optimal health except