Morphine sulfate is used preoperatively?

NORCET 5 mains

Pharmacology

Easy

Appeared in: NORCET 5 mains

Explanation

Morphine is a potent opioid analgesic, and its primary indication in the preoperative setting is to manage pain.
In addition to pain relief, morphine provides sedation and reduces anxiety, which helps in achieving a smooth induction of anesthesia.
Using opioids preoperatively can decrease the overall requirement for general anesthetic agents during the surgical procedure.
This effect contributes to a more stable intraoperative course and can aid in postoperative comfort.

Option A: Morphine does not specifically target or reduce the gag reflex. This is not a recognized indication for its use.
Option B: Morphine does not cause constriction of mucous membranes. Its primary actions are on the central nervous system and opioid receptors.
Option C: Reducing secretions is a primary goal of anticholinergic medications, such as atropine or glycopyrrolate. Morphine does not have this effect and can sometimes contribute to nausea.

Visual 1: Table - A comparative table showing different classes of preoperative medications (Opioids, Anticholinergics, Benzodiazepines), their primary uses, and common examples. This will help students differentiate the roles of each drug class.
Visual 2: Diagram - A simple diagram illustrating the main effects of morphine on the central nervous system, highlighting 'Analgesia' and 'Sedation' as key outcomes relevant to preoperative care.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology of Preoperative Medications as background academic context rather than a clinical decision trigger.
A nurse administering preoperative morphine must prioritize monitoring the patient's respiratory rate and oxygen saturation. Opioids can cause respiratory depression, which is a critical patient safety concern.
Understanding the distinct roles of preoperative medications is vital. Confusing an opioid's purpose (pain relief) with an anticholinergic's (secretion control) can lead to inadequate patient preparation and potential intraoperative complications like excessive secretions or uncontrolled pain.
What if? If a patient scheduled for surgery reports significant anxiety but no pain, a benzodiazepine like midazolam might be a more appropriate choice than morphine, as it specifically targets anxiety with potent amnesic effects without the same level of respiratory depression risk.

How to Approach the Question

First, identify the drug mentioned in the question: Morphine sulfate.
Recall the pharmacological class of morphine. It is a potent opioid analgesic.
Consider the context: 'preoperatively'. This means the drug is given before surgery.
Think about the primary goals of preoperative medication. These include reducing anxiety, providing pain relief, preventing secretions, and ensuring a smooth induction of anesthesia.
Evaluate each option based on the known actions of morphine. Does it reduce the gag reflex? No. Does it constrict mucous membranes? No. Does it reduce secretions? No, that's the job of anticholinergics.
Confirm the primary action. Morphine's main role is to relieve pain (analgesia) and calm the patient (anxiolysis). Therefore, 'Pain relief' is the most accurate answer.

Concept Tested & Keywords

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