A nurse caring for a head injury comatose patient. Which intervention he/she should implement to prevent incr… - JIPMER Nursing Officer-2017

JIPMER Nursing Officer-2017

Medical Surgical Nursing

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Appeared in: JIPMER Nursing Officer-2017

Explanation

Elevating the head of the bed to approximately 30 degrees is a primary, non-invasive nursing intervention to help prevent or manage increased intracranial pressure (ICP).
This specific position uses gravity to facilitate the drainage of venous blood from the brain through the jugular veins.
By promoting venous outflow, the total volume of blood within the rigid cranial vault is reduced, which directly leads to a decrease in ICP.
This intervention helps maintain adequate cerebral perfusion pressure (CPP) by lowering the opposing ICP.

Option A: A well-lit room provides excessive sensory stimulation. For a patient with a head injury, stimuli like bright lights, loud noises, and excessive touching can increase the brain's metabolic rate and subsequently raise ICP.
Option B: Suctioning, especially on a routine or 'round the clock' schedule, is dangerous as it provokes coughing, straining, and potential hypoxia, all of which cause significant spikes in ICP. It should only be performed when clinically indicated (PRN).
Option C: While repositioning every 2 hours is standard for preventing pressure injuries, the phrase 'change the position round the clock' is vague and potentially harmful. Improper positioning, such as neck flexion/rotation or extreme hip flexion, can obstruct venous drainage and increase ICP.

Clinical Relevance

Nursing practice connection: Use the key finding related to Management of Increased Intracranial Pressure (ICP) to guide bedside assessment, documentation, and the next nursing action.
Managing ICP is a critical nursing function in neurocritical care. Failure to control ICP can lead to decreased cerebral perfusion, secondary brain injury, brain herniation, and death.
Nurses must skillfully cluster care activities (like bathing, turning, and assessments) to minimize stimulation and allow the patient adequate rest periods, preventing cumulative increases in ICP.
What if? If the patient also had hypotension (low blood pressure), simply elevating the head of the bed might decrease cerebral perfusion pressure (CPP = MAP - ICP). In this case, the priority would be to first restore blood pressure with fluids or vasopressors, and then position the patient to optimize both ICP and CPP.

How to Approach the Question

First, identify the key concept: The question asks for a nursing intervention to prevent increased intracranial pressure (ICP) in a high-risk patient (comatose, head injury).
Analyze the pathophysiology of ICP. Pressure inside the skull is determined by the volume of brain tissue, blood, and cerebrospinal fluid (CSF). Interventions should aim to reduce one or more of these volumes.
Evaluate each option's effect on ICP:
Option A (Well-lit room): This increases stimuli, which raises brain metabolism and blood flow, thus increasing ICP. This is incorrect.
Option B (Suctioning): This causes coughing and straining, which dramatically increases intrathoracic pressure, impedes venous outflow from the brain, and spikes ICP. This is incorrect.
Option C (Positioning): Improper positioning (like neck kinking) can block venous drainage, increasing blood volume in the head and raising ICP. This is incorrect.

Concept Tested & Keywords

Concept Tested: Management of Increased Intracranial Pressure (ICP)
Stem keywords: head injury, comatose patient, nursing intervention, prevent increased intracranial pressure
Lead-in keywords: Which intervention
Clinical cues: A comatose patient with a head injury signifies a high risk for neurological complications, particularly elevated ICP.

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E6 Nursing Brunner Adult Health 3SA Vol 2 Part 2 pp. 90-92, 26-28