A patient is transferred from the Emergency Department (ED) to the Intensive Care Unit (ICU) with elevated intracranial pressure (ICP). As part of the nursing assessment, it's crucial to understand the components of the cranial cavity that contribute to ICP. What are the components of the cranial cavity?
Brain, blood, cerebrospinal fluid (CSF)
Cerebrospinal fluid (CSF), blood, oxygen
Brain, cerebrospinal fluid (CSF), air
Brain, blood, lymphatic fluid
The Correct Answer is A
A. Brain, blood, cerebrospinal fluid (CSF): These are the three main components within the cranial vault as described by the Monro-Kellie doctrine. The total volume of these components remains constant, and any increase in one must be offset by a decrease in another to prevent elevated ICP.
B. Cerebrospinal fluid (CSF), blood, oxygen: While CSF and blood are intracranial components, oxygen is not a physical substance occupying volume in the cranial cavity. It is transported within the blood and does not contribute to changes in ICP in terms of physical space.
C. Brain, cerebrospinal fluid (CSF), air: Air is not a normal component of the cranial cavity. The presence of air would indicate pathology, such as a skull fracture with pneumocephalus, which is abnormal and can contribute to increased ICP but is not a standard component.
D. Brain, blood, lymphatic fluid: While the brain and blood are correct components, the central nervous system, including the brain, does not have a conventional lymphatic system like other parts of the body. Waste products are primarily cleared by the glymphatic system, which utilizes CSF, rather than traditional lymphatic fluid.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. 60–89 mL/min/1.73m²: This range indicates mildly decreased GFR, often classified as Stage 2 chronic kidney disease. Renal function is still relatively preserved and not considered renal failure at this stage.
B. 30–59 mL/min/1.73m²: This reflects a moderate decrease in GFR, typically Stage 3 CKD. Although kidney function is significantly impaired, it is not yet categorized as renal failure.
C. 15–29 mL/min/1.73m²: This GFR indicates severe kidney impairment and is classified as Stage 4 CKD. While this stage shows significant dysfunction, renal failure is generally diagnosed at lower values.
D. <15 mL/min/1.73m²: A GFR below 15 signals end-stage renal disease (ESRD), also referred to as renal failure. At this stage, dialysis or kidney transplantation is usually necessary to sustain life.
Correct Answer is C
Explanation
A. Bruton's disorder: Also known as X-linked agammaglobulinemia, this is a primary immunodeficiency that results in absent or reduced B cells and recurrent bacterial infections. It does not involve distinct facial features or limb defects as described in the question.
B. SCID: Severe Combined Immunodeficiency involves profound defects in both B and T lymphocyte function, leading to severe infections early in life. It is not associated with the described craniofacial abnormalities or limb deformities.
C. Potter syndrome: This condition is caused by severe oligohydramnios, often due to bilateral renal agenesis, and leads to characteristic physical features including widely spaced eyes with epicanthic folds, low-set ears, a broad or beaked nose, a receding chin, and limb deformities.
D. Down Syndrome: While individuals with Down Syndrome often have characteristic facial features such as upslanting palpebral fissures, flat nasal bridges, and low-set ears, they typically do not have beak-like noses, receding chins, or limb defects in the way described.
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