Inhalation anesthetics fall into what two categories? (Select all that apply, one, some or all)
Volatile liquids
Amide-linked
None of the above
Gases
Ester-linked
Correct Answer : A,D
A. Volatile liquids are anesthetic agents that are liquid at room temperature but readily vaporize so they can be administered through inhalation. These agents, including isoflurane, sevoflurane, and desflurane, are commonly used for maintaining general anesthesia. They are typically delivered with oxygen or other carrier gases through an anesthesia machine. Their rapid vaporization and precise control over concentration make them ideal for adjusting the depth of anesthesia during surgery.
B. Amide-linked refers to a class of local anesthetics, such as lidocaine, bupivacaine, and ropivacaine. These agents are not inhaled but are administered via injection for regional or local anesthesia, making this category unrelated to inhalation anesthetics.
C. There are clearly defined categories for inhalation anesthetics, so “none of the above” is inaccurate.
D. Gases are another class of inhalation anesthetics that are gaseous at room temperature, with nitrous oxide being the most widely used example. These agents can induce or maintain anesthesia and are delivered through inhalation. Unlike volatile liquids, gases do not require vaporization but are administered in controlled concentrations mixed with oxygen.
E. Ester-linked refers to another type of local anesthetic, such as procaine or tetracaine. These are not inhaled and are primarily used for local or regional anesthesia, so they do not belong to the inhalation anesthetic category.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","E"]
Explanation
A. Alpha-glucosidase inhibitors, such as acarbose or miglitol, delay carbohydrate absorption in the intestine, which blunts postprandial blood glucose spikes. While these medications do not directly cause hypoglycemia, hypoglycemia can occur if they are used in combination with other antidiabetic medicationslike sulfonylureas or insulin. Patients should be educated to recognize and manage hypoglycemia, especially when taking combination therapy.
B. Gastrointestinal side effects are common with alpha-glucosidase inhibitors because undigested carbohydrates are fermented by intestinal bacteria, leading to osmotic effects and increased stool water content, which can result in diarrhea. Patients should be informed that these effects are usually mild to moderateand often improve over time with continued use.
C. Fluid retention is not associated with alpha-glucosidase inhibitors. This adverse effect is more typical of medications such as thiazolidinediones(e.g., pioglitazone, rosiglitazone).
D. Alpha-glucosidase inhibitors have no effect on iron metabolism. This is unrelated to the mechanism of action of these medications.
E. Flatulence is a common side effect because carbohydrates that are not digested in the small intestine are fermented by colonic bacteria, producing gas. Patients should be educated that this is expected, typically harmless, and often decreases with continued therapy.
Correct Answer is A
Explanation
A. Local anesthetics work by reversibly binding to voltage-gated sodium channelson the neuronal cell membrane. By blocking sodium influx, they prevent the generation and propagation of action potentials, which interrupts the transmission of pain signals from the peripheral nerves to the central nervous system. This is the primary mechanism by which local anesthetics provide analgesia.
B. Local anesthetics do the oppositeof increasing impulse conduction. They inhibit nerve impulse transmissionto prevent the sensation of pain, not enhance it.
C. Calcium channels are important for neurotransmitter release at synaptic terminals, but local anesthetics do not primarily target calcium channelsto suppress pain. Calcium channel blockers are a different class of medications used for cardiac and vascular effects.
D. Potassium channels help in repolarization of neurons. Local anesthetics do not block potassium channels as their main action. Their analgesic effect is specifically due to sodium channel blockade.
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